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1 | ;; Expand a word trying various ways to find its expansion. |
2 | ;; Copyright (C) 1992 Free Software Foundation, Inc. | |
3 | ;; | |
4 | ;; This file is part of GNU Emacs. | |
5 | ||
6 | ;; GNU Emacs is free software; you can redistribute it and/or modify | |
7 | ;; it under the terms of the GNU General Public License as published by | |
8 | ;; the Free Software Foundation; either version 2, or (at your option) | |
9 | ;; any later version. | |
10 | ||
11 | ;; GNU Emacs is distributed in the hope that it will be useful, | |
12 | ;; but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | ;; GNU General Public License for more details. | |
15 | ||
16 | ;; You should have received a copy of the GNU General Public License | |
17 | ;; along with GNU Emacs; see the file COPYING. If not, write to | |
18 | ;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. | |
19 | ;; | |
20 | ;; Author: Anders Holst (aho@sans.kth.se) | |
21 | ;; | |
22 | ;; Last change: 4 January 1993 | |
23 | ||
24 | ;; | |
25 | ;; DESCRIPTION | |
26 | ;; | |
27 | ;; `hippie-expand' is a single function for a lot of different kinds | |
28 | ;; of completions and expansions. Called repeatedly it tries all | |
29 | ;; possible completions in succession. | |
30 | ;; Which kinds of completions to try, and in which order, is | |
31 | ;; determined by the contents of `hippie-expand-try-functions-list'. | |
32 | ;; Much customization of `hippie-expand' can be made by changing the | |
33 | ;; order of, removing, or inserting new functions in this list. | |
34 | ;; Given a positive numeric argument, `hippie-expand' jumps directly | |
35 | ;; ARG functions forward in this list. Given some other argument | |
36 | ;; (a negative argument or just Ctrl-U) it undoes the tried | |
37 | ;; completion. | |
38 | ;; If the variable `hippie-expand-verbose' is non-nil, `hippie-expand' | |
39 | ;; outputs in a message which try-function in the list that is used | |
40 | ;; currently (ie. was used currently and will be tried first the next | |
41 | ;; time). | |
42 | ;; See also the macro `make-hippie-expand-function' below. | |
43 | ;; | |
44 | ;; A short description of the current try-functions in this file: | |
45 | ;; `try-complete-file-name' : very convenient to have in any buffer, | |
46 | ;; and not just in the minibuffer or (some) shell-mode. It goes | |
47 | ;; through all possible completions instead of just completing as | |
48 | ;; much as is unique. | |
49 | ;; `try-complete-file-name-partially' : To insert in the list just | |
50 | ;; before `try-complete-file-name' for those who want first to get | |
51 | ;; a file name completed only as many characters as is unique. | |
52 | ;; (NOTE: Not by default in `hippie-expand-try-functions-list'.) | |
53 | ;; `try-expand-all-abbrevs' : can be removed if you don't use abbrevs. | |
54 | ;; Otherwise it looks through all abbrev-tables, starting with | |
55 | ;; the local followed by the global. | |
56 | ;; `try-expand-line' : Searches the buffer for an entire line that | |
57 | ;; begins exactly as the current line. Convenient sometimes, for | |
58 | ;; example as a substitute for (or complement to) the history | |
59 | ;; list in shell-like buffers. Remove it if you find it confusing. | |
60 | ;; `try-expand-line-all-buffers' : Like `try-expand-line' but searches | |
61 | ;; in all buffers (except the current). (This may be a little | |
62 | ;; slow, don't use it unless you are really fond of `hippie-expand'. | |
63 | ;; NOTE: Not by default in hippie-expand-try-functions-list.) | |
