From 37ae00042f57fbd1b846bb0448ce9b9a5ebaef8f Mon Sep 17 00:00:00 2001
From: KemoNine <kemonine@kemonine.info>
Date: Sat, 1 Oct 2022 13:44:09 -0400
Subject: [PATCH] add new markdown packages to org profile ahead of activating
 them for code blocks

---
 .../markdown-mode-autoloads.el                |   64 +
 .../markdown-mode-pkg.el                      |    2 +
 .../markdown-mode.el                          | 9973 +++++++++++++++++
 .../favicon.ico                               |  Bin 0 -> 17734 bytes
 .../markdown-preview-mode-autoloads.el        |   54 +
 .../markdown-preview-mode-pkg.el              |   16 +
 .../markdown-preview-mode.el                  |  418 +
 .../preview.html                              |   41 +
 .../rainbow-delimiters-autoloads.el           |   49 +
 .../rainbow-delimiters-pkg.el                 |    2 +
 .../rainbow-delimiters.el                     |  311 +
 org/elpa/web-server-20210708.2242/dir         |   18 +
 .../web-server-20210708.2242/doclicense.info  |  489 +
 org/elpa/web-server-20210708.2242/gpl.info    |  721 ++
 .../web-server-autoloads.el                   |   75 +
 .../web-server-pkg.el                         |   13 +
 .../web-server-status-codes.el                |  106 +
 .../web-server-20210708.2242/web-server.el    |  749 ++
 .../web-server-20210708.2242/web-server.info  | 2106 ++++
 .../websocket-autoloads.el                    |   22 +
 .../websocket-20210110.17/websocket-pkg.el    |    2 +
 org/elpa/websocket-20210110.17/websocket.el   | 1052 ++
 22 files changed, 16283 insertions(+)
 create mode 100644 org/elpa/markdown-mode-20220829.225/markdown-mode-autoloads.el
 create mode 100644 org/elpa/markdown-mode-20220829.225/markdown-mode-pkg.el
 create mode 100644 org/elpa/markdown-mode-20220829.225/markdown-mode.el
 create mode 100644 org/elpa/markdown-preview-mode-20210516.936/favicon.ico
 create mode 100644 org/elpa/markdown-preview-mode-20210516.936/markdown-preview-mode-autoloads.el
 create mode 100644 org/elpa/markdown-preview-mode-20210516.936/markdown-preview-mode-pkg.el
 create mode 100644 org/elpa/markdown-preview-mode-20210516.936/markdown-preview-mode.el
 create mode 100644 org/elpa/markdown-preview-mode-20210516.936/preview.html
 create mode 100644 org/elpa/rainbow-delimiters-20210515.1254/rainbow-delimiters-autoloads.el
 create mode 100644 org/elpa/rainbow-delimiters-20210515.1254/rainbow-delimiters-pkg.el
 create mode 100644 org/elpa/rainbow-delimiters-20210515.1254/rainbow-delimiters.el
 create mode 100644 org/elpa/web-server-20210708.2242/dir
 create mode 100644 org/elpa/web-server-20210708.2242/doclicense.info
 create mode 100644 org/elpa/web-server-20210708.2242/gpl.info
 create mode 100644 org/elpa/web-server-20210708.2242/web-server-autoloads.el
 create mode 100644 org/elpa/web-server-20210708.2242/web-server-pkg.el
 create mode 100644 org/elpa/web-server-20210708.2242/web-server-status-codes.el
 create mode 100644 org/elpa/web-server-20210708.2242/web-server.el
 create mode 100644 org/elpa/web-server-20210708.2242/web-server.info
 create mode 100644 org/elpa/websocket-20210110.17/websocket-autoloads.el
 create mode 100644 org/elpa/websocket-20210110.17/websocket-pkg.el
 create mode 100644 org/elpa/websocket-20210110.17/websocket.el

diff --git a/org/elpa/markdown-mode-20220829.225/markdown-mode-autoloads.el b/org/elpa/markdown-mode-20220829.225/markdown-mode-autoloads.el
new file mode 100644
index 0000000..9e93ad2
--- /dev/null
+++ b/org/elpa/markdown-mode-20220829.225/markdown-mode-autoloads.el
@@ -0,0 +1,64 @@
+;;; markdown-mode-autoloads.el --- automatically extracted autoloads  -*- lexical-binding: t -*-
+;;
+;;; Code:
+
+(add-to-list 'load-path (directory-file-name
+                         (or (file-name-directory #$) (car load-path))))
+
+
+;;;### (autoloads nil "markdown-mode" "markdown-mode.el" (0 0 0 0))
+;;; Generated autoloads from markdown-mode.el
+
+(autoload 'markdown-mode "markdown-mode" "\
+Major mode for editing Markdown files.
+
+\(fn)" t nil)
+
+(add-to-list 'auto-mode-alist '("\\.\\(?:md\\|markdown\\|mkd\\|mdown\\|mkdn\\|mdwn\\)\\'" . markdown-mode))
+
+(autoload 'gfm-mode "markdown-mode" "\
+Major mode for editing GitHub Flavored Markdown files.
+
+\(fn)" t nil)
+
+(autoload 'markdown-view-mode "markdown-mode" "\
+Major mode for viewing Markdown content.
+
+\(fn)" t nil)
+
+(autoload 'gfm-view-mode "markdown-mode" "\
+Major mode for viewing GitHub Flavored Markdown content.
+
+\(fn)" t nil)
+
+(autoload 'markdown-live-preview-mode "markdown-mode" "\
+Toggle native previewing on save for a specific markdown file.
+
+This is a minor mode.  If called interactively, toggle the
+`Markdown-Live-Preview mode' mode.  If the prefix argument is
+positive, enable the mode, and if it is zero or negative, disable
+the mode.
+
+If called from Lisp, toggle the mode if ARG is `toggle'.  Enable
+the mode if ARG is nil, omitted, or is a positive number.
+Disable the mode if ARG is a negative number.
+
+To check whether the minor mode is enabled in the current buffer,
+evaluate `markdown-live-preview-mode'.
+
+The mode's hook is called both when the mode is enabled and when
+it is disabled.
+
+\(fn &optional ARG)" t nil)
+
+(register-definition-prefixes "markdown-mode" '("defun-markdown-" "gfm-" "markdown"))
+
+;;;***
+
+;; Local Variables:
+;; version-control: never
+;; no-byte-compile: t
+;; no-update-autoloads: t
+;; coding: utf-8
+;; End:
+;;; markdown-mode-autoloads.el ends here
diff --git a/org/elpa/markdown-mode-20220829.225/markdown-mode-pkg.el b/org/elpa/markdown-mode-20220829.225/markdown-mode-pkg.el
new file mode 100644
index 0000000..f1973cc
--- /dev/null
+++ b/org/elpa/markdown-mode-20220829.225/markdown-mode-pkg.el
@@ -0,0 +1,2 @@
+;;; Generated package description from markdown-mode.el  -*- no-byte-compile: t -*-
+(define-package "markdown-mode" "20220829.225" "Major mode for Markdown-formatted text" '((emacs "26.1")) :commit "3f1c61b25cb0677122414e9ea14064a13e548c36" :authors '(("Jason R. Blevins" . "jblevins@xbeta.org")) :maintainer '("Jason R. Blevins" . "jblevins@xbeta.org") :keywords '("markdown" "github flavored markdown" "itex") :url "https://jblevins.org/projects/markdown-mode/")
diff --git a/org/elpa/markdown-mode-20220829.225/markdown-mode.el b/org/elpa/markdown-mode-20220829.225/markdown-mode.el
new file mode 100644
index 0000000..175b211
--- /dev/null
+++ b/org/elpa/markdown-mode-20220829.225/markdown-mode.el
@@ -0,0 +1,9973 @@
+;;; markdown-mode.el --- Major mode for Markdown-formatted text -*- lexical-binding: t; -*-
+
+;; Copyright (C) 2007-2022 Jason R. Blevins and markdown-mode
+;; contributors (see the commit log for details).
+
+;; Author: Jason R. Blevins <jblevins@xbeta.org>
+;; Maintainer: Jason R. Blevins <jblevins@xbeta.org>
+;; Created: May 24, 2007
+;; Version: 2.6-dev
+;; Package-Version: 20220829.225
+;; Package-Commit: 3f1c61b25cb0677122414e9ea14064a13e548c36
+;; Package-Requires: ((emacs "26.1"))
+;; Keywords: Markdown, GitHub Flavored Markdown, itex
+;; URL: https://jblevins.org/projects/markdown-mode/
+
+;; This file is not part of GNU Emacs.
+
+;; This program is free software; you can redistribute it and/or modify
+;; it under the terms of the GNU General Public License as published by
+;; the Free Software Foundation, either version 3 of the License, or
+;; (at your option) any later version.
+
+;; This program is distributed in the hope that it will be useful,
+;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+;; GNU General Public License for more details.
+
+;; You should have received a copy of the GNU General Public License
+;; along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+;;; Commentary:
+
+;; See the README.md file for details.
+
+
+;;; Code:
+
+(require 'easymenu)
+(require 'outline)
+(require 'thingatpt)
+(require 'cl-lib)
+(require 'url-parse)
+(require 'button)
+(require 'color)
+(require 'rx)
+(require 'subr-x)
+
+(defvar jit-lock-start)
+(defvar jit-lock-end)
+(defvar flyspell-generic-check-word-predicate)
+(defvar electric-pair-pairs)
+(defvar sh-ancestor-alist)
+
+(declare-function project-roots "project")
+(declare-function sh-set-shell "sh-script")
+
+
+;;; Constants =================================================================
+
+(defconst markdown-mode-version "2.6-dev"
+  "Markdown mode version number.")
+
+(defconst markdown-output-buffer-name "*markdown-output*"
+  "Name of temporary buffer for markdown command output.")
+
+
+;;; Global Variables ==========================================================
+
+(defvar markdown-reference-label-history nil
+  "History of used reference labels.")
+
+(defvar markdown-live-preview-mode nil
+  "Sentinel variable for command `markdown-live-preview-mode'.")
+
+(defvar markdown-gfm-language-history nil
+  "History list of languages used in the current buffer in GFM code blocks.")
+
+
+;;; Customizable Variables ====================================================
+
+(defvar markdown-mode-hook nil
+  "Hook run when entering Markdown mode.")
+
+(defvar markdown-before-export-hook nil
+  "Hook run before running Markdown to export XHTML output.
+The hook may modify the buffer, which will be restored to it's
+original state after exporting is complete.")
+
+(defvar markdown-after-export-hook nil
+  "Hook run after XHTML output has been saved.
+Any changes to the output buffer made by this hook will be saved.")
+
+(defgroup markdown nil
+  "Major mode for editing text files in Markdown format."
+  :prefix "markdown-"
+  :group 'text
+  :link '(url-link "https://jblevins.org/projects/markdown-mode/"))
+
+(defcustom markdown-command (let ((command (cl-loop for cmd in '("markdown" "pandoc" "markdown_py")
+                                                    when (executable-find cmd)
+                                                    return (file-name-nondirectory it))))
+                              (or command "markdown"))
+  "Command to run markdown."
+  :group 'markdown
+  :type '(choice (string :tag "Shell command") (repeat (string)) function))
+
+(defcustom markdown-command-needs-filename nil
+  "Set to non-nil if `markdown-command' does not accept input from stdin.
+Instead, it will be passed a filename as the final command line
+option.  As a result, you will only be able to run Markdown from
+buffers which are visiting a file."
+  :group 'markdown
+  :type 'boolean)
+
+(defcustom markdown-open-command nil
+  "Command used for opening Markdown files directly.
+For example, a standalone Markdown previewer.  This command will
+be called with a single argument: the filename of the current
+buffer.  It can also be a function, which will be called without
+arguments."
+  :group 'markdown
+  :type '(choice file function (const :tag "None" nil)))
+
+(defcustom markdown-open-image-command nil
+  "Command used for opening image files directly.
+This is used at `markdown-follow-link-at-point'."
+  :group 'markdown
+  :type '(choice file function (const :tag "None" nil)))
+
+(defcustom markdown-hr-strings
+  '("-------------------------------------------------------------------------------"
+    "* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *"
+    "---------------------------------------"
+    "* * * * * * * * * * * * * * * * * * * *"
+    "---------"
+    "* * * * *")
+  "Strings to use when inserting horizontal rules.
+The first string in the list will be the default when inserting a
+horizontal rule.  Strings should be listed in decreasing order of
+prominence (as in headings from level one to six) for use with
+promotion and demotion functions."
+  :group 'markdown
+  :type '(repeat string))
+
+(defcustom markdown-bold-underscore nil
+  "Use two underscores when inserting bold text instead of two asterisks."
+  :group 'markdown
+  :type 'boolean)
+
+(defcustom markdown-italic-underscore nil
+  "Use underscores when inserting italic text instead of asterisks."
+  :group 'markdown
+  :type 'boolean)
+
+(defcustom markdown-marginalize-headers nil
+  "When non-nil, put opening atx header markup in a left margin.
+
+This setting goes well with `markdown-asymmetric-header'.  But
+sadly it conflicts with `linum-mode' since they both use the
+same margin."
+  :group 'markdown
+  :type 'boolean
+  :safe 'booleanp
+  :package-version '(markdown-mode . "2.4"))
+
+(defcustom markdown-marginalize-headers-margin-width 6
+  "Character width of margin used for marginalized headers.
+The default value is based on there being six heading levels
+defined by Markdown and HTML.  Increasing this produces extra
+whitespace on the left.  Decreasing it may be preferred when
+fewer than six nested heading levels are used."
+  :group 'markdown
+  :type 'natnump
+  :safe 'natnump
+  :package-version '(markdown-mode . "2.4"))
+
+(defcustom markdown-asymmetric-header nil
+  "Determines if atx header style will be asymmetric.
+Set to a non-nil value to use asymmetric header styling, placing
+header markup only at the beginning of the line. By default,
+balanced markup will be inserted at the beginning and end of the
+line around the header title."
+  :group 'markdown
+  :type 'boolean)
+
+(defcustom markdown-indent-function 'markdown-indent-line
+  "Function to use to indent."
+  :group 'markdown
+  :type 'function)
+
+(defcustom markdown-indent-on-enter t
+  "Determines indentation behavior when pressing \\[newline].
+Possible settings are nil, t, and \\='indent-and-new-item.
+
+When non-nil, pressing \\[newline] will call `newline-and-indent'
+to indent the following line according to the context using
+`markdown-indent-function'.  In this case, note that
+\\[electric-newline-and-maybe-indent] can still be used to insert
+a newline without indentation.
+
+When set to \\='indent-and-new-item and the point is in a list item
+when \\[newline] is pressed, the list will be continued on the next
+line, where a new item will be inserted.
+
+When set to nil, simply call `newline' as usual.  In this case,
+you can still indent lines using \\[markdown-cycle] and continue
+lists with \\[markdown-insert-list-item].
+
+Note that this assumes the variable `electric-indent-mode' is
+non-nil (enabled).  When it is *disabled*, the behavior of
+\\[newline] and `\\[electric-newline-and-maybe-indent]' are
+reversed."
+  :group 'markdown
+  :type '(choice (const :tag "Don't automatically indent" nil)
+                 (const :tag "Automatically indent" t)
+                 (const :tag "Automatically indent and insert new list items" indent-and-new-item)))
+
+(defcustom markdown-enable-wiki-links nil
+  "Syntax highlighting for wiki links.
+Set this to a non-nil value to turn on wiki link support by default.
+Support can be toggled later using the `markdown-toggle-wiki-links'
+function or \\[markdown-toggle-wiki-links]."
+  :group 'markdown
+  :type 'boolean
+  :safe 'booleanp
+  :package-version '(markdown-mode . "2.2"))
+
+(defcustom markdown-wiki-link-alias-first t
+  "When non-nil, treat aliased wiki links like [[alias text|PageName]].
+Otherwise, they will be treated as [[PageName|alias text]]."
+  :group 'markdown
+  :type 'boolean
+  :safe 'booleanp)
+
+(defcustom markdown-wiki-link-search-subdirectories nil
+  "When non-nil, search for wiki link targets in subdirectories.
+This is the default search behavior for GitHub and is
+automatically set to t in `gfm-mode'."
+  :group 'markdown
+  :type 'boolean
+  :safe 'booleanp
+  :package-version '(markdown-mode . "2.2"))
+
+(defcustom markdown-wiki-link-search-parent-directories nil
+  "When non-nil, search for wiki link targets in parent directories.
+This is the default search behavior of Ikiwiki."
+  :group 'markdown
+  :type 'boolean
+  :safe 'booleanp
+  :package-version '(markdown-mode . "2.2"))
+
+(defcustom markdown-wiki-link-search-type nil
+  "Searching type for markdown wiki link.
+
+sub-directories: search for wiki link targets in sub directories
+parent-directories: search for wiki link targets in parent directories
+project: search for wiki link targets under project root"
+  :group 'markdown
+  :type '(set
+          (const :tag "search wiki link from subdirectories" sub-directories)
+          (const :tag "search wiki link from parent directories" parent-directories)
+          (const :tag "search wiki link under project root" project))
+  :package-version '(markdown-mode . "2.5"))
+
+(make-obsolete-variable 'markdown-wiki-link-search-subdirectories 'markdown-wiki-link-search-type "2.5")
+(make-obsolete-variable 'markdown-wiki-link-search-parent-directories 'markdown-wiki-link-search-type "2.5")
+
+(defcustom markdown-wiki-link-fontify-missing nil
+  "When non-nil, change wiki link face according to existence of target files.
+This is expensive because it requires checking for the file each time the buffer
+changes or the user switches windows.  It is disabled by default because it may
+cause lag when typing on slower machines."
+  :group 'markdown
+  :type 'boolean
+  :safe 'booleanp
+  :package-version '(markdown-mode . "2.2"))
+
+(defcustom markdown-uri-types
+  '("acap" "cid" "data" "dav" "fax" "file" "ftp"
+    "gopher" "http" "https" "imap" "ldap" "mailto"
+    "mid" "message" "modem" "news" "nfs" "nntp"
+    "pop" "prospero" "rtsp" "service" "sip" "tel"
+    "telnet" "tip" "urn" "vemmi" "wais")
+  "Link types for syntax highlighting of URIs."
+  :group 'markdown
+  :type '(repeat (string :tag "URI scheme")))
+
+(defcustom markdown-url-compose-char
+  '(?∞ ?… ?⋯ ?# ?★ ?⚓)
+  "Placeholder character for hidden URLs.
+This may be a single character or a list of characters. In case
+of a list, the first one that satisfies `char-displayable-p' will
+be used."
+  :type '(choice
+          (character :tag "Single URL replacement character")
+          (repeat :tag "List of possible URL replacement characters"
+                  character))
+  :package-version '(markdown-mode . "2.3"))
+
+(defcustom markdown-blockquote-display-char
+  '("▌" "┃" ">")
+  "String to display when hiding blockquote markup.
+This may be a single string or a list of string. In case of a
+list, the first one that satisfies `char-displayable-p' will be
+used."
+  :type 'string
+  :type '(choice
+          (string :tag "Single blockquote display string")
+          (repeat :tag "List of possible blockquote display strings" string))
+  :package-version '(markdown-mode . "2.3"))
+
+(defcustom markdown-hr-display-char
+  '(?─ ?━ ?-)
+  "Character for hiding horizontal rule markup.
+This may be a single character or a list of characters.  In case
+of a list, the first one that satisfies `char-displayable-p' will
+be used."
+  :group 'markdown
+  :type '(choice
+          (character :tag "Single HR display character")
+          (repeat :tag "List of possible HR display characters" character))
+  :package-version '(markdown-mode . "2.3"))
+
+(defcustom markdown-definition-display-char
+  '(?⁘ ?⁙ ?≡ ?⌑ ?◊ ?:)
+  "Character for replacing definition list markup.
+This may be a single character or a list of characters.  In case
+of a list, the first one that satisfies `char-displayable-p' will
+be used."
+  :type '(choice
+          (character :tag "Single definition list character")
+          (repeat :tag "List of possible definition list characters" character))
+  :package-version '(markdown-mode . "2.3"))
+
+(defcustom markdown-enable-math nil
+  "Syntax highlighting for inline LaTeX and itex expressions.
+Set this to a non-nil value to turn on math support by default.
+Math support can be enabled, disabled, or toggled later using
+`markdown-toggle-math' or \\[markdown-toggle-math]."
+  :group 'markdown
+  :type 'boolean
+  :safe 'booleanp)
+(make-variable-buffer-local 'markdown-enable-math)
+
+(defcustom markdown-enable-html t
+  "Enable font-lock support for HTML tags and attributes."
+  :group 'markdown
+  :type 'boolean
+  :safe 'booleanp
+  :package-version '(markdown-mode . "2.4"))
+
+(defcustom markdown-enable-highlighting-syntax nil
+  "Enable highlighting syntax."
+  :group 'markdown
+  :type 'boolean
+  :safe 'booleanp
+  :package-version '(markdown-mode . "2.5"))
+
+(defcustom markdown-css-paths nil
+  "List of URLs of CSS files to link to in the output XHTML."
+  :group 'markdown
+  :type '(repeat (string :tag "CSS File Path")))
+
+(defcustom markdown-content-type "text/html"
+  "Content type string for the http-equiv header in XHTML output.
+When set to an empty string, this attribute is omitted.  Defaults to
+`text/html'."
+  :group 'markdown
+  :type 'string)
+
+(defcustom markdown-coding-system nil
+  "Character set string for the http-equiv header in XHTML output.
+Defaults to `buffer-file-coding-system' (and falling back to
+`utf-8' when not available).  Common settings are `iso-8859-1'
+and `iso-latin-1'.  Use `list-coding-systems' for more choices."
+  :group 'markdown
+  :type 'coding-system)
+
+(defcustom markdown-export-kill-buffer t
+  "Kill output buffer after HTML export.
+When non-nil, kill the HTML output buffer after
+exporting with `markdown-export'."
+  :group 'markdown
+  :type 'boolean
+  :safe 'booleanp
+  :package-version '(markdown-mode . "2.4"))
+
+(defcustom markdown-xhtml-header-content ""
+  "Additional content to include in the XHTML <head> block."
+  :group 'markdown
+  :type 'string)
+
+(defcustom markdown-xhtml-body-preamble ""
+  "Content to include in the XHTML <body> block, before the output."
+  :group 'markdown
+  :type 'string
+  :safe 'stringp
+  :package-version '(markdown-mode . "2.4"))
+
+(defcustom markdown-xhtml-body-epilogue ""
+  "Content to include in the XHTML <body> block, after the output."
+  :group 'markdown
+  :type 'string
+  :safe 'stringp
+  :package-version '(markdown-mode . "2.4"))
+
+(defcustom markdown-xhtml-standalone-regexp
+  "^\\(<\\?xml\\|<!DOCTYPE\\|<html\\)"
+  "Regexp indicating whether `markdown-command' output is standalone XHTML."
+  :group 'markdown
+  :type 'regexp)
+
+(defcustom markdown-link-space-sub-char "_"
+  "Character to use instead of spaces when mapping wiki links to filenames."
+  :group 'markdown
+  :type 'string)
+
+(defcustom markdown-reference-location 'header
+  "Position where new reference definitions are inserted in the document."
+  :group 'markdown
+  :type '(choice (const :tag "At the end of the document" end)
+                 (const :tag "Immediately after the current block" immediately)
+                 (const :tag "At the end of the subtree" subtree)
+                 (const :tag "Before next header" header)))
+
+(defcustom markdown-footnote-location 'end
+  "Position where new footnotes are inserted in the document."
+  :group 'markdown
+  :type '(choice (const :tag "At the end of the document" end)
+                 (const :tag "Immediately after the current block" immediately)
+                 (const :tag "At the end of the subtree" subtree)
+                 (const :tag "Before next header" header)))
+
+(defcustom markdown-footnote-display '((raise 0.2) (height 0.8))
+  "Display specification for footnote markers and inline footnotes.
+By default, footnote text is reduced in size and raised.  Set to
+nil to disable this."
+  :group 'markdown
+  :type '(choice (sexp :tag "Display specification")
+                 (const :tag "Don't set display property" nil))
+  :package-version '(markdown-mode . "2.4"))
+
+(defcustom markdown-sub-superscript-display
+  '(((raise -0.3) (height 0.7)) . ((raise 0.3) (height 0.7)))
+  "Display specification for subscript and superscripts.
+The car is used for subscript, the cdr is used for superscripts."
+  :group 'markdown
+  :type '(cons (choice (sexp :tag "Subscript form")
+                       (const :tag "No lowering" nil))
+               (choice (sexp :tag "Superscript form")
+                       (const :tag "No raising" nil)))
+  :package-version '(markdown-mode . "2.4"))
+
+(defcustom markdown-unordered-list-item-prefix "  * "
+  "String inserted before unordered list items."
+  :group 'markdown
+  :type 'string)
+
+(defcustom markdown-ordered-list-enumeration t
+  "When non-nil, use enumerated numbers(1. 2. 3. etc.) for ordered list marker.
+While nil, always uses '1.' for the marker"
+  :group 'markdown
+  :type 'boolean
+  :package-version '(markdown-mode . "2.5"))
+
+(defcustom markdown-nested-imenu-heading-index t
+  "Use nested or flat imenu heading index.
+A nested index may provide more natural browsing from the menu,
+but a flat list may allow for faster keyboard navigation via tab
+completion."
+  :group 'markdown
+  :type 'boolean
+  :safe 'booleanp
+  :package-version '(markdown-mode . "2.2"))
+
+(defcustom markdown-add-footnotes-to-imenu t
+  "Add footnotes to end of imenu heading index."
+  :group 'markdown
+  :type 'boolean
+  :safe 'booleanp
+  :package-version '(markdown-mode . "2.4"))
+
+(defcustom markdown-make-gfm-checkboxes-buttons t
+  "When non-nil, make GFM checkboxes into buttons."
+  :group 'markdown
+  :type 'boolean)
+
+(defcustom markdown-use-pandoc-style-yaml-metadata nil
+  "When non-nil, allow YAML metadata anywhere in the document."
+  :group 'markdown
+  :type 'boolean)
+
+(defcustom markdown-split-window-direction 'any
+  "Preference for splitting windows for static and live preview.
+The default value is \\='any, which instructs Emacs to use
+`split-window-sensibly' to automatically choose how to split
+windows based on the values of `split-width-threshold' and
+`split-height-threshold' and the available windows.  To force
+vertically split (left and right) windows, set this to \\='vertical
+or \\='right.  To force horizontally split (top and bottom) windows,
+set this to \\='horizontal or \\='below.
+
+If this value is \\='any and `display-buffer-alist' is set then
+`display-buffer' is used for open buffer function"
+  :group 'markdown
+  :type '(choice (const :tag "Automatic" any)
+                 (const :tag "Right (vertical)" right)
+                 (const :tag "Below (horizontal)" below))
+  :package-version '(markdown-mode . "2.2"))
+
+(defcustom markdown-live-preview-window-function
+  #'markdown-live-preview-window-eww
+  "Function to display preview of Markdown output within Emacs.
+Function must update the buffer containing the preview and return
+the buffer."
+  :group 'markdown
+  :type 'function)
+
+(defcustom markdown-live-preview-delete-export 'delete-on-destroy
+  "Delete exported HTML file when using `markdown-live-preview-export'.
+If set to \\='delete-on-export, delete on every export. When set to
+\\='delete-on-destroy delete when quitting from command
+`markdown-live-preview-mode'. Never delete if set to nil."
+  :group 'markdown
+  :type '(choice
+          (const :tag "Delete on every export" delete-on-export)
+          (const :tag "Delete when quitting live preview" delete-on-destroy)
+          (const :tag "Never delete" nil)))
+
+(defcustom markdown-list-indent-width 4
+  "Depth of indentation for markdown lists.
+Used in `markdown-demote-list-item' and
+`markdown-promote-list-item'."
+  :group 'markdown
+  :type 'integer)
+
+(defcustom markdown-enable-prefix-prompts t
+  "Display prompts for certain prefix commands.
+Set to nil to disable these prompts."
+  :group 'markdown
+  :type 'boolean
+  :safe 'booleanp
+  :package-version '(markdown-mode . "2.3"))
+
+(defcustom markdown-gfm-additional-languages nil
+  "Extra languages made available when inserting GFM code blocks.
+Language strings must have be trimmed of whitespace and not
+contain any curly braces. They may be of arbitrary
+capitalization, though."
+  :group 'markdown
+  :type '(repeat (string :validate markdown-validate-language-string)))
+
+(defcustom markdown-gfm-use-electric-backquote t
+  "Use `markdown-electric-backquote' when backquote is hit three times."
+  :group 'markdown
+  :type 'boolean)
+
+(defcustom markdown-gfm-downcase-languages t
+  "If non-nil, downcase suggested languages.
+This applies to insertions done with
+`markdown-electric-backquote'."
+  :group 'markdown
+  :type 'boolean)
+
+(defcustom markdown-edit-code-block-default-mode 'normal-mode
+  "Default mode to use for editing code blocks.
+This mode is used when automatic detection fails, such as for GFM
+code blocks with no language specified."
+  :group 'markdown
+  :type '(choice function (const :tag "None" nil))
+  :package-version '(markdown-mode . "2.4"))
+
+(defcustom markdown-gfm-uppercase-checkbox nil
+  "If non-nil, use [X] for completed checkboxes, [x] otherwise."
+  :group 'markdown
+  :type 'boolean
+  :safe 'booleanp)
+
+(defcustom markdown-hide-urls nil
+  "Hide URLs of inline links and reference tags of reference links.
+Such URLs will be replaced by a single customizable
+character, defined by `markdown-url-compose-char', but are still part
+of the buffer.  Links can be edited interactively with
+\\[markdown-insert-link] or, for example, by deleting the final
+parenthesis to remove the invisibility property. You can also
+hover your mouse pointer over the link text to see the URL.
+Set this to a non-nil value to turn this feature on by default.
+You can interactively set the value of this variable by calling
+`markdown-toggle-url-hiding', pressing \\[markdown-toggle-url-hiding],
+or from the menu Markdown > Links & Images menu."
+  :group 'markdown
+  :type 'boolean
+  :safe 'booleanp
+  :package-version '(markdown-mode . "2.3"))
+(make-variable-buffer-local 'markdown-hide-urls)
+
+(defcustom markdown-translate-filename-function #'identity
+  "Function to use to translate filenames when following links.
+\\<markdown-mode-map>\\[markdown-follow-thing-at-point] and \\[markdown-follow-link-at-point]
+call this function with the filename as only argument whenever
+they encounter a filename (instead of a URL) to be visited and
+use its return value instead of the filename in the link.  For
+example, if absolute filenames are actually relative to a server
+root directory, you can set
+`markdown-translate-filename-function' to a function that
+prepends the root directory to the given filename."
+  :group 'markdown
+  :type 'function
+  :risky t
+  :package-version '(markdown-mode . "2.4"))
+
+(defcustom markdown-max-image-size nil
+  "Maximum width and height for displayed inline images.
+This variable may be nil or a cons cell (MAX-WIDTH . MAX-HEIGHT).
+When nil, use the actual size.  Otherwise, use ImageMagick to
+resize larger images to be of the given maximum dimensions.  This
+requires Emacs to be built with ImageMagick support."
+  :group 'markdown
+  :package-version '(markdown-mode . "2.4")
+  :type '(choice
+          (const :tag "Use actual image width" nil)
+          (cons (choice (sexp :tag "Maximum width in pixels")
+                        (const :tag "No maximum width" nil))
+                (choice (sexp :tag "Maximum height in pixels")
+                        (const :tag "No maximum height" nil)))))
+
+(defcustom markdown-mouse-follow-link t
+  "Non-nil means mouse on a link will follow the link.
+This variable must be set before loading markdown-mode."
+  :group 'markdown
+  :type 'boolean
+  :safe 'booleanp
+  :package-version '(markdown-mode . "2.5"))
+
+(defcustom markdown-table-align-p t
+  "Non-nil means that table is aligned after table operation."
+  :group 'markdown
+  :type 'boolean
+  :safe 'booleanp
+  :package-version '(markdown-mode . "2.5"))
+
+(defcustom markdown-fontify-whole-heading-line nil
+  "Non-nil means fontify the whole line for headings.
+This is useful when setting a background color for the
+markdown-header-face-* faces."
+  :group 'markdown
+  :type 'boolean
+  :safe 'booleanp
+  :package-version '(markdown-mode . "2.5"))
+
+
+;;; Markdown-Specific `rx' Macro ==============================================
+
+;; Based on python-rx from python.el.
+(eval-and-compile
+  (defconst markdown-rx-constituents
+    `((newline . ,(rx "\n"))
+      ;; Note: #405 not consider markdown-list-indent-width however this is never used
+      (indent . ,(rx (or (repeat 4 " ") "\t")))
+      (block-end . ,(rx (and (or (one-or-more (zero-or-more blank) "\n") line-end))))
+      (numeral . ,(rx (and (one-or-more (any "0-9#")) ".")))
+      (bullet . ,(rx (any "*+:-")))
+      (list-marker . ,(rx (or (and (one-or-more (any "0-9#")) ".")
+                              (any "*+:-"))))
+      (checkbox . ,(rx "[" (any " xX") "]")))
+    "Markdown-specific sexps for `markdown-rx'")
+
+  (defun markdown-rx-to-string (form &optional no-group)
+    "Markdown mode specialized `rx-to-string' function.
+This variant supports named Markdown expressions in FORM.
+NO-GROUP non-nil means don't put shy groups around the result."
+    (let ((rx-constituents (append markdown-rx-constituents rx-constituents)))
+      (rx-to-string form no-group)))
+
+  (defmacro markdown-rx (&rest regexps)
+    "Markdown mode specialized rx macro.
+This variant of `rx' supports common Markdown named REGEXPS."
+    (cond ((null regexps)
+           (error "No regexp"))
+          ((cdr regexps)
+           (markdown-rx-to-string `(and ,@regexps) t))
+          (t
+           (markdown-rx-to-string (car regexps) t)))))
+
+
+;;; Regular Expressions =======================================================
+
+(defconst markdown-regex-comment-start
+  "<!--"
+  "Regular expression matches HTML comment opening.")
+
+(defconst markdown-regex-comment-end
+  "--[ \t]*>"
+  "Regular expression matches HTML comment closing.")
+
+(defconst markdown-regex-link-inline
+  "\\(?1:!\\)?\\(?2:\\[\\)\\(?3:\\^?\\(?:\\\\\\]\\|[^]]\\)*\\|\\)\\(?4:\\]\\)\\(?5:(\\)\\s-*\\(?6:[^)]*?\\)\\(?:\\s-+\\(?7:\"[^\"]*\"\\)\\)?\\s-*\\(?8:)\\)"
+  "Regular expression for a [text](file) or an image link ![text](file).
+Group 1 matches the leading exclamation point (optional).
+Group 2 matches the opening square bracket.
+Group 3 matches the text inside the square brackets.
+Group 4 matches the closing square bracket.
+Group 5 matches the opening parenthesis.
+Group 6 matches the URL.
+Group 7 matches the title (optional).
+Group 8 matches the closing parenthesis.")
+
+(defconst markdown-regex-link-reference
+  "\\(?1:!\\)?\\(?2:\\[\\)\\(?3:[^]^][^]]*\\|\\)\\(?4:\\]\\)[ ]?\\(?5:\\[\\)\\(?6:[^]]*?\\)\\(?7:\\]\\)"
+  "Regular expression for a reference link [text][id].
+Group 1 matches the leading exclamation point (optional).
+Group 2 matches the opening square bracket for the link text.
+Group 3 matches the text inside the square brackets.
+Group 4 matches the closing square bracket for the link text.
+Group 5 matches the opening square bracket for the reference label.
+Group 6 matches the reference label.
+Group 7 matches the closing square bracket for the reference label.")
+
+(defconst markdown-regex-reference-definition
+  "^ \\{0,3\\}\\(?1:\\[\\)\\(?2:[^]\n]+?\\)\\(?3:\\]\\)\\(?4::\\)\\s *\\(?5:.*?\\)\\s *\\(?6: \"[^\"]*\"$\\|$\\)"
+  "Regular expression for a reference definition.
+Group 1 matches the opening square bracket.
+Group 2 matches the reference label.
+Group 3 matches the closing square bracket.
+Group 4 matches the colon.
+Group 5 matches the URL.
+Group 6 matches the title attribute (optional).")
+
+(defconst markdown-regex-footnote
+  "\\(?1:\\[\\^\\)\\(?2:.+?\\)\\(?3:\\]\\)"
+  "Regular expression for a footnote marker [^fn].
+Group 1 matches the opening square bracket and carat.
+Group 2 matches only the label, without the surrounding markup.
+Group 3 matches the closing square bracket.")
+
+(defconst markdown-regex-header
+  "^\\(?:\\(?1:[^\r\n\t -].*\\)\n\\(?:\\(?2:=+\\)\\|\\(?3:-+\\)\\)\\|\\(?4:#+[ \t]+\\)\\(?5:.*?\\)\\(?6:[ \t]*#*\\)\\)$"
+  "Regexp identifying Markdown headings.
+Group 1 matches the text of a setext heading.
+Group 2 matches the underline of a level-1 setext heading.
+Group 3 matches the underline of a level-2 setext heading.
+Group 4 matches the opening hash marks of an atx heading and whitespace.
+Group 5 matches the text, without surrounding whitespace, of an atx heading.
+Group 6 matches the closing whitespace and hash marks of an atx heading.")
+
+(defconst markdown-regex-header-setext
+  "^\\([^\r\n\t -].*\\)\n\\(=+\\|-+\\)$"
+  "Regular expression for generic setext-style (underline) headers.")
+
+(defconst markdown-regex-header-atx
+  "^\\(#+\\)[ \t]+\\(.*?\\)[ \t]*\\(#*\\)$"
+  "Regular expression for generic atx-style (hash mark) headers.")
+
+(defconst markdown-regex-hr
+  (rx line-start
+      (group (or (and (repeat 3 (and "*" (? " "))) (* (any "* ")))
+                 (and (repeat 3 (and "-" (? " "))) (* (any "- ")))
+                 (and (repeat 3 (and "_" (? " "))) (* (any "_ ")))))
+      line-end)
+  "Regular expression for matching Markdown horizontal rules.")
+
+(defconst markdown-regex-code
+  "\\(?:\\`\\|[^\\]\\)\\(?1:\\(?2:`+\\)\\(?3:\\(?:.\\|\n[^\n]\\)*?[^`]\\)\\(?4:\\2\\)\\)\\(?:[^`]\\|\\'\\)"
+  "Regular expression for matching inline code fragments.
+
+Group 1 matches the entire code fragment including the backquotes.
+Group 2 matches the opening backquotes.
+Group 3 matches the code fragment itself, without backquotes.
+Group 4 matches the closing backquotes.
+
+The leading, unnumbered group ensures that the leading backquote
+character is not escaped.
+The last group, also unnumbered, requires that the character
+following the code fragment is not a backquote.
+Note that \\(?:.\\|\n[^\n]\\) matches any character, including newlines,
+but not two newlines in a row.")
+
+(defconst markdown-regex-kbd
+  "\\(?1:<kbd>\\)\\(?2:\\(?:.\\|\n[^\n]\\)*?\\)\\(?3:</kbd>\\)"
+  "Regular expression for matching <kbd> tags.
+Groups 1 and 3 match the opening and closing tags.
+Group 2 matches the key sequence.")
+
+(defconst markdown-regex-gfm-code-block-open
+  "^[[:blank:]]*\\(?1:```\\)\\(?2:[[:blank:]]*{?[[:blank:]]*\\)\\(?3:[^`[:space:]]+?\\)?\\(?:[[:blank:]]+\\(?4:.+?\\)\\)?\\(?5:[[:blank:]]*}?[[:blank:]]*\\)$"
+  "Regular expression matching opening of GFM code blocks.
+Group 1 matches the opening three backquotes and any following whitespace.
+Group 2 matches the opening brace (optional) and surrounding whitespace.
+Group 3 matches the language identifier (optional).
+Group 4 matches the info string (optional).
+Group 5 matches the closing brace (optional), whitespace, and newline.
+Groups need to agree with `markdown-regex-tilde-fence-begin'.")
+
+(defconst markdown-regex-gfm-code-block-close
+  "^[[:blank:]]*\\(?1:```\\)\\(?2:\\s *?\\)$"
+  "Regular expression matching closing of GFM code blocks.
+Group 1 matches the closing three backquotes.
+Group 2 matches any whitespace and the final newline.")
+
+(defconst markdown-regex-pre
+  "^\\(    \\|\t\\).*$"
+  "Regular expression for matching preformatted text sections.")
+
+(defconst markdown-regex-list
+  (markdown-rx line-start
+               ;; 1. Leading whitespace
+               (group (* blank))
+               ;; 2. List marker: a numeral, bullet, or colon
+               (group list-marker)
+               ;; 3. Trailing whitespace
+               (group (+ blank))
+               ;; 4. Optional checkbox for GFM task list items
+               (opt (group (and checkbox (* blank)))))
+  "Regular expression for matching list items.")
+
+(defconst markdown-regex-bold
+  "\\(?1:^\\|[^\\]\\)\\(?2:\\(?3:\\*\\*\\|__\\)\\(?4:[^ \n\t\\]\\|[^ \n\t]\\(?:.\\|\n[^\n]\\)*?[^\\ ]\\)\\(?5:\\3\\)\\)"
+  "Regular expression for matching bold text.
+Group 1 matches the character before the opening asterisk or
+underscore, if any, ensuring that it is not a backslash escape.
+Group 2 matches the entire expression, including delimiters.
+Groups 3 and 5 matches the opening and closing delimiters.
+Group 4 matches the text inside the delimiters.")
+
+(defconst markdown-regex-italic
+  "\\(?:^\\|[^\\]\\)\\(?1:\\(?2:[*_]\\)\\(?3:[^ \n\t\\]\\|[^ \n\t*]\\(?:.\\|\n[^\n]\\)*?[^\\ ]\\)\\(?4:\\2\\)\\)"
+  "Regular expression for matching italic text.
+The leading unnumbered matches the character before the opening
+asterisk or underscore, if any, ensuring that it is not a
+backslash escape.
+Group 1 matches the entire expression, including delimiters.
+Groups 2 and 4 matches the opening and closing delimiters.
+Group 3 matches the text inside the delimiters.")
+
+(defconst markdown-regex-strike-through
+  "\\(?1:^\\|[^\\]\\)\\(?2:\\(?3:~~\\)\\(?4:[^ \n\t\\]\\|[^ \n\t]\\(?:.\\|\n[^\n]\\)*?[^\\ ]\\)\\(?5:~~\\)\\)"
+  "Regular expression for matching strike-through text.
+Group 1 matches the character before the opening tilde, if any,
+ensuring that it is not a backslash escape.
+Group 2 matches the entire expression, including delimiters.
+Groups 3 and 5 matches the opening and closing delimiters.
+Group 4 matches the text inside the delimiters.")
+
+(defconst markdown-regex-gfm-italic
+  "\\(?:^\\|[^\\]\\)\\(?1:\\(?2:[*_]\\)\\(?3:[^ \\]\\2\\|[^ ]\\(?:.\\|\n[^\n]\\)*?\\)\\(?4:\\2\\)\\)"
+  "Regular expression for matching italic text in GitHub Flavored Markdown.
+Underscores in words are not treated as special.
+Group 1 matches the entire expression, including delimiters.
+Groups 2 and 4 matches the opening and closing delimiters.
+Group 3 matches the text inside the delimiters.")
+
+(defconst markdown-regex-blockquote
+  "^[ \t]*\\(?1:[A-Z]?>\\)\\(?2:[ \t]*\\)\\(?3:.*\\)$"
+  "Regular expression for matching blockquote lines.
+Also accounts for a potential capital letter preceding the angle
+bracket, for use with Leanpub blocks (asides, warnings, info
+blocks, etc.).
+Group 1 matches the leading angle bracket.
+Group 2 matches the separating whitespace.
+Group 3 matches the text.")
+
+(defconst markdown-regex-line-break
+  "[^ \n\t][ \t]*\\(  \\)\n"
+  "Regular expression for matching line breaks.")
+
+(defconst markdown-regex-wiki-link
+  "\\(?:^\\|[^\\]\\)\\(?1:\\(?2:\\[\\[\\)\\(?3:[^]|]+\\)\\(?:\\(?4:|\\)\\(?5:[^]]+\\)\\)?\\(?6:\\]\\]\\)\\)"
+  "Regular expression for matching wiki links.
+This matches typical bracketed [[WikiLinks]] as well as \\='aliased
+wiki links of the form [[PageName|link text]].
+The meanings of the first and second components depend
+on the value of `markdown-wiki-link-alias-first'.
+
+Group 1 matches the entire link.
+Group 2 matches the opening square brackets.
+Group 3 matches the first component of the wiki link.
+Group 4 matches the pipe separator, when present.
+Group 5 matches the second component of the wiki link, when present.
+Group 6 matches the closing square brackets.")
+
+(defconst markdown-regex-uri
+  (concat "\\(" (regexp-opt markdown-uri-types) ":[^]\t\n\r<>; ]+\\)")
+  "Regular expression for matching inline URIs.")
+
+(defconst markdown-regex-angle-uri
+  (concat "\\(<\\)\\(" (regexp-opt markdown-uri-types) ":[^]\t\n\r<>,;()]+\\)\\(>\\)")
+  "Regular expression for matching inline URIs in angle brackets.")
+
+(defconst markdown-regex-email
+  "<\\(\\(?:\\sw\\|\\s_\\|\\s.\\)+@\\(?:\\sw\\|\\s_\\|\\s.\\)+\\)>"
+  "Regular expression for matching inline email addresses.")
+
+(defsubst markdown-make-regex-link-generic ()
+  "Make regular expression for matching any recognized link."
+  (concat "\\(?:" markdown-regex-link-inline
+          (when markdown-enable-wiki-links
+            (concat "\\|" markdown-regex-wiki-link))
+          "\\|" markdown-regex-link-reference
+          "\\|" markdown-regex-angle-uri "\\)"))
+
+(defconst markdown-regex-gfm-checkbox
+  " \\(\\[[ xX]\\]\\) "
+  "Regular expression for matching GFM checkboxes.
+Group 1 matches the text to become a button.")
+
+(defconst markdown-regex-blank-line
+  "^[[:blank:]]*$"
+  "Regular expression that matches a blank line.")
+
+(defconst markdown-regex-block-separator
+  "\n[\n\t\f ]*\n"
+  "Regular expression for matching block boundaries.")
+
+(defconst markdown-regex-block-separator-noindent
+  (concat "\\(\\`\\|\\(" markdown-regex-block-separator "\\)[^\n\t\f ]\\)")
+  "Regexp for block separators before lines with no indentation.")
+
+(defconst markdown-regex-math-inline-single
+  "\\(?:^\\|[^\\]\\)\\(?1:\\$\\)\\(?2:\\(?:[^\\$]\\|\\\\.\\)*\\)\\(?3:\\$\\)"
+  "Regular expression for itex $..$ math mode expressions.
+Groups 1 and 3 match the opening and closing dollar signs.
+Group 2 matches the mathematical expression contained within.")
+
+(defconst markdown-regex-math-inline-double
+  "\\(?:^\\|[^\\]\\)\\(?1:\\$\\$\\)\\(?2:\\(?:[^\\$]\\|\\\\.\\)*\\)\\(?3:\\$\\$\\)"
+  "Regular expression for itex $$..$$ math mode expressions.
+Groups 1 and 3 match opening and closing dollar signs.
+Group 2 matches the mathematical expression contained within.")
+
+(defconst markdown-regex-math-display
+  (rx line-start (* blank)
+      (group (group (repeat 1 2 "\\")) "[")
+      (group (*? anything))
+      (group (backref 2) "]")
+      line-end)
+  "Regular expression for \[..\] or \\[..\\] display math.
+Groups 1 and 4 match the opening and closing markup.
+Group 3 matches the mathematical expression contained within.
+Group 2 matches the opening slashes, and is used internally to
+match the closing slashes.")
+
+(defsubst markdown-make-tilde-fence-regex (num-tildes &optional end-of-line)
+  "Return regexp matching a tilde code fence at least NUM-TILDES long.
+END-OF-LINE is the regexp construct to indicate end of line; $ if
+missing."
+  (format "%s%d%s%s" "^[[:blank:]]*\\([~]\\{" num-tildes ",\\}\\)"
+          (or end-of-line "$")))
+
+(defconst markdown-regex-tilde-fence-begin
+  (markdown-make-tilde-fence-regex
+   3 "\\([[:blank:]]*{?\\)[[:blank:]]*\\([^[:space:]]+?\\)?\\(?:[[:blank:]]+\\(.+?\\)\\)?\\([[:blank:]]*}?[[:blank:]]*\\)$")
+  "Regular expression for matching tilde-fenced code blocks.
+Group 1 matches the opening tildes.
+Group 2 matches (optional) opening brace and surrounding whitespace.
+Group 3 matches the language identifier (optional).
+Group 4 matches the info string (optional).
+Group 5 matches the closing brace (optional) and any surrounding whitespace.
+Groups need to agree with `markdown-regex-gfm-code-block-open'.")
+
+(defconst markdown-regex-declarative-metadata
+  "^[ \t]*\\(?:-[ \t]*\\)?\\([[:alpha:]][[:alpha:] _-]*?\\)\\([:=][ \t]*\\)\\(.*\\)$"
+  "Regular expression for matching declarative metadata statements.
+This matches MultiMarkdown metadata as well as YAML and TOML
+assignments such as the following:
+
+    variable: value
+
+or
+
+    variable = value")
+
+(defconst markdown-regex-pandoc-metadata
+  "^\\(%\\)\\([ \t]*\\)\\(.*\\(?:\n[ \t]+.*\\)*\\)"
+  "Regular expression for matching Pandoc metadata.")
+
+(defconst markdown-regex-yaml-metadata-border
+  "\\(-\\{3\\}\\)$"
+  "Regular expression for matching YAML metadata.")
+
+(defconst markdown-regex-yaml-pandoc-metadata-end-border
+  "^\\(\\.\\{3\\}\\|\\-\\{3\\}\\)$"
+  "Regular expression for matching YAML metadata end borders.")
+
+(defsubst markdown-get-yaml-metadata-start-border ()
+  "Return YAML metadata start border depending upon whether Pandoc is used."
+  (concat
+   (if markdown-use-pandoc-style-yaml-metadata "^" "\\`")
+   markdown-regex-yaml-metadata-border))
+
+(defsubst markdown-get-yaml-metadata-end-border (_)
+  "Return YAML metadata end border depending upon whether Pandoc is used."
+  (if markdown-use-pandoc-style-yaml-metadata
+      markdown-regex-yaml-pandoc-metadata-end-border
+    markdown-regex-yaml-metadata-border))
+
+(defconst markdown-regex-inline-attributes
+  "[ \t]*\\(?:{:?\\)[ \t]*\\(?:\\(?:#[[:alpha:]_.:-]+\\|\\.[[:alpha:]_.:-]+\\|\\w+=['\"]?[^\n'\"}]*['\"]?\\),?[ \t]*\\)+\\(?:}\\)[ \t]*$"
+  "Regular expression for matching inline identifiers or attribute lists.
+Compatible with Pandoc, Python Markdown, PHP Markdown Extra, and Leanpub.")
+
+(defconst markdown-regex-leanpub-sections
+  (concat
+   "^\\({\\)\\("
+   (regexp-opt '("frontmatter" "mainmatter" "backmatter" "appendix" "pagebreak"))
+   "\\)\\(}\\)[ \t]*\n")
+  "Regular expression for Leanpub section markers and related syntax.")
+
+(defconst markdown-regex-sub-superscript
+  "\\(?:^\\|[^\\~^]\\)\\(?1:\\(?2:[~^]\\)\\(?3:[+-\u2212]?[[:alnum:]]+\\)\\(?4:\\2\\)\\)"
+  "The regular expression matching a sub- or superscript.
+The leading un-numbered group matches the character before the
+opening tilde or carat, if any, ensuring that it is not a
+backslash escape, carat, or tilde.
+Group 1 matches the entire expression, including markup.
+Group 2 matches the opening markup--a tilde or carat.
+Group 3 matches the text inside the delimiters.
+Group 4 matches the closing markup--a tilde or carat.")
+
+(defconst markdown-regex-include
+  "^\\(?1:<<\\)\\(?:\\(?2:\\[\\)\\(?3:.*\\)\\(?4:\\]\\)\\)?\\(?:\\(?5:(\\)\\(?6:.*\\)\\(?7:)\\)\\)?\\(?:\\(?8:{\\)\\(?9:.*\\)\\(?10:}\\)\\)?$"
+  "Regular expression matching common forms of include syntax.
+Marked 2, Leanpub, and other processors support some of these forms:
+
+<<[sections/section1.md]
+<<(folder/filename)
+<<[Code title](folder/filename)
+<<{folder/raw_file.html}
+
+Group 1 matches the opening two angle brackets.
+Groups 2-4 match the opening square bracket, the text inside,
+and the closing square bracket, respectively.
+Groups 5-7 match the opening parenthesis, the text inside, and
+the closing parenthesis.
+Groups 8-10 match the opening brace, the text inside, and the brace.")
+
+(defconst markdown-regex-pandoc-inline-footnote
+  "\\(?1:\\^\\)\\(?2:\\[\\)\\(?3:\\(?:.\\|\n[^\n]\\)*?\\)\\(?4:\\]\\)"
+  "Regular expression for Pandoc inline footnote^[footnote text].
+Group 1 matches the opening caret.
+Group 2 matches the opening square bracket.
+Group 3 matches the footnote text, without the surrounding markup.
+Group 4 matches the closing square bracket.")
+
+(defconst markdown-regex-html-attr
+  "\\(\\<[[:alpha:]:-]+\\>\\)\\(\\s-*\\(=\\)\\s-*\\(\".*?\"\\|'.*?'\\|[^'\">[:space:]]+\\)?\\)?"
+  "Regular expression for matching HTML attributes and values.
+Group 1 matches the attribute name.
+Group 2 matches the following whitespace, equals sign, and value, if any.
+Group 3 matches the equals sign, if any.
+Group 4 matches single-, double-, or un-quoted attribute values.")
+
+(defconst markdown-regex-html-tag
+  (concat "\\(</?\\)\\(\\w+\\)\\(\\(\\s-+" markdown-regex-html-attr
+          "\\)+\\s-*\\|\\s-*\\)\\(/?>\\)")
+  "Regular expression for matching HTML tags.
+Groups 1 and 9 match the beginning and ending angle brackets and slashes.
+Group 2 matches the tag name.
+Group 3 matches all attributes and whitespace following the tag name.")
+
+(defconst markdown-regex-html-entity
+  "\\(&#?[[:alnum:]]+;\\)"
+  "Regular expression for matching HTML entities.")
+
+(defconst markdown-regex-highlighting
+  "\\(?1:^\\|[^\\]\\)\\(?2:\\(?3:==\\)\\(?4:[^ \n\t\\]\\|[^ \n\t]\\(?:.\\|\n[^\n]\\)*?[^\\ ]\\)\\(?5:==\\)\\)"
+"Regular expression for matching highlighting text.
+Group 1 matches the character before the opening equal, if any,
+ensuring that it is not a backslash escape.
+Group 2 matches the entire expression, including delimiters.
+Groups 3 and 5 matches the opening and closing delimiters.
+Group 4 matches the text inside the delimiters.")
+
+
+;;; Syntax ====================================================================
+
+(defvar markdown--syntax-properties
+  (list 'markdown-tilde-fence-begin nil
+        'markdown-tilde-fence-end nil
+        'markdown-fenced-code nil
+        'markdown-yaml-metadata-begin nil
+        'markdown-yaml-metadata-end nil
+        'markdown-yaml-metadata-section nil
+        'markdown-gfm-block-begin nil
+        'markdown-gfm-block-end nil
+        'markdown-gfm-code nil
+        'markdown-list-item nil
+        'markdown-pre nil
+        'markdown-blockquote nil
+        'markdown-hr nil
+        'markdown-comment nil
+        'markdown-heading nil
+        'markdown-heading-1-setext nil
+        'markdown-heading-2-setext nil
+        'markdown-heading-1-atx nil
+        'markdown-heading-2-atx nil
+        'markdown-heading-3-atx nil
+        'markdown-heading-4-atx nil
+        'markdown-heading-5-atx nil
+        'markdown-heading-6-atx nil
+        'markdown-metadata-key nil
+        'markdown-metadata-value nil
+        'markdown-metadata-markup nil)
+  "Property list of all Markdown syntactic properties.")
+
+(defsubst markdown-in-comment-p (&optional pos)
+  "Return non-nil if POS is in a comment.
+If POS is not given, use point instead."
+  (get-text-property (or pos (point)) 'markdown-comment))
+
+(defun markdown--face-p (pos faces)
+  "Return non-nil if face of POS contain FACES."
+  (let ((face-prop (get-text-property pos 'face)))
+    (if (listp face-prop)
+        (cl-loop for face in face-prop
+                 thereis (memq face faces))
+      (memq face-prop faces))))
+
+(defun markdown-syntax-propertize-extend-region (start end)
+  "Extend START to END region to include an entire block of text.
+This helps improve syntax analysis for block constructs.
+Returns a cons (NEW-START . NEW-END) or nil if no adjustment should be made.
+Function is called repeatedly until it returns nil. For details, see
+`syntax-propertize-extend-region-functions'."
+  (save-match-data
+    (save-excursion
+      (let* ((new-start (progn (goto-char start)
+                               (skip-chars-forward "\n")
+                               (if (re-search-backward "\n\n" nil t)
+                                   (min start (match-end 0))
+                                 (point-min))))
+             (new-end (progn (goto-char end)
+                             (skip-chars-backward "\n")
+                             (if (re-search-forward "\n\n" nil t)
+                                 (max end (match-beginning 0))
+                               (point-max))))
+             (code-match (markdown-code-block-at-pos new-start))
+             ;; FIXME: The `code-match' can return bogus values
+             ;; when text has been inserted/deleted!
+             (new-start (min (or (and code-match (cl-first code-match))
+                                 (point-max))
+                             new-start))
+             (code-match (and (< end (point-max))
+                              (markdown-code-block-at-pos end)))
+             (new-end (max (or (and code-match (cl-second code-match)) 0)
+                           new-end)))
+
+        (unless (and (eq new-start start) (eq new-end end))
+          (cons new-start (min new-end (point-max))))))))
+
+(defun markdown-font-lock-extend-region-function (start end _)
+  "Used in `jit-lock-after-change-extend-region-functions'.
+Delegates to `markdown-syntax-propertize-extend-region'. START
+and END are the previous region to refontify."
+  (let ((res (markdown-syntax-propertize-extend-region start end)))
+    (when res
+      ;; syntax-propertize-function is not called when character at
+      ;; (point-max) is deleted, but font-lock-extend-region-functions
+      ;; are called.  Force a syntax property update in that case.
+      (when (= end (point-max))
+        ;; This function is called in a buffer modification hook.
+        ;; `markdown-syntax-propertize' doesn't save the match data,
+        ;; so we have to do it here.
+        (save-match-data
+          (markdown-syntax-propertize (car res) (cdr res))))
+      (setq jit-lock-start (car res)
+            jit-lock-end (cdr res)))))
+
+(defun markdown--cur-list-item-bounds ()
+  "Return a list describing the list item at point.
+Assumes that match data is set for `markdown-regex-list'.  See the
+documentation for `markdown-cur-list-item-bounds' for the format of
+the returned list."
+  (save-excursion
+    (let* ((begin (match-beginning 0))
+           (indent (length (match-string-no-properties 1)))
+           (nonlist-indent (- (match-end 3) (match-beginning 0)))
+           (marker (buffer-substring-no-properties
+                    (match-beginning 2) (match-end 3)))
+           (checkbox (match-string-no-properties 4))
+           (match (butlast (match-data t)))
+           (end (markdown-cur-list-item-end nonlist-indent)))
+      (list begin end indent nonlist-indent marker checkbox match))))
+
+(defun markdown--append-list-item-bounds (marker indent cur-bounds bounds)
+  "Update list item BOUNDS given list MARKER, block INDENT, and CUR-BOUNDS.
+Here, MARKER is a string representing the type of list and INDENT
+is an integer giving the indentation, in spaces, of the current
+block.  CUR-BOUNDS is a list of the form returned by
+`markdown-cur-list-item-bounds' and BOUNDS is a list of bounds
+values for parent list items.  When BOUNDS is nil, it means we are
+at baseline (not inside of a nested list)."
+  (let ((prev-indent (or (cl-third (car bounds)) 0)))
+    (cond
+     ;; New list item at baseline.
+     ((and marker (null bounds))
+      (list cur-bounds))
+     ;; List item with greater indentation (four or more spaces).
+     ;; Increase list level by consing CUR-BOUNDS onto BOUNDS.
+     ((and marker (>= indent (+ prev-indent markdown-list-indent-width)))
+      (cons cur-bounds bounds))
+     ;; List item with greater or equal indentation (less than four spaces).
+     ;; Keep list level the same by replacing the car of BOUNDS.
+     ((and marker (>= indent prev-indent))
+      (cons cur-bounds (cdr bounds)))
+     ;; Lesser indentation level.
+     ;; Pop appropriate number of elements off BOUNDS list (e.g., lesser
+     ;; indentation could move back more than one list level).  Note
+     ;; that this block need not be the beginning of list item.
+     ((< indent prev-indent)
+      (while (and (> (length bounds) 1)
+                  (setq prev-indent (cl-third (cadr bounds)))
+                  (< indent (+ prev-indent markdown-list-indent-width)))
+        (setq bounds (cdr bounds)))
+      (cons cur-bounds bounds))
+     ;; Otherwise, do nothing.
+     (t bounds))))
+
+(defun markdown-syntax-propertize-list-items (start end)
+  "Propertize list items from START to END.
+Stores nested list item information in the `markdown-list-item'
+text property to make later syntax analysis easier.  The value of
+this property is a list with elements of the form (begin . end)
+giving the bounds of the current and parent list items."
+  (save-excursion
+    (goto-char start)
+    (let ((prev-list-line -100)
+          bounds level pre-regexp)
+      ;; Find a baseline point with zero list indentation
+      (markdown-search-backward-baseline)
+      ;; Search for all list items between baseline and END
+      (while (and (< (point) end)
+                  (re-search-forward markdown-regex-list end 'limit))
+        ;; Level of list nesting
+        (setq level (length bounds))
+        ;; Pre blocks need to be indented one level past the list level
+        (setq pre-regexp (format "^\\(    \\|\t\\)\\{%d\\}" (1+ level)))
+        (beginning-of-line)
+        (cond
+         ;; Reset at headings, horizontal rules, and top-level blank lines.
+         ;; Propertize baseline when in range.
+         ((markdown-new-baseline)
+          (setq bounds nil))
+         ;; Make sure this is not a line from a pre block
+         ((and (looking-at-p pre-regexp)
+               ;; too indented line is also treated as list if previous line is list
+               (>= (- (line-number-at-pos) prev-list-line) 2)))
+         ;; If not, then update levels and propertize list item when in range.
+         (t
+          (let* ((indent (current-indentation))
+                 (cur-bounds (markdown--cur-list-item-bounds))
+                 (first (cl-first cur-bounds))
+                 (last (cl-second cur-bounds))
+                 (marker (cl-fifth cur-bounds)))
+            (setq bounds (markdown--append-list-item-bounds
+                          marker indent cur-bounds bounds))
+            (when (and (<= start (point)) (<= (point) end))
+              (setq prev-list-line (line-number-at-pos first))
+              (put-text-property first last 'markdown-list-item bounds)))))
+        (end-of-line)))))
+
+(defun markdown-syntax-propertize-pre-blocks (start end)
+  "Match preformatted text blocks from START to END."
+  (save-excursion
+    (goto-char start)
+    (let (finish)
+      ;; Use loop for avoiding too many recursive calls
+      ;; https://github.com/jrblevin/markdown-mode/issues/512
+      (while (not finish)
+        (let ((levels (markdown-calculate-list-levels))
+              indent pre-regexp close-regexp open close)
+          (while (and (< (point) end) (not close))
+            ;; Search for a region with sufficient indentation
+            (if (null levels)
+                (setq indent 1)
+              (setq indent (1+ (length levels))))
+            (setq pre-regexp (format "^\\(    \\|\t\\)\\{%d\\}" indent))
+            (setq close-regexp (format "^\\(    \\|\t\\)\\{0,%d\\}\\([^ \t]\\)" (1- indent)))
+
+            (cond
+             ;; If not at the beginning of a line, move forward
+             ((not (bolp)) (forward-line))
+             ;; Move past blank lines
+             ((markdown-cur-line-blank-p) (forward-line))
+             ;; At headers and horizontal rules, reset levels
+             ((markdown-new-baseline) (forward-line) (setq levels nil))
+             ;; If the current line has sufficient indentation, mark out pre block
+             ;; The opening should be preceded by a blank line.
+             ((and (markdown-prev-line-blank) (looking-at pre-regexp))
+              (setq open (match-beginning 0))
+              (while (and (or (looking-at-p pre-regexp) (markdown-cur-line-blank-p))
+                          (not (eobp)))
+                (forward-line))
+              (skip-syntax-backward "-")
+              (setq close (point)))
+             ;; If current line has a list marker, update levels, move to end of block
+             ((looking-at markdown-regex-list)
+              (setq levels (markdown-update-list-levels
+                            (match-string 2) (current-indentation) levels))
+              (markdown-end-of-text-block))
+             ;; If this is the end of the indentation level, adjust levels accordingly.
+             ;; Only match end of indentation level if levels is not the empty list.
+             ((and (car levels) (looking-at-p close-regexp))
+              (setq levels (markdown-update-list-levels
+                            nil (current-indentation) levels))
+              (markdown-end-of-text-block))
+             (t (markdown-end-of-text-block))))
+
+          (if (and open close)
+              ;; Set text property data and continue to search
+              (put-text-property open close 'markdown-pre (list open close))
+            (setq finish t))))
+      nil)))
+
+(defconst markdown-fenced-block-pairs
+  `(((,markdown-regex-tilde-fence-begin markdown-tilde-fence-begin)
+     (markdown-make-tilde-fence-regex markdown-tilde-fence-end)
+     markdown-fenced-code)
+    ((markdown-get-yaml-metadata-start-border markdown-yaml-metadata-begin)
+     (markdown-get-yaml-metadata-end-border markdown-yaml-metadata-end)
+     markdown-yaml-metadata-section)
+    ((,markdown-regex-gfm-code-block-open markdown-gfm-block-begin)
+     (,markdown-regex-gfm-code-block-close markdown-gfm-block-end)
+     markdown-gfm-code))
+  "Mapping of regular expressions to \"fenced-block\" constructs.
+These constructs are distinguished by having a distinctive start
+and end pattern, both of which take up an entire line of text,
+but no special pattern to identify text within the fenced
+blocks (unlike blockquotes and indented-code sections).
+
+Each element within this list takes the form:
+
+  ((START-REGEX-OR-FUN START-PROPERTY)
+   (END-REGEX-OR-FUN END-PROPERTY)
+   MIDDLE-PROPERTY)
+
+Each *-REGEX-OR-FUN element can be a regular expression as a string, or a
+function which evaluates to same. Functions for START-REGEX-OR-FUN accept no
+arguments, but functions for END-REGEX-OR-FUN accept a single numerical argument
+which is the length of the first group of the START-REGEX-OR-FUN match, which
+can be ignored if unnecessary. `markdown-maybe-funcall-regexp' is used to
+evaluate these into \"real\" regexps.
+
+The *-PROPERTY elements are the text properties applied to each part of the
+block construct when it is matched using
+`markdown-syntax-propertize-fenced-block-constructs'. START-PROPERTY is applied
+to the text matching START-REGEX-OR-FUN, END-PROPERTY to END-REGEX-OR-FUN, and
+MIDDLE-PROPERTY to the text in between the two. The value of *-PROPERTY is the
+`match-data' when the regexp was matched to the text. In the case of
+MIDDLE-PROPERTY, the value is a false match data of the form \\='(begin end), with
+begin and end set to the edges of the \"middle\" text. This makes fontification
+easier.")
+
+(defun markdown-text-property-at-point (prop)
+  (get-text-property (point) prop))
+
+(defsubst markdown-maybe-funcall-regexp (object &optional arg)
+  (cond ((functionp object)
+         (if arg (funcall object arg) (funcall object)))
+        ((stringp object) object)
+        (t (error "Object cannot be turned into regex"))))
+
+(defsubst markdown-get-start-fence-regexp ()
+  "Return regexp to find all \"start\" sections of fenced block constructs.
+Which construct is actually contained in the match must be found separately."
+  (mapconcat
+   #'identity
+   (mapcar (lambda (entry) (markdown-maybe-funcall-regexp (caar entry)))
+           markdown-fenced-block-pairs)
+   "\\|"))
+
+(defun markdown-get-fenced-block-begin-properties ()
+  (cl-mapcar (lambda (entry) (cl-cadar entry)) markdown-fenced-block-pairs))
+
+(defun markdown-get-fenced-block-end-properties ()
+  (cl-mapcar (lambda (entry) (cl-cadadr entry)) markdown-fenced-block-pairs))
+
+(defun markdown-get-fenced-block-middle-properties ()
+  (cl-mapcar #'cl-third markdown-fenced-block-pairs))
+
+(defun markdown-find-previous-prop (prop &optional lim)
+  "Find previous place where property PROP is non-nil, up to LIM.
+Return a cons of (pos . property). pos is point if point contains
+non-nil PROP."
+  (let ((res
+         (if (get-text-property (point) prop) (point)
+           (previous-single-property-change
+            (point) prop nil (or lim (point-min))))))
+    (when (and (not (get-text-property res prop))
+               (> res (point-min))
+               (get-text-property (1- res) prop))
+      (cl-decf res))
+    (when (and res (get-text-property res prop)) (cons res prop))))
+
+(defun markdown-find-next-prop (prop &optional lim)
+  "Find next place where property PROP is non-nil, up to LIM.
+Return a cons of (POS . PROPERTY) where POS is point if point
+contains non-nil PROP."
+  (let ((res
+         (if (get-text-property (point) prop) (point)
+           (next-single-property-change
+            (point) prop nil (or lim (point-max))))))
+    (when (and res (get-text-property res prop)) (cons res prop))))
+
+(defun markdown-min-of-seq (map-fn seq)
+  "Apply MAP-FN to SEQ and return element of SEQ with minimum value of MAP-FN."
+  (cl-loop for el in seq
+           with min = 1.0e+INF          ; infinity
+           with min-el = nil
+           do (let ((res (funcall map-fn el)))
+                (when (< res min)
+                  (setq min res)
+                  (setq min-el el)))
+           finally return min-el))
+
+(defun markdown-max-of-seq (map-fn seq)
+  "Apply MAP-FN to SEQ and return element of SEQ with maximum value of MAP-FN."
+  (cl-loop for el in seq
+           with max = -1.0e+INF          ; negative infinity
+           with max-el = nil
+           do (let ((res (funcall map-fn el)))
+                (when (and res (> res max))
+                  (setq max res)
+                  (setq max-el el)))
+           finally return max-el))
+
+(defun markdown-find-previous-block ()
+  "Find previous block.
+Detect whether `markdown-syntax-propertize-fenced-block-constructs' was
+unable to propertize the entire block, but was able to propertize the beginning
+of the block. If so, return a cons of (pos . property) where the beginning of
+the block was propertized."
+  (let ((start-pt (point))
+        (closest-open
+         (markdown-max-of-seq
+          #'car
+          (cl-remove-if
+           #'null
+           (cl-mapcar
+            #'markdown-find-previous-prop
+            (markdown-get-fenced-block-begin-properties))))))
+    (when closest-open
+      (let* ((length-of-open-match
+              (let ((match-d
+                     (get-text-property (car closest-open) (cdr closest-open))))
+                (- (cl-fourth match-d) (cl-third match-d))))
+             (end-regexp
+              (markdown-maybe-funcall-regexp
+               (cl-caadr
+                (cl-find-if
+                 (lambda (entry) (eq (cl-cadar entry) (cdr closest-open)))
+                 markdown-fenced-block-pairs))
+               length-of-open-match))
+             (end-prop-loc
+              (save-excursion
+                (save-match-data
+                  (goto-char (car closest-open))
+                  (and (re-search-forward end-regexp start-pt t)
+                       (match-beginning 0))))))
+        (and (not end-prop-loc) closest-open)))))
+
+(defun markdown-get-fenced-block-from-start (prop)
+  "Return limits of an enclosing fenced block from its start, using PROP.
+Return value is a list usable as `match-data'."
+  (catch 'no-rest-of-block
+    (let* ((correct-entry
+            (cl-find-if
+             (lambda (entry) (eq (cl-cadar entry) prop))
+             markdown-fenced-block-pairs))
+           (begin-of-begin (cl-first (markdown-text-property-at-point prop)))
+           (middle-prop (cl-third correct-entry))
+           (end-prop (cl-cadadr correct-entry))
+           (end-of-end
+            (save-excursion
+              (goto-char (match-end 0))   ; end of begin
+              (unless (eobp) (forward-char))
+              (let ((mid-prop-v (markdown-text-property-at-point middle-prop)))
+                (if (not mid-prop-v)    ; no middle
+                    (progn
+                      ;; try to find end by advancing one
+                      (let ((end-prop-v
+                             (markdown-text-property-at-point end-prop)))
+                        (if end-prop-v (cl-second end-prop-v)
+                          (throw 'no-rest-of-block nil))))
+                  (set-match-data mid-prop-v)
+                  (goto-char (match-end 0))   ; end of middle
+                  (beginning-of-line)         ; into end
+                  (cl-second (markdown-text-property-at-point end-prop)))))))
+      (list begin-of-begin end-of-end))))
+
+(defun markdown-get-fenced-block-from-middle (prop)
+  "Return limits of an enclosing fenced block from its middle, using PROP.
+Return value is a list usable as `match-data'."
+  (let* ((correct-entry
+          (cl-find-if
+           (lambda (entry) (eq (cl-third entry) prop))
+           markdown-fenced-block-pairs))
+         (begin-prop (cl-cadar correct-entry))
+         (begin-of-begin
+          (save-excursion
+            (goto-char (match-beginning 0))
+            (unless (bobp) (forward-line -1))
+            (beginning-of-line)
+            (cl-first (markdown-text-property-at-point begin-prop))))
+         (end-prop (cl-cadadr correct-entry))
+         (end-of-end
+          (save-excursion
+            (goto-char (match-end 0))
+            (beginning-of-line)
+            (cl-second (markdown-text-property-at-point end-prop)))))
+    (list begin-of-begin end-of-end)))
+
+(defun markdown-get-fenced-block-from-end (prop)
+  "Return limits of an enclosing fenced block from its end, using PROP.
+Return value is a list usable as `match-data'."
+  (let* ((correct-entry
+          (cl-find-if
+           (lambda (entry) (eq (cl-cadadr entry) prop))
+           markdown-fenced-block-pairs))
+         (end-of-end (cl-second (markdown-text-property-at-point prop)))
+         (middle-prop (cl-third correct-entry))
+         (begin-prop (cl-cadar correct-entry))
+         (begin-of-begin
+          (save-excursion
+            (goto-char (match-beginning 0)) ; beginning of end
+            (unless (bobp) (backward-char)) ; into middle
+            (let ((mid-prop-v (markdown-text-property-at-point middle-prop)))
+              (if (not mid-prop-v)
+                  (progn
+                    (beginning-of-line)
+                    (cl-first (markdown-text-property-at-point begin-prop)))
+                (set-match-data mid-prop-v)
+                (goto-char (match-beginning 0))   ; beginning of middle
+                (unless (bobp) (forward-line -1)) ; into beginning
+                (beginning-of-line)
+                (cl-first (markdown-text-property-at-point begin-prop)))))))
+    (list begin-of-begin end-of-end)))
+
+(defun markdown-get-enclosing-fenced-block-construct (&optional pos)
+  "Get \"fake\" match data for block enclosing POS.
+Returns fake match data which encloses the start, middle, and end
+of the block construct enclosing POS, if it exists. Used in
+`markdown-code-block-at-pos'."
+  (save-excursion
+    (when pos (goto-char pos))
+    (beginning-of-line)
+    (car
+     (cl-remove-if
+      #'null
+      (cl-mapcar
+       (lambda (fun-and-prop)
+         (cl-destructuring-bind (fun prop) fun-and-prop
+           (when prop
+             (save-match-data
+               (set-match-data (markdown-text-property-at-point prop))
+               (funcall fun prop)))))
+       `((markdown-get-fenced-block-from-start
+          ,(cl-find-if
+            #'markdown-text-property-at-point
+            (markdown-get-fenced-block-begin-properties)))
+         (markdown-get-fenced-block-from-middle
+          ,(cl-find-if
+            #'markdown-text-property-at-point
+            (markdown-get-fenced-block-middle-properties)))
+         (markdown-get-fenced-block-from-end
+          ,(cl-find-if
+            #'markdown-text-property-at-point
+            (markdown-get-fenced-block-end-properties)))))))))
+
+(defun markdown-propertize-end-match (reg end fence-spec middle-begin)
+  "Get match for REG up to END, if exists, and propertize appropriately.
+FENCE-SPEC is an entry in `markdown-fenced-block-pairs' and
+MIDDLE-BEGIN is the start of the \"middle\" section of the block."
+  (when (re-search-forward reg end t)
+    (let ((close-begin (match-beginning 0)) ; Start of closing line.
+          (close-end (match-end 0))         ; End of closing line.
+          (close-data (match-data t)))      ; Match data for closing line.
+      ;; Propertize middle section of fenced block.
+      (put-text-property middle-begin close-begin
+                         (cl-third fence-spec)
+                         (list middle-begin close-begin))
+      ;; If the block is a YAML block, propertize the declarations inside
+      (when (< middle-begin close-begin) ;; workaround #634
+        (markdown-syntax-propertize-yaml-metadata middle-begin close-begin))
+      ;; Propertize closing line of fenced block.
+      (put-text-property close-begin close-end
+                         (cl-cadadr fence-spec) close-data))))
+
+(defun markdown--triple-quote-single-line-p (begin)
+  (save-excursion
+    (goto-char begin)
+    (save-match-data
+      (and (search-forward "```" nil t)
+           (search-forward "```" (line-end-position) t)))))
+
+(defun markdown-syntax-propertize-fenced-block-constructs (start end)
+  "Propertize according to `markdown-fenced-block-pairs' from START to END.
+If unable to propertize an entire block (if the start of a block is within START
+and END, but the end of the block is not), propertize the start section of a
+block, then in a subsequent call propertize both middle and end by finding the
+start which was previously propertized."
+  (let ((start-reg (markdown-get-start-fence-regexp)))
+    (save-excursion
+      (goto-char start)
+      ;; start from previous unclosed block, if exists
+      (let ((prev-begin-block (markdown-find-previous-block)))
+        (when prev-begin-block
+          (let* ((correct-entry
+                  (cl-find-if (lambda (entry)
+                                (eq (cdr prev-begin-block) (cl-cadar entry)))
+                              markdown-fenced-block-pairs))
+                 (enclosed-text-start (1+ (car prev-begin-block)))
+                 (start-length
+                  (save-excursion
+                    (goto-char (car prev-begin-block))
+                    (string-match
+                     (markdown-maybe-funcall-regexp
+                      (caar correct-entry))
+                     (buffer-substring
+                      (line-beginning-position) (line-end-position)))
+                    (- (match-end 1) (match-beginning 1))))
+                 (end-reg (markdown-maybe-funcall-regexp
+                           (cl-caadr correct-entry) start-length)))
+            (markdown-propertize-end-match
+             end-reg end correct-entry enclosed-text-start))))
+      ;; find all new blocks within region
+      (while (re-search-forward start-reg end t)
+        ;; we assume the opening constructs take up (only) an entire line,
+        ;; so we re-check the current line
+        (let* ((block-start (match-beginning 0))
+               (cur-line (buffer-substring (line-beginning-position) (line-end-position)))
+               ;; find entry in `markdown-fenced-block-pairs' corresponding
+               ;; to regex which was matched
+               (correct-entry
+                (cl-find-if
+                 (lambda (fenced-pair)
+                   (string-match-p
+                    (markdown-maybe-funcall-regexp (caar fenced-pair))
+                    cur-line))
+                 markdown-fenced-block-pairs))
+               (enclosed-text-start
+                (save-excursion (1+ (line-end-position))))
+               (end-reg
+                (markdown-maybe-funcall-regexp
+                 (cl-caadr correct-entry)
+                 (if (and (match-beginning 1) (match-end 1))
+                     (- (match-end 1) (match-beginning 1))
+                   0)))
+               (prop (cl-cadar correct-entry)))
+          (when (or (not (eq prop 'markdown-gfm-block-begin))
+                    (not (markdown--triple-quote-single-line-p block-start)))
+            ;; get correct match data
+            (save-excursion
+              (beginning-of-line)
+              (re-search-forward
+               (markdown-maybe-funcall-regexp (caar correct-entry))
+               (line-end-position)))
+            ;; mark starting, even if ending is outside of region
+            (put-text-property (match-beginning 0) (match-end 0) prop (match-data t))
+            (markdown-propertize-end-match
+             end-reg end correct-entry enclosed-text-start)))))))
+
+(defun markdown-syntax-propertize-blockquotes (start end)
+  "Match blockquotes from START to END."
