forked from emacs-helm/helm
-
Notifications
You must be signed in to change notification settings - Fork 0
/
helm-dabbrev.el
402 lines (364 loc) · 16.9 KB
/
helm-dabbrev.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
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
;;; helm-dabbrev.el --- Helm implementation of dabbrev. -*- 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 'helm)
(require 'helm-lib)
(require 'helm-help)
(require 'helm-elisp) ; For show-completion.
(defgroup helm-dabbrev nil
"Dabbrev related Applications and libraries for Helm."
:group 'helm)
(defcustom helm-dabbrev-always-search-all t
"Always search in all buffers when non--nil.
Note that even if nil, a search in all buffers will occur if the
length of candidates is <= than
`helm-dabbrev-max-length-result'."
:group 'helm-dabbrev
:type 'boolean)
(defcustom helm-dabbrev-candidates-number-limit 1000
"Maximum number of candidates to collect.
The higher this number is, the slower the computation of
candidates will be. You can use safely a higher value with
emacs-26+.
Note that this have nothing to do with
`helm-candidate-number-limit', this means that computation of
candidates stop when this value is reached but only
`helm-candidate-number-limit' candidates are displayed in the
Helm buffer."
:group 'helm-dabbrev
:type 'integer)
(defcustom helm-dabbrev-ignored-buffers-regexps
'("\\*helm" "\\*Messages" "\\*Echo Area" "\\*Buffer List")
"List of regexps matching names of buffers that `helm-dabbrev' should not check."
:group 'helm-dabbrev
:type '(repeat regexp))
(defcustom helm-dabbrev-related-buffer-fn #'helm-dabbrev--same-major-mode-p
"A function that decide if a buffer to search in its related to `current-buffer'.
This is actually determined by comparing `major-mode' of the
buffer to search and the `current-buffer'.
The function take one arg, the buffer which is current, look at
`helm-dabbrev--same-major-mode-p' for an example.
When nil all buffers are considered related to `current-buffer'."
:group 'helm-dabbrev
:type 'function)
(defcustom helm-dabbrev-major-mode-assoc nil
"Major mode association alist.
This allow helm-dabbrev searching in buffers with the associated
`major-mode'.
E.g. \(emacs-lisp-mode . lisp-interaction-mode\)
will allow searching in the lisp-interaction-mode buffer when
`current-buffer' is an `emacs-lisp-mode' buffer and vice versa
i.e. no need to provide \(lisp-interaction-mode .
emacs-lisp-mode\) association.
When nil check is the searched buffer has same `major-mode' than
the `current-buffer'.
This has no effect when `helm-dabbrev-related-buffer-fn' is nil
or of course bound to a function that doesn't handle this var."
:type '(alist :key-type symbol :value-type symbol)
:group 'helm-dabbrev)
(defcustom helm-dabbrev-lineno-around 30
"Search first in this number of lines before and after point."
:group 'helm-dabbrev
:type 'integer)
(defcustom helm-dabbrev-cycle-threshold 5
"Number of time helm-dabbrev cycle before displaying helm completion.
When nil or 0 disable cycling."
:group 'helm-dabbrev
:type '(choice (const :tag "Cycling disabled" nil) integer))
(defcustom helm-dabbrev-case-fold-search 'smart
"Set `case-fold-search' in `helm-dabbrev'.
Same as `helm-case-fold-search' but for `helm-dabbrev'.
Note that this is not affecting searching in Helm buffer, but the
initial search for all candidates in buffer(s)."
:group 'helm-dabbrev
:type '(choice (const :tag "Ignore case" t)
(const :tag "Respect case" nil)
(other :tag "Smart" 'smart)))
(defvaralias 'helm-dabbrev--regexp 'helm-dabbrev-separator-regexp)
(make-obsolete-variable 'helm-dabbrev--regexp
'helm-dabbrev-separator-regexp "2.8.3")
;; Check for beginning of line should happen last (^\n\\|^).
(defvar helm-dabbrev-separator-regexp
"\\s-\\|\t\\|[(\\[\\{\"'`=<$;,@.#+]\\|\\s\\\\|^\n\\|^"
"Regexp matching the start of a dabbrev candidate.")
(defvar helm-dabbrev-map
(let ((map (make-sparse-keymap)))
(set-keymap-parent map helm-map)
(define-key map (kbd "M-/") 'helm-next-line)
(define-key map (kbd "M-:") 'helm-previous-line)
map))
;; Internal
(defvar helm-dabbrev--cache nil)
(defvar helm-dabbrev--data nil)
(cl-defstruct helm-dabbrev-info dabbrev limits iterator)
(defvar helm-dabbrev--already-tried nil)
(defvar helm-dabbrev--computing-cache nil
"[INTERNAL] Flag to notify helm-dabbrev is blocked.
Do nothing when non nil.")
(defun helm-dabbrev--buffer-list ()
(cl-loop for buf in (buffer-list)
unless (cl-loop for r in helm-dabbrev-ignored-buffers-regexps
thereis (string-match r (buffer-name buf)))
collect buf))
(defun helm-dabbrev--same-major-mode-p (start-buffer)
"Decide if current-buffer is related to START-BUFFER."
