418 lines
17 KiB
EmacsLisp
418 lines
17 KiB
EmacsLisp
;;; helm-command.el --- Helm execute-exended-command. -*- lexical-binding: t -*-
|
||
|
||
;; Copyright (C) 2012 ~ 2023 Thierry Volpiatto
|
||
|
||
;; 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/>.
|
||
|
||
;;; Code:
|
||
|
||
(require 'cl-lib)
|
||
(require 'helm)
|
||
(require 'helm-help)
|
||
(require 'helm-mode)
|
||
(require 'helm-elisp)
|
||
|
||
|
||
(defvar helm-M-x-map
|
||
(let ((map (make-sparse-keymap)))
|
||
(set-keymap-parent map helm-comp-read-map)
|
||
(define-key map (kbd "C-u") nil)
|
||
(define-key map (kbd "C-u") #'helm-M-x-universal-argument)
|
||
(define-key map (kbd "C-]") #'helm-M-x-toggle-short-doc)
|
||
map))
|
||
|
||
|
||
(defgroup helm-command nil
|
||
"Emacs command related Applications and libraries for Helm."
|
||
:group 'helm)
|
||
|
||
(defcustom helm-M-x-always-save-history nil
|
||
"`helm-M-x' save command in `extended-command-history' even when it fails."
|
||
:type 'boolean)
|
||
|
||
(defcustom helm-M-x-reverse-history nil
|
||
"The history source of `helm-M-x' appear in second position when non-nil."
|
||
:type 'boolean)
|
||
|
||
(defcustom helm-M-x-fuzzy-match t
|
||
"Helm-M-x fuzzy matching when non nil."
|
||
:type 'boolean)
|
||
|
||
(defcustom helm-M-x-show-short-doc nil
|
||
"Show short docstring of command when non nil.
|
||
This value can be toggled with
|
||
\\<helm-M-x-map>\\[helm-M-x-toggle-short-doc] while in helm-M-x session."
|
||
:type 'boolean)
|
||
|
||
|
||
;;; Faces
|
||
;;
|
||
;;
|
||
(defgroup helm-command-faces nil
|
||
"Customize the appearance of helm-command."
|
||
:prefix "helm-"
|
||
:group 'helm-command
|
||
:group 'helm-faces)
|
||
|
||
(defface helm-M-x-key
|
||
`((t ,@(and (>= emacs-major-version 27) '(:extend t))
|
||
:foreground "orange" :box (:line-width -1)))
|
||
"Face used in helm-M-x to show keybinding."
|
||
:group 'helm-command-faces)
|
||
|
||
(defface helm-command-active-mode
|
||
'((t :inherit font-lock-builtin-face))
|
||
"Face used by `helm-M-x' for activated modes."
|
||
:group 'helm-command-faces)
|
||
|
||
(defface helm-M-x-short-doc
|
||
'((t :box (:line-width -1) :foreground "DimGray"))
|
||
"Face used by `helm-M-x' for short docstring."
|
||
:group 'helm-command-faces)
|
||
|
||
(defvar helm-M-x-input-history nil)
|
||
(defvar helm-M-x-prefix-argument nil
|
||
"Prefix argument before calling `helm-M-x'.")
|
||
(defvar helm-M-x--timer nil)
|
||
(defvar helm-M-x--unwind-forms-done nil)
|
||
|
||
(defun helm-M-x-get-major-mode-command-alist (mode-map)
|
||
"Return alist of MODE-MAP."
|
||
(when mode-map
|
||
(cl-loop for key being the key-seqs of mode-map using (key-bindings com)
|
||
for str-key = (key-description key)
|
||
for ismenu = (string-match "<menu-bar>" str-key)
|
||
unless ismenu collect (cons str-key com))))
|
||
|
||
(defun helm-get-mode-map-from-mode (mode)
|
||
"Guess the mode-map name according to MODE.
|
||
Some modes don't use conventional mode-map name so we need to
|
||
guess mode-map name. E.g. `python-mode' ==> py-mode-map.
|
||
Return nil if no mode-map found."
|
||
(cl-loop ;; Start with a conventional mode-map name.
|
||
with mode-map = (intern-soft (format "%s-map" mode))
|
||
with mode-string = (symbol-name mode)
|
||
with mode-name = (replace-regexp-in-string "-mode" "" mode-string)
|
||
while (not mode-map)
|
||
for count downfrom (length mode-name)
|
||
;; Return when no result after parsing entire string.
|
||
when (eq count 0) return nil
|
||
for sub-name = (substring mode-name 0 count)
|
||
do (setq mode-map (intern-soft (format "%s-map" (concat sub-name "-mode"))))
|
||
finally return mode-map))
|
||
|
||
(defun helm-M-x-current-mode-map-alist ()
|
||
"Return mode-map alist of current `major-mode'."