+  (save-excursion
+    (goto-char start)
+    (while (and (re-search-forward markdown-regex-blockquote end t)
+                (not (markdown-code-block-at-pos (match-beginning 0))))
+      (put-text-property (match-beginning 0) (match-end 0)
+                         'markdown-blockquote
+                         (match-data t)))))
+
+(defun markdown-syntax-propertize-hrs (start end)
+  "Match horizontal rules from START to END."
+  (save-excursion
+    (goto-char start)
+    (while (re-search-forward markdown-regex-hr end t)
+      (let ((beg (match-beginning 0))
+            (end (match-end 0)))
+        (goto-char beg)
+        (unless (or (markdown-on-heading-p)
+                    (markdown-code-block-at-point-p))
+          (put-text-property beg end 'markdown-hr (match-data t)))
+        (goto-char end)))))
+
+(defun markdown-syntax-propertize-yaml-metadata (start end)
+  "Propertize elements inside YAML metadata blocks from START to END.
+Assumes region from START and END is already known to be the interior
+region of a YAML metadata block as propertized by
+`markdown-syntax-propertize-fenced-block-constructs'."
+  (save-excursion
+    (goto-char start)
+    (cl-loop
+     while (re-search-forward markdown-regex-declarative-metadata end t)
+     do (progn
+          (put-text-property (match-beginning 1) (match-end 1)
+                             'markdown-metadata-key (match-data t))
+          (put-text-property (match-beginning 2) (match-end 2)
+                             'markdown-metadata-markup (match-data t))
+          (put-text-property (match-beginning 3) (match-end 3)
+                             'markdown-metadata-value (match-data t))))))
+
+(defun markdown-syntax-propertize-headings (start end)
+  "Match headings of type SYMBOL with REGEX from START to END."
+  (goto-char start)
+  (while (re-search-forward markdown-regex-header end t)
+    (unless (markdown-code-block-at-pos (match-beginning 0))
+      (put-text-property
+       (match-beginning 0) (match-end 0) 'markdown-heading
+       (match-data t))
+      (put-text-property
+       (match-beginning 0) (match-end 0)
+       (cond ((match-string-no-properties 2) 'markdown-heading-1-setext)
+             ((match-string-no-properties 3) 'markdown-heading-2-setext)
+             (t (let ((atx-level (length (markdown-trim-whitespace
+                                          (match-string-no-properties 4)))))
+                  (intern (format "markdown-heading-%d-atx" atx-level)))))
+       (match-data t)))))
+
+(defun markdown-syntax-propertize-comments (start end)
+  "Match HTML comments from the START to END."
+  ;; Implement by loop instead of recursive call for avoiding
+  ;; exceed max-lisp-eval-depth issue
+  ;; https://github.com/jrblevin/markdown-mode/issues/536
+  (let (finish)
+    (goto-char start)
+    (while (not finish)
+      (let* ((in-comment (nth 4 (syntax-ppss)))
+             (comment-begin (nth 8 (syntax-ppss))))
+        (cond
+         ;; Comment start
+         ((and (not in-comment)
+               (re-search-forward markdown-regex-comment-start end t)
+               (not (markdown-inline-code-at-point-p))
+               (not (markdown-code-block-at-point-p)))
+          (let ((open-beg (match-beginning 0)))
+            (put-text-property open-beg (1+ open-beg)
+                               'syntax-table (string-to-syntax "<"))
+            (goto-char (min (1+ (match-end 0)) end (point-max)))))
+         ;; Comment end
+         ((and in-comment comment-begin
+               (re-search-forward markdown-regex-comment-end end t))
+          (let ((comment-end (match-end 0)))
+            (put-text-property (1- comment-end) comment-end
+                               'syntax-table (string-to-syntax ">"))
+            ;; Remove any other text properties inside the comment
+            (remove-text-properties comment-begin comment-end
+                                    markdown--syntax-properties)
+            (put-text-property comment-begin comment-end
+                               'markdown-comment (list comment-begin comment-end))
+            (goto-char (min comment-end end (point-max)))))
+         ;; Nothing found
+         (t (setq finish t)))))
+    nil))
+
+(defun markdown-syntax-propertize (start end)
+  "Function used as `syntax-propertize-function'.
+START and END delimit region to propertize."
+  (with-silent-modifications
+    (save-excursion
+      (remove-text-properties start end markdown--syntax-properties)
+      (markdown-syntax-propertize-fenced-block-constructs start end)
+      (markdown-syntax-propertize-list-items start end)
+      (markdown-syntax-propertize-pre-blocks start end)
+      (markdown-syntax-propertize-blockquotes start end)
+      (markdown-syntax-propertize-headings start end)
+      (markdown-syntax-propertize-hrs start end)
+      (markdown-syntax-propertize-comments start end))))
+
+
+;;; Markup Hiding =============================================================
+
+(defconst markdown-markup-properties
+  '(face markdown-markup-face invisible markdown-markup)
+  "List of properties and values to apply to markup.")
+
+(defconst markdown-language-keyword-properties
+  '(face markdown-language-keyword-face invisible markdown-markup)
+  "List of properties and values to apply to code block language names.")
+
+(defconst markdown-language-info-properties
+  '(face markdown-language-info-face invisible markdown-markup)
+  "List of properties and values to apply to code block language info strings.")
+
+(defconst markdown-include-title-properties
+  '(face markdown-link-title-face invisible markdown-markup)
+  "List of properties and values to apply to included code titles.")
+
+(defcustom markdown-hide-markup nil
+  "Determines whether markup in the buffer will be hidden.
+When set to nil, all markup is displayed in the buffer as it
+appears in the file.  An exception is when `markdown-hide-urls'
+is non-nil.
+Set this to a non-nil value to turn this feature on by default.
+You can interactively toggle the value of this variable with
+`markdown-toggle-markup-hiding', \\[markdown-toggle-markup-hiding],
+or from the Markdown > Show & Hide menu.
+
+Markup hiding works by adding text properties to positions in the
+buffer---either the `invisible' property or the `display' property
+in cases where alternative glyphs are used (e.g., list bullets).
+This does not, however, affect printing or other output.
+Functions such as `htmlfontify-buffer' and `ps-print-buffer' will
+not honor these text properties.  For printing, it would be better
+to first convert to HTML or PDF (e.g,. using Pandoc)."
+  :group 'markdown
+  :type 'boolean
+  :safe 'booleanp
+  :package-version '(markdown-mode . "2.3"))
+(make-variable-buffer-local 'markdown-hide-markup)
+
+(defun markdown-toggle-markup-hiding (&optional arg)
+  "Toggle the display or hiding of markup.
+With a prefix argument ARG, enable markup hiding if ARG is positive,
+and disable it otherwise.
+See `markdown-hide-markup' for additional details."
+  (interactive (list (or current-prefix-arg 'toggle)))
+  (setq markdown-hide-markup
+        (if (eq arg 'toggle)
+            (not markdown-hide-markup)
+          (> (prefix-numeric-value arg) 0)))
+  (if markdown-hide-markup
+      (progn (add-to-invisibility-spec 'markdown-markup)
+             (message "markdown-mode markup hiding enabled"))
+    (progn (remove-from-invisibility-spec 'markdown-markup)
+           (message "markdown-mode markup hiding disabled")))
+  (markdown-reload-extensions))
+
+
+;;; Font Lock =================================================================
+
+(require 'font-lock)
+
+(defgroup markdown-faces nil
+  "Faces used in Markdown Mode."
+  :group 'markdown
+  :group 'faces)
+
+(defface markdown-italic-face
+  '((t (:inherit italic)))
+  "Face for italic text."
+  :group 'markdown-faces)
+
+(defface markdown-bold-face
+  '((t (:inherit bold)))
+  "Face for bold text."
+  :group 'markdown-faces)
+
+(defface markdown-strike-through-face
+  '((t (:strike-through t)))
+  "Face for strike-through text."
+  :group 'markdown-faces)
+
+(defface markdown-markup-face
+  '((t (:inherit shadow :slant normal :weight normal)))
+  "Face for markup elements."
+  :group 'markdown-faces)
+
+(defface markdown-header-rule-face
+  '((t (:inherit markdown-markup-face)))
+  "Base face for headers rules."
+  :group 'markdown-faces)
+
+(defface markdown-header-delimiter-face
+  '((t (:inherit markdown-markup-face)))
+  "Base face for headers hash delimiter."
+  :group 'markdown-faces)
+
+(defface markdown-list-face
+  '((t (:inherit markdown-markup-face)))
+  "Face for list item markers."
+  :group 'markdown-faces)
+
+(defface markdown-blockquote-face
+  '((t (:inherit font-lock-doc-face)))
+  "Face for blockquote sections."
+  :group 'markdown-faces)
+
+(defface markdown-code-face
+  '((t (:inherit fixed-pitch)))
+  "Face for inline code, pre blocks, and fenced code blocks.
+This may be used, for example, to add a contrasting background to
+inline code fragments and code blocks."
+  :group 'markdown-faces)
+
+(defface markdown-inline-code-face
+  '((t (:inherit (markdown-code-face font-lock-constant-face))))
+  "Face for inline code."
+  :group 'markdown-faces)
+
+(defface markdown-pre-face
+  '((t (:inherit (markdown-code-face font-lock-constant-face))))
+  "Face for preformatted text."
+  :group 'markdown-faces)
+
+(defface markdown-table-face
+  '((t (:inherit (markdown-code-face))))
+  "Face for tables."
+  :group 'markdown-faces)
+
+(defface markdown-language-keyword-face
+  '((t (:inherit font-lock-type-face)))
+  "Face for programming language identifiers."
+  :group 'markdown-faces)
+
+(defface markdown-language-info-face
+  '((t (:inherit font-lock-string-face)))
+  "Face for programming language info strings."
+  :group 'markdown-faces)
+
+(defface markdown-link-face
+  '((t (:inherit link)))
+  "Face for links."
+  :group 'markdown-faces)
+
+(defface markdown-missing-link-face
+  '((t (:inherit font-lock-warning-face)))
+  "Face for missing links."
+  :group 'markdown-faces)
+
+(defface markdown-reference-face
+  '((t (:inherit markdown-markup-face)))
+  "Face for link references."
+  :group 'markdown-faces)
+
+(defface markdown-footnote-marker-face
+  '((t (:inherit markdown-markup-face)))
+  "Face for footnote markers."
+  :group 'markdown-faces)
+
+(defface markdown-footnote-text-face
+  '((t (:inherit font-lock-comment-face)))
+  "Face for footnote text."
+  :group 'markdown-faces)
+
+(defface markdown-url-face
+  '((t (:inherit font-lock-string-face)))
+  "Face for URLs that are part of markup.
+For example, this applies to URLs in inline links:
+[link text](http://example.com/)."
+  :group 'markdown-faces)
+
+(defface markdown-plain-url-face
+  '((t (:inherit markdown-link-face)))
+  "Face for URLs that are also links.
+For example, this applies to plain angle bracket URLs:
+<http://example.com/>."
+  :group 'markdown-faces)
+
+(defface markdown-link-title-face
+  '((t (:inherit font-lock-comment-face)))
+  "Face for reference link titles."
+  :group 'markdown-faces)
+
+(defface markdown-line-break-face
+  '((t (:inherit font-lock-constant-face :underline t)))
+  "Face for hard line breaks."
+  :group 'markdown-faces)
+
+(defface markdown-comment-face
+  '((t (:inherit font-lock-comment-face)))
+  "Face for HTML comments."
+  :group 'markdown-faces)
+
+(defface markdown-math-face
+  '((t (:inherit font-lock-string-face)))
+  "Face for LaTeX expressions."
+  :group 'markdown-faces)
+
+(defface markdown-metadata-key-face
+  '((t (:inherit font-lock-variable-name-face)))
+  "Face for metadata keys."
+  :group 'markdown-faces)
+
+(defface markdown-metadata-value-face
+  '((t (:inherit font-lock-string-face)))
+  "Face for metadata values."
+  :group 'markdown-faces)
+
+(defface markdown-gfm-checkbox-face
+  '((t (:inherit font-lock-builtin-face)))
+  "Face for GFM checkboxes."
+  :group 'markdown-faces)
+
+(defface markdown-highlight-face
+  '((t (:inherit highlight)))
+  "Face for mouse highlighting."
+  :group 'markdown-faces)
+
+(defface markdown-hr-face
+  '((t (:inherit markdown-markup-face)))
+  "Face for horizontal rules."
+  :group 'markdown-faces)
+
+(defface markdown-html-tag-name-face
+  '((t (:inherit font-lock-type-face)))
+  "Face for HTML tag names."
+  :group 'markdown-faces)
+
+(defface markdown-html-tag-delimiter-face
+  '((t (:inherit markdown-markup-face)))
+  "Face for HTML tag delimiters."
+  :group 'markdown-faces)
+
+(defface markdown-html-attr-name-face
+  '((t (:inherit font-lock-variable-name-face)))
+  "Face for HTML attribute names."
+  :group 'markdown-faces)
+
+(defface markdown-html-attr-value-face
+  '((t (:inherit font-lock-string-face)))
+  "Face for HTML attribute values."
+  :group 'markdown-faces)
+
+(defface markdown-html-entity-face
+  '((t (:inherit font-lock-variable-name-face)))
+  "Face for HTML entities."
+  :group 'markdown-faces)
+
+(defface markdown-highlighting-face
+  '((t (:background "yellow" :foreground "black")))
+  "Face for highlighting."
+  :group 'markdown-faces)
+
+(defcustom markdown-header-scaling nil
+  "Whether to use variable-height faces for headers.
+When non-nil, `markdown-header-face' will inherit from
+`variable-pitch' and the scaling values in
+`markdown-header-scaling-values' will be applied to
+headers of levels one through six respectively."
+  :type 'boolean
+  :initialize #'custom-initialize-default
+  :set (lambda (symbol value)
+         (set-default symbol value)
+         (markdown-update-header-faces value))
+  :group 'markdown-faces
+  :package-version '(markdown-mode . "2.2"))
+
+(defcustom markdown-header-scaling-values
+  '(2.0 1.7 1.4 1.1 1.0 1.0)
+  "List of scaling values for headers of level one through six.
+Used when `markdown-header-scaling' is non-nil."
+  :type 'list
+  :initialize #'custom-initialize-default
+  :set (lambda (symbol value)
+         (set-default symbol value)
+         (markdown-update-header-faces markdown-header-scaling value)))
+
+(defmacro markdown--dotimes-when-compile (i-n body)
+  (declare (indent 1) (debug ((symbolp form) form)))
+  (let ((var (car i-n))
+        (n (cadr i-n))
+        (code ()))
+    (dotimes (i (eval n t))
+      (push (eval body `((,var . ,i))) code))
+    `(progn ,@(nreverse code))))
+
+(defface markdown-header-face
+  `((t (:inherit (,@(when markdown-header-scaling '(variable-pitch))
+                  font-lock-function-name-face)
+        :weight bold)))
+  "Base face for headers.")
+
+(markdown--dotimes-when-compile (num 6)
+  (let* ((num1 (1+ num))
+         (face-name (intern (format "markdown-header-face-%s" num1))))
+    `(defface ,face-name
+       (,'\` ((t (:inherit markdown-header-face
+                  :height
+                  (,'\, (if markdown-header-scaling
+                            (float (nth ,num markdown-header-scaling-values))
+                          1.0))))))
+       (format "Face for level %s headers.
+You probably don't want to customize this face directly. Instead
+you can customize the base face `markdown-header-face' or the
+variable-height variable `markdown-header-scaling'." ,num1))))
+
+(defun markdown-update-header-faces (&optional scaling scaling-values)
+  "Update header faces, depending on if header SCALING is desired.
+If so, use given list of SCALING-VALUES relative to the baseline
+size of `markdown-header-face'."
+  (dotimes (num 6)
+    (let* ((face-name (intern (format "markdown-header-face-%s" (1+ num))))
+           (scale (cond ((not scaling) 1.0)
+                        (scaling-values (float (nth num scaling-values)))
+                        (t (float (nth num markdown-header-scaling-values))))))
+      (unless (get face-name 'saved-face) ; Don't update customized faces
+        (set-face-attribute face-name nil :height scale)))))
+
+(defun markdown-syntactic-face (state)
+  "Return font-lock face for characters with given STATE.
+See `font-lock-syntactic-face-function' for details."
+  (let ((in-comment (nth 4 state)))
+    (cond
+     (in-comment 'markdown-comment-face)
+     (t nil))))
+
+(defcustom markdown-list-item-bullets
+  '("●" "◎" "○" "◆" "◇" "►" "•")
+  "List of bullets to use for unordered lists.
+It can contain any number of symbols, which will be repeated.
+Depending on your font, some reasonable choices are:
+♥ ● ◇ ✚ ✜ ☯ ◆ ♠ ♣ ♦ ❀ ◆ ◖ ▶ ► • ★ ▸."
+  :group 'markdown
+  :type '(repeat (string :tag "Bullet character"))
+  :package-version '(markdown-mode . "2.3"))
+
+(defun markdown--footnote-marker-properties ()
+  "Return a font-lock facespec expression for footnote marker text."
+  `(face markdown-footnote-marker-face
+         ,@(when markdown-hide-markup
+             `(display ,markdown-footnote-display))))
+
+(defun markdown--pandoc-inline-footnote-properties ()
+  "Return a font-lock facespec expression for Pandoc inline footnote text."
+  `(face markdown-footnote-text-face
+         ,@(when markdown-hide-markup
+             `(display ,markdown-footnote-display))))
+
+(defvar markdown-mode-font-lock-keywords
+  `((markdown-match-yaml-metadata-begin . ((1 'markdown-markup-face)))
+    (markdown-match-yaml-metadata-end . ((1 'markdown-markup-face)))
+    (markdown-match-yaml-metadata-key . ((1 'markdown-metadata-key-face)
+                                         (2 'markdown-markup-face)
+                                         (3 'markdown-metadata-value-face)))
+    (markdown-match-gfm-open-code-blocks . ((1 markdown-markup-properties)
+                                            (2 markdown-markup-properties nil t)
+                                            (3 markdown-language-keyword-properties nil t)
+                                            (4 markdown-language-info-properties nil t)
+                                            (5 markdown-markup-properties nil t)))
+    (markdown-match-gfm-close-code-blocks . ((0 markdown-markup-properties)))
+    (markdown-fontify-gfm-code-blocks)
+    (markdown-fontify-tables)
+    (markdown-match-fenced-start-code-block . ((1 markdown-markup-properties)
+                                               (2 markdown-markup-properties nil t)
+                                               (3 markdown-language-keyword-properties nil t)
+                                               (4 markdown-language-info-properties nil t)
+                                               (5 markdown-markup-properties nil t)))
+    (markdown-match-fenced-end-code-block . ((0 markdown-markup-properties)))
+    (markdown-fontify-fenced-code-blocks)
+    (markdown-match-pre-blocks . ((0 'markdown-pre-face)))
+    (markdown-fontify-headings)
+    (markdown-match-declarative-metadata . ((1 'markdown-metadata-key-face)
+                                            (2 'markdown-markup-face)
+                                            (3 'markdown-metadata-value-face)))
+    (markdown-match-pandoc-metadata . ((1 'markdown-markup-face)
+                                       (2 'markdown-markup-face)
+                                       (3 'markdown-metadata-value-face)))
+    (markdown-fontify-hrs)
+    (markdown-match-code . ((1 markdown-markup-properties prepend)
+                            (2 'markdown-inline-code-face prepend)
+                            (3 markdown-markup-properties prepend)))
+    (,markdown-regex-kbd . ((1 markdown-markup-properties)
+                            (2 'markdown-inline-code-face)
+                            (3 markdown-markup-properties)))
+    (markdown-fontify-angle-uris)
+    (,markdown-regex-email . 'markdown-plain-url-face)
+    (markdown-match-html-tag . ((1 'markdown-html-tag-delimiter-face t)
+                                (2 'markdown-html-tag-name-face t)
+                                (3 'markdown-html-tag-delimiter-face t)
+                                ;; Anchored matcher for HTML tag attributes
+                                (,markdown-regex-html-attr
+                                 ;; Before searching, move past tag
+                                 ;; name; set limit at tag close.
+                                 (progn
+                                   (goto-char (match-end 2)) (match-end 3))
+                                 nil
+                                 . ((1 'markdown-html-attr-name-face)
+                                    (3 'markdown-html-tag-delimiter-face nil t)
+                                    (4 'markdown-html-attr-value-face nil t)))))
+    (,markdown-regex-html-entity . 'markdown-html-entity-face)
+    (markdown-fontify-list-items)
+    (,markdown-regex-footnote . ((1 markdown-markup-properties)    ; [^
+                                 (2 (markdown--footnote-marker-properties)) ; label
+                                 (3 markdown-markup-properties)))  ; ]
+    (,markdown-regex-pandoc-inline-footnote . ((1 markdown-markup-properties)   ; ^
+                                               (2 markdown-markup-properties)   ; [
+                                               (3 (markdown--pandoc-inline-footnote-properties)) ; text
+                                               (4 markdown-markup-properties))) ; ]
+    (markdown-match-includes . ((1 markdown-markup-properties)
+                                (2 markdown-markup-properties nil t)
+                                (3 markdown-include-title-properties nil t)
+                                (4 markdown-markup-properties nil t)
+                                (5 markdown-markup-properties)
+                                (6 'markdown-url-face)
+                                (7 markdown-markup-properties)))
+    (markdown-fontify-inline-links)
+    (markdown-fontify-reference-links)
+    (,markdown-regex-reference-definition . ((1 'markdown-markup-face) ; [
+                                             (2 'markdown-reference-face) ; label
+                                             (3 'markdown-markup-face)    ; ]
+                                             (4 'markdown-markup-face)    ; :
+                                             (5 'markdown-url-face)       ; url
+                                             (6 'markdown-link-title-face))) ; "title" (optional)
+    (markdown-fontify-plain-uris)
+    ;; Math mode $..$
+    (markdown-match-math-single . ((1 'markdown-markup-face prepend)
+                                   (2 'markdown-math-face append)
+                                   (3 'markdown-markup-face prepend)))
+    ;; Math mode $$..$$
+    (markdown-match-math-double . ((1 'markdown-markup-face prepend)
+                                   (2 'markdown-math-face append)
+                                   (3 'markdown-markup-face prepend)))
+    ;; Math mode \[..\] and \\[..\\]
+    (markdown-match-math-display . ((1 'markdown-markup-face prepend)
+                                    (3 'markdown-math-face append)
+                                    (4 'markdown-markup-face prepend)))
+    (markdown-match-bold . ((1 markdown-markup-properties prepend)
+                            (2 'markdown-bold-face append)
+                            (3 markdown-markup-properties prepend)))
+    (markdown-match-italic . ((1 markdown-markup-properties prepend)
+                              (2 'markdown-italic-face append)
+                              (3 markdown-markup-properties prepend)))
+    (,markdown-regex-strike-through . ((3 markdown-markup-properties)
+                                       (4 'markdown-strike-through-face)
+                                       (5 markdown-markup-properties)))
+    (markdown--match-highlighting . ((3 markdown-markup-properties)
+                                     (4 'markdown-highlighting-face)
+                                     (5 markdown-markup-properties)))
+    (,markdown-regex-line-break . (1 'markdown-line-break-face prepend))
+    (markdown-fontify-sub-superscripts)
+    (markdown-match-inline-attributes . ((0 markdown-markup-properties prepend)))
+    (markdown-match-leanpub-sections . ((0 markdown-markup-properties)))
+    (markdown-fontify-blockquotes)
+    (markdown-match-wiki-link . ((0 'markdown-link-face prepend))))
+  "Syntax highlighting for Markdown files.")
+
+;; Footnotes
+(defvar-local markdown-footnote-counter 0
+  "Counter for footnote numbers.")
+
+(defconst markdown-footnote-chars
+  "[[:alnum:]-]"
+  "Regular expression matching any character for a footnote identifier.")
+
+(defconst markdown-regex-footnote-definition
+  (concat "^ \\{0,3\\}\\[\\(\\^" markdown-footnote-chars "*?\\)\\]:\\(?:[ \t]+\\|$\\)")
+  "Regular expression matching a footnote definition, capturing the label.")
+
+
+;;; Compatibility =============================================================
+
+(defun markdown--pandoc-reference-p ()
+  (let ((bounds (bounds-of-thing-at-point 'word)))
+    (when (and bounds (char-before (car bounds)))
+      (= (char-before (car bounds)) ?@))))
+
+(defun markdown-flyspell-check-word-p ()
+  "Return t if `flyspell' should check word just before point.
+Used for `flyspell-generic-check-word-predicate'."
+  (save-excursion
+    (goto-char (1- (point)))
+    ;; https://github.com/jrblevin/markdown-mode/issues/560
+    ;; enable spell check YAML meta data
+    (if (or (and (markdown-code-block-at-point-p)
+                 (not (markdown-text-property-at-point 'markdown-yaml-metadata-section)))
+            (markdown-inline-code-at-point-p)
+            (markdown-in-comment-p)
+            (markdown--face-p (point) '(markdown-reference-face
+                                        markdown-markup-face
+                                        markdown-plain-url-face
+                                        markdown-inline-code-face
+                                        markdown-url-face))
+            (markdown--pandoc-reference-p))
+        (prog1 nil
+          ;; If flyspell overlay is put, then remove it
+          (let ((bounds (bounds-of-thing-at-point 'word)))
+            (when bounds
+              (cl-loop for ov in (overlays-in (car bounds) (cdr bounds))
+                       when (overlay-get ov 'flyspell-overlay)
+                       do
+                       (delete-overlay ov)))))
+      t)))
+
+
+;;; Markdown Parsing Functions ================================================
+
+(defun markdown-cur-line-blank-p ()
+  "Return t if the current line is blank and nil otherwise."
+  (save-excursion
+    (beginning-of-line)
+    (looking-at-p markdown-regex-blank-line)))
+
+(defun markdown-prev-line-blank ()
+  "Return t if the previous line is blank and nil otherwise.
+If we are at the first line, then consider the previous line to be blank."
+  (or (= (line-beginning-position) (point-min))
+      (save-excursion
+        (forward-line -1)
+        (looking-at markdown-regex-blank-line))))
+
+(defun markdown-prev-line-blank-p ()
+  "Like `markdown-prev-line-blank', but preserve `match-data'."
+  (save-match-data (markdown-prev-line-blank)))
+
+(defun markdown-next-line-blank-p ()
+  "Return t if the next line is blank and nil otherwise.
+If we are at the last line, then consider the next line to be blank."
+  (or (= (line-end-position) (point-max))
+      (save-excursion
+        (forward-line 1)
+        (markdown-cur-line-blank-p))))
+
+(defun markdown-prev-line-indent ()
+  "Return the number of leading whitespace characters in the previous line.
+Return 0 if the current line is the first line in the buffer."
+  (save-excursion
+    (if (= (line-beginning-position) (point-min))
+        0
+      (forward-line -1)
+      (current-indentation))))
+
+(defun markdown-next-line-indent ()
+  "Return the number of leading whitespace characters in the next line.
+Return 0 if line is the last line in the buffer."
+  (save-excursion
+    (if (= (line-end-position) (point-max))
+        0
+      (forward-line 1)
+      (current-indentation))))
+
+(defun markdown-new-baseline ()
+  "Determine if the current line begins a new baseline level.
+Assume point is positioned at beginning of line."
+  (or (looking-at markdown-regex-header)
+      (looking-at markdown-regex-hr)
+      (and (= (current-indentation) 0)
+           (not (looking-at markdown-regex-list))
+           (markdown-prev-line-blank))))
+
+(defun markdown-search-backward-baseline ()
+  "Search backward baseline point with no indentation and not a list item."
+  (end-of-line)
+  (let (stop)
+    (while (not (or stop (bobp)))
+      (re-search-backward markdown-regex-block-separator-noindent nil t)
+      (when (match-end 2)
+        (goto-char (match-end 2))
+        (cond
+         ((markdown-new-baseline)
+          (setq stop t))
+         ((looking-at-p markdown-regex-list)
+          (setq stop nil))
+         (t (setq stop t)))))))
+
+(defun markdown-update-list-levels (marker indent levels)
+  "Update list levels given list MARKER, block INDENT, and current LEVELS.
+Here, MARKER is a string representing the type of list, INDENT is an integer
+giving the indentation, in spaces, of the current block, and LEVELS is a
+list of the indentation levels of parent list items.  When LEVELS is nil,
+it means we are at baseline (not inside of a nested list)."
+  (cond
+   ;; New list item at baseline.
+   ((and marker (null levels))
+    (setq levels (list indent)))
+   ;; List item with greater indentation (four or more spaces).
+   ;; Increase list level.
+   ((and marker (>= indent (+ (car levels) markdown-list-indent-width)))
+    (setq levels (cons indent levels)))
+   ;; List item with greater or equal indentation (less than four spaces).
+   ;; Do not increase list level.
+   ((and marker (>= indent (car levels)))
+    levels)
+   ;; Lesser indentation level.
+   ;; Pop appropriate number of elements off LEVELS list (e.g., lesser
+   ;; indentation could move back more than one list level).  Note
+   ;; that this block need not be the beginning of list item.
+   ((< indent (car levels))
+    (while (and (> (length levels) 1)
+                (< indent (+ (cadr levels) markdown-list-indent-width)))
+      (setq levels (cdr levels)))
+    levels)
+   ;; Otherwise, do nothing.
+   (t levels)))
+
+(defun markdown-calculate-list-levels ()
+  "Calculate list levels at point.
+Return a list of the form (n1 n2 n3 ...) where n1 is the
+indentation of the deepest nested list item in the branch of
+the list at the point, n2 is the indentation of the parent
+list item, and so on.  The depth of the list item is therefore
+the length of the returned list.  If the point is not at or
+immediately  after a list item, return nil."
+  (save-excursion
+    (let ((first (point)) levels indent pre-regexp)
+      ;; Find a baseline point with zero list indentation
+      (markdown-search-backward-baseline)
+      ;; Search for all list items between baseline and LOC
+      (while (and (< (point) first)
+                  (re-search-forward markdown-regex-list first t))
+        (setq pre-regexp (format "^\\(    \\|\t\\)\\{%d\\}" (1+ (length levels))))
+        (beginning-of-line)
+        (cond
+         ;; Make sure this is not a header or hr
+         ((markdown-new-baseline) (setq levels nil))
+         ;; Make sure this is not a line from a pre block
+         ((looking-at-p pre-regexp))
+         ;; If not, then update levels
+         (t
+          (setq indent (current-indentation))
+          (setq levels (markdown-update-list-levels (match-string 2)
+                                                    indent levels))))
+        (end-of-line))
+      levels)))
+
+(defun markdown-prev-list-item (level)
+  "Search backward from point for a list item with indentation LEVEL.
+Set point to the beginning of the item, and return point, or nil
+upon failure."
+  (let (bounds indent prev)
+    (setq prev (point))
+    (forward-line -1)
+    (setq indent (current-indentation))
+    (while
+        (cond
+         ;; List item
+         ((and (looking-at-p markdown-regex-list)
+               (setq bounds (markdown-cur-list-item-bounds)))
+          (cond
+           ;; Stop and return point at item of equal indentation
+           ((= (nth 3 bounds) level)
+            (setq prev (point))
+            nil)
+           ;; Stop and return nil at item with lesser indentation
+           ((< (nth 3 bounds) level)
+            (setq prev nil)
+            nil)
+           ;; Stop at beginning of buffer
+           ((bobp) (setq prev nil))
+           ;; Continue at item with greater indentation
+           ((> (nth 3 bounds) level) t)))
+         ;; Stop at beginning of buffer
+         ((bobp) (setq prev nil))
+         ;; Continue if current line is blank
+         ((markdown-cur-line-blank-p) t)
+         ;; Continue while indentation is the same or greater
+         ((>= indent level) t)
+         ;; Stop if current indentation is less than list item
+         ;; and the next is blank
+         ((and (< indent level)
+               (markdown-next-line-blank-p))
+          (setq prev nil))
+         ;; Stop at a header
+         ((looking-at-p markdown-regex-header) (setq prev nil))
+         ;; Stop at a horizontal rule
+         ((looking-at-p markdown-regex-hr) (setq prev nil))
+         ;; Otherwise, continue.
+         (t t))
+      (forward-line -1)
+      (setq indent (current-indentation)))
+    prev))
+
+(defun markdown-next-list-item (level)
+  "Search forward from point for the next list item with indentation LEVEL.
+Set point to the beginning of the item, and return point, or nil
+upon failure."
+  (let (bounds indent next)
+    (setq next (point))
+    (if (looking-at markdown-regex-header-setext)
+        (goto-char (match-end 0)))
+    (forward-line)
+    (setq indent (current-indentation))
+    (while
+        (cond
+         ;; Stop at end of the buffer.
+         ((eobp) nil)
+         ;; Continue if the current line is blank
+         ((markdown-cur-line-blank-p) t)
+         ;; List item
+         ((and (looking-at-p markdown-regex-list)
+               (setq bounds (markdown-cur-list-item-bounds)))
+          (cond
+           ;; Continue at item with greater indentation
+           ((> (nth 3 bounds) level) t)
+           ;; Stop and return point at item of equal indentation
+           ((= (nth 3 bounds) level)
+            (setq next (point))
+            nil)
+           ;; Stop and return nil at item with lesser indentation
+           ((< (nth 3 bounds) level)
+            (setq next nil)
+            nil)))
+         ;; Continue while indentation is the same or greater
+         ((>= indent level) t)
+         ;; Stop if current indentation is less than list item
+         ;; and the previous line was blank.
+         ((and (< indent level)
+               (markdown-prev-line-blank-p))
+          (setq next nil))
+         ;; Stop at a header
+         ((looking-at-p markdown-regex-header) (setq next nil))
+         ;; Stop at a horizontal rule
+         ((looking-at-p markdown-regex-hr) (setq next nil))
+         ;; Otherwise, continue.
+         (t t))
+      (forward-line)
+      (setq indent (current-indentation)))
+    next))
+
+(defun markdown-cur-list-item-end (level)
+  "Move to end of list item with pre-marker indentation LEVEL.
+Return the point at the end when a list item was found at the
+original point.  If the point is not in a list item, do nothing."
+  (let (indent)
+    (forward-line)
+    (setq indent (current-indentation))
+    (while
+        (cond
+         ;; Stop at end of the buffer.
+         ((eobp) nil)
+         ;; Continue while indentation is the same or greater
+         ((>= indent level) t)
+         ;; Continue if the current line is blank
+         ((looking-at markdown-regex-blank-line) t)
+         ;; Stop if current indentation is less than list item
+         ;; and the previous line was blank.
+         ((and (< indent level)
+               (markdown-prev-line-blank))
+          nil)
+         ;; Stop at a new list items of the same or lesser
+         ;; indentation, headings, and horizontal rules.
+         ((looking-at (concat "\\(?:" markdown-regex-list
+                              "\\|" markdown-regex-header
+                              "\\|" markdown-regex-hr "\\)"))
+          nil)
+         ;; Otherwise, continue.
+         (t t))
+      (forward-line)
+      (setq indent (current-indentation)))
+    ;; Don't skip over whitespace for empty list items (marker and
+    ;; whitespace only), just move to end of whitespace.
+    (if (save-excursion
+          (beginning-of-line)
+          (looking-at (concat markdown-regex-list "[ \t]*$")))
+        (goto-char (match-end 3))
+      (skip-chars-backward " \t\n"))
+    (end-of-line)
+    (point)))
+
+(defun markdown-cur-list-item-bounds ()
+  "Return bounds for list item at point.
+Return a list of the following form:
+
+    (begin end indent nonlist-indent marker checkbox match)
+
+The named components are:
+
+  - begin: Position of beginning of list item, including leading indentation.
+  - end: Position of the end of the list item, including list item text.
+  - indent: Number of characters of indentation before list marker (an integer).
+  - nonlist-indent: Number characters of indentation, list
+    marker, and whitespace following list marker (an integer).
+  - marker: String containing the list marker and following whitespace
+            (e.g., \"- \" or \"* \").
+  - checkbox: String containing the GFM checkbox portion, if any,
+    including any trailing whitespace before the text
+    begins (e.g., \"[x] \").
+  - match: match data for markdown-regex-list
+
+As an example, for the following unordered list item
+
+   - item
+
+the returned list would be
+
+    (1 14 3 5 \"- \" nil (1 6 1 4 4 5 5 6))
+
+If the point is not inside a list item, return nil."
+  (car (get-text-property (line-beginning-position) 'markdown-list-item)))
+
+(defun markdown-list-item-at-point-p ()
+  "Return t if there is a list item at the point and nil otherwise."
+  (save-match-data (markdown-cur-list-item-bounds)))
+
+(defun markdown-prev-list-item-bounds ()
+  "Return bounds of previous item in the same list of any level.
+The return value has the same form as that of
+`markdown-cur-list-item-bounds'."
+  (save-excursion
+    (let ((cur-bounds (markdown-cur-list-item-bounds))
+          (beginning-of-list (save-excursion (markdown-beginning-of-list)))
+          stop)
+      (when cur-bounds
+        (goto-char (nth 0 cur-bounds))
+        (while (and (not stop) (not (bobp))
+                    (re-search-backward markdown-regex-list
+                                        beginning-of-list t))
+          (unless (or (looking-at markdown-regex-hr)
+                      (markdown-code-block-at-point-p))
+            (setq stop (point))))
+        (markdown-cur-list-item-bounds)))))
+
+(defun markdown-next-list-item-bounds ()
+  "Return bounds of next item in the same list of any level.
+The return value has the same form as that of
+`markdown-cur-list-item-bounds'."
+  (save-excursion
+    (let ((cur-bounds (markdown-cur-list-item-bounds))
+          (end-of-list (save-excursion (markdown-end-of-list)))
+          stop)
+      (when cur-bounds
+        (goto-char (nth 0 cur-bounds))
+        (end-of-line)
+        (while (and (not stop) (not (eobp))
+                    (re-search-forward markdown-regex-list
+                                       end-of-list t))
+          (unless (or (looking-at markdown-regex-hr)
+                      (markdown-code-block-at-point-p))
+            (setq stop (point))))
+        (when stop
+          (markdown-cur-list-item-bounds))))))
+
+(defun markdown-beginning-of-list ()
+  "Move point to beginning of list at point, if any."
+  (interactive)
+  (let ((orig-point (point))
+        (list-begin (save-excursion
+                      (markdown-search-backward-baseline)
+                      ;; Stop at next list item, regardless of the indentation.
+                      (markdown-next-list-item (point-max))
+                      (when (looking-at markdown-regex-list)
+                        (point)))))
+    (when (and list-begin (<= list-begin orig-point))
+      (goto-char list-begin))))
+
+(defun markdown-end-of-list ()
+  "Move point to end of list at point, if any."
+  (interactive)
+  (let ((start (point))
+        (end (save-excursion
+               (when (markdown-beginning-of-list)
+                 ;; Items can't have nonlist-indent <= 1, so this
+                 ;; moves past all list items.
+                 (markdown-next-list-item 1)
+                 (skip-syntax-backward "-")
+                 (unless (eobp) (forward-char 1))
+                 (point)))))
+    (when (and end (>= end start))
+      (goto-char end))))
+
+(defun markdown-up-list ()
+  "Move point to beginning of parent list item."
+  (interactive)
+  (let ((cur-bounds (markdown-cur-list-item-bounds)))
+    (when cur-bounds
+      (markdown-prev-list-item (1- (nth 3 cur-bounds)))
+      (let ((up-bounds (markdown-cur-list-item-bounds)))
+        (when (and up-bounds (< (nth 3 up-bounds) (nth 3 cur-bounds)))
+          (point))))))
+
+(defun markdown-bounds-of-thing-at-point (thing)
+  "Call `bounds-of-thing-at-point' for THING with slight modifications.
+Does not include trailing newlines when THING is \\='line.  Handles the
+end of buffer case by setting both endpoints equal to the value of
+`point-max', since an empty region will trigger empty markup insertion.
+Return bounds of form (beg . end) if THING is found, or nil otherwise."
+  (let* ((bounds (bounds-of-thing-at-point thing))
+         (a (car bounds))
+         (b (cdr bounds)))
+    (when bounds
+      (when (eq thing 'line)
+        (cond ((and (eobp) (markdown-cur-line-blank-p))
+               (setq a b))
+              ((char-equal (char-before b) ?\^J)
+               (setq b (1- b)))))
+      (cons a b))))
+
+(defun markdown-reference-definition (reference)
+  "Find out whether Markdown REFERENCE is defined.
+REFERENCE should not include the square brackets.
+When REFERENCE is defined, return a list of the form (text start end)
+containing the definition text itself followed by the start and end
+locations of the text.  Otherwise, return nil.
+Leave match data for `markdown-regex-reference-definition'
+intact additional processing."
+  (let ((reference (downcase reference)))
+    (save-excursion
+      (goto-char (point-min))
+      (catch 'found
+        (while (re-search-forward markdown-regex-reference-definition nil t)
+          (when (string= reference (downcase (match-string-no-properties 2)))
+            (throw 'found
+                   (list (match-string-no-properties 5)
+                         (match-beginning 5) (match-end 5)))))))))
+
+(defun markdown-get-defined-references ()
+  "Return all defined reference labels and their line numbers.
+They does not include square brackets)."
+  (save-excursion
+    (goto-char (point-min))
+    (let (refs)
+      (while (re-search-forward markdown-regex-reference-definition nil t)
+        (let ((target (match-string-no-properties 2)))
+          (cl-pushnew
+           (cons (downcase target)
+                 (markdown-line-number-at-pos (match-beginning 2)))
+           refs :test #'equal :key #'car)))
+      (reverse refs))))
+
+(defun markdown-get-used-uris ()
+  "Return a list of all used URIs in the buffer."
+  (save-excursion
+    (goto-char (point-min))
+    (let (uris)
+      (while (re-search-forward
+              (concat "\\(?:" markdown-regex-link-inline
+                      "\\|" markdown-regex-angle-uri
+                      "\\|" markdown-regex-uri
+                      "\\|" markdown-regex-email
+                      "\\)")
+              nil t)
+        (unless (or (markdown-inline-code-at-point-p)
+                    (markdown-code-block-at-point-p))
+          (cl-pushnew (or (match-string-no-properties 6)
+                          (match-string-no-properties 10)
+                          (match-string-no-properties 12)
+                          (match-string-no-properties 13))
+                      uris :test #'equal)))
+      (reverse uris))))
+
+(defun markdown-inline-code-at-pos (pos)
+  "Return non-nil if there is an inline code fragment at POS.
+Return nil otherwise.  Set match data according to
+`markdown-match-code' upon success.
+This function searches the block for a code fragment that
+contains the point using `markdown-match-code'.  We do this
+because `thing-at-point-looking-at' does not work reliably with
+`markdown-regex-code'.
+
+The match data is set as follows:
+Group 1 matches the opening backquotes.
+Group 2 matches the code fragment itself, without backquotes.
+Group 3 matches the closing backquotes."
+  (save-excursion
+    (goto-char pos)
+    (let ((old-point (point))
+          (end-of-block (progn (markdown-end-of-text-block) (point)))
+          found)
+      (markdown-beginning-of-text-block)
+      (while (and (markdown-match-code end-of-block)
+                  (setq found t)
+                  (< (match-end 0) old-point)))
+      (let ((match-group (if (eq (char-after (match-beginning 0)) ?`) 0 1)))
+        (and found                                        ; matched something
+             (<= (match-beginning match-group) old-point) ; match contains old-point
+             (> (match-end 0) old-point))))))
+
+(defun markdown-inline-code-at-pos-p (pos)
+  "Return non-nil if there is an inline code fragment at POS.
+Like `markdown-inline-code-at-pos`, but preserves match data."
+  (save-match-data (markdown-inline-code-at-pos pos)))
+
+(defun markdown-inline-code-at-point ()
+  "Return non-nil if the point is at an inline code fragment.
+See `markdown-inline-code-at-pos' for details."
+  (markdown-inline-code-at-pos (point)))
+
+(defun markdown-inline-code-at-point-p (&optional pos)
+  "Return non-nil if there is inline code at the POS.
+This is a predicate function counterpart to
+`markdown-inline-code-at-point' which does not modify the match
+data.  See `markdown-code-block-at-point-p' for code blocks."
+  (save-match-data (markdown-inline-code-at-pos (or pos (point)))))
+
+(defun markdown-code-block-at-pos (pos)
+  "Return match data list if there is a code block at POS.
+Uses text properties at the beginning of the line position.
+This includes pre blocks, tilde-fenced code blocks, and GFM
+quoted code blocks.  Return nil otherwise."
+  (let ((bol (save-excursion (goto-char pos) (line-beginning-position))))
+    (or (get-text-property bol 'markdown-pre)
+        (let* ((bounds (markdown-get-enclosing-fenced-block-construct pos))
+               (second (cl-second bounds)))
+          (if second
+              ;; chunks are right open
+              (when (< pos second)
+                bounds)
+            bounds)))))
+
+;; Function was renamed to emphasize that it does not modify match-data.
+(defalias 'markdown-code-block-at-point 'markdown-code-block-at-point-p)
+
+(defun markdown-code-block-at-point-p (&optional pos)
+  "Return non-nil if there is a code block at the POS.
+This includes pre blocks, tilde-fenced code blocks, and GFM
+quoted code blocks.  This function does not modify the match
+data.  See `markdown-inline-code-at-point-p' for inline code."
+  (save-match-data (markdown-code-block-at-pos (or pos (point)))))
+
+(defun markdown-heading-at-point (&optional pos)
+  "Return non-nil if there is a heading at the POS.
+Set match data for `markdown-regex-header'."
+  (let ((match-data (get-text-property (or pos (point)) 'markdown-heading)))
+    (when match-data
+      (set-match-data match-data)
+      t)))
+
+(defun markdown-pipe-at-bol-p ()
+  "Return non-nil if the line begins with a pipe symbol.
+This may be useful for tables and Pandoc's line_blocks extension."
+  (char-equal (char-after (line-beginning-position)) ?|))
+
+
+;;; Markdown Font Lock Matching Functions =====================================
+
+(defun markdown-range-property-any (begin end prop prop-values)
+  "Return t if PROP from BEGIN to END is equal to one of the given PROP-VALUES.
+Also returns t if PROP is a list containing one of the PROP-VALUES.
+Return nil otherwise."
+  (let (props)
+    (catch 'found
+      (dolist (loc (number-sequence begin end))
+        (when (setq props (get-text-property loc prop))
+          (cond ((listp props)
+                 ;; props is a list, check for membership
+                 (dolist (val prop-values)
+                   (when (memq val props) (throw 'found loc))))
+                (t
+                 ;; props is a scalar, check for equality
+                 (dolist (val prop-values)
+                   (when (eq val props) (throw 'found loc))))))))))
+
+(defun markdown-range-properties-exist (begin end props)
+  (cl-loop
+   for loc in (number-sequence begin end)
+   with result = nil
+   while (not
+          (setq result
+                (cl-some (lambda (prop) (get-text-property loc prop)) props)))
+   finally return result))
+
+(defun markdown-match-inline-generic (regex last &optional faceless)
+  "Match inline REGEX from the point to LAST.
+When FACELESS is non-nil, do not return matches where faces have been applied."
+  (when (re-search-forward regex last t)
+    (let ((bounds (markdown-code-block-at-pos (match-beginning 1)))
+          (face (and faceless (text-property-not-all
+                               (match-beginning 0) (match-end 0) 'face nil))))
+      (cond
+       ;; In code block: move past it and recursively search again
+       (bounds
+        (when (< (goto-char (cl-second bounds)) last)
+          (markdown-match-inline-generic regex last faceless)))
+       ;; When faces are found in the match range, skip over the match and
+       ;; recursively search again.
+       (face
+        (when (< (goto-char (match-end 0)) last)
+          (markdown-match-inline-generic regex last faceless)))
+       ;; Keep match data and return t when in bounds.
+       (t
+        (<= (match-end 0) last))))))
+
+(defun markdown-match-code (last)
+  "Match inline code fragments from point to LAST."
+  (unless (bobp)
+    (backward-char 1))
+  (when (markdown-search-until-condition
+         (lambda ()
+           (and
+            ;; Advance point in case of failure, but without exceeding last.
+            (goto-char (min (1+ (match-beginning 1)) last))
+            (not (markdown-in-comment-p (match-beginning 1)))
+            (not (markdown-in-comment-p (match-end 1)))
+            (not (markdown-code-block-at-pos (match-beginning 1)))))
+         markdown-regex-code last t)
+    (set-match-data (list (match-beginning 1) (match-end 1)
+                          (match-beginning 2) (match-end 2)
+                          (match-beginning 3) (match-end 3)
+                          (match-beginning 4) (match-end 4)))
+    (goto-char (min (1+ (match-end 0)) last (point-max)))
+    t))
+
+(defun markdown--gfm-markup-underscore-p (begin end)
+  (let ((is-underscore (eql (char-after begin) ?_)))
+    (if (not is-underscore)
+        t
+      (save-excursion
+        (save-match-data
+          (goto-char begin)
+          (and (looking-back "\\(?:^\\|[[:blank:][:punct:]]\\)" (1- begin))
+               (progn
+                 (goto-char end)
+                 (looking-at-p "\\(?:[[:blank:][:punct:]]\\|$\\)"))))))))
+
+(defun markdown-match-bold (last)
+  "Match inline bold from the point to LAST."
+  (when (markdown-match-inline-generic markdown-regex-bold last)
+    (let ((is-gfm (derived-mode-p 'gfm-mode))
+          (begin (match-beginning 2))
+          (end (match-end 2)))
+      (if (or (markdown-inline-code-at-pos-p begin)
+              (markdown-inline-code-at-pos-p end)
+              (markdown-in-comment-p)
+              (markdown-range-property-any
+               begin begin 'face '(markdown-url-face
+                                   markdown-plain-url-face))
+              (markdown-range-property-any
+               begin end 'face '(markdown-hr-face
+                                 markdown-math-face))
+              (and is-gfm (not (markdown--gfm-markup-underscore-p begin end))))
+          (progn (goto-char (min (1+ begin) last))
+                 (when (< (point) last)
+                   (markdown-match-bold last)))
+        (set-match-data (list (match-beginning 2) (match-end 2)
+                              (match-beginning 3) (match-end 3)
+                              (match-beginning 4) (match-end 4)
+                              (match-beginning 5) (match-end 5)))
+        t))))
+
+(defun markdown-match-italic (last)
+  "Match inline italics from the point to LAST."
+  (let* ((is-gfm (derived-mode-p 'gfm-mode))
+         (regex (if is-gfm
+                    markdown-regex-gfm-italic
+                  markdown-regex-italic)))
+    (when (and (markdown-match-inline-generic regex last)
+               (not (markdown--face-p
+                     (match-beginning 1)
+                     '(markdown-html-attr-name-face markdown-html-attr-value-face))))
+      (let ((begin (match-beginning 1))
+            (end (match-end 1))
+            (close-end (match-end 4)))
+        (if (or (eql (char-before begin) (char-after begin))
+                (markdown-inline-code-at-pos-p begin)
+                (markdown-inline-code-at-pos-p (1- end))
+                (markdown-in-comment-p)
+                (markdown-range-property-any
+                 begin begin 'face '(markdown-url-face
+                                     markdown-plain-url-face))
+                (markdown-range-property-any
+                 begin end 'face '(markdown-bold-face
+                                   markdown-list-face
+                                   markdown-hr-face
+                                   markdown-math-face))
+                (and is-gfm
+                     (or (char-equal (char-after begin) (char-after (1+ begin))) ;; check bold case
+                         (not (markdown--gfm-markup-underscore-p begin close-end)))))
+            (progn (goto-char (min (1+ begin) last))
+                   (when (< (point) last)
+                     (markdown-match-italic last)))
+          (set-match-data (list (match-beginning 1) (match-end 1)
+                                (match-beginning 2) (match-end 2)
+                                (match-beginning 3) (match-end 3)
+                                (match-beginning 4) (match-end 4)))
+          t)))))
+
+(defun markdown--match-highlighting (last)
+  (when markdown-enable-highlighting-syntax
+    (re-search-forward markdown-regex-highlighting last t)))
+
+(defun markdown-match-math-generic (regex last)
+  "Match REGEX from point to LAST.
+REGEX is either `markdown-regex-math-inline-single' for matching
+$..$ or `markdown-regex-math-inline-double' for matching $$..$$."
+  (when (markdown-match-inline-generic regex last)
+    (let ((begin (match-beginning 1)) (end (match-end 1)))
+      (prog1
+          (if (or (markdown-range-property-any
+                   begin end 'face
+                   '(markdown-inline-code-face markdown-bold-face))
+                  (markdown-range-properties-exist
+                   begin end
+                   (markdown-get-fenced-block-middle-properties)))
+              (markdown-match-math-generic regex last)
+            t)
+        (goto-char (1+ (match-end 0)))))))
+
+(defun markdown-match-list-items (last)
+  "Match list items from point to LAST."
+  (let* ((first (point))
+         (pos first)
+         (prop 'markdown-list-item)
+         (bounds (car (get-text-property pos prop))))
+    (while
+        (and (or (null (setq bounds (car (get-text-property pos prop))))
+                 (< (cl-first bounds) pos))
+             (< (point) last)
+             (setq pos (next-single-property-change pos prop nil last))
+             (goto-char pos)))
+    (when bounds
+      (set-match-data (cl-seventh bounds))
+      ;; Step at least one character beyond point. Otherwise
+      ;; `font-lock-fontify-keywords-region' infloops.
+      (goto-char (min (1+ (max (line-end-position) first))
+                      (point-max)))
+      t)))
+
+(defun markdown-match-math-single (last)
+  "Match single quoted $..$ math from point to LAST."
+  (when markdown-enable-math
+    (when (and (char-equal (char-after) ?$)
+               (not (bolp))
+               (not (char-equal (char-before) ?\\))
+               (not (char-equal (char-before) ?$)))
+      (forward-char -1))
+    (markdown-match-math-generic markdown-regex-math-inline-single last)))
+
+(defun markdown-match-math-double (last)
+  "Match double quoted $$..$$ math from point to LAST."
+  (when markdown-enable-math
+    (when (and (< (1+ (point)) (point-max))
+               (char-equal (char-after) ?$)
+               (char-equal (char-after (1+ (point))) ?$)
+               (not (bolp))
+               (not (char-equal (char-before) ?\\))
+               (not (char-equal (char-before) ?$)))
+      (forward-char -1))
+    (markdown-match-math-generic markdown-regex-math-inline-double last)))
+
+(defun markdown-match-math-display (last)
+  "Match bracketed display math \[..\] and \\[..\\] from point to LAST."
+  (when markdown-enable-math
+    (markdown-match-math-generic markdown-regex-math-display last)))
+
+(defun markdown-match-propertized-text (property last)
+  "Match text with PROPERTY from point to LAST.
+Restore match data previously stored in PROPERTY."
+  (let ((saved (get-text-property (point) property))
+        pos)
+    (unless saved
+      (setq pos (next-single-property-change (point) property nil last))
+      (unless (= pos last)
+        (setq saved (get-text-property pos property))))
+    (when saved
+      (set-match-data saved)
+      ;; Step at least one character beyond point. Otherwise
+      ;; `font-lock-fontify-keywords-region' infloops.
+      (goto-char (min (1+ (max (match-end 0) (point)))
+                      (point-max)))
+      saved)))
+
+(defun markdown-match-pre-blocks (last)
+  "Match preformatted blocks from point to LAST.
+Use data stored in \\='markdown-pre text property during syntax
+analysis."
+  (markdown-match-propertized-text 'markdown-pre last))
+
+(defun markdown-match-gfm-code-blocks (last)
+  "Match GFM quoted code blocks from point to LAST.
+Use data stored in \\='markdown-gfm-code text property during syntax
+analysis."
+  (markdown-match-propertized-text 'markdown-gfm-code last))
+
+(defun markdown-match-gfm-open-code-blocks (last)
+  (markdown-match-propertized-text 'markdown-gfm-block-begin last))
+
+(defun markdown-match-gfm-close-code-blocks (last)
+  (markdown-match-propertized-text 'markdown-gfm-block-end last))
+
+(defun markdown-match-fenced-code-blocks (last)
+  "Match fenced code blocks from the point to LAST."
+  (markdown-match-propertized-text 'markdown-fenced-code last))
+
+(defun markdown-match-fenced-start-code-block (last)
+  (markdown-match-propertized-text 'markdown-tilde-fence-begin last))
+
+(defun markdown-match-fenced-end-code-block (last)
+  (markdown-match-propertized-text 'markdown-tilde-fence-end last))
+
+(defun markdown-match-blockquotes (last)
+  "Match blockquotes from point to LAST.
+Use data stored in \\='markdown-blockquote text property during syntax
+analysis."
+  (markdown-match-propertized-text 'markdown-blockquote last))
+
+(defun markdown-match-hr (last)
+  "Match horizontal rules comments from the point to LAST."
+  (markdown-match-propertized-text 'markdown-hr last))
+
+(defun markdown-match-comments (last)
+  "Match HTML comments from the point to LAST."
+  (when (and (skip-syntax-forward "^<" last))
+    (let ((beg (point)))
+      (when (and (skip-syntax-forward "^>" last) (< (point) last))
+        (forward-char)
+        (set-match-data (list beg (point)))
+        t))))
+
+(defun markdown-match-generic-links (last ref)
+  "Match inline links from point to LAST.
+When REF is non-nil, match reference links instead of standard
+links with URLs.
+This function should only be used during font-lock, as it
+determines syntax based on the presence of faces for previously
+processed elements."
+  ;; Search for the next potential link (not in a code block).
+  (let ((prohibited-faces '(markdown-pre-face
+                            markdown-code-face
+                            markdown-inline-code-face
+                            markdown-comment-face))
+        found)
+    (while
+        (and (not found) (< (point) last)
+             (progn
+               ;; Clear match data to test for a match after functions returns.
+               (set-match-data nil)
+               ;; Preliminary regular expression search so we can return
+               ;; quickly upon failure.  This doesn't handle malformed links
+               ;; or nested square brackets well, so if it passes we back up
+               ;; continue with a more precise search.
+               (re-search-forward
+                (if ref
+                    markdown-regex-link-reference
+                  markdown-regex-link-inline)
+                last 'limit)))
+      ;; Keep searching if this is in a code block, inline code, or a
+      ;; comment, or if it is include syntax. The link text portion
+      ;; (group 3) may contain inline code or comments, but the
+      ;; markup, URL, and title should not be part of such elements.
+      (if (or (markdown-range-property-any
+               (match-beginning 0) (match-end 2) 'face prohibited-faces)
+              (markdown-range-property-any
+               (match-beginning 4) (match-end 0) 'face prohibited-faces)
+              (and (char-equal (char-after (line-beginning-position)) ?<)
+                   (char-equal (char-after (1+ (line-beginning-position))) ?<)))
+          (set-match-data nil)
+        (setq found t))))
+  ;; Match opening exclamation point (optional) and left bracket.
+  (when (match-beginning 2)
+    (let* ((bang (match-beginning 1))
+           (first-begin (match-beginning 2))
+           ;; Find end of block to prevent matching across blocks.
+           (end-of-block (save-excursion
+                           (progn
+                             (goto-char (match-beginning 2))
+                             (markdown-end-of-text-block)
+                             (point))))
+           ;; Move over balanced expressions to closing right bracket.
+           ;; Catch unbalanced expression errors and return nil.
+           (first-end (condition-case nil
+                          (and (goto-char first-begin)
+                               (scan-sexps (point) 1))
+                        (error nil)))
+           ;; Continue with point at CONT-POINT upon failure.
+           (cont-point (min (1+ first-begin) last))
+           second-begin second-end url-begin url-end
+           title-begin title-end)
+      ;; When bracket found, in range, and followed by a left paren/bracket...
+      (when (and first-end (< first-end end-of-block) (goto-char first-end)
+                 (char-equal (char-after (point)) (if ref ?\[ ?\()))
+        ;; Scan across balanced expressions for closing parenthesis/bracket.
+        (setq second-begin (point)
+              second-end (condition-case nil
+                             (scan-sexps (point) 1)
+                           (error nil)))
+        ;; Check that closing parenthesis/bracket is in range.
+        (if (and second-end (<= second-end end-of-block) (<= second-end last))
+            (progn
+              ;; Search for (optional) title inside closing parenthesis
+              (when (and (not ref) (search-forward "\"" second-end t))
+                (setq title-begin (1- (point))
+                      title-end (and (goto-char second-end)
+                                     (search-backward "\"" (1+ title-begin) t))
+                      title-end (and title-end (1+ title-end))))
+              ;; Store URL/reference range
+              (setq url-begin (1+ second-begin)
+                    url-end (1- (or title-begin second-end)))
+              ;; Set match data, move point beyond link, and return
+              (set-match-data
+               (list (or bang first-begin) second-end  ; 0 - all
+                     bang (and bang (1+ bang))         ; 1 - bang
+                     first-begin (1+ first-begin)      ; 2 - markup
+                     (1+ first-begin) (1- first-end)   ; 3 - link text
+                     (1- first-end) first-end          ; 4 - markup
+                     second-begin (1+ second-begin)    ; 5 - markup
+                     url-begin url-end                 ; 6 - url/reference
+                     title-begin title-end             ; 7 - title
+                     (1- second-end) second-end))      ; 8 - markup
+              ;; Nullify cont-point and leave point at end and
+              (setq cont-point nil)
+              (goto-char second-end))
+          ;; If no closing parenthesis in range, update continuation point
+          (setq cont-point (min end-of-block second-begin))))
+      (cond
+       ;; On failure, continue searching at cont-point
+       ((and cont-point (< cont-point last))
+        (goto-char cont-point)
+        (markdown-match-generic-links last ref))
+       ;; No more text, return nil
+       ((and cont-point (= cont-point last))
+        nil)
+       ;; Return t if a match occurred
+       (t t)))))
+
+(defun markdown-match-angle-uris (last)
+  "Match angle bracket URIs from point to LAST."
+  (when (markdown-match-inline-generic markdown-regex-angle-uri last)
+    (goto-char (1+ (match-end 0)))))
+
+(defun markdown-match-plain-uris (last)
+  "Match plain URIs from point to LAST."
+  (when (markdown-match-inline-generic markdown-regex-uri last t)
+    (goto-char (1+ (match-end 0)))))
+
+(defvar markdown-conditional-search-function #'re-search-forward
+  "Conditional search function used in `markdown-search-until-condition'.
+Made into a variable to allow for dynamic let-binding.")
+
+(defun markdown-search-until-condition (condition &rest args)
+  (let (ret)
+    (while (and (not ret) (apply markdown-conditional-search-function args))
+      (setq ret (funcall condition)))
+    ret))
+
+(defun markdown-metadata-line-p (pos regexp)
+  (save-excursion
+    (or (= (line-number-at-pos pos) 1)
+        (progn
+          (forward-line -1)
+          ;; skip multi-line metadata
+          (while (and (looking-at-p "^\\s-+[[:alpha:]]")
+                      (> (line-number-at-pos (point)) 1))
+            (forward-line -1))
+          (looking-at-p regexp)))))
+
+(defun markdown-match-generic-metadata (regexp last)
+  "Match metadata declarations specified by REGEXP from point to LAST.
+These declarations must appear inside a metadata block that begins at
+the beginning of the buffer and ends with a blank line (or the end of
+the buffer)."
+  (let* ((first (point))
+         (end-re "\n[ \t]*\n\\|\n\\'\\|\\'")
+         (block-begin (goto-char 1))
+         (block-end (re-search-forward end-re nil t)))
+    (if (and block-end (> first block-end))
+        ;; Don't match declarations if there is no metadata block or if
+        ;; the point is beyond the block.  Move point to point-max to
+        ;; prevent additional searches and return return nil since nothing
+        ;; was found.
+        (progn (goto-char (point-max)) nil)
+      ;; If a block was found that begins before LAST and ends after
+      ;; point, search for declarations inside it.  If the starting is
+      ;; before the beginning of the block, start there. Otherwise,
+      ;; move back to FIRST.
+      (goto-char (if (< first block-begin) block-begin first))
+      (if (and (re-search-forward regexp (min last block-end) t)
+               (markdown-metadata-line-p (point) regexp))
+          ;; If a metadata declaration is found, set match-data and return t.
+          (let ((key-beginning (match-beginning 1))
+                (key-end (match-end 1))
+                (markup-begin (match-beginning 2))
+                (markup-end (match-end 2))
+                (value-beginning (match-beginning 3)))
+            (set-match-data (list key-beginning (point) ; complete metadata
+                                  key-beginning key-end ; key
+                                  markup-begin markup-end ; markup
+                                  value-beginning (point))) ; value
+            t)
+        ;; Otherwise, move the point to last and return nil
+        (goto-char last)
+        nil))))
+
+(defun markdown-match-declarative-metadata (last)
+  "Match declarative metadata from the point to LAST."
+  (markdown-match-generic-metadata markdown-regex-declarative-metadata last))
+
+(defun markdown-match-pandoc-metadata (last)
+  "Match Pandoc metadata from the point to LAST."
+  (markdown-match-generic-metadata markdown-regex-pandoc-metadata last))
+
+(defun markdown-match-yaml-metadata-begin (last)
+  (markdown-match-propertized-text 'markdown-yaml-metadata-begin last))
+
+(defun markdown-match-yaml-metadata-end (last)
+  (markdown-match-propertized-text 'markdown-yaml-metadata-end last))
+
+(defun markdown-match-yaml-metadata-key (last)
+  (markdown-match-propertized-text 'markdown-metadata-key last))
+
+(defun markdown-match-wiki-link (last)
+  "Match wiki links from point to LAST."
+  (when (and markdown-enable-wiki-links
+             (not markdown-wiki-link-fontify-missing)
+             (markdown-match-inline-generic markdown-regex-wiki-link last))
+    (let ((begin (match-beginning 1)) (end (match-end 1)))
+      (if (or (markdown-in-comment-p begin)
+              (markdown-in-comment-p end)
+              (markdown-inline-code-at-pos-p begin)
+              (markdown-inline-code-at-pos-p end)
+              (markdown-code-block-at-pos begin))
+          (progn (goto-char (min (1+ begin) last))
+                 (when (< (point) last)
+                   (markdown-match-wiki-link last)))
+        (set-match-data (list begin end))
+        t))))
+
+(defun markdown-match-inline-attributes (last)
+  "Match inline attributes from point to LAST."
+  ;; #428 re-search-forward markdown-regex-inline-attributes is very slow.
+  ;; So use simple regex for re-search-forward and use markdown-regex-inline-attributes
+  ;; against matched string.
+  (when (markdown-match-inline-generic "[ \t]*\\({\\)\\([^\n]*\\)}[ \t]*$" last)
+    (if (not (string-match-p markdown-regex-inline-attributes (match-string 0)))
+        (markdown-match-inline-attributes last)
+      (unless (or (markdown-inline-code-at-pos-p (match-beginning 0))
+                  (markdown-inline-code-at-pos-p (match-end 0))
+                  (markdown-in-comment-p))
+        t))))
+
+(defun markdown-match-leanpub-sections (last)
+  "Match Leanpub section markers from point to LAST."
+  (when (markdown-match-inline-generic markdown-regex-leanpub-sections last)
+    (unless (or (markdown-inline-code-at-pos-p (match-beginning 0))
+                (markdown-inline-code-at-pos-p (match-end 0))
+                (markdown-in-comment-p))
+      t)))
+
+(defun markdown-match-includes (last)
+  "Match include statements from point to LAST.
+Sets match data for the following seven groups:
+Group 1: opening two angle brackets
+Group 2: opening title delimiter (optional)
+Group 3: title text (optional)
+Group 4: closing title delimiter (optional)
+Group 5: opening filename delimiter
+Group 6: filename
+Group 7: closing filename delimiter"
+  (when (markdown-match-inline-generic markdown-regex-include last)
+    (let ((valid (not (or (markdown-in-comment-p (match-beginning 0))
+                          (markdown-in-comment-p (match-end 0))
+                          (markdown-code-block-at-pos (match-beginning 0))))))
+      (cond
+       ;; Parentheses and maybe square brackets, but no curly braces:
+       ;; match optional title in square brackets and file in parentheses.
+       ((and valid (match-beginning 5)
+             (not (match-beginning 8)))
+        (set-match-data (list (match-beginning 1) (match-end 7)
+                              (match-beginning 1) (match-end 1)
+                              (match-beginning 2) (match-end 2)
+                              (match-beginning 3) (match-end 3)
+                              (match-beginning 4) (match-end 4)
+                              (match-beginning 5) (match-end 5)
+                              (match-beginning 6) (match-end 6)
+                              (match-beginning 7) (match-end 7))))
+       ;; Only square brackets present: match file in square brackets.
+       ((and valid (match-beginning 2)
+             (not (match-beginning 5))
+             (not (match-beginning 7)))
+        (set-match-data (list (match-beginning 1) (match-end 4)
+                              (match-beginning 1) (match-end 1)
+                              nil nil
+                              nil nil
+                              nil nil
+                              (match-beginning 2) (match-end 2)
+                              (match-beginning 3) (match-end 3)
+                              (match-beginning 4) (match-end 4))))
+       ;; Only curly braces present: match file in curly braces.
+       ((and valid (match-beginning 8)
+             (not (match-beginning 2))
+             (not (match-beginning 5)))
+        (set-match-data (list (match-beginning 1) (match-end 10)
+                              (match-beginning 1) (match-end 1)
+                              nil nil
+                              nil nil
+                              nil nil
+                              (match-beginning 8) (match-end 8)
+                              (match-beginning 9) (match-end 9)
+                              (match-beginning 10) (match-end 10))))
+       (t
+        ;; Not a valid match, move to next line and search again.
+        (forward-line)
+        (when (< (point) last)
+          (setq valid (markdown-match-includes last)))))
+      valid)))
+
+(defun markdown-match-html-tag (last)
+  "Match HTML tags from point to LAST."
+  (when (and markdown-enable-html
+             (markdown-match-inline-generic markdown-regex-html-tag last t))
+    (set-match-data (list (match-beginning 0) (match-end 0)
+                          (match-beginning 1) (match-end 1)
+                          (match-beginning 2) (match-end 2)
+                          (match-beginning 9) (match-end 9)))
+    t))
+
+
+;;; Markdown Font Fontification Functions =====================================
+
+(defvar markdown--first-displayable-cache (make-hash-table :test #'equal))
+
+(defun markdown--first-displayable (seq)
+  "Return the first displayable character or string in SEQ.
+SEQ may be an atom or a sequence."
+  (let ((c (gethash seq markdown--first-displayable-cache t)))
+    (if (not (eq c t))
+        c
+      (puthash seq
+               (let ((seq (if (listp seq) seq (list seq))))
+                 (cond ((stringp (car seq))
+                        (cl-find-if
+                         (lambda (str)
+                           (and (mapcar #'char-displayable-p (string-to-list str))))
+                         seq))
+                       ((characterp (car seq))
+                        (cl-find-if #'char-displayable-p seq))))
+               markdown--first-displayable-cache))))
+
+(defun markdown--marginalize-string (level)
+  "Generate atx markup string of given LEVEL for left margin."
+  (let ((margin-left-space-count
+         (- markdown-marginalize-headers-margin-width level)))
+    (concat (make-string margin-left-space-count ? )
+            (make-string level ?#))))
+
+(defun markdown-marginalize-update-current ()
+  "Update the window configuration to create a left margin."
+  (if window-system
+      (let* ((header-delimiter-font-width
+              (window-font-width nil 'markdown-header-delimiter-face))
+             (margin-pixel-width (* markdown-marginalize-headers-margin-width
+                                    header-delimiter-font-width))
+             (margin-char-width (/ margin-pixel-width (default-font-width))))
+        (set-window-margins nil margin-char-width))
+    ;; As a fallback, simply set margin based on character count.
+    (set-window-margins nil (1+ markdown-marginalize-headers-margin-width))))
+
+(defun markdown-fontify-headings (last)
+  "Add text properties to headings from point to LAST."
+  (when (markdown-match-propertized-text 'markdown-heading last)
+    (let* ((level (markdown-outline-level))
+           (heading-face
+            (intern (format "markdown-header-face-%d" level)))
+           (heading-props `(face ,heading-face))
+           (left-markup-props
+            `(face markdown-header-delimiter-face
+                   ,@(cond
+                      (markdown-hide-markup
+                       `(display ""))
+                      (markdown-marginalize-headers
+                       `(display ((margin left-margin)
+                                  ,(markdown--marginalize-string level)))))))
+           (right-markup-props
+            `(face markdown-header-delimiter-face
+                   ,@(when markdown-hide-markup `(display ""))))
+           (rule-props `(face markdown-header-rule-face
+                              ,@(when markdown-hide-markup `(display "")))))
+      (if (match-end 1)
+          ;; Setext heading
+          (progn (add-text-properties
+                  (match-beginning 1) (match-end 1) heading-props)
+                 (if (= level 1)
+                     (add-text-properties
+                      (match-beginning 2) (match-end 2) rule-props)
+                   (add-text-properties
+                    (match-beginning 3) (match-end 3) rule-props)))
+        ;; atx heading
+        (if markdown-fontify-whole-heading-line
+            (let ((header-end (min (point-max) (1+ (match-end 0)))))
+              (add-text-properties
+               (match-beginning 0) header-end heading-props))
+          (add-text-properties
+           (match-beginning 4) (match-end 4) left-markup-props)
+          (add-text-properties
+           (match-beginning 5) (match-end 5) heading-props)
+          (when (match-end 6)
+            (add-text-properties
+             (match-beginning 6) (match-end 6) right-markup-props)))))
+    t))
+
+(defun markdown-fontify-tables (last)
+  (when (re-search-forward "|" last t)
+    (when (markdown-table-at-point-p)
+      (font-lock-append-text-property
+       (line-beginning-position) (min (1+ (line-end-position)) (point-max))
+       'face 'markdown-table-face))
+    (forward-line 1)
+    t))
+
+(defun markdown-fontify-blockquotes (last)
+  "Apply font-lock properties to blockquotes from point to LAST."
+  (when (markdown-match-blockquotes last)
+    (let ((display-string
+           (markdown--first-displayable markdown-blockquote-display-char)))
+      (add-text-properties
+       (match-beginning 1) (match-end 1)
+       (if markdown-hide-markup
+           `(face markdown-blockquote-face display ,display-string)
+         `(face markdown-markup-face)))
+      (font-lock-append-text-property
+       (match-beginning 0) (match-end 0) 'face 'markdown-blockquote-face)
+      t)))
+
+(defun markdown-fontify-list-items (last)
+  "Apply font-lock properties to list markers from point to LAST."
+  (when (markdown-match-list-items last)
+    (when (not (markdown-code-block-at-point-p (match-beginning 2)))
+      (let* ((indent (length (match-string-no-properties 1)))
+             (level (/ indent markdown-list-indent-width)) ;; level = 0, 1, 2, ...
+             (bullet (nth (mod level (length markdown-list-item-bullets))
+                          markdown-list-item-bullets)))
+        (add-text-properties
+         (match-beginning 2) (match-end 2) '(face markdown-list-face))
+        (when markdown-hide-markup
+          (cond
+           ;; Unordered lists
+           ((string-match-p "[\\*\\+-]" (match-string 2))
+            (add-text-properties
+             (match-beginning 2) (match-end 2) `(display ,bullet)))
+           ;; Definition lists
+           ((string-equal ":" (match-string 2))
+            (let ((display-string
+                   (char-to-string (markdown--first-displayable
+                                    markdown-definition-display-char))))
+              (add-text-properties (match-beginning 2) (match-end 2)
+                                   `(display ,display-string))))))))
+    t))
+
+(defun markdown-fontify-hrs (last)
+  "Add text properties to horizontal rules from point to LAST."
+  (when (markdown-match-hr last)
+    (let ((hr-char (markdown--first-displayable markdown-hr-display-char)))
+      (add-text-properties
+       (match-beginning 0) (match-end 0)
+       `(face markdown-hr-face
+              font-lock-multiline t
+              ,@(when (and markdown-hide-markup hr-char)
+                  `(display ,(make-string
+                              (1- (window-body-width)) hr-char)))))
+      t)))
+
+(defun markdown-fontify-sub-superscripts (last)
+  "Apply text properties to sub- and superscripts from point to LAST."
+  (when (markdown-search-until-condition
+         (lambda () (and (not (markdown-code-block-at-point-p))
+                         (not (markdown-inline-code-at-point-p))
+                         (not (markdown-in-comment-p))))
+         markdown-regex-sub-superscript last t)
+    (let* ((subscript-p (string= (match-string 2) "~"))
+           (props
+            (if subscript-p
+                (car markdown-sub-superscript-display)
+              (cdr markdown-sub-superscript-display)))
+           (mp (list 'face 'markdown-markup-face
+                     'invisible 'markdown-markup)))
+      (when markdown-hide-markup
+        (put-text-property (match-beginning 3) (match-end 3)
+                           'display props))
+      (add-text-properties (match-beginning 2) (match-end 2) mp)
+      (add-text-properties (match-beginning 4) (match-end 4) mp)
+      t)))
+
+
+;;; Syntax Table ==============================================================
+
+(defvar markdown-mode-syntax-table
+  (let ((tab (make-syntax-table text-mode-syntax-table)))
+    (modify-syntax-entry ?\" "." tab)
+    tab)
+  "Syntax table for `markdown-mode'.")
+
+
+;;; Element Insertion =========================================================
+
+(defun markdown-ensure-blank-line-before ()
+  "If previous line is not already blank, insert a blank line before point."
+  (unless (bolp) (insert "\n"))
+  (unless (or (bobp) (looking-back "\n\\s-*\n" nil)) (insert "\n")))
+
+(defun markdown-ensure-blank-line-after ()
+  "If following line is not already blank, insert a blank line after point.
+Return the point where it was originally."
+  (save-excursion
+    (unless (eolp) (insert "\n"))
+    (unless (or (eobp) (looking-at-p "\n\\s-*\n")) (insert "\n"))))
+
+(defun markdown-wrap-or-insert (s1 s2 &optional thing beg end)
+  "Insert the strings S1 and S2, wrapping around region or THING.
+If a region is specified by the optional BEG and END arguments,
+wrap the strings S1 and S2 around that region.
+If there is an active region, wrap the strings S1 and S2 around
+the region.  If there is not an active region but the point is at
+THING, wrap that thing (which defaults to word).  Otherwise, just
+insert S1 and S2 and place the point in between.  Return the
+bounds of the entire wrapped string, or nil if nothing was wrapped
+and S1 and S2 were only inserted."
+  (let (a b bounds new-point)
+    (cond
+     ;; Given region
+     ((and beg end)
+      (setq a beg
+            b end
+            new-point (+ (point) (length s1))))
+     ;; Active region
+     ((use-region-p)
+      (setq a (region-beginning)
+            b (region-end)
+            new-point (+ (point) (length s1))))
+     ;; Thing (word) at point
+     ((setq bounds (markdown-bounds-of-thing-at-point (or thing 'word)))
+      (setq a (car bounds)
+            b (cdr bounds)
+            new-point (+ (point) (length s1))))
+     ;; No active region and no word
+     (t
+      (setq a (point)
+            b (point))))
+    (goto-char b)
+    (insert s2)
+    (goto-char a)
+    (insert s1)
+    (when new-point (goto-char new-point))
+    (if (= a b)
+        nil
+      (setq b (+ b (length s1) (length s2)))
+      (cons a b))))
+
+(defun markdown-point-after-unwrap (cur prefix suffix)
+  "Return desired position of point after an unwrapping operation.
+CUR gives the position of the point before the operation.
+Additionally, two cons cells must be provided.  PREFIX gives the
+bounds of the prefix string and SUFFIX gives the bounds of the
+suffix string."
+  (cond ((< cur (cdr prefix)) (car prefix))
+        ((< cur (car suffix)) (- cur (- (cdr prefix) (car prefix))))
+        ((<= cur (cdr suffix))
+         (- cur (+ (- (cdr prefix) (car prefix))
+                   (- cur (car suffix)))))
+        (t cur)))
+
+(defun markdown-unwrap-thing-at-point (regexp all text)
+  "Remove prefix and suffix of thing at point and reposition the point.
+When the thing at point matches REGEXP, replace the subexpression
+ALL with the string in subexpression TEXT.  Reposition the point
+in an appropriate location accounting for the removal of prefix
+and suffix strings.  Return new bounds of string from group TEXT.
