414 lines
17 KiB
EmacsLisp
414 lines
17 KiB
EmacsLisp
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;;; helm-command.el --- Helm execute-exended-command. -*- lexical-binding: t -*-
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;; Copyright (C) 2012 ~ 2021 Thierry Volpiatto <thierry.volpiatto@gmail.com>
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;; This program is free software; you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation, either version 3 of the License, or
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;; (at your option) any later version.
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;; This program is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with this program. If not, see <http://www.gnu.org/licenses/>.
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;;; Code:
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(require 'cl-lib)
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(require 'helm)
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(require 'helm-help)
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(require 'helm-mode)
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(require 'helm-elisp)
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(defgroup helm-command nil
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"Emacs command related Applications and libraries for Helm."
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:group 'helm)
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(defcustom helm-M-x-always-save-history nil
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"`helm-M-x' save command in `extended-command-history' even when it fails."
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:group 'helm-command
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:type 'boolean)
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(defcustom helm-M-x-reverse-history nil
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"The history source of `helm-M-x' appear in second position when non-nil."
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:group 'helm-command
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:type 'boolean)
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(defcustom helm-M-x-fuzzy-match t
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"Helm-M-x fuzzy matching when non nil."
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:group 'helm-command
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:type 'boolean)
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(defvar helm-M-x-map
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(let ((map (make-sparse-keymap)))
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(set-keymap-parent map helm-comp-read-map)
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(define-key map (kbd "C-u") nil)
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(define-key map (kbd "C-u") 'helm-M-x-universal-argument)
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(define-key map (kbd "C-]") 'helm-M-x-toggle-short-doc)
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map))
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(defcustom helm-M-x-show-short-doc nil
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"Show short docstring of command when non nil.
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This value can be toggled with
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\\<helm-M-x-map>\\[helm-M-x-toggle-short-doc] while in helm-M-x session."
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:group 'helm-command
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:type 'boolean)
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;;; Faces
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;;
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;;
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(defgroup helm-command-faces nil
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"Customize the appearance of helm-command."
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:prefix "helm-"
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:group 'helm-command
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:group 'helm-faces)
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(defface helm-M-x-key
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`((t ,@(and (>= emacs-major-version 27) '(:extend t))
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:foreground "orange" :box (:line-width -1)))
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"Face used in helm-M-x to show keybinding."
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:group 'helm-command-faces)
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(defface helm-command-active-mode
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'((t :inherit font-lock-builtin-face))
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"Face used by `helm-M-x' for activated modes."
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:group 'helm-command-faces)
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(defface helm-M-x-short-doc
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'((t :box (:line-width -1) :foreground "DimGray"))
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"Face used by `helm-M-x' for short docstring."
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:group 'helm-command-faces)
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(defvar helm-M-x-input-history nil)
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(defvar helm-M-x-prefix-argument nil
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"Prefix argument before calling `helm-M-x'.")
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(defvar helm-M-x--timer nil)
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(defvar helm-M-x--unwind-forms-done nil)
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(defun helm-M-x-get-major-mode-command-alist (mode-map)
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"Return alist of MODE-MAP."
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(when mode-map
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(cl-loop for key being the key-seqs of mode-map using (key-bindings com)
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for str-key = (key-description key)
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for ismenu = (string-match "<menu-bar>" str-key)
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unless ismenu collect (cons str-key com))))
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(defun helm-get-mode-map-from-mode (mode)
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"Guess the mode-map name according to MODE.
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Some modes don't use conventional mode-map name so we need to
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guess mode-map name. E.g. `python-mode' ==> py-mode-map.
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Return nil if no mode-map found."
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(cl-loop ;; Start with a conventional mode-map name.
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with mode-map = (intern-soft (format "%s-map" mode))
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with mode-string = (symbol-name mode)
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with mode-name = (replace-regexp-in-string "-mode" "" mode-string)
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while (not mode-map)
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for count downfrom (length mode-name)
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;; Return when no result after parsing entire string.
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when (eq count 0) return nil
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for sub-name = (substring mode-name 0 count)
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do (setq mode-map (intern-soft (format "%s-map" (concat sub-name "-mode"))))
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finally return mode-map))
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(defun helm-M-x-current-mode-map-alist ()
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"Return mode-map alist of current `major-mode'."
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(let ((map-sym (helm-get-mode-map-from-mode major-mode)))
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(when (and map-sym (boundp map-sym))
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(helm-M-x-get-major-mode-command-alist (symbol-value map-sym)))))
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(defun helm-M-x-toggle-short-doc ()
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"Toggle short doc display in helm-M-x."
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(interactive)
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(setq helm-M-x-show-short-doc (not helm-M-x-show-short-doc))
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(helm-update (concat "^" (helm-get-selection)) (helm-get-current-source)))
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(put 'helm-M-x-toggle-short-doc 'no-helm-mx t)
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(defun helm-M-x-transformer-1 (candidates &optional sort ignore-props)
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"Transformer function to show bindings in emacs commands.