64 | ;; `try-expand-dabbrev' : works exactly as dabbrev-expand (but of | |
65 | ;; course in a way compatible with the other try-functions). | |
66 | ;; `try-expand-dabbrev-all-buffers' : perhaps the most useful of them, | |
67 | ;; like `dabbrev-expand' but searches all Emacs buffers (except the | |
68 | ;; current) for matching words. (No, I don't find this one | |
69 | ;; particularly slow.) | |
70 | ;; `try-complete-lisp-symbol' : like `lisp-complete-symbol', but goes | |
71 | ;; through all possibilities instead of completing what is unique. | |
72 | ;; Might be tedious (usually a lot of possible completions) and | |
73 | ;; since its function is much like `lisp-complete-symbol', which | |
74 | ;; already has a key of its own, you might want to remove this. | |
75 | ;; `try-complete-lisp-symbol-partially' : To insert in the list just | |
76 | ;; before `try-complete-lisp-symbol' for those who first want to get | |
77 | ;; completion of what is unique in the name. (NOTE: Not by | |
78 | ;; default in hippie-expand-try-functions-list.) | |
79 | ;; | |
80 | ;; To write new try-functions, consider the following: | |
81 | ;; Each try-function takes one argument OLD which is nil the first | |
82 | ;; time the function is called and true in succeeding calls for the | |
83 | ;; same string to complete. The first time the function has to | |
84 | ;; extract the string before point to complete, and substitute the | |
85 | ;; first completion alternative for it. On following calls it has to | |
86 | ;; substitute the next possible completion for the last tried string. | |
87 | ;; The try-function is to return t as long as it finds new | |
88 | ;; possible completions. When there are no more alternatives it has | |
89 | ;; to restore the text before point to its original contents, and | |
90 | ;; return nil (don't beep or message or anything). | |
91 | ;; The try-function can (should) use the following functions: | |
92 | ;; `he-init-string' : Initializes the text to substitute to the | |
93 | ;; contents of the region BEGIN to END. Also sets the variable | |
94 | ;; `he-search-string' to the text to expand. | |
95 | ;; `he-substitute-string' : substitutes STR into the region | |
96 | ;; initialized with `he-init-string'. (An optional second argument | |
97 | ;; TRANS-CASE non-nil, means transfer of case from the abbreviation | |
98 | ;; to the expansion is ok if that is enabled in the buffer.) | |
99 | ;; `he-reset-string' : Resets the initialized region to its original | |
100 | ;; contents. | |
101 | ;; There is also a variable: `he-tried-table' which is meant to contain | |
102 | ;; all tried expansions so far. The try-function can check this | |
103 | ;; variable to see whether an expansion has already been tried | |
104 | ;; (hint: `he-string-member'), and add its own tried expansions to it. | |
105 | ;; | |
106 | ;; | |
107 | ;; KNOWN BUGS | |
108 | ;; | |
109 | ;; It may happen that some completion suggestion occurs twice, in | |
110 | ;; spite of the use of `he-tried-table' to prevent that. This is | |
111 | ;; because different try-functions may try to complete different | |
112 | ;; lengths of text, and thus put different amounts of the | |
113 | ;; text in `he-try-table'. Anyway this seems to occur seldom enough not | |
114 | ;; to be too disturbing. Also it should NOT bee possible for the | |
115 | ;; opposite situation to occur, that `hippie-expand' misses some | |
116 | ;; suggestion because it thinks it has already tried it. | |
117 | ;; | |
118 | ;; | |
119 | ;; ACKNOWLEDGEMENT | |
120 | ;; | |