+When REGEXP is nil, assumes match data is already set."
+  (when (or (null regexp)
+            (thing-at-point-looking-at regexp))
+    (let ((cur (point))
+          (prefix (cons (match-beginning all) (match-beginning text)))
+          (suffix (cons (match-end text) (match-end all)))
+          (bounds (cons (match-beginning text) (match-end text))))
+      ;; Replace the thing at point
+      (replace-match (match-string text) t t nil all)
+      ;; Reposition the point
+      (goto-char (markdown-point-after-unwrap cur prefix suffix))
+      ;; Adjust bounds
+      (setq bounds (cons (car prefix)
+                         (- (cdr bounds) (- (cdr prefix) (car prefix))))))))
+
+(defun markdown-unwrap-things-in-region (beg end regexp all text)
+  "Remove prefix and suffix of all things in region from BEG to END.
+When a thing in the region matches REGEXP, replace the
+subexpression ALL with the string in subexpression TEXT.
+Return a cons cell containing updated bounds for the region."
+  (save-excursion
+    (goto-char beg)
+    (let ((removed 0) len-all len-text)
+      (while (re-search-forward regexp (- end removed) t)
+        (setq len-all (length (match-string-no-properties all)))
+        (setq len-text (length (match-string-no-properties text)))
+        (setq removed (+ removed (- len-all len-text)))
+        (replace-match (match-string text) t t nil all))
+      (cons beg (- end removed)))))
+
+(defun markdown-insert-hr (arg)
+  "Insert or replace a horizontal rule.
+By default, use the first element of `markdown-hr-strings'.  When
+ARG is non-nil, as when given a prefix, select a different
+element as follows.  When prefixed with \\[universal-argument],
+use the last element of `markdown-hr-strings' instead.  When
+prefixed with an integer from 1 to the length of
+`markdown-hr-strings', use the element in that position instead."
+  (interactive "*P")
+  (when (thing-at-point-looking-at markdown-regex-hr)
+    (delete-region (match-beginning 0) (match-end 0)))
+  (markdown-ensure-blank-line-before)
+  (cond ((equal arg '(4))
+         (insert (car (reverse markdown-hr-strings))))
+        ((and (integerp arg) (> arg 0)
+              (<= arg (length markdown-hr-strings)))
+         (insert (nth (1- arg) markdown-hr-strings)))
+        (t
+         (insert (car markdown-hr-strings))))
+  (markdown-ensure-blank-line-after))
+
+(defun markdown--insert-common (start-delim end-delim regex start-group end-group face
+                                            &optional skip-space)
+  (if (use-region-p)
+      ;; Active region
+      (let* ((bounds (markdown-unwrap-things-in-region
+                      (region-beginning) (region-end)
+                      regex start-group end-group))
+             (beg (car bounds))
+             (end (cdr bounds)))
+        (when (and beg skip-space)
+          (save-excursion
+            (goto-char beg)
+            (skip-chars-forward "[ \t]")
+            (setq beg (point))))
+        (when (and end skip-space)
+          (save-excursion
+            (goto-char end)
+            (skip-chars-backward "[ \t]")
+            (setq end (point))))
+        (markdown-wrap-or-insert start-delim end-delim nil beg end))
+    (if (markdown--face-p (point) (list face))
+        (save-excursion
+          (while (and (markdown--face-p (point) (list face)) (not (bobp)))
+            (forward-char -1))
+          (forward-char (- (1- (length start-delim)))) ;; for delimiter
+          (unless (bolp)
+            (forward-char -1))
+          (when (looking-at regex)
+            (markdown-unwrap-thing-at-point nil start-group end-group)))
+      (if (thing-at-point-looking-at regex)
+          (markdown-unwrap-thing-at-point nil start-group end-group)
+        (markdown-wrap-or-insert start-delim end-delim 'word nil nil)))))
+
+(defun markdown-insert-bold ()
+  "Insert markup to make a region or word bold.
+If there is an active region, make the region bold.  If the point
+is at a non-bold word, make the word bold.  If the point is at a
+bold word or phrase, remove the bold markup.  Otherwise, simply
+insert bold delimiters and place the point in between them."
+  (interactive)
+  (let ((delim (if markdown-bold-underscore "__" "**")))
+    (markdown--insert-common delim delim markdown-regex-bold 2 4 'markdown-bold-face t)))
+
+(defun markdown-insert-italic ()
+  "Insert markup to make a region or word italic.
+If there is an active region, make the region italic.  If the point
+is at a non-italic word, make the word italic.  If the point is at an
+italic word or phrase, remove the italic markup.  Otherwise, simply
+insert italic delimiters and place the point in between them."
+  (interactive)
+  (let ((delim (if markdown-italic-underscore "_" "*")))
+    (markdown--insert-common delim delim markdown-regex-italic 1 3 'markdown-italic-face t)))
+
+(defun markdown-insert-strike-through ()
+  "Insert markup to make a region or word strikethrough.
+If there is an active region, make the region strikethrough.  If the point
+is at a non-bold word, make the word strikethrough.  If the point is at a
+strikethrough word or phrase, remove the strikethrough markup.  Otherwise,
+simply insert bold delimiters and place the point in between them."
+  (interactive)
+  (markdown--insert-common
+   "~~" "~~" markdown-regex-strike-through 2 4 'markdown-strike-through-face t))
+
+(defun markdown-insert-code ()
+  "Insert markup to make a region or word an inline code fragment.
+If there is an active region, make the region an inline code
+fragment.  If the point is at a word, make the word an inline
+code fragment.  Otherwise, simply insert code delimiters and
+place the point in between them."
+  (interactive)
+  (if (use-region-p)
+      ;; Active region
+      (let ((bounds (markdown-unwrap-things-in-region
+                     (region-beginning) (region-end)
+                     markdown-regex-code 1 3)))
+        (markdown-wrap-or-insert "`" "`" nil (car bounds) (cdr bounds)))
+    ;; Code markup removal, code markup for word, or empty markup insertion
+    (if (markdown-inline-code-at-point)
+        (markdown-unwrap-thing-at-point nil 0 2)
+      (markdown-wrap-or-insert "`" "`" 'word nil nil))))
+
+(defun markdown-insert-kbd ()
+  "Insert markup to wrap region or word in <kbd> tags.
+If there is an active region, use the region.  If the point is at
+a word, use the word.  Otherwise, simply insert <kbd> tags and
+place the point in between them."
+  (interactive)
+  (if (use-region-p)
+      ;; Active region
+      (let ((bounds (markdown-unwrap-things-in-region
+                     (region-beginning) (region-end)
+                     markdown-regex-kbd 0 2)))
+        (markdown-wrap-or-insert "<kbd>" "</kbd>" nil (car bounds) (cdr bounds)))
+    ;; Markup removal, markup for word, or empty markup insertion
+    (if (thing-at-point-looking-at markdown-regex-kbd)
+        (markdown-unwrap-thing-at-point nil 0 2)
+      (markdown-wrap-or-insert "<kbd>" "</kbd>" 'word nil nil))))
+
+(defun markdown-insert-inline-link (text url &optional title)
+  "Insert an inline link with TEXT pointing to URL.
+Optionally, the user can provide a TITLE."
+  (let ((cur (point)))
+    (setq title (and title (concat " \"" title "\"")))
+    (insert (concat "[" text "](" url title ")"))
+    (cond ((not text) (goto-char (+ 1 cur)))
+          ((not url) (goto-char (+ 3 (length text) cur))))))
+
+(defun markdown-insert-inline-image (text url &optional title)
+  "Insert an inline link with alt TEXT pointing to URL.
+Optionally, also provide a TITLE."
+  (let ((cur (point)))
+    (setq title (and title (concat " \"" title "\"")))
+    (insert (concat "![" text "](" url title ")"))
+    (cond ((not text) (goto-char (+ 2 cur)))
+          ((not url) (goto-char (+ 4 (length text) cur))))))
+
+(defun markdown-insert-reference-link (text label &optional url title)
+  "Insert a reference link and, optionally, a reference definition.
+The link TEXT will be inserted followed by the optional LABEL.
+If a URL is given, also insert a definition for the reference
+LABEL according to `markdown-reference-location'.  If a TITLE is
+given, it will be added to the end of the reference definition
+and will be used to populate the title attribute when converted
+to XHTML.  If URL is nil, insert only the link portion (for
+example, when a reference label is already defined)."
+  (insert (concat "[" text "][" label "]"))
+  (when url
+    (markdown-insert-reference-definition
+     (if (string-equal label "") text label)
+     url title)))
+
+(defun markdown-insert-reference-image (text label &optional url title)
+  "Insert a reference image and, optionally, a reference definition.
+The alt TEXT will be inserted followed by the optional LABEL.
+If a URL is given, also insert a definition for the reference
+LABEL according to `markdown-reference-location'.  If a TITLE is
+given, it will be added to the end of the reference definition
+and will be used to populate the title attribute when converted
+to XHTML.  If URL is nil, insert only the link portion (for
+example, when a reference label is already defined)."
+  (insert (concat "![" text "][" label "]"))
+  (when url
+    (markdown-insert-reference-definition
+     (if (string-equal label "") text label)
+     url title)))
+
+(defun markdown-insert-reference-definition (label &optional url title)
+  "Add definition for reference LABEL with URL and TITLE.
+LABEL is a Markdown reference label without square brackets.
+URL and TITLE are optional.  When given, the TITLE will
+be used to populate the title attribute when converted to XHTML."
+  ;; END specifies where to leave the point upon return
+  (let ((end (point)))
+    (cl-case markdown-reference-location
+      (end         (goto-char (point-max)))
+      (immediately (markdown-end-of-text-block))
+      (subtree     (markdown-end-of-subtree))
+      (header      (markdown-end-of-defun)))
+    ;; Skip backwards over local variables.  This logic is similar to the one
+    ;; used in ‘hack-local-variables’.
+    (when (and enable-local-variables (eobp))
+      (search-backward "\n\f" (max (- (point) 3000) (point-min)) :move)
+      (when (let ((case-fold-search t))
+              (search-forward "Local Variables:" nil :move))
+        (beginning-of-line 0)
+        (when (eq (char-before) ?\n) (backward-char))))
+    (unless (or (markdown-cur-line-blank-p)
+                (thing-at-point-looking-at markdown-regex-reference-definition))
+      (insert "\n"))
+    (insert "\n[" label "]: ")
+    (if url
+        (insert url)
+      ;; When no URL is given, leave point at END following the colon
+      (setq end (point)))
+    (when (> (length title) 0)
+      (insert " \"" title "\""))
+    (unless (looking-at-p "\n")
+      (insert "\n"))
+    (goto-char end)
+    (when url
+      (message
+       (markdown--substitute-command-keys
+        "Reference [%s] was defined, press \\[markdown-do] to jump there")
+       label))))
+
+(defcustom markdown-link-make-text-function nil
+  "Function that automatically generates a link text for a URL.
+
+If non-nil, this function will be called by
+`markdown--insert-link-or-image' and the result will be the
+default link text. The function should receive exactly one
+argument that corresponds to the link URL."
+  :group 'markdown
+  :type 'function
+  :package-version '(markdown-mode . "2.5"))
+
+(defcustom markdown-disable-tooltip-prompt nil
+  "Disable prompt for tooltip when inserting a link or image.
+
+If non-nil, `markdown-insert-link' and `markdown-insert-link'
+will not prompt the user to insert a tooltip text for the given
+link or image."
+  :group 'markdown
+  :type 'boolean
+  :safe 'booleanp
+  :package-version '(markdown-mode . "2.5"))
+
+(defun markdown--insert-link-or-image (image)
+  "Interactively insert new or update an existing link or image.
+When IMAGE is non-nil, insert an image.  Otherwise, insert a link.
+This is an internal function called by
+`markdown-insert-link' and `markdown-insert-image'."
+  (cl-multiple-value-bind (begin end text uri ref title)
+      (if (use-region-p)
+          ;; Use region as either link text or URL as appropriate.
+          (let ((region (buffer-substring-no-properties
+                         (region-beginning) (region-end))))
+            (if (string-match markdown-regex-uri region)
+                ;; Region contains a URL; use it as such.
+                (list (region-beginning) (region-end)
+                      nil (match-string 0 region) nil nil)
+              ;; Region doesn't contain a URL, so use it as text.
+              (list (region-beginning) (region-end)
+                    region nil nil nil)))
+        ;; Extract and use properties of existing link, if any.
+        (markdown-link-at-pos (point)))
+    (let* ((ref (when ref (concat "[" ref "]")))
+           (defined-refs (mapcar #'car (markdown-get-defined-references)))
+           (defined-ref-cands (mapcar (lambda (ref) (concat "[" ref "]")) defined-refs))
+           (used-uris (markdown-get-used-uris))
+           (uri-or-ref (completing-read
+                        "URL or [reference]: "
+                        (append defined-ref-cands used-uris)
+                        nil nil (or uri ref)))
+           (ref (cond ((string-match "\\`\\[\\(.*\\)\\]\\'" uri-or-ref)
+                       (match-string 1 uri-or-ref))
+                      ((string-equal "" uri-or-ref)
+                       "")))
+           (uri (unless ref uri-or-ref))
+           (text-prompt (if image
+                            "Alt text: "
+                          (if ref
+                              "Link text: "
+                            "Link text (blank for plain URL): ")))
+           (text (or text (and markdown-link-make-text-function uri
+                               (funcall markdown-link-make-text-function uri))))
+           (text (completing-read text-prompt defined-refs nil nil text))
+           (text (if (= (length text) 0) nil text))
+           (plainp (and uri (not text)))
+           (implicitp (string-equal ref ""))
+           (ref (if implicitp text ref))
+           (definedp (and ref (markdown-reference-definition ref)))
+           (ref-url (unless (or uri definedp)
+                      (completing-read "Reference URL: " used-uris)))
+           (title (unless (or plainp definedp markdown-disable-tooltip-prompt)
+                    (read-string "Title (tooltip text, optional): " title)))
+           (title (if (= (length title) 0) nil title)))
+      (when (and image implicitp)
+        (user-error "Reference required: implicit image references are invalid"))
+      (when (and begin end)
+        (delete-region begin end))
+      (cond
+       ((and (not image) uri text)
+        (markdown-insert-inline-link text uri title))
+       ((and image uri text)
+        (markdown-insert-inline-image text uri title))
+       ((and ref text)
+        (if image
+            (markdown-insert-reference-image text (unless implicitp ref) nil title)
+          (markdown-insert-reference-link text (unless implicitp ref) nil title))
+        (unless definedp
+          (markdown-insert-reference-definition ref ref-url title)))
+       ((and (not image) uri)
+        (markdown-insert-uri uri))))))
+
+(defun markdown-insert-link ()
+  "Insert new or update an existing link, with interactive prompt.
+If the point is at an existing link or URL, update the link text,
+URL, reference label, and/or title.  Otherwise, insert a new link.
+The type of link inserted (inline, reference, or plain URL)
+depends on which values are provided:
+
+*   If a URL and TEXT are given, insert an inline link: [TEXT](URL).
+*   If [REF] and TEXT are given, insert a reference link: [TEXT][REF].
+*   If only TEXT is given, insert an implicit reference link: [TEXT][].
+*   If only a URL is given, insert a plain link: <URL>.
+
+In other words, to create an implicit reference link, leave the
+URL prompt empty and to create a plain URL link, leave the link
+text empty.
+
+If there is an active region, use the text as the default URL, if
+it seems to be a URL, or link text value otherwise.
+
+If a given reference is not defined, this function will
+additionally prompt for the URL and optional title.  In this case,
+the reference definition is placed at the location determined by
+`markdown-reference-location'.  In addition, it is possible to
+have the `markdown-link-make-text-function' function, if non-nil,
+define the default link text before prompting the user for it.
+
+If `markdown-disable-tooltip-prompt' is non-nil, the user will
+not be prompted to add or modify a tooltip text.
+
+Through updating the link, this function can be used to convert a
+link of one type (inline, reference, or plain) to another type by
+selectively adding or removing information via the prompts."
+  (interactive)
+  (markdown--insert-link-or-image nil))
+
+(defun markdown-insert-image ()
+  "Insert new or update an existing image, with interactive prompt.
+If the point is at an existing image, update the alt text, URL,
+reference label, and/or title. Otherwise, insert a new image.
+The type of image inserted (inline or reference) depends on which
+values are provided:
+
+*   If a URL and ALT-TEXT are given, insert an inline image:
+    ![ALT-TEXT](URL).
+*   If [REF] and ALT-TEXT are given, insert a reference image:
+    ![ALT-TEXT][REF].
+
+If there is an active region, use the text as the default URL, if
+it seems to be a URL, or alt text value otherwise.
+
+If a given reference is not defined, this function will
+additionally prompt for the URL and optional title.  In this case,
+the reference definition is placed at the location determined by
+`markdown-reference-location'.
+
+Through updating the image, this function can be used to convert an
+image of one type (inline or reference) to another type by
+selectively adding or removing information via the prompts."
+  (interactive)
+  (markdown--insert-link-or-image t))
+
+(defun markdown-insert-uri (&optional uri)
+  "Insert markup for an inline URI.
+If there is an active region, use it as the URI.  If the point is
+at a URI, wrap it with angle brackets.  If the point is at an
+inline URI, remove the angle brackets.  Otherwise, simply insert
+angle brackets place the point between them."
+  (interactive)
+  (if (use-region-p)
+      ;; Active region
+      (let ((bounds (markdown-unwrap-things-in-region
+                     (region-beginning) (region-end)
+                     markdown-regex-angle-uri 0 2)))
+        (markdown-wrap-or-insert "<" ">" nil (car bounds) (cdr bounds)))
+    ;; Markup removal, URI at point, new URI, or empty markup insertion
+    (if (thing-at-point-looking-at markdown-regex-angle-uri)
+        (markdown-unwrap-thing-at-point nil 0 2)
+      (if uri
+          (insert "<" uri ">")
+        (markdown-wrap-or-insert "<" ">" 'url nil nil)))))
+
+(defun markdown-insert-wiki-link ()
+  "Insert a wiki link of the form [[WikiLink]].
+If there is an active region, use the region as the link text.
+If the point is at a word, use the word as the link text.  If
+there is no active region and the point is not at word, simply
+insert link markup."
+  (interactive)
+  (if (use-region-p)
+      ;; Active region
+      (markdown-wrap-or-insert "[[" "]]" nil (region-beginning) (region-end))
+    ;; Markup removal, wiki link at at point, or empty markup insertion
+    (if (thing-at-point-looking-at markdown-regex-wiki-link)
+        (if (or markdown-wiki-link-alias-first
+                (null (match-string 5)))
+            (markdown-unwrap-thing-at-point nil 1 3)
+          (markdown-unwrap-thing-at-point nil 1 5))
+      (markdown-wrap-or-insert "[[" "]]"))))
+
+(defun markdown-remove-header ()
+  "Remove header markup if point is at a header.
+Return bounds of remaining header text if a header was removed
+and nil otherwise."
+  (interactive "*")
+  (or (markdown-unwrap-thing-at-point markdown-regex-header-atx 0 2)
+      (markdown-unwrap-thing-at-point markdown-regex-header-setext 0 1)))
+
+(defun markdown-insert-header (&optional level text setext)
+  "Insert or replace header markup.
+The level of the header is specified by LEVEL and header text is
+given by TEXT.  LEVEL must be an integer from 1 and 6, and the
+default value is 1.
+When TEXT is nil, the header text is obtained as follows.
+If there is an active region, it is used as the header text.
+Otherwise, the current line will be used as the header text.
+If there is not an active region and the point is at a header,
+remove the header markup and replace with level N header.
+Otherwise, insert empty header markup and place the point in
+between.
+The style of the header will be atx (hash marks) unless
+SETEXT is non-nil, in which case a setext-style (underlined)
+header will be inserted."
+  (interactive "p\nsHeader text: ")
+  (setq level (min (max (or level 1) 1) (if setext 2 6)))
+  ;; Determine header text if not given
+  (when (null text)
+    (if (use-region-p)
+        ;; Active region
+        (setq text (delete-and-extract-region (region-beginning) (region-end)))
+      ;; No active region
+      (markdown-remove-header)
+      (setq text (delete-and-extract-region
+                  (line-beginning-position) (line-end-position)))
+      (when (and setext (string-match-p "^[ \t]*$" text))
+        (setq text (read-string "Header text: "))))
+    (setq text (markdown-compress-whitespace-string text)))
+  ;; Insertion with given text
+  (markdown-ensure-blank-line-before)
+  (let (hdr)
+    (cond (setext
+           (setq hdr (make-string (string-width text) (if (= level 2) ?- ?=)))
+           (insert text "\n" hdr))
+          (t
+           (setq hdr (make-string level ?#))
+           (insert hdr " " text)
+           (when (null markdown-asymmetric-header) (insert " " hdr)))))
+  (markdown-ensure-blank-line-after)
+  ;; Leave point at end of text
+  (cond (setext
+         (backward-char (1+ (string-width text))))
+        ((null markdown-asymmetric-header)
+         (backward-char (1+ level)))))
+
+(defun markdown-insert-header-dwim (&optional arg setext)
+  "Insert or replace header markup.
+The level and type of the header are determined automatically by
+the type and level of the previous header, unless a prefix
+argument is given via ARG.
+With a numeric prefix valued 1 to 6, insert a header of the given
+level, with the type being determined automatically (note that
+only level 1 or 2 setext headers are possible).
+
+With a \\[universal-argument] prefix (i.e., when ARG is (4)),
+promote the heading by one level.
+With two \\[universal-argument] prefixes (i.e., when ARG is (16)),
+demote the heading by one level.
+When SETEXT is non-nil, prefer setext-style headers when
+possible (levels one and two).
+
+When there is an active region, use it for the header text.  When
+the point is at an existing header, change the type and level
+according to the rules above.
+Otherwise, if the line is not empty, create a header using the
+text on the current line as the header text.
+Finally, if the point is on a blank line, insert empty header
+markup (atx) or prompt for text (setext).
+See `markdown-insert-header' for more details about how the
+header text is determined."
+  (interactive "*P")
+  (let (level)
+    (save-excursion
+      (when (or (thing-at-point-looking-at markdown-regex-header)
+                (re-search-backward markdown-regex-header nil t))
+        ;; level of current or previous header
+        (setq level (markdown-outline-level))
+        ;; match group 1 indicates a setext header
+        (setq setext (match-end 1))))
+    ;; check prefix argument
+    (cond
+     ((and (equal arg '(4)) level (> level 1)) ;; C-u
+      (cl-decf level))
+     ((and (equal arg '(16)) level (< level 6)) ;; C-u C-u
+      (cl-incf level))
+     (arg ;; numeric prefix
+      (setq level (prefix-numeric-value arg))))
+    ;; setext headers must be level one or two
+    (and level (setq setext (and setext (<= level 2))))
+    ;; insert the heading
+    (markdown-insert-header level nil setext)))
+
+(defun markdown-insert-header-setext-dwim (&optional arg)
+  "Insert or replace header markup, with preference for setext.
+See `markdown-insert-header-dwim' for details, including how ARG is handled."
+  (interactive "*P")
+  (markdown-insert-header-dwim arg t))
+
+(defun markdown-insert-header-atx-1 ()
+  "Insert a first level atx-style (hash mark) header.
+See `markdown-insert-header'."
+  (interactive "*")
+  (markdown-insert-header 1 nil nil))
+
+(defun markdown-insert-header-atx-2 ()
+  "Insert a level two atx-style (hash mark) header.
+See `markdown-insert-header'."
+  (interactive "*")
+  (markdown-insert-header 2 nil nil))
+
+(defun markdown-insert-header-atx-3 ()
+  "Insert a level three atx-style (hash mark) header.
+See `markdown-insert-header'."
+  (interactive "*")
+  (markdown-insert-header 3 nil nil))
+
+(defun markdown-insert-header-atx-4 ()
+  "Insert a level four atx-style (hash mark) header.
+See `markdown-insert-header'."
+  (interactive "*")
+  (markdown-insert-header 4 nil nil))
+
+(defun markdown-insert-header-atx-5 ()
+  "Insert a level five atx-style (hash mark) header.
+See `markdown-insert-header'."
+  (interactive "*")
+  (markdown-insert-header 5 nil nil))
+
+(defun markdown-insert-header-atx-6 ()
+  "Insert a sixth level atx-style (hash mark) header.
+See `markdown-insert-header'."
+  (interactive "*")
+  (markdown-insert-header 6 nil nil))
+
+(defun markdown-insert-header-setext-1 ()
+  "Insert a setext-style (underlined) first-level header.
+See `markdown-insert-header'."
+  (interactive "*")
+  (markdown-insert-header 1 nil t))
+
+(defun markdown-insert-header-setext-2 ()
+  "Insert a setext-style (underlined) second-level header.
+See `markdown-insert-header'."
+  (interactive "*")
+  (markdown-insert-header 2 nil t))
+
+(defun markdown-blockquote-indentation (loc)
+  "Return string containing necessary indentation for a blockquote at LOC.
+Also see `markdown-pre-indentation'."
+  (save-excursion
+    (goto-char loc)
+    (let* ((list-level (length (markdown-calculate-list-levels)))
+           (indent ""))
+      (dotimes (_ list-level indent)
+        (setq indent (concat indent "    "))))))
+
+(defun markdown-insert-blockquote ()
+  "Start a blockquote section (or blockquote the region).
+If Transient Mark mode is on and a region is active, it is used as
+the blockquote text."
+  (interactive)
+  (if (use-region-p)
+      (markdown-blockquote-region (region-beginning) (region-end))
+    (markdown-ensure-blank-line-before)
+    (insert (markdown-blockquote-indentation (point)) "> ")
+    (markdown-ensure-blank-line-after)))
+
+(defun markdown-block-region (beg end prefix)
+  "Format the region using a block prefix.
+Arguments BEG and END specify the beginning and end of the
+region.  The characters PREFIX will appear at the beginning
+of each line."
+  (save-excursion
+    (let* ((end-marker (make-marker))
+           (beg-marker (make-marker))
+           (prefix-without-trailing-whitespace
+            (replace-regexp-in-string (rx (+ blank) eos) "" prefix)))
+      ;; Ensure blank line after and remove extra whitespace
+      (goto-char end)
+      (skip-syntax-backward "-")
+      (set-marker end-marker (point))
+      (delete-horizontal-space)
+      (markdown-ensure-blank-line-after)
+      ;; Ensure blank line before and remove extra whitespace
+      (goto-char beg)
+      (skip-syntax-forward "-")
+      (delete-horizontal-space)
+      (markdown-ensure-blank-line-before)
+      (set-marker beg-marker (point))
+      ;; Insert PREFIX before each line
+      (goto-char beg-marker)
+      (while (and (< (line-beginning-position) end-marker)
+                  (not (eobp)))
+        ;; Don’t insert trailing whitespace.
+        (insert (if (eolp) prefix-without-trailing-whitespace prefix))
+        (forward-line)))))
+
+(defun markdown-blockquote-region (beg end)
+  "Blockquote the region.
+Arguments BEG and END specify the beginning and end of the region."
+  (interactive "*r")
+  (markdown-block-region
+   beg end (concat (markdown-blockquote-indentation
+                    (max (point-min) (1- beg))) "> ")))
+
+(defun markdown-pre-indentation (loc)
+  "Return string containing necessary whitespace for a pre block at LOC.
+Also see `markdown-blockquote-indentation'."
+  (save-excursion
+    (goto-char loc)
+    (let* ((list-level (length (markdown-calculate-list-levels)))
+           indent)
+      (dotimes (_ (1+ list-level) indent)
+        (setq indent (concat indent "    "))))))
+
+(defun markdown-insert-pre ()
+  "Start a preformatted section (or apply to the region).
+If Transient Mark mode is on and a region is active, it is marked
+as preformatted text."
+  (interactive)
+  (if (use-region-p)
+      (markdown-pre-region (region-beginning) (region-end))
+    (markdown-ensure-blank-line-before)
+    (insert (markdown-pre-indentation (point)))
+    (markdown-ensure-blank-line-after)))
+
+(defun markdown-pre-region (beg end)
+  "Format the region as preformatted text.
+Arguments BEG and END specify the beginning and end of the region."
+  (interactive "*r")
+  (let ((indent (markdown-pre-indentation (max (point-min) (1- beg)))))
+    (markdown-block-region beg end indent)))
+
+(defun markdown-electric-backquote (arg)
+  "Insert a backquote.
+The numeric prefix argument ARG says how many times to repeat the insertion.
+Call `markdown-insert-gfm-code-block' interactively
+if three backquotes inserted at the beginning of line."
+  (interactive "*P")
+  (self-insert-command (prefix-numeric-value arg))
+  (when (and markdown-gfm-use-electric-backquote (looking-back "^```" nil))
+    (replace-match "")
+    (call-interactively #'markdown-insert-gfm-code-block)))
+
+(defconst markdown-gfm-recognized-languages
+  ;; To reproduce/update, evaluate the let-form in
+  ;; scripts/get-recognized-gfm-languages.el. that produces a single long sexp,
+  ;; but with appropriate use of a keyboard macro, indenting and filling it
+  ;; properly is pretty fast.
+  '("1C-Enterprise" "4D" "ABAP" "ABNF" "AGS-Script" "AMPL" "ANTLR"
+    "API-Blueprint" "APL" "ASN.1" "ASP" "ATS" "ActionScript" "Ada"
+    "Adobe-Font-Metrics" "Agda" "Alloy" "Alpine-Abuild" "Altium-Designer"
+    "AngelScript" "Ant-Build-System" "ApacheConf" "Apex"
+    "Apollo-Guidance-Computer" "AppleScript" "Arc" "AsciiDoc" "AspectJ" "Assembly"
+    "Asymptote" "Augeas" "AutoHotkey" "AutoIt" "Awk" "Ballerina" "Batchfile"
+    "Befunge" "BibTeX" "Bison" "BitBake" "Blade" "BlitzBasic" "BlitzMax"
+    "Bluespec" "Boo" "Brainfuck" "Brightscript" "C#" "C++" "C-ObjDump"
+    "C2hs-Haskell" "CLIPS" "CMake" "COBOL" "COLLADA" "CSON" "CSS" "CSV" "CWeb"
+    "Cabal-Config" "Cap'n-Proto" "CartoCSS" "Ceylon" "Chapel" "Charity" "ChucK"
+    "Cirru" "Clarion" "Clean" "Click" "Clojure" "Closure-Templates"
+    "Cloud-Firestore-Security-Rules" "CoNLL-U" "CodeQL" "CoffeeScript"
+    "ColdFusion" "ColdFusion-CFC" "Common-Lisp" "Common-Workflow-Language"
+    "Component-Pascal" "Cool" "Coq" "Cpp-ObjDump" "Creole" "Crystal" "Csound"
+    "Csound-Document" "Csound-Score" "Cuda" "Cycript" "Cython" "D-ObjDump"
+    "DIGITAL-Command-Language" "DM" "DNS-Zone" "DTrace" "Dafny" "Darcs-Patch"
+    "Dart" "DataWeave" "Dhall" "Diff" "DirectX-3D-File" "Dockerfile" "Dogescript"
+    "Dylan" "EBNF" "ECL" "ECLiPSe" "EJS" "EML" "EQ" "Eagle" "Easybuild"
+    "Ecere-Projects" "EditorConfig" "Edje-Data-Collection" "Eiffel" "Elixir" "Elm"
+    "Emacs-Lisp" "EmberScript" "Erlang" "F#" "F*" "FIGlet-Font" "FLUX" "Factor"
+    "Fancy" "Fantom" "Faust" "Filebench-WML" "Filterscript" "Formatted" "Forth"
+    "Fortran" "Fortran-Free-Form" "FreeMarker" "Frege" "G-code" "GAML" "GAMS"
+    "GAP" "GCC-Machine-Description" "GDB" "GDScript" "GEDCOM" "GLSL" "GN"
+    "Game-Maker-Language" "Genie" "Genshi" "Gentoo-Ebuild" "Gentoo-Eclass"
+    "Gerber-Image" "Gettext-Catalog" "Gherkin" "Git-Attributes" "Git-Config"
+    "Glyph" "Glyph-Bitmap-Distribution-Format" "Gnuplot" "Go" "Golo" "Gosu"
+    "Grace" "Gradle" "Grammatical-Framework" "Graph-Modeling-Language" "GraphQL"
+    "Graphviz-(DOT)" "Groovy" "Groovy-Server-Pages" "HAProxy" "HCL" "HLSL" "HTML"
+    "HTML+Django" "HTML+ECR" "HTML+EEX" "HTML+ERB" "HTML+PHP" "HTML+Razor" "HTTP"
+    "HXML" "Hack" "Haml" "Handlebars" "Harbour" "Haskell" "Haxe" "HiveQL" "HolyC"
+    "Hy" "HyPhy" "IDL" "IGOR-Pro" "INI" "IRC-log" "Idris" "Ignore-List" "Inform-7"
+    "Inno-Setup" "Io" "Ioke" "Isabelle" "Isabelle-ROOT" "JFlex" "JSON"
+    "JSON-with-Comments" "JSON5" "JSONLD" "JSONiq" "JSX" "Jasmin" "Java"
+    "Java-Properties" "Java-Server-Pages" "JavaScript" "JavaScript+ERB" "Jison"
+    "Jison-Lex" "Jolie" "Jsonnet" "Julia" "Jupyter-Notebook" "KRL" "KiCad-Layout"
+    "KiCad-Legacy-Layout" "KiCad-Schematic" "Kit" "Kotlin" "LFE" "LLVM" "LOLCODE"
+    "LSL" "LTspice-Symbol" "LabVIEW" "Lasso" "Latte" "Lean" "Less" "Lex"
+    "LilyPond" "Limbo" "Linker-Script" "Linux-Kernel-Module" "Liquid"
+    "Literate-Agda" "Literate-CoffeeScript" "Literate-Haskell" "LiveScript"
+    "Logos" "Logtalk" "LookML" "LoomScript" "Lua" "M4" "M4Sugar" "MATLAB"
+    "MAXScript" "MLIR" "MQL4" "MQL5" "MTML" "MUF" "Macaulay2" "Makefile" "Mako"
+    "Markdown" "Marko" "Mask" "Mathematica" "Maven-POM" "Max" "MediaWiki"
+    "Mercury" "Meson" "Metal" "Microsoft-Developer-Studio-Project" "MiniD" "Mirah"
+    "Modelica" "Modula-2" "Modula-3" "Module-Management-System" "Monkey" "Moocode"
+    "MoonScript" "Motorola-68K-Assembly" "Muse" "Myghty" "NASL" "NCL" "NEON" "NL"
+    "NPM-Config" "NSIS" "Nearley" "Nemerle" "NetLinx" "NetLinx+ERB" "NetLogo"
+    "NewLisp" "Nextflow" "Nginx" "Nim" "Ninja" "Nit" "Nix" "Nu" "NumPy" "OCaml"
+    "ObjDump" "Object-Data-Instance-Notation" "ObjectScript" "Objective-C"
+    "Objective-C++" "Objective-J" "Odin" "Omgrofl" "Opa" "Opal"
+    "Open-Policy-Agent" "OpenCL" "OpenEdge-ABL" "OpenQASM" "OpenRC-runscript"
+    "OpenSCAD" "OpenStep-Property-List" "OpenType-Feature-File" "Org" "Ox"
+    "Oxygene" "Oz" "P4" "PHP" "PLSQL" "PLpgSQL" "POV-Ray-SDL" "Pan" "Papyrus"
+    "Parrot" "Parrot-Assembly" "Parrot-Internal-Representation" "Pascal" "Pawn"
+    "Pep8" "Perl" "Pic" "Pickle" "PicoLisp" "PigLatin" "Pike" "PlantUML" "Pod"
+    "Pod-6" "PogoScript" "Pony" "PostCSS" "PostScript" "PowerBuilder" "PowerShell"
+    "Prisma" "Processing" "Proguard" "Prolog" "Propeller-Spin" "Protocol-Buffer"
+    "Public-Key" "Pug" "Puppet" "Pure-Data" "PureBasic" "PureScript" "Python"
+    "Python-console" "Python-traceback" "QML" "QMake" "Quake" "RAML" "RDoc"
+    "REALbasic" "REXX" "RHTML" "RMarkdown" "RPC" "RPM-Spec" "RUNOFF" "Racket"
+    "Ragel" "Raku" "Rascal" "Raw-token-data" "Readline-Config" "Reason" "Rebol"
+    "Red" "Redcode" "Regular-Expression" "Ren'Py" "RenderScript"
+    "Rich-Text-Format" "Ring" "Riot" "RobotFramework" "Roff" "Roff-Manpage"
+    "Rouge" "Ruby" "Rust" "SAS" "SCSS" "SMT" "SPARQL" "SQF" "SQL" "SQLPL"
+    "SRecode-Template" "SSH-Config" "STON" "SVG" "SWIG" "Sage" "SaltStack" "Sass"
+    "Scala" "Scaml" "Scheme" "Scilab" "Self" "ShaderLab" "Shell" "ShellSession"
+    "Shen" "Slash" "Slice" "Slim" "SmPL" "Smali" "Smalltalk" "Smarty" "Solidity"
+    "SourcePawn" "Spline-Font-Database" "Squirrel" "Stan" "Standard-ML" "Starlark"
+    "Stata" "Stylus" "SubRip-Text" "SugarSS" "SuperCollider" "Svelte" "Swift"
+    "SystemVerilog" "TI-Program" "TLA" "TOML" "TSQL" "TSX" "TXL" "Tcl" "Tcsh"
+    "TeX" "Tea" "Terra" "Texinfo" "Text" "Textile" "Thrift" "Turing" "Turtle"
+    "Twig" "Type-Language" "TypeScript" "Unified-Parallel-C" "Unity3D-Asset"
+    "Unix-Assembly" "Uno" "UnrealScript" "UrWeb" "VBA" "VBScript" "VCL" "VHDL"
+    "Vala" "Verilog" "Vim-Snippet" "Vim-script" "Visual-Basic-.NET" "Volt" "Vue"
+    "Wavefront-Material" "Wavefront-Object" "Web-Ontology-Language" "WebAssembly"
+    "WebIDL" "WebVTT" "Wget-Config" "Windows-Registry-Entries" "Wollok"
+    "World-of-Warcraft-Addon-Data" "X-BitMap" "X-Font-Directory-Index" "X-PixMap"
+    "X10" "XC" "XCompose" "XML" "XML-Property-List" "XPages" "XProc" "XQuery" "XS"
+    "XSLT" "Xojo" "Xtend" "YAML" "YANG" "YARA" "YASnippet" "Yacc" "ZAP" "ZIL"
+    "Zeek" "ZenScript" "Zephir" "Zig" "Zimpl" "cURL-Config" "desktop" "dircolors"
+    "eC" "edn" "fish" "mIRC-Script" "mcfunction" "mupad" "nanorc" "nesC" "ooc"
+    "reStructuredText" "sed" "wdl" "wisp" "xBase")
+  "Language specifiers recognized by GitHub's syntax highlighting features.")
+
+(defvar-local markdown-gfm-used-languages nil
+  "Language names used in GFM code blocks.")
+
+(defun markdown-trim-whitespace (str)
+  (replace-regexp-in-string
+   "\\(?:[[:space:]\r\n]+\\'\\|\\`[[:space:]\r\n]+\\)" "" str))
+
+(defun markdown-clean-language-string (str)
+  (replace-regexp-in-string
+   "{\\.?\\|}" "" (markdown-trim-whitespace str)))
+
+(defun markdown-validate-language-string (widget)
+  (let ((str (widget-value widget)))
+    (unless (string= str (markdown-clean-language-string str))
+      (widget-put widget :error (format "Invalid language spec: '%s'" str))
+      widget)))
+
+(defun markdown-gfm-get-corpus ()
+  "Create corpus of recognized GFM code block languages for the given buffer."
+  (let ((given-corpus (append markdown-gfm-additional-languages
+                              markdown-gfm-recognized-languages)))
+    (append
+     markdown-gfm-used-languages
+     (if markdown-gfm-downcase-languages (cl-mapcar #'downcase given-corpus)
+       given-corpus))))
+
+(defun markdown-gfm-add-used-language (lang)
+  "Clean LANG and add to list of used languages."
+  (setq markdown-gfm-used-languages
+        (cons lang (remove lang markdown-gfm-used-languages))))
+
+(defcustom markdown-spaces-after-code-fence 1
+  "Number of space characters to insert after a code fence.
+\\<gfm-mode-map>\\[markdown-insert-gfm-code-block] inserts this many spaces between an
+opening code fence and an info string."
+  :group 'markdown
+  :type 'integer
+  :safe #'natnump
+  :package-version '(markdown-mode . "2.3"))
+
+(defcustom markdown-code-block-braces nil
+  "When non-nil, automatically insert braces for GFM code blocks."
+  :group 'markdown
+  :type 'boolean)
+
+(defun markdown-insert-gfm-code-block (&optional lang edit)
+  "Insert GFM code block for language LANG.
+If LANG is nil, the language will be queried from user.  If a
+region is active, wrap this region with the markup instead.  If
+the region boundaries are not on empty lines, these are added
+automatically in order to have the correct markup.  When EDIT is
+non-nil (e.g., when \\[universal-argument] is given), edit the
+code block in an indirect buffer after insertion."
+  (interactive
+   (list (let ((completion-ignore-case nil))
+           (condition-case nil
+               (markdown-clean-language-string
+                (completing-read
+                 "Programming language: "
+                 (markdown-gfm-get-corpus)
+                 nil 'confirm (car markdown-gfm-used-languages)
+                 'markdown-gfm-language-history))
+             (quit "")))
+         current-prefix-arg))
+  (unless (string= lang "") (markdown-gfm-add-used-language lang))
+  (when (and (> (length lang) 0)
+             (not markdown-code-block-braces))
+    (setq lang (concat (make-string markdown-spaces-after-code-fence ?\s)
+                       lang)))
+  (let ((gfm-open-brace (if markdown-code-block-braces "{" ""))
+        (gfm-close-brace (if markdown-code-block-braces "}" "")))
+    (if (use-region-p)
+        (let* ((b (region-beginning)) (e (region-end)) end
+               (indent (progn (goto-char b) (current-indentation))))
+          (goto-char e)
+          ;; if we're on a blank line, don't newline, otherwise the ```
+          ;; should go on its own line
+          (unless (looking-back "\n" nil)
+            (newline))
+          (indent-to indent)
+          (insert "```")
+          (markdown-ensure-blank-line-after)
+          (setq end (point))
+          (goto-char b)
+          ;; if we're on a blank line, insert the quotes here, otherwise
+          ;; add a new line first
+          (unless (looking-at-p "\n")
+            (newline)
+            (forward-line -1))
+          (markdown-ensure-blank-line-before)
+          (indent-to indent)
+          (insert "```" gfm-open-brace lang gfm-close-brace)
+          (markdown-syntax-propertize-fenced-block-constructs (line-beginning-position) end))
+      (let ((indent (current-indentation))
+            start-bol)
+        (delete-horizontal-space :backward-only)
+        (markdown-ensure-blank-line-before)
+        (indent-to indent)
+        (setq start-bol (line-beginning-position))
+        (insert "```" gfm-open-brace lang gfm-close-brace "\n")
+        (indent-to indent)
+        (unless edit (insert ?\n))
+        (indent-to indent)
+        (insert "```")
+        (markdown-ensure-blank-line-after)
+        (markdown-syntax-propertize-fenced-block-constructs start-bol (point)))
+      (end-of-line 0)
+      (when edit (markdown-edit-code-block)))))
+
+(defun markdown-code-block-lang (&optional pos-prop)
+  "Return the language name for a GFM or tilde fenced code block.
+The beginning of the block may be described by POS-PROP,
+a cons of (pos . prop) giving the position and property
+at the beginning of the block."
+  (or pos-prop
+      (setq pos-prop
+            (markdown-max-of-seq
+             #'car
+             (cl-remove-if
+              #'null
+              (cl-mapcar
+               #'markdown-find-previous-prop
+               (markdown-get-fenced-block-begin-properties))))))
+  (when pos-prop
+    (goto-char (car pos-prop))
+    (set-match-data (get-text-property (point) (cdr pos-prop)))
+    ;; Note: Hard-coded group number assumes tilde
+    ;; and GFM fenced code regexp groups agree.
+    (let ((begin (match-beginning 3))
+          (end (match-end 3)))
+      (when (and begin end)
+        ;; Fix language strings beginning with periods, like ".ruby".
+        (when (eq (char-after begin) ?.)
+          (setq begin (1+ begin)))
+        (buffer-substring-no-properties begin end)))))
+
+(defun markdown-gfm-parse-buffer-for-languages (&optional buffer)
+  (with-current-buffer (or buffer (current-buffer))
+    (save-excursion
+      (goto-char (point-min))
+      (cl-loop
+       with prop = 'markdown-gfm-block-begin
+       for pos-prop = (markdown-find-next-prop prop)
+       while pos-prop
+       for lang = (markdown-code-block-lang pos-prop)
+       do (progn (when lang (markdown-gfm-add-used-language lang))
+                 (goto-char (next-single-property-change (point) prop)))))))
+
+(defun markdown-insert-foldable-block ()
+  "Insert details disclosure element to make content foldable.
+If a region is active, wrap this region with the disclosure
+element. More detais here https://developer.mozilla.org/en-US/docs/Web/HTML/Element/details."
+  (interactive)
+  (let ((details-open-tag "<details>")
+        (details-close-tag "</details>")
+        (summary-open-tag "<summary>")
+        (summary-close-tag " </summary>"))
+    (if (use-region-p)
+        (let* ((b (region-beginning))
+               (e (region-end))
+               (indent (progn (goto-char b) (current-indentation))))
+          (goto-char e)
+          ;; if we're on a blank line, don't newline, otherwise the tags
+          ;; should go on its own line
+          (unless (looking-back "\n" nil)
+            (newline))
+          (indent-to indent)
+          (insert details-close-tag)
+          (markdown-ensure-blank-line-after)
+          (goto-char b)
+          ;; if we're on a blank line, insert the quotes here, otherwise
+          ;; add a new line first
+          (unless (looking-at-p "\n")
+            (newline)
+            (forward-line -1))
+          (markdown-ensure-blank-line-before)
+          (indent-to indent)
+          (insert details-open-tag "\n")
+          (insert summary-open-tag summary-close-tag)
+          (search-backward summary-close-tag))
+      (let ((indent (current-indentation)))
+        (delete-horizontal-space :backward-only)
+        (markdown-ensure-blank-line-before)
+        (indent-to indent)
+        (insert details-open-tag "\n")
+        (insert summary-open-tag summary-close-tag "\n")
+        (insert details-close-tag)
+        (indent-to indent)
+        (markdown-ensure-blank-line-after)
+        (search-backward summary-close-tag)))))
+
+
+;;; Footnotes =================================================================
+
+(defun markdown-footnote-counter-inc ()
+  "Increment `markdown-footnote-counter' and return the new value."
+  (when (= markdown-footnote-counter 0) ; hasn't been updated in this buffer yet.
+    (save-excursion
+      (goto-char (point-min))
+      (while (re-search-forward (concat "^\\[\\^\\(" markdown-footnote-chars "*?\\)\\]:")
+                                (point-max) t)
+        (let ((fn (string-to-number (match-string 1))))
+          (when (> fn markdown-footnote-counter)
+            (setq markdown-footnote-counter fn))))))
+  (cl-incf markdown-footnote-counter))
+
+(defun markdown-insert-footnote ()
+  "Insert footnote with a new number and move point to footnote definition."
+  (interactive)
+  (let ((fn (markdown-footnote-counter-inc)))
+    (insert (format "[^%d]" fn))
+    (markdown-footnote-text-find-new-location)
+    (markdown-ensure-blank-line-before)
+    (unless (markdown-cur-line-blank-p)
+      (insert "\n"))
+    (insert (format "[^%d]: " fn))
+    (markdown-ensure-blank-line-after)))
+
+(defun markdown-footnote-text-find-new-location ()
+  "Position the point at the proper location for a new footnote text."
+  (cond
+   ((eq markdown-footnote-location 'end) (goto-char (point-max)))
+   ((eq markdown-footnote-location 'immediately) (markdown-end-of-text-block))
+   ((eq markdown-footnote-location 'subtree) (markdown-end-of-subtree))
+   ((eq markdown-footnote-location 'header) (markdown-end-of-defun))))
+
+(defun markdown-footnote-kill ()
+  "Kill the footnote at point.
+The footnote text is killed (and added to the kill ring), the
+footnote marker is deleted.  Point has to be either at the
+footnote marker or in the footnote text."
+  (interactive)
+  (let ((marker-pos nil)
+        (skip-deleting-marker nil)
+        (starting-footnote-text-positions
+         (markdown-footnote-text-positions)))
+    (when starting-footnote-text-positions
+      ;; We're starting in footnote text, so mark our return position and jump
+      ;; to the marker if possible.
+      (let ((marker-pos (markdown-footnote-find-marker
+                         (cl-first starting-footnote-text-positions))))
+        (if marker-pos
+            (goto-char (1- marker-pos))
+          ;; If there isn't a marker, we still want to kill the text.
+          (setq skip-deleting-marker t))))
+    ;; Either we didn't start in the text, or we started in the text and jumped
+    ;; to the marker. We want to assume we're at the marker now and error if
+    ;; we're not.
+    (unless skip-deleting-marker
+      (let ((marker (markdown-footnote-delete-marker)))
+        (unless marker
+          (error "Not at a footnote"))
+        ;; Even if we knew the text position before, it changed when we deleted
+        ;; the label.
+        (setq marker-pos (cl-second marker))
+        (let ((new-text-pos (markdown-footnote-find-text (cl-first marker))))
+          (unless new-text-pos
+            (error "No text for footnote `%s'" (cl-first marker)))
+          (goto-char new-text-pos))))
+    (let ((pos (markdown-footnote-kill-text)))
+      (goto-char (if starting-footnote-text-positions
+                     pos
+                   marker-pos)))))
+
+(defun markdown-footnote-delete-marker ()
+  "Delete a footnote marker at point.
+Returns a list (ID START) containing the footnote ID and the
+start position of the marker before deletion.  If no footnote
+marker was deleted, this function returns NIL."
+  (let ((marker (markdown-footnote-marker-positions)))
+    (when marker
+      (delete-region (cl-second marker) (cl-third marker))
+      (butlast marker))))
+
+(defun markdown-footnote-kill-text ()
+  "Kill footnote text at point.
+Returns the start position of the footnote text before deletion,
+or NIL if point was not inside a footnote text.
+
+The killed text is placed in the kill ring (without the footnote
+number)."
+  (let ((fn (markdown-footnote-text-positions)))
+    (when fn
+      (let ((text (delete-and-extract-region (cl-second fn) (cl-third fn))))
+        (string-match (concat "\\[\\" (cl-first fn) "\\]:[[:space:]]*\\(\\(.*\n?\\)*\\)") text)
+        (kill-new (match-string 1 text))
+        (when (and (markdown-cur-line-blank-p)
+                   (markdown-prev-line-blank-p)
+                   (not (bobp)))
+          (delete-region (1- (point)) (point)))
+        (cl-second fn)))))
+
+(defun markdown-footnote-goto-text ()
+  "Jump to the text of the footnote at point."
+  (interactive)
+  (let ((fn (car (markdown-footnote-marker-positions))))
+    (unless fn
+      (user-error "Not at a footnote marker"))
+    (let ((new-pos (markdown-footnote-find-text fn)))
+      (unless new-pos
+        (error "No definition found for footnote `%s'" fn))
+      (goto-char new-pos))))
+
+(defun markdown-footnote-return ()
+  "Return from a footnote to its footnote number in the main text."
+  (interactive)
+  (let ((fn (save-excursion
+              (car (markdown-footnote-text-positions)))))
+    (unless fn
+      (user-error "Not in a footnote"))
+    (let ((new-pos (markdown-footnote-find-marker fn)))
+      (unless new-pos
+        (error "Footnote marker `%s' not found" fn))
+      (goto-char new-pos))))
+
+(defun markdown-footnote-find-marker (id)
+  "Find the location of the footnote marker with ID.
+The actual buffer position returned is the position directly
+following the marker's closing bracket.  If no marker is found,
+NIL is returned."
+  (save-excursion
+    (goto-char (point-min))
+    (when (re-search-forward (concat "\\[" id "\\]\\([^:]\\|\\'\\)") nil t)
+      (skip-chars-backward "^]")
+      (point))))
+
+(defun markdown-footnote-find-text (id)
+  "Find the location of the text of footnote ID.
+The actual buffer position returned is the position of the first
+character of the text, after the footnote's identifier.  If no
+footnote text is found, NIL is returned."
+  (save-excursion
+    (goto-char (point-min))
+    (when (re-search-forward (concat "^ \\{0,3\\}\\[" id "\\]:") nil t)
+      (skip-chars-forward "[ \t]")
+      (point))))
+
+(defun markdown-footnote-marker-positions ()
+  "Return the position and ID of the footnote marker point is on.
+The return value is a list (ID START END).  If point is not on a
+footnote, NIL is returned."
+  ;; first make sure we're at a footnote marker
+  (if (or (looking-back (concat "\\[\\^" markdown-footnote-chars "*\\]?") (line-beginning-position))
+          (looking-at-p (concat "\\[?\\^" markdown-footnote-chars "*?\\]")))
+      (save-excursion
+        ;; move point between [ and ^:
+        (if (looking-at-p "\\[")
+            (forward-char 1)
+          (skip-chars-backward "^["))
+        (looking-at (concat "\\(\\^" markdown-footnote-chars "*?\\)\\]"))
+        (list (match-string 1) (1- (match-beginning 1)) (1+ (match-end 1))))))
+
+(defun markdown-footnote-text-positions ()
+  "Return the start and end positions of the footnote text point is in.
+The exact return value is a list of three elements: (ID START END).
+The start position is the position of the opening bracket
+of the footnote id.  The end position is directly after the
+newline that ends the footnote.  If point is not in a footnote,
+NIL is returned instead."
+  (save-excursion
+    (let (result)
+      (move-beginning-of-line 1)
+      ;; Try to find the label. If we haven't found the label and we're at a blank
+      ;; or indented line, back up if possible.
+      (while (and
+              (not (and (looking-at markdown-regex-footnote-definition)
+                        (setq result (list (match-string 1) (point)))))
+              (and (not (bobp))
+                   (or (markdown-cur-line-blank-p)
+                       (>= (current-indentation) 4))))
+        (forward-line -1))
+      (when result
+        ;; Advance if there is a next line that is either blank or indented.
+        ;; (Need to check if we're on the last line, because
+        ;; markdown-next-line-blank-p returns true for last line in buffer.)
+        (while (and (/= (line-end-position) (point-max))
+                    (or (markdown-next-line-blank-p)
+                        (>= (markdown-next-line-indent) 4)))
+          (forward-line))
+        ;; Move back while the current line is blank.
+        (while (markdown-cur-line-blank-p)
+          (forward-line -1))
+        ;; Advance to capture this line and a single trailing newline (if there
+        ;; is one).
+        (forward-line)
+        (append result (list (point)))))))
+
+(defun markdown-get-defined-footnotes ()
+  "Return a list of all defined footnotes.
+Result is an alist of pairs (MARKER . LINE), where MARKER is the
+footnote marker, a string, and LINE is the line number containing
+the footnote definition.
+
+For example, suppose the following footnotes are defined at positions
+448 and 475:
+
+\[^1]: First footnote here.
+\[^marker]: Second footnote.
+
+Then the returned list is: ((\"^1\" . 478) (\"^marker\" . 475))"
+  (save-excursion
+    (goto-char (point-min))
+    (let (footnotes)
+      (while (markdown-search-until-condition
+              (lambda () (and (not (markdown-code-block-at-point-p))
+                              (not (markdown-inline-code-at-point-p))
+                              (not (markdown-in-comment-p))))
+              markdown-regex-footnote-definition nil t)
+        (let ((marker (match-string-no-properties 1))
+              (pos (match-beginning 0)))
+          (unless (zerop (length marker))
+            (cl-pushnew (cons marker pos) footnotes :test #'equal))))
+      (reverse footnotes))))
+
+
+;;; Element Removal ===========================================================
+
+(defun markdown-kill-thing-at-point ()
+  "Kill thing at point and add important text, without markup, to kill ring.
+Possible things to kill include (roughly in order of precedence):
+inline code, headers, horizontal rules, links (add link text to
+kill ring), images (add alt text to kill ring), angle uri, email
+addresses, bold, italics, reference definition (add URI to kill
+ring), footnote markers and text (kill both marker and text, add
+text to kill ring), and list items."
+  (interactive "*")
+  (let (val)
+    (cond
+     ;; Inline code
+     ((markdown-inline-code-at-point)
+      (kill-new (match-string 2))
+      (delete-region (match-beginning 0) (match-end 0)))
+     ;; ATX header
+     ((thing-at-point-looking-at markdown-regex-header-atx)
+      (kill-new (match-string 2))
+      (delete-region (match-beginning 0) (match-end 0)))
+     ;; Setext header
+     ((thing-at-point-looking-at markdown-regex-header-setext)
+      (kill-new (match-string 1))
+      (delete-region (match-beginning 0) (match-end 0)))
+     ;; Horizontal rule
+     ((thing-at-point-looking-at markdown-regex-hr)
+      (kill-new (match-string 0))
+      (delete-region (match-beginning 0) (match-end 0)))
+     ;; Inline link or image (add link or alt text to kill ring)
+     ((thing-at-point-looking-at markdown-regex-link-inline)
+      (kill-new (match-string 3))
+      (delete-region (match-beginning 0) (match-end 0)))
+     ;; Reference link or image (add link or alt text to kill ring)
+     ((thing-at-point-looking-at markdown-regex-link-reference)
+      (kill-new (match-string 3))
+      (delete-region (match-beginning 0) (match-end 0)))
+     ;; Angle URI (add URL to kill ring)
+     ((thing-at-point-looking-at markdown-regex-angle-uri)
+      (kill-new (match-string 2))
+      (delete-region (match-beginning 0) (match-end 0)))
+     ;; Email address in angle brackets (add email address to kill ring)
+     ((thing-at-point-looking-at markdown-regex-email)
+      (kill-new (match-string 1))
+      (delete-region (match-beginning 0) (match-end 0)))
+     ;; Wiki link (add alias text to kill ring)
+     ((and markdown-enable-wiki-links
+           (thing-at-point-looking-at markdown-regex-wiki-link))
+      (kill-new (markdown-wiki-link-alias))
+      (delete-region (match-beginning 1) (match-end 1)))
+     ;; Bold
+     ((thing-at-point-looking-at markdown-regex-bold)
+      (kill-new (match-string 4))
+      (delete-region (match-beginning 2) (match-end 2)))
+     ;; Italics
+     ((thing-at-point-looking-at markdown-regex-italic)
+      (kill-new (match-string 3))
+      (delete-region (match-beginning 1) (match-end 1)))
+     ;; Strikethrough
+     ((thing-at-point-looking-at markdown-regex-strike-through)
+      (kill-new (match-string 4))
+      (delete-region (match-beginning 2) (match-end 2)))
+     ;; Footnote marker (add footnote text to kill ring)
+     ((thing-at-point-looking-at markdown-regex-footnote)
+      (markdown-footnote-kill))
+     ;; Footnote text (add footnote text to kill ring)
+     ((setq val (markdown-footnote-text-positions))
+      (markdown-footnote-kill))
+     ;; Reference definition (add URL to kill ring)
+     ((thing-at-point-looking-at markdown-regex-reference-definition)
+      (kill-new (match-string 5))
+      (delete-region (match-beginning 0) (match-end 0)))
+     ;; List item
+     ((setq val (markdown-cur-list-item-bounds))
+      (kill-new (delete-and-extract-region (cl-first val) (cl-second val))))
+     (t
+      (user-error "Nothing found at point to kill")))))
+
+(defun markdown-kill-outline ()
+  "Kill visible heading and add it to `kill-ring'."
+  (interactive)
+  (save-excursion
+    (markdown-outline-previous)
+    (kill-region (point) (progn (markdown-outline-next) (point)))))
+
+(defun markdown-kill-block ()
+  "Kill visible code block, list item, or blockquote and add it to `kill-ring'."
+  (interactive)
+  (save-excursion
+    (markdown-backward-block)
+    (kill-region (point) (progn (markdown-forward-block) (point)))))
+
+
+;;; Indentation ===============================================================
+
+(defun markdown-indent-find-next-position (cur-pos positions)
+  "Return the position after the index of CUR-POS in POSITIONS.
+Positions are calculated by `markdown-calc-indents'."
+  (while (and positions
+              (not (equal cur-pos (car positions))))
+    (setq positions (cdr positions)))
+  (or (cadr positions) 0))
+
+(defun markdown-outdent-find-next-position (cur-pos positions)
+  "Return the maximal element that precedes CUR-POS from POSITIONS.
+Positions are calculated by `markdown-calc-indents'."
+  (let ((result 0))
+    (dolist (i positions)
+      (when (< i cur-pos)
+        (setq result (max result i))))
+    result))
+
+(defun markdown-indent-line ()
+  "Indent the current line using some heuristics.
+If the _previous_ command was either `markdown-enter-key' or
+`markdown-cycle', then we should cycle to the next
+reasonable indentation position.  Otherwise, we could have been
+called directly by `markdown-enter-key', by an initial call of
+`markdown-cycle', or indirectly by `auto-fill-mode'.  In
+these cases, indent to the default position.
+Positions are calculated by `markdown-calc-indents'."
+  (interactive)
+  (let ((positions (markdown-calc-indents))
+        (point-pos (current-column))
+        (_ (back-to-indentation))
+        (cur-pos (current-column)))
+    (if (not (equal this-command 'markdown-cycle))
+        (indent-line-to (car positions))
+      (setq positions (sort (delete-dups positions) '<))
+      (let* ((next-pos (markdown-indent-find-next-position cur-pos positions))
+             (new-point-pos (max (+ point-pos (- next-pos cur-pos)) 0)))
+        (indent-line-to next-pos)
+        (move-to-column new-point-pos)))))
+
+(defun markdown-calc-indents ()
+  "Return a list of indentation columns to cycle through.
+The first element in the returned list should be considered the
+default indentation level.  This function does not worry about
+duplicate positions, which are handled up by calling functions."
+  (let (pos prev-line-pos positions)
+
+    ;; Indentation of previous line
+    (setq prev-line-pos (markdown-prev-line-indent))
+    (setq positions (cons prev-line-pos positions))
+
+    ;; Indentation of previous non-list-marker text
+    (when (setq pos (save-excursion
+                      (forward-line -1)
+                      (when (looking-at markdown-regex-list)
+                        (- (match-end 3) (match-beginning 0)))))
+      (setq positions (cons pos positions)))
+
+    ;; Indentation required for a pre block in current context
+    (setq pos (length (markdown-pre-indentation (point))))
+    (setq positions (cons pos positions))
+
+    ;; Indentation of the previous line + tab-width
+    (if prev-line-pos
+        (setq positions (cons (+ prev-line-pos tab-width) positions))
+      (setq positions (cons tab-width positions)))
+
+    ;; Indentation of the previous line - tab-width
+    (if (and prev-line-pos (> prev-line-pos tab-width))
+        (setq positions (cons (- prev-line-pos tab-width) positions)))
+
+    ;; Indentation of all preceding list markers (when in a list)
+    (when (setq pos (markdown-calculate-list-levels))
+      (setq positions (append pos positions)))
+
+    ;; First column
+    (setq positions (cons 0 positions))
+
+    ;; Return reversed list
+    (reverse positions)))
+
+(defun markdown-enter-key ()        ;FIXME: Partly obsoleted by electric-indent
+  "Handle RET depending on the context.
+If the point is at a table, move to the next row.  Otherwise,
+indent according to value of `markdown-indent-on-enter'.
+When it is nil, simply call `newline'.  Otherwise, indent the next line
+following RET using `markdown-indent-line'.  Furthermore, when it
+is set to \\='indent-and-new-item and the point is in a list item,
+start a new item with the same indentation. If the point is in an
+empty list item, remove it (so that pressing RET twice when in a
+list simply adds a blank line)."
+  (interactive)
+  (cond
+   ;; Table
+   ((markdown-table-at-point-p)
+    (call-interactively #'markdown-table-next-row))
+   ;; Indent non-table text
+   (markdown-indent-on-enter
+    (let (bounds)
+      (if (and (memq markdown-indent-on-enter '(indent-and-new-item))
+               (setq bounds (markdown-cur-list-item-bounds)))
+          (let ((beg (cl-first bounds))
+                (end (cl-second bounds))
+                (length (cl-fourth bounds)))
+            ;; Point is in a list item
+            (if (= (- end beg) length)
+                ;; Delete blank list
+                (progn
+                  (delete-region beg end)
+                  (newline)
+                  (markdown-indent-line))
+              (call-interactively #'markdown-insert-list-item)))
+        ;; Point is not in a list
+        (newline)
+        (markdown-indent-line))))
+   ;; Insert a raw newline
+   (t (newline))))
+
+(defun markdown-outdent-or-delete (arg)
+  "Handle BACKSPACE by cycling through indentation points.
+When BACKSPACE is pressed, if there is only whitespace
+before the current point, then outdent the line one level.
+Otherwise, do normal delete by repeating
+`backward-delete-char-untabify' ARG times."
+  (interactive "*p")
+  (if (use-region-p)
+      (backward-delete-char-untabify arg)
+    (let ((cur-pos (current-column))
+          (start-of-indention (save-excursion
+                                (back-to-indentation)
+                                (current-column)))
+          (positions (markdown-calc-indents)))
+      (if (and (> cur-pos 0) (= cur-pos start-of-indention))
+          (indent-line-to (markdown-outdent-find-next-position cur-pos positions))
+        (backward-delete-char-untabify arg)))))
+
+(defun markdown-find-leftmost-column (beg end)
+  "Find the leftmost column in the region from BEG to END."
+  (let ((mincol 1000))
+    (save-excursion
+      (goto-char beg)
+      (while (< (point) end)
+        (back-to-indentation)
+        (unless (looking-at-p "[ \t]*$")
+          (setq mincol (min mincol (current-column))))
+        (forward-line 1)
+        ))
+    mincol))
+
+(defun markdown-indent-region (beg end arg)
+  "Indent the region from BEG to END using some heuristics.
+When ARG is non-nil, outdent the region instead.
+See `markdown-indent-line' and `markdown-indent-line'."
+  (interactive "*r\nP")
+  (let* ((positions (sort (delete-dups (markdown-calc-indents)) '<))
+         (leftmostcol (markdown-find-leftmost-column beg end))
+         (next-pos (if arg
+                       (markdown-outdent-find-next-position leftmostcol positions)
+                     (markdown-indent-find-next-position leftmostcol positions))))
+    (indent-rigidly beg end (- next-pos leftmostcol))
+    (setq deactivate-mark nil)))
+
+(defun markdown-outdent-region (beg end)
+  "Call `markdown-indent-region' on region from BEG to END with prefix."
+  (interactive "*r")
+  (markdown-indent-region beg end t))
+
+(defun markdown--indent-region (start end)
+  (let ((deactivate-mark nil))
+    (save-excursion
+      (goto-char end)
+      (setq end (point-marker))
+      (goto-char start)
+      (when (bolp)
+        (forward-line 1))
+      (while (< (point) end)
+        (unless (or (markdown-code-block-at-point-p) (and (bolp) (eolp)))
+          (indent-according-to-mode))
+        (forward-line 1))
+      (move-marker end nil))))
+
+
+;;; Markup Completion =========================================================
+
+(defconst markdown-complete-alist
+  '((markdown-regex-header-atx . markdown-complete-atx)
+    (markdown-regex-header-setext . markdown-complete-setext)
+    (markdown-regex-hr . markdown-complete-hr))
+  "Association list of form (regexp . function) for markup completion.")
+
+(defun markdown-incomplete-atx-p ()
+  "Return t if ATX header markup is incomplete and nil otherwise.
+Assumes match data is available for `markdown-regex-header-atx'.
+Checks that the number of trailing hash marks equals the number of leading
+hash marks, that there is only a single space before and after the text,
+and that there is no extraneous whitespace in the text."
+  (or
+   ;; Number of starting and ending hash marks differs
+   (not (= (length (match-string 1)) (length (match-string 3))))
+   ;; When the header text is not empty...
+   (and (> (length (match-string 2)) 0)
+        ;; ...if there are extra leading, trailing, or interior spaces
+        (or (not (= (match-beginning 2) (1+ (match-end 1))))
+            (not (= (match-beginning 3) (1+ (match-end 2))))
+            (string-match-p "[ \t\n]\\{2\\}" (match-string 2))))
+   ;; When the header text is empty...
+   (and (= (length (match-string 2)) 0)
+        ;; ...if there are too many or too few spaces
+        (not (= (match-beginning 3) (+ (match-end 1) 2))))))
+
+(defun markdown-complete-atx ()
+  "Complete and normalize ATX headers.
+Add or remove hash marks to the end of the header to match the
+beginning.  Ensure that there is only a single space between hash
+marks and header text.  Removes extraneous whitespace from header text.
+Assumes match data is available for `markdown-regex-header-atx'.
+Return nil if markup was complete and non-nil if markup was completed."
+  (when (markdown-incomplete-atx-p)
+    (let* ((new-marker (make-marker))
+           (new-marker (set-marker new-marker (match-end 2))))
+      ;; Hash marks and spacing at end
+      (goto-char (match-end 2))
+      (delete-region (match-end 2) (match-end 3))
+      (insert " " (match-string 1))
+      ;; Remove extraneous whitespace from title
+      (replace-match (markdown-compress-whitespace-string (match-string 2))
+                     t t nil 2)
+      ;; Spacing at beginning
+      (goto-char (match-end 1))
+      (delete-region (match-end 1) (match-beginning 2))
+      (insert " ")
+      ;; Leave point at end of text
+      (goto-char new-marker))))
+
+(defun markdown-incomplete-setext-p ()
+  "Return t if setext header markup is incomplete and nil otherwise.
+Assumes match data is available for `markdown-regex-header-setext'.
+Checks that length of underline matches text and that there is no
+extraneous whitespace in the text."
+  (or (not (= (length (match-string 1)) (length (match-string 2))))
+      (string-match-p "[ \t\n]\\{2\\}" (match-string 1))))
+
+(defun markdown-complete-setext ()
+  "Complete and normalize setext headers.
+Add or remove underline characters to match length of header
+text.  Removes extraneous whitespace from header text.  Assumes
+match data is available for `markdown-regex-header-setext'.
+Return nil if markup was complete and non-nil if markup was completed."
+  (when (markdown-incomplete-setext-p)
+    (let* ((text (markdown-compress-whitespace-string (match-string 1)))
+           (char (char-after (match-beginning 2)))
+           (level (if (char-equal char ?-) 2 1)))
+      (goto-char (match-beginning 0))
+      (delete-region (match-beginning 0) (match-end 0))
+      (markdown-insert-header level text t)
+      t)))
+
+(defun markdown-incomplete-hr-p ()
+  "Return non-nil if hr is not in `markdown-hr-strings' and nil otherwise.
+Assumes match data is available for `markdown-regex-hr'."
+  (not (member (match-string 0) markdown-hr-strings)))
+
+(defun markdown-complete-hr ()
+  "Complete horizontal rules.
+If horizontal rule string is a member of `markdown-hr-strings',
+do nothing.  Otherwise, replace with the car of
+`markdown-hr-strings'.
+Assumes match data is available for `markdown-regex-hr'.
+Return nil if markup was complete and non-nil if markup was completed."
+  (when (markdown-incomplete-hr-p)
+    (replace-match (car markdown-hr-strings))
+    t))
+
+(defun markdown-complete ()
+  "Complete markup of object near point or in region when active.
+Handle all objects in `markdown-complete-alist', in order.
+See `markdown-complete-at-point' and `markdown-complete-region'."
+  (interactive "*")
+  (if (use-region-p)
+      (markdown-complete-region (region-beginning) (region-end))
+    (markdown-complete-at-point)))
+
+(defun markdown-complete-at-point ()
+  "Complete markup of object near point.
+Handle all elements of `markdown-complete-alist' in order."
+  (interactive "*")
+  (let ((list markdown-complete-alist) found changed)
+    (while list
+      (let ((regexp (eval (caar list) t)) ;FIXME: Why `eval'?
+            (function (cdar list)))
+        (setq list (cdr list))
+        (when (thing-at-point-looking-at regexp)
+          (setq found t)
+          (setq changed (funcall function))
+          (setq list nil))))
+    (if found
+        (or changed (user-error "Markup at point is complete"))
+      (user-error "Nothing to complete at point"))))
+
+(defun markdown-complete-region (beg end)
+  "Complete markup of objects in region from BEG to END.
+Handle all objects in `markdown-complete-alist', in order.  Each
+match is checked to ensure that a previous regexp does not also
+match."
+  (interactive "*r")
+  (let ((end-marker (set-marker (make-marker) end))
+        previous)
+    (dolist (element markdown-complete-alist)
+      (let ((regexp (eval (car element) t)) ;FIXME: Why `eval'?
+            (function (cdr element)))
+        (goto-char beg)
+        (while (re-search-forward regexp end-marker 'limit)
+          (when (match-string 0)
+            ;; Make sure this is not a match for any of the preceding regexps.
+            ;; This prevents mistaking an HR for a Setext subheading.
+            (let (match)
+              (save-match-data
+                (dolist (prev-regexp previous)
+                  (or match (setq match (looking-back prev-regexp nil)))))
+              (unless match
+                (save-excursion (funcall function))))))
+        (cl-pushnew regexp previous :test #'equal)))
+    previous))
+
+(defun markdown-complete-buffer ()
+  "Complete markup for all objects in the current buffer."
+  (interactive "*")
+  (markdown-complete-region (point-min) (point-max)))
+
+
+;;; Markup Cycling ============================================================
+
+(defun markdown-cycle-atx (arg &optional remove)
+  "Cycle ATX header markup.
+Promote header (decrease level) when ARG is 1 and demote
+header (increase level) if arg is -1.  When REMOVE is non-nil,
+remove the header when the level reaches zero and stop cycling
+when it reaches six.  Otherwise, perform a proper cycling through
+levels one through six.  Assumes match data is available for
+`markdown-regex-header-atx'."
+  (let* ((old-level (length (match-string 1)))
+         (new-level (+ old-level arg))
+         (text (match-string 2)))
+    (when (not remove)
+      (setq new-level (% new-level 6))
+      (setq new-level (cond ((= new-level 0) 6)
+                            ((< new-level 0) (+ new-level 6))
+                            (t new-level))))
+    (cond
+     ((= new-level 0)
+      (markdown-unwrap-thing-at-point nil 0 2))
+     ((<= new-level 6)
+      (goto-char (match-beginning 0))
+      (delete-region (match-beginning 0) (match-end 0))
+      (markdown-insert-header new-level text nil)))))
+
+(defun markdown-cycle-setext (arg &optional remove)
+  "Cycle setext header markup.
+Promote header (increase level) when ARG is 1 and demote
+header (decrease level or remove) if arg is -1.  When demoting a
+level-two setext header, replace with a level-three atx header.
+When REMOVE is non-nil, remove the header when the level reaches
+zero.  Otherwise, cycle back to a level six atx header.  Assumes
+match data is available for `markdown-regex-header-setext'."
+  (let* ((char (char-after (match-beginning 2)))
+         (old-level (if (char-equal char ?=) 1 2))
+         (new-level (+ old-level arg)))
+    (when (and (not remove) (= new-level 0))
+      (setq new-level 6))
+    (cond
+     ((= new-level 0)
+      (markdown-unwrap-thing-at-point nil 0 1))
+     ((<= new-level 2)
+      (markdown-insert-header new-level nil t))
+     ((<= new-level 6)
+      (markdown-insert-header new-level nil nil)))))
+
+(defun markdown-cycle-hr (arg &optional remove)
+  "Cycle string used for horizontal rule from `markdown-hr-strings'.
+When ARG is 1, cycle forward (demote), and when ARG is -1, cycle
+backwards (promote).  When REMOVE is non-nil, remove the hr instead
+of cycling when the end of the list is reached.
+Assumes match data is available for `markdown-regex-hr'."
+  (let* ((strings (if (= arg -1)
+                      (reverse markdown-hr-strings)
+                    markdown-hr-strings))
+         (tail (member (match-string 0) strings))
+         (new (or (cadr tail)
+                  (if remove
+                      (if (= arg 1)
+                          ""
+                        (car tail))
+                    (car strings)))))
+    (replace-match new)))
+
+(defun markdown-cycle-bold ()
+  "Cycle bold markup between underscores and asterisks.
+Assumes match data is available for `markdown-regex-bold'."
+  (save-excursion
+    (let* ((old-delim (match-string 3))
+           (new-delim (if (string-equal old-delim "**") "__" "**")))
+      (replace-match new-delim t t nil 3)
+      (replace-match new-delim t t nil 5))))
+
+(defun markdown-cycle-italic ()
+  "Cycle italic markup between underscores and asterisks.
+Assumes match data is available for `markdown-regex-italic'."
+  (save-excursion
+    (let* ((old-delim (match-string 2))
+           (new-delim (if (string-equal old-delim "*") "_" "*")))
+      (replace-match new-delim t t nil 2)
+      (replace-match new-delim t t nil 4))))
+
+
+;;; Keymap ====================================================================
+
+(defun markdown--style-map-prompt ()
+  "Return a formatted prompt for Markdown markup insertion."
+  (when markdown-enable-prefix-prompts
+    (concat
+     "Markdown: "
+     (propertize "bold" 'face 'markdown-bold-face) ", "
+     (propertize "italic" 'face 'markdown-italic-face) ", "
+     (propertize "code" 'face 'markdown-inline-code-face) ", "
+     (propertize "C = GFM code" 'face 'markdown-code-face) ", "
+     (propertize "pre" 'face 'markdown-pre-face) ", "
+     (propertize "footnote" 'face 'markdown-footnote-text-face) ", "
+     (propertize "F = foldable" 'face 'markdown-bold-face) ", "
+     (propertize "q = blockquote" 'face 'markdown-blockquote-face) ", "
+     (propertize "h & 1-6 = heading" 'face 'markdown-header-face) ", "
+     (propertize "- = hr" 'face 'markdown-hr-face) ", "
+     "C-h = more")))
+
+(defun markdown--command-map-prompt ()
+  "Return prompt for Markdown buffer-wide commands."
+  (when markdown-enable-prefix-prompts
+    (concat
+     "Command: "
+     (propertize "m" 'face 'markdown-bold-face) "arkdown, "
+     (propertize "p" 'face 'markdown-bold-face) "review, "
+     (propertize "o" 'face 'markdown-bold-face) "pen, "
+     (propertize "e" 'face 'markdown-bold-face) "xport, "
+     "export & pre" (propertize "v" 'face 'markdown-bold-face) "iew, "
+     (propertize "c" 'face 'markdown-bold-face) "heck refs, "
+     (propertize "u" 'face 'markdown-bold-face) "nused refs, "
+     "C-h = more")))
+
+(defvar markdown-mode-style-map
+  (let ((map (make-keymap (markdown--style-map-prompt))))
+    (define-key map (kbd "1") 'markdown-insert-header-atx-1)
+    (define-key map (kbd "2") 'markdown-insert-header-atx-2)
+    (define-key map (kbd "3") 'markdown-insert-header-atx-3)
+    (define-key map (kbd "4") 'markdown-insert-header-atx-4)
+    (define-key map (kbd "5") 'markdown-insert-header-atx-5)
+    (define-key map (kbd "6") 'markdown-insert-header-atx-6)
+    (define-key map (kbd "!") 'markdown-insert-header-setext-1)
+    (define-key map (kbd "@") 'markdown-insert-header-setext-2)
+    (define-key map (kbd "b") 'markdown-insert-bold)
+    (define-key map (kbd "c") 'markdown-insert-code)
+    (define-key map (kbd "C") 'markdown-insert-gfm-code-block)
+    (define-key map (kbd "f") 'markdown-insert-footnote)
+    (define-key map (kbd "F") 'markdown-insert-foldable-block)
+    (define-key map (kbd "h") 'markdown-insert-header-dwim)
+    (define-key map (kbd "H") 'markdown-insert-header-setext-dwim)
+    (define-key map (kbd "i") 'markdown-insert-italic)
+    (define-key map (kbd "k") 'markdown-insert-kbd)
+    (define-key map (kbd "l") 'markdown-insert-link)
+    (define-key map (kbd "p") 'markdown-insert-pre)
+    (define-key map (kbd "P") 'markdown-pre-region)
+    (define-key map (kbd "q") 'markdown-insert-blockquote)
+    (define-key map (kbd "s") 'markdown-insert-strike-through)
+    (define-key map (kbd "t") 'markdown-insert-table)
+    (define-key map (kbd "Q") 'markdown-blockquote-region)
+    (define-key map (kbd "w") 'markdown-insert-wiki-link)
+    (define-key map (kbd "-") 'markdown-insert-hr)
+    (define-key map (kbd "[") 'markdown-insert-gfm-checkbox)
+    ;; Deprecated keys that may be removed in a future version
+    (define-key map (kbd "e") 'markdown-insert-italic)
+    map)
+  "Keymap for Markdown text styling commands.")