|
||
(let ((map-sym (helm-get-mode-map-from-mode major-mode)))
|
||
(when (and map-sym (boundp map-sym))
|
||
(helm-M-x-get-major-mode-command-alist (symbol-value map-sym)))))
|
||
|
||
(defun helm-M-x-toggle-short-doc ()
|
||
"Toggle short doc display in helm-M-x."
|
||
(interactive)
|
||
(setq helm-M-x-show-short-doc (not helm-M-x-show-short-doc))
|
||
(helm-force-update (concat "^" (helm-get-selection)) (helm-get-current-source)))
|
||
(put 'helm-M-x-toggle-short-doc 'no-helm-mx t)
|
||
|
||
(defun helm-M-x-transformer-1 (candidates &optional sort ignore-props)
|
||
"Transformer function to show bindings in emacs commands.
|
||
Show global bindings and local bindings according to current
|
||
`major-mode'.
|
||
If SORT is non nil sort list with `helm-generic-sort-fn'.
|
||
Note that SORT should not be used when fuzzy matching because
|
||
fuzzy matching is running its own sort function with a different
|
||
algorithm."
|
||
(with-helm-current-buffer
|
||
(cl-loop with local-map = (helm-M-x-current-mode-map-alist)
|
||
for cand in candidates
|
||
for local-key = (car (rassq cand local-map))
|
||
for key = (substitute-command-keys (format "\\[%s]" cand))
|
||
for sym = (intern (if (consp cand) (car cand) cand))
|
||
for doc = (when helm-M-x-show-short-doc
|
||
(helm-get-first-line-documentation (intern-soft cand)))
|
||
for disp = (if (or (eq sym major-mode)
|
||
(and (memq sym minor-mode-list)
|
||
(boundp sym)
|
||
(buffer-local-value
|
||
sym helm-current-buffer)))
|
||
(propertize cand 'face 'helm-command-active-mode)
|
||
cand)
|
||
unless (and (null ignore-props)
|
||
(or (get sym 'helm-only) (get sym 'no-helm-mx)))
|
||
collect
|
||
(cons (cond ((and (string-match "^M-x" key) local-key)
|
||
(propertize
|
||
(format "%s%s%s %s"
|
||
disp
|
||
(if doc (helm-make-separator cand) "")
|
||
(if doc
|
||
(propertize
|
||
doc 'face 'helm-M-x-short-doc)
|
||
"")
|
||
(propertize
|
||
" " 'display
|
||
(propertize local-key 'face 'helm-M-x-key)))
|
||
'match-part disp))
|
||
((and (string-match "^M-x" key)
|
||
(not (string= key "M-x")))
|
||
(propertize
|
||
(format "%s%s%s"
|
||
disp
|
||
(if doc (helm-make-separator cand) "")
|
||
(if doc
|
||
(propertize
|
||
doc 'face 'helm-M-x-short-doc)
|
||
""))
|
||
'match-part disp))
|
||
(t (propertize
|
||
(format "%s%s%s %s"
|
||
disp
|
||
(if doc (helm-make-separator cand) "")
|
||
(if doc
|
||
(propertize
|
||
doc 'face 'helm-M-x-short-doc)
|
||
"")
|
||
(propertize
|
||
" " 'display
|
||
(propertize key 'face 'helm-M-x-key)))
|
||
'match-part disp)))
|
||
cand)
|
||
into ls
|
||
finally return
|
||
(if sort (sort ls #'helm-generic-sort-fn) ls))))
|
||
|
||
(defun helm-M-x-transformer (candidates _source)
|
||
"Transformer function for `helm-M-x' candidates."
|
||
;; Generic sort function is handling helm-flex.
|
||
(helm-M-x-transformer-1 candidates (null helm--in-fuzzy)))
|
||
|
||
(defun helm-M-x-transformer-no-sort (candidates _source)
|
||
"Transformer function for `helm-M-x' candidates."
|
||
(helm-M-x-transformer-1 candidates))
|
||
|
||
(defun helm-M-x-transformer-no-sort-no-props (candidates _source)
|
||
"Transformer function for `helm-M-x' candidates."
|
||
(helm-M-x-transformer-1 candidates nil t))
|
||
|
||
(defun helm-M-x--notify-prefix-arg ()
|
||
;; Notify a prefix-arg set AFTER calling M-x.
|
||
(when prefix-arg
|
||
(with-helm-window
|
||
(helm-display-mode-line (helm-get-current-source) 'force))))
|
||
|
||
(defun helm-cmd--get-current-function-name ()
|
||
(save-excursion
|
||
(beginning-of-defun)
|
||
(cadr (split-string (buffer-substring-no-properties
|
||
(pos-bol) (pos-eol))))))
|
||
|
||
(defun helm-cmd--get-preconfigured-commands (&optional dir)
|
||
(let* ((helm-dir (or dir (helm-basedir (locate-library "helm"))))
|
||
(helm-autoload-file (expand-file-name "helm-autoloads.el" helm-dir))
|
||
results)
|
||
(when (file-exists-p helm-autoload-file)
|
||
(with-temp-buffer
|
||
(insert-file-contents helm-autoload-file)
|
||
(while (re-search-forward "Preconfigured" nil t)
|
||
(push (substring (helm-cmd--get-current-function-name) 1) results))))
|
||
results))
|
||
|
||
(defun helm-M-x-universal-argument ()
|
||
"Same as `universal-argument' but for `helm-M-x'."