121 | ;; I want to thank Mikael Djurfeldt in discussions with whom the idea | |
122 | ;; of this function took form. | |
123 | ;; I am also grateful to all those who have given me suggestions on | |
124 | ;; how to improve it. | |
125 | ;; | |
126 | ||
127 | ||
128 | (defvar he-num -1) | |
129 | ||
130 | (defvar he-string-beg ()) | |
131 | ||
132 | (defvar he-string-end ()) | |
133 | ||
134 | (defvar he-search-string ()) | |
135 | ||
136 | (defvar he-expand-list ()) | |
137 | ||
138 | (defvar he-tried-table ()) | |
139 | ||
140 | (defvar he-search-loc ()) | |
141 | ||
142 | (defvar he-search-bw ()) | |
143 | ||
144 | (defvar he-search-bufs ()) | |
145 | ||
146 | (defvar hippie-expand-try-functions-list '(try-complete-file-name | |
147 | try-expand-all-abbrevs | |
148 | try-expand-line | |
149 | try-expand-dabbrev | |
150 | try-expand-dabbrev-all-buffers | |
151 | try-complete-lisp-symbol) | |
152 | "The list of expansion functions tried in order by `hippie-expand'. | |
153 | To change the behavior of `hippie-expand', remove, change the order of, | |
154 | or insert functions in this list.") | |
155 | ||
156 | (defvar hippie-expand-verbose t | |
157 | "*Non-nil makes `hippie-expand' output which function it is trying.") | |
158 | ||
159 | (defun hippie-expand (arg) | |
160 | "Try to expand text before point, using multiple methods. | |
161 | The expansion functions in `hippie-expand-try-functions-list' are | |
162 | tried in order, until a possible expansion is found. Repeated | |
163 | application of `hippie-expand' inserts successively possible | |
164 | expansions. | |
165 | With a positive numeric argument, jumps directly to the ARG next | |
166 | function in this list. With a negative argument or just \\[universal-argument], | |
167 | undoes the expansion." | |
168 | (interactive "P") | |
169 | (if (or (not arg) | |
170 | (and (integerp arg) (> arg 0))) | |
171 | (let ((first (or (= he-num -1) | |
172 | (not (equal this-command last-command))))) | |
173 | (if first | |
174 | (progn | |
175 | (setq he-num -1) | |
176 | (setq he-tried-table nil))) | |
177 | (if arg | |
178 | (if (not first) (he-reset-string)) | |
179 | (setq arg 0)) | |
180 | (let ((i (max (+ he-num arg) 0))) | |
181 | (while (not (or (>= i (length hippie-expand-try-functions-list)) | |
182 | (apply (nth i hippie-expand-try-functions-list) | |
183 | (list (= he-num i))))) | |
184 | (setq i (1+ i))) | |
185 | (setq he-num i)) | |
186 | (if (>= he-num (length hippie-expand-try-functions-list)) | |
187 | (progn | |
188 | (setq he-num -1) | |
189 | (if first | |
190 | (message "No expansion found") | |
191 | (message "No further expansions found")) | |
192 | (ding)) | |
193 | (if hippie-expand-verbose | |
194 | (message (concat "Using " | |
195 | (prin1-to-string (nth he-num | |
196 | hippie-expand-try-functions-list))))))) | |
197 | (if (>= he-num 0) | |
198 | (progn | |
199 | (setq he-num -1) | |
200 | (he-reset-string) | |
201 | (if hippie-expand-verbose | |
202 | (message "Undoing expansions")))))) | |
203 | ||
204 | ;; Initializes the region to expand (to between BEG and END). | |
205 | (defun he-init-string (beg end) | |
206 | (setq he-string-beg beg) | |
207 | (setq he-string-end end) | |
208 | (setq he-search-string (buffer-substring beg end))) | |
209 | ||
210 | ;; Resets the expanded region to its original contents. | |
211 | (defun he-reset-string () | |
212 | (delete-region he-string-beg he-string-end) | |
213 | (insert he-search-string) | |
214 | (setq he-string-end (point))) | |
215 | ||
216 | ;; Substitutes an expansion STR into the correct region (the region | |