+
+(defvar markdown-mode-command-map
+  (let ((map (make-keymap (markdown--command-map-prompt))))
+    (define-key map (kbd "m") 'markdown-other-window)
+    (define-key map (kbd "p") 'markdown-preview)
+    (define-key map (kbd "e") 'markdown-export)
+    (define-key map (kbd "v") 'markdown-export-and-preview)
+    (define-key map (kbd "o") 'markdown-open)
+    (define-key map (kbd "l") 'markdown-live-preview-mode)
+    (define-key map (kbd "w") 'markdown-kill-ring-save)
+    (define-key map (kbd "c") 'markdown-check-refs)
+    (define-key map (kbd "u") 'markdown-unused-refs)
+    (define-key map (kbd "n") 'markdown-cleanup-list-numbers)
+    (define-key map (kbd "]") 'markdown-complete-buffer)
+    (define-key map (kbd "^") 'markdown-table-sort-lines)
+    (define-key map (kbd "|") 'markdown-table-convert-region)
+    (define-key map (kbd "t") 'markdown-table-transpose)
+    map)
+  "Keymap for Markdown buffer-wide commands.")
+
+(defvar markdown-mode-map
+  (let ((map (make-keymap)))
+    ;; Markup insertion & removal
+    (define-key map (kbd "C-c C-s") markdown-mode-style-map)
+    (define-key map (kbd "C-c C-l") 'markdown-insert-link)
+    (define-key map (kbd "C-c C-k") 'markdown-kill-thing-at-point)
+    ;; Promotion, demotion, and cycling
+    (define-key map (kbd "C-c C--") 'markdown-promote)
+    (define-key map (kbd "C-c C-=") 'markdown-demote)
+    (define-key map (kbd "C-c C-]") 'markdown-complete)
+    ;; Following and doing things
+    (define-key map (kbd "C-c C-o") 'markdown-follow-thing-at-point)
+    (define-key map (kbd "C-c C-d") 'markdown-do)
+    (define-key map (kbd "C-c '") 'markdown-edit-code-block)
+    ;; Indentation
+    (define-key map (kbd "RET") 'markdown-enter-key)
+    (define-key map (kbd "DEL") 'markdown-outdent-or-delete)
+    (define-key map (kbd "C-c >") 'markdown-indent-region)
+    (define-key map (kbd "C-c <") 'markdown-outdent-region)
+    ;; Visibility cycling
+    (define-key map (kbd "TAB") 'markdown-cycle)
+    ;; S-iso-lefttab and S-tab should both be mapped to `backtab' by
+    ;; (local-)function-key-map.
+    ;;(define-key map (kbd "<S-iso-lefttab>") 'markdown-shifttab)
+    ;;(define-key map (kbd "<S-tab>")  'markdown-shifttab)
+    (define-key map (kbd "<backtab>") 'markdown-shifttab)
+    ;; Heading and list navigation
+    (define-key map (kbd "C-c C-n") 'markdown-outline-next)
+    (define-key map (kbd "C-c C-p") 'markdown-outline-previous)
+    (define-key map (kbd "C-c C-f") 'markdown-outline-next-same-level)
+    (define-key map (kbd "C-c C-b") 'markdown-outline-previous-same-level)
+    (define-key map (kbd "C-c C-u") 'markdown-outline-up)
+    ;; Buffer-wide commands
+    (define-key map (kbd "C-c C-c") markdown-mode-command-map)
+    ;; Subtree, list, and table editing
+    (define-key map (kbd "C-c <up>") 'markdown-move-up)
+    (define-key map (kbd "C-c <down>") 'markdown-move-down)
+    (define-key map (kbd "C-c <left>") 'markdown-promote)
+    (define-key map (kbd "C-c <right>") 'markdown-demote)
+    (define-key map (kbd "C-c S-<up>") 'markdown-table-delete-row)
+    (define-key map (kbd "C-c S-<down>") 'markdown-table-insert-row)
+    (define-key map (kbd "C-c S-<left>") 'markdown-table-delete-column)
+    (define-key map (kbd "C-c S-<right>") 'markdown-table-insert-column)
+    (define-key map (kbd "C-c C-M-h") 'markdown-mark-subtree)
+    (define-key map (kbd "C-x n s") 'markdown-narrow-to-subtree)
+    (define-key map (kbd "M-RET") 'markdown-insert-list-item)
+    (define-key map (kbd "C-c C-j") 'markdown-insert-list-item)
+    ;; Paragraphs (Markdown context aware)
+    (define-key map [remap backward-paragraph] 'markdown-backward-paragraph)
+    (define-key map [remap forward-paragraph] 'markdown-forward-paragraph)
+    (define-key map [remap mark-paragraph] 'markdown-mark-paragraph)
+    ;; Blocks (one or more paragraphs)
+    (define-key map (kbd "C-M-{") 'markdown-backward-block)
+    (define-key map (kbd "C-M-}") 'markdown-forward-block)
+    (define-key map (kbd "C-c M-h") 'markdown-mark-block)
+    (define-key map (kbd "C-x n b") 'markdown-narrow-to-block)
+    ;; Pages (top-level sections)
+    (define-key map [remap backward-page] 'markdown-backward-page)
+    (define-key map [remap forward-page] 'markdown-forward-page)
+    (define-key map [remap mark-page] 'markdown-mark-page)
+    (define-key map [remap narrow-to-page] 'markdown-narrow-to-page)
+    ;; Link Movement
+    (define-key map (kbd "M-n") 'markdown-next-link)
+    (define-key map (kbd "M-p") 'markdown-previous-link)
+    ;; Toggling functionality
+    (define-key map (kbd "C-c C-x C-e") 'markdown-toggle-math)
+    (define-key map (kbd "C-c C-x C-f") 'markdown-toggle-fontify-code-blocks-natively)
+    (define-key map (kbd "C-c C-x C-i") 'markdown-toggle-inline-images)
+    (define-key map (kbd "C-c C-x C-l") 'markdown-toggle-url-hiding)
+    (define-key map (kbd "C-c C-x C-m") 'markdown-toggle-markup-hiding)
+    ;; Alternative keys (in case of problems with the arrow keys)
+    (define-key map (kbd "C-c C-x u") 'markdown-move-up)
+    (define-key map (kbd "C-c C-x d") 'markdown-move-down)
+    (define-key map (kbd "C-c C-x l") 'markdown-promote)
+    (define-key map (kbd "C-c C-x r") 'markdown-demote)
+    ;; Deprecated keys that may be removed in a future version
+    (define-key map (kbd "C-c C-a L") 'markdown-insert-link) ;; C-c C-l
+    (define-key map (kbd "C-c C-a l") 'markdown-insert-link) ;; C-c C-l
+    (define-key map (kbd "C-c C-a r") 'markdown-insert-link) ;; C-c C-l
+    (define-key map (kbd "C-c C-a u") 'markdown-insert-uri) ;; C-c C-l
+    (define-key map (kbd "C-c C-a f") 'markdown-insert-footnote)
+    (define-key map (kbd "C-c C-a w") 'markdown-insert-wiki-link)
+    (define-key map (kbd "C-c C-t 1") 'markdown-insert-header-atx-1)
+    (define-key map (kbd "C-c C-t 2") 'markdown-insert-header-atx-2)
+    (define-key map (kbd "C-c C-t 3") 'markdown-insert-header-atx-3)
+    (define-key map (kbd "C-c C-t 4") 'markdown-insert-header-atx-4)
+    (define-key map (kbd "C-c C-t 5") 'markdown-insert-header-atx-5)
+    (define-key map (kbd "C-c C-t 6") 'markdown-insert-header-atx-6)
+    (define-key map (kbd "C-c C-t !") 'markdown-insert-header-setext-1)
+    (define-key map (kbd "C-c C-t @") 'markdown-insert-header-setext-2)
+    (define-key map (kbd "C-c C-t h") 'markdown-insert-header-dwim)
+    (define-key map (kbd "C-c C-t H") 'markdown-insert-header-setext-dwim)
+    (define-key map (kbd "C-c C-t s") 'markdown-insert-header-setext-2)
+    (define-key map (kbd "C-c C-t t") 'markdown-insert-header-setext-1)
+    (define-key map (kbd "C-c C-i") 'markdown-insert-image)
+    (define-key map (kbd "C-c C-x m") 'markdown-insert-list-item) ;; C-c C-j
+    (define-key map (kbd "C-c C-x C-x") 'markdown-toggle-gfm-checkbox) ;; C-c C-d
+    (define-key map (kbd "C-c -") 'markdown-insert-hr)
+    map)
+  "Keymap for Markdown major mode.")
+
+(defvar markdown-mode-mouse-map
+  (when markdown-mouse-follow-link
+    (let ((map (make-sparse-keymap)))
+      (define-key map [follow-link] 'mouse-face)
+      (define-key map [mouse-2] #'markdown-follow-thing-at-point)
+      map))
+  "Keymap for following links with mouse.")
+
+(defvar gfm-mode-map
+  (let ((map (make-sparse-keymap)))
+    (set-keymap-parent map markdown-mode-map)
+    (define-key map (kbd "C-c C-s d") 'markdown-insert-strike-through)
+    (define-key map "`" 'markdown-electric-backquote)
+    map)
+  "Keymap for `gfm-mode'.
+See also `markdown-mode-map'.")
+
+
+;;; Menu ======================================================================
+
+(easy-menu-define markdown-mode-menu markdown-mode-map
+  "Menu for Markdown mode."
+  '("Markdown"
+    "---"
+    ("Movement"
+     ["Jump" markdown-do]
+     ["Follow Link" markdown-follow-thing-at-point]
+     ["Next Link" markdown-next-link]
+     ["Previous Link" markdown-previous-link]
+     "---"
+     ["Next Heading or List Item" markdown-outline-next]
+     ["Previous Heading or List Item" markdown-outline-previous]
+     ["Next at Same Level" markdown-outline-next-same-level]
+     ["Previous at Same Level" markdown-outline-previous-same-level]
+     ["Up to Parent" markdown-outline-up]
+     "---"
+     ["Forward Paragraph" markdown-forward-paragraph]
+     ["Backward Paragraph" markdown-backward-paragraph]
+     ["Forward Block" markdown-forward-block]
+     ["Backward Block" markdown-backward-block])
+    ("Show & Hide"
+     ["Cycle Heading Visibility" markdown-cycle
+      :enable (markdown-on-heading-p)]
+     ["Cycle Heading Visibility (Global)" markdown-shifttab]
+     "---"
+     ["Narrow to Region" narrow-to-region]
+     ["Narrow to Block" markdown-narrow-to-block]
+     ["Narrow to Section" narrow-to-defun]
+     ["Narrow to Subtree" markdown-narrow-to-subtree]
+     ["Widen" widen (buffer-narrowed-p)]
+     "---"
+     ["Toggle Markup Hiding" markdown-toggle-markup-hiding
+      :keys "C-c C-x C-m"
+      :style radio
+      :selected markdown-hide-markup])
+    "---"
+    ("Headings & Structure"
+     ["Automatic Heading" markdown-insert-header-dwim
+      :keys "C-c C-s h"]
+     ["Automatic Heading (Setext)" markdown-insert-header-setext-dwim
+      :keys "C-c C-s H"]
+     ("Specific Heading (atx)"
+      ["First Level atx" markdown-insert-header-atx-1
+       :keys "C-c C-s 1"]
+      ["Second Level atx" markdown-insert-header-atx-2
+       :keys "C-c C-s 2"]
+      ["Third Level atx" markdown-insert-header-atx-3
+       :keys "C-c C-s 3"]
+      ["Fourth Level atx" markdown-insert-header-atx-4
+       :keys "C-c C-s 4"]
+      ["Fifth Level atx" markdown-insert-header-atx-5
+       :keys "C-c C-s 5"]
+      ["Sixth Level atx" markdown-insert-header-atx-6
+       :keys "C-c C-s 6"])
+     ("Specific Heading (Setext)"
+      ["First Level Setext" markdown-insert-header-setext-1
+       :keys "C-c C-s !"]
+      ["Second Level Setext" markdown-insert-header-setext-2
+       :keys "C-c C-s @"])
+     ["Horizontal Rule" markdown-insert-hr
+      :keys "C-c C-s -"]
+     "---"
+     ["Move Subtree Up" markdown-move-up
+      :keys "C-c <up>"]
+     ["Move Subtree Down" markdown-move-down
+      :keys "C-c <down>"]
+     ["Promote Subtree" markdown-promote
+      :keys "C-c <left>"]
+     ["Demote Subtree" markdown-demote
+      :keys "C-c <right>"])
+    ("Region & Mark"
+     ["Indent Region" markdown-indent-region]
+     ["Outdent Region" markdown-outdent-region]
+     "--"
+     ["Mark Paragraph" mark-paragraph]
+     ["Mark Block" markdown-mark-block]
+     ["Mark Section" mark-defun]
+     ["Mark Subtree" markdown-mark-subtree])
+    ("Tables"
+     ["Move Row Up" markdown-move-up
+      :enable (markdown-table-at-point-p)
+      :keys "C-c <up>"]
+     ["Move Row Down" markdown-move-down
+      :enable (markdown-table-at-point-p)
+      :keys "C-c <down>"]
+     ["Move Column Left" markdown-promote
+      :enable (markdown-table-at-point-p)
+      :keys "C-c <left>"]
+     ["Move Column Right" markdown-demote
+      :enable (markdown-table-at-point-p)
+      :keys "C-c <right>"]
+     ["Delete Row" markdown-table-delete-row
+      :enable (markdown-table-at-point-p)]
+     ["Insert Row" markdown-table-insert-row
+      :enable (markdown-table-at-point-p)]
+     ["Delete Column" markdown-table-delete-column
+      :enable (markdown-table-at-point-p)]
+     ["Insert Column" markdown-table-insert-column
+      :enable (markdown-table-at-point-p)]
+     ["Insert Table" markdown-insert-table]
+     "--"
+     ["Convert Region to Table" markdown-table-convert-region]
+     ["Sort Table Lines" markdown-table-sort-lines
+      :enable (markdown-table-at-point-p)]
+     ["Transpose Table" markdown-table-transpose
+      :enable (markdown-table-at-point-p)])
+    ("Lists"
+     ["Insert List Item" markdown-insert-list-item]
+     ["Move Subtree Up" markdown-move-up
+      :keys "C-c <up>"]
+     ["Move Subtree Down" markdown-move-down
+      :keys "C-c <down>"]
+     ["Indent Subtree" markdown-demote
+      :keys "C-c <right>"]
+     ["Outdent Subtree" markdown-promote
+      :keys "C-c <left>"]
+     ["Renumber List" markdown-cleanup-list-numbers]
+     ["Insert Task List Item" markdown-insert-gfm-checkbox
+      :keys "C-c C-x ["]
+     ["Toggle Task List Item" markdown-toggle-gfm-checkbox
+      :enable (markdown-gfm-task-list-item-at-point)
+      :keys "C-c C-d"])
+    ("Links & Images"
+     ["Insert Link" markdown-insert-link]
+     ["Insert Image" markdown-insert-image]
+     ["Insert Footnote" markdown-insert-footnote
+      :keys "C-c C-s f"]
+     ["Insert Wiki Link" markdown-insert-wiki-link
+      :keys "C-c C-s w"]
+     "---"
+     ["Check References" markdown-check-refs]
+     ["Find Unused References" markdown-unused-refs]
+     ["Toggle URL Hiding" markdown-toggle-url-hiding
+      :style radio
+      :selected markdown-hide-urls]
+     ["Toggle Inline Images" markdown-toggle-inline-images
+      :keys "C-c C-x C-i"
+      :style radio
+      :selected markdown-inline-image-overlays]
+     ["Toggle Wiki Links" markdown-toggle-wiki-links
+      :style radio
+      :selected markdown-enable-wiki-links])
+    ("Styles"
+     ["Bold" markdown-insert-bold]
+     ["Italic" markdown-insert-italic]
+     ["Code" markdown-insert-code]
+     ["Strikethrough" markdown-insert-strike-through]
+     ["Keyboard" markdown-insert-kbd]
+     "---"
+     ["Blockquote" markdown-insert-blockquote]
+     ["Preformatted" markdown-insert-pre]
+     ["GFM Code Block" markdown-insert-gfm-code-block]
+     ["Edit Code Block" markdown-edit-code-block
+      :enable (markdown-code-block-at-point-p)]
+     ["Foldable Block" markdown-insert-foldable-block]
+     "---"
+     ["Blockquote Region" markdown-blockquote-region]
+     ["Preformatted Region" markdown-pre-region]
+     "---"
+     ["Fontify Code Blocks Natively"
+      markdown-toggle-fontify-code-blocks-natively
+      :style radio
+      :selected markdown-fontify-code-blocks-natively]
+     ["LaTeX Math Support" markdown-toggle-math
+      :style radio
+      :selected markdown-enable-math])
+    "---"
+    ("Preview & Export"
+     ["Compile" markdown-other-window]
+     ["Preview" markdown-preview]
+     ["Export" markdown-export]
+     ["Export & View" markdown-export-and-preview]
+     ["Open" markdown-open]
+     ["Live Export" markdown-live-preview-mode
+      :style radio
+      :selected markdown-live-preview-mode]
+     ["Kill ring save" markdown-kill-ring-save])
+    ("Markup Completion and Cycling"
+     ["Complete Markup" markdown-complete]
+     ["Promote Element" markdown-promote
+      :keys "C-c C--"]
+     ["Demote Element" markdown-demote
+      :keys "C-c C-="])
+    "---"
+    ["Kill Element" markdown-kill-thing-at-point]
+    "---"
+    ("Documentation"
+     ["Version" markdown-show-version]
+     ["Homepage" markdown-mode-info]
+     ["Describe Mode" (describe-function 'markdown-mode)]
+     ["Guide" (browse-url "https://leanpub.com/markdown-mode")])))
+
+
+;;; imenu =====================================================================
+
+(defun markdown-imenu-create-nested-index ()
+  "Create and return a nested imenu index alist for the current buffer.
+See `imenu-create-index-function' and `imenu--index-alist' for details."
+  (let* ((root '(nil . nil))
+         (min-level 9999)
+         hashes headers)
+    (save-excursion
+      ;; Headings
+      (goto-char (point-min))
+      (while (re-search-forward markdown-regex-header (point-max) t)
+        (unless (or (markdown-code-block-at-point-p)
+                    (and (match-beginning 3)
+                         (get-text-property (match-beginning 3) 'markdown-yaml-metadata-end)))
+          (cond
+           ((match-string-no-properties 2) ;; level 1 setext
+            (setq min-level 1)
+            (push (list :heading (match-string-no-properties 1)
+                        :point (match-beginning 1)
+                        :level 1) headers))
+           ((match-string-no-properties 3) ;; level 2 setext
+            (setq min-level (min min-level 2))
+            (push (list :heading (match-string-no-properties 1)
+                        :point (match-beginning 1)
+                        :level (- 2 (1- min-level))) headers))
+           ((setq hashes (markdown-trim-whitespace
+                          (match-string-no-properties 4)))
+            (setq min-level (min min-level (length hashes)))
+            (push (list :heading (match-string-no-properties 5)
+                        :point (match-beginning 4)
+                        :level (- (length hashes) (1- min-level))) headers)))))
+      (cl-loop with cur-level = 0
+               with cur-alist = nil
+               with empty-heading = "-"
+               with self-heading = "."
+               for header in (reverse headers)
+               for level = (plist-get header :level)
+               do
+               (let ((alist (list (cons (plist-get header :heading) (plist-get header :point)))))
+                 (cond
+                  ((= cur-level level)  ; new sibling
+                   (setcdr cur-alist alist)
+                   (setq cur-alist alist))
+                  ((< cur-level level)  ; first child
+                   (dotimes (_ (- level cur-level 1))
+                     (setq alist (list (cons empty-heading alist))))
+                   (if cur-alist
+                       (let* ((parent (car cur-alist))
+                              (self-pos (cdr parent)))
+                         (setcdr parent (cons (cons self-heading self-pos) alist)))
+                     (setcdr root alist)) ; primogenitor
+                   (setq cur-alist alist)
+                   (setq cur-level level))
+                  (t                    ; new sibling of an ancestor
+                   (let ((sibling-alist (last (cdr root))))
+                     (dotimes (_ (1- level))
+                       (setq sibling-alist (last (cdar sibling-alist))))
+                     (setcdr sibling-alist alist)
+                     (setq cur-alist alist))
+                   (setq cur-level level)))))
+      (setq root (copy-tree root))
+      ;; Footnotes
+      (let ((fn (markdown-get-defined-footnotes)))
+        (if (or (zerop (length fn))
+                (null markdown-add-footnotes-to-imenu))
+            (cdr root)
+          (nconc (cdr root) (list (cons "Footnotes" fn))))))))
+
+(defun markdown-imenu-create-flat-index ()
+  "Create and return a flat imenu index alist for the current buffer.
+See `imenu-create-index-function' and `imenu--index-alist' for details."
+  (let* ((empty-heading "-") index heading pos)
+    (save-excursion
+      ;; Headings
+      (goto-char (point-min))
+      (while (re-search-forward markdown-regex-header (point-max) t)
+        (when (and (not (markdown-code-block-at-point-p (line-beginning-position)))
+                   (not (markdown-text-property-at-point 'markdown-yaml-metadata-begin)))
+          (cond
+           ((setq heading (match-string-no-properties 1))
+            (setq pos (match-beginning 1)))
+           ((setq heading (match-string-no-properties 5))
+            (setq pos (match-beginning 4))))
+          (or (> (length heading) 0)
+              (setq heading empty-heading))
+          (setq index (append index (list (cons heading pos))))))
+      ;; Footnotes
+      (when markdown-add-footnotes-to-imenu
+        (nconc index (markdown-get-defined-footnotes)))
+      index)))
+
+
+;;; References ================================================================
+
+(defun markdown-reference-goto-definition ()
+  "Jump to the definition of the reference at point or create it."
+  (interactive)
+  (when (thing-at-point-looking-at markdown-regex-link-reference)
+    (let* ((text (match-string-no-properties 3))
+           (reference (match-string-no-properties 6))
+           (target (downcase (if (string= reference "") text reference)))
+           (loc (cadr (save-match-data (markdown-reference-definition target)))))
+      (if loc
+          (goto-char loc)
+        (goto-char (match-beginning 0))
+        (markdown-insert-reference-definition target)))))
+
+(defun markdown-reference-find-links (reference)
+  "Return a list of all links for REFERENCE.
+REFERENCE should not include the surrounding square brackets.
+Elements of the list have the form (text start line), where
+text is the link text, start is the location at the beginning of
+the link, and line is the line number on which the link appears."
+  (let* ((ref-quote (regexp-quote reference))
+         (regexp (format "!?\\(?:\\[\\(%s\\)\\][ ]?\\[\\]\\|\\[\\([^]]+?\\)\\][ ]?\\[%s\\]\\)"
+                         ref-quote ref-quote))
+         links)
+    (save-excursion
+      (goto-char (point-min))
+      (while (re-search-forward regexp nil t)
+        (let* ((text (or (match-string-no-properties 1)
+                         (match-string-no-properties 2)))
+               (start (match-beginning 0))
+               (line (markdown-line-number-at-pos)))
+          (cl-pushnew (list text start line) links :test #'equal))))
+    links))
+
+(defmacro markdown-for-all-refs (f)
+  `(let ((result))
+     (save-excursion
+       (goto-char (point-min))
+       (while
+           (re-search-forward markdown-regex-link-reference nil t)
+         (let* ((text (match-string-no-properties 3))
+                (reference (match-string-no-properties 6))
+                (target (downcase (if (string= reference "") text reference))))
+           (,f text target result))))
+     (reverse result)))
+
+(defmacro markdown-collect-always (_ target result)
+  `(cl-pushnew ,target ,result :test #'equal))
+
+(defmacro markdown-collect-undefined (text target result)
+  `(unless (markdown-reference-definition target)
+     (let ((entry (assoc ,target ,result)))
+       (if (not entry)
+           (cl-pushnew
+            (cons ,target (list (cons ,text (markdown-line-number-at-pos))))
+            ,result :test #'equal)
+         (setcdr entry
+                 (append (cdr entry) (list (cons ,text (markdown-line-number-at-pos)))))))))
+
+(defun markdown-get-all-refs ()
+  "Return a list of all Markdown references."
+  (markdown-for-all-refs markdown-collect-always))
+
+(defun markdown-get-undefined-refs ()
+  "Return a list of undefined Markdown references.
+Result is an alist of pairs (reference . occurrences), where
+occurrences is itself another alist of pairs (label . line-number).
+For example, an alist corresponding to [Nice editor][Emacs] at line 12,
+\[GNU Emacs][Emacs] at line 45 and [manual][elisp] at line 127 is
+\((\"emacs\" (\"Nice editor\" . 12) (\"GNU Emacs\" . 45)) (\"elisp\" (\"manual\" . 127)))."
+  (markdown-for-all-refs markdown-collect-undefined))
+
+(defun markdown-get-unused-refs ()
+  (cl-sort
+   (cl-set-difference
+    (markdown-get-defined-references) (markdown-get-all-refs)
+    :test (lambda (e1 e2) (equal (car e1) e2)))
+   #'< :key #'cdr))
+
+(defmacro defun-markdown-buffer (name docstring)
+  "Define a function to name and return a buffer.
+
+By convention, NAME must be a name of a string constant with
+%buffer% placeholder used to name the buffer, and will also be
+used as a name of the function defined.
+
+DOCSTRING will be used as the first part of the docstring."
+  `(defun ,name (&optional buffer-name)
+     ,(concat docstring "\n\nBUFFER-NAME is the name of the main buffer being visited.")
+     (or buffer-name (setq buffer-name (buffer-name)))
+     (let ((refbuf (get-buffer-create (replace-regexp-in-string
+                                       "%buffer%" buffer-name
+                                       ,name))))
+       (with-current-buffer refbuf
+         (when view-mode
+           (View-exit-and-edit))
+         (use-local-map button-buffer-map)
+         (erase-buffer))
+       refbuf)))
+
+(defconst markdown-reference-check-buffer
+  "*Undefined references for %buffer%*"
+  "Pattern for name of buffer for listing undefined references.
+The string %buffer% will be replaced by the corresponding
+`markdown-mode' buffer name.")
+
+(defun-markdown-buffer
+  markdown-reference-check-buffer
+  "Name and return buffer for reference checking.")
+
+(defconst markdown-unused-references-buffer
+  "*Unused references for %buffer%*"
+  "Pattern for name of buffer for listing unused references.
+The string %buffer% will be replaced by the corresponding
+`markdown-mode' buffer name.")
+
+(defun-markdown-buffer
+  markdown-unused-references-buffer
+  "Name and return buffer for unused reference checking.")
+
+(defconst markdown-reference-links-buffer
+  "*Reference links for %buffer%*"
+  "Pattern for name of buffer for listing references.
+The string %buffer% will be replaced by the corresponding buffer name.")
+
+(defun-markdown-buffer
+  markdown-reference-links-buffer
+  "Name, setup, and return a buffer for listing links.")
+
+;; Add an empty Markdown reference definition to buffer
+;; specified in the 'target-buffer property.  The reference name is
+;; the button's label.
+(define-button-type 'markdown-undefined-reference-button
+  'help-echo "mouse-1, RET: create definition for undefined reference"
+  'follow-link t
+  'face 'bold
+  'action (lambda (b)
+            (let ((buffer (button-get b 'target-buffer))
+                  (line (button-get b 'target-line))
+                  (label (button-label b)))
+              (switch-to-buffer-other-window buffer)
+              (goto-char (point-min))
+              (forward-line line)
+              (markdown-insert-reference-definition label)
+              (markdown-check-refs t))))
+
+;; Jump to line in buffer specified by 'target-buffer property.
+;; Line number is button's 'target-line property.
+(define-button-type 'markdown-goto-line-button
+  'help-echo "mouse-1, RET: go to line"
+  'follow-link t
+  'face 'italic
+  'action (lambda (b)
+            (switch-to-buffer-other-window (button-get b 'target-buffer))
+            ;; use call-interactively to silence compiler
+            (let ((current-prefix-arg (button-get b 'target-line)))
+              (call-interactively 'goto-line))))
+
+;; Kill a line in buffer specified by 'target-buffer property.
+;; Line number is button's 'target-line property.
+(define-button-type 'markdown-kill-line-button
+  'help-echo "mouse-1, RET: kill line"
+  'follow-link t
+  'face 'italic
+  'action (lambda (b)
+            (switch-to-buffer-other-window (button-get b 'target-buffer))
+            ;; use call-interactively to silence compiler
+            (let ((current-prefix-arg (button-get b 'target-line)))
+              (call-interactively 'goto-line))
+            (kill-line 1)
+            (markdown-unused-refs t)))
+
+;; Jumps to a particular link at location given by 'target-char
+;; property in buffer given by 'target-buffer property.
+(define-button-type 'markdown-location-button
+  'help-echo "mouse-1, RET: jump to location of link"
+  'follow-link t
+  'face 'bold
+  'action (lambda (b)
+            (let ((target (button-get b 'target-buffer))
+                  (loc (button-get b 'target-char)))
+              (kill-buffer-and-window)
+              (switch-to-buffer target)
+              (goto-char loc))))
+
+(defun markdown-insert-undefined-reference-button (reference oldbuf)
+  "Insert a button for creating REFERENCE in buffer OLDBUF.
+REFERENCE should be a list of the form (reference . occurrences),
+as returned by `markdown-get-undefined-refs'."
+  (let ((label (car reference)))
+    ;; Create a reference button
+    (insert-button label
+                   :type 'markdown-undefined-reference-button
+                   'target-buffer oldbuf
+                   'target-line (cdr (car (cdr reference))))
+    (insert " (")
+    (dolist (occurrence (cdr reference))
+      (let ((line (cdr occurrence)))
+        ;; Create a line number button
+        (insert-button (number-to-string line)
+                       :type 'markdown-goto-line-button
+                       'target-buffer oldbuf
+                       'target-line line)
+        (insert " ")))
+    (delete-char -1)
+    (insert ")")
+    (newline)))
+
+(defun markdown-insert-unused-reference-button (reference oldbuf)
+  "Insert a button for creating REFERENCE in buffer OLDBUF.
+REFERENCE must be a pair of (ref . line-number)."
+  (let ((label (car reference))
+        (line (cdr reference)))
+    ;; Create a reference button
+    (insert-button label
+                   :type 'markdown-goto-line-button
+                   'face 'bold
+                   'target-buffer oldbuf
+                   'target-line line)
+    (insert (format " (%d) [" line))
+    (insert-button "X"
+                   :type 'markdown-kill-line-button
+                   'face 'bold
+                   'target-buffer oldbuf
+                   'target-line line)
+    (insert "]")
+    (newline)))
+
+(defun markdown-insert-link-button (link oldbuf)
+  "Insert a button for jumping to LINK in buffer OLDBUF.
+LINK should be a list of the form (text char line) containing
+the link text, location, and line number."
+  (let ((label (cl-first link))
+        (char (cl-second link))
+        (line (cl-third link)))
+    ;; Create a reference button
+    (insert-button label
+                   :type 'markdown-location-button
+                   'target-buffer oldbuf
+                   'target-char char)
+    (insert (format " (line %d)\n" line))))
+
+(defun markdown-reference-goto-link (&optional reference)
+  "Jump to the location of the first use of REFERENCE."
+  (interactive)
+  (unless reference
+    (if (thing-at-point-looking-at markdown-regex-reference-definition)
+        (setq reference (match-string-no-properties 2))
+      (user-error "No reference definition at point")))
+  (let ((links (markdown-reference-find-links reference)))
+    (cond ((= (length links) 1)
+           (goto-char (cadr (car links))))
+          ((> (length links) 1)
+           (let ((oldbuf (current-buffer))
+                 (linkbuf (markdown-reference-links-buffer)))
+             (with-current-buffer linkbuf
+               (insert "Links using reference " reference ":\n\n")
+               (dolist (link (reverse links))
+                 (markdown-insert-link-button link oldbuf)))
+             (view-buffer-other-window linkbuf)
+             (goto-char (point-min))
+             (forward-line 2)))
+          (t
+           (error "No links for reference %s" reference)))))
+
+(defmacro defun-markdown-ref-checker
+    (name docstring checker-function buffer-function none-message buffer-header insert-reference)
+  "Define a function NAME acting on result of CHECKER-FUNCTION.
+
+DOCSTRING is used as a docstring for the defined function.
+
+BUFFER-FUNCTION should name and return an auxiliary buffer to put
+results in.
+
+NONE-MESSAGE is used when CHECKER-FUNCTION returns no results.
+
+BUFFER-HEADER is put into the auxiliary buffer first, followed by
+calling INSERT-REFERENCE for each element in the list returned by
+CHECKER-FUNCTION."
+  `(defun ,name (&optional silent)
+     ,(concat
+       docstring
+       "\n\nIf SILENT is non-nil, do not message anything when no
+such references found.")
+     (interactive "P")
+     (unless (derived-mode-p 'markdown-mode)
+       (user-error "Not available in current mode"))
+     (let ((oldbuf (current-buffer))
+           (refs (,checker-function))
+           (refbuf (,buffer-function)))
+       (if (null refs)
+           (progn
+             (when (not silent)
+               (message ,none-message))
+             (kill-buffer refbuf))
+         (with-current-buffer refbuf
+           (insert ,buffer-header)
+           (dolist (ref refs)
+             (,insert-reference ref oldbuf))
+           (view-buffer-other-window refbuf)
+           (goto-char (point-min))
+           (forward-line 2))))))
+
+(defun-markdown-ref-checker
+  markdown-check-refs
+  "Show all undefined Markdown references in current `markdown-mode' buffer.
+
+Links which have empty reference definitions are considered to be
+defined."
+  markdown-get-undefined-refs
+  markdown-reference-check-buffer
+  "No undefined references found"
+  "The following references are undefined:\n\n"
+  markdown-insert-undefined-reference-button)
+
+
+(defun-markdown-ref-checker
+  markdown-unused-refs
+  "Show all unused Markdown references in current `markdown-mode' buffer."
+  markdown-get-unused-refs
+  markdown-unused-references-buffer
+  "No unused references found"
+  "The following references are unused:\n\n"
+  markdown-insert-unused-reference-button)
+
+
+
+;;; Lists =====================================================================
+
+(defun markdown-insert-list-item (&optional arg)
+  "Insert a new list item.
+If the point is inside unordered list, insert a bullet mark.  If
+the point is inside ordered list, insert the next number followed
+by a period.  Use the previous list item to determine the amount
+of whitespace to place before and after list markers.
+
+With a \\[universal-argument] prefix (i.e., when ARG is (4)),
+decrease the indentation by one level.
+
+With two \\[universal-argument] prefixes (i.e., when ARG is (16)),
+increase the indentation by one level."
+  (interactive "p")
+  (let (bounds cur-indent marker indent new-indent new-loc)
+    (save-match-data
+      ;; Look for a list item on current or previous non-blank line
+      (save-excursion
+        (while (and (not (setq bounds (markdown-cur-list-item-bounds)))
+                    (not (bobp))
+                    (markdown-cur-line-blank-p))
+          (forward-line -1)))
+      (when bounds
+        (cond ((save-excursion
+                 (skip-chars-backward " \t")
+                 (looking-at-p markdown-regex-list))
+               (beginning-of-line)
+               (insert "\n")
+               (forward-line -1))
+              ((not (markdown-cur-line-blank-p))
+               (newline)))
+        (setq new-loc (point)))
+      ;; Look ahead for a list item on next non-blank line
+      (unless bounds
+        (save-excursion
+          (while (and (null bounds)
+                      (not (eobp))
+                      (markdown-cur-line-blank-p))
+            (forward-line)
+            (setq bounds (markdown-cur-list-item-bounds))))
+        (when bounds
+          (setq new-loc (point))
+          (unless (markdown-cur-line-blank-p)
+            (newline))))
+      (if (not bounds)
+          ;; When not in a list, start a new unordered one
+          (progn
+            (unless (markdown-cur-line-blank-p)
+              (insert "\n"))
+            (insert markdown-unordered-list-item-prefix))
+        ;; Compute indentation and marker for new list item
+        (setq cur-indent (nth 2 bounds))
+        (setq marker (nth 4 bounds))
+        ;; If current item is a GFM checkbox, insert new unchecked checkbox.
+        (when (nth 5 bounds)
+          (setq marker
+                (concat marker
+                        (replace-regexp-in-string "[Xx]" " " (nth 5 bounds)))))
+        (cond
+         ;; Dedent: decrement indentation, find previous marker.
+         ((= arg 4)
+          (setq indent (max (- cur-indent markdown-list-indent-width) 0))
+          (let ((prev-bounds
+                 (save-excursion
+                   (goto-char (nth 0 bounds))
+                   (when (markdown-up-list)
+                     (markdown-cur-list-item-bounds)))))
+            (when prev-bounds
+              (setq marker (nth 4 prev-bounds)))))
+         ;; Indent: increment indentation by 4, use same marker.
+         ((= arg 16) (setq indent (+ cur-indent markdown-list-indent-width)))
+         ;; Same level: keep current indentation and marker.
+         (t (setq indent cur-indent)))
+        (setq new-indent (make-string indent 32))
+        (goto-char new-loc)
+        (cond
+         ;; Ordered list
+         ((string-match-p "[0-9]" marker)
+          (if (= arg 16) ;; starting a new column indented one more level
+              (insert (concat new-indent "1. "))
+            ;; Don't use previous match-data
+            (set-match-data nil)
+            ;; travel up to the last item and pick the correct number.  If
+            ;; the argument was nil, "new-indent = cur-indent" is the same,
+            ;; so we don't need special treatment. Neat.
+            (save-excursion
+              (while (and (not (looking-at (concat new-indent "\\([0-9]+\\)\\(\\.[ \t]*\\)")))
+                          (>= (forward-line -1) 0))))
+            (let* ((old-prefix (match-string 1))
+                   (old-spacing (match-string 2))
+                   (new-prefix (if (and old-prefix markdown-ordered-list-enumeration)
+                                   (int-to-string (1+ (string-to-number old-prefix)))
+                                 "1"))
+                   (space-adjust (- (length old-prefix) (length new-prefix)))
+                   (new-spacing (if (and (match-string 2)
+                                         (not (string-match-p "\t" old-spacing))
+                                         (< space-adjust 0)
+                                         (> space-adjust (- 1 (length (match-string 2)))))
+                                    (substring (match-string 2) 0 space-adjust)
+                                  (or old-spacing ". "))))
+              (insert (concat new-indent new-prefix new-spacing)))))
+         ;; Unordered list, GFM task list, or ordered list with hash mark
+         ((string-match-p "[\\*\\+-]\\|#\\." marker)
+          (insert new-indent marker))))
+      ;; Propertize the newly inserted list item now
+      (markdown-syntax-propertize-list-items (line-beginning-position) (line-end-position)))))
+
+(defun markdown-move-list-item-up ()
+  "Move the current list item up in the list when possible.
+In nested lists, move child items with the parent item."
+  (interactive)
+  (let (cur prev old)
+    (when (setq cur (markdown-cur-list-item-bounds))
+      (setq old (point))
+      (goto-char (nth 0 cur))
+      (if (markdown-prev-list-item (nth 3 cur))
+          (progn
+            (setq prev (markdown-cur-list-item-bounds))
+            (condition-case nil
+                (progn
+                  (transpose-regions (nth 0 prev) (nth 1 prev)
+                                     (nth 0 cur) (nth 1 cur) t)
+                  (goto-char (+ (nth 0 prev) (- old (nth 0 cur)))))
+              ;; Catch error in case regions overlap.
+              (error (goto-char old))))
+        (goto-char old)))))
+
+(defun markdown-move-list-item-down ()
+  "Move the current list item down in the list when possible.
+In nested lists, move child items with the parent item."
+  (interactive)
+  (let (cur next old)
+    (when (setq cur (markdown-cur-list-item-bounds))
+      (setq old (point))
+      (if (markdown-next-list-item (nth 3 cur))
+          (progn
+            (setq next (markdown-cur-list-item-bounds))
+            (condition-case nil
+                (progn
+                  (transpose-regions (nth 0 cur) (nth 1 cur)
+                                     (nth 0 next) (nth 1 next) nil)
+                  (goto-char (+ old (- (nth 1 next) (nth 1 cur)))))
+              ;; Catch error in case regions overlap.
+              (error (goto-char old))))
+        (goto-char old)))))
+
+(defun markdown-demote-list-item (&optional bounds)
+  "Indent (or demote) the current list item.
+Optionally, BOUNDS of the current list item may be provided if available.
+In nested lists, demote child items as well."
+  (interactive)
+  (when (or bounds (setq bounds (markdown-cur-list-item-bounds)))
+    (save-excursion
+      (let* ((item-start (set-marker (make-marker) (nth 0 bounds)))
+             (item-end (set-marker (make-marker) (nth 1 bounds)))
+             (list-start (progn (markdown-beginning-of-list)
+                                (set-marker (make-marker) (point))))
+             (list-end (progn (markdown-end-of-list)
+                              (set-marker (make-marker) (point)))))
+        (goto-char item-start)
+        (while (< (point) item-end)
+          (unless (markdown-cur-line-blank-p)
+            (insert (make-string markdown-list-indent-width ? )))
+          (forward-line))
+        (markdown-syntax-propertize-list-items list-start list-end)))))
+
+(defun markdown-promote-list-item (&optional bounds)
+  "Unindent (or promote) the current list item.
+Optionally, BOUNDS of the current list item may be provided if available.
+In nested lists, demote child items as well."
+  (interactive)
+  (when (or bounds (setq bounds (markdown-cur-list-item-bounds)))
+    (save-excursion
+      (save-match-data
+        (let ((item-start (set-marker (make-marker) (nth 0 bounds)))
+              (item-end (set-marker (make-marker) (nth 1 bounds)))
+              (list-start (progn (markdown-beginning-of-list)
+                                 (set-marker (make-marker) (point))))
+              (list-end (progn (markdown-end-of-list)
+                               (set-marker (make-marker) (point))))
+              num regexp)
+          (goto-char item-start)
+          (when (looking-at (format "^[ ]\\{1,%d\\}"
+                                    markdown-list-indent-width))
+            (setq num (- (match-end 0) (match-beginning 0)))
+            (setq regexp (format "^[ ]\\{1,%d\\}" num))
+            (while (and (< (point) item-end)
+                        (re-search-forward regexp item-end t))
+              (replace-match "" nil nil)
+              (forward-line))
+            (markdown-syntax-propertize-list-items list-start list-end)))))))
+
+(defun markdown-cleanup-list-numbers-level (&optional pfx prev-item)
+  "Update the numbering for level PFX (as a string of spaces) and PREV-ITEM.
+PREV-ITEM is width of previous-indentation and list number
+
+Assume that the previously found match was for a numbered item in
+a list."
+  (let ((cpfx pfx)
+        (cur-item nil)
+        (idx 0)
+        (continue t)
+        (step t)
+        (sep nil))
+    (while (and continue (not (eobp)))
+      (setq step t)
+      (cond
+       ((looking-at "^\\(\\([\s-]*\\)[0-9]+\\)\\. ")
+        (setq cpfx (match-string-no-properties 2))
+        (setq cur-item (match-string-no-properties 1)) ;; indentation and list marker
+        (cond
+         ((or (= (length cpfx) (length pfx))
+              (= (length cur-item) (length prev-item)))
+          (save-excursion
+            (replace-match
+             (if (not markdown-ordered-list-enumeration)
+                 (concat pfx "1. ")
+               (cl-incf idx)
+               (concat pfx (number-to-string idx) ". "))))
+          (setq sep nil))
+         ;; indented a level
+         ((< (length pfx) (length cpfx))
+          (setq sep (markdown-cleanup-list-numbers-level cpfx cur-item))
+          (setq step nil))
+         ;; exit the loop
+         (t
+          (setq step nil)
+          (setq continue nil))))
+
+       ((looking-at "^\\([\s-]*\\)[^ \t\n\r].*$")
+        (setq cpfx (match-string-no-properties 1))
+        (cond
+         ;; reset if separated before
+         ((string= cpfx pfx) (when sep (setq idx 0)))
+         ((string< cpfx pfx)
+          (setq step nil)
+          (setq continue nil))))
+       (t (setq sep t)))
+
+      (when step
+        (beginning-of-line)
+        (setq continue (= (forward-line) 0))))
+    sep))
+
+(defun markdown-cleanup-list-numbers ()
+  "Update the numbering of ordered lists."
+  (interactive)
+  (save-excursion
+    (goto-char (point-min))
+    (markdown-cleanup-list-numbers-level "")))
+
+
+;;; Movement ==================================================================
+
+(defun markdown-beginning-of-defun (&optional arg)
+  "`beginning-of-defun-function' for Markdown.
+This is used to find the beginning of the defun and should behave
+like ‘beginning-of-defun’, returning non-nil if it found the
+beginning of a defun.  It moves the point backward, right before a
+heading which defines a defun.  When ARG is non-nil, repeat that
+many times.  When ARG is negative, move forward to the ARG-th
+following section."
+  (or arg (setq arg 1))
+  (when (< arg 0) (end-of-line))
+  ;; Adjust position for setext headings.
+  (when (and (thing-at-point-looking-at markdown-regex-header-setext)
+             (not (= (point) (match-beginning 0)))
+             (not (markdown-code-block-at-point-p)))
+    (goto-char (match-end 0)))
+  (let (found)
+    ;; Move backward with positive argument.
+    (while (and (not (bobp)) (> arg 0))
+      (setq found nil)
+      (while (and (not found)
+                  (not (bobp))
+                  (re-search-backward markdown-regex-header nil 'move))
+        (when (not (markdown-code-block-at-pos (match-beginning 0))))
+        (setq found (match-beginning 0)))
+      (setq arg (1- arg)))
+    ;; Move forward with negative argument.
+    (while (and (not (eobp)) (< arg 0))
+      (setq found nil)
+      (while (and (not found)
+                  (not (eobp))
+                  (re-search-forward markdown-regex-header nil 'move))
+        (when (not (markdown-code-block-at-pos (match-beginning 0))))
+        (setq found (match-beginning 0)))
+      (setq arg (1+ arg)))
+    (when found
+      (beginning-of-line)
+      t)))
+
+(defun markdown-end-of-defun ()
+  "`end-of-defun-function’ for Markdown.
+This is used to find the end of the defun at point.
+It is called with no argument, right after calling ‘beginning-of-defun-raw’,
+so it can assume that point is at the beginning of the defun body.
+It should move point to the first position after the defun."
+  (or (eobp) (forward-char 1))
+  (let (found)
+    (while (and (not found)
+                (not (eobp))
+                (re-search-forward markdown-regex-header nil 'move))
+      (when (not (markdown-code-block-at-pos (match-beginning 0)))
+        (setq found (match-beginning 0))))
+    (when found
+      (goto-char found)
+      (skip-syntax-backward "-"))))
+
+(defun markdown-beginning-of-text-block ()
+  "Move backward to previous beginning of a plain text block.
+This function simply looks for blank lines without considering
+the surrounding context in light of Markdown syntax.  For that, see
+`markdown-backward-block'."
+  (interactive)
+  (let ((start (point)))
+    (if (re-search-backward markdown-regex-block-separator nil t)
+        (goto-char (match-end 0))
+      (goto-char (point-min)))
+    (when (and (= start (point)) (not (bobp)))
+      (forward-line -1)
+      (if (re-search-backward markdown-regex-block-separator nil t)
+          (goto-char (match-end 0))
+        (goto-char (point-min))))))
+
+(defun markdown-end-of-text-block ()
+  "Move forward to next beginning of a plain text block.
+This function simply looks for blank lines without considering
+the surrounding context in light of Markdown syntax.  For that, see
+`markdown-forward-block'."
+  (interactive)
+  (beginning-of-line)
+  (skip-chars-forward " \t\n")
+  (when (= (point) (point-min))
+    (forward-char))
+  (if (re-search-forward markdown-regex-block-separator nil t)
+      (goto-char (match-end 0))
+    (goto-char (point-max)))
+  (skip-chars-backward " \t\n")
+  (forward-line))
+
+(defun markdown-backward-paragraph (&optional arg)
+  "Move the point to the start of the current paragraph.
+With argument ARG, do it ARG times; a negative argument ARG = -N
+means move forward N blocks."
+  (interactive "^p")
+  (or arg (setq arg 1))
+  (if (< arg 0)
+      (markdown-forward-paragraph (- arg))
+    (dotimes (_ arg)
+      ;; Skip over whitespace in between paragraphs when moving backward.
+      (skip-chars-backward " \t\n")
+      (beginning-of-line)
+      ;; Skip over code block endings.
+      (when (markdown-range-properties-exist
+             (line-beginning-position) (line-end-position)
+             '(markdown-gfm-block-end
+               markdown-tilde-fence-end))
+        (forward-line -1))
+      ;; Skip over blank lines inside blockquotes.
+      (while (and (not (eobp))
+                  (looking-at markdown-regex-blockquote)
+                  (= (length (match-string 3)) 0))
+        (forward-line -1))
+      ;; Proceed forward based on the type of block of paragraph.
+      (let (bounds skip)
+        (cond
+         ;; Blockquotes
+         ((looking-at markdown-regex-blockquote)
+          (while (and (not (bobp))
+                      (looking-at markdown-regex-blockquote)
+                      (> (length (match-string 3)) 0)) ;; not blank
+            (forward-line -1))
+          (forward-line))
+         ;; List items
+         ((setq bounds (markdown-cur-list-item-bounds))
+          (goto-char (nth 0 bounds)))
+         ;; Other
+         (t
+          (while (and (not (bobp))
+                      (not skip)
+                      (not (markdown-cur-line-blank-p))
+                      (not (looking-at markdown-regex-blockquote))
+                      (not (markdown-range-properties-exist
+                            (line-beginning-position) (line-end-position)
+                            '(markdown-gfm-block-end
+                              markdown-tilde-fence-end))))
+            (setq skip (markdown-range-properties-exist
+                        (line-beginning-position) (line-end-position)
+                        '(markdown-gfm-block-begin
+                          markdown-tilde-fence-begin)))
+            (forward-line -1))
+          (unless (bobp)
+            (forward-line 1))))))))
+
+(defun markdown-forward-paragraph (&optional arg)
+  "Move forward to the next end of a paragraph.
+With argument ARG, do it ARG times; a negative argument ARG = -N
+means move backward N blocks."
+  (interactive "^p")
+  (or arg (setq arg 1))
+  (if (< arg 0)
+      (markdown-backward-paragraph (- arg))
+    (dotimes (_ arg)
+      ;; Skip whitespace in between paragraphs.
+      (when (markdown-cur-line-blank-p)
+        (skip-syntax-forward "-")
+        (beginning-of-line))
+      ;; Proceed forward based on the type of block.
+      (let (bounds skip)
+        (cond
+         ;; Blockquotes
+         ((looking-at markdown-regex-blockquote)
+          ;; Skip over blank lines inside blockquotes.
+          (while (and (not (eobp))
+                      (looking-at markdown-regex-blockquote)
+                      (= (length (match-string 3)) 0))
+            (forward-line))
+          ;; Move to end of quoted text block
+          (while (and (not (eobp))
+                      (looking-at markdown-regex-blockquote)
+                      (> (length (match-string 3)) 0)) ;; not blank
+            (forward-line)))
+         ;; List items
+         ((and (markdown-cur-list-item-bounds)
+               (setq bounds (markdown-next-list-item-bounds)))
+          (goto-char (nth 0 bounds)))
+         ;; Other
+         (t
+          (forward-line)
+          (while (and (not (eobp))
+                      (not skip)
+                      (not (markdown-cur-line-blank-p))
+                      (not (looking-at markdown-regex-blockquote))
+                      (not (markdown-range-properties-exist
+                            (line-beginning-position) (line-end-position)
+                            '(markdown-gfm-block-begin
+                              markdown-tilde-fence-begin))))
+            (setq skip (markdown-range-properties-exist
+                        (line-beginning-position) (line-end-position)
+                        '(markdown-gfm-block-end
+                          markdown-tilde-fence-end)))
+            (forward-line))))))))
+
+(defun markdown-backward-block (&optional arg)
+  "Move the point to the start of the current Markdown block.
+Moves across complete code blocks, list items, and blockquotes,
+but otherwise stops at blank lines, headers, and horizontal
+rules.  With argument ARG, do it ARG times; a negative argument
+ARG = -N means move forward N blocks."
+  (interactive "^p")
+  (or arg (setq arg 1))
+  (if (< arg 0)
+      (markdown-forward-block (- arg))
+    (dotimes (_ arg)
+      ;; Skip over whitespace in between blocks when moving backward,
+      ;; unless at a block boundary with no whitespace.
+      (skip-syntax-backward "-")
+      (beginning-of-line)
+      ;; Proceed forward based on the type of block.
+      (cond
+       ;; Code blocks
+       ((and (markdown-code-block-at-pos (point)) ;; this line
+             (markdown-code-block-at-pos (line-beginning-position 0))) ;; previous line
+        (forward-line -1)
+        (while (and (markdown-code-block-at-point-p) (not (bobp)))
+          (forward-line -1))
+        (forward-line))
+       ;; Headings
+       ((markdown-heading-at-point)
+        (goto-char (match-beginning 0)))
+       ;; Horizontal rules
+       ((looking-at markdown-regex-hr))
+       ;; Blockquotes
+       ((looking-at markdown-regex-blockquote)
+        (forward-line -1)
+        (while (and (looking-at markdown-regex-blockquote)
+                    (not (bobp)))
+          (forward-line -1))
+        (forward-line))
+       ;; List items
+       ((markdown-cur-list-item-bounds)
+        (markdown-beginning-of-list))
+       ;; Other
+       (t
+        ;; Move forward in case it is a one line regular paragraph.
+        (unless (markdown-next-line-blank-p)
+          (forward-line))
+        (unless (markdown-prev-line-blank-p)
+          (markdown-backward-paragraph)))))))
+
+(defun markdown-forward-block (&optional arg)
+  "Move forward to the next end of a Markdown block.
+Moves across complete code blocks, list items, and blockquotes,
+but otherwise stops at blank lines, headers, and horizontal
+rules.  With argument ARG, do it ARG times; a negative argument
+ARG = -N means move backward N blocks."
+  (interactive "^p")
+  (or arg (setq arg 1))
+  (if (< arg 0)
+      (markdown-backward-block (- arg))
+    (dotimes (_ arg)
+      ;; Skip over whitespace in between blocks when moving forward.
+      (if (markdown-cur-line-blank-p)
+          (skip-syntax-forward "-")
+        (beginning-of-line))
+      ;; Proceed forward based on the type of block.
+      (cond
+       ;; Code blocks
+       ((markdown-code-block-at-point-p)
+        (forward-line)
+        (while (and (markdown-code-block-at-point-p) (not (eobp)))
+          (forward-line)))
+       ;; Headings
+       ((looking-at markdown-regex-header)
+        (goto-char (or (match-end 4) (match-end 2) (match-end 3)))
+        (forward-line))
+       ;; Horizontal rules
+       ((looking-at markdown-regex-hr)
+        (forward-line))
+       ;; Blockquotes
+       ((looking-at markdown-regex-blockquote)
+        (forward-line)
+        (while (and (looking-at markdown-regex-blockquote) (not (eobp)))
+          (forward-line)))
+       ;; List items
+       ((markdown-cur-list-item-bounds)
+        (markdown-end-of-list)
+        (forward-line))
+       ;; Other
+       (t (markdown-forward-paragraph))))
+    (skip-syntax-backward "-")
+    (unless (eobp)
+      (forward-char 1))))
+
+(defun markdown-backward-page (&optional count)
+  "Move backward to boundary of the current toplevel section.
+With COUNT, repeat, or go forward if negative."
+  (interactive "p")
+  (or count (setq count 1))
+  (if (< count 0)
+      (markdown-forward-page (- count))
+    (skip-syntax-backward "-")
+    (or (markdown-back-to-heading-over-code-block t t)
+        (goto-char (point-min)))
+    (when (looking-at markdown-regex-header)
+      (let ((level (markdown-outline-level)))
+        (when (> level 1) (markdown-up-heading level))
+        (when (> count 1)
+          (condition-case nil
+              (markdown-backward-same-level (1- count))
+            (error (goto-char (point-min)))))))))
+
+(defun markdown-forward-page (&optional count)
+  "Move forward to boundary of the current toplevel section.
+With COUNT, repeat, or go backward if negative."
+  (interactive "p")
+  (or count (setq count 1))
+  (if (< count 0)
+      (markdown-backward-page (- count))
+    (if (markdown-back-to-heading-over-code-block t t)
+        (let ((level (markdown-outline-level)))
+          (when (> level 1) (markdown-up-heading level))
+          (condition-case nil
+              (markdown-forward-same-level count)
+            (error (goto-char (point-max)))))
+      (markdown-next-visible-heading 1))))
+
+(defun markdown-next-link ()
+  "Jump to next inline, reference, or wiki link.
+If successful, return point.  Otherwise, return nil.
+See `markdown-wiki-link-p' and `markdown-previous-wiki-link'."
+  (interactive)
+  (let ((opoint (point)))
+    (when (or (markdown-link-p) (markdown-wiki-link-p))
+      ;; At a link already, move past it.
+      (goto-char (+ (match-end 0) 1)))
+    ;; Search for the next wiki link and move to the beginning.
+    (while (and (re-search-forward (markdown-make-regex-link-generic) nil t)
+                (markdown-code-block-at-point-p)
+                (< (point) (point-max))))
+    (if (and (not (eq (point) opoint))
+             (or (markdown-link-p) (markdown-wiki-link-p)))
+        ;; Group 1 will move past non-escape character in wiki link regexp.
+        ;; Go to beginning of group zero for all other link types.
+        (goto-char (or (match-beginning 1) (match-beginning 0)))
+      (goto-char opoint)
+      nil)))
+
+(defun markdown-previous-link ()
+  "Jump to previous wiki link.
+If successful, return point.  Otherwise, return nil.
+See `markdown-wiki-link-p' and `markdown-next-wiki-link'."
+  (interactive)
+  (let ((opoint (point)))
+    (while (and (re-search-backward (markdown-make-regex-link-generic) nil t)
+                (markdown-code-block-at-point-p)
+                (> (point) (point-min))))
+    (if (and (not (eq (point) opoint))
+             (or (markdown-link-p) (markdown-wiki-link-p)))
+        (goto-char (or (match-beginning 1) (match-beginning 0)))
+      (goto-char opoint)
+      nil)))
+
+
+;;; Outline ===================================================================
+
+(defun markdown-move-heading-common (move-fn &optional arg adjust)
+  "Wrapper for `outline-mode' functions to skip false positives.
+MOVE-FN is a function and ARG is its argument. For example,
+headings inside preformatted code blocks may match
+`outline-regexp' but should not be considered as headings.
+When ADJUST is non-nil, adjust the point for interactive calls
+to avoid leaving the point at invisible markup.  This adjustment
+generally should only be done for interactive calls, since other
+functions may expect the point to be at the beginning of the
+regular expression."
+  (let ((prev -1) (start (point)))
+    (if arg (funcall move-fn arg) (funcall move-fn))
+    (while (and (/= prev (point)) (markdown-code-block-at-point-p))
+      (setq prev (point))
+      (if arg (funcall move-fn arg) (funcall move-fn)))
+    ;; Adjust point for setext headings and invisible text.
+    (save-match-data
+      (when (and adjust (thing-at-point-looking-at markdown-regex-header))
+        (if markdown-hide-markup
+            ;; Move to beginning of heading text if markup is hidden.
+            (goto-char (or (match-beginning 1) (match-beginning 5)))
+          ;; Move to beginning of markup otherwise.
+          (goto-char (or (match-beginning 1) (match-beginning 4))))))
+    (if (= (point) start) nil (point))))
+
+(defun markdown-next-visible-heading (arg)
+  "Move to the next visible heading line of any level.
+With argument, repeats or can move backward if negative. ARG is
+passed to `outline-next-visible-heading'."
+  (interactive "p")
+  (markdown-move-heading-common #'outline-next-visible-heading arg 'adjust))
+
+(defun markdown-previous-visible-heading (arg)
+  "Move to the previous visible heading line of any level.
+With argument, repeats or can move backward if negative. ARG is
+passed to `outline-previous-visible-heading'."
+  (interactive "p")
+  (markdown-move-heading-common #'outline-previous-visible-heading arg 'adjust))
+
+(defun markdown-next-heading ()
+  "Move to the next heading line of any level."
+  (markdown-move-heading-common #'outline-next-heading))
+
+(defun markdown-previous-heading ()
+  "Move to the previous heading line of any level."
+  (markdown-move-heading-common #'outline-previous-heading))
+
+(defun markdown-back-to-heading-over-code-block (&optional invisible-ok no-error)
+  "Move back to the beginning of the previous heading.
+Returns t if the point is at a heading, the location if a heading
+was found, and nil otherwise.
+Only visible heading lines are considered, unless INVISIBLE-OK is
+non-nil.  Throw an error if there is no previous heading unless
+NO-ERROR is non-nil.
+Leaves match data intact for `markdown-regex-header'."
+  (beginning-of-line)
+  (or (and (markdown-heading-at-point)
+           (not (markdown-code-block-at-point-p)))
+      (let (found)
+        (save-excursion
+          (while (and (not found)
+                      (re-search-backward markdown-regex-header nil t))
+            (when (and (or invisible-ok (not (outline-invisible-p)))
+                       (not (markdown-code-block-at-point-p)))
+              (setq found (point))))
+          (if (not found)
+              (unless no-error (user-error "Before first heading"))
+            (setq found (point))))
+        (when found (goto-char found)))))
+
+(defun markdown-forward-same-level (arg)
+  "Move forward to the ARG'th heading at same level as this one.
+Stop at the first and last headings of a superior heading."
+  (interactive "p")
+  (markdown-back-to-heading-over-code-block)
+  (markdown-move-heading-common #'outline-forward-same-level arg 'adjust))
+
+(defun markdown-backward-same-level (arg)
+  "Move backward to the ARG'th heading at same level as this one.
+Stop at the first and last headings of a superior heading."
+  (interactive "p")
+  (markdown-back-to-heading-over-code-block)
+  (while (> arg 0)
+    (let ((point-to-move-to
+           (save-excursion
+             (markdown-move-heading-common #'outline-get-last-sibling nil 'adjust))))
+      (if point-to-move-to
+          (progn
+            (goto-char point-to-move-to)
+            (setq arg (1- arg)))
+        (user-error "No previous same-level heading")))))
+
+(defun markdown-up-heading (arg &optional interactive)
+  "Move to the visible heading line of which the present line is a subheading.
+With argument, move up ARG levels.  When called interactively (or
+INTERACTIVE is non-nil), also push the mark."
+  (interactive "p\np")
+  (and interactive (not (eq last-command 'markdown-up-heading))
+       (push-mark))
+  (markdown-move-heading-common #'outline-up-heading arg 'adjust))
+
+(defun markdown-back-to-heading (&optional invisible-ok)
+  "Move to previous heading line, or beg of this line if it's a heading.
+Only visible heading lines are considered, unless INVISIBLE-OK is non-nil."
+  (interactive)
+  (markdown-move-heading-common #'outline-back-to-heading invisible-ok))
+
+(defalias 'markdown-end-of-heading 'outline-end-of-heading)
+
+(defun markdown-on-heading-p ()
+  "Return non-nil if point is on a heading line."
+  (get-text-property (line-beginning-position) 'markdown-heading))
+
+(defun markdown-end-of-subtree (&optional invisible-OK)
+  "Move to the end of the current subtree.
+Only visible heading lines are considered, unless INVISIBLE-OK is
+non-nil.
+Derived from `org-end-of-subtree'."
+  (markdown-back-to-heading invisible-OK)
+  (let ((first t)
+        (level (markdown-outline-level)))
+    (while (and (not (eobp))
+                (or first (> (markdown-outline-level) level)))
+      (setq first nil)
+      (markdown-next-heading))
+    (if (memq (preceding-char) '(?\n ?\^M))
+        (progn
+          ;; Go to end of line before heading
+          (forward-char -1)
+          (if (memq (preceding-char) '(?\n ?\^M))
+              ;; leave blank line before heading
+              (forward-char -1)))))
+  (point))
+
+(defun markdown-outline-fix-visibility ()
+  "Hide any false positive headings that should not be shown.
+For example, headings inside preformatted code blocks may match
+`outline-regexp' but should not be shown as headings when cycling.
+Also, the ending --- line in metadata blocks appears to be a
+setext header, but should not be folded."
+  (save-excursion
+    (goto-char (point-min))
+    ;; Unhide any false positives in metadata blocks
+    (when (markdown-text-property-at-point 'markdown-yaml-metadata-begin)
+      (let ((body (progn (forward-line)
+                         (markdown-text-property-at-point
+                          'markdown-yaml-metadata-section))))
+        (when body
+          (let ((end (progn (goto-char (cl-second body))
+                            (markdown-text-property-at-point
+                             'markdown-yaml-metadata-end))))
+            (outline-flag-region (point-min) (1+ (cl-second end)) nil)))))
+    ;; Hide any false positives in code blocks
+    (unless (outline-on-heading-p)
+      (outline-next-visible-heading 1))
+    (while (< (point) (point-max))
+      (when (markdown-code-block-at-point-p)
+        (outline-flag-region (1- (line-beginning-position)) (line-end-position) t))
+      (outline-next-visible-heading 1))))
+
+(defvar markdown-cycle-global-status 1)
+(defvar markdown-cycle-subtree-status nil)
+
+(defun markdown-next-preface ()
+  (let (finish)
+    (while (and (not finish) (re-search-forward (concat "\n\\(?:" outline-regexp "\\)")
+                                                nil 'move))
+      (unless (markdown-code-block-at-point-p)
+        (goto-char (match-beginning 0))
+        (setq finish t))))
+  (when (and (bolp) (or outline-blank-line (eobp)) (not (bobp)))
+    (forward-char -1)))
+
+(defun markdown-show-entry ()
+  (save-excursion
+    (outline-back-to-heading t)
+    (outline-flag-region (1- (point))
+                         (progn
+                           (markdown-next-preface)
+                           (if (= 1 (- (point-max) (point)))
+                               (point-max)
+                             (point)))
+                         nil)))
+
+;; This function was originally derived from `org-cycle' from org.el.
+(defun markdown-cycle (&optional arg)
+  "Visibility cycling for Markdown mode.
+This function is called with a `\\[universal-argument]' or if ARG is t, perform
+global visibility cycling.  If the point is at an atx-style header, cycle
+visibility of the corresponding subtree.  Otherwise, indent the current line
+ or insert a tab, as appropriate, by calling `indent-for-tab-command'."
+  (interactive "P")
+  (cond
+
+   ;; Global cycling
+   (arg
+    (cond
+     ;; Move from overview to contents
+     ((and (eq last-command this-command)
+           (eq markdown-cycle-global-status 2))
+      (outline-hide-sublevels 1)
+      (message "CONTENTS")
+      (setq markdown-cycle-global-status 3)
+      (markdown-outline-fix-visibility))
+     ;; Move from contents to all
+     ((and (eq last-command this-command)
+           (eq markdown-cycle-global-status 3))
+      (outline-show-all)
+      (message "SHOW ALL")
+      (setq markdown-cycle-global-status 1))
+     ;; Defaults to overview
+     (t
+      (outline-hide-body)
+      (message "OVERVIEW")
+      (setq markdown-cycle-global-status 2)
+      (markdown-outline-fix-visibility))))
+
+   ;; At a heading: rotate between three different views
+   ((save-excursion (beginning-of-line 1) (markdown-on-heading-p))
+    (markdown-back-to-heading)
+    (let ((goal-column 0) eoh eol eos)
+      ;; Determine boundaries
+      (save-excursion
+        (markdown-back-to-heading)
+        (save-excursion
+          (beginning-of-line 2)
+          (while (and (not (eobp)) ;; this is like `next-line'
+                      (get-char-property (1- (point)) 'invisible))
+            (beginning-of-line 2)) (setq eol (point)))
+        (markdown-end-of-heading)   (setq eoh (point))
+        (markdown-end-of-subtree t)
+        (skip-chars-forward " \t\n")
+        (beginning-of-line 1) ; in case this is an item
+        (setq eos (1- (point))))
+      ;; Find out what to do next and set `this-command'
+      (cond
+       ;; Nothing is hidden behind this heading
+       ((= eos eoh)
+        (message "EMPTY ENTRY")
+        (setq markdown-cycle-subtree-status nil))
+       ;; Entire subtree is hidden in one line: open it
+       ((>= eol eos)
+        (markdown-show-entry)
+        (outline-show-children)
+        (message "CHILDREN")
+        (setq markdown-cycle-subtree-status 'children))
+       ;; We just showed the children, now show everything.
+       ((and (eq last-command this-command)
+             (eq markdown-cycle-subtree-status 'children))
+        (outline-show-subtree)
+        (message "SUBTREE")
+        (setq markdown-cycle-subtree-status 'subtree))
+       ;; Default action: hide the subtree.
+       (t
+        (outline-hide-subtree)
+        (message "FOLDED")
+        (setq markdown-cycle-subtree-status 'folded)))))
+
+   ;; In a table, move forward by one cell
+   ((markdown-table-at-point-p)
+    (call-interactively #'markdown-table-forward-cell))
+
+   ;; Otherwise, indent as appropriate
+   (t
+    (indent-for-tab-command))))
+
+(defun markdown-shifttab ()
+  "Handle S-TAB keybinding based on context.
+When in a table, move backward one cell.
+Otherwise, cycle global heading visibility by calling
+`markdown-cycle' with argument t."
+  (interactive)
+  (cond ((markdown-table-at-point-p)
+         (call-interactively #'markdown-table-backward-cell))
+        (t (markdown-cycle t))))
+
+(defun markdown-outline-level ()
+  "Return the depth to which a statement is nested in the outline."
+  (cond
+   ((and (match-beginning 0)
+         (markdown-code-block-at-pos (match-beginning 0)))
+    7) ;; Only 6 header levels are defined.
+   ((match-end 2) 1)
+   ((match-end 3) 2)
+   ((match-end 4)
+    (length (markdown-trim-whitespace (match-string-no-properties 4))))))
+
+(defun markdown-promote-subtree (&optional arg)
+  "Promote the current subtree of ATX headings.
+Note that Markdown does not support heading levels higher than
+six and therefore level-six headings will not be promoted
+further. If ARG is non-nil promote the heading, otherwise
+demote."
+  (interactive "*P")
+  (save-excursion
+    (when (and (or (thing-at-point-looking-at markdown-regex-header-atx)
+                   (re-search-backward markdown-regex-header-atx nil t))
+               (not (markdown-code-block-at-point-p)))
+      (let ((level (length (match-string 1)))
+            (promote-or-demote (if arg 1 -1))
+            (remove 't))
+        (markdown-cycle-atx promote-or-demote remove)
+        (catch 'end-of-subtree
+          (while (and (markdown-next-heading)
+                      (looking-at markdown-regex-header-atx))
+            ;; Exit if this not a higher level heading; promote otherwise.
+            (if (and (looking-at markdown-regex-header-atx)
+                     (<= (length (match-string-no-properties 1)) level))
+                (throw 'end-of-subtree nil)
+              (markdown-cycle-atx promote-or-demote remove))))))))
+
+(defun markdown-demote-subtree ()
+  "Demote the current subtree of ATX headings."
+  (interactive)
+  (markdown-promote-subtree t))
+
+(defun markdown-move-subtree-up ()
+  "Move the current subtree of ATX headings up."
+  (interactive)
+  (outline-move-subtree-up 1))
+
+(defun markdown-move-subtree-down ()
+  "Move the current subtree of ATX headings down."
+  (interactive)
+  (outline-move-subtree-down 1))
+
+(defun markdown-outline-next ()
+  "Move to next list item, when in a list, or next visible heading."
+  (interactive)
+  (let ((bounds (markdown-next-list-item-bounds)))
+    (if bounds
+        (goto-char (nth 0 bounds))
+      (markdown-next-visible-heading 1))))
+
+(defun markdown-outline-previous ()
+  "Move to previous list item, when in a list, or previous visible heading."
+  (interactive)
+  (let ((bounds (markdown-prev-list-item-bounds)))
+    (if bounds
+        (goto-char (nth 0 bounds))
+      (markdown-previous-visible-heading 1))))
+
+(defun markdown-outline-next-same-level ()
+  "Move to next list item or heading of same level."
+  (interactive)
+  (let ((bounds (markdown-cur-list-item-bounds)))
+    (if bounds
+        (markdown-next-list-item (nth 3 bounds))
+      (markdown-forward-same-level 1))))
+
+(defun markdown-outline-previous-same-level ()
+  "Move to previous list item or heading of same level."
+  (interactive)
+  (let ((bounds (markdown-cur-list-item-bounds)))
+    (if bounds
+        (markdown-prev-list-item (nth 3 bounds))
+      (markdown-backward-same-level 1))))
+
+(defun markdown-outline-up ()
+  "Move to previous list item, when in a list, or previous heading."
+  (interactive)
+  (unless (markdown-up-list)
+    (markdown-up-heading 1)))
+
+
+;;; Marking and Narrowing =====================================================
+
+(defun markdown-mark-paragraph ()
+  "Put mark at end of this block, point at beginning.
+The block marked is the one that contains point or follows point.
+
+Interactively, if this command is repeated or (in Transient Mark
+mode) if the mark is active, it marks the next block after the
+ones already marked."
+  (interactive)
+  (if (or (and (eq last-command this-command) (mark t))
+          (and transient-mark-mode mark-active))
+      (set-mark
+       (save-excursion
+         (goto-char (mark))
+         (markdown-forward-paragraph)
+         (point)))
+    (let ((beginning-of-defun-function #'markdown-backward-paragraph)
+          (end-of-defun-function #'markdown-forward-paragraph))
+      (mark-defun))))
+
+(defun markdown-mark-block ()
+  "Put mark at end of this block, point at beginning.
+The block marked is the one that contains point or follows point.
+
+Interactively, if this command is repeated or (in Transient Mark
+mode) if the mark is active, it marks the next block after the
+ones already marked."
+  (interactive)
+  (if (or (and (eq last-command this-command) (mark t))
+          (and transient-mark-mode mark-active))
+      (set-mark
+       (save-excursion
+         (goto-char (mark))
+         (markdown-forward-block)
+         (point)))
+    (let ((beginning-of-defun-function #'markdown-backward-block)
+          (end-of-defun-function #'markdown-forward-block))
+      (mark-defun))))
+
+(defun markdown-narrow-to-block ()
+  "Make text outside current block invisible.
+The current block is the one that contains point or follows point."
+  (interactive)
+  (let ((beginning-of-defun-function #'markdown-backward-block)
+        (end-of-defun-function #'markdown-forward-block))
+    (narrow-to-defun)))
+
+(defun markdown-mark-text-block ()
+  "Put mark at end of this plain text block, point at beginning.
+The block marked is the one that contains point or follows point.
+
+Interactively, if this command is repeated or (in Transient Mark
+mode) if the mark is active, it marks the next block after the
+ones already marked."
+  (interactive)
+  (if (or (and (eq last-command this-command) (mark t))
+          (and transient-mark-mode mark-active))
+      (set-mark
+       (save-excursion
+         (goto-char (mark))
+         (markdown-end-of-text-block)
+         (point)))
+    (let ((beginning-of-defun-function #'markdown-beginning-of-text-block)
+          (end-of-defun-function #'markdown-end-of-text-block))
+      (mark-defun))))
+
+(defun markdown-mark-page ()
+  "Put mark at end of this top level section, point at beginning.
+The top level section marked is the one that contains point or
+follows point.
+
+Interactively, if this command is repeated or (in Transient Mark
+mode) if the mark is active, it marks the next page after the
+ones already marked."
+  (interactive)
+  (if (or (and (eq last-command this-command) (mark t))
+          (and transient-mark-mode mark-active))
+      (set-mark
+       (save-excursion
+         (goto-char (mark))
+         (markdown-forward-page)
+         (point)))
+    (let ((beginning-of-defun-function #'markdown-backward-page)
+          (end-of-defun-function #'markdown-forward-page))
+      (mark-defun))))
+
+(defun markdown-narrow-to-page ()
+  "Make text outside current top level section invisible.
+The current section is the one that contains point or follows point."
+  (interactive)
+  (let ((beginning-of-defun-function #'markdown-backward-page)
+        (end-of-defun-function #'markdown-forward-page))
+    (narrow-to-defun)))
+
+(defun markdown-mark-subtree ()
+  "Mark the current subtree.
+This puts point at the start of the current subtree, and mark at the end."
+  (interactive)
+  (let ((beg))
+    (if (markdown-heading-at-point)
+        (beginning-of-line)
+      (markdown-previous-visible-heading 1))
+    (setq beg (point))
+    (markdown-end-of-subtree)
+    (push-mark (point) nil t)
+    (goto-char beg)))
+
+(defun markdown-narrow-to-subtree ()
+  "Narrow buffer to the current subtree."
+  (interactive)
+  (save-excursion
+    (save-match-data
+      (narrow-to-region
+       (progn (markdown-back-to-heading-over-code-block t) (point))
+       (progn (markdown-end-of-subtree)
+              (if (and (markdown-heading-at-point) (not (eobp)))
+                  (backward-char 1))
+              (point))))))
+
+
+;;; Generic Structure Editing, Completion, and Cycling Commands ===============
+
+(defun markdown-move-up ()
+  "Move thing at point up.
+When in a list item, call `markdown-move-list-item-up'.
+When in a table, call `markdown-table-move-row-up'.
+Otherwise, move the current heading subtree up with
+`markdown-move-subtree-up'."
+  (interactive)
+  (cond
+   ((markdown-list-item-at-point-p)
+    (call-interactively #'markdown-move-list-item-up))
+   ((markdown-table-at-point-p)
+    (call-interactively #'markdown-table-move-row-up))
+   (t
+    (call-interactively #'markdown-move-subtree-up))))
+
+(defun markdown-move-down ()
+  "Move thing at point down.
+When in a list item, call `markdown-move-list-item-down'.
+Otherwise, move the current heading subtree up with
+`markdown-move-subtree-down'."
+  (interactive)
+  (cond
+   ((markdown-list-item-at-point-p)
+    (call-interactively #'markdown-move-list-item-down))
+   ((markdown-table-at-point-p)
+    (call-interactively #'markdown-table-move-row-down))
+   (t
+    (call-interactively #'markdown-move-subtree-down))))
+
+(defun markdown-promote ()
+  "Promote or move element at point to the left.
+Depending on the context, this function will promote a heading or
+list item at the point, move a table column to the left, or cycle
+markup."
+  (interactive)
+  (let (bounds)
+    (cond
+     ;; Promote atx heading subtree
+     ((thing-at-point-looking-at markdown-regex-header-atx)
+      (markdown-promote-subtree))
+     ;; Promote setext heading
+     ((thing-at-point-looking-at markdown-regex-header-setext)
+      (markdown-cycle-setext -1))
+     ;; Promote horizontal rule
+     ((thing-at-point-looking-at markdown-regex-hr)
+      (markdown-cycle-hr -1))
+     ;; Promote list item
+     ((setq bounds (markdown-cur-list-item-bounds))
+      (markdown-promote-list-item bounds))
+     ;; Move table column to the left
+     ((markdown-table-at-point-p)
+      (call-interactively #'markdown-table-move-column-left))
+     ;; Promote bold
+     ((thing-at-point-looking-at markdown-regex-bold)
+      (markdown-cycle-bold))
+     ;; Promote italic
+     ((thing-at-point-looking-at markdown-regex-italic)
+      (markdown-cycle-italic))
+     (t
+      (user-error "Nothing to promote at point")))))
+
+(defun markdown-demote ()
+  "Demote or move element at point to the right.
+Depending on the context, this function will demote a heading or
+list item at the point, move a table column to the right, or cycle
+or remove markup."
