294 lines
12 KiB
EmacsLisp
294 lines
12 KiB
EmacsLisp
;;; helm-command.el --- Helm execute-exended-command. -*- lexical-binding: t -*-
|
||
|
||
;; Copyright (C) 2012 ~ 2016 Thierry Volpiatto <thierry.volpiatto@gmail.com>
|
||
|
||
;; 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)
|
||
|
||
|
||
(defgroup helm-command nil
|
||
"Emacs command related Applications and libraries for Helm."
|
||
:group 'helm)
|
||
|
||
(defcustom helm-M-x-requires-pattern 0
|
||
"Value of requires-pattern for `helm-M-x'.
|
||
Show all candidates on startup when 0 (default)."
|
||
:group 'helm-command
|
||
:type 'boolean)
|
||
|
||
(defcustom helm-M-x-always-save-history nil
|
||
"`helm-M-x' Save command in `extended-command-history' even when it fail."
|
||
:group 'helm-command
|
||
:type 'boolean)
|
||
|
||
(defcustom helm-M-x-reverse-history nil
|
||
"The history source of `helm-M-x' appear in second position when non--nil."
|
||
:group 'helm-command
|
||
:type 'boolean)
|
||
|
||
(defcustom helm-M-x-fuzzy-match nil
|
||
"Enable fuzzy matching in `helm-M-x' when non--nil."
|
||
:group 'helm-command
|
||
: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 (:foreground "orange" :underline t)))
|
||
"Face used in helm-M-x to show keybinding."
|
||
: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'.")
|
||
|
||
|
||
(cl-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-transformer-1 (candidates &optional sort)
|
||
"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))
|
||
unless (get (intern (if (consp cand) (car cand) cand)) 'helm-only)
|
||
collect
|
||
(cons (cond ((and (string-match "^M-x" key) local-key)
|
||
(format "%s (%s)"
|
||
cand (propertize
|
||
local-key
|
||
'face 'helm-M-x-key)))
|
||
((string-match "^M-x" key) cand)
|
||
(t (format "%s (%s)"
|
||
cand (propertize
|
||
key
|
||
'face 'helm-M-x-key))))
|
||
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."
|
||
(helm-M-x-transformer-1 candidates (null helm--in-fuzzy)))
|
||
|
||
(defun helm-M-x-transformer-hist (candidates _source)
|
||
"Transformer function for `helm-M-x' candidates."
|
||
(helm-M-x-transformer-1 candidates))
|
||
|
||
(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
|
||
(point-at-bol) (point-at-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))
|
||
|
||
(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)
|
||
map))
|
||
|
||
(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-read-extended-command (&optional collection history)
|
||
"Read command name to invoke in `helm-M-x'.
|
||
Helm completion is not provided when executing or defining
|
||
kbd macros.
|
||
Optional arg COLLECTION is to allow using another COLLECTION
|
||
than the default which is OBARRAY."
|
||
(if (or defining-kbd-macro executing-kbd-macro)
|
||
(if helm-mode
|
||
(unwind-protect
|
||
(progn
|
||
(helm-mode -1)
|
||
(read-extended-command))
|
||
(helm-mode 1))
|
||
(read-extended-command))
|
||
(let* ((orig-fuzzy-sort-fn helm-fuzzy-sort-fn)
|
||
(helm-fuzzy-sort-fn (lambda (candidates source)
|
||
(funcall orig-fuzzy-sort-fn
|
||
candidates source 'real)))
|
||
(helm--mode-line-display-prefarg t)
|
||
(tm (run-at-time 1 0.1 'helm-M-x--notify-prefix-arg))
|
||
(helm-move-selection-after-hook
|
||
(cons (lambda () (setq current-prefix-arg nil))
|
||
helm-move-selection-after-hook)))
|
||
(setq extended-command-history
|
||
(cl-loop for c in extended-command-history
|
||
when (and c (commandp (intern c)))
|
||
do (set-text-properties 0 (length c) nil c)
|
||
and collect c))
|
||
(unwind-protect
|
||
(progn
|
||
(setq current-prefix-arg nil)
|
||
(helm-comp-read
|
||
(concat (cond
|
||
((eq helm-M-x-prefix-argument '-) "- ")
|
||
((and (consp helm-M-x-prefix-argument)
|
||
(eq (car helm-M-x-prefix-argument) 4)) "C-u ")
|
||
((and (consp helm-M-x-prefix-argument)
|
||
(integerp (car helm-M-x-prefix-argument)))
|
||
(format "%d " (car helm-M-x-prefix-argument)))
|
||
((integerp helm-M-x-prefix-argument)
|
||
(format "%d " helm-M-x-prefix-argument)))
|
||
"M-x ")
|
||
(or collection obarray)
|
||
:test 'commandp
|
||
:requires-pattern helm-M-x-requires-pattern
|
||
:name "Emacs Commands"
|
||
:buffer "*helm M-x*"
|
||
:persistent-action (lambda (candidate)
|
||
(helm-elisp--persistent-help
|
||
candidate 'helm-describe-function))
|
||
:persistent-help "Describe this command"
|
||
:history (or history extended-command-history)
|
||
:reverse-history helm-M-x-reverse-history
|
||
:input-history 'helm-M-x-input-history
|
||
:del-input nil
|
||
:help-message 'helm-M-x-help-message
|
||
:keymap helm-M-x-map
|
||
:must-match t
|
||
:fuzzy helm-M-x-fuzzy-match
|
||
:nomark t
|
||
:candidates-in-buffer t
|
||
:fc-transformer 'helm-M-x-transformer
|
||
:hist-fc-transformer 'helm-M-x-transformer-hist))
|
||
(cancel-timer tm)
|
||
(setq helm--mode-line-display-prefarg nil)))))
|
||
|
||
;;;###autoload
|
||
(defun helm-M-x (_arg &optional command-name)
|
||
"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 (helm-M-x-read-extended-command))))
|
||
(let ((sym-com (and (stringp command-name) (intern-soft command-name))))
|
||
(when sym-com
|
||
;; Avoid having `this-command' set to *exit-minibuffer.
|
||
(setq this-command sym-com
|
||
;; Handle C-x z (repeat) Issue #322
|
||
real-this-command sym-com)
|
||
;; 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)))
|
||
;; This ugly construct is to save history even on error.
|
||
(unless helm-M-x-always-save-history
|
||
(command-execute sym-com 'record))
|
||
(setq extended-command-history
|
||
(cons command-name
|
||
(delete command-name extended-command-history)))
|
||
(when helm-M-x-always-save-history
|
||
(command-execute sym-com 'record))))))
|
||
(put 'helm-M-x 'interactive-only 'command-execute)
|
||
|
||
(provide 'helm-command)
|
||
|
||
;; Local Variables:
|
||
;; byte-compile-warnings: (not cl-functions obsolete)
|
||
;; coding: utf-8
|
||
;; indent-tabs-mode: nil
|
||
;; End:
|
||
|
||
;;; helm-command.el ends here
|