217 | ;; initialized with `he-init-string'). | |
218 | ;; An optional argument TRANS-CASE means that it is ok to transfer case | |
219 | ;; from the abbreviation to the expansion if that is possible, and is | |
220 | ;; enabled in the buffer. | |
221 | (defun he-substitute-string (str &optional trans-case) | |
222 | (let ((trans-case (and trans-case | |
223 | case-replace | |
224 | case-fold-search | |
225 | (he-transfer-case-ok str he-search-string)))) | |
226 | (he-reset-string) | |
227 | (goto-char he-string-beg) | |
228 | (search-forward he-search-string) | |
229 | (replace-match (if trans-case (downcase str) str) | |
230 | (not trans-case) | |
231 | 'literal) | |
232 | (setq he-string-end (point)))) | |
233 | ||
234 | (defun he-ordinary-case-p (str) | |
235 | (or (string= str (downcase str)) | |
236 | (string= str (upcase str)) | |
237 | (string= str (capitalize str)))) | |
238 | ||
239 | (defun he-transfer-case-ok (to-str from-str) | |
240 | (and (not (string= from-str (substring to-str 0 (length from-str)))) | |
241 | ;; otherwise transfer is not needed (and this also solves | |
242 | ;; some obscure situations) | |
243 | (he-ordinary-case-p to-str) | |
244 | ;; otherwise case may be significant | |
245 | (he-ordinary-case-p from-str) | |
246 | ;; otherwise replace-match wont know what to do | |
247 | )) | |
248 | ||
249 | ;; Check if STR is a member of LST. | |
250 | ;; Ignore case if `case-replace' and `case-fold-search' are both t. | |
251 | (defun he-string-member (str lst) | |
252 | (while (and lst | |
253 | (not | |
254 | (if (and case-fold-search case-replace) | |
255 | (string= (downcase (car lst)) (downcase str)) | |
256 | (string= (car lst) str)))) | |
257 | (setq lst (cdr lst))) | |
258 | lst) | |
259 | ||
260 | ;; For the real hippie-expand enthusiast: A macro that makes it | |
261 | ;; possible to use many functions like hippie-expand, but with | |
262 | ;; different try-functions-lists. | |
263 | ;; Usage is for example: | |
264 | ;; (fset 'my-complete-file (make-hippie-expand-function | |
265 | ;; '(try-complete-file-name-partially | |
266 | ;; try-complete-file-name))) | |
267 | ;; (fset 'my-complete-line (make-hippie-expand-function | |
268 | ;; '(try-expand-line | |
269 | ;; try-expand-line-all-buffers))) | |
270 | ;; | |
271 | (defmacro make-hippie-expand-function (try-list &optional verbose) | |
272 | "Construct a function similar to `hippie-expand'. | |
273 | Make it use the expansion functions in TRY-LIST. An optional second | |
274 | argument VERBOSE non-nil makes the function verbose." | |
275 | (` '(lambda (arg) | |
276 | (, (concat | |
277 | "Try to expand text before point, using the following functions: \n" | |
278 | (mapconcat 'prin1-to-string (eval try-list) ", "))) | |
279 | (interactive "P") | |
280 | (let ((hippie-expand-try-functions-list (, try-list)) | |
281 | (hippie-expand-verbose (, verbose))) | |
282 | (hippie-expand arg))))) | |
283 | ||
284 | ||
285 | ;;; Here follows the try-functions and their requisites: | |
286 | ||
287 | (defun try-complete-file-name (old) | |
288 | "Try to complete text as a file name. | |
289 | The argument OLD has to be nil the first call of this function, and t | |
290 | for subsequent calls (for further possible completions of the same | |
291 | string). It returns t if a new completion is found, nil otherwise." | |
292 | (if (not old) | |
293 | (progn | |
294 | (he-init-string (he-file-name-beg) (point)) | |
295 | (let ((name-part (file-name-nondirectory he-search-string)) | |
296 | (dir-part (expand-file-name (or (file-name-directory | |
297 | he-search-string) "")))) | |