+  (interactive)
+  (let (bounds)
+    (cond
+     ;; Demote atx heading subtree
+     ((thing-at-point-looking-at markdown-regex-header-atx)
+      (markdown-demote-subtree))
+     ;; Demote setext heading
+     ((thing-at-point-looking-at markdown-regex-header-setext)
+      (markdown-cycle-setext 1))
+     ;; Demote horizontal rule
+     ((thing-at-point-looking-at markdown-regex-hr)
+      (markdown-cycle-hr 1))
+     ;; Demote list item
+     ((setq bounds (markdown-cur-list-item-bounds))
+      (markdown-demote-list-item bounds))
+     ;; Move table column to the right
+     ((markdown-table-at-point-p)
+      (call-interactively #'markdown-table-move-column-right))
+     ;; Demote bold
+     ((thing-at-point-looking-at markdown-regex-bold)
+      (markdown-cycle-bold))
+     ;; Demote italic
+     ((thing-at-point-looking-at markdown-regex-italic)
+      (markdown-cycle-italic))
+     (t
+      (user-error "Nothing to demote at point")))))
+
+
+;;; Commands ==================================================================
+
+(defun markdown (&optional output-buffer-name)
+  "Run `markdown-command' on buffer, sending output to OUTPUT-BUFFER-NAME.
+The output buffer name defaults to `markdown-output-buffer-name'.
+Return the name of the output buffer used."
+  (interactive)
+  (save-window-excursion
+    (let* ((commands (cond ((stringp markdown-command) (split-string markdown-command))
+                           ((listp markdown-command) markdown-command)))
+           (command (car-safe commands))
+           (command-args (cdr-safe commands))
+           begin-region end-region)
+      (if (use-region-p)
+          (setq begin-region (region-beginning)
+                end-region (region-end))
+        (setq begin-region (point-min)
+              end-region (point-max)))
+
+      (unless output-buffer-name
+        (setq output-buffer-name markdown-output-buffer-name))
+      (when (and (stringp command) (not (executable-find command)))
+        (user-error "Markdown command %s is not found" command))
+      (let ((exit-code
+             (cond
+              ;; Handle case when `markdown-command' does not read from stdin
+              ((and (stringp command) markdown-command-needs-filename)
+               (if (not buffer-file-name)
+                   (user-error "Must be visiting a file")
+                 ;; Don’t use ‘shell-command’ because it’s not guaranteed to
+                 ;; return the exit code of the process.
+                 (let ((command (if (listp markdown-command)
+                                    (string-join markdown-command " ")
+                                  markdown-command)))
+                   (shell-command-on-region
+                    ;; Pass an empty region so that stdin is empty.
+                    (point) (point)
+                    (concat command " "
+                            (shell-quote-argument buffer-file-name))
+                    output-buffer-name))))
+              ;; Pass region to `markdown-command' via stdin
+              (t
+               (let ((buf (get-buffer-create output-buffer-name)))
+                 (with-current-buffer buf
+                   (setq buffer-read-only nil)
+                   (erase-buffer))
+                 (if (stringp command)
+                     (if (not (null command-args))
+                         (apply #'call-process-region begin-region end-region command nil buf nil command-args)
+                       (call-process-region begin-region end-region command nil buf))
+                   (if markdown-command-needs-filename
+                       (if (not buffer-file-name)
+                           (user-error "Must be visiting a file")
+                         (funcall markdown-command begin-region end-region buf buffer-file-name))
+                     (funcall markdown-command begin-region end-region buf))
+                   ;; If the ‘markdown-command’ function didn’t signal an
+                   ;; error, assume it succeeded by binding ‘exit-code’ to 0.
+                   0))))))
+        ;; The exit code can be a signal description string, so don’t use ‘=’
+        ;; or ‘zerop’.
+        (unless (eq exit-code 0)
+          (user-error "%s failed with exit code %s"
+                      markdown-command exit-code))))
+    output-buffer-name))
+
+(defun markdown-standalone (&optional output-buffer-name)
+  "Special function to provide standalone HTML output.
+Insert the output in the buffer named OUTPUT-BUFFER-NAME."
+  (interactive)
+  (setq output-buffer-name (markdown output-buffer-name))
+  (with-current-buffer output-buffer-name
+    (set-buffer output-buffer-name)
+    (unless (markdown-output-standalone-p)
+      (markdown-add-xhtml-header-and-footer output-buffer-name))
+    (goto-char (point-min))
+    (html-mode))
+  output-buffer-name)
+
+(defun markdown-other-window (&optional output-buffer-name)
+  "Run `markdown-command' on current buffer and display in other window.
+When OUTPUT-BUFFER-NAME is given, insert the output in the buffer with
+that name."
+  (interactive)
+  (markdown-display-buffer-other-window
+   (markdown-standalone output-buffer-name)))
+
+(defun markdown-output-standalone-p ()
+  "Determine whether `markdown-command' output is standalone XHTML.
+Standalone XHTML output is identified by an occurrence of
+`markdown-xhtml-standalone-regexp' in the first five lines of output."
+  (save-excursion
+    (goto-char (point-min))
+    (save-match-data
+      (re-search-forward
+       markdown-xhtml-standalone-regexp
+       (save-excursion (goto-char (point-min)) (forward-line 4) (point))
+       t))))
+
+(defun markdown-stylesheet-link-string (stylesheet-path)
+  (concat "<link rel=\"stylesheet\" type=\"text/css\" media=\"all\" href=\""
+          (or (and (string-prefix-p "~" stylesheet-path)
+                   (expand-file-name stylesheet-path))
+              stylesheet-path)
+          "\"  />"))
+
+(defun markdown-add-xhtml-header-and-footer (title)
+  "Wrap XHTML header and footer with given TITLE around current buffer."
+  (goto-char (point-min))
+  (insert "<?xml version=\"1.0\" encoding=\"UTF-8\" ?>\n"
+          "<!DOCTYPE html PUBLIC \"-//W3C//DTD XHTML 1.0 Strict//EN\"\n"
+          "\t\"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd\">\n\n"
+          "<html xmlns=\"http://www.w3.org/1999/xhtml\">\n\n"
+          "<head>\n<title>")
+  (insert title)
+  (insert "</title>\n")
+  (unless (= (length markdown-content-type) 0)
+    (insert
+     (format
+      "<meta http-equiv=\"Content-Type\" content=\"%s;charset=%s\"/>\n"
+      markdown-content-type
+      (or (and markdown-coding-system
+               (coding-system-get markdown-coding-system
+                                  'mime-charset))
+          (coding-system-get buffer-file-coding-system
+                             'mime-charset)
+          "utf-8"))))
+  (if (> (length markdown-css-paths) 0)
+      (insert (mapconcat #'markdown-stylesheet-link-string
+                         markdown-css-paths "\n")))
+  (when (> (length markdown-xhtml-header-content) 0)
+    (insert markdown-xhtml-header-content))
+  (insert "\n</head>\n\n"
+          "<body>\n\n")
+  (when (> (length markdown-xhtml-body-preamble) 0)
+    (insert markdown-xhtml-body-preamble "\n"))
+  (goto-char (point-max))
+  (when (> (length markdown-xhtml-body-epilogue) 0)
+    (insert "\n" markdown-xhtml-body-epilogue))
+  (insert "\n"
+          "</body>\n"
+          "</html>\n"))
+
+(defun markdown-preview (&optional output-buffer-name)
+  "Run `markdown-command' on the current buffer and view output in browser.
+When OUTPUT-BUFFER-NAME is given, insert the output in the buffer with
+that name."
+  (interactive)
+  (browse-url-of-buffer
+   (markdown-standalone (or output-buffer-name markdown-output-buffer-name))))
+
+(defun markdown-export-file-name (&optional extension)
+  "Attempt to generate a filename for Markdown output.
+The file extension will be EXTENSION if given, or .html by default.
+If the current buffer is visiting a file, we construct a new
+output filename based on that filename.  Otherwise, return nil."
+  (when (buffer-file-name)
+    (unless extension
+      (setq extension ".html"))
+    (let ((candidate
+           (concat
+            (cond
+             ((buffer-file-name)
+              (file-name-sans-extension (buffer-file-name)))
+             (t (buffer-name)))
+            extension)))
+      (cond
+       ((equal candidate (buffer-file-name))
+        (concat candidate extension))
+       (t
+        candidate)))))
+
+(defun markdown-export (&optional output-file)
+  "Run Markdown on the current buffer, save to file, and return the filename.
+If OUTPUT-FILE is given, use that as the filename.  Otherwise, use the filename
+generated by `markdown-export-file-name', which will be constructed using the
+current filename, but with the extension removed and replaced with .html."
+  (interactive)
+  (unless output-file
+    (setq output-file (markdown-export-file-name ".html")))
+  (when output-file
+    (let* ((init-buf (current-buffer))
+           (init-point (point))
+           (init-buf-string (buffer-string))
+           (output-buffer (find-file-noselect output-file))
+           (output-buffer-name (buffer-name output-buffer)))
+      (run-hooks 'markdown-before-export-hook)
+      (markdown-standalone output-buffer-name)
+      (with-current-buffer output-buffer
+        (run-hooks 'markdown-after-export-hook)
+        (save-buffer)
+        (when markdown-export-kill-buffer (kill-buffer)))
+      ;; if modified, restore initial buffer
+      (when (buffer-modified-p init-buf)
+        (erase-buffer)
+        (insert init-buf-string)
+        (save-buffer)
+        (goto-char init-point))
+      output-file)))
+
+(defun markdown-export-and-preview ()
+  "Export to XHTML using `markdown-export' and browse the resulting file."
+  (interactive)
+  (browse-url-of-file (markdown-export)))
+
+(defvar-local markdown-live-preview-buffer nil
+  "Buffer used to preview markdown output in `markdown-live-preview-export'.")
+
+(defvar-local markdown-live-preview-source-buffer nil
+  "Source buffer from which current buffer was generated.
+This is the inverse of `markdown-live-preview-buffer'.")
+
+(defvar markdown-live-preview-currently-exporting nil)
+
+(defun markdown-live-preview-get-filename ()
+  "Standardize the filename exported by `markdown-live-preview-export'."
+  (markdown-export-file-name ".html"))
+
+(defun markdown-live-preview-window-eww (file)
+  "Preview FILE with eww.
+To be used with `markdown-live-preview-window-function'."
+  (eww-open-file file)
+  (get-buffer "*eww*"))
+
+(defun markdown-visual-lines-between-points (beg end)
+  (save-excursion
+    (goto-char beg)
+    (cl-loop with count = 0
+             while (progn (end-of-visual-line)
+                          (and (< (point) end) (line-move-visual 1 t)))
+             do (cl-incf count)
+             finally return count)))
+
+(defun markdown-live-preview-window-serialize (buf)
+  "Get window point and scroll data for all windows displaying BUF."
+  (when (buffer-live-p buf)
+    (with-current-buffer buf
+      (mapcar
+       (lambda (win)
+         (with-selected-window win
+           (let* ((start (window-start))
+                  (pt (window-point))
+                  (pt-or-sym (cond ((= pt (point-min)) 'min)
+                                   ((= pt (point-max)) 'max)
+                                   (t pt)))
+                  (diff (markdown-visual-lines-between-points
+                         start pt)))
+             (list win pt-or-sym diff))))
+       (get-buffer-window-list buf)))))
+
+(defun markdown-get-point-back-lines (pt num-lines)
+  (save-excursion
+    (goto-char pt)
+    (line-move-visual (- num-lines) t)
+    ;; in testing, can occasionally overshoot the number of lines to traverse
+    (let ((actual-num-lines (markdown-visual-lines-between-points (point) pt)))
+      (when (> actual-num-lines num-lines)
+        (line-move-visual (- actual-num-lines num-lines) t)))
+    (point)))
+
+(defun markdown-live-preview-window-deserialize (window-posns)
+  "Apply window point and scroll data from WINDOW-POSNS.
+WINDOW-POSNS is provided by `markdown-live-preview-window-serialize'."
+  (cl-destructuring-bind (win pt-or-sym diff) window-posns
+    (when (window-live-p win)
+      (with-current-buffer markdown-live-preview-buffer
+        (set-window-buffer win (current-buffer))
+        (cl-destructuring-bind (actual-pt actual-diff)
+            (cl-case pt-or-sym
+              (min (list (point-min) 0))
+              (max (list (point-max) diff))
+              (t   (list pt-or-sym diff)))
+          (set-window-start
+           win (markdown-get-point-back-lines actual-pt actual-diff))
+          (set-window-point win actual-pt))))))
+
+(defun markdown-live-preview-export ()
+  "Export to XHTML using `markdown-export'.
+Browse the resulting file within Emacs using
+`markdown-live-preview-window-function' Return the buffer
+displaying the rendered output."
+  (interactive)
+  (let ((filename (markdown-live-preview-get-filename)))
+    (when filename
+      (let* ((markdown-live-preview-currently-exporting t)
+             (cur-buf (current-buffer))
+             (export-file (markdown-export filename))
+             ;; get positions in all windows currently displaying output buffer
+             (window-data
+              (markdown-live-preview-window-serialize
+               markdown-live-preview-buffer)))
+        (save-window-excursion
+          (let ((output-buffer
+                 (funcall markdown-live-preview-window-function export-file)))
+            (with-current-buffer output-buffer
+              (setq markdown-live-preview-source-buffer cur-buf)
+              (add-hook 'kill-buffer-hook
+                        #'markdown-live-preview-remove-on-kill t t))
+            (with-current-buffer cur-buf
+              (setq markdown-live-preview-buffer output-buffer))))
+        (with-current-buffer cur-buf
+          ;; reset all windows displaying output buffer to where they were,
+          ;; now with the new output
+          (mapc #'markdown-live-preview-window-deserialize window-data)
+          ;; delete html editing buffer
+          (let ((buf (get-file-buffer export-file))) (when buf (kill-buffer buf)))
+          (when (and export-file (file-exists-p export-file)
+                     (eq markdown-live-preview-delete-export
+                         'delete-on-export))
+            (delete-file export-file))
+          markdown-live-preview-buffer)))))
+
+(defun markdown-live-preview-remove ()
+  (when (buffer-live-p markdown-live-preview-buffer)
+    (kill-buffer markdown-live-preview-buffer))
+  (setq markdown-live-preview-buffer nil)
+  ;; if set to 'delete-on-export, the output has already been deleted
+  (when (eq markdown-live-preview-delete-export 'delete-on-destroy)
+    (let ((outfile-name (markdown-live-preview-get-filename)))
+      (when (and outfile-name (file-exists-p outfile-name))
+        (delete-file outfile-name)))))
+
+(defun markdown-get-other-window ()
+  "Find another window to display preview or output content."
+  (cond
+   ((memq markdown-split-window-direction '(vertical below))
+    (or (window-in-direction 'below) (split-window-vertically)))
+   ((memq markdown-split-window-direction '(horizontal right))
+    (or (window-in-direction 'right) (split-window-horizontally)))
+   (t (split-window-sensibly (get-buffer-window)))))
+
+(defun markdown-display-buffer-other-window (buf)
+  "Display preview or output buffer BUF in another window."
+  (if (and display-buffer-alist (eq markdown-split-window-direction 'any))
+      (display-buffer buf)
+    (let ((cur-buf (current-buffer))
+          (window (markdown-get-other-window)))
+      (set-window-buffer window buf)
+      (set-buffer cur-buf))))
+
+(defun markdown-live-preview-if-markdown ()
+  (when (and (derived-mode-p 'markdown-mode)
+             markdown-live-preview-mode)
+    (unless markdown-live-preview-currently-exporting
+      (if (buffer-live-p markdown-live-preview-buffer)
+          (markdown-live-preview-export)
+        (markdown-display-buffer-other-window
+         (markdown-live-preview-export))))))
+
+(defun markdown-live-preview-remove-on-kill ()
+  (cond ((and (derived-mode-p 'markdown-mode)
+              markdown-live-preview-mode)
+         (markdown-live-preview-remove))
+        (markdown-live-preview-source-buffer
+         (with-current-buffer markdown-live-preview-source-buffer
+           (setq markdown-live-preview-buffer nil))
+         (setq markdown-live-preview-source-buffer nil))))
+
+(defun markdown-live-preview-switch-to-output ()
+  "Turn on `markdown-live-preview-mode' and switch to output buffer.
+The output buffer is opened in another window."
+  (interactive)
+  (if markdown-live-preview-mode
+      (markdown-display-buffer-other-window (markdown-live-preview-export)))
+  (markdown-live-preview-mode))
+
+(defun markdown-live-preview-re-export ()
+  "Re-export the current live previewed content.
+If the current buffer is a buffer displaying the exported version of a
+`markdown-live-preview-mode' buffer, call `markdown-live-preview-export' and
+update this buffer's contents."
+  (interactive)
+  (when markdown-live-preview-source-buffer
+    (with-current-buffer markdown-live-preview-source-buffer
+      (markdown-live-preview-export))))
+
+(defun markdown-open ()
+  "Open file for the current buffer with `markdown-open-command'."
+  (interactive)
+  (unless markdown-open-command
+    (user-error "Variable `markdown-open-command' must be set"))
+  (if (stringp markdown-open-command)
+      (if (not buffer-file-name)
+          (user-error "Must be visiting a file")
+        (save-buffer)
+        (let ((exit-code (call-process markdown-open-command nil nil nil
+                                       buffer-file-name)))
+          ;; The exit code can be a signal description string, so don’t use ‘=’
+          ;; or ‘zerop’.
+          (unless (eq exit-code 0)
+            (user-error "%s failed with exit code %s"
+                        markdown-open-command exit-code))))
+    (funcall markdown-open-command))
+  nil)
+
+(defun markdown-kill-ring-save ()
+  "Run Markdown on file and store output in the kill ring."
+  (interactive)
+  (save-window-excursion
+    (markdown)
+    (with-current-buffer markdown-output-buffer-name
+      (kill-ring-save (point-min) (point-max)))))
+
+
+;;; Links =====================================================================
+
+(defun markdown-backward-to-link-start ()
+  "Backward link start position if current position is in link title."
+  ;; Issue #305
+  (when (eq (get-text-property (point) 'face) 'markdown-link-face)
+    (skip-chars-backward "^[")
+    (forward-char -1)))
+
+(defun markdown-link-p ()
+  "Return non-nil when `point' is at a non-wiki link.
+See `markdown-wiki-link-p' for more information."
+  (save-excursion
+    (let ((case-fold-search nil))
+      (when (and (not (markdown-wiki-link-p)) (not (markdown-code-block-at-point-p)))
+        (markdown-backward-to-link-start)
+        (or (thing-at-point-looking-at markdown-regex-link-inline)
+            (thing-at-point-looking-at markdown-regex-link-reference)
+            (thing-at-point-looking-at markdown-regex-uri)
+            (thing-at-point-looking-at markdown-regex-angle-uri))))))
+
+(defun markdown-link-at-pos (pos)
+  "Return properties of link or image at position POS.
+Value is a list of elements describing the link:
+ 0. beginning position
+ 1. end position
+ 2. link text
+ 3. URL
+ 4. reference label
+ 5. title text
+ 6. bang (nil or \"!\")"
+  (save-excursion
+    (goto-char pos)
+    (markdown-backward-to-link-start)
+    (let (begin end text url reference title bang)
+      (cond
+       ;; Inline image or link at point.
+       ((thing-at-point-looking-at markdown-regex-link-inline)
+        (setq bang (match-string-no-properties 1)
+              begin (match-beginning 0)
+              end (match-end 0)
+              text (match-string-no-properties 3)
+              url (match-string-no-properties 6))
+        (if (match-end 7)
+            (setq title (substring (match-string-no-properties 7) 1 -1))
+          ;; #408 URL contains close parenthesis case
+          (goto-char (match-beginning 5))
+          (let ((paren-end (scan-sexps (point) 1)))
+            (when (and paren-end (< end paren-end))
+              (setq url (buffer-substring (match-beginning 6) (1- paren-end)))))))
+       ;; Reference link at point.
+       ((or (thing-at-point-looking-at markdown-regex-link-inline)
+            (thing-at-point-looking-at markdown-regex-link-reference))
+        (setq bang (match-string-no-properties 1)
+              begin (match-beginning 0)
+              end (match-end 0)
+              text (match-string-no-properties 3))
+        (when (char-equal (char-after (match-beginning 5)) ?\[)
+          (setq reference (match-string-no-properties 6))))
+       ;; Angle bracket URI at point.
+       ((thing-at-point-looking-at markdown-regex-angle-uri)
+        (setq begin (match-beginning 0)
+              end (match-end 0)
+              url (match-string-no-properties 2)))
+       ;; Plain URI at point.
+       ((thing-at-point-looking-at markdown-regex-uri)
+        (setq begin (match-beginning 0)
+              end (match-end 0)
+              url (match-string-no-properties 1))))
+      (list begin end text url reference title bang))))
+
+(defun markdown-link-url ()
+  "Return the URL part of the regular (non-wiki) link at point.
+Works with both inline and reference style links, and with images.
+If point is not at a link or the link reference is not defined
+returns nil."
+  (let* ((values (markdown-link-at-pos (point)))
+         (text (nth 2 values))
+         (url (nth 3 values))
+         (ref (nth 4 values)))
+    (or url (and ref (car (markdown-reference-definition
+                           (downcase (if (string= ref "") text ref))))))))
+
+(defun markdown--browse-url (url)
+  (let* ((struct (url-generic-parse-url url))
+         (full (url-fullness struct))
+         (file url))
+    ;; Parse URL, determine fullness, strip query string
+    (setq file (car (url-path-and-query struct)))
+    ;; Open full URLs in browser, files in Emacs
+    (if full
+        (browse-url url)
+      (when (and file (> (length file) 0))
+        (let ((link-file (funcall markdown-translate-filename-function file)))
+          (if (and markdown-open-image-command (string-match-p (image-file-name-regexp) link-file))
+              (if (functionp markdown-open-image-command)
+                  (funcall markdown-open-image-command link-file)
+                (process-file markdown-open-image-command nil nil nil link-file))
+            (find-file link-file)))))))
+
+(defun markdown-follow-link-at-point (&optional event)
+  "Open the non-wiki link at point or EVENT.
+If the link is a complete URL, open in browser with `browse-url'.
+Otherwise, open with `find-file' after stripping anchor and/or query string.
+Translate filenames using `markdown-filename-translate-function'."
+  (interactive (list last-command-event))
+  (save-excursion
+    (if event (posn-set-point (event-start event)))
+    (if (markdown-link-p)
+        (markdown--browse-url (markdown-link-url))
+      (user-error "Point is not at a Markdown link or URL"))))
+
+(defun markdown-fontify-inline-links (last)
+  "Add text properties to next inline link from point to LAST."
+  (when (markdown-match-generic-links last nil)
+    (let* ((link-start (match-beginning 3))
+           (link-end (match-end 3))
+           (url-start (match-beginning 6))
+           (url-end (match-end 6))
+           (url (match-string-no-properties 6))
+           (title-start (match-beginning 7))
+           (title-end (match-end 7))
+           (title (match-string-no-properties 7))
+           ;; Markup part
+           (mp (list 'invisible 'markdown-markup
+                     'rear-nonsticky t
+                     'font-lock-multiline t))
+           ;; Link part (without face)
+           (lp (list 'keymap markdown-mode-mouse-map
+                     'mouse-face 'markdown-highlight-face
+                     'font-lock-multiline t
+                     'help-echo (if title (concat title "\n" url) url)))
+           ;; URL part
+           (up (list 'keymap markdown-mode-mouse-map
+                     'invisible 'markdown-markup
+                     'mouse-face 'markdown-highlight-face
+                     'font-lock-multiline t))
+           ;; URL composition character
+           (url-char (markdown--first-displayable markdown-url-compose-char))
+           ;; Title part
+           (tp (list 'invisible 'markdown-markup
+                     'font-lock-multiline t)))
+      (dolist (g '(1 2 4 5 8))
+        (when (match-end g)
+          (add-text-properties (match-beginning g) (match-end g) mp)
+          (add-face-text-property (match-beginning g) (match-end g) 'markdown-markup-face)))
+      ;; Preserve existing faces applied to link part (e.g., inline code)
+      (when link-start
+        (add-text-properties link-start link-end lp)
+        (add-face-text-property link-start link-end 'markdown-link-face))
+      (when url-start
+        (add-text-properties url-start url-end up)
+        (add-face-text-property url-start url-end 'markdown-url-face))
+      (when title-start
+        (add-text-properties url-end title-end tp)
+        (add-face-text-property url-end title-end 'markdown-link-title-face))
+      (when (and markdown-hide-urls url-start)
+        (compose-region url-start (or title-end url-end) url-char))
+      t)))
+
+(defun markdown-fontify-reference-links (last)
+  "Add text properties to next reference link from point to LAST."
+  (when (markdown-match-generic-links last t)
+    (let* ((link-start (match-beginning 3))
+           (link-end (match-end 3))
+           (ref-start (match-beginning 6))
+           (ref-end (match-end 6))
+           ;; Markup part
+           (mp (list 'invisible 'markdown-markup
+                     'rear-nonsticky t
+                     'font-lock-multiline t))
+           ;; Link part
+           (lp (list 'keymap markdown-mode-mouse-map
+                     'mouse-face 'markdown-highlight-face
+                     'font-lock-multiline t
+                     'help-echo (lambda (_ __ pos)
+                                  (save-match-data
+                                    (save-excursion
+                                      (goto-char pos)
+                                      (or (markdown-link-url)
+                                          "Undefined reference"))))))
+           ;; URL composition character
+           (url-char (markdown--first-displayable markdown-url-compose-char))
+           ;; Reference part
+           (rp (list 'invisible 'markdown-markup
+                     'font-lock-multiline t)))
+      (dolist (g '(1 2 4 5 8))
+        (when (match-end g)
+          (add-text-properties (match-beginning g) (match-end g) mp)
+          (add-face-text-property (match-beginning g) (match-end g) 'markdown-markup-face)))
+      (when link-start
+        (add-text-properties link-start link-end lp)
+        (add-face-text-property link-start link-end 'markdown-link-face))
+      (when ref-start
+        (add-text-properties ref-start ref-end rp)
+        (add-face-text-property ref-start ref-end 'markdown-reference-face)
+        (when (and markdown-hide-urls (> (- ref-end ref-start) 2))
+          (compose-region ref-start ref-end url-char)))
+      t)))
+
+(defun markdown-fontify-angle-uris (last)
+  "Add text properties to angle URIs from point to LAST."
+  (when (markdown-match-angle-uris last)
+    (let* ((url-start (match-beginning 2))
+           (url-end (match-end 2))
+           ;; Markup part
+           (mp (list 'face 'markdown-markup-face
+                     'invisible 'markdown-markup
+                     'rear-nonsticky t
+                     'font-lock-multiline t))
+           ;; URI part
+           (up (list 'keymap markdown-mode-mouse-map
+                     'face 'markdown-plain-url-face
+                     'mouse-face 'markdown-highlight-face
+                     'font-lock-multiline t)))
+      (dolist (g '(1 3))
+        (add-text-properties (match-beginning g) (match-end g) mp))
+      (add-text-properties url-start url-end up)
+      t)))
+
+(defun markdown-fontify-plain-uris (last)
+  "Add text properties to plain URLs from point to LAST."
+  (when (markdown-match-plain-uris last)
+    (let* ((start (match-beginning 0))
+           (end (match-end 0))
+           (props (list 'keymap markdown-mode-mouse-map
+                        'face 'markdown-plain-url-face
+                        'mouse-face 'markdown-highlight-face
+                        'rear-nonsticky t
+                        'font-lock-multiline t)))
+      (add-text-properties start end props)
+      t)))
+
+(defun markdown-toggle-url-hiding (&optional arg)
+  "Toggle the display or hiding of URLs.
+With a prefix argument ARG, enable URL hiding if ARG is positive,
+and disable it otherwise."
+  (interactive (list (or current-prefix-arg 'toggle)))
+  (setq markdown-hide-urls
+        (if (eq arg 'toggle)
+            (not markdown-hide-urls)
+          (> (prefix-numeric-value arg) 0)))
+  (if markdown-hide-urls
+      (message "markdown-mode URL hiding enabled")
+    (message "markdown-mode URL hiding disabled"))
+  (markdown-reload-extensions))
+
+
+;;; Wiki Links ================================================================
+
+(defun markdown-wiki-link-p ()
+  "Return non-nil if wiki links are enabled and `point' is at a true wiki link.
+A true wiki link name matches `markdown-regex-wiki-link' but does
+not match the current file name after conversion.  This modifies
+the data returned by `match-data'.  Note that the potential wiki
+link name must be available via `match-string'."
+  (when markdown-enable-wiki-links
+    (let ((case-fold-search nil))
+      (and (thing-at-point-looking-at markdown-regex-wiki-link)
+           (not (markdown-code-block-at-point-p))
+           (or (not buffer-file-name)
+               (not (string-equal (buffer-file-name)
+                                  (markdown-convert-wiki-link-to-filename
+                                   (markdown-wiki-link-link)))))))))
+
+(defun markdown-wiki-link-link ()
+  "Return the link part of the wiki link using current match data.
+The location of the link component depends on the value of
+`markdown-wiki-link-alias-first'."
+  (if markdown-wiki-link-alias-first
+      (or (match-string-no-properties 5) (match-string-no-properties 3))
+    (match-string-no-properties 3)))
+
+(defun markdown-wiki-link-alias ()
+  "Return the alias or text part of the wiki link using current match data.
+The location of the alias component depends on the value of
+`markdown-wiki-link-alias-first'."
+  (if markdown-wiki-link-alias-first
+      (match-string-no-properties 3)
+    (or (match-string-no-properties 5) (match-string-no-properties 3))))
+
+(defun markdown--wiki-link-search-types ()
+  (let ((ret (and markdown-wiki-link-search-type
+                  (cl-copy-list markdown-wiki-link-search-type))))
+    (when (and markdown-wiki-link-search-subdirectories
+               (not (memq 'sub-directories markdown-wiki-link-search-type)))
+      (push 'sub-directories ret))
+    (when (and markdown-wiki-link-search-parent-directories
+               (not (memq 'parent-directories markdown-wiki-link-search-type)))
+      (push 'parent-directories ret))
+    ret))
+
+(defun markdown--project-root ()
+  (or (cl-loop for dir in '(".git" ".hg" ".svn")
+               when (locate-dominating-file default-directory dir)
+               return it)
+      (progn
+        (require 'project)
+        (let ((project (project-current t)))
+          (with-no-warnings
+            (if (fboundp 'project-root)
+                (project-root project)
+              (car (project-roots project))))))))
+
+(defun markdown-convert-wiki-link-to-filename (name)
+  "Generate a filename from the wiki link NAME.
+Spaces in NAME are replaced with `markdown-link-space-sub-char'.
+When in `gfm-mode', follow GitHub's conventions where [[Test Test]]
+and [[test test]] both map to Test-test.ext.  Look in the current
+directory first, then in subdirectories if
+`markdown-wiki-link-search-subdirectories' is non-nil, and then
+in parent directories if
+`markdown-wiki-link-search-parent-directories' is non-nil."
+  (save-match-data
+    ;; This function must not overwrite match data(PR #590)
+    (let* ((basename (replace-regexp-in-string
+                      "[[:space:]\n]" markdown-link-space-sub-char name))
+           (basename (if (derived-mode-p 'gfm-mode)
+                         (concat (upcase (substring basename 0 1))
+                                 (downcase (substring basename 1 nil)))
+                       basename))
+           (search-types (markdown--wiki-link-search-types))
+           directory extension default candidates dir)
+      (when buffer-file-name
+        (setq directory (file-name-directory buffer-file-name)
+              extension (file-name-extension buffer-file-name)))
+      (setq default (concat basename
+                            (when extension (concat "." extension))))
+      (cond
+       ;; Look in current directory first.
+       ((or (null buffer-file-name)
+            (file-exists-p default))
+        default)
+       ;; Possibly search in subdirectories, next.
+       ((and (memq 'sub-directories search-types)
+             (setq candidates
+                   (directory-files-recursively
+                    directory (concat "^" default "$"))))
+        (car candidates))
+       ;; Possibly search in parent directories as a last resort.
+       ((and (memq 'parent-directories search-types)
+             (setq dir (locate-dominating-file directory default)))
+        (concat dir default))
+       ((and (memq 'project search-types)
+             (setq candidates
+                   (directory-files-recursively
+                    (markdown--project-root) (concat "^" default "$"))))
+        (car candidates))
+       ;; If nothing is found, return default in current directory.
+       (t default)))))
+
+(defun markdown-follow-wiki-link (name &optional other)
+  "Follow the wiki link NAME.
+Convert the name to a file name and call `find-file'.  Ensure that
+the new buffer remains in `markdown-mode'.  Open the link in another
+window when OTHER is non-nil."
+  (let ((filename (markdown-convert-wiki-link-to-filename name))
+        (wp (when buffer-file-name
+              (file-name-directory buffer-file-name))))
+    (if (not wp)
+        (user-error "Must be visiting a file")
+      (when other (other-window 1))
+      (let ((default-directory wp))
+        (find-file filename)))
+    (unless (derived-mode-p 'markdown-mode)
+      (markdown-mode))))
+
+(defun markdown-follow-wiki-link-at-point (&optional arg)
+  "Find Wiki Link at point.
+With prefix argument ARG, open the file in other window.
+See `markdown-wiki-link-p' and `markdown-follow-wiki-link'."
+  (interactive "P")
+  (if (markdown-wiki-link-p)
+      (markdown-follow-wiki-link (markdown-wiki-link-link) arg)
+    (user-error "Point is not at a Wiki Link")))
+
+(defun markdown-highlight-wiki-link (from to face)
+  "Highlight the wiki link in the region between FROM and TO using FACE."
+  (put-text-property from to 'font-lock-face face))
+
+(defun markdown-unfontify-region-wiki-links (from to)
+  "Remove wiki link faces from the region specified by FROM and TO."
+  (interactive "*r")
+  (let ((modified (buffer-modified-p)))
+    (remove-text-properties from to '(font-lock-face markdown-link-face))
+    (remove-text-properties from to '(font-lock-face markdown-missing-link-face))
+    ;; remove-text-properties marks the buffer modified in emacs 24.3,
+    ;; undo that if it wasn't originally marked modified
+    (set-buffer-modified-p modified)))
+
+(defun markdown-fontify-region-wiki-links (from to)
+  "Search region given by FROM and TO for wiki links and fontify them.
+If a wiki link is found check to see if the backing file exists
+and highlight accordingly."
+  (goto-char from)
+  (save-match-data
+    (while (re-search-forward markdown-regex-wiki-link to t)
+      (when (not (markdown-code-block-at-point-p))
+        (let ((highlight-beginning (match-beginning 1))
+              (highlight-end (match-end 1))
+              (file-name
+               (markdown-convert-wiki-link-to-filename
+                (markdown-wiki-link-link))))
+          (if (condition-case nil (file-exists-p file-name) (error nil))
+              (markdown-highlight-wiki-link
+               highlight-beginning highlight-end 'markdown-link-face)
+            (markdown-highlight-wiki-link
+             highlight-beginning highlight-end 'markdown-missing-link-face)))))))
+
+(defun markdown-extend-changed-region (from to)
+  "Extend region given by FROM and TO so that we can fontify all links.
+The region is extended to the first newline before and the first
+newline after."
+  ;; start looking for the first new line before 'from
+  (goto-char from)
+  (re-search-backward "\n" nil t)
+  (let ((new-from (point-min))
+        (new-to (point-max)))
+    (if (not (= (point) from))
+        (setq new-from (point)))
+    ;; do the same thing for the first new line after 'to
+    (goto-char to)
+    (re-search-forward "\n" nil t)
+    (if (not (= (point) to))
+        (setq new-to (point)))
+    (cl-values new-from new-to)))
+
+(defun markdown-check-change-for-wiki-link (from to)
+  "Check region between FROM and TO for wiki links and re-fontify as needed."
+  (interactive "*r")
+  (let* ((modified (buffer-modified-p))
+         (buffer-undo-list t)
+         (inhibit-read-only t)
+         (inhibit-point-motion-hooks t)
+         deactivate-mark
+         buffer-file-truename)
+    (unwind-protect
+        (save-excursion
+          (save-match-data
+            (save-restriction
+              ;; Extend the region to fontify so that it starts
+              ;; and ends at safe places.
+              (cl-multiple-value-bind (new-from new-to)
+                  (markdown-extend-changed-region from to)
+                (goto-char new-from)
+                ;; Only refontify when the range contains text with a
+                ;; wiki link face or if the wiki link regexp matches.
+                (when (or (markdown-range-property-any
+                           new-from new-to 'font-lock-face
+                           '(markdown-link-face markdown-missing-link-face))
+                          (re-search-forward
+                           markdown-regex-wiki-link new-to t))
+                  ;; Unfontify existing fontification (start from scratch)
+                  (markdown-unfontify-region-wiki-links new-from new-to)
+                  ;; Now do the fontification.
+                  (markdown-fontify-region-wiki-links new-from new-to))))))
+      (and (not modified)
+           (buffer-modified-p)
+           (set-buffer-modified-p nil)))))
+
+(defun markdown-check-change-for-wiki-link-after-change (from to _)
+  "Check region between FROM and TO for wiki links and re-fontify as needed.
+Designed to be used with the `after-change-functions' hook."
+  (markdown-check-change-for-wiki-link from to))
+
+(defun markdown-fontify-buffer-wiki-links ()
+  "Refontify all wiki links in the buffer."
+  (interactive)
+  (markdown-check-change-for-wiki-link (point-min) (point-max)))
+
+(defun markdown-toggle-wiki-links (&optional arg)
+  "Toggle support for wiki links.
+With a prefix argument ARG, enable wiki link support if ARG is positive,
+and disable it otherwise."
+  (interactive (list (or current-prefix-arg 'toggle)))
+  (setq markdown-enable-wiki-links
+        (if (eq arg 'toggle)
+            (not markdown-enable-wiki-links)
+          (> (prefix-numeric-value arg) 0)))
+  (if markdown-enable-wiki-links
+      (message "markdown-mode wiki link support enabled")
+    (message "markdown-mode wiki link support disabled"))
+  (markdown-reload-extensions))
+
+(defun markdown-setup-wiki-link-hooks ()
+  "Add or remove hooks for fontifying wiki links.
+These are only enabled when `markdown-wiki-link-fontify-missing' is non-nil."
+  ;; Anytime text changes make sure it gets fontified correctly
+  (if (and markdown-enable-wiki-links
+           markdown-wiki-link-fontify-missing)
+      (add-hook 'after-change-functions
+                #'markdown-check-change-for-wiki-link-after-change t t)
+    (remove-hook 'after-change-functions
+                 #'markdown-check-change-for-wiki-link-after-change t))
+  ;; If we left the buffer there is a really good chance we were
+  ;; creating one of the wiki link documents. Make sure we get
+  ;; refontified when we come back.
+  (if (and markdown-enable-wiki-links
+           markdown-wiki-link-fontify-missing)
+      (progn
+        (add-hook 'window-configuration-change-hook
+                  #'markdown-fontify-buffer-wiki-links t t)
+        (markdown-fontify-buffer-wiki-links))
+    (remove-hook 'window-configuration-change-hook
+                 #'markdown-fontify-buffer-wiki-links t)
+    (markdown-unfontify-region-wiki-links (point-min) (point-max))))
+
+
+;;; Following & Doing =========================================================
+
+(defun markdown-follow-thing-at-point (arg)
+  "Follow thing at point if possible, such as a reference link or wiki link.
+Opens inline and reference links in a browser.  Opens wiki links
+to other files in the current window, or the another window if
+ARG is non-nil.
+See `markdown-follow-link-at-point' and
+`markdown-follow-wiki-link-at-point'."
+  (interactive "P")
+  (cond ((markdown-link-p)
+         (markdown--browse-url (markdown-link-url)))
+        ((markdown-wiki-link-p)
+         (markdown-follow-wiki-link-at-point arg))
+        (t
+         (let* ((values (markdown-link-at-pos (point)))
+                (url (nth 3 values)))
+           (unless url
+             (user-error "Nothing to follow at point"))
+           (markdown--browse-url url)))))
+
+(defun markdown-do ()
+  "Do something sensible based on context at point.
+Jumps between reference links and definitions; between footnote
+markers and footnote text."
+  (interactive)
+  (cond
+   ;; Footnote definition
+   ((markdown-footnote-text-positions)
+    (markdown-footnote-return))
+   ;; Footnote marker
+   ((markdown-footnote-marker-positions)
+    (markdown-footnote-goto-text))
+   ;; Reference link
+   ((thing-at-point-looking-at markdown-regex-link-reference)
+    (markdown-reference-goto-definition))
+   ;; Reference definition
+   ((thing-at-point-looking-at markdown-regex-reference-definition)
+    (markdown-reference-goto-link (match-string-no-properties 2)))
+   ;; Link
+   ((or (markdown-link-p) (markdown-wiki-link-p))
+    (markdown-follow-thing-at-point nil))
+   ;; GFM task list item
+   ((markdown-gfm-task-list-item-at-point)
+    (markdown-toggle-gfm-checkbox))
+   ;; Align table
+   ((markdown-table-at-point-p)
+    (call-interactively #'markdown-table-align))
+   ;; Otherwise
+   (t
+    (markdown-insert-gfm-checkbox))))
+
+
+;;; Miscellaneous =============================================================
+
+(defun markdown-compress-whitespace-string (str)
+  "Compress whitespace in STR and return result.
+Leading and trailing whitespace is removed.  Sequences of multiple
+spaces, tabs, and newlines are replaced with single spaces."
+  (replace-regexp-in-string "\\(^[ \t\n]+\\|[ \t\n]+$\\)" ""
+                            (replace-regexp-in-string "[ \t\n]+" " " str)))
+
+(defun markdown--substitute-command-keys (string)
+  "Like `substitute-command-keys' but, but prefers control characters.
+First pass STRING to `substitute-command-keys' and then
+substitute `C-i` for `TAB` and `C-m` for `RET`."
+  (replace-regexp-in-string
+   "\\<TAB\\>" "C-i"
+   (replace-regexp-in-string
+    "\\<RET\\>" "C-m" (substitute-command-keys string) t) t))
+
+(defun markdown-line-number-at-pos (&optional pos)
+  "Return (narrowed) buffer line number at position POS.
+If POS is nil, use current buffer location.
+This is an exact copy of `line-number-at-pos' for use in emacs21."
+  (let ((opoint (or pos (point))) start)
+    (save-excursion
+      (goto-char (point-min))
+      (setq start (point))
+      (goto-char opoint)
+      (forward-line 0)
+      (1+ (count-lines start (point))))))
+
+(defun markdown-inside-link-p ()
+  "Return t if point is within a link."
+  (save-match-data
+    (thing-at-point-looking-at (markdown-make-regex-link-generic))))
+
+(defun markdown-line-is-reference-definition-p ()
+  "Return whether the current line is a (non-footnote) reference definition."
+  (save-excursion
+    (move-beginning-of-line 1)
+    (and (looking-at-p markdown-regex-reference-definition)
+         (not (looking-at-p "[ \t]*\\[^")))))
+
+(defun markdown-adaptive-fill-function ()
+  "Return prefix for filling paragraph or nil if not determined."
+  (cond
+   ;; List item inside blockquote
+   ((looking-at "^[ \t]*>[ \t]*\\(\\(?:[0-9]+\\|#\\)\\.\\|[*+:-]\\)[ \t]+")
+    (replace-regexp-in-string
+     "[0-9\\.*+-]" " " (match-string-no-properties 0)))
+   ;; Blockquote
+   ((looking-at markdown-regex-blockquote)
+    (buffer-substring-no-properties (match-beginning 0) (match-end 2)))
+   ;; List items
+   ((looking-at markdown-regex-list)
+    (match-string-no-properties 0))
+   ;; Footnote definition
+   ((looking-at-p markdown-regex-footnote-definition)
+    "    ") ; four spaces
+   ;; No match
+   (t nil)))
+
+(defun markdown-fill-paragraph (&optional justify)
+  "Fill paragraph at or after point.
+This function is like \\[fill-paragraph], but it skips Markdown
+code blocks.  If the point is in a code block, or just before one,
+do not fill.  Otherwise, call `fill-paragraph' as usual. If
+JUSTIFY is non-nil, justify text as well.  Since this function
+handles filling itself, it always returns t so that
+`fill-paragraph' doesn't run."
+  (interactive "P")
+  (unless (or (markdown-code-block-at-point-p)
+              (save-excursion
+                (back-to-indentation)
+                (skip-syntax-forward "-")
+                (markdown-code-block-at-point-p)))
+    (let ((fill-prefix (save-excursion
+                         (goto-char (line-beginning-position))
+                         (when (looking-at "\\([ \t]*>[ \t]*\\(?:>[ \t]*\\)+\\)")
+                           (match-string-no-properties 1)))))
+      (fill-paragraph justify)))
+  t)
+
+(defun markdown-fill-forward-paragraph (&optional arg)
+  "Function used by `fill-paragraph' to move over ARG paragraphs.
+This is a `fill-forward-paragraph-function' for `markdown-mode'.
+It is called with a single argument specifying the number of
+paragraphs to move.  Just like `forward-paragraph', it should
+return the number of paragraphs left to move."
+  (or arg (setq arg 1))
+  (if (> arg 0)
+      ;; With positive ARG, move across ARG non-code-block paragraphs,
+      ;; one at a time.  When passing a code block, don't decrement ARG.
+      (while (and (not (eobp))
+                  (> arg 0)
+                  (= (forward-paragraph 1) 0)
+                  (or (markdown-code-block-at-pos (line-beginning-position 0))
+                      (setq arg (1- arg)))))
+    ;; Move backward by one paragraph with negative ARG (always -1).
+    (let ((start (point)))
+      (setq arg (forward-paragraph arg))
+      (while (and (not (eobp))
+                  (progn (move-to-left-margin) (not (eobp)))
+                  (looking-at-p paragraph-separate))
+        (forward-line 1))
+      (cond
+       ;; Move point past whitespace following list marker.
+       ((looking-at markdown-regex-list)
+        (goto-char (match-end 0)))
+       ;; Move point past whitespace following pipe at beginning of line
+       ;; to handle Pandoc line blocks.
+       ((looking-at "^|\\s-*")
+        (goto-char (match-end 0)))
+       ;; Return point if the paragraph passed was a code block.
+       ((markdown-code-block-at-pos (line-beginning-position 2))
+        (goto-char start)))))
+  arg)
+
+(defun markdown--inhibit-electric-quote ()
+  "Function added to `electric-quote-inhibit-functions'.
+Return non-nil if the quote has been inserted inside a code block
+or span."
+  (let ((pos (1- (point))))
+    (or (markdown-inline-code-at-pos pos)
+        (markdown-code-block-at-pos pos))))
+
+
+;;; Extension Framework =======================================================
+
+(defun markdown-reload-extensions ()
+  "Check settings, update font-lock keywords and hooks, and re-fontify buffer."
+  (interactive)
+  (when (derived-mode-p 'markdown-mode)
+    ;; Refontify buffer
+    (font-lock-flush)
+    ;; Add or remove hooks related to extensions
+    (markdown-setup-wiki-link-hooks)))
+
+(defun markdown-handle-local-variables ()
+  "Run in `hack-local-variables-hook' to update font lock rules.
+Checks to see if there is actually a ‘markdown-mode’ file local variable
+before regenerating font-lock rules for extensions."
+  (when (or (assoc 'markdown-enable-wiki-links file-local-variables-alist)
+            (assoc 'markdown-enable-math file-local-variables-alist))
+    (when (assoc 'markdown-enable-math file-local-variables-alist)
+      (markdown-toggle-math markdown-enable-math))
+    (markdown-reload-extensions)))
+
+
+;;; Math Support ==============================================================
+
+(defconst markdown-mode-font-lock-keywords-math
+  (list
+   ;; Equation reference (eq:foo)
+   '("\\((eq:\\)\\([[:alnum:]:_]+\\)\\()\\)" . ((1 markdown-markup-face)
+                                                (2 markdown-reference-face)
+                                                (3 markdown-markup-face)))
+   ;; Equation reference \eqref{foo}
+   '("\\(\\\\eqref{\\)\\([[:alnum:]:_]+\\)\\(}\\)" . ((1 markdown-markup-face)
+                                                      (2 markdown-reference-face)
+                                                      (3 markdown-markup-face))))
+  "Font lock keywords to add and remove when toggling math support.")
+
+(defun markdown-toggle-math (&optional arg)
+  "Toggle support for inline and display LaTeX math expressions.
+With a prefix argument ARG, enable math mode if ARG is positive,
+and disable it otherwise.  If called from Lisp, enable the mode
+if ARG is omitted or nil."
+  (interactive (list (or current-prefix-arg 'toggle)))
+  (setq markdown-enable-math
+        (if (eq arg 'toggle)
+            (not markdown-enable-math)
+          (> (prefix-numeric-value arg) 0)))
+  (if markdown-enable-math
+      (progn
+        (font-lock-add-keywords
+         'markdown-mode markdown-mode-font-lock-keywords-math)
+        (message "markdown-mode math support enabled"))
+    (font-lock-remove-keywords
+     'markdown-mode markdown-mode-font-lock-keywords-math)
+    (message "markdown-mode math support disabled"))
+  (markdown-reload-extensions))
+
+
+;;; GFM Checkboxes ============================================================
+
+(define-button-type 'markdown-gfm-checkbox-button
+  'follow-link t
+  'face 'markdown-gfm-checkbox-face
+  'mouse-face 'markdown-highlight-face
+  'action #'markdown-toggle-gfm-checkbox-button)
+
+(defun markdown-gfm-task-list-item-at-point (&optional bounds)
+  "Return non-nil if there is a GFM task list item at the point.
+Optionally, the list item BOUNDS may be given if available, as
+returned by `markdown-cur-list-item-bounds'.  When a task list item
+is found, the return value is the same value returned by
+`markdown-cur-list-item-bounds'."
+  (unless bounds
+    (setq bounds (markdown-cur-list-item-bounds)))
+  (> (length (nth 5 bounds)) 0))
+
+(defun markdown-insert-gfm-checkbox ()
+  "Add GFM checkbox at point.
+Returns t if added.
+Returns nil if non-applicable."
+  (interactive)
+  (let ((bounds (markdown-cur-list-item-bounds)))
+    (if bounds
+        (unless (cl-sixth bounds)
+          (let ((pos (+ (cl-first bounds) (cl-fourth bounds)))
+                (markup "[ ] "))
+            (if (< pos (point))
+                (save-excursion
+                  (goto-char pos)
+                  (insert markup))
+              (goto-char pos)
+              (insert markup))
+            (syntax-propertize (+ (cl-second bounds) 4))
+            t))
+      (unless (save-excursion
+                (back-to-indentation)
+                (or (markdown-list-item-at-point-p)
+                    (markdown-heading-at-point)
+                    (markdown-in-comment-p)
+                    (markdown-code-block-at-point-p)))
+        (let ((pos (save-excursion
+                     (back-to-indentation)
+                     (point)))
+              (markup (concat (or (save-excursion
+                                    (beginning-of-line 0)
+                                    (cl-fifth (markdown-cur-list-item-bounds)))
+                                  markdown-unordered-list-item-prefix)
+                              "[ ] ")))
+          (if (< pos (point))
+              (save-excursion
+                (goto-char pos)
+                (insert markup))
+            (goto-char pos)
+            (insert markup))
+          (syntax-propertize (line-end-position))
+          t)))))
+
+(defun markdown-toggle-gfm-checkbox ()
+  "Toggle GFM checkbox at point.
+Returns the resulting status as a string, either \"[x]\" or \"[ ]\".
+Returns nil if there is no task list item at the point."
+  (interactive)
+  (save-match-data
+    (save-excursion
+      (let ((bounds (markdown-cur-list-item-bounds)))
+        (when bounds
+          ;; Move to beginning of task list item
+          (goto-char (cl-first bounds))
+          ;; Advance to column of first non-whitespace after marker
+          (forward-char (cl-fourth bounds))
+          (cond ((looking-at "\\[ \\]")
+                 (replace-match
+                  (if markdown-gfm-uppercase-checkbox "[X]" "[x]")
+                  nil t)
+                 (match-string-no-properties 0))
+                ((looking-at "\\[[xX]\\]")
+                 (replace-match "[ ]" nil t)
+                 (match-string-no-properties 0))))))))
+
+(defun markdown-toggle-gfm-checkbox-button (button)
+  "Toggle GFM checkbox BUTTON on click."
+  (save-match-data
+    (save-excursion
+      (goto-char (button-start button))
+      (markdown-toggle-gfm-checkbox))))
+
+(defun markdown-make-gfm-checkboxes-buttons (start end)
+  "Make GFM checkboxes buttons in region between START and END."
+  (save-excursion
+    (goto-char start)
+    (let ((case-fold-search t))
+      (save-excursion
+        (while (re-search-forward markdown-regex-gfm-checkbox end t)
+          (make-button (match-beginning 1) (match-end 1)
+                       :type 'markdown-gfm-checkbox-button))))))
+
+;; Called when any modification is made to buffer text.
+(defun markdown-gfm-checkbox-after-change-function (beg end _)
+  "Add to `after-change-functions' to setup GFM checkboxes as buttons.
+BEG and END are the limits of scanned region."
+  (save-excursion
+    (save-match-data
+      ;; Rescan between start of line from `beg' and start of line after `end'.
+      (markdown-make-gfm-checkboxes-buttons
+       (progn (goto-char beg) (beginning-of-line) (point))
+       (progn (goto-char end) (forward-line 1) (point))))))
+
+(defun markdown-remove-gfm-checkbox-overlays ()
+  "Remove all GFM checkbox overlays in buffer."
+  (save-excursion
+    (save-restriction
+      (widen)
+      (remove-overlays nil nil 'face 'markdown-gfm-checkbox-face))))
+
+
+;;; Display inline image ======================================================
+
+(defvar-local markdown-inline-image-overlays nil)
+
+(defun markdown-remove-inline-images ()
+  "Remove inline image overlays from image links in the buffer.
+This can be toggled with `markdown-toggle-inline-images'
+or \\[markdown-toggle-inline-images]."
+  (interactive)
+  (mapc #'delete-overlay markdown-inline-image-overlays)
+  (setq markdown-inline-image-overlays nil))
+
+(defcustom markdown-display-remote-images nil
+  "If non-nil, download and display remote images.
+See also `markdown-inline-image-overlays'.
+
+Only image URLs specified with a protocol listed in
+`markdown-remote-image-protocols' are displayed."
+  :group 'markdown
+  :type 'boolean)
+
+(defcustom markdown-remote-image-protocols '("https")
+  "List of protocols to use to download remote images.
+See also `markdown-display-remote-images'."
+  :group 'markdown
+  :type '(repeat string))
+
+(defvar markdown--remote-image-cache
+  (make-hash-table :test 'equal)
+  "A map from URLs to image paths.")
+
+(defun markdown--get-remote-image (url)
+  "Retrieve the image path for a given URL."
+  (or (gethash url markdown--remote-image-cache)
+      (let ((dl-path (make-temp-file "markdown-mode--image")))
+        (require 'url)
+        (url-copy-file url dl-path t)
+        (puthash url dl-path markdown--remote-image-cache))))
+
+(defun markdown-display-inline-images ()
+  "Add inline image overlays to image links in the buffer.
+This can be toggled with `markdown-toggle-inline-images'
+or \\[markdown-toggle-inline-images]."
+  (interactive)
+  (unless (display-images-p)
+    (error "Cannot show images"))
+  (save-excursion
+    (save-restriction
+      (widen)
+      (goto-char (point-min))
+      (while (re-search-forward markdown-regex-link-inline nil t)
+        (let* ((start (match-beginning 0))
+               (imagep (match-beginning 1))
+               (end (match-end 0))
+               (file (match-string-no-properties 6)))
+          (when (and imagep
+                     (not (zerop (length file))))
+            (unless (file-exists-p file)
+              (let* ((download-file (funcall markdown-translate-filename-function file))
+                     (valid-url (ignore-errors
+                                  (member (downcase (url-type (url-generic-parse-url download-file)))
+                                          markdown-remote-image-protocols))))
+                (if (and markdown-display-remote-images valid-url)
+                    (setq file (markdown--get-remote-image download-file))
+                  (when (not valid-url)
+                    ;; strip query parameter
+                    (setq file (replace-regexp-in-string "?.+\\'" "" file))
+                    (unless (file-exists-p file)
+                      (setq file (url-unhex-string file)))))))
+            (when (file-exists-p file)
+              (let* ((abspath (if (file-name-absolute-p file)
+                                  file
+                                (concat default-directory file)))
+                     (image
+                      (cond ((and markdown-max-image-size
+                                  (image-type-available-p 'imagemagick))
+                             (create-image
+                              abspath 'imagemagick nil
+                              :max-width (car markdown-max-image-size)
+                              :max-height (cdr markdown-max-image-size)))
+                            (markdown-max-image-size
+                             (create-image abspath nil nil
+                                           :max-width (car markdown-max-image-size)
+                                           :max-height (cdr markdown-max-image-size)))
+                            (t (create-image abspath)))))
+                (when image
+                  (let ((ov (make-overlay start end)))
+                    (overlay-put ov 'display image)
+                    (overlay-put ov 'face 'default)
+                    (push ov markdown-inline-image-overlays)))))))))))
+
+(defun markdown-toggle-inline-images ()
+  "Toggle inline image overlays in the buffer."
+  (interactive)
+  (if markdown-inline-image-overlays
+      (markdown-remove-inline-images)
+    (markdown-display-inline-images)))
+
+
+;;; GFM Code Block Fontification ==============================================
+
+(defcustom markdown-fontify-code-blocks-natively nil
+  "When non-nil, fontify code in code blocks using the native major mode.
+This only works for fenced code blocks where the language is
+specified where we can automatically determine the appropriate
+mode to use.  The language to mode mapping may be customized by
+setting the variable `markdown-code-lang-modes'."
+  :group 'markdown
+  :type 'boolean
+  :safe #'booleanp
+  :package-version '(markdown-mode . "2.3"))
+
+(defcustom markdown-fontify-code-block-default-mode nil
+  "Default mode to use to fontify code blocks.
+This mode is used when automatic detection fails, such as for GFM
+code blocks with no language specified."
+  :group 'markdown
+  :type '(choice function (const :tag "None" nil))
+  :package-version '(markdown-mode . "2.4"))
+
+(defun markdown-toggle-fontify-code-blocks-natively (&optional arg)
+  "Toggle the native fontification of code blocks.
+With a prefix argument ARG, enable if ARG is positive,
+and disable otherwise."
+  (interactive (list (or current-prefix-arg 'toggle)))
+  (setq markdown-fontify-code-blocks-natively
+        (if (eq arg 'toggle)
+            (not markdown-fontify-code-blocks-natively)
+          (> (prefix-numeric-value arg) 0)))
+  (if markdown-fontify-code-blocks-natively
+      (message "markdown-mode native code block fontification enabled")
+    (message "markdown-mode native code block fontification disabled"))
+  (markdown-reload-extensions))
+
+;; This is based on `org-src-lang-modes' from org-src.el
+(defcustom markdown-code-lang-modes
+  '(("ocaml" . tuareg-mode) ("elisp" . emacs-lisp-mode) ("ditaa" . artist-mode)
+    ("asymptote" . asy-mode) ("dot" . fundamental-mode) ("sqlite" . sql-mode)
+    ("calc" . fundamental-mode) ("C" . c-mode) ("cpp" . c++-mode)
+    ("C++" . c++-mode) ("screen" . shell-script-mode) ("shell" . sh-mode)
+    ("bash" . sh-mode))
+  "Alist mapping languages to their major mode.
+The key is the language name, the value is the major mode.  For
+many languages this is simple, but for language where this is not
+the case, this variable provides a way to simplify things on the
+user side.  For example, there is no ocaml-mode in Emacs, but the
+mode to use is `tuareg-mode'."
+  :group 'markdown
+  :type '(repeat
+          (cons
+           (string "Language name")
+           (symbol "Major mode")))
+  :package-version '(markdown-mode . "2.3"))
+
+(defun markdown-get-lang-mode (lang)
+  "Return major mode that should be used for LANG.
+LANG is a string, and the returned major mode is a symbol."
+  (cl-find-if
+   'fboundp
+   (list (cdr (assoc lang markdown-code-lang-modes))
+         (cdr (assoc (downcase lang) markdown-code-lang-modes))
+         (intern (concat lang "-mode"))
+         (intern (concat (downcase lang) "-mode")))))
+
+(defun markdown-fontify-code-blocks-generic (matcher last)
+  "Add text properties to next code block from point to LAST.
+Use matching function MATCHER."
+  (when (funcall matcher last)
+    (save-excursion
+      (save-match-data
+        (let* ((start (match-beginning 0))
+               (end (match-end 0))
+               ;; Find positions outside opening and closing backquotes.
+               (bol-prev (progn (goto-char start)
+                                (if (bolp) (line-beginning-position 0) (line-beginning-position))))
+               (eol-next (progn (goto-char end)
+                                (if (bolp) (line-beginning-position 2) (line-beginning-position 3))))
+               lang)
+          (if (and markdown-fontify-code-blocks-natively
+                   (or (setq lang (markdown-code-block-lang))
+                       markdown-fontify-code-block-default-mode))
+              (markdown-fontify-code-block-natively lang start end)
+            (add-text-properties start end '(face markdown-pre-face)))
+          ;; Set background for block as well as opening and closing lines.
+          (font-lock-append-text-property
+           bol-prev eol-next 'face 'markdown-code-face)
+          ;; Set invisible property for lines before and after, including newline.
+          (add-text-properties bol-prev start '(invisible markdown-markup))
+          (add-text-properties end eol-next '(invisible markdown-markup)))))
+    t))
+
+(defun markdown-fontify-gfm-code-blocks (last)
+  "Add text properties to next GFM code block from point to LAST."
+  (markdown-fontify-code-blocks-generic 'markdown-match-gfm-code-blocks last))
+
+(defun markdown-fontify-fenced-code-blocks (last)
+  "Add text properties to next tilde fenced code block from point to LAST."
+  (markdown-fontify-code-blocks-generic 'markdown-match-fenced-code-blocks last))
+
+;; Based on `org-src-font-lock-fontify-block' from org-src.el.
+(defun markdown-fontify-code-block-natively (lang start end)
+  "Fontify given GFM or fenced code block.
+This function is called by Emacs for automatic fontification when
+`markdown-fontify-code-blocks-natively' is non-nil.  LANG is the
+language used in the block. START and END specify the block
+position."
+  (let ((lang-mode (if lang (markdown-get-lang-mode lang)
+                     markdown-fontify-code-block-default-mode)))
+    (when (fboundp lang-mode)
+      (let ((string (buffer-substring-no-properties start end))
+            (modified (buffer-modified-p))
+            (markdown-buffer (current-buffer)) pos next)
+        (remove-text-properties start end '(face nil))
+        (with-current-buffer
+            (get-buffer-create
+             (concat " markdown-code-fontification:" (symbol-name lang-mode)))
+          ;; Make sure that modification hooks are not inhibited in
+          ;; the org-src-fontification buffer in case we're called
+          ;; from `jit-lock-function' (Bug#25132).
+          (let ((inhibit-modification-hooks nil))
+            (delete-region (point-min) (point-max))
+            (insert string " ")) ;; so there's a final property change
+          (unless (eq major-mode lang-mode) (funcall lang-mode))
+          (font-lock-ensure)
+          (setq pos (point-min))
+          (while (setq next (next-single-property-change pos 'face))
+            (let ((val (get-text-property pos 'face)))
+              (when val
+                (put-text-property
+                 (+ start (1- pos)) (1- (+ start next)) 'face
+                 val markdown-buffer)))
+            (setq pos next)))
+        (add-text-properties
+         start end
+         '(font-lock-fontified t fontified t font-lock-multiline t))
+        (set-buffer-modified-p modified)))))
+
+(require 'edit-indirect nil t)
+(defvar edit-indirect-guess-mode-function)
+(defvar edit-indirect-after-commit-functions)
+
+(defun markdown--edit-indirect-after-commit-function (beg end)
+  "Corrective logic run on code block content from lines BEG to END.
+Restores code block indentation from BEG to END, and ensures trailing newlines
+at the END of code blocks."
+  ;; ensure trailing newlines
+  (goto-char end)
+  (unless (eq (char-before) ?\n)
+    (insert "\n"))
+  ;; restore code block indentation
+  (goto-char (- beg 1))
+  (let ((block-indentation (current-indentation)))
+    (when (> block-indentation 0)
+      (indent-rigidly beg end block-indentation)))
+  (font-lock-ensure))
+
+(defun markdown-edit-code-block ()
+  "Edit Markdown code block in an indirect buffer."
+  (interactive)
+  (save-excursion
+    (if (fboundp 'edit-indirect-region)
+        (let* ((bounds (markdown-get-enclosing-fenced-block-construct))
+               (begin (and bounds (not (null (nth 0 bounds))) (goto-char (nth 0 bounds)) (line-beginning-position 2)))
+               (end (and bounds(not (null (nth 1 bounds)))  (goto-char (nth 1 bounds)) (line-beginning-position 1))))
+          (if (and begin end)
+              (let* ((indentation (and (goto-char (nth 0 bounds)) (current-indentation)))
+                     (lang (markdown-code-block-lang))
+                     (mode (or (and lang (markdown-get-lang-mode lang))
+                               markdown-edit-code-block-default-mode))
+                     (edit-indirect-guess-mode-function
+                      (lambda (_parent-buffer _beg _end)
+                        (funcall mode)))
+                     (indirect-buf (edit-indirect-region begin end 'display-buffer)))
+                ;; reset `sh-shell' when indirect buffer
+                (when (and (not (member system-type '(ms-dos windows-nt)))
+                           (member mode '(shell-script-mode sh-mode))
+                           (member lang (append
+                                         (mapcar (lambda (e) (symbol-name (car e)))
+                                                 sh-ancestor-alist)
+                                         '("csh" "rc" "sh"))))
+                  (with-current-buffer indirect-buf
+                    (sh-set-shell lang)))
+                (when (> indentation 0) ;; un-indent in edit-indirect buffer
+                  (with-current-buffer indirect-buf
+                    (indent-rigidly (point-min) (point-max) (- indentation)))))
+            (user-error "Not inside a GFM or tilde fenced code block")))
+      (when (y-or-n-p "Package edit-indirect needed to edit code blocks. Install it now? ")
+        (progn (package-refresh-contents)
+               (package-install 'edit-indirect)
+               (markdown-edit-code-block))))))
+
+
+;;; Table Editing =============================================================
+
+;; These functions were originally adapted from `org-table.el'.
+
+;; General helper functions
+
+(defmacro markdown--with-gensyms (symbols &rest body)
+  (declare (debug (sexp body)) (indent 1))
+  `(let ,(mapcar (lambda (s)
+                   `(,s (make-symbol (concat "--" (symbol-name ',s)))))
+                 symbols)
+     ,@body))
+
+(defun markdown--split-string (string &optional separators)
+  "Splits STRING into substrings at SEPARATORS.
+SEPARATORS is a regular expression. If nil it defaults to
+`split-string-default-separators'. This version returns no empty
+strings if there are matches at the beginning and end of string."
+  (let ((start 0) notfirst list)
+    (while (and (string-match
+                 (or separators split-string-default-separators)
+                 string
+                 (if (and notfirst
+                          (= start (match-beginning 0))
+                          (< start (length string)))
+                     (1+ start) start))
+                (< (match-beginning 0) (length string)))
+      (setq notfirst t)
+      (or (eq (match-beginning 0) 0)
+          (and (eq (match-beginning 0) (match-end 0))
+               (eq (match-beginning 0) start))
+          (push (substring string start (match-beginning 0)) list))
+      (setq start (match-end 0)))
+    (or (eq start (length string))
+        (push (substring string start) list))
+    (nreverse list)))
+
+(defun markdown--string-width (s)
+  "Return width of string S.
+This version ignores characters with invisibility property
+`markdown-markup'."
+  (let (b)
+    (when (or (eq t buffer-invisibility-spec)
+              (member 'markdown-markup buffer-invisibility-spec))
+      (while (setq b (text-property-any
+                      0 (length s)
+                      'invisible 'markdown-markup s))
+        (setq s (concat
+                 (substring s 0 b)
+                 (substring s (or (next-single-property-change
+                                   b 'invisible s)
+                                  (length s))))))))
+  (string-width s))
+
+(defun markdown--remove-invisible-markup (s)
+  "Remove Markdown markup from string S.
+This version removes characters with invisibility property
+`markdown-markup'."
+  (let (b)
+    (while (setq b (text-property-any
+                    0 (length s)
+                    'invisible 'markdown-markup s))
+      (setq s (concat
+               (substring s 0 b)
+               (substring s (or (next-single-property-change
+                                 b 'invisible s)
+                                (length s)))))))
+  s)
+
+;; Functions for maintaining tables
+
+(defvar markdown-table-at-point-p-function #'markdown--table-at-point-p
+  "Function to decide if point is inside a table.
+
+The indirection serves to differentiate between standard markdown
+tables and gfm tables which are less strict about the markup.")
+
+(defconst markdown-table-line-regexp "^[ \t]*|"
+  "Regexp matching any line inside a table.")
+
+(defconst markdown-table-hline-regexp "^[ \t]*|[-:]"
+  "Regexp matching hline inside a table.")
+
+(defconst markdown-table-dline-regexp "^[ \t]*|[^-:]"
+  "Regexp matching dline inside a table.")
+
+(defun markdown-table-at-point-p ()
+  "Return non-nil when point is inside a table."
+  (funcall markdown-table-at-point-p-function))
+
+(defun markdown--table-at-point-p ()
+  "Return non-nil when point is inside a table."
+  (save-excursion
+    (beginning-of-line)
+    (and (looking-at-p markdown-table-line-regexp)
+         (not (markdown-code-block-at-point-p)))))
+
+(defconst gfm-table-line-regexp "^.?*|"
+  "Regexp matching any line inside a table.")
+
+(defconst gfm-table-hline-regexp "^-+\\(|-\\)+"
+  "Regexp matching hline inside a table.")
+
+;; GFM simplified tables syntax is as follows:
+;; - A header line for the column names, this is any text
+;;   separated by `|'.
+;; - Followed by a string -|-|- ..., the number of dashes is optional
+;;   but must be higher than 1. The number of separators should match
+;;   the number of columns.
+;; - Followed by the rows of data, which has the same format as the
+;;   header line.
+;; Example:
+;;
+;; foo | bar
+;; ------|---------
+;; bar | baz
+;; bar | baz
+(defun gfm--table-at-point-p ()
+  "Return non-nil when point is inside a gfm-compatible table."
+  (or (markdown--table-at-point-p)
+      (save-excursion
+        (beginning-of-line)
+        (when (looking-at-p gfm-table-line-regexp)
+          ;; we might be at the first line of the table, check if the
+          ;; line below is the hline
+          (or (save-excursion
+                (forward-line 1)
+                (looking-at-p gfm-table-hline-regexp))
+              ;; go up to find the header
+              (catch 'done
+                (while (looking-at-p gfm-table-line-regexp)
+                  (cond
+                   ((looking-at-p gfm-table-hline-regexp)
+                    (throw 'done t))
+                   ((bobp)
+                    (throw 'done nil)))
+                  (forward-line -1))
+                nil))))))
+
+(defun markdown-table-hline-at-point-p ()
+  "Return non-nil when point is on a hline in a table.
+This function assumes point is on a table."
+  (save-excursion
+    (beginning-of-line)
+    (looking-at-p markdown-table-hline-regexp)))
+
+(defun markdown-table-begin ()
+  "Find the beginning of the table and return its position.
+This function assumes point is on a table."
+  (save-excursion
+    (while (and (not (bobp))
+                (markdown-table-at-point-p))
+      (forward-line -1))
+    (unless (or (eobp)
+                (markdown-table-at-point-p))
+      (forward-line 1))
+    (point)))
+
+(defun markdown-table-end ()
+  "Find the end of the table and return its position.
+This function assumes point is on a table."
+  (save-excursion
+    (while (and (not (eobp))
+                (markdown-table-at-point-p))
+      (forward-line 1))
+    (point)))
+
+(defun markdown-table-get-dline ()
+  "Return index of the table data line at point.
+This function assumes point is on a table."
+  (let ((pos (point)) (end (markdown-table-end)) (cnt 0))
+    (save-excursion
+      (goto-char (markdown-table-begin))
+      (while (and (re-search-forward
+                   markdown-table-dline-regexp end t)
+                  (setq cnt (1+ cnt))
+                  (< (line-end-position) pos))))
+    cnt))
+
+(defun markdown--thing-at-wiki-link (pos)
+  (when markdown-enable-wiki-links
+    (save-excursion
+      (save-match-data
+        (goto-char pos)
+        (thing-at-point-looking-at markdown-regex-wiki-link)))))
+
+(defun markdown-table-get-column ()
+  "Return table column at point.
+This function assumes point is on a table."
+  (let ((pos (point)) (cnt 0))
+    (save-excursion
+      (beginning-of-line)
+      (while (search-forward "|" pos t)
+        (when (and (not (looking-back "\\\\|" (line-beginning-position)))
+                   (not (markdown--thing-at-wiki-link (match-beginning 0))))
+          (setq cnt (1+ cnt)))))
+    cnt))
+
+(defun markdown-table-get-cell (&optional n)
+  "Return the content of the cell in column N of current row.
+N defaults to column at point. This function assumes point is on
+a table."
+  (and n (markdown-table-goto-column n))
+  (skip-chars-backward "^|\n") (backward-char 1)
+  (if (looking-at "|[^|\r\n]*")
+      (let* ((pos (match-beginning 0))
+             (val (buffer-substring (1+ pos) (match-end 0))))
+        (goto-char (min (line-end-position) (+ 2 pos)))
+        ;; Trim whitespaces
+        (setq val (replace-regexp-in-string "\\`[ \t]+" "" val)
+              val (replace-regexp-in-string "[ \t]+\\'" "" val)))
+    (forward-char 1) ""))
+
+(defun markdown-table-goto-dline (n)
+  "Go to the Nth data line in the table at point.
+Return t when the line exists, nil otherwise. This function
+assumes point is on a table."
+  (goto-char (markdown-table-begin))
+  (let ((end (markdown-table-end)) (cnt 0))
+    (while (and (re-search-forward
+                 markdown-table-dline-regexp end t)
+                (< (setq cnt (1+ cnt)) n)))
+    (= cnt n)))
+
+(defun markdown-table-goto-column (n &optional on-delim)
+  "Go to the Nth column in the table line at point.
+With optional argument ON-DELIM, stop with point before the left
+delimiter of the cell. If there are less than N cells, just go
+beyond the last delimiter. This function assumes point is on a
+table."
+  (beginning-of-line 1)
+  (when (> n 0)
+    (while (and (> n 0) (search-forward "|" (line-end-position) t))
+      (when (and (not (looking-back "\\\\|" (line-beginning-position)))
+                 (not (markdown--thing-at-wiki-link (match-beginning 0))))
+        (cl-decf n)))
+    (if on-delim
+        (backward-char 1)
+      (when (looking-at " ") (forward-char 1)))))
+
+(defmacro markdown-table-save-cell (&rest body)
+  "Save cell at point, execute BODY and restore cell.
+This function assumes point is on a table."
+  (declare (debug (body)))
+  (markdown--with-gensyms (line column)
+    `(let ((,line (copy-marker (line-beginning-position)))
+           (,column (markdown-table-get-column)))
+       (unwind-protect
+           (progn ,@body)
+         (goto-char ,line)
+         (markdown-table-goto-column ,column)
+         (set-marker ,line nil)))))
+
+(defun markdown-table-blank-line (s)
+  "Convert a table line S into a line with blank cells."
+  (if (string-match "^[ \t]*|-" s)
+      (setq s (mapconcat
+               (lambda (x) (if (member x '(?| ?+)) "|" " "))
+               s ""))
+    (with-temp-buffer
+      (insert s)
+      (goto-char (point-min))
+      (when (re-search-forward "|" nil t)
+        (let ((cur (point))
+              ret)
+          (while (re-search-forward "|" nil t)
+            (when (and (not (eql (char-before (match-beginning 0)) ?\\))
+                       (not (markdown--thing-at-wiki-link (match-beginning 0))))
+              (push (make-string (- (match-beginning 0) cur) ? ) ret)
+              (setq cur (match-end 0))))
+          (format "|%s|" (string-join (nreverse ret) "|")))))))
+
+(defun markdown-table-colfmt (fmtspec)
+  "Process column alignment specifier FMTSPEC for tables."
+  (when (stringp fmtspec)
+    (mapcar (lambda (x)
+              (cond ((string-match-p "^:.*:$" x) 'c)
+                    ((string-match-p "^:"     x) 'l)
+                    ((string-match-p ":$"     x) 'r)
+                    (t 'd)))
+            (markdown--split-string fmtspec "\\s-*|\\s-*"))))
+
+(defun markdown--first-column-p (bar-pos)
+  (save-excursion
+    (save-match-data
+      (goto-char bar-pos)
+      (looking-back "^\\s-*" (line-beginning-position)))))
+
+(defun markdown--table-line-to-columns (line)
+  (with-temp-buffer
+    (insert line)
+    (goto-char (point-min))
+    (let ((cur (point))
+          ret)
+      (while (re-search-forward "\\s-*\\(|\\)\\s-*" nil t)
+        (if (markdown--first-column-p (match-beginning 1))
+            (setq cur (match-end 0))
+          (cond ((eql (char-before (match-beginning 1)) ?\\)
+                 ;; keep spaces
+                 (goto-char (match-end 1)))
+                ((markdown--thing-at-wiki-link (match-beginning 1))) ;; do nothing
+                (t
+                 (push (buffer-substring-no-properties cur (match-beginning 0)) ret)
+                 (setq cur (match-end 0))))))
+      (when (< cur (length line))
+        (push (buffer-substring-no-properties cur (point-max)) ret))
+      (nreverse ret))))
+
+(defun markdown-table-align ()
+  "Align table at point.
+This function assumes point is on a table."
+  (interactive)
+  (let ((begin (markdown-table-begin))
+        (end (copy-marker (markdown-table-end))))
+    (markdown-table-save-cell
+     (goto-char begin)
+     (let* (fmtspec
+            ;; Store table indent
+            (indent (progn (looking-at "[ \t]*") (match-string 0)))
+            ;; Split table in lines and save column format specifier
+            (lines (mapcar (lambda (l)
+                             (if (string-match-p "\\`[ \t]*|[ \t]*[-:]" l)
+                                 (progn (setq fmtspec (or fmtspec l)) nil) l))
+                           (markdown--split-string (buffer-substring begin end) "\n")))
+            ;; Split lines in cells
+            (cells (mapcar (lambda (l) (markdown--table-line-to-columns l))
+                           (remq nil lines)))
+            ;; Calculate maximum number of cells in a line
+            (maxcells (if cells
+                          (apply #'max (mapcar #'length cells))
+                        (user-error "Empty table")))
+            ;; Empty cells to fill short lines
+            (emptycells (make-list maxcells ""))
+            maxwidths)
+       ;; Calculate maximum width for each column
+       (dotimes (i maxcells)
+         (let ((column (mapcar (lambda (x) (or (nth i x) "")) cells)))
+           (push (apply #'max 1 (mapcar #'markdown--string-width column))
+                 maxwidths)))
+       (setq maxwidths (nreverse maxwidths))
+       ;; Process column format specifier
+       (setq fmtspec (markdown-table-colfmt fmtspec))
+       ;; Compute formats needed for output of table lines
+       (let ((hfmt (concat indent "|"))
+             (rfmt (concat indent "|"))
+             hfmt1 rfmt1 fmt)
+         (dolist (width maxwidths (setq hfmt (concat (substring hfmt 0 -1) "|")))
+           (setq fmt (pop fmtspec))
+           (cond ((equal fmt 'l) (setq hfmt1 ":%s-|" rfmt1 " %%-%ds |"))
+                 ((equal fmt 'r) (setq hfmt1 "-%s:|" rfmt1  " %%%ds |"))
+                 ((equal fmt 'c) (setq hfmt1 ":%s:|" rfmt1 " %%-%ds |"))
+                 (t              (setq hfmt1 "-%s-|" rfmt1 " %%-%ds |")))
+           (setq rfmt (concat rfmt (format rfmt1 width)))
+           (setq hfmt (concat hfmt (format hfmt1 (make-string width ?-)))))
+         ;; Replace modified lines only
+         (dolist (line lines)
+           (let ((line (if line
+                           (apply #'format rfmt (append (pop cells) emptycells))
+                         hfmt))
+                 (previous (buffer-substring (point) (line-end-position))))
+             (if (equal previous line)
+                 (forward-line)
+               (insert line "\n")
+               (delete-region (point) (line-beginning-position 2))))))
+       (set-marker end nil)))))
+
+(defun markdown-table-insert-row (&optional arg)
+  "Insert a new row above the row at point into the table.
+With optional argument ARG, insert below the current row."
+  (interactive "P")
+  (unless (markdown-table-at-point-p)
+    (user-error "Not at a table"))
+  (let* ((line (buffer-substring
+                (line-beginning-position) (line-end-position)))
+         (new (markdown-table-blank-line line)))
+    (beginning-of-line (if arg 2 1))
+    (unless (bolp) (insert "\n"))
+    (insert-before-markers new "\n")
+    (beginning-of-line 0)
+    (re-search-forward "| ?" (line-end-position) t)))
+
+(defun markdown-table-delete-row ()
+  "Delete row or horizontal line at point from the table."