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Show global bindings and local bindings according to current
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`major-mode'.
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If SORT is non nil sort list with `helm-generic-sort-fn'.
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Note that SORT should not be used when fuzzy matching because
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fuzzy matching is running its own sort function with a different
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algorithm."
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(with-helm-current-buffer
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(cl-loop with max-len = (when helm-M-x-show-short-doc
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(buffer-local-value 'helm-candidate-buffer-longest-len
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(helm-candidate-buffer)))
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with local-map = (helm-M-x-current-mode-map-alist)
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for cand in candidates
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for local-key = (car (rassq cand local-map))
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for key = (substitute-command-keys (format "\\[%s]" cand))
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for sym = (intern (if (consp cand) (car cand) cand))
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for doc = (when max-len
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(helm-get-first-line-documentation (intern-soft cand)))
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for disp = (if (or (eq sym major-mode)
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(and (memq sym minor-mode-list)
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(boundp sym)
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(buffer-local-value sym helm-current-buffer)))
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(propertize cand 'face 'helm-command-active-mode)
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cand)
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unless (and (null ignore-props) (or (get sym 'helm-only) (get sym 'no-helm-mx)))
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collect
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(cons (cond ((and (string-match "^M-x" key) local-key)
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(format "%s%s%s %s"
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disp
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(if doc (make-string (+ 4 (- max-len (+ (length cand)))) ? ) "")
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(if doc (propertize doc 'face 'helm-M-x-short-doc) "")
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(propertize
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" " 'display
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(propertize local-key 'face 'helm-M-x-key))))
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((string-match "^M-x" key)
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(format "%s%s%s"
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disp
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(if doc (make-string (+ 4 (- max-len (+ (length cand)))) ? ) "")
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(if doc (propertize doc 'face 'helm-M-x-short-doc) "")))
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(t (format "%s%s%s %s"
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disp
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(if doc (make-string (+ 4 (- max-len (+ (length cand)))) ? ) "")
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(if doc (propertize doc 'face 'helm-M-x-short-doc) "")
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(propertize
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" " 'display
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(propertize key 'face 'helm-M-x-key)))))
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cand)
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into ls
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finally return
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(if sort (sort ls #'helm-generic-sort-fn) ls))))
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(defun helm-M-x-transformer (candidates _source)
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"Transformer function for `helm-M-x' candidates."
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;; Generic sort function is handling helm-flex.
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(helm-M-x-transformer-1 candidates (null helm--in-fuzzy)))
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(defun helm-M-x-transformer-no-sort (candidates _source)
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"Transformer function for `helm-M-x' candidates."
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(helm-M-x-transformer-1 candidates))
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(defun helm-M-x-transformer-no-sort-no-props (candidates _source)
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"Transformer function for `helm-M-x' candidates."
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(helm-M-x-transformer-1 candidates nil t))
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(defun helm-M-x--notify-prefix-arg ()
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;; Notify a prefix-arg set AFTER calling M-x.
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(when prefix-arg
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(with-helm-window
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(helm-display-mode-line (helm-get-current-source) 'force))))
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(defun helm-cmd--get-current-function-name ()
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(save-excursion
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(beginning-of-defun)
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(cadr (split-string (buffer-substring-no-properties
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(point-at-bol) (point-at-eol))))))
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(defun helm-cmd--get-preconfigured-commands (&optional dir)
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(let* ((helm-dir (or dir (helm-basedir (locate-library "helm"))))
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(helm-autoload-file (expand-file-name "helm-autoloads.el" helm-dir))
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results)
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(when (file-exists-p helm-autoload-file)
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(with-temp-buffer
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(insert-file-contents helm-autoload-file)
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(while (re-search-forward "Preconfigured" nil t)
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(push (substring (helm-cmd--get-current-function-name) 1) results))))
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results))
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(defun helm-M-x-universal-argument ()
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"Same as `universal-argument' but for `helm-M-x'."
