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1c6d8c76 | 1 | ;;; pcomplete.el --- programmable completion -*- lexical-binding: t -*- |
affbf647 | 2 | |
ba318903 | 3 | ;; Copyright (C) 1999-2014 Free Software Foundation, Inc. |
affbf647 GM |
4 | |
5 | ;; Author: John Wiegley <johnw@gnu.org> | |
5751b8f9 | 6 | ;; Keywords: processes abbrev |
affbf647 GM |
7 | |
8 | ;; This file is part of GNU Emacs. | |
9 | ||
eb3fa2cf | 10 | ;; GNU Emacs is free software: you can redistribute it and/or modify |
affbf647 | 11 | ;; it under the terms of the GNU General Public License as published by |
eb3fa2cf GM |
12 | ;; the Free Software Foundation, either version 3 of the License, or |
13 | ;; (at your option) any later version. | |
affbf647 GM |
14 | |
15 | ;; GNU Emacs is distributed in the hope that it will be useful, | |
16 | ;; but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | ;; GNU General Public License for more details. | |
19 | ||
20 | ;; You should have received a copy of the GNU General Public License | |
eb3fa2cf | 21 | ;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. |
affbf647 GM |
22 | |
23 | ;;; Commentary: | |
24 | ||
25 | ;; This module provides a programmable completion facility using | |
26 | ;; "completion functions". Each completion function is responsible | |
27 | ;; for producing a list of possible completions relevant to the current | |
28 | ;; argument position. | |
29 | ;; | |
30 | ;; To use pcomplete with shell-mode, for example, you will need the | |
865fe16f | 31 | ;; following in your init file: |
affbf647 | 32 | ;; |
affbf647 GM |
33 | ;; (add-hook 'shell-mode-hook 'pcomplete-shell-setup) |
34 | ;; | |
35 | ;; Most of the code below simply provides support mechanisms for | |
36 | ;; writing completion functions. Completion functions themselves are | |
37 | ;; very easy to write. They have few requirements beyond those of | |
38 | ;; regular Lisp functions. | |
39 | ;; | |
40 | ;; Consider the following example, which will complete against | |
41 | ;; filenames for the first two arguments, and directories for all | |
42 | ;; remaining arguments: | |
43 | ;; | |
44 | ;; (defun pcomplete/my-command () | |
45 | ;; (pcomplete-here (pcomplete-entries)) | |
46 | ;; (pcomplete-here (pcomplete-entries)) | |
47 | ;; (while (pcomplete-here (pcomplete-dirs)))) | |
48 | ;; | |
49 | ;; Here are the requirements for completion functions: | |
50 | ;; | |
51 | ;; @ They must be called "pcomplete/MAJOR-MODE/NAME", or | |
52 | ;; "pcomplete/NAME". This is how they are looked up, using the NAME | |
53 | ;; specified in the command argument (the argument in first | |
54 | ;; position). | |
55 | ;; | |
56 | ;; @ They must be callable with no arguments. | |
57 | ;; | |
58 | ;; @ Their return value is ignored. If they actually return normally, | |
59 | ;; it means no completions were available. | |
60 | ;; | |
61 | ;; @ In order to provide completions, they must throw the tag | |
3b067af1 SM |
62 | ;; `pcomplete-completions'. The value must be a completion table |
63 | ;; (i.e. a table that can be passed to try-completion and friends) | |
64 | ;; for the final argument. | |
affbf647 GM |
65 | ;; |
66 | ;; @ To simplify completion function logic, the tag `pcompleted' may | |
67 | ;; be thrown with a value of nil in order to abort the function. It | |
68 | ;; means that there were no completions available. | |
69 | ;; | |
70 | ;; When a completion function is called, the variable `pcomplete-args' | |
71 | ;; is in scope, and contains all of the arguments specified on the | |
72 | ;; command line. The variable `pcomplete-last' is the index of the | |
73 | ;; last argument in that list. | |
74 | ;; | |
75 | ;; The variable `pcomplete-index' is used by the completion code to | |
76 | ;; know which argument the completion function is currently examining. | |
77 | ;; It always begins at 1, meaning the first argument after the command | |
78 | ;; name. | |
79 | ;; | |