+  (interactive)
+  (unless (markdown-table-at-point-p)
+    (user-error "Not at a table"))
+  (let ((col (current-column)))
+    (kill-region (line-beginning-position)
+                 (min (1+ (line-end-position)) (point-max)))
+    (unless (markdown-table-at-point-p) (beginning-of-line 0))
+    (move-to-column col)))
+
+(defun markdown-table-move-row (&optional up)
+  "Move table line at point down.
+With optional argument UP, move it up."
+  (interactive "P")
+  (unless (markdown-table-at-point-p)
+    (user-error "Not at a table"))
+  (let* ((col (current-column)) (pos (point))
+         (tonew (if up 0 2)) txt)
+    (beginning-of-line tonew)
+    (unless (markdown-table-at-point-p)
+      (goto-char pos) (user-error "Cannot move row further"))
+    (goto-char pos) (beginning-of-line 1) (setq pos (point))
+    (setq txt (buffer-substring (point) (1+ (line-end-position))))
+    (delete-region (point) (1+ (line-end-position)))
+    (beginning-of-line tonew)
+    (insert txt) (beginning-of-line 0)
+    (move-to-column col)))
+
+(defun markdown-table-move-row-up ()
+  "Move table row at point up."
+  (interactive)
+  (markdown-table-move-row 'up))
+
+(defun markdown-table-move-row-down ()
+  "Move table row at point down."
+  (interactive)
+  (markdown-table-move-row nil))
+
+(defun markdown-table-insert-column ()
+  "Insert a new table column."
+  (interactive)
+  (unless (markdown-table-at-point-p)
+    (user-error "Not at a table"))
+  (let* ((col (max 1 (markdown-table-get-column)))
+         (begin (markdown-table-begin))
+         (end (copy-marker (markdown-table-end))))
+    (markdown-table-save-cell
+     (goto-char begin)
+     (while (< (point) end)
+       (markdown-table-goto-column col t)
+       (if (markdown-table-hline-at-point-p)
+           (insert "|---")
+         (insert "|   "))
+       (forward-line)))
+    (set-marker end nil)
+    (when markdown-table-align-p
+      (markdown-table-align))))
+
+(defun markdown-table-delete-column ()
+  "Delete column at point from table."
+  (interactive)
+  (unless (markdown-table-at-point-p)
+    (user-error "Not at a table"))
+  (let ((col (markdown-table-get-column))
+        (begin (markdown-table-begin))
+        (end (copy-marker (markdown-table-end))))
+    (markdown-table-save-cell
+     (goto-char begin)
+     (while (< (point) end)
+       (markdown-table-goto-column col t)
+       (and (looking-at "|\\(?:\\\\|\\|[^|\n]\\)+|")
+            (replace-match "|"))
+       (forward-line)))
+    (set-marker end nil)
+    (markdown-table-goto-column (max 1 (1- col)))
+    (when markdown-table-align-p
+      (markdown-table-align))))
+
+(defun markdown-table-move-column (&optional left)
+  "Move table column at point to the right.
+With optional argument LEFT, move it to the left."
+  (interactive "P")
+  (unless (markdown-table-at-point-p)
+    (user-error "Not at a table"))
+  (let* ((col (markdown-table-get-column))
+         (col1 (if left (1- col) col))
+         (colpos (if left (1- col) (1+ col)))
+         (begin (markdown-table-begin))
+         (end (copy-marker (markdown-table-end))))
+    (when (and left (= col 1))
+      (user-error "Cannot move column further left"))
+    (when (and (not left) (looking-at "[^|\n]*|[^|\n]*$"))
+      (user-error "Cannot move column further right"))
+    (markdown-table-save-cell
+     (goto-char begin)
+     (while (< (point) end)
+       (markdown-table-goto-column col1 t)
+       (when (looking-at "|\\(\\(?:\\\\|\\|[^|\n]\\|\\)+\\)|\\(\\(?:\\\\|\\|[^|\n]\\|\\)+\\)|")
+         (replace-match "|\\2|\\1|"))
+       (forward-line)))
+    (set-marker end nil)
+    (markdown-table-goto-column colpos)
+    (when markdown-table-align-p
+      (markdown-table-align))))
+
+(defun markdown-table-move-column-left ()
+  "Move table column at point to the left."
+  (interactive)
+  (markdown-table-move-column 'left))
+
+(defun markdown-table-move-column-right ()
+  "Move table column at point to the right."
+  (interactive)
+  (markdown-table-move-column nil))
+
+(defun markdown-table-next-row ()
+  "Go to the next row (same column) in the table.
+Create new table lines if required."
+  (interactive)
+  (unless (markdown-table-at-point-p)
+    (user-error "Not at a table"))
+  (if (or (looking-at "[ \t]*$")
+          (save-excursion (skip-chars-backward " \t") (bolp)))
+      (newline)
+    (when markdown-table-align-p
+      (markdown-table-align))
+    (let ((col (markdown-table-get-column)))
+      (beginning-of-line 2)
+      (if (or (not (markdown-table-at-point-p))
+              (markdown-table-hline-at-point-p))
+          (progn
+            (beginning-of-line 0)
+            (markdown-table-insert-row 'below)))
+      (markdown-table-goto-column col)
+      (skip-chars-backward "^|\n\r")
+      (when (looking-at " ") (forward-char 1)))))
+
+(defun markdown-table-forward-cell ()
+  "Go to the next cell in the table.
+Create new table lines if required."
+  (interactive)
+  (unless (markdown-table-at-point-p)
+    (user-error "Not at a table"))
+  (when markdown-table-align-p
+    (markdown-table-align))
+  (let ((end (markdown-table-end)))
+    (when (markdown-table-hline-at-point-p) (end-of-line 1))
+    (condition-case nil
+        (progn
+          (re-search-forward "\\(?:^\\|[^\\]\\)|" end)
+          (when (looking-at "[ \t]*$")
+            (re-search-forward "\\(?:^\\|[^\\]:\\)|" end))
+          (when (and (looking-at "[-:]")
+                     (re-search-forward "^\\(?:[ \t]*\\|[^\\]\\)|\\([^-:]\\)" end t))
+            (goto-char (match-beginning 1)))
+          (if (looking-at "[-:]")
+              (progn
+                (beginning-of-line 0)
+                (markdown-table-insert-row 'below))
+            (when (looking-at " ") (forward-char 1))))
+      (error (markdown-table-insert-row 'below)))))
+
+(defun markdown-table-backward-cell ()
+  "Go to the previous cell in the table."
+  (interactive)
+  (unless (markdown-table-at-point-p)
+    (user-error "Not at a table"))
+  (when markdown-table-align-p
+    (markdown-table-align))
+  (when (markdown-table-hline-at-point-p) (beginning-of-line 1))
+  (condition-case nil
+      (progn
+        (re-search-backward "\\(?:^\\|[^\\]\\)|" (markdown-table-begin))
+        ;; When this function is called while in the first cell in a
+        ;; table, the point will now be at the beginning of a line. In
+        ;; this case, we need to move past one additional table
+        ;; boundary, the end of the table on the previous line.
+        (when (= (point) (line-beginning-position))
+          (re-search-backward "\\(?:^\\|[^\\]\\)|" (markdown-table-begin)))
+        (re-search-backward "\\(?:^\\|[^\\]\\)|" (markdown-table-begin)))
+    (error (user-error "Cannot move to previous table cell")))
+  (when (looking-at "\\(?:^\\|[^\\]\\)| ?") (goto-char (match-end 0)))
+
+  ;; This may have dropped point on the hline.
+  (when (markdown-table-hline-at-point-p)
+    (markdown-table-backward-cell)))
+
+(defun markdown-table-transpose ()
+  "Transpose table at point.
+Horizontal separator lines will be eliminated."
+  (interactive)
+  (unless (markdown-table-at-point-p)
+    (user-error "Not at a table"))
+  (let* ((table (buffer-substring-no-properties
+                 (markdown-table-begin) (markdown-table-end)))
+         ;; Convert table to Lisp structure
+         (table (delq nil
+                      (mapcar
+                       (lambda (x)
+                         (unless (string-match-p
+                                  markdown-table-hline-regexp x)
+                           (markdown--table-line-to-columns x)))
+                       (markdown--split-string table "[ \t]*\n[ \t]*"))))
+         (dline_old (markdown-table-get-dline))
+         (col_old (markdown-table-get-column))
+         (contents (mapcar (lambda (_)
+                             (let ((tp table))
+                               (mapcar
+                                (lambda (_)
+                                  (prog1
+                                      (pop (car tp))
+                                    (setq tp (cdr tp))))
+                                table)))
+                           (car table))))
+    (goto-char (markdown-table-begin))
+    (save-excursion
+      (re-search-forward "|") (backward-char)
+      (delete-region (point) (markdown-table-end))
+      (insert (mapconcat
+               (lambda(x)
+                 (concat "| " (mapconcat 'identity x " | " ) " |\n"))
+               contents "")))
+    (markdown-table-goto-dline col_old)
+    (markdown-table-goto-column dline_old))
+  (when markdown-table-align-p
+    (markdown-table-align)))
+
+(defun markdown-table-sort-lines (&optional sorting-type)
+  "Sort table lines according to the column at point.
+
+The position of point indicates the column to be used for
+sorting, and the range of lines is the range between the nearest
+horizontal separator lines, or the entire table of no such lines
+exist. If point is before the first column, user will be prompted
+for the sorting column. If there is an active region, the mark
+specifies the first line and the sorting column, while point
+should be in the last line to be included into the sorting.
+
+The command then prompts for the sorting type which can be
+alphabetically or numerically. Sorting in reverse order is also
+possible.
+
+If SORTING-TYPE is specified when this function is called from a
+Lisp program, no prompting will take place. SORTING-TYPE must be
+a character, any of (?a ?A ?n ?N) where the capital letters
+indicate that sorting should be done in reverse order."
+  (interactive)
+  (unless (markdown-table-at-point-p)
+    (user-error "Not at a table"))
+  ;; Set sorting type and column used for sorting
+  (let ((column (let ((c (markdown-table-get-column)))
+                  (cond ((> c 0) c)
+                        ((called-interactively-p 'any)
+                         (read-number "Use column N for sorting: "))
+                        (t 1))))
+        (sorting-type
+         (or sorting-type
+             (progn
+               ;; workaround #641
+               ;; Emacs < 28 hides prompt message by another message. This erases it.
+               (message "")
+               (read-char-exclusive
+                "Sort type: [a]lpha [n]umeric (A/N means reversed): ")))))
+    (save-restriction
+      ;; Narrow buffer to appropriate sorting area
+      (if (region-active-p)
+          (narrow-to-region
+           (save-excursion
+             (progn
+               (goto-char (region-beginning)) (line-beginning-position)))
+           (save-excursion
+             (progn
+               (goto-char (region-end)) (line-end-position))))
+        (let ((start (markdown-table-begin))
+              (end (markdown-table-end)))
+          (narrow-to-region
+           (save-excursion
+             (if (re-search-backward
+                  markdown-table-hline-regexp start t)
+                 (line-beginning-position 2)
+               start))
+           (if (save-excursion (re-search-forward
+                                markdown-table-hline-regexp end t))
+               (match-beginning 0)
+             end))))
+      ;; Determine arguments for `sort-subr'
+      (let* ((extract-key-from-cell
+              (cl-case sorting-type
+                ((?a ?A) #'markdown--remove-invisible-markup) ;; #'identity)
+                ((?n ?N) #'string-to-number)
+                (t (user-error "Invalid sorting type: %c" sorting-type))))
+             (predicate
+              (cl-case sorting-type
+                ((?n ?N) #'<)
+                ((?a ?A) #'string<))))
+        ;; Sort selected area
+        (goto-char (point-min))
+        (sort-subr (memq sorting-type '(?A ?N))
+                   (lambda ()
+                     (forward-line)
+                     (while (and (not (eobp))
+                                 (not (looking-at
+                                       markdown-table-dline-regexp)))
+                       (forward-line)))
+                   #'end-of-line
+                   (lambda ()
+                     (funcall extract-key-from-cell
+                              (markdown-table-get-cell column)))
+                   nil
+                   predicate)
+        (goto-char (point-min))))))
+
+(defun markdown-table-convert-region (begin end &optional separator)
+  "Convert region from BEGIN to END to table with SEPARATOR.
+
+If every line contains at least one TAB character, the function
+assumes that the material is tab separated (TSV). If every line
+contains a comma, comma-separated values (CSV) are assumed. If
+not, lines are split at whitespace into cells.
+
+You can use a prefix argument to force a specific separator:
+\\[universal-argument] once forces CSV, \\[universal-argument]
+twice forces TAB, and \\[universal-argument] three times will
+prompt for a regular expression to match the separator, and a
+numeric argument N indicates that at least N consecutive
+spaces, or alternatively a TAB should be used as the separator."
+
+  (interactive "r\nP")
+  (let* ((begin (min begin end)) (end (max begin end)) re)
+    (goto-char begin) (beginning-of-line 1)
+    (setq begin (point-marker))
+    (goto-char end)
+    (if (bolp) (backward-char 1) (end-of-line 1))
+    (setq end (point-marker))
+    (when (equal separator '(64))
+      (setq separator (read-regexp "Regexp for cell separator: ")))
+    (unless separator
+      ;; Get the right cell separator
+      (goto-char begin)
+      (setq separator
+            (cond
+             ((not (re-search-forward "^[^\n\t]+$" end t)) '(16))
+             ((not (re-search-forward "^[^\n,]+$" end t)) '(4))
+             (t 1))))
+    (goto-char begin)
+    (if (equal separator '(4))
+        ;; Parse CSV
+        (while (< (point) end)
+          (cond
+           ((looking-at "^") (insert "| "))
+           ((looking-at "[ \t]*$") (replace-match " |") (beginning-of-line 2))
+           ((looking-at "[ \t]*\"\\([^\"\n]*\\)\"")
+            (replace-match "\\1") (if (looking-at "\"") (insert "\"")))
+           ((looking-at "[^,\n]+") (goto-char (match-end 0)))
+           ((looking-at "[ \t]*,") (replace-match " | "))
+           (t (beginning-of-line 2))))
+      (setq re
+            (cond
+             ((equal separator '(4))  "^\\|\"?[ \t]*,[ \t]*\"?")
+             ((equal separator '(16)) "^\\|\t")
+             ((integerp separator)
+              (if (< separator 1)
+                  (user-error "Cell separator must contain one or more spaces")
+                (format "^ *\\| *\t *\\| \\{%d,\\}\\|$" separator)))
+             ((stringp separator) (format "^ *\\|%s" separator))
+             (t (error "Invalid cell separator"))))
+      (let (finish)
+        (while (and (not finish) (re-search-forward re end t))
+          (if (eolp)
+              (progn
+                (replace-match "|" t t)
+                (forward-line 1)
+                (when (eobp)
+                  (setq finish t)))
+            (replace-match "| " t t)))))
+    (goto-char begin)
+    (when markdown-table-align-p
+      (markdown-table-align))))
+
+(defun markdown-insert-table (&optional rows columns align)
+  "Insert an empty pipe table.
+Optional arguments ROWS, COLUMNS, and ALIGN specify number of
+rows and columns and the column alignment."
+  (interactive)
+  (let* ((rows (or rows (string-to-number (read-string "Row size: "))))
+         (columns (or columns (string-to-number (read-string "Column size: "))))
+         (align (or align (read-string "Alignment ([l]eft, [r]ight, [c]enter, or RET for default): ")))
+         (align (cond ((equal align "l") ":--")
+                      ((equal align "r") "--:")
+                      ((equal align "c") ":-:")
+                      (t "---")))
+         (pos (point))
+         (indent (make-string (current-column) ?\ ))
+         (line (concat
+                (apply 'concat indent "|"
+                       (make-list columns "   |")) "\n"))
+         (hline (apply 'concat indent "|"
+                       (make-list columns (concat align "|")))))
+    (if (string-match
+         "^[ \t]*$" (buffer-substring-no-properties
+                     (line-beginning-position) (point)))
+        (beginning-of-line 1)
+      (newline))
+    (dotimes (_ rows) (insert line))
+    (goto-char pos)
+    (if (> rows 1)
+        (progn
+          (end-of-line 1) (insert (concat "\n" hline)) (goto-char pos)))
+    (markdown-table-forward-cell)))
+
+
+;;; ElDoc Support =============================================================
+
+(defun markdown-eldoc-function (&rest _ignored)
+  "Return a helpful string when appropriate based on context.
+* Report URL when point is at a hidden URL.
+* Report language name when point is a code block with hidden markup."
+  (cond
+   ;; Hidden URL or reference for inline link
+   ((and (or (thing-at-point-looking-at markdown-regex-link-inline)
+             (thing-at-point-looking-at markdown-regex-link-reference))
+         (or markdown-hide-urls markdown-hide-markup))
+    (let* ((imagep (string-equal (match-string 1) "!"))
+           (referencep (string-equal (match-string 5) "["))
+           (link (match-string-no-properties 6))
+           (edit-keys (markdown--substitute-command-keys
+                       (if imagep
+                           "\\[markdown-insert-image]"
+                         "\\[markdown-insert-link]")))
+           (edit-str (propertize edit-keys 'face 'font-lock-constant-face))
+           (object (if referencep "reference" "URL")))
+      (format "Hidden %s (%s to edit): %s" object edit-str
+              (if referencep
+                  (concat
+                   (propertize "[" 'face 'markdown-markup-face)
+                   (propertize link 'face 'markdown-reference-face)
+                   (propertize "]" 'face 'markdown-markup-face))
+                (propertize link 'face 'markdown-url-face)))))
+   ;; Hidden language name for fenced code blocks
+   ((and (markdown-code-block-at-point-p)
+         (not (get-text-property (point) 'markdown-pre))
+         markdown-hide-markup)
+    (let ((lang (save-excursion (markdown-code-block-lang))))
+      (unless lang (setq lang "[unspecified]"))
+      (format "Hidden code block language: %s (%s to toggle markup)"
+              (propertize lang 'face 'markdown-language-keyword-face)
+              (markdown--substitute-command-keys
+               "\\[markdown-toggle-markup-hiding]"))))))
+
+
+;;; Mode Definition  ==========================================================
+
+(defun markdown-show-version ()
+  "Show the version number in the minibuffer."
+  (interactive)
+  (message "markdown-mode, version %s" markdown-mode-version))
+
+(defun markdown-mode-info ()
+  "Open the `markdown-mode' homepage."
+  (interactive)
+  (browse-url "https://jblevins.org/projects/markdown-mode/"))
+
+;;;###autoload
+(define-derived-mode markdown-mode text-mode "Markdown"
+  "Major mode for editing Markdown files."
+  (when buffer-read-only
+    (when (or (not (buffer-file-name)) (file-writable-p (buffer-file-name)))
+      (setq-local buffer-read-only nil)))
+  ;; Natural Markdown tab width
+  (setq tab-width 4)
+  ;; Comments
+  (setq-local comment-start "<!-- ")
+  (setq-local comment-end " -->")
+  (setq-local comment-start-skip "<!--[ \t]*")
+  (setq-local comment-column 0)
+  (setq-local comment-auto-fill-only-comments nil)
+  (setq-local comment-use-syntax t)
+  ;; Sentence
+  (setq-local sentence-end-base "[.?!…‽][]\"'”’)}»›*_`~]*")
+  ;; Syntax
+  (add-hook 'syntax-propertize-extend-region-functions
+            #'markdown-syntax-propertize-extend-region nil t)
+  (add-hook 'jit-lock-after-change-extend-region-functions
+            #'markdown-font-lock-extend-region-function t t)
+  (setq-local syntax-propertize-function #'markdown-syntax-propertize)
+  (syntax-propertize (point-max)) ;; Propertize before hooks run, etc.
+  ;; Font lock.
+  (setq font-lock-defaults
+        '(markdown-mode-font-lock-keywords
+          nil nil nil nil
+          (font-lock-multiline . t)
+          (font-lock-syntactic-face-function . markdown-syntactic-face)
+          (font-lock-extra-managed-props
+           . (composition display invisible rear-nonsticky
+                          keymap help-echo mouse-face))))
+  (if markdown-hide-markup
+      (add-to-invisibility-spec 'markdown-markup)
+    (remove-from-invisibility-spec 'markdown-markup))
+  ;; Wiki links
+  (markdown-setup-wiki-link-hooks)
+  ;; Math mode
+  (when markdown-enable-math (markdown-toggle-math t))
+  ;; Add a buffer-local hook to reload after file-local variables are read
+  (add-hook 'hack-local-variables-hook #'markdown-handle-local-variables nil t)
+  ;; For imenu support
+  (setq imenu-create-index-function
+        (if markdown-nested-imenu-heading-index
+            #'markdown-imenu-create-nested-index
+          #'markdown-imenu-create-flat-index))
+
+  ;; Defun movement
+  (setq-local beginning-of-defun-function #'markdown-beginning-of-defun)
+  (setq-local end-of-defun-function #'markdown-end-of-defun)
+  ;; Paragraph filling
+  (setq-local fill-paragraph-function #'markdown-fill-paragraph)
+  (setq-local paragraph-start
+              ;; Should match start of lines that start or separate paragraphs
+              (mapconcat #'identity
+                         '(
+                           "\f" ; starts with a literal line-feed
+                           "[ \t\f]*$" ; space-only line
+                           "\\(?:[ \t]*>\\)+[ \t\f]*$"; empty line in blockquote
+                           "[ \t]*[*+-][ \t]+" ; unordered list item
+                           "[ \t]*\\(?:[0-9]+\\|#\\)\\.[ \t]+" ; ordered list item
+                           "[ \t]*\\[\\S-*\\]:[ \t]+" ; link ref def
+                           "[ \t]*:[ \t]+" ; definition
+                           "^|" ; table or Pandoc line block
+                           )
+                         "\\|"))
+  (setq-local paragraph-separate
+              ;; Should match lines that separate paragraphs without being
+              ;; part of any paragraph:
+              (mapconcat #'identity
+                         '("[ \t\f]*$" ; space-only line
+                           "\\(?:[ \t]*>\\)+[ \t\f]*$"; empty line in blockquote
+                           ;; The following is not ideal, but the Fill customization
+                           ;; options really only handle paragraph-starting prefixes,
+                           ;; not paragraph-ending suffixes:
+                           ".*  $" ; line ending in two spaces
+                           "^#+"
+                           "^\\(?:   \\)?[-=]+[ \t]*$" ;; setext
+                           "[ \t]*\\[\\^\\S-*\\]:[ \t]*$") ; just the start of a footnote def
+                         "\\|"))
+  (setq-local adaptive-fill-first-line-regexp "\\`[ \t]*[A-Z]?>[ \t]*?\\'")
+  (setq-local adaptive-fill-regexp "\\s-*")
+  (setq-local adaptive-fill-function #'markdown-adaptive-fill-function)
+  (setq-local fill-forward-paragraph-function #'markdown-fill-forward-paragraph)
+  ;; Outline mode
+  (setq-local outline-regexp markdown-regex-header)
+  (setq-local outline-level #'markdown-outline-level)
+  ;; Cause use of ellipses for invisible text.
+  (add-to-invisibility-spec '(outline . t))
+  ;; ElDoc support
+  (if (boundp 'eldoc-documentation-functions)
+      (add-hook 'eldoc-documentation-functions #'markdown-eldoc-function nil t)
+    (add-function :before-until (local 'eldoc-documentation-function)
+                  #'markdown-eldoc-function))
+  ;; Inhibiting line-breaking:
+  ;; Separating out each condition into a separate function so that users can
+  ;; override if desired (with remove-hook)
+  (add-hook 'fill-nobreak-predicate
+            #'markdown-line-is-reference-definition-p nil t)
+  (add-hook 'fill-nobreak-predicate
+            #'markdown-pipe-at-bol-p nil t)
+
+  ;; Indentation
+  (setq-local indent-line-function markdown-indent-function)
+  (setq-local indent-region-function #'markdown--indent-region)
+
+  ;; Flyspell
+  (setq-local flyspell-generic-check-word-predicate
+              #'markdown-flyspell-check-word-p)
+
+  ;; Electric quoting
+  (add-hook 'electric-quote-inhibit-functions
+            #'markdown--inhibit-electric-quote nil :local)
+
+  ;; Make checkboxes buttons
+  (when markdown-make-gfm-checkboxes-buttons
+    (markdown-make-gfm-checkboxes-buttons (point-min) (point-max))
+    (add-hook 'after-change-functions #'markdown-gfm-checkbox-after-change-function t t)
+    (add-hook 'change-major-mode-hook #'markdown-remove-gfm-checkbox-overlays t t))
+
+  ;; edit-indirect
+  (add-hook 'edit-indirect-after-commit-functions
+            #'markdown--edit-indirect-after-commit-function
+            nil 'local)
+
+  ;; Marginalized headings
+  (when markdown-marginalize-headers
+    (add-hook 'window-configuration-change-hook
+              #'markdown-marginalize-update-current nil t))
+
+  ;; add live preview export hook
+  (add-hook 'after-save-hook #'markdown-live-preview-if-markdown t t)
+  (add-hook 'kill-buffer-hook #'markdown-live-preview-remove-on-kill t t))
+
+;;;###autoload
+(add-to-list 'auto-mode-alist
+             '("\\.\\(?:md\\|markdown\\|mkd\\|mdown\\|mkdn\\|mdwn\\)\\'" . markdown-mode))
+
+
+;;; GitHub Flavored Markdown Mode  ============================================
+
+(defun gfm--electric-pair-fence-code-block ()
+  (when (and electric-pair-mode
+             (not markdown-gfm-use-electric-backquote)
+             (eql last-command-event ?`)
+             (let ((count 0))
+               (while (eql (char-before (- (point) count)) ?`)
+                 (cl-incf count))
+               (= count 3))
+             (eql (char-after) ?`))
+    (save-excursion (insert (make-string 2 ?`)))))
+
+(defvar gfm-mode-hook nil
+  "Hook run when entering GFM mode.")
+
+;;;###autoload
+(define-derived-mode gfm-mode markdown-mode "GFM"
+  "Major mode for editing GitHub Flavored Markdown files."
+  (setq markdown-link-space-sub-char "-")
+  (setq markdown-wiki-link-search-subdirectories t)
+  (setq-local markdown-table-at-point-p-function #'gfm--table-at-point-p)
+  (add-hook 'post-self-insert-hook #'gfm--electric-pair-fence-code-block 'append t)
+  (markdown-gfm-parse-buffer-for-languages))
+
+
+;;; Viewing modes =============================================================
+
+(defcustom markdown-hide-markup-in-view-modes t
+  "Enable hidden markup mode in `markdown-view-mode' and `gfm-view-mode'."
+  :group 'markdown
+  :type 'boolean
+  :safe #'booleanp)
+
+(defvar markdown-view-mode-map
+  (let ((map (make-sparse-keymap)))
+    (define-key map (kbd "p") #'markdown-outline-previous)
+    (define-key map (kbd "n") #'markdown-outline-next)
+    (define-key map (kbd "f") #'markdown-outline-next-same-level)
+    (define-key map (kbd "b") #'markdown-outline-previous-same-level)
+    (define-key map (kbd "u") #'markdown-outline-up)
+    (define-key map (kbd "DEL") #'scroll-down-command)
+    (define-key map (kbd "SPC") #'scroll-up-command)
+    (define-key map (kbd ">") #'end-of-buffer)
+    (define-key map (kbd "<") #'beginning-of-buffer)
+    (define-key map (kbd "q") #'kill-this-buffer)
+    (define-key map (kbd "?") #'describe-mode)
+    map)
+  "Keymap for `markdown-view-mode'.")
+
+(defun markdown--filter-visible (beg end &optional delete)
+  (let ((result "")
+        (invisible-faces '(markdown-header-delimiter-face markdown-header-rule-face)))
+    (while (< beg end)
+      (when (markdown--face-p beg invisible-faces)
+        (cl-incf beg)
+        (while (and (markdown--face-p beg invisible-faces) (< beg end))
+          (cl-incf beg)))
+      (let ((next (next-single-char-property-change beg 'invisible)))
+        (unless (get-char-property beg 'invisible)
+          (setq result (concat result (buffer-substring beg (min end next)))))
+        (setq beg next)))
+    (prog1 result
+      (when delete
+        (let ((inhibit-read-only t))
+          (delete-region beg end))))))
+
+;;;###autoload
+(define-derived-mode markdown-view-mode markdown-mode "Markdown-View"
+  "Major mode for viewing Markdown content."
+  (setq-local markdown-hide-markup markdown-hide-markup-in-view-modes)
+  (add-to-invisibility-spec 'markdown-markup)
+  (setq-local filter-buffer-substring-function #'markdown--filter-visible)
+  (read-only-mode 1))
+
+(defvar gfm-view-mode-map
+  markdown-view-mode-map
+  "Keymap for `gfm-view-mode'.")
+
+;;;###autoload
+(define-derived-mode gfm-view-mode gfm-mode "GFM-View"
+  "Major mode for viewing GitHub Flavored Markdown content."
+  (setq-local markdown-hide-markup markdown-hide-markup-in-view-modes)
+  (setq-local markdown-fontify-code-blocks-natively t)
+  (setq-local filter-buffer-substring-function #'markdown--filter-visible)
+  (add-to-invisibility-spec 'markdown-markup)
+  (read-only-mode 1))
+
+
+;;; Live Preview Mode  ========================================================
+;;;###autoload
+(define-minor-mode markdown-live-preview-mode
+  "Toggle native previewing on save for a specific markdown file."
+  :lighter " MD-Preview"
+  (if markdown-live-preview-mode
+      (if (markdown-live-preview-get-filename)
+          (markdown-display-buffer-other-window (markdown-live-preview-export))
+        (markdown-live-preview-mode -1)
+        (user-error "Buffer %s does not visit a file" (current-buffer)))
+    (markdown-live-preview-remove)))
+
+
+(provide 'markdown-mode)
+
+;; Local Variables:
+;; indent-tabs-mode: nil
+;; coding: utf-8
+;; End:
+;;; markdown-mode.el ends here
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diff --git a/org/elpa/markdown-preview-mode-20210516.936/markdown-preview-mode-autoloads.el b/org/elpa/markdown-preview-mode-20210516.936/markdown-preview-mode-autoloads.el
new file mode 100644
index 0000000..537ba89
--- /dev/null
+++ b/org/elpa/markdown-preview-mode-20210516.936/markdown-preview-mode-autoloads.el
@@ -0,0 +1,54 @@
+;;; markdown-preview-mode-autoloads.el --- automatically extracted autoloads  -*- lexical-binding: t -*-
+;;
+;;; Code:
+
+(add-to-list 'load-path (directory-file-name
+                         (or (file-name-directory #$) (car load-path))))
+
+
+;;;### (autoloads nil "markdown-preview-mode" "markdown-preview-mode.el"
+;;;;;;  (0 0 0 0))
+;;; Generated autoloads from markdown-preview-mode.el
+
+(autoload 'markdown-preview-open-browser "markdown-preview-mode" "\
+Open the `markdown-preview' in the browser." t nil)
+
+(autoload 'markdown-preview-cleanup "markdown-preview-mode" "\
+Cleanup `markdown-preview' mode." t nil)
+
+(autoload 'markdown-preview-mode "markdown-preview-mode" "\
+Markdown preview mode.
+
+This is a minor mode.  If called interactively, toggle the
+`Markdown-Preview mode' mode.  If the prefix argument is
+positive, enable the mode, and if it is zero or negative, disable
+the mode.
+
+If called from Lisp, toggle the mode if ARG is `toggle'.  Enable
+the mode if ARG is nil, omitted, or is a positive number.
+Disable the mode if ARG is a negative number.
+
+To check whether the minor mode is enabled in the current buffer,
+evaluate `markdown-preview-mode'.
+
+The mode's hook is called both when the mode is enabled and when
+it is disabled.
+
+\(fn &optional ARG)" t nil)
+
+(register-definition-prefixes "markdown-preview-mode" '("markdown-preview-"))
+
+;;;***
+
+;;;### (autoloads nil nil ("markdown-preview-mode-pkg.el") (0 0 0
+;;;;;;  0))
+
+;;;***
+
+;; Local Variables:
+;; version-control: never
+;; no-byte-compile: t
+;; no-update-autoloads: t
+;; coding: utf-8
+;; End:
+;;; markdown-preview-mode-autoloads.el ends here
diff --git a/org/elpa/markdown-preview-mode-20210516.936/markdown-preview-mode-pkg.el b/org/elpa/markdown-preview-mode-20210516.936/markdown-preview-mode-pkg.el
new file mode 100644
index 0000000..d5fc4cb
--- /dev/null
+++ b/org/elpa/markdown-preview-mode-20210516.936/markdown-preview-mode-pkg.el
@@ -0,0 +1,16 @@
+(define-package "markdown-preview-mode" "20210516.936" "markdown realtime preview minor mode."
+  '((emacs "24.4")
+    (websocket "1.6")
+    (markdown-mode "2.0")
+    (cl-lib "0.5")
+    (web-server "0.1.1"))
+  :commit "dde87b96de9e81dd01d174da67ef68687b3a5eb5" :authors
+  '(("Igor Shymko" . "igor.shimko@gmail.com"))
+  :maintainer
+  '("Igor Shymko" . "igor.shimko@gmail.com")
+  :keywords
+  '("markdown" "gfm" "convenience")
+  :url "https://github.com/ancane/markdown-preview-mode")
+;; Local Variables:
+;; no-byte-compile: t
+;; End:
diff --git a/org/elpa/markdown-preview-mode-20210516.936/markdown-preview-mode.el b/org/elpa/markdown-preview-mode-20210516.936/markdown-preview-mode.el
new file mode 100644
index 0000000..6fde898
--- /dev/null
+++ b/org/elpa/markdown-preview-mode-20210516.936/markdown-preview-mode.el
@@ -0,0 +1,418 @@
+;;; markdown-preview-mode.el --- markdown realtime preview minor mode.
+
+;; Copyright (C) 2014 <igor.shimko@gmail.com>
+
+;; Author: Igor Shymko <igor.shimko@gmail.com>
+;; URL: https://github.com/ancane/markdown-preview-mode
+;; Keywords: markdown, gfm, convenience
+;; Version: 0.9.4
+;; Package-Requires: ((emacs "24.4") (websocket "1.6") (markdown-mode "2.0") (cl-lib "0.5") (web-server "0.1.1") )
+
+;; This file is not part of GNU Emacs.
+
+;; This program is free software; you can redistribute it and/or modify
+;; it under the terms of the GNU General Public License as published by
+;; the Free Software Foundation; either version 3, or (at your option)
+;; any later version.
+;;
+;; This program is distributed in the hope that it will be useful,
+;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+;; GNU General Public License for more details.
+;;
+;; You should have received a copy of the GNU General Public License
+;; along with GNU Emacs.  If not, see <https://www.gnu.org/licenses/>.
+
+;;; Commentary:
+;;
+;; This package makes use of websockets to deliver rendered markdown to a web browser.
+;; Updates happen upon buffer save or on idle.
+;;
+;;; Code:
+
+(eval-when-compile (require 'cl))
+(require 'cl-lib)
+(require 'websocket)
+(require 'markdown-mode)
+(require 'web-server)
+
+(defgroup markdown-preview nil
+  "Markdown preview mode."
+  :group 'text
+  :prefix "markdown-preview-"
+  :link '(url-link "https://github.com/ancane/markdown-preview-mode"))
+
+(defcustom markdown-preview-host "localhost"
+  "Markdown preview websocket server address."
+  :group 'markdown-preview
+  :type 'string)
+
+(defcustom markdown-preview-ws-port 7379
+  "Markdown preview websocket server port."
+  :group 'markdown-preview
+  :type 'integer)
+
+(defcustom markdown-preview-http-host "localhost"
+  "Markdown preview http server address."
+  :group 'markdown-preview
+  :type 'string)
+
+(defcustom markdown-preview-http-port 9000
+  "Markdown preview http server port."
+  :group 'markdown-preview
+  :type 'integer)
+
+(defcustom markdown-preview-style nil
+  "Deprecated. Use `markdown-preview-stylesheets'."
+  :group 'markdown-preview
+  :type 'string)
+
+(defcustom markdown-preview-file-name ".markdown-preview.html"
+  "Markdown preview file name."
+  :group 'markdown-preview
+  :type 'string)
+
+(defcustom markdown-preview-auto-open 'http
+  "Markdown preview websocket server address."
+  :group 'markdown-preview
+  :type '(choice (const :tag "As local file" file)
+                 (const :tag "Via http" http)
+                 (const :tag "Off" nil)))
+
+(defcustom markdown-preview-delay-time 2.0
+  "Refresh preview after this certain of time."
+  :group 'markdown-preview
+  :type 'float)
+
+(defvar markdown-preview-javascript '()
+  "List of client javascript libs for preview.")
+
+(defvar markdown-preview-stylesheets
+  (list "https://thomasf.github.io/solarized-css/solarized-dark.min.css")
+  "List of client stylesheets for preview.")
+
+(defvar markdown-preview--websocket-server nil
+  "`markdown-preview' Websocket server.")
+
+(defvar markdown-preview--http-server nil
+  "`markdown-preview' http server.")
+
+(defvar markdown-preview--local-client nil
+  "`markdown-preview' local client.")
+
+(defvar markdown-preview--remote-clients (make-hash-table :test 'equal)
+  "Remote clients hashtable. UUID -> WS.")
+
+(defvar markdown-preview--home-dir (file-name-directory load-file-name)
+  "`markdown-preview-mode' home directory.")
+
+(defvar markdown-preview--preview-template
+  (expand-file-name "preview.html" markdown-preview--home-dir)
+  "`markdown-preview-mode' html preview template.")
+
+(defvar markdown-preview--idle-timer nil
+  "Preview idle timer.")
+
+(defvar markdown-preview--uuid nil
+  "Unique preview identifier.")
+
+(defvar markdown-preview--preview-buffers (make-hash-table :test 'equal)
+  "Preview buffers hashtable. UUID -> buffer name.")
+
+(defun markdown-preview--stop-idle-timer ()
+  "Stop the `markdown-preview' idle timer."
+  (when (timerp markdown-preview--idle-timer)
+    (cancel-timer markdown-preview--idle-timer)))
+
+(defun markdown-preview--css ()
+  "Get list of styles for preview in backward compatible way."
+  (let* ((custom-style (list markdown-preview-style))
+         (all-styles
+          (mapc (lambda (x) (add-to-list 'custom-style x t)) markdown-preview-stylesheets)))
+    (mapconcat
+     (lambda (x)
+       (if (string-match-p "^[\n\t ]*<style" x)
+           x
+         (concat "<link rel=\"stylesheet\" type=\"text/css\" href=\"" x "\">")))
+     all-styles
+     "\n")))
+
+(defun markdown-preview--scripts ()
+  "Get list of javascript script tags for preview."
+  (mapconcat
+   (lambda (x)
+     (if (string-match-p "^[\n\t ]*<script" x)
+         x
+       (concat
+        "<script src=\"" (if (consp x) (car x) x) "\""
+        (if (consp x) (format " %s" (cdr x)))
+        "></script>")))
+   markdown-preview-javascript
+   "\n"))
+
+(defun markdown-preview--read-preview-template (preview-uuid preview-file)
+  "Read preview template and writes identified by PREVIEW-UUID rendered copy to PREVIEW-FILE, ready to be open in browser."
+  (with-temp-file preview-file
+    (insert-file-contents markdown-preview--preview-template)
+    (when (search-forward "${MD_STYLE}" nil t)
+      (replace-match (markdown-preview--css) t))
+    (when (search-forward "${MD_JS}" nil t)
+      (replace-match (markdown-preview--scripts) t))
+    (when (search-forward "${WS_HOST}" nil t)
+      (replace-match markdown-preview-host t))
+    (when (search-forward "${WS_PORT}" nil t)
+      (replace-match (format "%s" markdown-preview-ws-port) t))
+    (when (search-forward "${MD_UUID}" nil t)
+      (replace-match (format "%s" preview-uuid) t))
+    (buffer-string)))
+
+;; Emacs 26 async network workaround
+(defun markdown-preview--fix-network-process-wait (plist)
+  "Ensure PLIST contain :nowait nil."
+  (if (and (>= emacs-major-version 26)
+           (equal (plist-get plist :name) "ws-server")
+           (plist-get plist :server)
+           (plist-get plist :nowait))
+      (plist-put plist :nowait nil)
+    plist))
+
+(defun markdown-preview--start-http-server (port)
+  "Start http server at PORT to serve preview file via http."
+  (unless markdown-preview--http-server
+    (lexical-let ((docroot default-directory))
+      (advice-add 'make-network-process :filter-args #'markdown-preview--fix-network-process-wait)
+      (setq markdown-preview--http-server
+            (ws-start
+             (lambda (request)
+               (with-slots (process headers) request
+                 (let* ((path (substring (cdr (assoc :GET headers)) 1))
+                        (filename (expand-file-name path docroot)))
+                   (if (string= path "")
+                       (progn
+                         (ws-send-file
+                          process
+                          (expand-file-name
+                           markdown-preview-file-name
+                           (with-current-buffer
+                               (gethash (markdown-preview--parse-uuid headers)
+                                        markdown-preview--preview-buffers)
+                             default-directory
+                             ))))
+                     (if (string= path "favicon.ico")
+                         (ws-send-file process (expand-file-name path markdown-preview--home-dir))
+                       (if (and (not (file-directory-p filename)) (file-exists-p filename))
+                           (ws-send-file process filename)
+                         (ws-send-404 process)
+                         ))))))
+             markdown-preview-http-port nil :host markdown-preview-http-host))
+      (advice-remove 'make-network-process #'markdown-preview--fix-network-process-wait))))
+
+(defun markdown-preview--parse-uuid (headers)
+  "Find uuid query param in HEADERS."
+  (let ((found (cl-find-if (lambda (x)
+                             (when (stringp (car x))
+                               (equal "uuid" (format "%s" (car x)))))
+                           headers)))
+    (when found (cdr found))))
+
+
+(defun markdown-preview--open-browser-preview ()
+  "Open the markdown preview in the browser."
+  (when (eq markdown-preview-auto-open 'file)
+    (browse-url (expand-file-name markdown-preview-file-name default-directory)))
+  (when (eq markdown-preview-auto-open 'http)
+    (browse-url
+     (format "http://localhost:%d/?uuid=%s" markdown-preview-http-port markdown-preview--uuid)))
+  (unless markdown-preview-auto-open
+    (message
+     (format
+      "Preview address: http://0.0.0.0:%d/?uuid=%s"
+      markdown-preview-http-port
+      markdown-preview--uuid))))
+
+(defun markdown-preview--stop-websocket-server ()
+  "Stop the `markdown-preview' websocket server."
+  (clrhash markdown-preview--preview-buffers)
+  (when markdown-preview--local-client
+    (websocket-close markdown-preview--local-client))
+  (when markdown-preview--websocket-server
+    (delete-process markdown-preview--websocket-server)
+    (setq markdown-preview--websocket-server nil)
+    (clrhash markdown-preview--remote-clients)))
+
+(defun markdown-preview--stop-http-server ()
+  "Stop the `markdown-preview' http server."
+  (when markdown-preview--http-server
+    (ws-stop markdown-preview--http-server)
+    (setq markdown-preview--http-server nil)))
+
+(defun markdown-preview--drop-closed-clients ()
+  "Clean closed clients in `markdown-preview--remote-clients' list."
+  (maphash (lambda (ws-uuid websocket)
+             (unless (websocket-openp websocket))
+             (remhash ws-uuid markdown-preview--remote-clients))
+           markdown-preview--remote-clients))
+
+(defun markdown-preview--start-websocket-server ()
+  "Start `markdown-preview' websocket server."
+  (when (not markdown-preview--websocket-server)
+    (setq markdown-preview--websocket-server
+          (websocket-server
+           markdown-preview-ws-port
+           :host markdown-preview-host
+           :on-message (lambda (websocket frame)
+                         (let ((ws-frame-text (websocket-frame-payload frame)))
+                           (if (and
+                                (stringp ws-frame-text)
+                                (string-prefix-p "MDPM-Register-UUID: " ws-frame-text))
+                               (let ((ws-uuid (substring ws-frame-text 20)))
+                                 (puthash ws-uuid websocket markdown-preview--remote-clients)
+                                 (markdown-preview--send-preview-to websocket ws-uuid))
+                             (progn
+                               (websocket-send
+                                (gethash markdown-preview--uuid markdown-preview--remote-clients)
+                                frame))
+                             )))
+           :on-open (lambda (websocket) (message "Websocket opened"))
+           :on-error (lambda (websocket type err) (message (format "====> Error: %s" err)))
+           :on-close (lambda (websocket) (markdown-preview--drop-closed-clients))))
+    (add-hook 'kill-emacs-hook 'markdown-preview--stop-websocket-server))
+  (markdown-preview--open-browser-preview))
+
+(defun markdown-preview--start-local-client ()
+  "Start the `markdown-preview' local client."
+  (when (not markdown-preview--local-client)
+    (setq markdown-preview--local-client
+          (websocket-open
+           (format "ws://%s:%d" markdown-preview-host markdown-preview-ws-port)
+           :on-error (lambda (ws type err)
+                       (message "error connecting"))
+           :on-close (lambda (websocket)
+                       (setq markdown-preview--local-client nil))))))
+
+(defun markdown-preview--send-preview (preview-uuid)
+  "Send the `markdown-preview' with PREVIEW-UUID preview to clients."
+  (when (bound-and-true-p markdown-preview-mode)
+    (markdown-preview--send-preview-to markdown-preview--local-client preview-uuid)))
+
+(defun markdown-preview--send-preview-to (websocket preview-uuid)
+  "Send the `markdown-preview' with PREVIEW-UUID to a specific WEBSOCKET."
+  (let ((mark-position-percent
+         (number-to-string
+          (truncate
+           (* 100
+              (/
+               (float (-  (line-number-at-pos) (/ (count-screen-lines (window-start) (point)) 2)))
+               (count-lines (point-min) (point-max))))))))
+
+    (let ((md-buffer (gethash preview-uuid markdown-preview--preview-buffers)))
+      (when md-buffer
+        (with-current-buffer md-buffer
+
+          (markdown markdown-output-buffer-name))))
+
+    (with-current-buffer markdown-output-buffer-name ;; get-buffer
+      (websocket-send-text websocket
+                           (concat
+                            "<div>"
+                            "<span id='position-percentage'>"
+                            mark-position-percent
+                            "</span>"
+                            "<div id='content'>"
+                            (buffer-substring-no-properties (point-min) (point-max))
+                            "</div>"
+                            "</div>")
+                           ))))
+
+(defun markdown-preview--start ()
+  "Start `markdown-preview' mode."
+  (setq-local markdown-preview--uuid (markdown-preview--random-uuid))
+  (puthash markdown-preview--uuid (buffer-name) markdown-preview--preview-buffers)
+  ;;  (gethash markdown-preview--uuid markdown-preview--preview-buffers)
+  (markdown-preview--read-preview-template
+   markdown-preview--uuid
+   (expand-file-name markdown-preview-file-name default-directory))
+  (markdown-preview--start-websocket-server)
+  (markdown-preview--start-local-client)
+  (markdown-preview--start-http-server markdown-preview-http-port)
+  (setq markdown-preview--idle-timer
+        (run-with-idle-timer markdown-preview-delay-time t
+                             (lambda ()
+                               (when markdown-preview--uuid
+                                 (markdown-preview--send-preview markdown-preview--uuid)))))
+  (add-hook 'after-save-hook (lambda ()
+                               (when markdown-preview--uuid
+                                 (markdown-preview--send-preview markdown-preview--uuid))) nil t))
+
+(defun markdown-preview--stop ()
+  "Stop `markdown-preview' mode."
+  (remove-hook 'after-save-hook 'markdown-preview--send-preview t)
+  (markdown-preview--stop-idle-timer)
+  (remhash markdown-preview--uuid markdown-preview--preview-buffers)
+  (let* ((preview-file-dir (if (buffer-file-name)
+                               (file-name-directory (buffer-file-name))
+                             default-directory))
+         (preview-file (concat preview-file-dir markdown-preview-file-name)))
+    (if (file-exists-p preview-file)
+        (delete-file preview-file))))
+
+(defun markdown-preview--random-uuid ()
+  "Insert a UUID using a simple hashing of variable data.
+Example of a UUID: 1df63142-a513-c850-31a3-535fc3520c3d
+Note: this code uses https://en.wikipedia.org/wiki/Md5,
+which is not cryptographically safe. I'm not sure what's
+the implication of its use here.
+Version 2015-01-30
+URL `http://ergoemacs.org/emacs/elisp_generate_uuid.html'"
+  ;; by Christopher Wellons, 2011-11-18. Editted by Xah Lee.
+  ;; Edited by Hideki Saito further to generate all valid variants for "N" in xxxxxxxx-xxxx-Mxxx-Nxxx-xxxxxxxxxxxx format.
+  ;; (interactive)
+  (let ((myStr (md5 (format "%s%s%s%s%s%s%s%s%s%s"
+                            (user-uid)
+                            (emacs-pid)
+                            (system-name)
+                            (user-full-name)
+                            (current-time)
+                            (emacs-uptime)
+                            (garbage-collect)
+                            (buffer-string)
+                            (random)
+                            (recent-keys)))))
+
+    (format "%s-%s-4%s-%s%s-%s"
+            (substring myStr 0 8)
+            (substring myStr 8 12)
+            (substring myStr 13 16)
+            (format "%x" (+ 8 (random 4)))
+            (substring myStr 17 20)
+            (substring myStr 20 32))))
+
+;;;###autoload
+(defun markdown-preview-open-browser ()
+  "Open the `markdown-preview' in the browser."
+  (interactive)
+  (markdown-preview--open-browser-preview))
+
+;;;###autoload
+(defun markdown-preview-cleanup ()
+  "Cleanup `markdown-preview' mode."
+  (interactive)
+  (markdown-preview--stop-websocket-server)
+  (markdown-preview--stop-http-server))
+
+;;;###autoload
+(define-minor-mode markdown-preview-mode
+  "Markdown preview mode."
+  :group 'markdown-preview
+  :init-value nil
+  (when (not (or
+              (equal major-mode 'markdown-mode)
+              (equal major-mode 'gfm-mode)))
+    (markdown-mode))
+  (if markdown-preview-mode
+      (markdown-preview--start)
+    (markdown-preview--stop)))
+
+(provide 'markdown-preview-mode)
+
+;;; markdown-preview-mode.el ends here
diff --git a/org/elpa/markdown-preview-mode-20210516.936/preview.html b/org/elpa/markdown-preview-mode-20210516.936/preview.html
new file mode 100644
index 0000000..4ba0bef
--- /dev/null
+++ b/org/elpa/markdown-preview-mode-20210516.936/preview.html
@@ -0,0 +1,41 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <meta charset="utf-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1, minimal-ui">
+    <title>Markdown preview</title>
+    ${MD_STYLE}
+    <script src="http://code.jquery.com/jquery-1.12.4.min.js"></script>
+    ${MD_JS}
+    <script>
+     (function($, undefined) {
+         var socket = new WebSocket("ws://${WS_HOST}:${WS_PORT}");
+         socket.onopen = function() {
+             console.log("Connection established.");
+	     socket.send("MDPM-Register-UUID: ${MD_UUID}");
+         };
+         socket.onclose = function(event) {
+             if (event.wasClean) {
+                 console.log('Connection closed gracefully.');
+             } else {
+                 console.log('Connection terminated.');
+             }
+             console.log('Code: ' + event.code + ' reason: ' + event.reason);
+         };
+         socket.onmessage = function(event) {
+             $("#markdown-body").html($(event.data).find("#content").html()).trigger('mdContentChange');
+             var scroll = $(document).height() * ($(event.data).find("#position-percentage").html() / 100);
+             $("html, body").animate({ scrollTop: scroll }, 600);
+         };
+         socket.onerror = function(error) {
+             console.log("Error: " + error.message);
+         };
+     })(jQuery);
+    </script>
+  </head>
+  <body>
+    <article id="markdown-body" class="markdown-body">
+      <p>Markdown preview</p>
+    </article>
+  </body>
+</html>
diff --git a/org/elpa/rainbow-delimiters-20210515.1254/rainbow-delimiters-autoloads.el b/org/elpa/rainbow-delimiters-20210515.1254/rainbow-delimiters-autoloads.el
new file mode 100644
index 0000000..9876f5d
--- /dev/null
+++ b/org/elpa/rainbow-delimiters-20210515.1254/rainbow-delimiters-autoloads.el
@@ -0,0 +1,49 @@
+;;; rainbow-delimiters-autoloads.el --- automatically extracted autoloads  -*- lexical-binding: t -*-
+;;
+;;; Code:
+
+(add-to-list 'load-path (directory-file-name
+                         (or (file-name-directory #$) (car load-path))))
+
+
+;;;### (autoloads nil "rainbow-delimiters" "rainbow-delimiters.el"
+;;;;;;  (0 0 0 0))
+;;; Generated autoloads from rainbow-delimiters.el
+
+(autoload 'rainbow-delimiters-mode "rainbow-delimiters" "\
+Highlight nested parentheses, brackets, and braces according to their depth.
+
+This is a minor mode.  If called interactively, toggle the
+`Rainbow-Delimiters mode' mode.  If the prefix argument is
+positive, enable the mode, and if it is zero or negative, disable
+the mode.
+
+If called from Lisp, toggle the mode if ARG is `toggle'.  Enable
+the mode if ARG is nil, omitted, or is a positive number.
+Disable the mode if ARG is a negative number.
+
+To check whether the minor mode is enabled in the current buffer,
+evaluate `rainbow-delimiters-mode'.
+
+The mode's hook is called both when the mode is enabled and when
+it is disabled.
+
+\(fn &optional ARG)" t nil)
+
+(autoload 'rainbow-delimiters-mode-enable "rainbow-delimiters" "\
+Enable `rainbow-delimiters-mode'." nil nil)
+
+(autoload 'rainbow-delimiters-mode-disable "rainbow-delimiters" "\
+Disable `rainbow-delimiters-mode'." nil nil)
+
+(register-definition-prefixes "rainbow-delimiters" '("rainbow-delimiters-"))
+
+;;;***
+
+;; Local Variables:
+;; version-control: never
+;; no-byte-compile: t
+;; no-update-autoloads: t
+;; coding: utf-8
+;; End:
+;;; rainbow-delimiters-autoloads.el ends here
diff --git a/org/elpa/rainbow-delimiters-20210515.1254/rainbow-delimiters-pkg.el b/org/elpa/rainbow-delimiters-20210515.1254/rainbow-delimiters-pkg.el
new file mode 100644
index 0000000..16679fe
--- /dev/null
+++ b/org/elpa/rainbow-delimiters-20210515.1254/rainbow-delimiters-pkg.el
@@ -0,0 +1,2 @@
+;;; Generated package description from rainbow-delimiters.el  -*- no-byte-compile: t -*-
+(define-package "rainbow-delimiters" "20210515.1254" "Highlight brackets according to their depth" 'nil :commit "7919681b0d883502155d5b26e791fec15da6aeca" :authors '(("Jeremy Rayman" . "opensource@jeremyrayman.com") ("Fanael Linithien" . "fanael4@gmail.com")) :maintainer '("Fanael Linithien" . "fanael4@gmail.com") :keywords '("faces" "convenience" "lisp" "tools") :url "https://github.com/Fanael/rainbow-delimiters")
diff --git a/org/elpa/rainbow-delimiters-20210515.1254/rainbow-delimiters.el b/org/elpa/rainbow-delimiters-20210515.1254/rainbow-delimiters.el
new file mode 100644
index 0000000..aff69db
--- /dev/null
+++ b/org/elpa/rainbow-delimiters-20210515.1254/rainbow-delimiters.el
@@ -0,0 +1,311 @@
+;;; rainbow-delimiters.el --- Highlight brackets according to their depth -*- lexical-binding: t -*-
+
+;; Copyright (C)
+;;   2010-2013 Jeremy Rayman
+;;   2013-2021 Fanael Linithien
+;; Author: Jeremy Rayman <opensource@jeremyrayman.com>
+;;         Fanael Linithien <fanael4@gmail.com>
+;; Maintainer: Fanael Linithien <fanael4@gmail.com>
+;; Created: 2010-09-02
+;; Version: 2.1.5
+;; Package-Version: 20210515.1254
+;; Package-Commit: 7919681b0d883502155d5b26e791fec15da6aeca
+;; Keywords: faces, convenience, lisp, tools
+;; Homepage: https://github.com/Fanael/rainbow-delimiters
+
+;; Note: despite `lexical-binding', there's no Emacs 24 dependency.
+;; This is merely an optimization for Emacs 24+, the code is supposed to work
+;; with *both* dynamic and lexical binding.
+
+;; This program is free software; you can redistribute it and/or modify
+;; it under the terms of the GNU General Public License as published by
+;; the Free Software Foundation, either version 3 of the License, or
+;; (at your option) any later version.
+
+;; This program is distributed in the hope that it will be useful,
+;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+;; GNU General Public License for more details.
+
+;; You should have received a copy of the GNU General Public License
+;; along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+;;; Installation:
+
+;; The recommended way is to use MELPA (http://melpa.org/) or MELPA Stable
+;; (http://stable.melpa.org/). If either is in your `package-archives', do
+;;   M-x package-install RET rainbow-delimiters RET
+;; Otherwise, open `rainbow-delimiters.el' in Emacs and use
+;;   M-x package-install-from-buffer
+;; Any other methods of installation are unsupported.
+
+;;; Commentary:
+;;
+;; Rainbow-delimiters is a "rainbow parentheses"-like mode which highlights
+;; parentheses, brackets, and braces according to their depth. Each
+;; successive level is highlighted in a different color. This makes it easy
+;; to spot matching delimiters, orient yourself in the code, and tell which
+;; statements are at a given level.
+;;
+;; Great care has been taken to make this mode fast. You shouldn't see
+;; any discernible change in scrolling or editing speed while using it,
+;; even in delimiter-rich languages like Clojure, Lisp, and Scheme.
+;;
+;; Usage:
+;;
+;; To toggle the mode in the current buffer:
+;;   M-x rainbow-delimiters-mode
+;; To start the mode automatically in `foo-mode', add the following to your init
+;; file:
+;;   (add-hook 'foo-mode-hook #'rainbow-delimiters-mode)
+;; To start the mode automatically in most programming modes (Emacs 24 and
+;; above):
+;;   (add-hook 'prog-mode-hook #'rainbow-delimiters-mode)
+;;
+;; Customization:
+;;
+;; To customize various options, including the color theme:
+;;   M-x customize-group rainbow-delimiters
+;;
+;; You can specify custom colors by customizing following faces:
+;; - Faces take the form `rainbow-delimiters-depth-N-face', with N being the
+;;   depth. Depth begins at 1, the outermost color. Faces exist for depths 1-9.
+;; - The unmatched delimiter face: `rainbow-delimiters-unmatched-face'.
+;; - The mismatched delimiter face: `rainbow-delimiters-mismatched-face'.
+
+;;; Code:
+
+(defgroup rainbow-delimiters nil
+  "Highlight nested parentheses, brackets, and braces according to their depth."
+  :prefix "rainbow-delimiters-"
+  :link '(url-link :tag "Website for rainbow-delimiters"
+                   "https://github.com/Fanael/rainbow-delimiters")
+  :group 'applications)
+
+(defgroup rainbow-delimiters-faces nil
+  "Faces for successively nested pairs of delimiters.
+
+When depth exceeds innermost defined face, colors cycle back through."
+  :group 'rainbow-delimiters
+  :group 'faces
+  :link '(custom-group-link "rainbow-delimiters")
+  :prefix "rainbow-delimiters-")
+
+(defcustom rainbow-delimiters-pick-face-function
+  #'rainbow-delimiters-default-pick-face
+  "The function used to pick a face used to highlight a delimiter.
+The function should take three arguments (DEPTH MATCH LOC), where:
+  - DEPTH is the delimiter depth; when zero or negative, it's an unmatched
+    delimiter.
+  - MATCH is nil iff the delimiter is a mismatched closing delimiter.
+  - LOC is the location of the delimiter.
+The function should return a value suitable to use as a value of the `face' text
+property, or nil, in which case the delimiter is not highlighted.
+The function should not move the point or mark or change the match data."
+  :tag "Pick face function"
+  :type 'function
+  :group 'rainbow-delimiters)
+
+(defface rainbow-delimiters-base-face
+  '((default (:inherit unspecified)))
+  "Face inherited by all other rainbow-delimiter faces."
+  :group 'rainbow-delimiters-faces)
+
+(defface rainbow-delimiters-base-error-face
+  '((default (:inherit rainbow-delimiters-base-face))
+    (t (:foreground "#88090B")))
+  "Face inherited by all other rainbow-delimiter error faces."
+  :group 'rainbow-delimiters-faces)
+
+(defface rainbow-delimiters-unmatched-face
+  '((default (:inherit rainbow-delimiters-base-error-face)))
+  "Face to highlight unmatched closing delimiters in."
+  :group 'rainbow-delimiters-faces)
+
+(defface rainbow-delimiters-mismatched-face
+  '((default (:inherit rainbow-delimiters-unmatched-face)))
+  "Face to highlight mismatched closing delimiters in."
+  :group 'rainbow-delimiters-faces)
+
+(eval-when-compile
+  (defmacro rainbow-delimiters--define-depth-faces ()
+    (let ((faces '())
+          (light-colors ["#707183" "#7388d6" "#909183" "#709870" "#907373"
+                         "#6276ba" "#858580" "#80a880" "#887070"])
+          (dark-colors ["grey55" "#93a8c6" "#b0b1a3" "#97b098" "#aebed8"
+                        "#b0b0b3" "#90a890" "#a2b6da" "#9cb6ad"]))
+      (dotimes (i 9)
+        (push `(defface ,(intern (format "rainbow-delimiters-depth-%d-face" (1+ i)))
+                 '((default (:inherit rainbow-delimiters-base-face))
+                   (((class color) (background light)) :foreground ,(aref light-colors i))
+                   (((class color) (background dark)) :foreground ,(aref dark-colors i)))
+                 ,(format "Nested delimiter face, depth %d." (1+ i))
+                 :group 'rainbow-delimiters-faces)
+              faces))
+      `(progn ,@faces))))
+(rainbow-delimiters--define-depth-faces)
+
+(defcustom rainbow-delimiters-max-face-count 9
+  "Number of faces defined for highlighting delimiter levels.
+
+Determines depth at which to cycle through faces again.
+
+It's safe to change this variable provided that for all integers from 1 to the
+new value inclusive, a face `rainbow-delimiters-depth-N-face' is defined."
+  :type 'integer
+  :group 'rainbow-delimiters)
+
+(defcustom rainbow-delimiters-outermost-only-face-count 0
+  "Number of faces to be used only for N outermost delimiter levels.
+
+This should be smaller than `rainbow-delimiters-max-face-count'."
+  :type 'integer
+  :group 'rainbow-delimiters)
+
+
+(defun rainbow-delimiters-default-pick-face (depth match _loc)
+  "Return a face name appropriate for nesting depth DEPTH.
+DEPTH and MATCH are as in `rainbow-delimiters-pick-face-function'.
+
+The returned value is either `rainbow-delimiters-unmatched-face',
+`rainbow-delimiters-mismatched-face', or one of the
+`rainbow-delimiters-depth-N-face' faces, obeying
+`rainbow-delimiters-max-face-count' and
+`rainbow-delimiters-outermost-only-face-count'."
+  (cond
+   ((<= depth 0)
+    'rainbow-delimiters-unmatched-face)
+   ((not match)
+    'rainbow-delimiters-mismatched-face)
+   (t
+    (intern-soft
+     (concat "rainbow-delimiters-depth-"
+             (number-to-string
+              (if (<= depth rainbow-delimiters-max-face-count)
+                  ;; Our nesting depth has a face defined for it.
+                  depth
+                ;; Deeper than # of defined faces; cycle back through to
+                ;; `rainbow-delimiters-outermost-only-face-count' + 1.
+                ;; Return face # that corresponds to current nesting level.
+                (+ 1 rainbow-delimiters-outermost-only-face-count
+                   (mod (- depth rainbow-delimiters-max-face-count 1)
+                        (- rainbow-delimiters-max-face-count
+                           rainbow-delimiters-outermost-only-face-count)))))
+             "-face")))))
+
+(defun rainbow-delimiters--apply-color (loc depth match)
+  "Highlight a single delimiter at LOC according to DEPTH.
+
+LOC is the location of the character to add text properties to.
+DEPTH is the nested depth at LOC, which determines the face to use.
+MATCH is nil iff it's a mismatched closing delimiter."
+  (let ((face (funcall rainbow-delimiters-pick-face-function depth match loc)))
+    (when face
+      (font-lock-prepend-text-property loc (1+ loc) 'face face))))
+
+(defun rainbow-delimiters--char-ineligible-p (loc ppss delim-syntax-code)
+  "Return t if char at LOC should not be highlighted.
+PPSS is the `parse-partial-sexp' state at LOC.
+DELIM-SYNTAX-CODE is the `car' of a raw syntax descriptor at LOC.
+
+Returns t if char at loc meets one of the following conditions:
+- Inside a string.
+- Inside a comment.
+- Is an escaped char, e.g. ?\)"
+  (or
+   (nth 3 ppss)                ; inside string?
+   (nth 4 ppss)                ; inside comment?
+   (nth 5 ppss)                ; escaped according to the syntax table?
+   ;; Note: no need to consider single-char openers, they're already handled
+   ;; by looking at ppss.
+   (cond
+    ;; Two character opener, LOC at the first character?
+    ((/= 0 (logand #x10000 delim-syntax-code))
+     (/= 0 (logand #x20000 (or (car (syntax-after (1+ loc))) 0))))
+    ;; Two character opener, LOC at the second character?
+    ((/= 0 (logand #x20000 delim-syntax-code))
+     (/= 0 (logand #x10000 (or (car (syntax-after (1- loc))) 0))))
+    (t
+     nil))))
+
+;; Main function called by font-lock.
+(defun rainbow-delimiters--propertize (end)
+  "Highlight delimiters in region between point and END.
+
+Used by font-lock for dynamic highlighting."
+  (when (bound-and-true-p mmm-current-submode)
+    ;; `mmm-mode' is weird and apparently needs this hack, because otherwise we
+    ;; may end up thinking matched parentheses are mismatched.
+    (widen))
+  (let* ((last-ppss-pos (point))
+         (ppss (syntax-ppss)))
+    (while (> end (progn (skip-syntax-forward "^()" end)
+                         (point)))
+      (let* ((delim-pos (point))
+             (delim-syntax (syntax-after delim-pos)))
+        (setq ppss (parse-partial-sexp last-ppss-pos delim-pos nil nil ppss))
+        (setq last-ppss-pos delim-pos)
+        ;; `skip-syntax-forward' leaves the point at the delimiter, move past
+        ;; it.
+        (forward-char)
+        (let ((delim-syntax-code (car delim-syntax)))
+          (cond
+           ((rainbow-delimiters--char-ineligible-p delim-pos ppss delim-syntax-code)
+            nil)
+           ((= 4 (logand #xFFFF delim-syntax-code))
+            ;; The (1+ ...) is needed because `parse-partial-sexp' returns the
+            ;; depth at the opening delimiter, not in the block being started.
+            (rainbow-delimiters--apply-color delim-pos (1+ (nth 0 ppss)) t))
+           (t
+            ;; Not an opening delimiter, so it's a closing delimiter.
+            (let ((matches-p (eq (cdr delim-syntax) (char-after (nth 1 ppss)))))
+              (rainbow-delimiters--apply-color delim-pos (nth 0 ppss) matches-p))))))))
+  ;; We already fontified the delimiters, tell font-lock there's nothing more
+  ;; to do.
+  nil)
+
+;; NB: no face defined here because we apply the faces ourselves instead of
+;; leaving that to font-lock.
+(defconst rainbow-delimiters--font-lock-keywords
+  '(rainbow-delimiters--propertize))
+
+;;;###autoload
+(define-minor-mode rainbow-delimiters-mode
+  "Highlight nested parentheses, brackets, and braces according to their depth."
+  :init-value nil
+  :lighter "" ; No modeline lighter - it's already obvious when the mode is on.
+  :keymap nil
+  (font-lock-remove-keywords nil rainbow-delimiters--font-lock-keywords)
+  (when rainbow-delimiters-mode
+    (font-lock-add-keywords nil rainbow-delimiters--font-lock-keywords 'append)
+    (set (make-local-variable 'jit-lock-contextually) t)
+    (when (or (bound-and-true-p syntax-begin-function)
+              (bound-and-true-p font-lock-beginning-of-syntax-function))
+      ;; We're going to modify `syntax-begin-function', so flush the cache to
+      ;; avoid getting cached values that used the old value.
+      (syntax-ppss-flush-cache 0))
+    ;; `syntax-begin-function' may break the assumption we rely on that
+    ;; `syntax-ppss' is exactly equivalent to `parse-partial-sexp' from
+    ;; `point-min'. Just don't use it, the performance hit should be negligible.
+    (when (boundp 'syntax-begin-function)
+      (set (make-local-variable 'syntax-begin-function) nil))
+    ;; Obsolete equivalent of `syntax-begin-function'.
+    (when (boundp 'font-lock-beginning-of-syntax-function)
+      (set (make-local-variable 'font-lock-beginning-of-syntax-function) nil)))
+  (when font-lock-mode
+    (if (fboundp 'font-lock-flush)
+        (font-lock-flush)
+      (with-no-warnings (font-lock-fontify-buffer)))))
+
+;;;###autoload
+(defun rainbow-delimiters-mode-enable ()
+  "Enable `rainbow-delimiters-mode'."
+  (rainbow-delimiters-mode 1))
+
+;;;###autoload
+(defun rainbow-delimiters-mode-disable ()
+  "Disable `rainbow-delimiters-mode'."
+  (rainbow-delimiters-mode 0))
+
+(provide 'rainbow-delimiters)
+;;; rainbow-delimiters.el ends here
diff --git a/org/elpa/web-server-20210708.2242/dir b/org/elpa/web-server-20210708.2242/dir
new file mode 100644
index 0000000..e3d7778
--- /dev/null
+++ b/org/elpa/web-server-20210708.2242/dir
@@ -0,0 +1,18 @@
+This is the file .../info/dir, which contains the
+topmost node of the Info hierarchy, called (dir)Top.
+The first time you invoke Info you start off looking at this node.
+
+File: dir,	Node: Top	This is the top of the INFO tree
+
+  This (the Directory node) gives a menu of major topics.
+  Typing "q" exits, "H" lists all Info commands, "d" returns here,
+  "h" gives a primer for first-timers,
+  "mEmacs<Return>" visits the Emacs manual, etc.
+
+  In Emacs, you can click mouse button 2 on a menu item or cross reference
+  to select it.
+
+* Menu:
+
+Emacs
+* Web Server: (web-server).     Web Server for Emacs.
diff --git a/org/elpa/web-server-20210708.2242/doclicense.info b/org/elpa/web-server-20210708.2242/doclicense.info
new file mode 100644
index 0000000..30401b7
--- /dev/null
+++ b/org/elpa/web-server-20210708.2242/doclicense.info
@@ -0,0 +1,489 @@
+This is doclicense.info, produced by makeinfo version 6.7 from
+doclicense.texi.
+
+                     Version 1.3, 3 November 2008
+
+     Copyright (C) 2000, 2001, 2002, 2007, 2008, 2009 Free Software Foundation, Inc.
+     <http://fsf.org/>
+
+     Everyone is permitted to copy and distribute verbatim copies
+     of this license document, but changing it is not allowed.
+
+  0. PREAMBLE
+
+     The purpose of this License is to make a manual, textbook, or other
+     functional and useful document "free" in the sense of freedom: to
+     assure everyone the effective freedom to copy and redistribute it,
+     with or without modifying it, either commercially or
+     noncommercially.  Secondarily, this License preserves for the
+     author and publisher a way to get credit for their work, while not
+     being considered responsible for modifications made by others.
+
+     This License is a kind of "copyleft", which means that derivative
+     works of the document must themselves be free in the same sense.
+     It complements the GNU General Public License, which is a copyleft
+     license designed for free software.
+
+     We have designed this License in order to use it for manuals for
+     free software, because free software needs free documentation: a
+     free program should come with manuals providing the same freedoms
+     that the software does.  But this License is not limited to
+     software manuals; it can be used for any textual work, regardless
+     of subject matter or whether it is published as a printed book.  We
+     recommend this License principally for works whose purpose is
+     instruction or reference.
+
+  1. APPLICABILITY AND DEFINITIONS
+
+     This License applies to any manual or other work, in any medium,
+     that contains a notice placed by the copyright holder saying it can
+     be distributed under the terms of this License.  Such a notice
+     grants a world-wide, royalty-free license, unlimited in duration,
+     to use that work under the conditions stated herein.  The
+     "Document", below, refers to any such manual or work.  Any member
+     of the public is a licensee, and is addressed as "you".  You accept
+     the license if you copy, modify or distribute the work in a way
+     requiring permission under copyright law.
+
+     A "Modified Version" of the Document means any work containing the
+     Document or a portion of it, either copied verbatim, or with
+     modifications and/or translated into another language.
+
+     A "Secondary Section" is a named appendix or a front-matter section
+     of the Document that deals exclusively with the relationship of the
+     publishers or authors of the Document to the Document's overall
+     subject (or to related matters) and contains nothing that could
+     fall directly within that overall subject.  (Thus, if the Document
+     is in part a textbook of mathematics, a Secondary Section may not
+     explain any mathematics.)  The relationship could be a matter of
+     historical connection with the subject or with related matters, or
+     of legal, commercial, philosophical, ethical or political position
+     regarding them.
+
+     The "Invariant Sections" are certain Secondary Sections whose
+     titles are designated, as being those of Invariant Sections, in the
+     notice that says that the Document is released under this License.
+     If a section does not fit the above definition of Secondary then it
+     is not allowed to be designated as Invariant.  The Document may
+     contain zero Invariant Sections.  If the Document does not identify
+     any Invariant Sections then there are none.
+
+     The "Cover Texts" are certain short passages of text that are
+     listed, as Front-Cover Texts or Back-Cover Texts, in the notice
+     that says that the Document is released under this License.  A
+     Front-Cover Text may be at most 5 words, and a Back-Cover Text may
+     be at most 25 words.
+
+     A "Transparent" copy of the Document means a machine-readable copy,
+     represented in a format whose specification is available to the
+     general public, that is suitable for revising the document
+     straightforwardly with generic text editors or (for images composed
+     of pixels) generic paint programs or (for drawings) some widely
+     available drawing editor, and that is suitable for input to text
+     formatters or for automatic translation to a variety of formats
+     suitable for input to text formatters.  A copy made in an otherwise
+     Transparent file format whose markup, or absence of markup, has
+     been arranged to thwart or discourage subsequent modification by
+     readers is not Transparent.  An image format is not Transparent if
+     used for any substantial amount of text.  A copy that is not
+     "Transparent" is called "Opaque".
+
+     Examples of suitable formats for Transparent copies include plain
+     ASCII without markup, Texinfo input format, LaTeX input format,
+     SGML or XML using a publicly available DTD, and standard-conforming
+     simple HTML, PostScript or PDF designed for human modification.
+     Examples of transparent image formats include PNG, XCF and JPG.
+     Opaque formats include proprietary formats that can be read and
+     edited only by proprietary word processors, SGML or XML for which
+     the DTD and/or processing tools are not generally available, and
+     the machine-generated HTML, PostScript or PDF produced by some word
+     processors for output purposes only.
+
+     The "Title Page" means, for a printed book, the title page itself,
+     plus such following pages as are needed to hold, legibly, the
+     material this License requires to appear in the title page.  For
+     works in formats which do not have any title page as such, "Title
+     Page" means the text near the most prominent appearance of the
+     work's title, preceding the beginning of the body of the text.
+
+     The "publisher" means any person or entity that distributes copies
+     of the Document to the public.
+
+     A section "Entitled XYZ" means a named subunit of the Document
+     whose title either is precisely XYZ or contains XYZ in parentheses
+     following text that translates XYZ in another language.  (Here XYZ
+     stands for a specific section name mentioned below, such as
+     "Acknowledgements", "Dedications", "Endorsements", or "History".)
+     To "Preserve the Title" of such a section when you modify the
+     Document means that it remains a section "Entitled XYZ" according
+     to this definition.
+
+     The Document may include Warranty Disclaimers next to the notice
+     which states that this License applies to the Document.  These
+     Warranty Disclaimers are considered to be included by reference in
+     this License, but only as regards disclaiming warranties: any other
+     implication that these Warranty Disclaimers may have is void and
+     has no effect on the meaning of this License.
+
+  2. VERBATIM COPYING
+
+     You may copy and distribute the Document in any medium, either
+     commercially or noncommercially, provided that this License, the
+     copyright notices, and the license notice saying this License
+     applies to the Document are reproduced in all copies, and that you
+     add no other conditions whatsoever to those of this License.  You
+     may not use technical measures to obstruct or control the reading
+     or further copying of the copies you make or distribute.  However,
+     you may accept compensation in exchange for copies.  If you
+     distribute a large enough number of copies you must also follow the
+     conditions in section 3.
+
+     You may also lend copies, under the same conditions stated above,
+     and you may publicly display copies.
+
+  3. COPYING IN QUANTITY
+
+     If you publish printed copies (or copies in media that commonly
+     have printed covers) of the Document, numbering more than 100, and
+     the Document's license notice requires Cover Texts, you must
+     enclose the copies in covers that carry, clearly and legibly, all
+     these Cover Texts: Front-Cover Texts on the front cover, and
+     Back-Cover Texts on the back cover.  Both covers must also clearly
+     and legibly identify you as the publisher of these copies.  The
+     front cover must present the full title with all words of the title
+     equally prominent and visible.  You may add other material on the
+     covers in addition.  Copying with changes limited to the covers, as
+     long as they preserve the title of the Document and satisfy these
+     conditions, can be treated as verbatim copying in other respects.
+
+     If the required texts for either cover are too voluminous to fit
+     legibly, you should put the first ones listed (as many as fit
+     reasonably) on the actual cover, and continue the rest onto
+     adjacent pages.
+
+     If you publish or distribute Opaque copies of the Document
+     numbering more than 100, you must either include a machine-readable
+     Transparent copy along with each Opaque copy, or state in or with
+     each Opaque copy a computer-network location from which the general
+     network-using public has access to download using public-standard
+     network protocols a complete Transparent copy of the Document, free
+     of added material.  If you use the latter option, you must take
+     reasonably prudent steps, when you begin distribution of Opaque
+     copies in quantity, to ensure that this Transparent copy will
+     remain thus accessible at the stated location until at least one
+     year after the last time you distribute an Opaque copy (directly or
+     through your agents or retailers) of that edition to the public.
+
+     It is requested, but not required, that you contact the authors of
+     the Document well before redistributing any large number of copies,
+     to give them a chance to provide you with an updated version of the
+     Document.
+
+  4. MODIFICATIONS
+
+     You may copy and distribute a Modified Version of the Document
+     under the conditions of sections 2 and 3 above, provided that you
+     release the Modified Version under precisely this License, with the
+     Modified Version filling the role of the Document, thus licensing
+     distribution and modification of the Modified Version to whoever
+     possesses a copy of it.  In addition, you must do these things in
+     the Modified Version:
+
+       A. Use in the Title Page (and on the covers, if any) a title
+          distinct from that of the Document, and from those of previous
+          versions (which should, if there were any, be listed in the
+          History section of the Document).  You may use the same title
+          as a previous version if the original publisher of that
+          version gives permission.
+
+       B. List on the Title Page, as authors, one or more persons or
+          entities responsible for authorship of the modifications in
+          the Modified Version, together with at least five of the
+          principal authors of the Document (all of its principal
+          authors, if it has fewer than five), unless they release you
+          from this requirement.
+
+       C. State on the Title page the name of the publisher of the
+          Modified Version, as the publisher.
+
+       D. Preserve all the copyright notices of the Document.
+
+       E. Add an appropriate copyright notice for your modifications
+          adjacent to the other copyright notices.
+
+       F. Include, immediately after the copyright notices, a license
+          notice giving the public permission to use the Modified
+          Version under the terms of this License, in the form shown in
+          the Addendum below.
+
+       G. Preserve in that license notice the full lists of Invariant
+          Sections and required Cover Texts given in the Document's
+          license notice.
+
+       H. Include an unaltered copy of this License.
+
+       I. Preserve the section Entitled "History", Preserve its Title,
+          and add to it an item stating at least the title, year, new
+          authors, and publisher of the Modified Version as given on the
+          Title Page.  If there is no section Entitled "History" in the
+          Document, create one stating the title, year, authors, and
+          publisher of the Document as given on its Title Page, then add
+          an item describing the Modified Version as stated in the
+          previous sentence.
