forked from emacs-helm/helm
-
Notifications
You must be signed in to change notification settings - Fork 0
/
helm-command.el
360 lines (315 loc) · 14.2 KB
/
helm-command.el
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
;;; helm-command.el --- Helm execute-exended-command. -*- lexical-binding: t -*-
;; Copyright (C) 2012 ~ 2019 Thierry Volpiatto <[email protected]>
;; 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-always-save-history nil
"`helm-M-x' save command in `extended-command-history' even when it fails."
: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)
;;; 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" :underline t))
"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)
(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-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))
for sym = (intern 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 (get (intern (if (consp cand) (car cand) cand)) 'helm-only)
collect
(cons (cond ((and (string-match "^M-x" key) local-key)
(format "%s (%s)"
disp (propertize
local-key
'face 'helm-M-x-key)))
((string-match "^M-x" key) disp)
(t (format "%s (%s)"
disp (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."
;; 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--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-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-sync helm-type-command)
((match-dynamic :initform t)
(requires-pattern :initform 0)
(must-match :initform t)
(filtered-candidate-transformer :initform 'helm-M-x-transformer-no-sort)
(persistent-help :initform "Describe this command")
(help-message :initform 'helm-M-x-help-message)
(nomark :initform t)
(keymap :initform helm-M-x-map)))
(defun helm-M-x-read-extended-command (collection &optional predicate history)
"Read or execute action on command name in COLLECTION or HISTORY.
When `helm-M-x-use-completion-styles' is used, several actions as
of `helm-type-command' are used and executed from here, otherwise
this function returns the command as a symbol.
Helm completion is not provided when executing or defining kbd
macros.
Arg COLLECTION should be an `obarray' but can be any object
suitable for `try-completion'. Arg PREDICATE is a function that
default to `commandp' see also `try-completion'. Arg HISTORY
default to `extended-command-history'."
(let* ((helm--mode-line-display-prefarg t)
(minibuffer-completion-confirm t)
(pred (or predicate #'commandp))
(metadata (unless (assq 'flex completion-styles-alist)
'(metadata (display-sort-function
.
(lambda (candidates)
(sort candidates #'helm-generic-sort-fn))))))
(sources `(,(helm-make-source "Emacs Commands history" 'helm-M-x-class
:candidates (helm-dynamic-completion
;; A list of strings.
(or history extended-command-history)
(lambda (str) (funcall pred (intern-soft str)))
nil 'nosort t))
,(helm-make-source "Emacs Commands" 'helm-M-x-class
:candidates (helm-dynamic-completion
collection pred
nil metadata t))))
(prompt (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 ")))
(setq helm-M-x--timer (run-at-time 1 0.1 'helm-M-x--notify-prefix-arg))
;; Fix Issue #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) Issue #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)
;; Local Variables:
;; byte-compile-warnings: (not obsolete)
;; coding: utf-8
;; indent-tabs-mode: nil
;; End:
;;; helm-command.el ends here