(helm-same-major-mode-p start-buffer helm-dabbrev-major-mode-assoc))
(defun helm-dabbrev--collect (str limit ignore-case all)
(let* ((case-fold-search ignore-case)
(buffer1 (current-buffer)) ; start buffer.
(minibuf (minibufferp buffer1))
results pos-before pos-after)
(catch 'break
(dolist (buf (if all (helm-dabbrev--buffer-list)
(list (current-buffer))))
(with-current-buffer buf
(when (or minibuf ; check against all buffers when in minibuffer.
(if helm-dabbrev-related-buffer-fn
(funcall helm-dabbrev-related-buffer-fn buffer1)
t))
(save-excursion
;; Start searching before thing before point.
(goto-char (- (point) (length str)))
;; Search the last 30 lines BEFORE point and set POS-BEFORE.
(cl-multiple-value-bind (res _pa pb)
(helm-dabbrev--search-and-store str -2 limit results)
(setq results res
;; No need to set POS-AFTER here.
pos-before pb)))
(save-excursion
;; Search the next 30 lines AFTER point and set POS-AFTER.
(cl-multiple-value-bind (res pa _pb)
(helm-dabbrev--search-and-store str 2 limit results)
(setq results res
;; No need to set POS-BEFORE, we keep the last
;; value found.
pos-after pa)))
(save-excursion
;; Search all BEFORE point maybe starting from
;; POS-BEFORE to not search again what previously found.
;; If limit is reached in previous call of
;; `helm-dabbrev--search-and-store' POS-BEFORE is nil and
;; goto-char will fail, so check it.
(when pos-before (goto-char pos-before))
(cl-multiple-value-bind (res _pa _pb)
(helm-dabbrev--search-and-store str -1 limit results)
;; No need to set POS-BEFORE and POS-AFTER here.
(setq results res)))
(save-excursion
;; Search all AFTER point maybe starting from POS-AFTER.
;; Same comment as above for POS-AFTER.
(when pos-after (goto-char pos-after))
(cl-multiple-value-bind (res _pa _pb)
(helm-dabbrev--search-and-store str 1 limit results)
;; No need to set POS-BEFORE and POS-AFTER here.
(setq results res)))))
(when (>= (length results) limit) (throw 'break nil))))
(nreverse results)))
(defun helm-dabbrev--search-and-store (pattern direction limit results)
"Search words or symbols matching PATTERN in DIRECTION up to LIMIT.
Finally returns all matched candidates appended to RESULTS.
Argument DIRECTION can be:
- (1): Search forward from point.
- (-1): Search backward from point.
- (2): Search forward from the
`helm-dabbrev-lineno-around'
lines after point.
- (-2): Search backward from the
`helm-dabbrev-lineno-around'
lines before point."
(let ((res results)
after before)
(while (and (<= (length res) limit)
(cl-case direction
(1 (search-forward pattern nil t))
(-1 (search-backward pattern nil t))
(2 (let ((pos
(save-excursion
(forward-line
helm-dabbrev-lineno-around)
(point))))
(setq after pos)
(search-forward pattern pos t)))
(-2 (let ((pos
(save-excursion
(forward-line
(- helm-dabbrev-lineno-around))
(point))))
(setq before pos)
(search-backward pattern pos t)))))
(let* ((mb (match-beginning 0))
(replace-regexp (concat "\\(" helm-dabbrev-separator-regexp
"\\)\\'"))
(match-word (helm-dabbrev--search
pattern mb replace-regexp)))
(when (and match-word (not (member match-word res)))
(push match-word res))))
(list res after before)))
(defun helm-dabbrev--search (pattern beg sep-regexp)
"Search word or symbol at point matching PATTERN.
Argument BEG is corresponding to the previous `match-beginning'
search.
The search starts at (1- BEG) with a regexp starting with
`helm-dabbrev-separator-regexp' followed by PATTERN followed by a
regexp matching syntactically any word or symbol.
The possible false positives matching SEP-REGEXP at end are
finally removed."
(let ((eol (point-at-eol)))
(save-excursion
(goto-char (1- beg))
(when (re-search-forward
(concat "\\("
helm-dabbrev-separator-regexp
"\\)"
"\\(?99:\\("
(regexp-quote pattern)
"\\(\\sw\\|\\s_\\)+\\)\\)")
eol t)
(replace-regexp-in-string
sep-regexp ""
(match-string-no-properties 99))))))
(defun helm-dabbrev--get-candidates (dabbrev &optional limit)
(cl-assert dabbrev nil "[No Match]")
(helm-dabbrev--collect
dabbrev (or limit helm-dabbrev-candidates-number-limit)
(cl-case helm-dabbrev-case-fold-search
(smart (helm-set-case-fold-search-1 dabbrev))
(t helm-dabbrev-case-fold-search))
helm-dabbrev-always-search-all))
(defun helm-dabbrev-default-action (candidate)
(with-helm-current-buffer
(let* ((limits (helm-bounds-of-thing-before-point
helm-dabbrev-separator-regexp))
(beg (car limits))
(end (point)))
(run-with-timer
0.01 nil
'helm-insert-completion-at-point
beg end candidate))))
;;;###autoload
(cl-defun helm-dabbrev ()
"Preconfigured helm for dynamic abbreviations."