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(interactive)
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(if helm-M-x-prefix-argument
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(progn (setq helm-M-x-prefix-argument nil)
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(let ((inhibit-read-only t))
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(with-selected-window (minibuffer-window)
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(save-excursion
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(goto-char (point-min))
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(delete-char (- (minibuffer-prompt-width) (length "M-x "))))))
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(message "Initial prefix arg disabled"))
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(setq prefix-arg (list 4))
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(universal-argument--mode)))
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(put 'helm-M-x-universal-argument 'helm-only t)
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(defun helm-M-x-persistent-action (candidate)
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(helm-elisp--persistent-help
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candidate 'helm-describe-function))
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(defun helm-M-x--move-selection-after-hook ()
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(setq current-prefix-arg nil))
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(defun helm-M-x--before-action-hook ()
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(remove-hook 'helm-move-selection-after-hook
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'helm-M-x--move-selection-after-hook))
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(defclass helm-M-x-class (helm-source-in-buffer helm-type-command)
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((requires-pattern :initform 0)
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(must-match :initform t)
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(filtered-candidate-transformer :initform 'helm-M-x-transformer-no-sort)
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(persistent-help :initform "Describe this command")
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(help-message :initform 'helm-M-x-help-message)
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(nomark :initform t)
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(cleanup :initform #'helm-M-x--unwind-forms)
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(keymap :initform 'helm-M-x-map)
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(resume :initform 'helm-M-x-resume-fn)))
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(defun helm-M-x-resume-fn ()
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(when (and helm-M-x--timer (timerp helm-M-x--timer))
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(cancel-timer helm-M-x--timer)
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(setq helm-M-x--timer nil))
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(setq helm-M-x--timer (run-at-time 1 0.1 'helm-M-x--notify-prefix-arg))
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(setq helm--mode-line-display-prefarg t)
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;; Prevent displaying a wrong prefix arg when helm-resume is called
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;; from prefix arg.
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(setq current-prefix-arg nil))
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(defun helm-M-x-read-extended-command (collection &optional predicate history)
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"Read or execute action on command name in COLLECTION or HISTORY.
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When `helm-M-x-use-completion-styles' is used, Emacs
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`completion-styles' mechanism is used, otherwise standard helm
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completion and helm fuzzy matching are used together.
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Helm completion is not provided when executing or defining kbd
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macros.
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Arg COLLECTION should be an `obarray' but can be any object
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suitable for `try-completion'. Arg PREDICATE is a function that
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default to `commandp' see also `try-completion'. Arg HISTORY
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default to `extended-command-history'."
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(setq helm--mode-line-display-prefarg t)
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(let* ((pred (or predicate #'commandp))
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(helm-fuzzy-sort-fn (lambda (candidates _source)
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;; Sort on real candidate otherwise
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;; "symbol (<binding>)" is used when sorting.
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(helm-fuzzy-matching-default-sort-fn-1 candidates t)))
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(sources `(,(helm-make-source "Emacs Commands history" 'helm-M-x-class
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:data (lambda ()
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(helm-comp-read-get-candidates
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;; History should be quoted to
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;; force `helm-comp-read-get-candidates'
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;; to use predicate against
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;; symbol and not string.
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(or history 'extended-command-history)
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;; Ensure using empty string to
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;; not defeat helm matching fns [1]
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pred nil nil ""))
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:fuzzy-match helm-M-x-fuzzy-match)
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,(helm-make-source "Emacs Commands" 'helm-M-x-class
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:data (lambda ()
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(helm-comp-read-get-candidates
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;; [1] Same comment as above.
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collection pred nil nil ""))
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:fuzzy-match helm-M-x-fuzzy-match)))
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(prompt (concat (cond
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((eq helm-M-x-prefix-argument '-) "- ")
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((and (consp helm-M-x-prefix-argument)
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(eq (car helm-M-x-prefix-argument) 4)) "C-u ")
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((and (consp helm-M-x-prefix-argument)
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(integerp (car helm-M-x-prefix-argument)))
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(format "%d " (car helm-M-x-prefix-argument)))
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((integerp helm-M-x-prefix-argument)
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(format "%d " helm-M-x-prefix-argument)))
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"M-x ")))
|
|||
|
|
(setq helm-M-x--timer (run-at-time 1 0.1 'helm-M-x--notify-prefix-arg))
|
|||
|
|
;; Fix Bug#2250, add `helm-move-selection-after-hook' which
|
|||
|
|
;; reset prefix arg to nil only for this helm session.
|
|||
|
|
(add-hook 'helm-move-selection-after-hook
|
|||
|
|
'helm-M-x--move-selection-after-hook)
|
|||
|
|
(add-hook 'helm-before-action-hook
|
|||
|
|
'helm-M-x--before-action-hook)
|
|||
|
|
(when (and sources helm-M-x-reverse-history)
|
|||
|
|
(setq sources (nreverse sources)))
|
|||
|
|
(unwind-protect
|
|||
|
|
(progn
|
|||
|
|
(setq current-prefix-arg nil)
|
|||
|
|
(helm :sources sources
|
|||
|
|
:prompt prompt
|
|||
|
|
:buffer "*helm M-x*"
|
|||
|
|
:history 'helm-M-x-input-history))
|
|||
|
|
(helm-M-x--unwind-forms))))
|
|||
|
|
|
|||
|
|
;; When running a command involving again helm from helm-M-x, the
|
|||
|
|
;; unwind-protect UNWINDS forms are executed only once this helm
|
|||
|
|
;; command exit leaving the helm-M-x timer running and other variables
|
|||
|
|
;; and hooks not unset, so the timer is now in a global var and all
|
|||
|
|
;; the forms that should normally run in unwind-protect are running as
|
|||
|
|
;; well as soon as helm-M-x-execute-command is called.