+
+       J. Preserve the network location, if any, given in the Document
+          for public access to a Transparent copy of the Document, and
+          likewise the network locations given in the Document for
+          previous versions it was based on.  These may be placed in the
+          "History" section.  You may omit a network location for a work
+          that was published at least four years before the Document
+          itself, or if the original publisher of the version it refers
+          to gives permission.
+
+       K. For any section Entitled "Acknowledgements" or "Dedications",
+          Preserve the Title of the section, and preserve in the section
+          all the substance and tone of each of the contributor
+          acknowledgements and/or dedications given therein.
+
+       L. Preserve all the Invariant Sections of the Document, unaltered
+          in their text and in their titles.  Section numbers or the
+          equivalent are not considered part of the section titles.
+
+       M. Delete any section Entitled "Endorsements".  Such a section
+          may not be included in the Modified Version.
+
+       N. Do not retitle any existing section to be Entitled
+          "Endorsements" or to conflict in title with any Invariant
+          Section.
+
+       O. Preserve any Warranty Disclaimers.
+
+     If the Modified Version includes new front-matter sections or
+     appendices that qualify as Secondary Sections and contain no
+     material copied from the Document, you may at your option designate
+     some or all of these sections as invariant.  To do this, add their
+     titles to the list of Invariant Sections in the Modified Version's
+     license notice.  These titles must be distinct from any other
+     section titles.
+
+     You may add a section Entitled "Endorsements", provided it contains
+     nothing but endorsements of your Modified Version by various
+     parties--for example, statements of peer review or that the text
+     has been approved by an organization as the authoritative
+     definition of a standard.
+
+     You may add a passage of up to five words as a Front-Cover Text,
+     and a passage of up to 25 words as a Back-Cover Text, to the end of
+     the list of Cover Texts in the Modified Version.  Only one passage
+     of Front-Cover Text and one of Back-Cover Text may be added by (or
+     through arrangements made by) any one entity.  If the Document
+     already includes a cover text for the same cover, previously added
+     by you or by arrangement made by the same entity you are acting on
+     behalf of, you may not add another; but you may replace the old
+     one, on explicit permission from the previous publisher that added
+     the old one.
+
+     The author(s) and publisher(s) of the Document do not by this
+     License give permission to use their names for publicity for or to
+     assert or imply endorsement of any Modified Version.
+
+  5. COMBINING DOCUMENTS
+
+     You may combine the Document with other documents released under
+     this License, under the terms defined in section 4 above for
+     modified versions, provided that you include in the combination all
+     of the Invariant Sections of all of the original documents,
+     unmodified, and list them all as Invariant Sections of your
+     combined work in its license notice, and that you preserve all
+     their Warranty Disclaimers.
+
+     The combined work need only contain one copy of this License, and
+     multiple identical Invariant Sections may be replaced with a single
+     copy.  If there are multiple Invariant Sections with the same name
+     but different contents, make the title of each such section unique
+     by adding at the end of it, in parentheses, the name of the
+     original author or publisher of that section if known, or else a
+     unique number.  Make the same adjustment to the section titles in
+     the list of Invariant Sections in the license notice of the
+     combined work.
+
+     In the combination, you must combine any sections Entitled
+     "History" in the various original documents, forming one section
+     Entitled "History"; likewise combine any sections Entitled
+     "Acknowledgements", and any sections Entitled "Dedications".  You
+     must delete all sections Entitled "Endorsements."
+
+  6. COLLECTIONS OF DOCUMENTS
+
+     You may make a collection consisting of the Document and other
+     documents released under this License, and replace the individual
+     copies of this License in the various documents with a single copy
+     that is included in the collection, provided that you follow the
+     rules of this License for verbatim copying of each of the documents
+     in all other respects.
+
+     You may extract a single document from such a collection, and
+     distribute it individually under this License, provided you insert
+     a copy of this License into the extracted document, and follow this
+     License in all other respects regarding verbatim copying of that
+     document.
+
+  7. AGGREGATION WITH INDEPENDENT WORKS
+
+     A compilation of the Document or its derivatives with other
+     separate and independent documents or works, in or on a volume of a
+     storage or distribution medium, is called an "aggregate" if the
+     copyright resulting from the compilation is not used to limit the
+     legal rights of the compilation's users beyond what the individual
+     works permit.  When the Document is included in an aggregate, this
+     License does not apply to the other works in the aggregate which
+     are not themselves derivative works of the Document.
+
+     If the Cover Text requirement of section 3 is applicable to these
+     copies of the Document, then if the Document is less than one half
+     of the entire aggregate, the Document's Cover Texts may be placed
+     on covers that bracket the Document within the aggregate, or the
+     electronic equivalent of covers if the Document is in electronic
+     form.  Otherwise they must appear on printed covers that bracket
+     the whole aggregate.
+
+  8. TRANSLATION
+
+     Translation is considered a kind of modification, so you may
+     distribute translations of the Document under the terms of section
+     4.  Replacing Invariant Sections with translations requires special
+     permission from their copyright holders, but you may include
+     translations of some or all Invariant Sections in addition to the
+     original versions of these Invariant Sections.  You may include a
+     translation of this License, and all the license notices in the
+     Document, and any Warranty Disclaimers, provided that you also
+     include the original English version of this License and the
+     original versions of those notices and disclaimers.  In case of a
+     disagreement between the translation and the original version of
+     this License or a notice or disclaimer, the original version will
+     prevail.
+
+     If a section in the Document is Entitled "Acknowledgements",
+     "Dedications", or "History", the requirement (section 4) to
+     Preserve its Title (section 1) will typically require changing the
+     actual title.
+
+  9. TERMINATION
+
+     You may not copy, modify, sublicense, or distribute the Document
+     except as expressly provided under this License.  Any attempt
+     otherwise to copy, modify, sublicense, or distribute it is void,
+     and will automatically terminate your rights under this License.
+
+     However, if you cease all violation of this License, then your
+     license from a particular copyright holder is reinstated (a)
+     provisionally, unless and until the copyright holder explicitly and
+     finally terminates your license, and (b) permanently, if the
+     copyright holder fails to notify you of the violation by some
+     reasonable means prior to 60 days after the cessation.
+
+     Moreover, your license from a particular copyright holder is
+     reinstated permanently if the copyright holder notifies you of the
+     violation by some reasonable means, this is the first time you have
+     received notice of violation of this License (for any work) from
+     that copyright holder, and you cure the violation prior to 30 days
+     after your receipt of the notice.
+
+     Termination of your rights under this section does not terminate
+     the licenses of parties who have received copies or rights from you
+     under this License.  If your rights have been terminated and not
+     permanently reinstated, receipt of a copy of some or all of the
+     same material does not give you any rights to use it.
+
+  10. FUTURE REVISIONS OF THIS LICENSE
+
+     The Free Software Foundation may publish new, revised versions of
+     the GNU Free Documentation License from time to time.  Such new
+     versions will be similar in spirit to the present version, but may
+     differ in detail to address new problems or concerns.  See
+     <http://www.gnu.org/copyleft/>.
+
+     Each version of the License is given a distinguishing version
+     number.  If the Document specifies that a particular numbered
+     version of this License "or any later version" applies to it, you
+     have the option of following the terms and conditions either of
+     that specified version or of any later version that has been
+     published (not as a draft) by the Free Software Foundation.  If the
+     Document does not specify a version number of this License, you may
+     choose any version ever published (not as a draft) by the Free
+     Software Foundation.  If the Document specifies that a proxy can
+     decide which future versions of this License can be used, that
+     proxy's public statement of acceptance of a version permanently
+     authorizes you to choose that version for the Document.
+
+  11. RELICENSING
+
+     "Massive Multiauthor Collaboration Site" (or "MMC Site") means any
+     World Wide Web server that publishes copyrightable works and also
+     provides prominent facilities for anybody to edit those works.  A
+     public wiki that anybody can edit is an example of such a server.
+     A "Massive Multiauthor Collaboration" (or "MMC") contained in the
+     site means any set of copyrightable works thus published on the MMC
+     site.
+
+     "CC-BY-SA" means the Creative Commons Attribution-Share Alike 3.0
+     license published by Creative Commons Corporation, a not-for-profit
+     corporation with a principal place of business in San Francisco,
+     California, as well as future copyleft versions of that license
+     published by that same organization.
+
+     "Incorporate" means to publish or republish a Document, in whole or
+     in part, as part of another Document.
+
+     An MMC is "eligible for relicensing" if it is licensed under this
+     License, and if all works that were first published under this
+     License somewhere other than this MMC, and subsequently
+     incorporated in whole or in part into the MMC, (1) had no cover
+     texts or invariant sections, and (2) were thus incorporated prior
+     to November 1, 2008.
+
+     The operator of an MMC Site may republish an MMC contained in the
+     site under CC-BY-SA on the same site at any time before August 1,
+     2009, provided the MMC is eligible for relicensing.
+
+ADDENDUM: How to use this License for your documents
+====================================================
+
+To use this License in a document you have written, include a copy of
+the License in the document and put the following copyright and license
+notices just after the title page:
+
+       Copyright (C)  YEAR  YOUR NAME.
+       Permission is granted to copy, distribute and/or modify this document
+       under the terms of the GNU Free Documentation License, Version 1.3
+       or any later version published by the Free Software Foundation;
+       with no Invariant Sections, no Front-Cover Texts, and no Back-Cover
+       Texts.  A copy of the license is included in the section entitled ``GNU
+       Free Documentation License''.
+
+   If you have Invariant Sections, Front-Cover Texts and Back-Cover
+Texts, replace the "with...Texts."  line with this:
+
+         with the Invariant Sections being LIST THEIR TITLES, with
+         the Front-Cover Texts being LIST, and with the Back-Cover Texts
+         being LIST.
+
+   If you have Invariant Sections without Cover Texts, or some other
+combination of the three, merge those two alternatives to suit the
+situation.
+
+   If your document contains nontrivial examples of program code, we
+recommend releasing these examples in parallel under your choice of free
+software license, such as the GNU General Public License, to permit
+their use in free software.
+
+
+
+Tag Table:
+
+End Tag Table
+
+
+Local Variables:
+coding: utf-8
+End:
diff --git a/org/elpa/web-server-20210708.2242/gpl.info b/org/elpa/web-server-20210708.2242/gpl.info
new file mode 100644
index 0000000..3879140
--- /dev/null
+++ b/org/elpa/web-server-20210708.2242/gpl.info
@@ -0,0 +1,721 @@
+This is gpl.info, produced by makeinfo version 6.7 from gpl.texi.
+
+                        Version 3, 29 June 2007
+
+     Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
+
+     Everyone is permitted to copy and distribute verbatim copies of this
+     license document, but changing it is not allowed.
+
+Preamble
+========
+
+The GNU General Public License is a free, copyleft license for software
+and other kinds of works.
+
+   The licenses for most software and other practical works are designed
+to take away your freedom to share and change the works.  By contrast,
+the GNU General Public License is intended to guarantee your freedom to
+share and change all versions of a program--to make sure it remains free
+software for all its users.  We, the Free Software Foundation, use the
+GNU General Public License for most of our software; it applies also to
+any other work released this way by its authors.  You can apply it to
+your programs, too.
+
+   When we speak of free software, we are referring to freedom, not
+price.  Our General Public Licenses are designed to make sure that you
+have the freedom to distribute copies of free software (and charge for
+them if you wish), that you receive source code or can get it if you
+want it, that you can change the software or use pieces of it in new
+free programs, and that you know you can do these things.
+
+   To protect your rights, we need to prevent others from denying you
+these rights or asking you to surrender the rights.  Therefore, you have
+certain responsibilities if you distribute copies of the software, or if
+you modify it: responsibilities to respect the freedom of others.
+
+   For example, if you distribute copies of such a program, whether
+gratis or for a fee, you must pass on to the recipients the same
+freedoms that you received.  You must make sure that they, too, receive
+or can get the source code.  And you must show them these terms so they
+know their rights.
+
+   Developers that use the GNU GPL protect your rights with two steps:
+(1) assert copyright on the software, and (2) offer you this License
+giving you legal permission to copy, distribute and/or modify it.
+
+   For the developers' and authors' protection, the GPL clearly explains
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+TERMS AND CONDITIONS
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+     THE POSSIBILITY OF SUCH DAMAGES.
+
+  17. Interpretation of Sections 15 and 16.
+
+     If the disclaimer of warranty and limitation of liability provided
+     above cannot be given local legal effect according to their terms,
+     reviewing courts shall apply local law that most closely
+     approximates an absolute waiver of all civil liability in
+     connection with the Program, unless a warranty or assumption of
+     liability accompanies a copy of the Program in return for a fee.
+
+END OF TERMS AND CONDITIONS
+===========================
+
+How to Apply These Terms to Your New Programs
+=============================================
+
+If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these
+terms.
+
+   To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least the
+"copyright" line and a pointer to where the full notice is found.
+
+     ONE LINE TO GIVE THE PROGRAM'S NAME AND A BRIEF IDEA OF WHAT IT DOES.
+     Copyright (C) YEAR NAME OF AUTHOR
+
+     This program is free software: you can redistribute it and/or modify
+     it under the terms of the GNU General Public License as published by
+     the Free Software Foundation, either version 3 of the License, or (at
+     your option) any later version.
+
+     This program is distributed in the hope that it will be useful, but
+     WITHOUT ANY WARRANTY; without even the implied warranty of
+     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+     General Public License for more details.
+
+     You should have received a copy of the GNU General Public License
+     along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+   Also add information on how to contact you by electronic and paper
+mail.
+
+   If the program does terminal interaction, make it output a short
+notice like this when it starts in an interactive mode:
+
+     PROGRAM Copyright (C) YEAR NAME OF AUTHOR
+     This program comes with ABSOLUTELY NO WARRANTY; for details type 'show w'.
+     This is free software, and you are welcome to redistribute it
+     under certain conditions; type 'show c' for details.
+
+   The hypothetical commands 'show w' and 'show c' should show the
+appropriate parts of the General Public License.  Of course, your
+program's commands might be different; for a GUI interface, you would
+use an "about box".
+
+   You should also get your employer (if you work as a programmer) or
+school, if any, to sign a "copyright disclaimer" for the program, if
+necessary.  For more information on this, and how to apply and follow
+the GNU GPL, see <http://www.gnu.org/licenses/>.
+
+   The GNU General Public License does not permit incorporating your
+program into proprietary programs.  If your program is a subroutine
+library, you may consider it more useful to permit linking proprietary
+applications with the library.  If this is what you want to do, use the
+GNU Lesser General Public License instead of this License.  But first,
+please read <http://www.gnu.org/philosophy/why-not-lgpl.html>.
+
+
+Tag Table:
+
+End Tag Table
+
+
+Local Variables:
+coding: utf-8
+End:
diff --git a/org/elpa/web-server-20210708.2242/web-server-autoloads.el b/org/elpa/web-server-20210708.2242/web-server-autoloads.el
new file mode 100644
index 0000000..04fec23
--- /dev/null
+++ b/org/elpa/web-server-20210708.2242/web-server-autoloads.el
@@ -0,0 +1,75 @@
+;;; web-server-autoloads.el --- automatically extracted autoloads  -*- lexical-binding: t -*-
+;;
+;;; Code:
+
+(add-to-list 'load-path (directory-file-name
+                         (or (file-name-directory #$) (car load-path))))
+
+
+;;;### (autoloads nil "web-server" "web-server.el" (0 0 0 0))
+;;; Generated autoloads from web-server.el
+
+(autoload 'ws-start "web-server" "\
+Start a server using HANDLERS and return the server object.
+
+HANDLERS may be a single function (which is then called on every
+request) or a list of conses of the form (MATCHER . FUNCTION),
+where the FUNCTION associated with the first successful MATCHER
+is called.  Handler functions are called with two arguments, the
+process and the request object.
+
+A MATCHER may be either a function (in which case it is called on
+the request object) or a cons cell of the form (KEYWORD . STRING)
+in which case STRING is matched against the value of the header
+specified by KEYWORD.
+
+Any supplied NETWORK-ARGS are assumed to be keyword arguments for
+`make-network-process' to which they are passed directly.
+
+For example, the following starts a simple hello-world server on
+port 8080.
+
+  (ws-start
+   (lambda (request)
+     (with-slots (process headers) request
+       (process-send-string process
+        \"HTTP/1.1 200 OK\\r\\nContent-Type: text/plain\\r\\n\\r\\nhello world\")))
+   8080)
+
+Equivalently, the following starts an identical server using a
+function MATCH and the `ws-response-header' convenience
+function.
+
+  (ws-start
+   `(((lambda (_) t) .
+      (lambda (request)
+        (with-slots ((proc process)) request
+          (ws-response-header proc 200 '(\"Content-Type\" . \"text/plain\"))
+          (process-send-string proc \"hello world\")))))
+   8080)
+
+\(fn HANDLERS PORT &optional LOG-BUFFER &rest NETWORK-ARGS)" nil nil)
+
+(register-definition-prefixes "web-server" '("ws-"))
+
+;;;***
+
+;;;### (autoloads nil "web-server-status-codes" "web-server-status-codes.el"
+;;;;;;  (0 0 0 0))
+;;; Generated autoloads from web-server-status-codes.el
+
+(register-definition-prefixes "web-server-status-codes" '("ws-status-codes"))
+
+;;;***
+
+;;;### (autoloads nil nil ("web-server-pkg.el") (0 0 0 0))
+
+;;;***
+
+;; Local Variables:
+;; version-control: never
+;; no-byte-compile: t
+;; no-update-autoloads: t
+;; coding: utf-8
+;; End:
+;;; web-server-autoloads.el ends here
diff --git a/org/elpa/web-server-20210708.2242/web-server-pkg.el b/org/elpa/web-server-20210708.2242/web-server-pkg.el
new file mode 100644
index 0000000..3aa795d
--- /dev/null
+++ b/org/elpa/web-server-20210708.2242/web-server-pkg.el
@@ -0,0 +1,13 @@
+(define-package "web-server" "20210708.2242" "Emacs Web Server"
+  '((emacs "24.1")
+    (cl-lib "0.6"))
+  :commit "6357a1c2d1718778503f7ee0909585094117525b" :authors
+  '(("Eric Schulte" . "schulte.eric@gmail.com"))
+  :maintainer
+  '("Eric Schulte" . "schulte.eric@gmail.com")
+  :keywords
+  '("http" "server" "network")
+  :url "https://github.com/eschulte/emacs-web-server")
+;; Local Variables:
+;; no-byte-compile: t
+;; End:
diff --git a/org/elpa/web-server-20210708.2242/web-server-status-codes.el b/org/elpa/web-server-20210708.2242/web-server-status-codes.el
new file mode 100644
index 0000000..158b596
--- /dev/null
+++ b/org/elpa/web-server-20210708.2242/web-server-status-codes.el
@@ -0,0 +1,106 @@
+;;; web-server-status-codes.el --- Emacs Web Server HTML status codes  -*- lexical-binding: t; -*-
+
+;; Copyright (C) 2013-2021  Free Software Foundation, Inc.
+
+;; This software is free software: you can redistribute it and/or modify
+;; it under the terms of the GNU General Public License as published by
+;; the Free Software Foundation, either version 3 of the License, or
+;; (at your option) any later version.
+
+;; This software is distributed in the hope that it will be useful,
+;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+;; GNU General Public License for more details.
+
+;; You should have received a copy of the GNU General Public License
+;; along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.
+
+;;; Code:
+(defvar ws-status-codes
+  '((100 . "Continue")
+    (101 . "Switching Protocols")
+    (102 . "Processing")
+    (200 . "OK")
+    (201 . "Created")
+    (202 . "Accepted")
+    (203 . "Non-Authoritative Information")
+    (204 . "No Content")
+    (205 . "Reset Content")
+    (206 . "Partial Content")
+    (207 . "Multi-Status")
+    (208 . "Already Reported")
+    (226 . "IM Used")
+    (300 . "Multiple Choices")
+    (301 . "Moved Permanently")
+    (302 . "Found")
+    (303 . "See Other")
+    (304 . "Not Modified")
+    (305 . "Use Proxy")
+    (306 . "Switch Proxy")
+    (307 . "Temporary Redirect")
+    (308 . "Permanent Redirect")
+    (400 . "Bad Request")
+    (401 . "Unauthorized")
+    (402 . "Payment Required")
+    (403 . "Forbidden")
+    (404 . "Not Found")
+    (405 . "Method Not Allowed")
+    (406 . "Not Acceptable")
+    (407 . "Proxy Authentication Required")
+    (408 . "Request Timeout")
+    (409 . "Conflict")
+    (410 . "Gone")
+    (411 . "Length Required")
+    (412 . "Precondition Failed")
+    (413 . "Request Entity Too Large")
+    (414 . "Request-URI Too Long")
+    (415 . "Unsupported Media Type")
+    (416 . "Requested Range Not Satisfiable")
+    (417 . "Expectation Failed")
+    (418 . "I'm a teapot")
+    (419 . "Authentication Timeout")
+    (420 . "Method Failure")
+    (420 . "Enhance Your Calm")
+    (422 . "Unprocessable Entity")
+    (423 . "Locked")
+    (424 . "Failed Dependency")
+    (424 . "Method Failure")
+    (425 . "Unordered Collection")
+    (426 . "Upgrade Required")
+    (428 . "Precondition Required")
+    (429 . "Too Many Requests")
+    (431 . "Request Header Fields Too Large")
+    (440 . "Login Timeout")
+    (444 . "No Response")
+    (449 . "Retry With")
+    (450 . "Blocked by Windows Parental Controls")
+    (451 . "Unavailable For Legal Reasons")
+    (451 . "Redirect")
+    (494 . "Request Header Too Large")
+    (495 . "Cert Error")
+    (496 . "No Cert")
+    (497 . "HTTP to HTTPS")
+    (499 . "Client Closed Request")
+    (500 . "Internal Server Error")
+    (501 . "Not Implemented")
+    (502 . "Bad Gateway")
+    (503 . "Service Unavailable")
+    (504 . "Gateway Timeout")
+    (505 . "HTTP Version Not Supported")
+    (506 . "Variant Also Negotiates")
+    (507 . "Insufficient Storage")
+    (508 . "Loop Detected")
+    (509 . "Bandwidth Limit Exceeded")
+    (510 . "Not Extended")
+    (511 . "Network Authentication Required")
+    (520 . "Origin Error")
+    (522 . "Connection timed out")
+    (523 . "Proxy Declined Request")
+    (524 . "A timeout occurred")
+    (598 . "Network read timeout error")
+    (599 . "Network connect timeout error"))
+  "Possible HTML status codes with names.
+From http://en.wikipedia.org/wiki/List_of_HTTP_status_codes.")
+
+(provide 'web-server-status-codes)
+;;; web-server-status-codes.el ends here
diff --git a/org/elpa/web-server-20210708.2242/web-server.el b/org/elpa/web-server-20210708.2242/web-server.el
new file mode 100644
index 0000000..de6cb91
--- /dev/null
+++ b/org/elpa/web-server-20210708.2242/web-server.el
@@ -0,0 +1,749 @@
+;;; web-server.el --- Emacs Web Server -*- lexical-binding: t -*-
+
+;; Copyright (C) 2013-2014 Free Software Foundation, Inc.
+
+;; Author: Eric Schulte <schulte.eric@gmail.com>
+;; Maintainer: Eric Schulte <schulte.eric@gmail.com>
+;; Version: 0.1.2
+;; Package-Requires: ((emacs "24.1") (cl-lib "0.6"))
+;; Keywords: http, server, network
+;; URL: https://github.com/eschulte/emacs-web-server
+
+;; This software is free software: you can redistribute it and/or modify
+;; it under the terms of the GNU General Public License as published by
+;; the Free Software Foundation, either version 3 of the License, or
+;; (at your option) any later version.
+
+;; This software is distributed in the hope that it will be useful,
+;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+;; GNU General Public License for more details.
+
+;; You should have received a copy of the GNU General Public License
+;; along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.
+
+;;; Commentary:
+
+;; A web server in Emacs running handlers written in Emacs Lisp.
+;;
+;; Full support for GET and POST requests including URL-encoded
+;; parameters and multipart/form data.  Supports web sockets.
+;;
+;; See the examples/ directory for examples demonstrating the usage of
+;; the Emacs Web Server.  The following launches a simple "hello
+;; world" server.
+;;
+;;     (ws-start
+;;      '(((lambda (_) t) .                         ; match every request
+;;         (lambda (request)                        ; reply with "hello world"
+;;           (with-slots (process) request
+;;             (ws-response-header process 200 '("Content-type" . "text/plain"))
+;;             (process-send-string process "hello world")))))
+;;      9000)
+
+;;; Code:
+(require 'web-server-status-codes)
+(require 'mail-parse)             ; to parse multipart data in headers
+(require 'mm-encode)              ; to look-up mime types for files
+(require 'url-util)               ; to decode url-encoded params
+(require 'eieio)
+(require 'cl-lib)
+
+(defclass ws-server ()
+  ((handlers :initarg :handlers :accessor ws-handlers :initform nil)
+   (process  :initarg :process  :accessor ws-process  :initform nil)
+   (port     :initarg :port     :accessor ws-port     :initform nil)
+   (requests :initarg :requests :accessor ws-requests :initform nil)))
+
+(defclass ws-request ()
+  ((process  :initarg :process  :accessor ws-process  :initform nil)
+   (pending  :initarg :pending  :accessor ws-pending  :initform "")
+   (context  :initarg :context  :accessor ws-context  :initform nil)
+   (boundary :initarg :boundary :accessor ws-boundary :initform nil)
+   (index    :initarg :index    :accessor ws-index    :initform 0)
+   (active   :initarg :active   :accessor ws-active   :initform nil)
+   (headers  :initarg :headers  :accessor ws-headers  :initform (list nil))
+   (body     :initarg :body     :accessor ws-body     :initform "")))
+
+(defvar ws-servers nil
+  "List holding all web servers.")
+
+(defvar ws-log-time-format "%Y.%m.%d.%H.%M.%S.%N"
+  "Logging time format passed to `format-time-string'.")
+
+(defvar ws-guid "258EAFA5-E914-47DA-95CA-C5AB0DC85B11"
+  "This GUID is defined in RFC6455.")
+
+;;;###autoload
+(defun ws-start (handlers port &optional log-buffer &rest network-args)
+  "Start a server using HANDLERS and return the server object.
+
+HANDLERS may be a single function (which is then called on every
+request) or a list of conses of the form (MATCHER . FUNCTION),
+where the FUNCTION associated with the first successful MATCHER
+is called.  Handler functions are called with two arguments, the
+process and the request object.
+
+A MATCHER may be either a function (in which case it is called on
+the request object) or a cons cell of the form (KEYWORD . STRING)
+in which case STRING is matched against the value of the header
+specified by KEYWORD.
+
+Any supplied NETWORK-ARGS are assumed to be keyword arguments for
+`make-network-process' to which they are passed directly.
+
+For example, the following starts a simple hello-world server on
+port 8080.
+
+  (ws-start
+   (lambda (request)
+     (with-slots (process headers) request
+       (process-send-string process
+        \"HTTP/1.1 200 OK\\r\\nContent-Type: text/plain\\r\\n\\r\\nhello world\")))
+   8080)
+
+Equivalently, the following starts an identical server using a
+function MATCH and the `ws-response-header' convenience
+function.
+
+  (ws-start
+   `(((lambda (_) t) .
+      (lambda (request)
+        (with-slots ((proc process)) request
+          (ws-response-header proc 200 '(\"Content-Type\" . \"text/plain\"))
+          (process-send-string proc \"hello world\")))))
+   8080)
+
+"
+  (let ((server (make-instance 'ws-server :handlers handlers :port port))
+        (log (when log-buffer (get-buffer-create log-buffer))))
+    (setf (ws-process server)
+          (apply
+           #'make-network-process
+           :name "ws-server"
+           :service (ws-port server)
+           :filter 'ws-filter
+           :server t
+           :nowait (< emacs-major-version 26)
+           :family 'ipv4
+           :coding 'no-conversion
+           :plist (append (list :server server)
+                          (when log (list :log-buffer log)))
+           :log (when log
+                  (lambda (proc request message)
+                    (let ((c (process-contact request))
+                          (buf (plist-get (process-plist proc) :log-buffer)))
+                      (with-current-buffer buf
+                        (goto-char (point-max))
+                        (insert (format "%s\t%s\t%s\t%s"
+                                        (format-time-string ws-log-time-format)
+                                        (cl-first c) (cl-second c) message))))))
+           network-args))
+    (push server ws-servers)
+    server))
+
+(defun ws-stop (server)
+  "Stop SERVER."
+  (setq ws-servers (remove server ws-servers))
+  (mapc #'delete-process (append (mapcar #'ws-process (ws-requests server))
+                                 (list (ws-process server)))))
+
+(defun ws-stop-all ()
+  "Stop all servers in `ws-servers'."
+  (interactive)
+  (mapc #'ws-stop ws-servers))
+
+(defvar ws-http-common-methods '(GET HEAD POST PUT DELETE TRACE)
+  "HTTP methods from http://www.w3.org/Protocols/rfc2616/rfc2616-sec9.html.")
+
+(defvar ws-http-method-rx
+  (format "^\\(%s\\) \\([^[:space:]]+\\) \\([^[:space:]]+\\)$"
+          (mapconcat #'symbol-name ws-http-common-methods "\\|")))
+
+(defun ws-parse-query-string (string)
+  "Thin wrapper around `url-parse-query-string'."
+  (mapcar (lambda (pair) (cons (cl-first pair) (cl-second pair)))
+          (url-parse-query-string string nil 'allow-newlines)))
+
+(defun ws-parse (proc string)
+  "Parse HTTP headers in STRING reporting errors to PROC."
+  (cl-flet ((to-keyword (s) (intern (concat ":" (upcase s)))))
+    (cond
+     ;; Method
+     ((string-match ws-http-method-rx string)
+      (let ((method (to-keyword (match-string 1 string)))
+            (url (match-string 2 string)))
+        (if (string-match "?" url)
+            (cons (cons method (substring url 0 (match-beginning 0)))
+                  (ws-parse-query-string
+                   (url-unhex-string (substring url (match-end 0)))))
+          (list (cons method url)))))
+     ;; Authorization
+     ((string-match "^AUTHORIZATION: \\([^[:space:]]+\\) \\(.*\\)$" string)
+      (let ((protocol (to-keyword (match-string 1 string)))
+            (credentials (match-string 2 string)))
+        (list (cons :AUTHORIZATION
+                    (cons protocol
+                          (cl-case protocol
+                            (:BASIC
+                             (let ((cred (base64-decode-string credentials)))
+                               (if (string-match ":" cred)
+                                   (cons (substring cred 0 (match-beginning 0))
+                                         (substring cred (match-end 0)))
+                                 (ws-error proc "bad credentials: %S" cred))))
+                            (t (ws-error proc "un-support protocol: %s"
+                                         protocol))))))))
+     ;; All other headers
+     ((string-match "^\\([^[:space:]]+\\): \\(.*\\)$" string)
+      (list (cons (to-keyword (match-string 1 string))
+                  (match-string 2 string))))
+     (:otherwise (ws-error proc "bad header: %S" string) nil))))
+
+(defun ws-trim (string)
+  (while (and (> (length string) 0)
+              (or (and (string-match "[\r\n]" (substring string -1))
+                       (setq string (substring string 0 -1)))
+                  (and (string-match "[\r\n]" (substring string 0 1))
+                       (setq string (substring string 1))))))
+  string)
+
+(defun ws-parse-multipart/form (proc string)
+  ;; ignore empty and non-content blocks
+  (when (string-match "Content-Disposition:[[:space:]]*\\(.*\\)\r\n" string)
+    (let ((dp (cdr (mail-header-parse-content-disposition
+                    (match-string 1 string))))
+          (last-index (match-end 0))
+          index)
+      ;; every line up until the double \r\n is a header
+      (while (and (setq index (string-match "\r\n" string last-index))
+                  (not (= index last-index)))
+        (setcdr (last dp) (ws-parse proc (substring string last-index index)))
+        (setq last-index (+ 2 index)))
+      ;; after double \r\n is all content
+      (cons (cdr (assoc 'name dp))
+            (cons (cons 'content (substring string (+ 2 last-index)))
+                  dp)))))
+
+(defun ws-filter (proc string)
+  (with-slots (handlers requests) (plist-get (process-plist proc) :server)
+    (unless (cl-find-if (lambda (c) (equal proc (ws-process c))) requests)
+      (push (make-instance 'ws-request :process proc) requests))
+    (let ((request (cl-find-if (lambda (c) (equal proc (ws-process c))) requests)))
+      (with-slots (pending) request (setq pending (concat pending string)))
+      (unless (ws-active request) ; don't re-start if request is being parsed
+        (setf (ws-active request) t)
+        (when (not (eq (catch 'close-connection
+                         (if (ws-parse-request request)
+                             (ws-call-handler request handlers)
+                           :keep-alive))
+                       :keep-alive))
+          ;; Properly shut down processes requiring an ending (e.g., chunked)
+          (let ((ender (plist-get (process-plist proc) :ender)))
+            (when ender (process-send-string proc ender)))
+          (setq requests (cl-remove-if (lambda (r) (eql proc (ws-process r))) requests))
+          (delete-process proc))))))
+
+(defun ws-parse-request (request)
+  "Parse request STRING from REQUEST with process PROC.
+Return non-nil only when parsing is complete."
+  (catch 'finished-parsing-headers
+    (with-slots (process pending context boundary headers body index) request
+      (let ((delimiter (concat "\r\n" (if boundary (concat "--" boundary) "")))
+            ;; Track progress through string, always work with the
+            ;; section of string between INDEX and NEXT-INDEX.
+            next-index
+            body-stored)
+        ;; parse headers and append to request
+        (while (setq next-index (string-match delimiter pending index))
+          (let ((tmp (+ next-index (length delimiter))))
+            (if (= index next-index) ; double \r\n ends current run of headers
+                (progn
+                  ;; Store the body
+                  (unless
+                      ;; Multipart form data has multiple passes - store on
+                      ;; first pass only.
+                      body-stored
+                    (let ((after-headers (substring pending index)))
+                      (when (string-prefix-p "\r\n" after-headers)
+                        (setq body
+                              ;; Trim off the additional CRLF
+                              (substring after-headers 2))))
+                    (setq body-stored t))
+                  (cl-case context
+                    ;; Parse URL data.
+                    ;; http://www.w3.org/TR/html4/interact/forms.html#h-17.13.4
+                    (application/x-www-form-urlencoded
+                     (mapc (lambda (pair) (setcdr (last headers) (list pair)))
+                           (ws-parse-query-string
+                            (replace-regexp-in-string
+                             "\\+" " "
+                             (ws-trim (substring pending index)))))
+                     (throw 'finished-parsing-headers t))
+                    ;; Set custom delimiter for multipart form data.
+                    (multipart/form-data
+                     (setq delimiter (concat "\r\n--" boundary)))
+                    ;; No special context so we're done.
+                    (t (throw 'finished-parsing-headers t))))
+              (if (eql context 'multipart/form-data)
+                  (progn
+                    (setcdr (last headers)
+                            (list (ws-parse-multipart/form process
+                                    (substring pending index next-index))))
+                    ;; Boundary suffixed by "--" indicates end of the headers.
+                    (when (and (> (length pending) (+ tmp 2))
+                               (string= (substring pending tmp (+ tmp 2)) "--"))
+                      (throw 'finished-parsing-headers t)))
+                ;; Standard header parsing.
+                (let ((header (ws-parse process (substring pending
+                                                           index next-index))))
+                  ;; Content-Type indicates that the next double \r\n
+                  ;; will be followed by a special type of content which
+                  ;; will require special parsing.  Thus we will note
+                  ;; the type in the CONTEXT variable for parsing
+                  ;; dispatch above.
+                  (when (and (caar header) (eql (caar header) :CONTENT-TYPE))
+                    (cl-destructuring-bind (type &rest data)
+                        (mail-header-parse-content-type (cdar header))
+                      (setq boundary (cdr (assoc 'boundary data)))
+                      (setq context (intern (downcase type)))))
+                  ;; All other headers are collected directly.
+                  (setcdr (last headers) header))))
+            (setq index tmp)))))
+    (setf (ws-active request) nil)
+    nil))
+
+(defun ws-call-handler (request handlers)
+  (catch 'matched-handler
+    (when (functionp handlers)
+      (throw 'matched-handler
+             (condition-case e (funcall handlers request)
+               (error (ws-error (ws-process request) "Caught Error: %S" e)))))
+    (mapc (lambda (handler)
+            (let ((match (car handler))
+                  (function (cdr handler)))
+              (when (or (and (consp match)
+                             (assoc (car match) (ws-headers request))
+                             (string-match (cdr match)
+                                           (cdr (assoc (car match)
+                                                       (ws-headers request)))))
+                        (and (functionp match) (funcall match request)))
+                (throw 'matched-handler
+                       (condition-case e (funcall function request)
+                         (error (ws-error (ws-process request)
+                                          "Caught Error: %S" e)))))))
+          handlers)
+    (ws-error (ws-process request) "no handler matched request: %S"
+              (ws-headers request))))
+
+(defun ws-error (proc msg &rest args)
+  (let ((buf (plist-get (process-plist proc) :log-buffer))
+        (c (process-contact proc)))
+    (when buf
+      (with-current-buffer buf
+        (goto-char (point-max))
+        (insert (format "%s\t%s\t%s\tWS-ERROR: %s"
+                        (format-time-string ws-log-time-format)
+                        (cl-first c) (cl-second c)
+                        (apply #'format msg args)))))
+    (apply #'ws-send-500 proc msg args)))
+
+
+;;; Web Socket
+;; Implement to conform to http://tools.ietf.org/html/rfc6455.
+
+;; The `ws-message' object is used to hold state across multiple calls
+;; of the process filter on the websocket network process.  The fields
+;; play the following roles.
+;; process ------ holds the process itself, used for communication
+;; pending ------ holds text received from the client but not yet parsed
+;; active ------- indicates that parsing is active to avoid re-entry
+;;                of the `ws-web-socket-parse-messages' function
+;; new ---------- indicates that new text was received during parsing
+;;                and causes `ws-web-socket-parse-messages' to be
+;;                called again after it terminates
+;; data --------- holds the data of parsed messages
+;; handler ------ holds the user-supplied function of two arguments
+;;                called on the process and the data of parsed
+;;                messages
+(defclass ws-message ()                 ; web socket message object
+  ((process  :initarg :process  :accessor ws-process  :initform "")
+   (pending  :initarg :pending  :accessor ws-pending  :initform "")
+   (active   :initarg :active   :accessor ws-active   :initform nil)
+   (new      :initarg :new      :accessor ws-new      :initform nil)
+   (data     :initarg :data     :accessor ws-data     :initform "")
+   (handler  :initarg :handler  :accessor ws-handler  :initform "")))
+
+(defun ws-web-socket-connect (request handler)
+  "Establish a web socket connection with request.
+If the connection is successful this function will throw
+`:keep-alive' to `close-connection' skipping any remaining code
+in the request handler.  If no web-socket connection is
+established (e.g., because REQUEST is not attempting to establish
+a connection) then no actions are taken and nil is returned.
+
+Second argument HANDLER should be a function of two arguments,
+the process and a string, which will be called on all complete
+messages as they are received and parsed from the network."
+  (with-slots (process headers) request
+    (when (assoc :SEC-WEBSOCKET-KEY headers)
+      ;; Accept the connection
+      (ws-response-header process 101
+        (cons "Upgrade" "websocket")
+        (cons "Connection" "upgrade")
+        (cons "Sec-WebSocket-Accept"
+              (ws-web-socket-handshake
+               (cdr (assoc :SEC-WEBSOCKET-KEY headers)))))
+      ;; Setup the process filter
+      (set-process-coding-system process 'binary)
+      (set-process-plist
+       process (list :message (make-instance 'ws-message
+                                :handler handler :process process)))
+      (set-process-filter process 'ws-web-socket-filter)
+      process)))
+
+(defun ws-web-socket-filter (process string)
+  (let ((message (plist-get (process-plist process) :message)))
+    (if (ws-active message) ; don't re-start if message is being parsed
+        (setf (ws-new message) string)
+      (setf (ws-pending message) (concat (ws-pending message) string))
+      (setf (ws-active message) t)
+      (ws-web-socket-parse-messages message))
+    (setf (ws-active message) nil)))
+
+(defun ws-web-socket-mask (masking-key data)
+  (let ((masking-data (apply #'concat (make-list (+ 1 (/ (length data) 4))
+                                                 masking-key))))
+    (apply #'string (cl-mapcar #'logxor masking-data data))))
+
+;; Binary framing protocol
+;; from http://tools.ietf.org/html/rfc6455#section-5.2
+;;
+;;  0                   1                   2                   3
+;;  0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+;; +-+-+-+-+-------+-+-------------+-------------------------------+
+;; |F|R|R|R| opcode|M| Payload len |    Extended payload length    |
+;; |I|S|S|S|  (4)  |A|     (7)     |             (16/64)           |
+;; |N|V|V|V|       |S|             |   (if payload len==126/127)   |
+;; | |1|2|3|       |K|             |                               |
+;; +-+-+-+-+-------+-+-------------+ - - - - - - - - - - - - - - - +
+;; |     Extended payload length continued, if payload len == 127  |
+;; + - - - - - - - - - - - - - - - +-------------------------------+
+;; |                               |Masking-key, if MASK set to 1  |
+;; +-------------------------------+-------------------------------+
+;; | Masking-key (continued)       |          Payload Data         |
+;; +-------------------------------- - - - - - - - - - - - - - - - +
+;; :                     Payload Data continued ...                :
+;; + - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - +
+;; |                     Payload Data continued ...                |
+;; +---------------------------------------------------------------+
+;;
+(defun ws-web-socket-parse-messages (message)
+  "Web socket filter to pass whole frames to the client.
+See RFC6455."
+  (with-slots (process active pending data handler new) message
+    (let ((index 0))
+      (cl-labels ((int-to-bits (int size)
+                    (let ((result (make-bool-vector size nil)))
+                      (mapc (lambda (place)
+                              (let ((val (expt 2 place)))
+                                (when (>= int val)
+                                  (setq int (- int val))
+                                  (aset result place t))))
+                            (reverse (number-sequence 0 (- size 1))))
+                      (reverse (append result nil))))
+                  (bits-to-int (bits)
+                    (let ((place 0))
+                      (apply #'+
+                       (mapcar (lambda (bit)
+                                 (prog1 (if bit (expt 2 place) 0) (cl-incf place)))
+                               (reverse bits)))))
+                  (bits (length)
+                    (apply #'append
+                           (mapcar (lambda (int) (int-to-bits int 8))
+                                   (cl-subseq
+                                    pending index (cl-incf index length))))))
+        (let (fin rsvs opcode mask pl mask-key)
+          ;; Parse fin bit, rsvs bits and opcode
+          (let ((byte (bits 1)))
+            (setq fin (car byte)
+                  rsvs (cl-subseq byte 1 4)
+                  opcode
+                  (let ((it (bits-to-int (cl-subseq byte 4))))
+                    (cl-case it
+                      (0 :CONTINUATION)
+                      (1 :TEXT)
+                      (2 :BINARY)
+                      ((3 4 5 6 7) :NON-CONTROL)
+                      (8 :CLOSE)
+                      (9 :PING)
+                      (10 :PONG)
+                      ((11 12 13 14 15) :CONTROL)
+                      ;; If an unknown opcode is received, the receiving
+                      ;; endpoint MUST _Fail the WebSocket Connection_.
+                      (t (ws-error process
+                                   "Web Socket Fail: bad opcode %d" it))))))
+          (unless (cl-every #'null rsvs)
+            ;; MUST be 0 unless an extension is negotiated that defines
+            ;; meanings for non-zero values.
+            (ws-error process "Web Socket Fail: non-zero RSV 1 2 or 3"))
+          ;; Parse mask and payload length
+          (let ((byte (bits 1)))
+            (setq mask (car byte)
+                  pl (bits-to-int (cl-subseq byte 1))))
+          (unless (eq mask t)
+            ;; All frames sent from client to server have this bit set to 1.
+            (ws-error process "Web Socket Fail: client must mask data"))
+          (cond
+           ((= pl 126) (setq pl (bits-to-int (bits 2))))
+           ((= pl 127) (setq pl (bits-to-int (bits 8)))))
+          ;; unmask data
+          (when mask (setq mask-key (cl-subseq pending index (cl-incf index 4))))
+          (setq data (concat data
+                             (ws-web-socket-mask
+                              mask-key (cl-subseq pending index (+ index pl)))))
+          (if fin
+              ;; wipe the message state and call the handler
+              (let ((it data))
+                (setq data "" active nil pending "" new nil)
+                ;; close on a close frame, otherwise call the handler
+                (if (not (eql opcode :CLOSE))
+                    (funcall handler process it)
+                  (process-send-string process
+                    (unibyte-string (logior (lsh 1 7) 8) 0))))
+            ;; add any remaining un-parsed network data to pending
+            (when (< (+ index pl) (length pending))
+              (setq pending (substring pending (+ index pl)))))))
+      ;; possibly re-parse any pending input
+      (when (ws-new message) (ws-web-socket-parse-messages message)))))
+
+(defun ws-web-socket-frame (string &optional opcode)
+  "Frame STRING for web socket communication."
+  (let* ((fin 1) ;; set to 0 if not final frame
+         (len (length string))
+         (opcode (cl-ecase (or opcode :TEXT) (:TEXT 1) (:BINARY 2))))
+    ;; Does not do any masking which is only required of client communication
+    (concat
+     (cond
+      ((< len 126) (unibyte-string (logior (lsh fin 7) opcode) len))
+      ((< len 65536) (unibyte-string (logior (lsh fin 7) opcode) 126
+                                     ;; extended 16-bit length
+                                     (logand (lsh len -8) 255)
+                                     (logand      len     255)))
+      (t (unibyte-string (logior (lsh fin 7) opcode) 127
+                         ;; more extended 64-bit length
+                         (logand (lsh len -56) 255)
+                         (logand (lsh len -48) 255)
+                         (logand (lsh len -40) 255)
+                         (logand (lsh len -32) 255)
+                         (logand (lsh len -24) 255)
+                         (logand (lsh len -16) 255)
+                         (logand (lsh len -8)  255)
+                         (logand      len      255))))
+     string)))
+
+
+;;; Content and Transfer encoding support
+(defvar ws-compress-cmd "compress"
+  "Command used for the \"compress\" Content or Transfer coding.")
+
+(defvar ws-deflate-cmd "zlib-flate -compress"
+  "Command used for the \"deflate\" Content or Transfer coding.")
+
+(defvar ws-gzip-cmd "gzip"
+  "Command used for the \"gzip\" Content or Transfer coding.")
+
+(defmacro ws-encoding-cmd-to-fn (cmd)
+  "Return a function which applies CMD to strings."
+  `(lambda (s)
+     (with-temp-buffer
+       (insert s)
+       (shell-command-on-region (point-min) (point-max) ,cmd nil 'replace)
+       (buffer-string))))
+
+(defun ws-chunk (string)
+  "Convert STRING to a valid chunk for HTTP chunked Transfer-encoding."
+  (format "%x\r\n%s\r\n" (string-bytes string) string))
+
+
+;;; Convenience functions to write responses
+(defun ws-response-header (proc code &rest headers)
+  "Send the headers for an HTTP response to PROC.
+CODE should be an HTTP status code, see `ws-status-codes' for a
+list of known codes.
+
+When \"Content-Encoding\" or \"Transfer-Encoding\" headers are
+supplied any subsequent data written to PROC using `ws-send' will
+be encoded appropriately including sending the appropriate data
+upon the end of transmission for chunked transfer encoding.
+
+For example with the header `(\"Content-Encoding\" . \"gzip\")',
+any data subsequently written to PROC using `ws-send' will be
+compressed using the command specified in `ws-gzip-cmd'."
+  ;; update process to reflect any Content or Transfer encodings
+  (let ((content  (cdr (assoc "Content-Encoding" headers)))
+        (transfer (cdr (assoc "Transfer-Encoding" headers))))
+    (when content
+      (set-process-plist proc
+        (append
+         (list :content-encoding
+               (cl-ecase (intern content)
+                 ((compress x-compress) (ws-encoding-cmd-to-fn ws-compress-cmd))
+                 ((deflate x-deflate)   (ws-encoding-cmd-to-fn ws-deflate-cmd))
+                 ((gzip x-gzip)         (ws-encoding-cmd-to-fn ws-gzip-cmd))
+                 (identity #'identity)
+                 ((exi pack200-zip)
+                  (ws-error proc "`%s' Content-encoding not supported."
+                            content))))
+         (process-plist proc))))
+    (when transfer
+      (set-process-plist proc
+        (append
+         (when (string= transfer "chunked") (list :ender "0\r\n\r\n"))
+         (list :transfer-encoding
+               (cl-ecase (intern transfer)
+                 (chunked  #'ws-chunk)
+                 ((compress x-compress) (ws-encoding-cmd-to-fn ws-compress-cmd))
+                 ((deflate x-deflate)   (ws-encoding-cmd-to-fn ws-deflate-cmd))
+                 ((gzip x-gzip)         (ws-encoding-cmd-to-fn ws-gzip-cmd))))
+         (process-plist proc)))))
+  (let ((headers
+         (cons
+          (format "HTTP/1.1 %d %s" code (cdr (assoc code ws-status-codes)))
+          (mapcar (lambda (h) (format "%s: %s" (car h) (cdr h))) headers))))
+    (setcdr (last headers) (list "" ""))
+    (process-send-string proc (mapconcat #'identity headers "\r\n"))))
+
+(defun ws-send (proc string)
+  "Send STRING to process PROC.
+If any Content or Transfer encodings are in use, apply them to
+STRING before sending."
+  (let
+      ((cc (or (plist-get (process-plist proc) :content-encoding) #'identity))
+       (tc (or (plist-get (process-plist proc) :transfer-encoding) #'identity)))
+    (process-send-string proc (funcall tc (funcall cc string)))))
+
+(defun ws-send-500 (proc &rest msg-and-args)
+  "Send 500 \"Internal Server Error\" to PROC with an optional message."
+  (ws-response-header proc 500
+    '("Content-type" . "text/plain"))
+  (process-send-string proc (if msg-and-args
+                                (apply #'format msg-and-args)
+                              "500 Internal Server Error"))
+  (throw 'close-connection nil))
+
+(defun ws-send-404 (proc &rest msg-and-args)
+  "Send 404 \"Not Found\" to PROC with an optional message."
+  (ws-response-header proc 404
+    '("Content-type" . "text/plain"))
+  (process-send-string proc (if msg-and-args
+                                (apply #'format msg-and-args)
+                              "404 Not Found"))
+  (throw 'close-connection nil))
+
+(defun ws-send-file (proc path &optional mime-type)
+  "Send PATH to PROC.
+Optionally explicitly set MIME-TYPE, otherwise it is guessed by
+`mm-default-file-encoding'."
+  (let ((mime (or mime-type
+                  (mm-default-file-encoding path)
+                  "application/octet-stream")))
+    (process-send-string proc
+      (with-temp-buffer
+        (insert-file-contents-literally path)
+        (ws-response-header proc 200
+          (cons "Content-type" mime)
+          (cons "Content-length" (- (point-max) (point-min))))
+        (buffer-string)))))
+
+(defun ws-send-directory-list (proc directory &optional match)
+  "Send a listing of files in DIRECTORY to PROC.
+Optional argument MATCH is passed to `directory-files' and may be
+used to limit the files sent."
+  (ws-response-header proc 200 (cons "Content-type" "text/html"))
+  (process-send-string proc
+    (concat "<ul>"
+            (mapconcat (lambda (f)
+                         (let* ((full (expand-file-name f directory))
+                                (end (if (file-directory-p full) "/" ""))
+                                (url (url-encode-url (concat f end))))
+                           (format "<li><a href=%s>%s</li>" url f)))
+                       (directory-files directory nil match)
+                       "\n")
+            "</ul>")))
+
+(defun ws-in-directory-p (parent path)
+  "Check if PATH is under the PARENT directory.
+If so return PATH, if not return nil.  Note: the PARENT directory
+must be full expanded as with `expand-file-name' and should not
+contain e.g., \"~\" for a user home directory."
+  (if (zerop (length path))
+      parent
+    (let ((expanded (expand-file-name path parent)))
+      (and (>= (length expanded) (length parent))
+           (string= parent (substring expanded 0 (length parent)))
+           expanded))))
+
+(defun ws-with-authentication (handler credentials
+                                       &optional realm unauth invalid)
+  "Return a version of HANDLER protected by CREDENTIALS.
+HANDLER should be a function as passed to `ws-start', and
+CREDENTIALS should be an alist of elements of the form (USERNAME
+. PASSWORD).
+
+Optional argument REALM sets the realm in the authentication
+challenge.  Optional arguments UNAUTH and INVALID should be
+functions which are called on the request when no authentication
+information, or invalid authentication information are provided
+respectively."
+  (let ((handler handler)
+        (credentials credentials)
+        (realm realm)
+        (unauth unauth)
+        (invalid invalid))
+    (lambda (request)
+      (with-slots (process headers) request
+        (let ((auth (cddr (assoc :AUTHORIZATION headers))))
+          (cond
+           ;; no authentication information provided
+           ((not auth)
+            (if unauth
+                (funcall unauth request)
+              (ws-response-header process 401
+                (cons "WWW-Authenticate"
+                      (format "Basic realm=%S" (or realm "restricted")))
+                '("Content-type" . "text/plain"))
+              (process-send-string process "authentication required")))
+           ;; valid authentication information
+           ((string= (cdr auth) (cdr (assoc (car auth) credentials)))
+            (funcall handler request))
+           ;; invalid authentication information
+           (t
+            (if invalid
+                (funcall invalid request)
+              (ws-response-header process 403 '("Content-type" . "text/plain"))
+              (process-send-string process "invalid credentials")))))))))
+
+(defun ws-web-socket-handshake (key)
+  "Perform the handshake defined in RFC6455."
+  (base64-encode-string (sha1 (concat (ws-trim key) ws-guid) nil nil 'binary)))
+
+;;; Enable the old accessors without the `ws-' namespace as obsolete.
+;;; Lets plan to remove these within a year of the date they were
+;;; marked obsolete, so that would be roughly 2021-03-12.
+(define-obsolete-function-alias 'active 'ws-active "2020-03-12")
+(define-obsolete-function-alias 'body 'ws-body "2020-03-12")
+(define-obsolete-function-alias 'boundary 'ws-boundary "2020-03-12")
+(define-obsolete-function-alias 'context 'ws-context "2020-03-12")
+(define-obsolete-function-alias 'data 'ws-data "2020-03-12")
+(define-obsolete-function-alias 'handler 'ws-handler "2020-03-12")
+(define-obsolete-function-alias 'handlers 'ws-handlers "2020-03-12")
+(define-obsolete-function-alias 'headers 'ws-headers "2020-03-12")
+(define-obsolete-function-alias 'index 'ws-index "2020-03-12")
+(define-obsolete-function-alias 'new 'ws-new "2020-03-12")
+(define-obsolete-function-alias 'pending 'ws-pending "2020-03-12")
+(define-obsolete-function-alias 'port 'ws-port "2020-03-12")
+(define-obsolete-function-alias 'process 'ws-process "2020-03-12")
+(define-obsolete-function-alias 'requests 'ws-requests "2020-03-12")
+
+(provide 'web-server)
+;;; web-server.el ends here
diff --git a/org/elpa/web-server-20210708.2242/web-server.info b/org/elpa/web-server-20210708.2242/web-server.info
new file mode 100644
index 0000000..3bbb2ad
--- /dev/null
+++ b/org/elpa/web-server-20210708.2242/web-server.info
@@ -0,0 +1,2106 @@
+This is web-server.info, produced by makeinfo version 6.7 from
+web-server.texi.
+
+This file documents the Emacs Web Server (web-server)
+
+   Copyright (C) 2013 Eric Schulte <schulte.eric@gmail.com>
+
+     Permission is granted to copy, distribute and/or modify this
+     document under the terms of the GNU Free Documentation License,
+     Version 1.3 or any later version published by the Free Software
+     Foundation; with the Invariant Section being “GNU GENERAL PUBLIC
+     LICENSE,” A copy of the license is included in the section entitled
+     “GNU Free Documentation License.”
+INFO-DIR-SECTION Emacs
+START-INFO-DIR-ENTRY
+* Web Server: (web-server).     Web Server for Emacs.
+END-INFO-DIR-ENTRY
+
+
+File: web-server.info,  Node: Top,  Next: Introduction,  Prev: (dir),  Up: (dir)
+
+Emacs Web Server User Manual
+****************************
+
+This file documents the Emacs Web Server (web-server)
+
+   Copyright (C) 2013 Eric Schulte <schulte.eric@gmail.com>
+
+     Permission is granted to copy, distribute and/or modify this
+     document under the terms of the GNU Free Documentation License,
+     Version 1.3 or any later version published by the Free Software
+     Foundation; with the Invariant Section being “GNU GENERAL PUBLIC
+     LICENSE,” A copy of the license is included in the section entitled
+     “GNU Free Documentation License.”
+
+* Menu:
+
+* Introduction::                Overview of the Emacs Web Server
+* Handlers::                    Handlers respond to HTTP requests
+* Requests::                    Getting information on HTTP requests
+* Usage Examples::              Examples demonstrating usage
+* Function Index::              List of Functions
+
+Appendices
+
+* Copying::                     The GNU General Public License gives
+                                you permission to redistribute GNU Emacs on
+                                certain terms; it also explains that there is
+                                no warranty.
+* GNU Free Documentation License::  The license for this documentation.
+* Index::                       Complete index.
+
+
+
+
+
+File: web-server.info,  Node: Introduction,  Next: Handlers,  Prev: Top,  Up: Top
+
+1 Introduction
+**************
+
+The Emacs Web Server is a Web server implemented entirely in Emacs Lisp.
+HTTP requests are matched to handlers (*note Handlers::) which are Emacs
+Lisp functions.  Handlers receive as their only argument a request
+object (*note Requests::) which holds information about the request and
+a process holding the HTTP network connection.  Handlers write their
+responses directly to the network process.
+
+   A number of examples (*note Usage Examples::) demonstrate usage of
+the Emacs Web Server.  All public functions of the Emacs Web Server are
+listed (*note Function Index::).
+
+
+File: web-server.info,  Node: Handlers,  Next: Requests,  Prev: Handlers,  Up: Top
+
+2 Handlers
+**********
+
+The function ‘ws-start’ takes takes two arguments ‘handlers’ and ‘port’.
+It starts a server listening on ‘port’ responding to requests with
+‘handlers’.  ‘Handlers’ may be either a single function or an
+association list composed of pairs of matchers and handler functions.
+When ‘handlers’ is a single function the given function is used to serve
+every request, when it is an association list, the function of the first
+matcher to match each request handles that request.
+
+2.1 Matchers
+============
+
+Matchers may be a regular expression or a function.  Regular expression
+matchers consists of an HTTP header and a regular expression.  When the
+regular expression matches the content of the given header the matcher
+succeeds and the associated handler is called.  For example the
+following matches any ‘GET’ request whose path starts with the substring
+“foo”.
+
+     (:GET . "^foo")
+
+   A function matcher is a function which takes the request object
+(*note Requests::) and succeeds when the function returns a non-nil
+value.  For example the following matcher matches every request,
+
+     (lambda (_) t)
+
+   and the following matches only requests in which the supplied
+“number” parameter is odd.
+
+     (lambda (request)
+       (oddp (string-to-number (cdr (assoc "number" request)))))
+
+2.2 Handler Function
+====================
+
+Each handler is a function which takes a request object (*note
+Requests::) as its only argument.  The function may respond to the
+request by writing to the network process held in the ‘process’ field of
+the request object.  For example, the ‘process-send-string’ function may
+be used to write string data to a request as in the following.
+
+       (process-send-string (process request) "hello world")
+
+   When the handler function exits the connection is terminated unless
+the handler function returns the keyword ‘:keep-alive’.
+
+
+File: web-server.info,  Node: Requests,  Next: Usage Examples,  Prev: Handlers,  Up: Top
+
+3 Requests
+**********
+
+Each HTTP requests is represented using a ‘ws-request’ object (*note
+ws-request::).  The request object serves two purposes, one internal and
+one external.  Internally, request objects are used to hold state while
+HTTP headers are parsed incrementally as the HTTP request text is
+received from the network.  Externally, request objects are used to
+decide which handler to call, and are then passed as the only argument
+to the called handler.
+
+   In addition to fields used internally, each ‘ws-request’ object holds
+the network process in the ‘process’ and holds all HTTP headers and
+request GET or POST parameters in the ‘headers’ alist.  HTML Headers are
+keyed using uppercase keywords (e.g., ‘:GET’), and user supplied
+parameters are keyed using the string name of the parameter.
+
+   The ‘process’ field may be used by handlers to send data to a client
+as in the following example.
+
+     (process-send-string (process request) "hello world")
+
+   The ‘headers’ field may be used to access request information such as
+the requested path,
+
+     (cdr (assoc :GET (headers request)))
+
+   or named parameters as from a web form.
+
+     (cdr (assoc "message" (headers request)))
+
+
+File: web-server.info,  Node: Usage Examples,  Next: Hello World,  Prev: Requests,  Up: Top
+
+4 Usage Examples
+****************
+
+These examples demonstrate usage.
+* Menu:
+
+* Hello World::                 Serve “Hello World” to every request
+* Hello World UTF8::            Serve “Hello World” w/UTF8 encoding
+* Hello World HTML::            Serve “Hello World” in HTML
+* File Server::                 Serve files from a document root
+* URL Parameter Echo::          Echo parameters from a URL query string
+* POST Echo::                   Echo POST parameters back
+* Basic Authentication::        BASIC HTTP authentication
+* Org-mode Export::             Export files to HTML and Tex
+* File Upload::                 Upload files and return their sha1sum
+* Web Socket::                  Web socket echo server
+* Gzipped Transfer Encoding::   Gzip content encoding
+* Chunked Transfer Encoding::   Chunked transfer encoding
+
+
+File: web-server.info,  Node: Hello World,  Next: Hello World UTF8,  Prev: Usage Examples,  Up: Usage Examples
+
+4.1 Hello World
+===============
+
+The simplest possible “hello world” example.  The handler consists of a
+single (matcher .  handler) pair.  The function matcher matches _every_
+incoming HTTP request.  The handler responds by setting the content type
+to ‘text/plain’, and then sending the string “hello world”.  When the
+handler exits the network connection of the request is closed.
+
+;;; hello-world.el --- simple hello world server using Emacs Web Server
+;; Copyright (C) 2014  Free Software Foundation, Inc.
+
+(ws-start
+ (lambda (request)
+   (with-slots (process headers) request
+     (ws-response-header process 200 '("Content-type" . "text/plain"))
+     (process-send-string process "hello world")))
+ 9000)
+
+
+File: web-server.info,  Node: Hello World UTF8,  Next: Hello World HTML,  Prev: Hello World,  Up: Usage Examples
+
+4.2 Hello World UTF8
+====================
+
+This example only differs from the previous in that the “Content-type”
+indicates UTF8 encoded data, and the hello world sent is selected at
+random from a list of different languages.
+
+;;; hello-world-utf8.el --- utf8 hello world server using Emacs Web Server
+;; Copyright (C) 2014  Free Software Foundation, Inc.
+
+(ws-start
+ (lambda (request)
+   (with-slots (process headers) request
+     (let ((hellos '("こんにちは"
+                     "안녕하세요"
+                     "góðan dag"
+                     "Grüßgott"
+                     "hyvää päivää"
+                     "yá'át'ééh"
+                     "Γεια σας"
+                     "Вiтаю"
+                     "გამარჯობა"
+                     "नमस्ते"
+                     "你好")))
+       (ws-response-header process 200
+         '("Content-type" . "text/plain; charset=utf-8"))
+       (process-send-string process
+         (concat (nth (random (length hellos)) hellos) " world")))))
+ 9001)
+
+
+File: web-server.info,  Node: Hello World HTML,  Next: File Server,  Prev: Hello World UTF8,  Up: Usage Examples
+
+4.3 Hello World HTML
+====================
+
+;;; hello-world-html.el --- html hello world server using Emacs Web Server
+;; Copyright (C) 2014  Free Software Foundation, Inc.
+
+(ws-start
+ (lambda (request)
+   (with-slots (process headers) request
+     (ws-response-header process 200 '("Content-type" . "text/html"))
+     (process-send-string process "<html>
+  <head>
+    <title>Hello World</title>
+  </head>
+  <body>
+    <b>hello world</b>
+  </body>
+</html>")))
+ 9002)
+
+   This variation of the “hello world” example sends a ‘text/html’
+response instead of a simple ‘text/plain’ response.
+
+
+File: web-server.info,  Node: File Server,  Next: URL Parameter Echo,  Prev: Hello World HTML,  Up: Usage Examples
+
+4.4 File Server
+===============
+
+The following example implements a file server which will serve files
+from the ‘docroot’ document root set to the current working directory in
+this example.  Four helper functions are used; ‘ws-in-directory-p’ is
+used to check if the requested path is within the document root.  If not
+then ‘ws-send-404’ is used to send a default “File Not Found”.  If so
+then the file is served with ‘ws-send-file’ (which appropriately sets
+the mime-type of the response based on the extension of the file) if it
+is a file or is served with ‘ws-send-directory-list’ if it is a
+directory.
+
+;;; file-server.el --- serve any files using Emacs Web Server
+;; Copyright (C) 2014  Free Software Foundation, Inc.
+
+(lexical-let ((docroot default-directory))
+  (ws-start
+   (lambda (request)
+     (with-slots (process headers) request
+       (let ((path (substring (cdr (assoc :GET headers)) 1)))
+         (if (ws-in-directory-p docroot path)
+             (if (file-directory-p path)
+                 (ws-send-directory-list process
+                   (expand-file-name path docroot) "^[^\.]")
+               (ws-send-file process (expand-file-name path docroot)))
+           (ws-send-404 process)))))
+   9003))
+
+
+File: web-server.info,  Node: URL Parameter Echo,  Next: POST Echo,  Prev: File Server,  Up: Usage Examples
+
+4.5 URL Parameter Echo
+======================
+
+This example demonstrates access of URL-encoded parameters in a ‘GET’
+request.  For example the following URL
+<http://localhost:9005/example?foo=bar&baz=qux> will render as the
+following HTML table.
+
+foo                                  bar
+baz                                  qux
+
+;;; url-param-echo.el --- echo back url-paramed message using Emacs Web Server
+;; Copyright (C) 2014  Free Software Foundation, Inc.
+
+(ws-start
+ '(((:GET . ".*") .
+    (lambda (request)
+      (with-slots (process headers) request
+        (ws-response-header process 200 '("Content-type" . "text/html"))
+        (process-send-string process
+          (concat "URL Parameters:</br><table><tr>"
+                  (mapconcat (lambda (pair)
+                               (format "<th>%s</th><td>%s</td>"
+                                       (car pair) (cdr pair)))
+                             (cl-remove-if-not (lambda (el) (stringp (car el)))
+                                               headers)
+                             "</tr><tr>")
+                  "</tr></table>"))))))
+ 9004)
+
+
+File: web-server.info,  Node: POST Echo,  Next: Basic Authentication,  Prev: URL Parameter Echo,  Up: Usage Examples
+
+4.6 POST Echo
+=============
+
+The following example echos back the content of the “message” field in a
+‘POST’ request.
+
+;;; post-echo.el --- echo back posted message using Emacs Web Server
+;; Copyright (C) 2014  Free Software Foundation, Inc.
+
+(ws-start
+ '(((:POST . ".*") .
+    (lambda (request)
+      (with-slots (process headers) request
+        (let ((message (cdr (assoc "message" headers))))
+          (ws-response-header process 200 '("Content-type" . "text/plain"))
+          (process-send-string process
+            (if message
+                (format "you said %S\n" (cdr (assoc 'content message)))
+              "This is a POST request, but it has no \"message\".\n"))))))
+   ((:GET . ".*") .
+    (lambda (request)
+      (with-slots (process) request
+        (ws-response-header process 200 '("Content-type" . "text/plain"))
+        (process-send-string process
+          "This is a GET request not a POST request.\n")))))
+ 9005)
+
+
+File: web-server.info,  Node: Basic Authentication,  Next: Org-mode Export,  Prev: POST Echo,  Up: Usage Examples
+
+4.7 Basic Authentication
+========================
+
+The following example demonstrates BASIC HTTP authentication.  The
+handler prompts an unauthenticated client for authentication by sending
+a “WWW-Authenticate” header.
+
+     (ws-response-header process 401
+       '("WWW-Authenticate" . "Basic realm=\"example\"")
+       '("Content-type" . "text/plain"))
+
+   The client replies by setting the “Authorization” HTTP header which
+is parsed into a list of the form ‘(PROTOCOL USERNAME . PASSWORD)’.
+Currently only BASIC HTTP authentication is supported.
+
+Note: BASIC HTTP authentication passes user credentials in plain text
+between the client and the server and should generally only be used with
+HTTPS network encryption.  While the Emacs web server currently doesn’t
+support HTTPS network encryption it may be run behind an HTTPS proxy
+server (e.g., Apache or Nginx) with HTTPS support.
+
+;;; basic-authentication.el --- basic authentication
+;; Copyright (C) 2014  Free Software Foundation, Inc.
+
+(lexical-let ((users '(("foo" . "bar")
+                       ("baz" . "qux"))))
+  (ws-start
+   (ws-with-authentication
+    (lambda (request)
+      (with-slots (process headers) request
+        (let ((user (caddr (assoc :AUTHORIZATION headers))))
+          (ws-response-header process 200 '("Content-type" . "text/plain"))
+          (process-send-string process (format "welcome %s" user)))))
+    users)
+   9006))
+
+
+File: web-server.info,  Node: Org-mode Export,  Next: File Upload,  Prev: Basic Authentication,  Up: Usage Examples
+
+4.8 Org-mode Export
+===================
+
+The following example exports a directory of Org-mode files as either
+text, HTML or LaTeX. The Org-mode export engine is used to export files
+on-demand as they are requested.
+
+;;; org-mode-file-server.el --- serve on-demand exported Org-mode files
+;; Copyright (C) 2014  Free Software Foundation, Inc.
+
+(lexical-let ((docroot "/tmp/"))
+  (ws-start
+   (lambda (request)
+     (with-slots (process headers) request
+       (let ((path (ws-in-directory-p ; check if path is in docroot
+                    docroot (substring (cdr (assoc :GET headers)) 1))))
+         (unless path (ws-send-404 process)) ; send 404 if not in docroot
+         (if (file-directory-p path)
+             (progn ;; send directory listing, convert org files to html/tex/txt
+               (ws-response-header proc 200 (cons "Content-type" "text/html"))
+               (process-send-string proc
+                 (concat "<ul>"
+                         (mapconcat
+                          (lambda (f)
+                            (let* ((full (expand-file-name f path))
+                                   (end (if (file-directory-p full) "/" ""))
+                                   (url (url-encode-url (concat f end))))
+                              (format "<li><a href=%s>%s</li>" url f)))
+                          (apply #'append
+                                 (mapcar
+                                  (lambda (f)
+                                    (list (concat f ".txt")
+                                          (concat f ".tex")
+                                          (concat f ".html")))
+                                  (mapcar #'file-name-sans-extension
+                                          (directory-files path nil
+                                                           "^[^\.].*org$"))))
+                          "\n") "</ul>")))
+           ;; Export the file as requested and return the result
+           (let* ((base (file-name-sans-extension path))
+                  (type (case (intern (downcase (file-name-extension path)))
+                          (html 'html)
+                          (tex  'latex)
+                          (txt  'ascii)
+                          (t (ws-error process "%S export not supported"
+                                       (file-name-extension path)))))
+                  (orig (concat base ".org")))
+             (unless (file-exists-p orig) (ws-send-404 process))
+             (save-window-excursion (find-file orig)
+                                    (org-export-to-file type path))
+             (ws-send-file process path))))))
+   9007))
+
+
+File: web-server.info,  Node: File Upload,  Next: Web Socket,  Prev: Org-mode Export,  Up: Usage Examples
+
+4.9 File Upload
+===============
+
+The following example demonstrates accessing an uploaded file.  This
+simple server accesses the file named “file” and returns it’s sha1sum
+and file name.
+
+;;; file-upload.el --- use an uploaded file
+;; Copyright (C) 2014  Free Software Foundation, Inc.
+
+(ws-start
+ '(((:POST . ".*") .
+    (lambda (request)
+      (with-slots (process headers) request
+        (ws-response-header process 200 '("Content-type" . "text/plain"))
+        (let ((file (cdr (assoc "file" headers))))
+          (process-send-string process
+            (concat (sha1 (cdr (assoc 'content file))) "  "
+                    (cdr (assoc 'filename file)) "\n")))))))
+ 9008)
+
+   A file may be uploaded from an HTML form, or using the ‘curl’ program
+as in the following example.
+
+     $ curl -s -F file=usr/share/emacs/24.3/etc/COPYING localhost:9008
+     8624bcdae55baeef00cd11d5dfcfa60f68710a02  COPYING
+     $ sha1sum /usr/share/emacs/24.3/etc/COPYING
+     8624bcdae55baeef00cd11d5dfcfa60f68710a02  /usr/share/emacs/24.3/etc/COPYING
+
+
+File: web-server.info,  Node: Web Socket,  Next: Chunked Transfer Encoding,  Prev: File Upload,  Up: Usage Examples
+
+4.10 Web Socket
+===============
+
+Example demonstrating the use of web sockets for full duplex
+communication between clients and the server.  Handlers may use the
+‘ws-web-socket-connect’ function (*note ws-web-socket-connect::) to
+check for and respond to a web socket upgrade request sent by the client
+(as demonstrated with the ‘new WebSocket’ JavaScript code in the
+example).  Upon successfully initializing a web socket connection the
+call to ‘ws-web-socket-connect’ will return the web socket network
+process.  This process may then be used by the server to communicate
+with the client over the web socket using the ‘process-send-string’ and
+‘ws-web-socket-frame’ functions.  All web socket communication must be
+wrapped in frames using the ‘ws-web-socket-frame’ function.
+
+   The handler must pass a function as the second argument to
+‘ws-web-socket-connect’.  This function will be called on every web
+socket message received from the client.
+
+Note: in order to keep the web socket connection alive the request
+handler from which ‘ws-web-socket-connect’ is called must return the
+‘:keep-alive’ keyword, as demonstrated in the example.
+
+;;; web-sockets.el --- communicate via web-sockets
+;; Copyright (C) 2014  Free Software Foundation, Inc.
+
+(lexical-let* ((web-socket-port 9009)
+               (web-socket-page
+                (format "<html>
+<head>
+<script type=\"text/javascript\">
+var ws;
+function connect(){
+  ws = new WebSocket(\"ws://localhost:%d/\");
+
+  ws.onopen    = function()    { alert(\"connected\"); };
+  ws.onmessage = function(msg) { alert(\"server: \" + msg.data); };
+  ws.onclose   = function()    { alert(\"connection closed\"); };
+}
+
+function message(){ ws.send(\"foo\"); }
+
+function close(){ ws.close(); };
+</script>
+</head>
+<body>
+<ol>
+
+<li>Press \"connect\" to initialize the web socket connection to
+    the server.  The server will complete the web socket
+    handshake at which point you'll see an alert with the text
+    \"connected\".</li>
+
+<li>Press \"message\" to send the string \"foo\" to the server.
+    The server will reply with the text \"you said: foo\" which
+    you will see in an alert as \"server: you said: foo\".</li>
+
+<li>Press \"close\" to close the connection.  After the server
+    responds with a close frame you will see an alert with the
+    text \"connection closed\".</li>
+
+</ol>
+<a href=\"javascript:connect()\">connect</a>
+<a href=\"javascript:message()\">message</a>
+<a href=\"javascript:close()\">close</a>
+</body>
+</html>" web-socket-port)))
+  (ws-start
+   (lambda (request)
+     (with-slots (process headers) request
+       ;; if a web-socket request, then connect and keep open
+       (if (ws-web-socket-connect request
+             (lambda (proc string)
+               (process-send-string proc
+                 (ws-web-socket-frame (concat "you said: " string)))))
+           (prog1 :keep-alive (setq my-connection process))
+         ;; otherwise send the index page
+         (ws-response-header process 200 '("Content-type" . "text/html"))
+         (process-send-string process web-socket-page))))
+   web-socket-port))
+
+
+File: web-server.info,  Node: Gzipped Transfer Encoding,  Next: Chunked Transfer Encoding,  Prev: Web Socket,  Up: Usage Examples
+
+4.11 Gzipped Transfer Encoding
+==============================
+
+HTTP Responses may be compressed by setting the “gzip” (or “compress” or
+“deflate”) content- or transfer-encoding HTTP headers in
+‘ws-response-header’.  Any further data sent to the process using
+‘ws-send’ will automatically be appropriately compressed.
+
+;;; content-encoding-gzip.el -- gzip content encoding
+;; Copyright (C) 2014  Free Software Foundation, Inc.
+
+(ws-start
+ (lambda (request)
+   (with-slots (process headers) request
+     (ws-response-header process 200
+       '("Content-type" . "text/plain; charset=utf-8")
+       '("Content-Encoding" . "x-gzip"))
+     (let ((s "Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Donec
+hendrerit tempor tellus. Donec pretium posuere tellus. Proin quam
+nisl, tincidunt et, mattis eget, convallis nec, purus. Cum sociis
+natoque penatibus et magnis dis parturient montes, nascetur
+ridiculus mus. Nulla posuere. Donec vitae dolor. Nullam tristique
+diam non turpis. Cras placerat accumsan nulla. Nullam rutrum. Nam
+vestibulum accumsan nisl.
+
+Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Donec
+hendrerit tempor tellus. Donec pretium posuere tellus. Proin quam
+nisl, tincidunt et, mattis eget, convallis nec, purus. Cum sociis
+natoque penatibus et magnis dis parturient montes, nascetur
+ridiculus mus. Nulla posuere. Donec vitae dolor. Nullam tristique
+diam non turpis. Cras placerat accumsan nulla. Nullam rutrum. Nam
+vestibulum accumsan nisl."))
+       (ws-send process s))))
+ 9016)
+
+
+File: web-server.info,  Node: Chunked Transfer Encoding,  Next: Function Index,  Prev: Web Socket,  Up: Usage Examples
+
+4.12 Chunked Transfer Encoding
+==============================
+
+Similarly, HTTP Responses may be sent using the “chunked” transfer
+encoding by passing the appropriate HTTP header to ‘ws-response-header’.
+Any further data sent to the process using ‘ws-send’ will automatically
+be appropriately encoded for chunked transfer.
+
+;;; transfer-encoding-chunked.el -- chunked transfer encoding
+;; Copyright (C) 2014  Free Software Foundation, Inc.
+
+(ws-start
+ (lambda (request)
+   (let ((s "
+Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Donec
+hendrerit tempor tellus. Donec pretium posuere tellus. Proin quam
+nisl, tincidunt et, mattis eget, convallis nec, purus. Cum sociis
+natoque penatibus et magnis dis parturient montes, nascetur
+ridiculus mus. Nulla posuere. Donec vitae dolor. Nullam tristique
+diam non turpis. Cras placerat accumsan nulla. Nullam rutrum. Nam
+vestibulum accumsan nisl.
+
+Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Donec
+hendrerit tempor tellus. Donec pretium posuere tellus. Proin quam
+nisl, tincidunt et, mattis eget, convallis nec, purus. Cum sociis
+natoque penatibus et magnis dis parturient montes, nascetur
+ridiculus mus. Nulla posuere. Donec vitae dolor. Nullam tristique
+diam non turpis. Cras placerat accumsan nulla. Nullam rutrum. Nam
+vestibulum accumsan nisl.
+"))
+     (with-slots (process headers) request
+       (ws-response-header process 200
+         '("Content-type" . "text/plain; charset=utf-8")
+         '("Transfer-Encoding" . "chunked"))
+       (ws-send process s) (sit-for 0.5)
+       (ws-send process s) (sit-for 0.5)
+       (ws-send process s) (sit-for 0.5)
+       (ws-send process s))))
+ 9017)
+
+
+File: web-server.info,  Node: Function Index,  Next: Copying,  Prev: Usage Examples,  Up: Top
+
+5 Function Index
+****************
+
+The following functions implement the Emacs Web Server public API.
+
+5.1 Objects
+===========
+
+The following objects represent web servers and requests.
+
+ -- Class: ws-server handlers process port requests
+     Every Emacs web server is an instance of the ‘ws-server’ class.
+     Each instance includes the ‘handlers’ association list and ‘port’
+     passed to ‘ws-start’, as well as the server network ‘process’ and a
+     list of all active ‘requests’.