(interactive)
(unless helm-dabbrev--computing-cache
(let ((dabbrev (helm-thing-before-point
nil helm-dabbrev-separator-regexp))
(limits (helm-bounds-of-thing-before-point
helm-dabbrev-separator-regexp))
(enable-recursive-minibuffers t)
(cycling-disabled-p (or (null helm-dabbrev-cycle-threshold)
(zerop helm-dabbrev-cycle-threshold)))
(helm-execute-action-at-once-if-one t)
(helm-quit-if-no-candidate
(lambda ()
(message "[Helm-dabbrev: No expansion found]"))))
(cl-assert (and (stringp dabbrev) (not (string= dabbrev "")))
nil "[Helm-dabbrev: Nothing found before point]")
(when (and
;; have been called at least once.
(helm-dabbrev-info-p helm-dabbrev--data)
;; But user have moved with some other command
;; in the meaning time.
(not (eq last-command 'helm-dabbrev)))
(setq helm-dabbrev--data nil))
;; When candidates are requested in helm directly without cycling,
;; we need them right now before running helm.
(when cycling-disabled-p
(message "Waiting for helm-dabbrev candidates...")
(setq helm-dabbrev--cache (helm-dabbrev--get-candidates dabbrev)))
(unless (or cycling-disabled-p
(helm-dabbrev-info-p helm-dabbrev--data))
(setq helm-dabbrev--data
(make-helm-dabbrev-info
:dabbrev dabbrev
:limits limits
:iterator
(helm-iter-list
(cl-loop for i in (helm-dabbrev--get-candidates
dabbrev helm-dabbrev-cycle-threshold)
when (string-match-p
(concat "^" (regexp-quote dabbrev)) i)
collect i)))))
(let ((iter (and (helm-dabbrev-info-p helm-dabbrev--data)
(helm-dabbrev-info-iterator helm-dabbrev--data)))
deactivate-mark)
;; Cycle until iterator is consumed.
(helm-aif (and iter (helm-iter-next iter))
(progn
(helm-insert-completion-at-point
(car (helm-dabbrev-info-limits helm-dabbrev--data))
;; END is the end of the previous inserted string, not
;; the end (apart for first insertion) of the initial string.
(cdr limits) it)
;; Move already tried candidates to end of list.
(push it helm-dabbrev--already-tried))
;; Iterator is now empty, or cycling was disabled, maybe
;; reset dabbrev to initial value and start helm completion.
(let* ((old-dabbrev (if (helm-dabbrev-info-p helm-dabbrev--data)
(helm-dabbrev-info-dabbrev helm-dabbrev--data)
dabbrev))
(only-one (eq (length helm-dabbrev--already-tried) 1)))
(unless helm-dabbrev--cache ; Already computed when
; cycling is disabled.
(message "Waiting for helm-dabbrev candidates...")
(setq helm-dabbrev--computing-cache t)
(setq helm-dabbrev--cache
(helm-dabbrev--get-candidates old-dabbrev))
;; If user continues typing M-/ while display is blocked by
;; helm-dabbrev--get-candidates delete these events.
(setq unread-command-events nil))
;; If the length of candidates is only one when computed
;; that's mean the unique matched item have already been
;; inserted by the iterator, so no need to reinsert the old dabbrev,
;; just let helm exiting with "No expansion found".
(unless (or only-one cycling-disabled-p)
(setq dabbrev old-dabbrev
limits (helm-dabbrev-info-limits helm-dabbrev--data))
(setq helm-dabbrev--data nil)
(delete-region (car limits) (point))
(insert dabbrev))
(when (and (null cycling-disabled-p) only-one)
(setq helm-dabbrev--cache nil
helm-dabbrev--already-tried nil
helm-dabbrev--computing-cache nil)
(cl-return-from helm-dabbrev
(message "[Helm-dabbrev: No expansion found]")))
(with-helm-show-completion (car limits) (cdr limits)
(unwind-protect
(helm :sources
(helm-build-in-buffer-source "Dabbrev Expand"
:data
(append
(cl-loop with lst = helm-dabbrev--cache
for cand in helm-dabbrev--already-tried
do (setq lst (delete cand lst))
finally return lst)
helm-dabbrev--already-tried)
:persistent-action 'ignore
:persistent-help "DoNothing"
:keymap helm-dabbrev-map
:action 'helm-dabbrev-default-action
:group 'helm-dabbrev)
:buffer "*helm dabbrev*"
:input (concat "^" dabbrev " ")
:resume 'noresume
:allow-nest t)
(setq helm-dabbrev--computing-cache nil
helm-dabbrev--already-tried nil
helm-dabbrev--cache nil)))))))))
(provide 'helm-dabbrev)
;; Local Variables:
;; byte-compile-warnings: (not obsolete)
;; coding: utf-8
;; indent-tabs-mode: nil
;; End:
;;; helm-dabbrev.el ends here