298 | (if (not (he-string-member name-part he-tried-table)) | |
299 | (setq he-tried-table (cons name-part he-tried-table))) | |
300 | (if (and (not (equal he-search-string "")) | |
301 | (file-directory-p dir-part)) | |
302 | (setq he-expand-list (sort (file-name-all-completions | |
303 | name-part | |
304 | dir-part) | |
305 | 'string-lessp)) | |
306 | (setq he-expand-list ()))))) | |
307 | ||
308 | (while (and he-expand-list | |
309 | (he-string-member (car he-expand-list) he-tried-table)) | |
310 | (setq he-expand-list (cdr he-expand-list))) | |
311 | (if (null he-expand-list) | |
312 | (progn | |
313 | (he-reset-string) | |
314 | ()) | |
315 | (let ((filename (concat (file-name-directory he-search-string) | |
316 | (car he-expand-list)))) | |
317 | (he-substitute-string filename) | |
318 | (setq he-tried-table (cons (car he-expand-list) he-tried-table)) | |
319 | (setq he-expand-list (cdr he-expand-list)) | |
320 | t))) | |
321 | ||
322 | (defun try-complete-file-name-partially (old) | |
323 | "Try to complete text as a file name, as many characters as unique. | |
324 | The argument OLD has to be nil the first call of this function. It | |
325 | returns t if a unique, possibly partial, completion is found, nil | |
326 | otherwise." | |
327 | (let ((expansion ())) | |
328 | (if (not old) | |
329 | (progn | |
330 | (he-init-string (he-file-name-beg) (point)) | |
331 | (let ((name-part (file-name-nondirectory he-search-string)) | |
332 | (dir-part (expand-file-name (or (file-name-directory | |
333 | he-search-string) "")))) | |
334 | (if (and (not (equal he-search-string "")) | |
335 | (file-directory-p dir-part)) | |
336 | (setq expansion (file-name-completion name-part | |
337 | dir-part))) | |
338 | (if (or (eq expansion t) | |
339 | (string= expansion name-part)) | |
340 | (setq expansion ()))))) | |
341 | ||
342 | (if (not expansion) | |
343 | (progn | |
344 | (he-reset-string) | |
345 | ()) | |
346 | (let ((filename (concat (file-name-directory he-search-string) | |
347 | expansion))) | |
348 | (he-substitute-string filename) | |
349 | (setq he-tried-table (cons expansion he-tried-table)) | |
350 | t)))) | |
351 | ||
352 | (defun he-file-name-beg () | |
353 | (let ((skips "-a-zA-Z0-9_./~^#$")) | |
354 | (save-excursion | |
355 | (skip-chars-backward skips) | |
356 | (point)))) | |
357 | ||
358 | (defun try-complete-lisp-symbol (old) | |
359 | "Try to complete word as an Emacs Lisp symbol. | |
360 | The argument OLD has to be nil the first call of this function, and t | |
361 | for subsequent calls (for further possible completions of the same | |
362 | string). It returns t if a new completion is found, nil otherwise." | |
363 | (if (not old) | |
364 | (progn | |
365 | (he-init-string (he-lisp-symbol-beg) (point)) | |
366 | (if (not (he-string-member he-search-string he-tried-table)) | |
367 | (setq he-tried-table (cons he-search-string he-tried-table))) | |
368 | (setq he-expand-list | |
369 | (and (not (equal he-search-string "")) | |
370 | (sort (all-completions he-search-string obarray | |
371 | (function (lambda (sym) | |
372 | (or (boundp sym) | |
373 | (fboundp sym) | |
374 | (symbol-plist sym))))) | |
375 | 'string-lessp))))) | |
376 | (while (and he-expand-list | |
377 | (he-string-member (car he-expand-list) he-tried-table)) | |
378 | (setq he-expand-list (cdr he-expand-list))) | |
379 | (if (null he-expand-list) | |
380 | (progn | |
381 | (he-reset-string) | |
382 | ()) | |
383 | (progn | |
384 | (he-substitute-string (car he-expand-list)) | |
385 | (setq he-tried-table (cons (car he-expand-list) he-tried-table)) | |