80 | ;; To facilitate writing completion logic, a special macro, | |
81 | ;; `pcomplete-here', has been provided which does several things: | |
82 | ;; | |
83 | ;; 1. It will throw `pcompleted' (with a value of nil) whenever | |
84 | ;; `pcomplete-index' exceeds `pcomplete-last'. | |
85 | ;; | |
86 | ;; 2. It will increment `pcomplete-index' if the final argument has | |
87 | ;; not been reached yet. | |
88 | ;; | |
89 | ;; 3. It will evaluate the form passed to it, and throw the result | |
90 | ;; using the `pcomplete-completions' tag, if it is called when | |
91 | ;; `pcomplete-index' is pointing to the final argument. | |
92 | ;; | |
93 | ;; Sometimes a completion function will want to vary the possible | |
94 | ;; completions for an argument based on the previous one. To | |
95 | ;; facilitate tests like this, the function `pcomplete-test' and | |
96 | ;; `pcomplete-match' are provided. Called with one argument, they | |
97 | ;; test the value of the previous command argument. Otherwise, a | |
98 | ;; relative index may be given as an optional second argument, where 0 | |
99 | ;; refers to the current argument, 1 the previous, 2 the one before | |
100 | ;; that, etc. The symbols `first' and `last' specify absolute | |
101 | ;; offsets. | |
102 | ;; | |
103 | ;; Here is an example which will only complete against directories for | |
104 | ;; the second argument if the first argument is also a directory: | |
105 | ;; | |
106 | ;; (defun pcomplete/example () | |
107 | ;; (pcomplete-here (pcomplete-entries)) | |
108 | ;; (if (pcomplete-test 'file-directory-p) | |
109 | ;; (pcomplete-here (pcomplete-dirs)) | |
110 | ;; (pcomplete-here (pcomplete-entries)))) | |
111 | ;; | |
112 | ;; For generating completion lists based on directory contents, see | |
113 | ;; the functions `pcomplete-entries', `pcomplete-dirs', | |
114 | ;; `pcomplete-executables' and `pcomplete-all-entries'. | |
115 | ;; | |
116 | ;; Consult the documentation for `pcomplete-here' for information | |
117 | ;; about its other arguments. | |
118 | ||
119 | ;;; Code: | |
120 | ||
32c1fffd | 121 | (require 'comint) |
affbf647 GM |
122 | |
123 | (defgroup pcomplete nil | |
124 | "Programmable completion." | |
5751b8f9 | 125 | :version "21.1" |
affbf647 GM |
126 | :group 'processes) |
127 | ||
128 | ;;; User Variables: | |
129 | ||
130 | (defcustom pcomplete-file-ignore nil | |
9201cc28 | 131 | "A regexp of filenames to be disregarded during file completion." |
219227ea | 132 | :type '(choice regexp (const :tag "None" nil)) |
affbf647 GM |
133 | :group 'pcomplete) |
134 | ||
135 | (defcustom pcomplete-dir-ignore nil | |
9201cc28 | 136 | "A regexp of names to be disregarded during directory completion." |
219227ea | 137 | :type '(choice regexp (const :tag "None" nil)) |
affbf647 GM |
138 | :group 'pcomplete) |
139 | ||
c60ee5e7 | 140 | (defcustom pcomplete-ignore-case (memq system-type '(ms-dos windows-nt cygwin)) |
48feed59 SM |
141 | ;; FIXME: the doc mentions file-name completion, but the code |
142 | ;; seems to apply it to all completions. | |
9201cc28 | 143 | "If non-nil, ignore case when doing filename completion." |
affbf647 GM |
144 | :type 'boolean |
145 | :group 'pcomplete) | |
146 | ||
147 | (defcustom pcomplete-autolist nil | |
9201cc28 | 148 | "If non-nil, automatically list possibilities on partial completion. |
affbf647 GM |
149 | This mirrors the optional behavior of tcsh." |
150 | :type 'boolean | |
151 | :group 'pcomplete) | |
152 | ||
58cc447b | 153 | (defcustom pcomplete-suffix-list (list ?/ ?:) |
9201cc28 | 154 | "A list of characters which constitute a proper suffix." |
affbf647 GM |
155 | :type '(repeat character) |
156 | :group 'pcomplete) | |
1c6d8c76 | 157 | (make-obsolete-variable 'pcomplete-suffix-list nil "24.1") |
affbf647 GM |
158 | |
159 | (defcustom pcomplete-recexact nil | |
9201cc28 | 160 | "If non-nil, use shortest completion if characters cannot be added. |
affbf647 GM |
161 | This mirrors the optional behavior of tcsh. |