|
||
(interactive)
|
||
(if helm-M-x-prefix-argument
|
||
(progn (setq helm-M-x-prefix-argument nil)
|
||
(let ((inhibit-read-only t))
|
||
(with-selected-window (minibuffer-window)
|
||
(save-excursion
|
||
(goto-char (point-min))
|
||
(delete-char (- (minibuffer-prompt-width) (length "M-x "))))))
|
||
(message "Initial prefix arg disabled"))
|
||
(setq prefix-arg (list 4))
|
||
(universal-argument--mode)))
|
||
(put 'helm-M-x-universal-argument 'helm-only t)
|
||
|
||
(defun helm-M-x-persistent-action (candidate)
|
||
(helm-elisp--persistent-help
|
||
candidate 'helm-describe-function))
|
||
|
||
(defun helm-M-x--move-selection-after-hook ()
|
||
(setq current-prefix-arg nil))
|
||
|
||
(defun helm-M-x--before-action-hook ()
|
||
(remove-hook 'helm-move-selection-after-hook
|
||
#'helm-M-x--move-selection-after-hook))
|
||
|
||
(defclass helm-M-x-class (helm-source-in-buffer helm-type-command)
|
||
((requires-pattern :initform 0)
|
||
(must-match :initform t)
|
||
(filtered-candidate-transformer :initform 'helm-M-x-transformer)
|
||
(persistent-help :initform "Describe this command")
|
||
(help-message :initform 'helm-M-x-help-message)
|
||
(nomark :initform t)
|
||
(cleanup :initform #'helm-M-x--unwind-forms)
|
||
(keymap :initform 'helm-M-x-map)
|
||
(resume :initform 'helm-M-x-resume-fn)))
|
||
|
||
(defun helm-M-x-resume-fn ()
|
||
(when (and helm-M-x--timer (timerp helm-M-x--timer))
|
||
(cancel-timer helm-M-x--timer)
|
||
(setq helm-M-x--timer nil))
|
||
(setq helm-M-x--timer (run-at-time 1 0.1 #'helm-M-x--notify-prefix-arg))
|
||
(setq helm--mode-line-display-prefarg t)
|
||
;; Prevent displaying a wrong prefix arg when helm-resume is called
|
||
;; from prefix arg.
|
||
(setq current-prefix-arg nil))
|
||
|
||
(defun helm-M-x-read-extended-command (collection &optional predicate history)
|
||
"Read or execute action on command name in COLLECTION or HISTORY.
|
||
|
||
Helm completion is not provided when executing or defining kbd macros.
|
||
|
||
Arg COLLECTION should be an `obarray'.
|
||
Arg PREDICATE is a function that default to `commandp'.
|
||
Arg HISTORY default to `extended-command-history'."
|
||
(setq helm--mode-line-display-prefarg t)
|
||
(let* ((pred (or predicate #'commandp))
|
||
(helm-fuzzy-sort-fn (lambda (candidates _source)
|
||
;; Sort on real candidate otherwise
|
||
;; "symbol (<binding>)" is used when sorting.
|
||
(helm-fuzzy-matching-default-sort-fn-1 candidates t)))
|
||
(sources `(,(helm-make-source "Emacs Commands history" 'helm-M-x-class
|
||
:data (lambda ()
|
||
(helm-comp-read-get-candidates
|
||
;; History should be quoted to
|
||
;; force `helm-comp-read-get-candidates'
|
||
;; to use predicate against
|
||
;; symbol and not string.
|
||
(or history 'extended-command-history)
|
||
;; Ensure using empty string to
|
||
;; not defeat helm matching fns [1]
|
||
pred nil nil ""))
|
||
:fuzzy-match helm-M-x-fuzzy-match)
|
||
,(helm-make-source "Emacs Commands" 'helm-M-x-class
|
||
:data (lambda ()
|
||
(helm-comp-read-get-candidates
|
||
;; [1] Same comment as above.
|
||
collection pred nil nil ""))
|
||
:fuzzy-match helm-M-x-fuzzy-match)))
|
||
(prompt (concat (helm-acase helm-M-x-prefix-argument
|
||
(- "-")
|
||
((guard (and (consp it) (car it)))
|
||
(if (eq guard 4) "C-u " (format "%d " guard)))
|
||
((guard (integerp it)) (format "%d " it)))
|
||
"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
|
||
:truncate-lines t))
|
||
(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
|
||
helm-fuzzy-sort-fn (default-toplevel-value 'helm-fuzzy-sort-fn))
|
||
;; 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
|