386 | (setq he-expand-list (cdr he-expand-list)) | |
387 | t))) | |
388 | ||
389 | (defun try-complete-lisp-symbol-partially (old) | |
390 | "Try to complete as an Emacs Lisp symbol, as many characters as unique. | |
391 | The argument OLD has to be nil the first call of this function. It | |
392 | returns t if a unique, possibly partial, completion is found, nil | |
393 | otherwise." | |
394 | (let ((expansion ())) | |
395 | (if (not old) | |
396 | (progn | |
397 | (he-init-string (he-lisp-symbol-beg) (point)) | |
398 | (if (not (string= he-search-string "")) | |
399 | (setq expansion | |
400 | (try-completion he-search-string obarray | |
401 | (function (lambda (sym) | |
402 | (or (boundp sym) | |
403 | (fboundp sym) | |
404 | (symbol-plist sym))))))) | |
405 | (if (or (eq expansion t) | |
406 | (string= expansion he-search-string)) | |
407 | (setq expansion ())))) | |
408 | ||
409 | (if (not expansion) | |
410 | (progn | |
411 | (he-reset-string) | |
412 | ()) | |
413 | (progn | |
414 | (he-substitute-string expansion) | |
415 | (setq he-tried-table (cons expansion he-tried-table)) | |
416 | t)))) | |
417 | ||
418 | (defun he-lisp-symbol-beg () | |
419 | (let ((skips "-a-zA-Z0-9_.")) | |
420 | (save-excursion | |
421 | (skip-chars-backward skips) | |
422 | (point)))) | |
423 | ||
424 | (defun try-expand-line (old) | |
425 | "Try to complete the current line to an entire line in the buffer. | |
426 | The argument OLD has to be nil the first call of this function, and t | |
427 | for subsequent calls (for further possible completions of the same | |
428 | string). It returns t if a new completion is found, nil otherwise." | |
429 | (let ((expansion ()) | |
430 | (strip-prompt (and (get-buffer-process (current-buffer)) | |
431 | shell-prompt-pattern))) | |
432 | (if (not old) | |
433 | (progn | |
434 | (he-init-string (he-line-beg strip-prompt) (point)) | |
435 | (setq he-search-loc he-string-beg) | |
436 | (setq he-search-bw t))) | |
437 | ||
438 | (if (not (equal he-search-string "")) | |
439 | (save-excursion | |
440 | ;; Try looking backward unless inhibited. | |
441 | (if he-search-bw | |
442 | (progn | |
443 | (goto-char he-search-loc) | |
444 | (setq expansion (he-line-search he-search-string | |
445 | strip-prompt t)) | |
446 | (setq he-search-loc (point-marker)) | |
447 | (if (not expansion) | |
448 | (progn | |
449 | (setq he-search-loc he-string-end) | |
450 | (setq he-search-bw ()))))) | |
451 | ||
452 | (if (not expansion) ; Then look forward. | |
453 | (progn | |
454 | (goto-char he-search-loc) | |
455 | (setq expansion (he-line-search he-search-string | |
456 | strip-prompt nil)) | |
457 | (setq he-search-loc (point-marker)))))) | |
458 | ||
459 | (if (not expansion) | |
460 | (progn | |
461 | (he-reset-string) | |
462 | ()) | |
463 | (progn | |
464 | (he-substitute-string expansion t) | |
465 | (setq he-tried-table (cons expansion he-tried-table)) | |
466 | t)))) | |
467 | ||
468 | (defun try-expand-line-all-buffers (old) | |
469 | "Try to complete the current line, searching all other buffers. | |
470 | The argument OLD has to be nil the first call of this function, and t | |
471 | for subsequent calls (for further possible completions of the same | |
472 | string). It returns t if a new completion is found, nil otherwise." | |
473 | (let ((expansion ()) | |
474 | (strip-prompt (and (get-buffer-process (current-buffer)) | |
475 | shell-prompt-pattern)) | |
476 | (buf (current-buffer))) | |
477 | (if (not old) | |
478 | (progn | |
479 | (he-init-string (he-line-beg strip-prompt) (point)) | |
480 | (setq he-search-loc 0) | |