162 | ||
163 | A non-nil value is useful if `pcomplete-autolist' is non-nil too." | |
164 | :type 'boolean | |
165 | :group 'pcomplete) | |
166 | ||
b4ff4f1f | 167 | (define-obsolete-variable-alias |
2a1e2476 | 168 | 'pcomplete-arg-quote-list 'comint-file-name-quote-list "24.3") |
affbf647 GM |
169 | |
170 | (defcustom pcomplete-man-function 'man | |
9201cc28 | 171 | "A function to that will be called to display a manual page. |
affbf647 GM |
172 | It will be passed the name of the command to document." |
173 | :type 'function | |
174 | :group 'pcomplete) | |
175 | ||
176 | (defcustom pcomplete-compare-entry-function 'string-lessp | |
9201cc28 | 177 | "This function is used to order file entries for completion. |
affbf647 GM |
178 | The behavior of most all shells is to sort alphabetically." |
179 | :type '(radio (function-item string-lessp) | |
180 | (function-item file-newer-than-file-p) | |
181 | (function :tag "Other")) | |
182 | :group 'pcomplete) | |
183 | ||
184 | (defcustom pcomplete-help nil | |
9201cc28 | 185 | "A string or function (or nil) used for context-sensitive help. |
affbf647 GM |
186 | If a string, it should name an Info node that will be jumped to. |
187 | If non-nil, it must a sexp that will be evaluated, and whose | |
188 | result will be shown in the minibuffer. | |
189 | If nil, the function `pcomplete-man-function' will be called with the | |
190 | current command argument." | |
191 | :type '(choice string sexp (const :tag "Use man page" nil)) | |
192 | :group 'pcomplete) | |
193 | ||
194 | (defcustom pcomplete-expand-before-complete nil | |
9201cc28 | 195 | "If non-nil, expand the current argument before completing it. |
affbf647 GM |
196 | This means that typing something such as '$HOME/bi' followed by |
197 | \\[pcomplete-argument] will cause the variable reference to be | |
198 | resolved first, and the resultant value that will be completed against | |
199 | to be inserted in the buffer. Note that exactly what gets expanded | |
200 | and how is entirely up to the behavior of the | |
201 | `pcomplete-parse-arguments-function'." | |
202 | :type 'boolean | |
203 | :group 'pcomplete) | |
204 | ||
205 | (defcustom pcomplete-parse-arguments-function | |
206 | 'pcomplete-parse-buffer-arguments | |
9201cc28 | 207 | "A function to call to parse the current line's arguments. |
affbf647 GM |
208 | It should be called with no parameters, and with point at the position |
209 | of the argument that is to be completed. | |
210 | ||
211 | It must either return nil, or a cons cell of the form: | |
212 | ||
213 | ((ARG...) (BEG-POS...)) | |
214 | ||
215 | The two lists must be identical in length. The first gives the final | |
216 | value of each command line argument (which need not match the textual | |
217 | representation of that argument), and BEG-POS gives the beginning | |
218 | position of each argument, as it is seen by the user. The establishes | |
219 | a relationship between the fully resolved value of the argument, and | |
220 | the textual representation of the argument." | |
221 | :type 'function | |
222 | :group 'pcomplete) | |
223 | ||
224 | (defcustom pcomplete-cycle-completions t | |
9201cc28 | 225 | "If non-nil, hitting the TAB key cycles through the completion list. |
affbf647 GM |
226 | Typical Emacs behavior is to complete as much as possible, then pause |
227 | waiting for further input. Then if TAB is hit again, show a list of | |
228 | possible completions. When `pcomplete-cycle-completions' is non-nil, | |
229 | it acts more like zsh or 4nt, showing the first maximal match first, | |
230 | followed by any further matches on each subsequent pressing of the TAB | |
231 | key. \\[pcomplete-list] is the key to press if the user wants to see | |
232 | the list of possible completions." | |
233 | :type 'boolean | |
234 | :group 'pcomplete) | |
235 | ||
236 | (defcustom pcomplete-cycle-cutoff-length 5 | |