|
|||
|
|
(defun helm-M-x--unwind-forms (&optional done)
|
|||
|
|
;; helm-M-x--unwind-forms-done is non nil when it have been called
|
|||
|
|
;; once from helm-M-x-execute-command.
|
|||
|
|
(unless helm-M-x--unwind-forms-done
|
|||
|
|
(when (timerp helm-M-x--timer)
|
|||
|
|
(cancel-timer helm-M-x--timer)
|
|||
|
|
(setq helm-M-x--timer nil))
|
|||
|
|
(setq helm--mode-line-display-prefarg nil)
|
|||
|
|
;; Be sure to remove it here as well in case of quit.
|
|||
|
|
(remove-hook 'helm-move-selection-after-hook
|
|||
|
|
'helm-M-x--move-selection-after-hook)
|
|||
|
|
(remove-hook 'helm-before-action-hook
|
|||
|
|
'helm-M-x--before-action-hook))
|
|||
|
|
;; Reset helm-M-x--unwind-forms-done to nil when DONE is
|
|||
|
|
;; unspecified.
|
|||
|
|
(setq helm-M-x--unwind-forms-done done))
|
|||
|
|
|
|||
|
|
(defun helm-M-x-execute-command (command)
|
|||
|
|
"Execute COMMAND as an editor command.
|
|||
|
|
COMMAND must be a symbol that satisfies the `commandp' predicate.
|
|||
|
|
Save COMMAND to `extended-command-history'."
|
|||
|
|
(helm-M-x--unwind-forms t)
|
|||
|
|
(when command
|
|||
|
|
;; Avoid having `this-command' set to *exit-minibuffer.
|
|||
|
|
(setq this-command command
|
|||
|
|
;; Handle C-x z (repeat) Bug#322
|
|||
|
|
real-this-command command)
|
|||
|
|
;; If helm-M-x is called with regular emacs completion (kmacro)
|
|||
|
|
;; use the value of arg otherwise use helm-current-prefix-arg.
|
|||
|
|
(let ((prefix-arg (or helm-current-prefix-arg helm-M-x-prefix-argument))
|
|||
|
|
(command-name (symbol-name command)))
|
|||
|
|
(condition-case-unless-debug err
|
|||
|
|
(progn
|
|||
|
|
(command-execute command 'record)
|
|||
|
|
(add-to-history 'extended-command-history command-name))
|
|||
|
|
(error
|
|||
|
|
(when helm-M-x-always-save-history
|
|||
|
|
(add-to-history 'extended-command-history command-name))
|
|||
|
|
(signal (car err) (cdr err)))))))
|
|||
|
|
|
|||
|
|
(defun helm-M-x--vanilla-M-x ()
|
|||
|
|
(helm-M-x-execute-command
|
|||
|
|
(intern-soft
|
|||
|
|
(if helm-mode
|
|||
|
|
(unwind-protect
|
|||
|
|
(progn
|
|||
|
|
(helm-mode -1)
|
|||
|
|
(read-extended-command))
|
|||
|
|
(helm-mode 1))
|
|||
|
|
(read-extended-command)))))
|
|||
|
|
|
|||
|
|
;;;###autoload
|
|||
|
|
(defun helm-M-x (_arg)
|
|||
|
|
"Preconfigured `helm' for Emacs commands.
|
|||
|
|
It is `helm' replacement of regular `M-x'
|
|||
|
|
`execute-extended-command'.
|
|||
|
|
|
|||
|
|
Unlike regular `M-x' Emacs vanilla `execute-extended-command'
|
|||
|
|
command, the prefix args if needed, can be passed AFTER starting
|
|||
|
|
`helm-M-x'. When a prefix arg is passed BEFORE starting
|
|||
|
|
`helm-M-x', the first `C-u' while in `helm-M-x' session will
|
|||
|
|
disable it.
|
|||
|
|
|
|||
|
|
You can get help on each command by persistent action."
|
|||
|
|
(interactive
|
|||
|
|
(progn
|
|||
|
|
(setq helm-M-x-prefix-argument current-prefix-arg)
|
|||
|
|
(list current-prefix-arg)))
|
|||
|
|
(if (or defining-kbd-macro executing-kbd-macro)
|
|||
|
|
(helm-M-x--vanilla-M-x)
|
|||
|
|
(helm-M-x-read-extended-command obarray)))
|
|||
|
|
(put 'helm-M-x 'interactive-only 'command-execute)
|
|||
|
|
|
|||
|
|
(provide 'helm-command)
|
|||
|
|
|
|||
|
|
;;; helm-command.el ends here
|