481 | (setq he-search-bufs (buffer-list)))) | |
482 | ||
483 | (if (not (equal he-search-string "")) | |
484 | (while (and he-search-bufs (not expansion)) | |
485 | (set-buffer (car he-search-bufs)) | |
486 | (if (and (not (eq (current-buffer) buf)) | |
487 | (not (eq major-mode 'dired-mode))) | |
488 | ;; dont search dired buffers | |
489 | (save-excursion | |
490 | (goto-char he-search-loc) | |
491 | (setq expansion (he-line-search he-search-string | |
492 | strip-prompt nil)) | |
493 | (setq he-search-loc (point-marker)))) | |
494 | (if expansion | |
495 | (setq he-tried-table (cons expansion he-tried-table)) | |
496 | (progn | |
497 | (setq he-search-loc 0) | |
498 | (setq he-search-bufs (cdr he-search-bufs)))))) | |
499 | ||
500 | (set-buffer buf) | |
501 | (if (not expansion) | |
502 | (progn | |
503 | (he-reset-string) | |
504 | ()) | |
505 | (progn | |
506 | (he-substitute-string expansion t) | |
507 | t)))) | |
508 | ||
509 | (defun he-line-search (str strip-prompt reverse) | |
510 | (let ((result ())) | |
511 | (while (and (not result) | |
512 | (if reverse | |
513 | (re-search-backward | |
514 | (he-line-search-regexp str strip-prompt) | |
515 | nil t) | |
516 | (re-search-forward | |
517 | (he-line-search-regexp str strip-prompt) | |
518 | nil t))) | |
519 | (setq result (buffer-substring (match-beginning 2) (match-end 2))) | |
520 | (if (he-string-member result he-tried-table) | |
521 | (setq result nil))) ; if already in table, ignore | |
522 | result)) | |
523 | ||
524 | (defun he-line-beg (strip-prompt) | |
525 | (save-excursion | |
526 | (end-of-line) | |
527 | (if (re-search-backward (he-line-search-regexp "" strip-prompt) | |
528 | (save-excursion (beginning-of-line) | |
529 | (point)) t) | |
530 | (match-beginning 2) | |
531 | (beginning-of-line) | |
532 | (point)))) | |
533 | ||
534 | (defun he-line-search-regexp (pat strip-prompt) | |
535 | (if strip-prompt | |
536 | (concat "\\(" shell-prompt-pattern "\\|^\\s-*\\)\\(" | |
537 | (regexp-quote pat) | |
538 | "[^\n]*[^ \t\n]\\)") | |
539 | (concat "^\\(\\s-*\\)\\(" | |
540 | (regexp-quote pat) | |
541 | "[^\n]*[^ \t\n]\\)"))) | |
542 | ||
543 | (defun try-expand-all-abbrevs (old) | |
544 | "Try to expand word before point according to all abbrev tables. | |
545 | The argument OLD has to be nil the first call of this function, and t | |
546 | for subsequent calls (for further possible expansions of the same | |
547 | string). It returns t if a new expansion is found, nil otherwise." | |
548 | (if (not old) | |
549 | (progn | |
550 | (he-init-string (he-dabbrev-beg) (point)) | |
551 | (setq he-expand-list | |
552 | (and (not (equal he-search-string "")) | |
553 | (mapcar (function (lambda (sym) | |
554 | (abbrev-expansion he-search-string | |
555 | (eval sym)))) | |
556 | (append '(local-abbrev-table | |
557 | global-abbrev-table) | |
558 | abbrev-table-name-list)))))) | |
559 | (while (and he-expand-list | |
560 | (or (not (car he-expand-list)) | |
561 | (he-string-member (car he-expand-list) he-tried-table))) | |
562 | (setq he-expand-list (cdr he-expand-list))) | |
563 | (if (null he-expand-list) | |
564 | (progn | |
565 | (he-reset-string) | |
566 | ()) | |
567 | (progn | |
568 | (he-substitute-string (car he-expand-list)) | |
569 | (setq he-tried-table (cons (car he-expand-list) he-tried-table)) | |
570 | (setq he-expand-list (cdr he-expand-list)) | |
571 | t))) | |
572 | ||
573 | (defun try-expand-dabbrev (old) | |
574 | "Try to expand word \"dynamically\", searching the current buffer. | |
575 | The argument OLD has to be nil the first call of this function, and t | |