+
+ -- Class: ws-request process pending context boundary index active
+          headers
+     The ‘ws-request’ class represents an active web request.  The
+     ‘process’ field holds the network process of the client and may be
+     used by handlers to respond to requests.  The ‘headers’ field holds
+     an alist of information on the request for use by handlers.  The
+     remaining ‘pending’, ‘context’, ‘boundary’, ‘index’ and ‘active’
+     fields are used to maintain header parsing information across calls
+     to the ‘ws-filter’ function.
+
+5.2 Starting and Stopping Servers
+=================================
+
+The following functions start and stop Emacs web servers.  The
+‘ws-servers’ list holds all running servers.
+
+ -- Function: ws-start handlers port &optional log-buffer &rest
+          network-args
+     ‘ws-start’ starts a server listening on ‘port’ using ‘handlers’
+     (*note Handlers::) to match and respond to requests.  An instance
+     of the ‘ws-server’ class is returned.
+
+ -- Variable: ws-servers
+     The ‘ws-servers’ list holds all active Emacs web servers.
+
+ -- Function: ws-stop server
+     ‘ws-stop’ stops ‘server’ deletes all related processes, and frees
+     the server’s port.  Evaluate the following to stop all emacs web
+     servers.
+          (mapc #'ws-stop ws-servers)
+
+ -- Function: ws-stop-all
+     ‘ws-stop-all’ stops all emacs web servers by mapping ‘ws-stop’ over
+     ‘ws-servers’.
+
+5.3 Convenience Functions
+=========================
+
+The following convenience functions automate many common tasks
+associated with responding to HTTP requests.
+
+ -- Function: ws-response-header process code &rest headers
+     Send the headers required to start an HTTP response to ‘proc’.
+     ‘proc’ should be a ‘ws-request’ ‘proc’ of an active request.
+
+     For example start a standard 200 “OK” HTML response with the
+     following.
+
+          (ws-response-header process 200 '("Content-type" . "text/html"))
+
+     The encoding may optionally be set in the HTTP header.  Send a UTF8
+     encoded response with the following.
+
+          (ws-response-header process 200
+                      '("Content-type" . "text/plain; charset=utf-8"))
+
+     Additionally, when “Content-Encoding” or “Transfer-Encoding”
+     headers are supplied any subsequent data written to ‘proc’ using
+     ‘ws-send’ will be encoded appropriately including sending the
+     appropriate data upon the end of transmission for chunked transfer
+     encoding.
+
+     For example with the header ‘("Content-Encoding" . "gzip")’, any
+     data subsequently written to ‘proc’ using ‘ws-send’ will be
+     compressed using the command specified in ‘ws-gzip-cmd’.  See *note
+     Gzipped Transfer Encoding:: and *note Chunked Transfer Encoding::
+     for more complete examples.
+
+ -- Function: ws-send proc string
+     Send ‘string’ to process ‘proc’.  If any Content or Transfer
+     encodings are in use, apply them to ‘string’ before sending.
+
+ -- Function: ws-send-500 process &rest msg-and-args
+     ‘ws-send-500’ sends a default 500 “Internal Server Error” response
+     to ‘process’.
+
+ -- Function: ws-send-404 process &rest msg-and-args
+     ‘ws-send-500’ sends a default 404 “File Not Found” response to
+     ‘process’.
+
+ -- Function: ws-send-file process path &optional mime-type
+     ‘ws-send-file’ sends the file located at ‘path’ to ‘process’.  If
+     the optional ‘mime-type’ is not set, then the mime-type is
+     determined by calling ‘mm-default-file-encoding’ on ‘path’ or is
+     set to “application/octet-stream” if no mime-type can be
+     determined.
+
+ -- Function: ws-send-directory-list process directory &optional match
+     ‘ws-send-directory-list’ sends the a listing of the files located
+     in ‘directory’ to ‘process’.  The list is sent as an HTML list of
+     links to the files.  Optional argument ‘match’ may be set to a
+     regular expression, in which case only those files that match are
+     listed.
+
+ -- Function: ws-in-directory-p parent path
+     Check if ‘path’ is under the ‘parent’ directory.
+
+          (ws-in-directory-p "/tmp/" "pics")
+              ⇒ "/tmp/pics"
+
+          (ws-in-directory-p "/tmp/" "..")
+              ⇒ nil
+
+          (ws-in-directory-p "/tmp/" "~/pics")
+              ⇒ nil
+
+ -- Function: ws-with-authentication handler credentials &optional realm
+          unauth invalid
+     Return a version of ‘handler’ which is protected by ‘credentials’.
+     Handler should be a normal handler function (*note Handlers::) and
+     ‘credentials’ should be an association list of usernames and
+     passwords.
+
+     For example, a server running the following handlers,
+
+          (list (cons '(:GET  . ".*") 'view-handler)
+                (cons '(:POST . ".*") 'edit-handler))
+
+     could have authorization added by changing the handlers to the
+     following.
+
+          (list (cons '(:GET  . ".*") view-handler)
+                (cons '(:POST . ".*") (ws-with-authentication
+                                       'org-ehtml-edit-handler
+                                       '(("admin" . "password")))))
+
+ -- Function: ws-web-socket-connect request handler
+     If ‘request’ is a web socket upgrade request (indicated by the
+     presence of the ‘:SEC-WEBSOCKET-KEY’ header argument) establish a
+     web socket connection to the client.  Call ‘handler’ on web socket
+     messages received from the client.
+
+          (ws-web-socket-connect request
+            (lambda (proc string)
+              (process-send-string proc
+                (ws-web-socket-frame (concat "you said: " string)))))
+              ⇒ #<process ws-server <127.0.0.1:34921>>
+
+5.4 Customization Variables
+===========================
+
+The following variables may be changed to control the behavior of the
+web server.  Specifically the ‘ws-*-cmd’ variables specify the command
+lines used to compress data according to content and or transfer
+encoding HTTP headers passed to *note ws-response-header::.
+
+ -- Variable: ws-compress-cmd
+     Command used for the “compress” Content or Transfer coding.
+
+ -- Variable: ws-deflate-cmd
+     Command used for the “deflate” Content or Transfer coding.
+
+ -- Variable: ws-gzip-cmd
+     Command used for the “gzip” Content or Transfer coding.
+
+
+File: web-server.info,  Node: Copying,  Next: GNU Free Documentation License,  Prev: Function Index,  Up: Top
+
+Appendix A GNU GENERAL PUBLIC LICENSE
+*************************************
+
+                        Version 3, 29 June 2007
+
+     Copyright © 2007 Free Software Foundation, Inc. <http://fsf.org/>
+
+     Everyone is permitted to copy and distribute verbatim copies of this
+     license document, but changing it is not allowed.
+
+Preamble
+========
+
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+     receiving the covered work authorizing them to use, propagate,
+     modify or convey a specific copy of the covered work, then the
+     patent license you grant is automatically extended to all
+     recipients of the covered work and works based on it.
+
+     A patent license is “discriminatory” if it does not include within
+     the scope of its coverage, prohibits the exercise of, or is
+     conditioned on the non-exercise of one or more of the rights that
+     are specifically granted under this License.  You may not convey a
+     covered work if you are a party to an arrangement with a third
+     party that is in the business of distributing software, under which
+     you make payment to the third party based on the extent of your
+     activity of conveying the work, and under which the third party
+     grants, to any of the parties who would receive the covered work
+     from you, a discriminatory patent license (a) in connection with
+     copies of the covered work conveyed by you (or copies made from
+     those copies), or (b) primarily for and in connection with specific
+     products or compilations that contain the covered work, unless you
+     entered into that arrangement, or that patent license was granted,
+     prior to 28 March 2007.
+
+     Nothing in this License shall be construed as excluding or limiting
+     any implied license or other defenses to infringement that may
+     otherwise be available to you under applicable patent law.
+
+  12. No Surrender of Others’ Freedom.
+
+     If conditions are imposed on you (whether by court order, agreement
+     or otherwise) that contradict the conditions of this License, they
+     do not excuse you from the conditions of this License.  If you
+     cannot convey a covered work so as to satisfy simultaneously your
+     obligations under this License and any other pertinent obligations,
+     then as a consequence you may not convey it at all.  For example,
+     if you agree to terms that obligate you to collect a royalty for
+     further conveying from those to whom you convey the Program, the
+     only way you could satisfy both those terms and this License would
+     be to refrain entirely from conveying the Program.
+
+  13. Use with the GNU Affero General Public License.
+
+     Notwithstanding any other provision of this License, you have
+     permission to link or combine any covered work with a work licensed
+     under version 3 of the GNU Affero General Public License into a
+     single combined work, and to convey the resulting work.  The terms
+     of this License will continue to apply to the part which is the
+     covered work, but the special requirements of the GNU Affero
+     General Public License, section 13, concerning interaction through
+     a network will apply to the combination as such.
+
+  14. Revised Versions of this License.
+
+     The Free Software Foundation may publish revised and/or new
+     versions of the GNU General Public License from time to time.  Such
+     new versions will be similar in spirit to the present version, but
+     may differ in detail to address new problems or concerns.
+
+     Each version is given a distinguishing version number.  If the
+     Program specifies that a certain numbered version of the GNU
+     General Public License “or any later version” applies to it, you
+     have the option of following the terms and conditions either of
+     that numbered version or of any later version published by the Free
+     Software Foundation.  If the Program does not specify a version
+     number of the GNU General Public License, you may choose any
+     version ever published by the Free Software Foundation.
+
+     If the Program specifies that a proxy can decide which future
+     versions of the GNU General Public License can be used, that
+     proxy’s public statement of acceptance of a version permanently
+     authorizes you to choose that version for the Program.
+
+     Later license versions may give you additional or different
+     permissions.  However, no additional obligations are imposed on any
+     author or copyright holder as a result of your choosing to follow a
+     later version.
+
+  15. Disclaimer of Warranty.
+
+     THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
+     APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE
+     COPYRIGHT HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM “AS IS”
+     WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED,
+     INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+     MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE
+     RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU.
+     SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL
+     NECESSARY SERVICING, REPAIR OR CORRECTION.
+
+  16. Limitation of Liability.
+
+     IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN
+     WRITING WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES
+     AND/OR CONVEYS THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR
+     DAMAGES, INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR
+     CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE
+     THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA
+     BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
+     PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER
+     PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF
+     THE POSSIBILITY OF SUCH DAMAGES.
+
+  17. Interpretation of Sections 15 and 16.
+
+     If the disclaimer of warranty and limitation of liability provided
+     above cannot be given local legal effect according to their terms,
+     reviewing courts shall apply local law that most closely
+     approximates an absolute waiver of all civil liability in
+     connection with the Program, unless a warranty or assumption of
+     liability accompanies a copy of the Program in return for a fee.
+
+END OF TERMS AND CONDITIONS
+===========================
+
+How to Apply These Terms to Your New Programs
+=============================================
+
+If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these
+terms.
+
+   To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least the
+“copyright” line and a pointer to where the full notice is found.
+
+     ONE LINE TO GIVE THE PROGRAM'S NAME AND A BRIEF IDEA OF WHAT IT DOES.
+     Copyright (C) YEAR NAME OF AUTHOR
+
+     This program is free software: you can redistribute it and/or modify
+     it under the terms of the GNU General Public License as published by
+     the Free Software Foundation, either version 3 of the License, or (at
+     your option) any later version.
+
+     This program is distributed in the hope that it will be useful, but
+     WITHOUT ANY WARRANTY; without even the implied warranty of
+     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+     General Public License for more details.
+
+     You should have received a copy of the GNU General Public License
+     along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+   Also add information on how to contact you by electronic and paper
+mail.
+
+   If the program does terminal interaction, make it output a short
+notice like this when it starts in an interactive mode:
+
+     PROGRAM Copyright (C) YEAR NAME OF AUTHOR
+     This program comes with ABSOLUTELY NO WARRANTY; for details type ‘show w’.
+     This is free software, and you are welcome to redistribute it
+     under certain conditions; type ‘show c’ for details.
+
+   The hypothetical commands ‘show w’ and ‘show c’ should show the
+appropriate parts of the General Public License.  Of course, your
+program’s commands might be different; for a GUI interface, you would
+use an “about box”.
+
+   You should also get your employer (if you work as a programmer) or
+school, if any, to sign a “copyright disclaimer” for the program, if
+necessary.  For more information on this, and how to apply and follow
+the GNU GPL, see <http://www.gnu.org/licenses/>.
+
+   The GNU General Public License does not permit incorporating your
+program into proprietary programs.  If your program is a subroutine
+library, you may consider it more useful to permit linking proprietary
+applications with the library.  If this is what you want to do, use the
+GNU Lesser General Public License instead of this License.  But first,
+please read <http://www.gnu.org/philosophy/why-not-lgpl.html>.
+
+
+File: web-server.info,  Node: GNU Free Documentation License,  Next: Index,  Prev: Copying,  Up: Top
+
+Appendix B GNU Free Documentation License
+*****************************************
+
+                     Version 1.3, 3 November 2008
+
+     Copyright © 2000, 2001, 2002, 2007, 2008, 2009 Free Software Foundation, Inc.
+     <http://fsf.org/>
+
+     Everyone is permitted to copy and distribute verbatim copies
+     of this license document, but changing it is not allowed.
+
+  0. PREAMBLE
+
+     The purpose of this License is to make a manual, textbook, or other
+     functional and useful document “free” in the sense of freedom: to
+     assure everyone the effective freedom to copy and redistribute it,
+     with or without modifying it, either commercially or
+     noncommercially.  Secondarily, this License preserves for the
+     author and publisher a way to get credit for their work, while not
+     being considered responsible for modifications made by others.
+
+     This License is a kind of “copyleft”, which means that derivative
+     works of the document must themselves be free in the same sense.
+     It complements the GNU General Public License, which is a copyleft
+     license designed for free software.
+
+     We have designed this License in order to use it for manuals for
+     free software, because free software needs free documentation: a
+     free program should come with manuals providing the same freedoms
+     that the software does.  But this License is not limited to
+     software manuals; it can be used for any textual work, regardless
+     of subject matter or whether it is published as a printed book.  We
+     recommend this License principally for works whose purpose is
+     instruction or reference.
+
+  1. APPLICABILITY AND DEFINITIONS
+
+     This License applies to any manual or other work, in any medium,
+     that contains a notice placed by the copyright holder saying it can
+     be distributed under the terms of this License.  Such a notice
+     grants a world-wide, royalty-free license, unlimited in duration,
+     to use that work under the conditions stated herein.  The
+     “Document”, below, refers to any such manual or work.  Any member
+     of the public is a licensee, and is addressed as “you”.  You accept
+     the license if you copy, modify or distribute the work in a way
+     requiring permission under copyright law.
+
+     A “Modified Version” of the Document means any work containing the
+     Document or a portion of it, either copied verbatim, or with
+     modifications and/or translated into another language.
+
+     A “Secondary Section” is a named appendix or a front-matter section
+     of the Document that deals exclusively with the relationship of the
+     publishers or authors of the Document to the Document’s overall
+     subject (or to related matters) and contains nothing that could
+     fall directly within that overall subject.  (Thus, if the Document
+     is in part a textbook of mathematics, a Secondary Section may not
+     explain any mathematics.)  The relationship could be a matter of
+     historical connection with the subject or with related matters, or
+     of legal, commercial, philosophical, ethical or political position
+     regarding them.
+
+     The “Invariant Sections” are certain Secondary Sections whose
+     titles are designated, as being those of Invariant Sections, in the
+     notice that says that the Document is released under this License.
+     If a section does not fit the above definition of Secondary then it
+     is not allowed to be designated as Invariant.  The Document may
+     contain zero Invariant Sections.  If the Document does not identify
+     any Invariant Sections then there are none.
+
+     The “Cover Texts” are certain short passages of text that are
+     listed, as Front-Cover Texts or Back-Cover Texts, in the notice
+     that says that the Document is released under this License.  A
+     Front-Cover Text may be at most 5 words, and a Back-Cover Text may
+     be at most 25 words.
+
+     A “Transparent” copy of the Document means a machine-readable copy,
+     represented in a format whose specification is available to the
+     general public, that is suitable for revising the document
+     straightforwardly with generic text editors or (for images composed
+     of pixels) generic paint programs or (for drawings) some widely
+     available drawing editor, and that is suitable for input to text
+     formatters or for automatic translation to a variety of formats
+     suitable for input to text formatters.  A copy made in an otherwise
+     Transparent file format whose markup, or absence of markup, has
+     been arranged to thwart or discourage subsequent modification by
+     readers is not Transparent.  An image format is not Transparent if
+     used for any substantial amount of text.  A copy that is not
+     “Transparent” is called “Opaque”.
+
+     Examples of suitable formats for Transparent copies include plain
+     ASCII without markup, Texinfo input format, LaTeX input format,
+     SGML or XML using a publicly available DTD, and standard-conforming
+     simple HTML, PostScript or PDF designed for human modification.
+     Examples of transparent image formats include PNG, XCF and JPG.
+     Opaque formats include proprietary formats that can be read and
+     edited only by proprietary word processors, SGML or XML for which
+     the DTD and/or processing tools are not generally available, and
+     the machine-generated HTML, PostScript or PDF produced by some word
+     processors for output purposes only.
+
+     The “Title Page” means, for a printed book, the title page itself,
+     plus such following pages as are needed to hold, legibly, the
+     material this License requires to appear in the title page.  For
+     works in formats which do not have any title page as such, “Title
+     Page” means the text near the most prominent appearance of the
+     work’s title, preceding the beginning of the body of the text.
+
+     The “publisher” means any person or entity that distributes copies
+     of the Document to the public.
+
+     A section “Entitled XYZ” means a named subunit of the Document
+     whose title either is precisely XYZ or contains XYZ in parentheses
+     following text that translates XYZ in another language.  (Here XYZ
+     stands for a specific section name mentioned below, such as
+     “Acknowledgements”, “Dedications”, “Endorsements”, or “History”.)
+     To “Preserve the Title” of such a section when you modify the
+     Document means that it remains a section “Entitled XYZ” according
+     to this definition.
+
+     The Document may include Warranty Disclaimers next to the notice
+     which states that this License applies to the Document.  These
+     Warranty Disclaimers are considered to be included by reference in
+     this License, but only as regards disclaiming warranties: any other
+     implication that these Warranty Disclaimers may have is void and
+     has no effect on the meaning of this License.
+
+  2. VERBATIM COPYING
+
+     You may copy and distribute the Document in any medium, either
+     commercially or noncommercially, provided that this License, the
+     copyright notices, and the license notice saying this License
+     applies to the Document are reproduced in all copies, and that you
+     add no other conditions whatsoever to those of this License.  You
+     may not use technical measures to obstruct or control the reading
+     or further copying of the copies you make or distribute.  However,
+     you may accept compensation in exchange for copies.  If you
+     distribute a large enough number of copies you must also follow the
+     conditions in section 3.
+
+     You may also lend copies, under the same conditions stated above,
+     and you may publicly display copies.
+
+  3. COPYING IN QUANTITY
+
+     If you publish printed copies (or copies in media that commonly
+     have printed covers) of the Document, numbering more than 100, and
+     the Document’s license notice requires Cover Texts, you must
+     enclose the copies in covers that carry, clearly and legibly, all
+     these Cover Texts: Front-Cover Texts on the front cover, and
+     Back-Cover Texts on the back cover.  Both covers must also clearly
+     and legibly identify you as the publisher of these copies.  The
+     front cover must present the full title with all words of the title
+     equally prominent and visible.  You may add other material on the
+     covers in addition.  Copying with changes limited to the covers, as
+     long as they preserve the title of the Document and satisfy these
+     conditions, can be treated as verbatim copying in other respects.
+
+     If the required texts for either cover are too voluminous to fit
+     legibly, you should put the first ones listed (as many as fit
+     reasonably) on the actual cover, and continue the rest onto
+     adjacent pages.
+
+     If you publish or distribute Opaque copies of the Document
+     numbering more than 100, you must either include a machine-readable
+     Transparent copy along with each Opaque copy, or state in or with
+     each Opaque copy a computer-network location from which the general
+     network-using public has access to download using public-standard
+     network protocols a complete Transparent copy of the Document, free
+     of added material.  If you use the latter option, you must take
+     reasonably prudent steps, when you begin distribution of Opaque
+     copies in quantity, to ensure that this Transparent copy will
+     remain thus accessible at the stated location until at least one
+     year after the last time you distribute an Opaque copy (directly or
+     through your agents or retailers) of that edition to the public.
+
+     It is requested, but not required, that you contact the authors of
+     the Document well before redistributing any large number of copies,
+     to give them a chance to provide you with an updated version of the
+     Document.
+
+  4. MODIFICATIONS
+
+     You may copy and distribute a Modified Version of the Document
+     under the conditions of sections 2 and 3 above, provided that you
+     release the Modified Version under precisely this License, with the
+     Modified Version filling the role of the Document, thus licensing
+     distribution and modification of the Modified Version to whoever
+     possesses a copy of it.  In addition, you must do these things in
+     the Modified Version:
+
+       A. Use in the Title Page (and on the covers, if any) a title
+          distinct from that of the Document, and from those of previous
+          versions (which should, if there were any, be listed in the
+          History section of the Document).  You may use the same title
+          as a previous version if the original publisher of that
+          version gives permission.
+
+       B. List on the Title Page, as authors, one or more persons or
+          entities responsible for authorship of the modifications in
+          the Modified Version, together with at least five of the
+          principal authors of the Document (all of its principal
+          authors, if it has fewer than five), unless they release you
+          from this requirement.
+
+       C. State on the Title page the name of the publisher of the
+          Modified Version, as the publisher.
+
+       D. Preserve all the copyright notices of the Document.
+
+       E. Add an appropriate copyright notice for your modifications
+          adjacent to the other copyright notices.
+
+       F. Include, immediately after the copyright notices, a license
+          notice giving the public permission to use the Modified
+          Version under the terms of this License, in the form shown in
+          the Addendum below.
+
+       G. Preserve in that license notice the full lists of Invariant
+          Sections and required Cover Texts given in the Document’s
+          license notice.
+
+       H. Include an unaltered copy of this License.
+
+       I. Preserve the section Entitled “History”, Preserve its Title,
+          and add to it an item stating at least the title, year, new
+          authors, and publisher of the Modified Version as given on the
+          Title Page.  If there is no section Entitled “History” in the
+          Document, create one stating the title, year, authors, and
+          publisher of the Document as given on its Title Page, then add
+          an item describing the Modified Version as stated in the
+          previous sentence.
+
+       J. Preserve the network location, if any, given in the Document
+          for public access to a Transparent copy of the Document, and
+          likewise the network locations given in the Document for
+          previous versions it was based on.  These may be placed in the
+          “History” section.  You may omit a network location for a work
+          that was published at least four years before the Document
+          itself, or if the original publisher of the version it refers
+          to gives permission.
+
+       K. For any section Entitled “Acknowledgements” or “Dedications”,
+          Preserve the Title of the section, and preserve in the section
+          all the substance and tone of each of the contributor
+          acknowledgements and/or dedications given therein.
+
+       L. Preserve all the Invariant Sections of the Document, unaltered
+          in their text and in their titles.  Section numbers or the
+          equivalent are not considered part of the section titles.
+
+       M. Delete any section Entitled “Endorsements”.  Such a section
+          may not be included in the Modified Version.
+
+       N. Do not retitle any existing section to be Entitled
+          “Endorsements” or to conflict in title with any Invariant
+          Section.
+
+       O. Preserve any Warranty Disclaimers.
+
+     If the Modified Version includes new front-matter sections or
+     appendices that qualify as Secondary Sections and contain no
+     material copied from the Document, you may at your option designate
+     some or all of these sections as invariant.  To do this, add their
+     titles to the list of Invariant Sections in the Modified Version’s
+     license notice.  These titles must be distinct from any other
+     section titles.
+
+     You may add a section Entitled “Endorsements”, provided it contains
+     nothing but endorsements of your Modified Version by various
+     parties—for example, statements of peer review or that the text has
+     been approved by an organization as the authoritative definition of
+     a standard.
+
+     You may add a passage of up to five words as a Front-Cover Text,
+     and a passage of up to 25 words as a Back-Cover Text, to the end of
+     the list of Cover Texts in the Modified Version.  Only one passage
+     of Front-Cover Text and one of Back-Cover Text may be added by (or
+     through arrangements made by) any one entity.  If the Document
+     already includes a cover text for the same cover, previously added
+     by you or by arrangement made by the same entity you are acting on
+     behalf of, you may not add another; but you may replace the old
+     one, on explicit permission from the previous publisher that added
+     the old one.
+
+     The author(s) and publisher(s) of the Document do not by this
+     License give permission to use their names for publicity for or to
+     assert or imply endorsement of any Modified Version.
+
+  5. COMBINING DOCUMENTS
+
+     You may combine the Document with other documents released under
+     this License, under the terms defined in section 4 above for
+     modified versions, provided that you include in the combination all
+     of the Invariant Sections of all of the original documents,
+     unmodified, and list them all as Invariant Sections of your
+     combined work in its license notice, and that you preserve all
+     their Warranty Disclaimers.
+
+     The combined work need only contain one copy of this License, and
+     multiple identical Invariant Sections may be replaced with a single
+     copy.  If there are multiple Invariant Sections with the same name
+     but different contents, make the title of each such section unique
+     by adding at the end of it, in parentheses, the name of the
+     original author or publisher of that section if known, or else a
+     unique number.  Make the same adjustment to the section titles in
+     the list of Invariant Sections in the license notice of the
+     combined work.
+
+     In the combination, you must combine any sections Entitled
+     “History” in the various original documents, forming one section
+     Entitled “History”; likewise combine any sections Entitled
+     “Acknowledgements”, and any sections Entitled “Dedications”.  You
+     must delete all sections Entitled “Endorsements.”
+
+  6. COLLECTIONS OF DOCUMENTS
+
+     You may make a collection consisting of the Document and other
+     documents released under this License, and replace the individual
+     copies of this License in the various documents with a single copy
+     that is included in the collection, provided that you follow the
+     rules of this License for verbatim copying of each of the documents
+     in all other respects.
+
+     You may extract a single document from such a collection, and
+     distribute it individually under this License, provided you insert
+     a copy of this License into the extracted document, and follow this
+     License in all other respects regarding verbatim copying of that
+     document.
+
+  7. AGGREGATION WITH INDEPENDENT WORKS
+
+     A compilation of the Document or its derivatives with other
+     separate and independent documents or works, in or on a volume of a
+     storage or distribution medium, is called an “aggregate” if the
+     copyright resulting from the compilation is not used to limit the
+     legal rights of the compilation’s users beyond what the individual
+     works permit.  When the Document is included in an aggregate, this
+     License does not apply to the other works in the aggregate which
+     are not themselves derivative works of the Document.
+
+     If the Cover Text requirement of section 3 is applicable to these
+     copies of the Document, then if the Document is less than one half
+     of the entire aggregate, the Document’s Cover Texts may be placed
+     on covers that bracket the Document within the aggregate, or the
+     electronic equivalent of covers if the Document is in electronic
+     form.  Otherwise they must appear on printed covers that bracket
+     the whole aggregate.
+
+  8. TRANSLATION
+
+     Translation is considered a kind of modification, so you may
+     distribute translations of the Document under the terms of section
+     4.  Replacing Invariant Sections with translations requires special
+     permission from their copyright holders, but you may include
+     translations of some or all Invariant Sections in addition to the
+     original versions of these Invariant Sections.  You may include a
+     translation of this License, and all the license notices in the
+     Document, and any Warranty Disclaimers, provided that you also
+     include the original English version of this License and the
+     original versions of those notices and disclaimers.  In case of a
+     disagreement between the translation and the original version of
+     this License or a notice or disclaimer, the original version will
+     prevail.
+
+     If a section in the Document is Entitled “Acknowledgements”,
+     “Dedications”, or “History”, the requirement (section 4) to
+     Preserve its Title (section 1) will typically require changing the
+     actual title.
+
+  9. TERMINATION
+
+     You may not copy, modify, sublicense, or distribute the Document
+     except as expressly provided under this License.  Any attempt
+     otherwise to copy, modify, sublicense, or distribute it is void,
+     and will automatically terminate your rights under this License.
+
+     However, if you cease all violation of this License, then your
+     license from a particular copyright holder is reinstated (a)
+     provisionally, unless and until the copyright holder explicitly and
+     finally terminates your license, and (b) permanently, if the
+     copyright holder fails to notify you of the violation by some
+     reasonable means prior to 60 days after the cessation.
+
+     Moreover, your license from a particular copyright holder is
+     reinstated permanently if the copyright holder notifies you of the
+     violation by some reasonable means, this is the first time you have
+     received notice of violation of this License (for any work) from
+     that copyright holder, and you cure the violation prior to 30 days
+     after your receipt of the notice.
+
+     Termination of your rights under this section does not terminate
+     the licenses of parties who have received copies or rights from you
+     under this License.  If your rights have been terminated and not
+     permanently reinstated, receipt of a copy of some or all of the
+     same material does not give you any rights to use it.
+
+  10. FUTURE REVISIONS OF THIS LICENSE
+
+     The Free Software Foundation may publish new, revised versions of
+     the GNU Free Documentation License from time to time.  Such new
+     versions will be similar in spirit to the present version, but may
+     differ in detail to address new problems or concerns.  See
+     <http://www.gnu.org/copyleft/>.
+
+     Each version of the License is given a distinguishing version
+     number.  If the Document specifies that a particular numbered
+     version of this License “or any later version” applies to it, you
+     have the option of following the terms and conditions either of
+     that specified version or of any later version that has been
+     published (not as a draft) by the Free Software Foundation.  If the
+     Document does not specify a version number of this License, you may
+     choose any version ever published (not as a draft) by the Free
+     Software Foundation.  If the Document specifies that a proxy can
+     decide which future versions of this License can be used, that
+     proxy’s public statement of acceptance of a version permanently
+     authorizes you to choose that version for the Document.
+
+  11. RELICENSING
+
+     “Massive Multiauthor Collaboration Site” (or “MMC Site”) means any
+     World Wide Web server that publishes copyrightable works and also
+     provides prominent facilities for anybody to edit those works.  A
+     public wiki that anybody can edit is an example of such a server.
+     A “Massive Multiauthor Collaboration” (or “MMC”) contained in the
+     site means any set of copyrightable works thus published on the MMC
+     site.
+
+     “CC-BY-SA” means the Creative Commons Attribution-Share Alike 3.0
+     license published by Creative Commons Corporation, a not-for-profit
+     corporation with a principal place of business in San Francisco,
+     California, as well as future copyleft versions of that license
+     published by that same organization.
+
+     “Incorporate” means to publish or republish a Document, in whole or
+     in part, as part of another Document.
+
+     An MMC is “eligible for relicensing” if it is licensed under this
+     License, and if all works that were first published under this
+     License somewhere other than this MMC, and subsequently
+     incorporated in whole or in part into the MMC, (1) had no cover
+     texts or invariant sections, and (2) were thus incorporated prior
+     to November 1, 2008.
+
+     The operator of an MMC Site may republish an MMC contained in the
+     site under CC-BY-SA on the same site at any time before August 1,
+     2009, provided the MMC is eligible for relicensing.
+
+ADDENDUM: How to use this License for your documents
+====================================================
+
+To use this License in a document you have written, include a copy of
+the License in the document and put the following copyright and license
+notices just after the title page:
+
+       Copyright (C)  YEAR  YOUR NAME.
+       Permission is granted to copy, distribute and/or modify this document
+       under the terms of the GNU Free Documentation License, Version 1.3
+       or any later version published by the Free Software Foundation;
+       with no Invariant Sections, no Front-Cover Texts, and no Back-Cover
+       Texts.  A copy of the license is included in the section entitled ``GNU
+       Free Documentation License''.
+
+   If you have Invariant Sections, Front-Cover Texts and Back-Cover
+Texts, replace the “with...Texts.” line with this:
+
+         with the Invariant Sections being LIST THEIR TITLES, with
+         the Front-Cover Texts being LIST, and with the Back-Cover Texts
+         being LIST.
+
+   If you have Invariant Sections without Cover Texts, or some other
+combination of the three, merge those two alternatives to suit the
+situation.
+
+   If your document contains nontrivial examples of program code, we
+recommend releasing these examples in parallel under your choice of free
+software license, such as the GNU General Public License, to permit
+their use in free software.
+
+
+File: web-server.info,  Node: Index,  Prev: GNU Free Documentation License,  Up: Top
+
+Index
+*****
+
+[index]
+* Menu:
+
+* content type:                          Function Index.      (line  60)
+* function index:                        Function Index.      (line   6)
+* handler function:                      Handlers.            (line  41)
+* handlers:                              Handlers.            (line   6)
+* introduction:                          Introduction.        (line   6)
+* matchers:                              Handlers.            (line  17)
+* requests:                              Requests.            (line   6)
+* start and stop:                        Function Index.      (line  32)
+* usage examples:                        Usage Examples.      (line   6)
+* ws-compress-cmd:                       Function Index.      (line 165)
+* ws-deflate-cmd:                        Function Index.      (line 168)
+* ws-gzip-cmd:                           Function Index.      (line 171)
+* ws-in-directory-p:                     Function Index.      (line 113)
+* ws-request:                            Function Index.      (line  19)
+* ws-response-header:                    Function Index.      (line  60)
+* ws-send:                               Function Index.      (line  87)
+* ws-send-404:                           Function Index.      (line  95)
+* ws-send-500:                           Function Index.      (line  91)
+* ws-send-directory-list:                Function Index.      (line 106)
+* ws-send-file:                          Function Index.      (line  99)
+* ws-server:                             Function Index.      (line  13)
+* ws-servers:                            Function Index.      (line  41)
+* ws-start:                              Function Index.      (line  35)
+* ws-stop:                               Function Index.      (line  44)
+* ws-stop-all:                           Function Index.      (line  50)
+* ws-web-socket-connect:                 Function Index.      (line 145)
+* ws-with-authentication:                Function Index.      (line 125)
+
+
+
+Tag Table:
+Node: Top709
+Node: Introduction2088
+Node: Handlers2778
+Node: Requests4796
+Node: Usage Examples6114
+Node: Hello World7048
+Node: Hello World UTF87885
+Node: Hello World HTML9065
+Node: File Server9780
+Node: URL Parameter Echo11143
+Node: POST Echo12377
+Node: Basic Authentication13446
+Node: Org-mode Export14987
+Node: File Upload17729
+Node: Web Socket18885
+Node: Gzipped Transfer Encoding22129
+Node: Chunked Transfer Encoding23797
+Node: Function Index25592
+Ref: ws-server25876
+Ref: ws-request26202
+Ref: ws-start26966
+Ref: ws-servers27253
+Ref: ws-stop27346
+Ref: ws-stop-all27579
+Ref: ws-response-header27872
+Ref: ws-send29112
+Ref: ws-send-50029291
+Ref: ws-send-40429448
+Ref: ws-send-file29598
+Ref: ws-send-directory-list29971
+Ref: ws-in-directory-p30353
+Ref: ws-with-authentication30672
+Ref: ws-web-socket-connect31508
+Ref: ws-compress-cmd32395
+Ref: ws-deflate-cmd32495
+Ref: ws-gzip-cmd32593
+Node: Copying32685
+Node: GNU Free Documentation License70476
+Node: Index95831
+
+End Tag Table
+
+
+Local Variables:
+coding: utf-8
+End:
diff --git a/org/elpa/websocket-20210110.17/websocket-autoloads.el b/org/elpa/websocket-20210110.17/websocket-autoloads.el
new file mode 100644
index 0000000..c68dedb
--- /dev/null
+++ b/org/elpa/websocket-20210110.17/websocket-autoloads.el
@@ -0,0 +1,22 @@
+;;; websocket-autoloads.el --- automatically extracted autoloads  -*- lexical-binding: t -*-
+;;
+;;; Code:
+
+(add-to-list 'load-path (directory-file-name
+                         (or (file-name-directory #$) (car load-path))))
+
+
+;;;### (autoloads nil "websocket" "websocket.el" (0 0 0 0))
+;;; Generated autoloads from websocket.el
+
+(register-definition-prefixes "websocket" '("websocket-"))
+
+;;;***
+
+;; Local Variables:
+;; version-control: never
+;; no-byte-compile: t
+;; no-update-autoloads: t
+;; coding: utf-8
+;; End:
+;;; websocket-autoloads.el ends here
diff --git a/org/elpa/websocket-20210110.17/websocket-pkg.el b/org/elpa/websocket-20210110.17/websocket-pkg.el
new file mode 100644
index 0000000..94e8803
--- /dev/null
+++ b/org/elpa/websocket-20210110.17/websocket-pkg.el
@@ -0,0 +1,2 @@
+;;; Generated package description from websocket.el  -*- no-byte-compile: t -*-
+(define-package "websocket" "20210110.17" "Emacs WebSocket client and server" '((cl-lib "0.5")) :commit "34e11124fdd9d73e431499ba8a6b6a8023519664" :authors '(("Andrew Hyatt" . "ahyatt@gmail.com")) :maintainer '("Andrew Hyatt" . "ahyatt@gmail.com") :keywords '("communication" "websocket" "server") :url "https://github.com/ahyatt/emacs-websocket")
diff --git a/org/elpa/websocket-20210110.17/websocket.el b/org/elpa/websocket-20210110.17/websocket.el
new file mode 100644
index 0000000..fa01d5e
--- /dev/null
+++ b/org/elpa/websocket-20210110.17/websocket.el
@@ -0,0 +1,1052 @@
+;;; websocket.el --- Emacs WebSocket client and server  -*- lexical-binding:t -*-
+
+;; Copyright (c) 2013, 2016-2017  Free Software Foundation, Inc.
+
+;; Author: Andrew Hyatt <ahyatt@gmail.com>
+;; Homepage: https://github.com/ahyatt/emacs-websocket
+;; Keywords: Communication, Websocket, Server
+;; Package-Version: 20210110.17
+;; Package-Commit: 34e11124fdd9d73e431499ba8a6b6a8023519664
+;; Version: 1.13
+;; Package-Requires: ((cl-lib "0.5"))
+;;
+;; This program is free software; you can redistribute it and/or
+;; modify it under the terms of the GNU General Public License as
+;; published by the Free Software Foundation; either version 2 of the
+;; License, or (at your option) any later version.
+;;
+;; This program is distributed in the hope that it will be useful, but
+;; WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+;; General Public License for more details.
+;;
+;; You should have received a copy of the GNU General Public License
+;; along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.
+
+;;; Commentary:
+;; This implements RFC 6455, which can be found at
+;; http://tools.ietf.org/html/rfc6455.
+;;
+;; This library contains code to connect Emacs as a client to a
+;; websocket server, and for Emacs to act as a server for websocket
+;; connections.
+;;
+;; Websockets clients are created by calling `websocket-open', which
+;; returns a `websocket' struct.  Users of this library use the
+;; websocket struct, and can call methods `websocket-send-text', which
+;; sends text over the websocket, or `websocket-send', which sends a
+;; `websocket-frame' struct, enabling finer control of what is sent.
+;; A callback is passed to `websocket-open' that will retrieve
+;; websocket frames called from the websocket.  Websockets are
+;; eventually closed with `websocket-close'.
+;;
+;; Server functionality is similar.  A server is started with
+;; `websocket-server' called with a port and the callbacks to use,
+;; which returns a process.  The process can later be closed with
+;; `websocket-server-close'.  A `websocket' struct is also created
+;; for every connection, and is exposed through the callbacks.
+
+(require 'bindat)
+(require 'url-parse)
+(require 'url-cookie)
+(require 'seq)
+(eval-when-compile (require 'cl-lib))
+
+;;; Code:
+
+(cl-defstruct (websocket
+            (:constructor nil)
+            (:constructor websocket-inner-create))
+  "A websocket structure.
+This follows the W3C Websocket API, except translated to elisp
+idioms.  The API is implemented in both the websocket struct and
+additional methods.  Due to how defstruct slots are accessed, all
+API methods are prefixed with \"websocket-\" and take a websocket
+as an argument, so the distrinction between the struct API and
+the additional helper APIs are not visible to the caller.
+
+A websocket struct is created with `websocket-open'.
+
+`ready-state' contains one of `connecting', `open', or
+`closed', depending on the state of the websocket.
+
+The W3C API \"bufferedAmount\" call is not currently implemented,
+since there is no elisp API to get the buffered amount from the
+subprocess.  There may, in fact, be output data buffered,
+however, when the `on-message' or `on-close' callbacks are
+called.
+
+`on-open', `on-message', `on-close', and `on-error' are described
+in `websocket-open'.
+
+The `negotiated-extensions' slot lists the extensions accepted by
+both the client and server, and `negotiated-protocols' does the
+same for the protocols."
+  ;; API
+  (ready-state 'connecting)
+  client-data
+  on-open
+  on-message
+  on-close
+  on-error
+  negotiated-protocols
+  negotiated-extensions
+  (server-p nil :read-only t)
+
+  ;; Other data - clients should not have to access this.
+  (url (cl-assert nil) :read-only t)
+  (protocols nil :read-only t)
+  (extensions nil :read-only t)
+  (conn (cl-assert nil) :read-only t)
+  ;; Only populated for servers, this is the server connection.
+  server-conn
+  accept-string
+  (inflight-input nil))
+
+(defvar websocket-version "1.12"
+  "Version numbers of this version of websocket.el.")
+
+(defvar websocket-debug nil
+  "Set to true to output debugging info to a per-websocket buffer.
+The buffer is ` *websocket URL debug*' where URL is the
+URL of the connection.")
+
+(defconst websocket-guid "258EAFA5-E914-47DA-95CA-C5AB0DC85B11"
+  "The websocket GUID as defined in RFC 6455.
+Do not change unless the RFC changes.")
+
+(defvar websocket-callback-debug-on-error nil
+  "If true, when an error happens in a client callback, invoke the debugger.
+Having this on can cause issues with missing frames if the debugger is
+exited by quitting instead of continuing, so it's best to have this set
+to nil unless it is especially needed.")
+
+(defmacro websocket-document-function (function docstring)
+  "Document FUNCTION with DOCSTRING.  Use this for defstruct accessor etc."
+  (declare (indent defun)
+           (doc-string 2))
+  `(put ',function 'function-documentation ,docstring))
+
+(websocket-document-function websocket-on-open
+  "Accessor for websocket on-open callback.
+See `websocket-open' for details.
+
+\(fn WEBSOCKET)")
+
+(websocket-document-function websocket-on-message
+  "Accessor for websocket on-message callback.
+See `websocket-open' for details.
+
+\(fn WEBSOCKET)")
+
+(websocket-document-function websocket-on-close
+  "Accessor for websocket on-close callback.
+See `websocket-open' for details.
+
+\(fn WEBSOCKET)")
+
+(websocket-document-function websocket-on-error
+  "Accessor for websocket on-error callback.
+See `websocket-open' for details.
+
+\(fn WEBSOCKET)")
+
+(defun websocket-genbytes (nbytes)
+  "Generate NBYTES random bytes."
+  (let ((s (make-string nbytes ?\s)))
+    (dotimes (i nbytes)
+      (aset s i (random 256)))
+    s))
+
+(defun websocket-try-callback (websocket-callback callback-type websocket
+                                                  &rest rest)
+  "Invoke function WEBSOCKET-CALLBACK with WEBSOCKET and REST args.
+If an error happens, it is handled according to
+`websocket-callback-debug-on-error'."
+  ;; This looks like it should be able to done more efficiently, but
+  ;; I'm not sure that's the case.  We can't do it as a macro, since
+  ;; we want it to change whenever websocket-callback-debug-on-error
+  ;; changes.
+  (let ((args rest)
+        (debug-on-error websocket-callback-debug-on-error))
+    (push websocket args)
+    (if websocket-callback-debug-on-error
+        (condition-case err
+            (apply (funcall websocket-callback websocket) args)
+          ((debug error) (funcall (websocket-on-error websocket)
+                                  websocket callback-type err)))
+      (condition-case err
+          (apply (funcall websocket-callback websocket) args)
+        (error (funcall (websocket-on-error websocket) websocket
+                        callback-type err))))))
+
+(defun websocket-genkey ()
+  "Generate a key suitable for the websocket handshake."
+  (base64-encode-string (websocket-genbytes 16)))
+
+(defun websocket-calculate-accept (key)
+  "Calculate the expect value of the accept header.
+This is based on the KEY from the Sec-WebSocket-Key header."
+  (base64-encode-string
+   (sha1 (concat key websocket-guid) nil nil t)))
+
+(defun websocket-get-bytes (s n)
+  "From string S, retrieve the value of N bytes.
+Return the value as an unsigned integer.  The value N must be a
+power of 2, up to 8.
+
+We support getting frames up to 536870911 bytes (2^29 - 1),
+approximately 537M long."
+  (if (= n 8)
+      (let* ((32-bit-parts
+              (bindat-get-field (bindat-unpack '((:val vec 2 u32)) s) :val))
+             (cval
+              (logior (lsh (aref 32-bit-parts 0) 32) (aref 32-bit-parts 1))))
+        (if (and (= (aref 32-bit-parts 0) 0)
+                 (= (lsh (aref 32-bit-parts 1) -29) 0))
+            cval
+          (signal 'websocket-unparseable-frame
+                  (list "Frame value found too large to parse!"))))
+    ;; n is not 8
+    (bindat-get-field
+     (condition-case _
+         (bindat-unpack
+          `((:val
+             ,(cond ((= n 1) 'u8)
+                    ((= n 2) 'u16)
+                    ((= n 4) 'u32)
+                    ;; This is an error with the library,
+                    ;; not a user-facing, meaningful error.
+                    (t (error
+                        "websocket-get-bytes: Unknown N: %S" n)))))
+          s)
+       (args-out-of-range (signal 'websocket-unparseable-frame
+                                  (list (format "Frame unexpectedly short: %s" s)))))
+     :val)))
+
+(defun websocket-to-bytes (val nbytes)
+  "Encode the integer VAL in NBYTES of data.
+NBYTES much be a power of 2, up to 8.
+
+This supports encoding values up to 536870911 bytes (2^29 - 1),
+approximately 537M long."
+  (when (and (< nbytes 8)
+             (> val (expt 2 (* 8 nbytes))))
+    ;; not a user-facing error, this must be caused from an error in
+    ;; this library
+    (error "websocket-to-bytes: Value %d could not be expressed in %d bytes"
+           val nbytes))
+  (if (= nbytes 8)
+      (progn
+        (let* ((hi-32bits (lsh val -32))
+               ;; This is just VAL on systems that don't have >= 32 bits.
+               (low-32bits (- val (lsh hi-32bits 32))))
+          (when (or (> hi-32bits 0) (> (lsh low-32bits -29) 0))
+            (signal 'websocket-frame-too-large (list val)))
+          (bindat-pack `((:val vec 2 u32))
+                       `((:val . [,hi-32bits ,low-32bits])))))
+    (bindat-pack
+     `((:val ,(cond ((= nbytes 1) 'u8)
+                    ((= nbytes 2) 'u16)
+                    ((= nbytes 4) 'u32)
+                    ;; Library error, not system error
+                    (t (error "websocket-to-bytes: Unknown NBYTES: %S" nbytes)))))
+     `((:val . ,val)))))
+
+(defun websocket-get-opcode (s)
+  "Retrieve the opcode from first byte of string S."
+  (websocket-ensure-length s 1)
+  (let ((opcode (logand #xf (aref s 0))))
+    (cond ((= opcode 0) 'continuation)
+          ((= opcode 1) 'text)
+          ((= opcode 2) 'binary)
+          ((= opcode 8) 'close)
+          ((= opcode 9) 'ping)
+          ((= opcode 10) 'pong))))
+
+(defun websocket-get-payload-len (s)
+  "Parse out the payload length from the string S.
+We start at position 0, and return a cons of the payload length and how
+many bytes were consumed from the string."
+  (websocket-ensure-length s 1)
+  (let* ((initial-val (logand 127 (aref s 0))))
+    (cond ((= initial-val 127)
+           (websocket-ensure-length s 9)
+           (cons (websocket-get-bytes (substring s 1) 8) 9))
+          ((= initial-val 126)
+           (websocket-ensure-length s 3)
+           (cons (websocket-get-bytes (substring s 1) 2) 3))
+          (t (cons initial-val 1)))))
+
+(cl-defstruct websocket-frame opcode payload length completep)
+
+(defun websocket-frame-text (frame)
+  "Given FRAME, return the payload as a utf-8 encoded string."
+  (cl-assert (websocket-frame-p frame))
+  (decode-coding-string (websocket-frame-payload frame) 'utf-8))
+
+(defun websocket-mask (key data)
+  "Using string KEY, mask string DATA according to the RFC.
+This is used to both mask and unmask data."
+  ;; Returning the string as unibyte is important here. Because we set the
+  ;; string byte by byte, this results in a unibyte string.
+  (cl-loop
+   with result = (make-string (length data) ?x)
+   for i from 0 below (length data)
+   do (setf (seq-elt result i) (logxor (aref key (mod i 4)) (seq-elt data i)))
+   finally return result))
+
+(defun websocket-ensure-length (s n)
+  "Ensure the string S has at most N bytes.
+Otherwise we throw the error `websocket-incomplete-frame'."
+  (when (< (length s) n)
+    (throw 'websocket-incomplete-frame nil)))
+
+(defun websocket-encode-frame (frame should-mask)
+  "Encode the FRAME struct to the binary representation.
+We mask the frame or not, depending on SHOULD-MASK."
+  (let* ((opcode (websocket-frame-opcode frame))
+         (payload (websocket-frame-payload frame))
+         (fin (websocket-frame-completep frame))
+         (payloadp (and payload
+                        (memq opcode '(continuation ping pong text binary))))
+         (mask-key (when should-mask (websocket-genbytes 4))))
+    (apply #'unibyte-string
+           (let ((val (append (list
+                               (logior (pcase opcode
+                                         (`continuation 0)
+                                         (`text         1)
+                                         (`binary       2)
+                                         (`close        8)
+                                         (`ping         9)
+                                         (`pong         10))
+                                       (if fin 128 0)))
+                           (when payloadp
+                             (list
+                              (logior
+                               (if should-mask 128 0)
+                               (cond ((< (length payload) 126) (length payload))
+                                     ((< (length payload) 65536) 126)
+                                     (t 127)))))
+                           (when (and payloadp (>= (length payload) 126))
+                             (append (websocket-to-bytes
+                                      (length payload)
+                                      (cond ((< (length payload) 126) 1)
+                                            ((< (length payload) 65536) 2)
+                                            (t 8))) nil))
+                           (when (and payloadp should-mask)
+                             (append mask-key nil))
+                           (when payloadp
+                             (append (if should-mask (websocket-mask mask-key payload)
+                                       payload)
+                                     nil)))))
+             ;; We have to make sure the non-payload data is a full 32-bit frame
+             (if (= 1 (length val))
+                 (append val '(0)) val)))))
+
+(defun websocket-read-frame (s)
+  "Read from string S a `websocket-frame' struct with the contents.
+This only gets complete frames.  Partial frames need to wait until
+the frame finishes.  If the frame is not completed, return NIL."
+  (catch 'websocket-incomplete-frame
+    (websocket-ensure-length s 1)
+    (let* ((opcode (websocket-get-opcode s))
+           (fin (logand 128 (aref s 0)))
+           (payloadp (memq opcode '(continuation text binary ping pong)))
+           (payload-len (when payloadp
+                          (websocket-get-payload-len (substring s 1))))
+           (maskp (and
+                   payloadp
+                   (= 128 (logand 128 (aref s 1)))))
+           (payload-start (when payloadp (+ (if maskp 5 1) (cdr payload-len))))
+           (payload-end (when payloadp (+ payload-start (car payload-len))))
+           (unmasked-payload (when payloadp
+                               (websocket-ensure-length s payload-end)
+                               (substring s payload-start payload-end))))
+      (make-websocket-frame
+       :opcode opcode
+       :payload
+       (if maskp
+           (let ((masking-key (substring s (+ 1 (cdr payload-len))
+                                         (+ 5 (cdr payload-len)))))
+             (websocket-mask masking-key unmasked-payload))
+         unmasked-payload)
+       :length (if payloadp payload-end 1)
+       :completep (> fin 0)))))
+
+(defun websocket-format-error (err)
+  "Format an error message like command level does.
+ERR should be a cons of error symbol and error data."
+
+  ;; Formatting code adapted from `edebug-report-error'
+  (concat (or (get (car err) 'error-message)
+              (format "peculiar error (%s)" (car err)))
+          (when (cdr err)
+            (format ": %s"
+                    (mapconcat #'prin1-to-string
+                               (cdr err) ", ")))))
+
+(defun websocket-default-error-handler (_websocket type err)
+  "The default error handler used to handle errors in callbacks."
+  (display-warning 'websocket
+                   (format "in callback `%S': %s"
+                           type
+                           (websocket-format-error err))
+                   :error))
+
+;; Error symbols in use by the library
+(put 'websocket-unsupported-protocol 'error-conditions
+     '(error websocket-error websocket-unsupported-protocol))
+(put 'websocket-unsupported-protocol 'error-message "Unsupported websocket protocol")
+(put 'websocket-wss-needs-emacs-24 'error-conditions
+     '(error websocket-error websocket-unsupported-protocol
+             websocket-wss-needs-emacs-24))
+(put 'websocket-wss-needs-emacs-24 'error-message
+     "wss protocol is not supported for Emacs before version 24.")
+(put 'websocket-received-error-http-response 'error-conditions
+     '(error websocket-error websocket-received-error-http-response))
+(put 'websocket-received-error-http-response 'error-message
+     "Error response received from websocket server")
+(put 'websocket-invalid-header 'error-conditions
+     '(error websocket-error websocket-invalid-header))
+(put 'websocket-invalid-header 'error-message
+     "Invalid HTTP header sent")
+(put 'websocket-illegal-frame 'error-conditions
+     '(error websocket-error websocket-illegal-frame))
+(put 'websocket-illegal-frame 'error-message
+     "Cannot send illegal frame to websocket")
+(put 'websocket-closed 'error-conditions
+     '(error websocket-error websocket-closed))
+(put 'websocket-closed 'error-message
+     "Cannot send message to a closed websocket")
+(put 'websocket-unparseable-frame 'error-conditions
+     '(error websocket-error websocket-unparseable-frame))
+(put 'websocket-unparseable-frame 'error-message
+     "Received an unparseable frame")
+(put 'websocket-frame-too-large 'error-conditions
+     '(error websocket-error websocket-frame-too-large))
+(put 'websocket-frame-too-large 'error-message
+     "The frame being sent is too large for this emacs to handle")
+
+(defun websocket-intersect (a b)
+  "Simple list intersection, should function like Common Lisp's `intersection'."
+  (let ((result))
+    (dolist (elem a (nreverse result))
+      (when (member elem b)
+        (push elem result)))))
+
+(defun websocket-get-debug-buffer-create (websocket)
+  "Get or create the buffer corresponding to WEBSOCKET."
+  (let ((buf (get-buffer-create (format "*websocket %s debug*"
+                                    (websocket-url websocket)))))
+    (when (= 0 (buffer-size buf))
+      (buffer-disable-undo buf))
+    buf))
+
+(defun websocket-debug (websocket msg &rest args)
+  "In the WEBSOCKET's debug buffer, send MSG, with format ARGS."
+  (when websocket-debug
+    (let ((buf (websocket-get-debug-buffer-create websocket)))
+      (save-excursion
+        (with-current-buffer buf
+          (goto-char (point-max))
+          (insert "[WS] ")
+          (insert (apply #'format (append (list msg) args)))
+          (insert "\n"))))))
+
+(defun websocket-verify-response-code (output)
+  "Verify that OUTPUT contains a valid HTTP response code.
+The only acceptable one to websocket is responce code 101.
+A t value will be returned on success, and an error thrown
+if not."
+  (unless (string-match "^HTTP/1.1 \\([[:digit:]]+\\)" output)
+    (signal 'websocket-invalid-header (list "Invalid HTTP status line")))
+  (unless (equal "101" (match-string 1 output))
+    (signal 'websocket-received-error-http-response
+	        (list (string-to-number (match-string 1 output)))))
+  t)
+
+(defun websocket-parse-repeated-field (output field)
+  "From header-containing OUTPUT, parse out the list from a
+possibly repeated field."
+  (let ((pos 0)
+        (extensions))
+    (while (and pos
+                (string-match (format "\r\n%s: \\(.*\\)\r\n" field)
+                              output pos))
+      (when (setq pos (match-end 1))
+        (setq extensions (append extensions (split-string
+                                             (match-string 1 output) ", ?")))))
+    extensions))
+
+(defun websocket-process-frame (websocket frame)
+  "Using the WEBSOCKET's filter and connection, process the FRAME.
+This returns a lambda that should be executed when all frames have
+been processed.  If the frame has a payload, the lambda has the frame
+passed to the filter slot of WEBSOCKET.  If the frame is a ping,
+the lambda has a reply with a pong.  If the frame is a close, the lambda
+has connection termination."
+  (let ((opcode (websocket-frame-opcode frame)))
+    (cond ((memq opcode '(continuation text binary))
+           (lambda () (websocket-try-callback 'websocket-on-message 'on-message
+                                         websocket frame)))
+          ((eq opcode 'ping)
+           (lambda () (websocket-send websocket
+                                 (make-websocket-frame
+                                  :opcode 'pong
+                                  :payload (websocket-frame-payload frame)
+                                  :completep t))))
+          ((eq opcode 'close)
+           (lambda () (delete-process (websocket-conn websocket))))
+          (t (lambda ())))))
+
+(defun websocket-process-input-on-open-ws (websocket text)
+  "This handles input processing for both the client and server filters."
+  (let ((current-frame)
+        (processing-queue)
+        (start-point 0))
+    (while (setq current-frame (websocket-read-frame
+                                (substring text start-point)))
+      (push (websocket-process-frame websocket current-frame) processing-queue)
+      (cl-incf start-point (websocket-frame-length current-frame)))
+    (when (> (length text) start-point)
+      (setf (websocket-inflight-input websocket)
+            (substring text start-point)))
+    (dolist (to-process (nreverse processing-queue))
+      (funcall to-process))))
+
+(defun websocket-send-text (websocket text)
+  "To the WEBSOCKET, send TEXT as a complete frame."
+  (websocket-send
+   websocket
+   (make-websocket-frame :opcode 'text
+                         :payload (encode-coding-string
+                                   text 'raw-text)
+                         :completep t)))
+
+(defun websocket-check (frame)
+  "Check FRAME for correctness, returning true if correct."
+  (or
+   ;; Text, binary, and continuation frames need payloads
+   (and (memq (websocket-frame-opcode frame) '(text binary continuation))
+        (websocket-frame-payload frame))
+   ;; Pings and pongs may optionally have them
+   (memq (websocket-frame-opcode frame) '(ping pong))
+   ;; And close shouldn't have any payload, and should always be complete.
+   (and (eq (websocket-frame-opcode frame) 'close)
+        (not (websocket-frame-payload frame))
+        (websocket-frame-completep frame))))
+
+(defun websocket-send (websocket frame)
+  "To the WEBSOCKET server, send the FRAME.
+This will raise an error if the frame is illegal.
+
+The error signaled may be of type `websocket-illegal-frame' if
+the frame is malformed in some way, also having the condition
+type of `websocket-error'.  The data associated with the signal
+is the frame being sent.
+
+If the websocket is closed a signal `websocket-closed' is sent,
+also with `websocket-error' condition.  The data in the signal is
+also the frame.
+
+The frame may be too large for this buid of Emacs, in which case
+`websocket-frame-too-large' is returned, with the data of the
+size of the frame which was too large to process.  This also has
+the `websocket-error' condition."
+  (unless (websocket-check frame)
+    (signal 'websocket-illegal-frame (list frame)))
+  (websocket-debug websocket "Sending frame, opcode: %s payload: %s"
+                   (websocket-frame-opcode frame)
+                   (websocket-frame-payload frame))
+  (unless (websocket-openp websocket)
+    (signal 'websocket-closed (list frame)))
+  (process-send-string (websocket-conn websocket)
+                       ;; We mask only when we're a client, following the spec.
+                       (websocket-encode-frame frame (not (websocket-server-p websocket)))))
+
+(defun websocket-openp (websocket)
+  "Check WEBSOCKET and return non-nil if the connection is open."
+  (and websocket
+       (not (eq 'close (websocket-ready-state websocket)))
+       (member (process-status (websocket-conn websocket)) '(open run))))
+
+(defun websocket-close (websocket)
+  "Close WEBSOCKET and erase all the old websocket data."
+  (websocket-debug websocket "Closing websocket")
+  (websocket-try-callback 'websocket-on-close 'on-close websocket)
+  (when (websocket-openp websocket)
+    (websocket-send websocket
+                    (make-websocket-frame :opcode 'close
+                                          :completep t))
+    (setf (websocket-ready-state websocket) 'closed))
+  (delete-process (websocket-conn websocket)))
+
+;;;;;;;;;;;;;;;;;;;;;;
+;; Websocket client ;;
+;;;;;;;;;;;;;;;;;;;;;;
+
+(cl-defun websocket-open (url &key protocols extensions (on-open 'identity)
+                              (on-message (lambda (_w _f))) (on-close 'identity)
+                              (on-error 'websocket-default-error-handler)
+                              (nowait nil) (custom-header-alist nil))
+  "Open a websocket connection to URL, returning the `websocket' struct.
+The PROTOCOL argument is optional, and setting it will declare to
+the server that this client supports the protocols in the list
+given.  We will require that the server also has to support that
+protocols.
+
+Similar logic applies to EXTENSIONS, which is a list of conses,
+the car of which is a string naming the extension, and the cdr of
+which is the list of parameter strings to use for that extension.
+The parameter strings are of the form \"key=value\" or \"value\".
+EXTENSIONS can be NIL if none are in use.  An example value would
+be (\"deflate-stream\" . (\"mux\" \"max-channels=4\")).
+
+Cookies that are set via `url-cookie-store' will be used during
+communication with the server, and cookies received from the
+server will be stored in the same cookie storage that the
+`url-cookie' package uses.
+
+Optionally you can specify
+ON-OPEN, ON-MESSAGE and ON-CLOSE callbacks as well.
+
+The ON-OPEN callback is called after the connection is
+established with the websocket as the only argument.  The return
+value is unused.
+
+The ON-MESSAGE callback is called after receiving a frame, and is
+called with the websocket as the first argument and
+`websocket-frame' struct as the second.  The return value is
+unused.
+
+The ON-CLOSE callback is called after the connection is closed, or
+failed to open.  It is called with the websocket as the only
+argument, and the return value is unused.
+
+The ON-ERROR callback is called when any of the other callbacks
+have an error.  It takes the websocket as the first argument, and
+a symbol as the second argument either `on-open', `on-message',
+or `on-close', and the error as the third argument. Do NOT
+rethrow the error, or else you may miss some websocket messages.
+You similarly must not generate any other errors in this method.
+If you want to debug errors, set
+`websocket-callback-debug-on-error' to t, but this also can be
+dangerous is the debugger is quit out of.  If not specified,
+`websocket-default-error-handler' is used.
+
+For each of these event handlers, the client code can store
+arbitrary data in the `client-data' slot in the returned
+websocket.
+
+The following errors might be thrown in this method or in
+websocket processing, all of them having the error-condition
+`websocket-error' in addition to their own symbol:
+
+`websocket-unsupported-protocol': Data in the error signal is the
+protocol that is unsupported.  For example, giving a URL starting
+with http by mistake raises this error.
+
+`websocket-wss-needs-emacs-24': Trying to connect wss protocol
+using Emacs < 24 raises this error.  You can catch this error
+also by `websocket-unsupported-protocol'.
+
+`websocket-received-error-http-response': Data in the error
+signal is the integer error number.
+
+`websocket-invalid-header': Data in the error is a string
+describing the invalid header received from the server.
+
+`websocket-unparseable-frame': Data in the error is a string
+describing the problem with the frame.
+
+`nowait': If NOWAIT is true, return without waiting for the
+connection to complete.
+
+`custom-headers-alist': An alist of custom headers to pass to the
+server. The car is the header name, the cdr is the header value.
+These are different from the extensions because it is not related
+to the websocket protocol.
+"
+  (let* ((name (format "websocket to %s" url))
+         (url-struct (url-generic-parse-url url))
+         (key (websocket-genkey))
+         (coding-system-for-read 'binary)
+         (coding-system-for-write 'binary)
+         (conn (if (member (url-type url-struct) '("ws" "wss"))
+                   (let* ((type (if (equal (url-type url-struct) "ws")
+                                    'plain 'tls))
+                          (port (if (= 0 (url-port url-struct))
+                                    (if (eq type 'tls) 443 80)
+                                  (url-port url-struct)))
+                          (host (url-host url-struct)))
+                     (if (eq type 'plain)
+                         (make-network-process :name name :buffer nil :host host
+                                               :service port :nowait nowait)
+                       (condition-case-unless-debug nil
+                           (open-network-stream name nil host port :type type :nowait nowait)
+                         (wrong-number-of-arguments
+                          (signal 'websocket-wss-needs-emacs-24 (list "wss"))))))
+                 (signal 'websocket-unsupported-protocol (list (url-type url-struct)))))
+         (websocket (websocket-inner-create
+                     :conn conn
+                     :url url
+                     :on-open on-open
+                     :on-message on-message
+                     :on-close on-close
+                     :on-error on-error
+                     :protocols protocols
+                     :extensions (mapcar 'car extensions)
+                     :accept-string
+                     (websocket-calculate-accept key))))
+    (unless conn (error "Could not establish the websocket connection to %s" url))
+    (process-put conn :websocket websocket)
+    (set-process-filter conn
+                        (lambda (process output)
+                          (let ((websocket (process-get process :websocket)))
+                            (websocket-outer-filter websocket output))))
+    (set-process-sentinel
+     conn
+     (websocket-sentinel url conn key protocols extensions custom-header-alist nowait))
+    (set-process-query-on-exit-flag conn nil)
+    (websocket-ensure-handshake url conn key protocols extensions custom-header-alist nowait)
+    websocket))
+
+(defun websocket-sentinel (url conn key protocols extensions custom-header-alist nowait)
+  #'(lambda (process change)
+      (let ((websocket (process-get process :websocket)))
+        (websocket-debug websocket "State change to %s" change)
+        (let ((status (process-status process)))
+          (when (and nowait (eq status 'open))
+            (websocket-ensure-handshake url conn key protocols extensions custom-header-alist nowait))
+
+          (when (and (member status '(closed failed exit signal))
+                     (not (eq 'closed (websocket-ready-state websocket))))
+            (websocket-try-callback 'websocket-on-close 'on-close websocket))))))
+
+(defun websocket-ensure-handshake (url conn key protocols extensions custom-header-alist nowait)
+  (let ((url-struct (url-generic-parse-url url))
+        (websocket (process-get conn :websocket)))
+    (when (and (eq 'connecting (websocket-ready-state websocket))
+               (memq (process-status conn)
+                     (list 'run (if nowait 'connect 'open))))
+      (websocket-debug websocket "Sending handshake, key: %s, acceptance: %s"
+                       key (websocket-accept-string websocket))
+      (process-send-string conn
+                           (format "GET %s HTTP/1.1\r\n%s"
+                                   (let ((path (url-filename url-struct)))
+                                     (if (> (length path) 0) path "/"))
+                                   (websocket-create-headers
+                                    url key protocols extensions custom-header-alist))))))
+
+(defun websocket-process-headers (url headers)
+  "On opening URL, process the HEADERS sent from the server."
+  (when (string-match "Set-Cookie: \(.*\)\r\n" headers)
+    ;; The url-current-object is assumed to be set by
+    ;; url-cookie-handle-set-cookie.
+    (let ((url-current-object (url-generic-parse-url url)))
+      (url-cookie-handle-set-cookie (match-string 1 headers)))))
+
+(defun websocket-outer-filter (websocket output)
+  "Filter the WEBSOCKET server's OUTPUT.
+This will parse headers and process frames repeatedly until there
+is no more output or the connection closes.  If the websocket
+connection is invalid, the connection will be closed."
+  (websocket-debug websocket "Received: %s" output)
+  (let ((start-point)
+        (text (concat (websocket-inflight-input websocket) output))
+        (header-end-pos))
+    (setf (websocket-inflight-input websocket) nil)
+    ;; If we've received the complete header, check to see if we've
+    ;; received the desired handshake.
+    (when (and (eq 'connecting (websocket-ready-state websocket)))
+      (if (and (setq header-end-pos (string-match "\r\n\r\n" text))
+               (setq start-point (+ 4 header-end-pos)))
+          (progn
+            (condition-case err
+                (progn
+                  (websocket-verify-response-code text)
+                  (websocket-verify-headers websocket text)
+                  (websocket-process-headers (websocket-url websocket) text))
+              (error
+               (websocket-close websocket)
+               (funcall (websocket-on-error websocket)
+                        websocket 'on-open err)))
+            (setf (websocket-ready-state websocket) 'open)
+            (websocket-try-callback 'websocket-on-open 'on-open websocket))
+        (setf (websocket-inflight-input websocket) text)))
+    (when (eq 'open (websocket-ready-state websocket))
+      (websocket-process-input-on-open-ws
+       websocket (substring text (or start-point 0))))))
+
+(defun websocket-verify-headers (websocket output)
+  "Based on WEBSOCKET's data, ensure the headers in OUTPUT are valid.
+The output is assumed to have complete headers.  This function
+will either return t or call `error'.  This has the side-effect
+of populating the list of server extensions to WEBSOCKET."
+  (let ((accept-regexp
+         (concat "Sec-Web[Ss]ocket-Accept: " (regexp-quote (websocket-accept-string websocket)))))
+    (websocket-debug websocket "Checking for accept header regexp: %s" accept-regexp)
+    (unless (string-match accept-regexp output)
+      (signal 'websocket-invalid-header
+              (list "Incorrect handshake from websocket: is this really a websocket connection?"))))
+  (let ((case-fold-search t))
+    (websocket-debug websocket "Checking for upgrade header")
+    (unless (string-match "\r\nUpgrade: websocket\r\n" output)
+      (signal 'websocket-invalid-header
+              (list "No 'Upgrade: websocket' header found")))
+    (websocket-debug websocket "Checking for connection header")
+    (unless (string-match "\r\nConnection: upgrade\r\n" output)
+      (signal 'websocket-invalid-header
+              (list "No 'Connection: upgrade' header found")))
+    (when (websocket-protocols websocket)
+      (dolist (protocol (websocket-protocols websocket))
+        (websocket-debug websocket "Checking for protocol match: %s"
+                         protocol)
+        (let ((protocols
+               (if (string-match (format "\r\nSec-Websocket-Protocol: %s\r\n"
+                                         protocol)
+                                 output)
+                   (list protocol)
+                 (signal 'websocket-invalid-header
+                         (list "Incorrect or missing protocol returned by the server.")))))
+          (setf (websocket-negotiated-protocols websocket) protocols))))
+    (let* ((extensions (websocket-parse-repeated-field
+                        output
+                        "Sec-WebSocket-Extensions"))
+           (extra-extensions))
+      (dolist (ext extensions)
+        (let ((x (cl-first (split-string ext "; ?"))))
+          (unless (or (member x (websocket-extensions websocket))
+                      (member x extra-extensions))
+            (push x extra-extensions))))
+      (when extra-extensions
+        (signal 'websocket-invalid-header
+                (list (format "Non-requested extensions returned by server: %S"
+                              extra-extensions))))
+      (setf (websocket-negotiated-extensions websocket) extensions)))
+  t)
+
+;;;;;;;;;;;;;;;;;;;;;;
+;; Websocket server ;;
+;;;;;;;;;;;;;;;;;;;;;;
+
+(defvar websocket-server-websockets nil
+  "A list of current websockets live on any server.")
+
+(cl-defun websocket-server (port &rest plist)
+  "Open a websocket server on PORT.
+If the plist contains a `:host' HOST pair, this value will be
+used to configure the addresses the socket listens on. The symbol
+`local' specifies the local host. If unspecified or nil, the
+socket will listen on all addresses.
+
+This also takes a plist of callbacks: `:on-open', `:on-message',
+`:on-close' and `:on-error', which operate exactly as documented
+in the websocket client function `websocket-open'.  Returns the
+connection, which should be kept in order to pass to
+`websocket-server-close'."
+  (let* ((conn (make-network-process
+                :name (format "websocket server on port %s" port)
+                :server t
+                :family 'ipv4
+                :noquery t
+                :filter 'websocket-server-filter
+                :log 'websocket-server-accept
+                :filter-multibyte nil
+                :plist plist
+                :host (plist-get plist :host)
+                :service port)))
+    conn))
+
+(defun websocket-server-close (conn)
+  "Closes the websocket, as well as all open websockets for this server."
+  (let ((to-delete))
+    (dolist (ws websocket-server-websockets)
+      (when (eq (websocket-server-conn ws) conn)
+        (if (eq (websocket-ready-state ws) 'closed)
+            (unless (member ws to-delete)
+              (push ws to-delete))
+          (websocket-close ws))))
+    (dolist (ws to-delete)
+      (setq websocket-server-websockets (remove ws websocket-server-websockets))))
+  (delete-process conn))
+
+(defun websocket-server-accept (server client _message)
+  "Accept a new websocket connection from a client."
+  (let ((ws (websocket-inner-create
+             :server-conn server
+             :conn client
+             :url client
+             :server-p t
+             :on-open (or (process-get server :on-open) 'identity)
+             :on-message (or (process-get server :on-message) (lambda (_ws _frame)))
+             :on-close (let ((user-method
+                              (or (process-get server :on-close) 'identity)))
+                         (lambda (ws)
+                           (setq websocket-server-websockets
+                                 (remove ws websocket-server-websockets))
+                           (funcall user-method ws)))
+             :on-error (or (process-get server :on-error)
+                           'websocket-default-error-handler)
+             :protocols (process-get server :protocol)
+             :extensions (mapcar 'car (process-get server :extensions)))))
+    (unless (member ws websocket-server-websockets)
+      (push ws websocket-server-websockets))
+    (process-put client :websocket ws)
+    (set-process-coding-system client 'binary 'binary)
+    (set-process-sentinel client
+                          (lambda (process change)
+                            (let ((websocket (process-get process :websocket)))
+                              (websocket-debug websocket "State change to %s" change)
+                              (when (and
+                                     (member (process-status process) '(closed failed exit signal))
+                                     (not (eq 'closed (websocket-ready-state websocket))))
+                                (websocket-try-callback 'websocket-on-close 'on-close websocket)))))))
+
+(defun websocket-create-headers (url key protocol extensions custom-headers-alist)
+  "Create connections headers for the given URL, KEY, PROTOCOL, and EXTENSIONS.
+Additionally, the CUSTOM-HEADERS-ALIST is passed from the client.
+All these parameters are defined as in `websocket-open'."
+  (let* ((parsed-url (url-generic-parse-url url))
+         (host-port (if (url-port-if-non-default parsed-url)
+                        (format "%s:%s" (url-host parsed-url) (url-port parsed-url))
+                      (url-host parsed-url)))
+         (cookie-header (url-cookie-generate-header-lines
+                         host-port (car (url-path-and-query parsed-url))
+                         (equal (url-type parsed-url) "wss"))))
+    (format (concat "Host: %s\r\n"
+                    "Upgrade: websocket\r\n"
+                    "Connection: Upgrade\r\n"
+                    "Sec-WebSocket-Key: %s\r\n"
+                    "Sec-WebSocket-Version: 13\r\n"
+                    (when protocol
+                      (concat
+                       (mapconcat
+                        (lambda (protocol)
+                          (format "Sec-WebSocket-Protocol: %s" protocol))
+                        protocol "\r\n")
+                       "\r\n"))
+                    (when extensions
+                      (format "Sec-WebSocket-Extensions: %s\r\n"
+                              (mapconcat
+                               (lambda (ext)
+                                 (concat
+                                  (car ext)
+                                  (when (cdr ext) "; ")
+                                  (when (cdr ext)
+                                    (mapconcat 'identity (cdr ext) "; "))))
+                               extensions ", ")))
+                    (when cookie-header cookie-header)
+                    (concat (mapconcat (lambda (cons) (format "%s: %s" (car cons) (cdr cons)))
+                                       custom-headers-alist "\r\n")
+                            (when custom-headers-alist "\r\n"))
+                    "\r\n")
+            host-port
+            key
+            protocol)))
+
+(defun websocket-get-server-response (websocket client-protocols client-extensions)
+  "Get the websocket response from client WEBSOCKET."
+  (let ((separator "\r\n"))
+      (concat "HTTP/1.1 101 Switching Protocols" separator
+              "Upgrade: websocket" separator
+              "Connection: Upgrade" separator
+              "Sec-WebSocket-Accept: "
+              (websocket-accept-string websocket) separator
+              (let ((protocols
+                         (websocket-intersect client-protocols
+                                              (websocket-protocols websocket))))
+                    (when protocols
+                      (concat
+                       (mapconcat
+                        (lambda (protocol) (format "Sec-WebSocket-Protocol: %s"
+                                              protocol)) protocols separator)
+                       separator)))
+              (let ((extensions (websocket-intersect
+                                   client-extensions
+                                   (websocket-extensions websocket))))
+                  (when extensions
+                    (concat
+                     (mapconcat
+                      (lambda (extension) (format "Sec-Websocket-Extensions: %s"
+                                             extension)) extensions separator)
+                     separator)))
+              separator)))
+
+(defun websocket-server-filter (process output)
+  "This acts on all OUTPUT from websocket clients PROCESS."
+  (let* ((ws (process-get process :websocket))
+         (text (concat (websocket-inflight-input ws) output)))
+    (setf (websocket-inflight-input ws) nil)
+    (cond ((eq (websocket-ready-state ws) 'connecting)
+           ;; check for connection string
+           (let ((end-of-header-pos
+                  (let ((pos (string-match "\r\n\r\n" text)))
+                    (when pos (+ 4 pos)))))
+               (if end-of-header-pos
+                   (progn
+                     (let ((header-info (websocket-verify-client-headers text)))
+                       (if header-info
+                           (progn (setf (websocket-accept-string ws)
+                                        (websocket-calculate-accept
+                                         (plist-get header-info :key)))
+                                  (process-send-string
+                                   process
+                                   (websocket-get-server-response
+                                    ws (plist-get header-info :protocols)
+                                    (plist-get header-info :extensions)))
+                                  (setf (websocket-ready-state ws) 'open)
+                                  (websocket-try-callback 'websocket-on-open
+                                                          'on-open ws))
+                         (message "Invalid client headers found in: %s" output)
+                         (process-send-string process "HTTP/1.1 400 Bad Request\r\n\r\n")
+                         (websocket-close ws)))
+                     (when (> (length text) (+ 1 end-of-header-pos))
+                       (websocket-server-filter process (substring
+                                                           text
+                                                           end-of-header-pos))))
+                 (setf (websocket-inflight-input ws) text))))
+          ((eq (websocket-ready-state ws) 'open)
+           (websocket-process-input-on-open-ws ws text))
+          ((eq (websocket-ready-state ws) 'closed)
+           (message "WARNING: Should not have received further input on closed websocket")))))
+
+(defun websocket-verify-client-headers (output)
+  "Verify the headers from the WEBSOCKET client connection in OUTPUT.
+Unlike `websocket-verify-headers', this is a quieter routine.  We
+don't want to error due to a bad client, so we just print out
+messages and a plist containing `:key', the websocket key,
+`:protocols' and `:extensions'."
+  (cl-block nil
+    (let ((case-fold-search t)
+          (plist))
+      (unless (string-match "HTTP/1.1" output)
+        (message "Websocket client connection: HTTP/1.1 not found")
+        (cl-return nil))
+      (unless (string-match "^Host: " output)
+        (message "Websocket client connection: Host header not found")
+        (cl-return nil))
+      (unless (string-match "^Upgrade: websocket\r\n" output)
+        (message "Websocket client connection: Upgrade: websocket not found")
+        (cl-return nil))
+      (if (string-match "^Sec-WebSocket-Key: \\([[:graph:]]+\\)\r\n" output)
+          (setq plist (plist-put plist :key (match-string 1 output)))
+        (message "Websocket client connect: No key sent")
+        (cl-return nil))
+      (unless (string-match "^Sec-WebSocket-Version: 13" output)
+        (message "Websocket client connect: Websocket version 13 not found")
+        (cl-return nil))
+      (when (string-match "^Sec-WebSocket-Protocol:" output)
+        (setq plist (plist-put plist :protocols (websocket-parse-repeated-field
+                                                 output
+                                                 "Sec-Websocket-Protocol"))))
+      (when (string-match "^Sec-WebSocket-Extensions:" output)
+        (setq plist (plist-put plist :extensions (websocket-parse-repeated-field
+                                                  output
+                                                  "Sec-Websocket-Extensions"))))
+      plist)))
+
+(provide 'websocket)
+
+;;; websocket.el ends here