forked from emacs-helm/helm
-
Notifications
You must be signed in to change notification settings - Fork 0
/
helm-command.el
256 lines (220 loc) · 9.99 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
;;; helm-command.el --- Helm execute-exended-command. -*- lexical-binding: t -*-
;; Copyright (C) 2012 ~ 2015 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-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.")
;;; 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)
(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))
(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
(let ((msg "Error: Specifying a prefix arg before calling `helm-M-x'"))
(when current-prefix-arg
(ding)
(message "%s" msg)
(while (not (sit-for 1))
(discard-input))
(user-error msg))
(setq current-prefix-arg nil)
(helm-comp-read
"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
: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, are passed AFTER starting `helm-M-x'.
You can get help on each command by persistent action."
(interactive (list current-prefix-arg (helm-M-x-read-extended-command)))
(let ((sym-com (and (stringp command-name) (intern-soft command-name))))
;; 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 arg)))
;; 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)))))
(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