576 | for subsequent calls (for further possible expansions of the same | |
577 | string). It returns t if a new expansion is found, nil otherwise." | |
578 | (let ((expansion ())) | |
579 | (if (not old) | |
580 | (progn | |
581 | (he-init-string (he-dabbrev-beg) (point)) | |
582 | (setq he-search-loc he-string-beg) | |
583 | (setq he-search-bw t))) | |
584 | ||
585 | (if (not (equal he-search-string "")) | |
586 | (save-excursion | |
587 | ;; Try looking backward unless inhibited. | |
588 | (if he-search-bw | |
589 | (progn | |
590 | (goto-char he-search-loc) | |
591 | (setq expansion (he-dab-search he-search-string t)) | |
592 | (setq he-search-loc (point-marker)) | |
593 | (if (not expansion) | |
594 | (progn | |
595 | (setq he-search-loc he-string-end) | |
596 | (setq he-search-bw ()))))) | |
597 | ||
598 | (if (not expansion) ; Then look forward. | |
599 | (progn | |
600 | (goto-char he-search-loc) | |
601 | (setq expansion (he-dab-search he-search-string nil)) | |
602 | (setq he-search-loc (point-marker)))))) | |
603 | ||
604 | (if (not expansion) | |
605 | (progn | |
606 | (he-reset-string) | |
607 | ()) | |
608 | (progn | |
609 | (he-substitute-string expansion t) | |
610 | (setq he-tried-table (cons expansion he-tried-table)) | |
611 | t)))) | |
612 | ||
613 | (defun try-expand-dabbrev-all-buffers (old) | |
614 | "Tries to expand word \"dynamically\", searching all other buffers. | |
615 | The argument OLD has to be nil the first call of this function, and t | |
616 | for subsequent calls (for further possible expansions of the same | |
617 | string). It returns t if a new expansion is found, nil otherwise." | |
618 | (let ((expansion ()) | |
619 | (buf (current-buffer))) | |
620 | (if (not old) | |
621 | (progn | |
622 | (he-init-string (he-dabbrev-beg) (point)) | |
623 | (setq he-search-loc 0) | |
624 | (setq he-search-bufs (buffer-list)))) | |
625 | ||
626 | (if (not (equal he-search-string "")) | |
627 | (while (and he-search-bufs (not expansion)) | |
628 | (set-buffer (car he-search-bufs)) | |
629 | (if (and (not (eq (current-buffer) buf)) | |
630 | (not (eq major-mode 'dired-mode))) | |
631 | ;; dont search dired buffers | |
632 | (save-excursion | |
633 | (goto-char he-search-loc) | |
634 | (setq expansion (he-dab-search he-search-string nil)) | |
635 | (setq he-search-loc (point-marker)))) | |
636 | (if expansion | |
637 | (setq he-tried-table (cons expansion he-tried-table)) | |
638 | (progn | |
639 | (setq he-search-loc 0) | |
640 | (setq he-search-bufs (cdr he-search-bufs)))))) | |
641 | ||
642 | (set-buffer buf) | |
643 | (if (not expansion) | |
644 | (progn | |
645 | (he-reset-string) | |
646 | ()) | |
647 | (progn | |
648 | (he-substitute-string expansion t) | |
649 | t)))) | |
650 | ||
651 | (defun he-dab-search-regexp (pat) | |
652 | (concat "\\b" (regexp-quote pat) | |
653 | "\\(\\sw\\|\\s_\\)+")) | |
654 | ||
655 | (defun he-dab-search (pattern reverse) | |
656 | (let ((result ())) | |
657 | (while (and (not result) | |
658 | (if reverse | |
659 | (re-search-backward (he-dab-search-regexp pattern) | |
660 | nil t) | |
661 | (re-search-forward (he-dab-search-regexp pattern) | |
662 | nil t))) | |
663 | (setq result (buffer-substring (match-beginning 0) (match-end 0))) | |
664 | (if (he-string-member result he-tried-table) | |
665 | (setq result nil))) ; if already in table, ignore | |
666 | result)) | |
667 | ||
668 | (defun he-dabbrev-beg () | |
669 | (let ((skips "-a-zA-Z0-9_.")) | |
670 | (save-excursion | |
671 | (skip-chars-backward skips) | |
672 | (skip-chars-forward "-_.") | |
673 | (point)))) | |
674 |