9201cc28 | 237 | "If the number of completions is greater than this, don't cycle. |
affbf647 GM |
238 | This variable is a compromise between the traditional Emacs style of |
239 | completion, and the \"cycling\" style. Basically, if there are more | |
240 | than this number of completions possible, don't automatically pick the | |
241 | first one and then expect the user to press TAB to cycle through them. | |
242 | Typically, when there are a large number of completion possibilities, | |
243 | the user wants to see them in a list buffer so that they can know what | |
244 | options are available. But if the list is small, it means the user | |
245 | has already entered enough input to disambiguate most of the | |
246 | possibilities, and therefore they are probably most interested in | |
247 | cycling through the candidates. Set this value to nil if you want | |
248 | cycling to always be enabled." | |
249 | :type '(choice integer (const :tag "Always cycle" nil)) | |
250 | :group 'pcomplete) | |
251 | ||
252 | (defcustom pcomplete-restore-window-delay 1 | |
9201cc28 | 253 | "The number of seconds to wait before restoring completion windows. |
affbf647 GM |
254 | Once the completion window has been displayed, if the user then goes |
255 | on to type something else, that completion window will be removed from | |
256 | the display (actually, the original window configuration before it was | |
257 | displayed will be restored), after this many seconds of idle time. If | |
258 | set to nil, completion windows will be left on second until the user | |
259 | removes them manually. If set to 0, they will disappear immediately | |
260 | after the user enters a key other than TAB." | |
261 | :type '(choice integer (const :tag "Never restore" nil)) | |
262 | :group 'pcomplete) | |
263 | ||
264 | (defcustom pcomplete-try-first-hook nil | |
9201cc28 | 265 | "A list of functions which are called before completing an argument. |
affbf647 GM |
266 | This can be used, for example, for completing things which might apply |
267 | to all arguments, such as variable names after a $." | |
268 | :type 'hook | |
269 | :group 'pcomplete) | |
270 | ||
004a00f4 DN |
271 | (defsubst pcomplete-executables (&optional regexp) |
272 | "Complete amongst a list of directories and executables." | |
273 | (pcomplete-entries regexp 'file-executable-p)) | |
274 | ||
affbf647 GM |
275 | (defcustom pcomplete-command-completion-function |
276 | (function | |
277 | (lambda () | |
278 | (pcomplete-here (pcomplete-executables)))) | |
9201cc28 | 279 | "Function called for completing the initial command argument." |
affbf647 GM |
280 | :type 'function |
281 | :group 'pcomplete) | |
282 | ||
283 | (defcustom pcomplete-command-name-function 'pcomplete-command-name | |
9201cc28 | 284 | "Function called for determining the current command name." |
affbf647 GM |
285 | :type 'function |
286 | :group 'pcomplete) | |
287 | ||
288 | (defcustom pcomplete-default-completion-function | |
289 | (function | |
290 | (lambda () | |
291 | (while (pcomplete-here (pcomplete-entries))))) | |
9201cc28 | 292 | "Function called when no completion rule can be found. |
affbf647 GM |
293 | This function is used to generate completions for every argument." |
294 | :type 'function | |
295 | :group 'pcomplete) | |
296 | ||
ca7aae91 | 297 | (defcustom pcomplete-use-paring t |
9201cc28 | 298 | "If t, pare alternatives that have already been used. |
ca7aae91 JW |
299 | If nil, you will always see the completion set of possible options, no |
300 | matter which of those options have already been used in previous | |
301 | command arguments." | |
302 | :type 'boolean | |
303 | :group 'pcomplete) | |
304 | ||
150158c4 | 305 | (defcustom pcomplete-termination-string " " |
9201cc28 | 306 | "A string that is inserted after any completion or expansion. |
150158c4 JW |
307 | This is usually a space character, useful when completing lists of |
308 | words separated by spaces. However, if your list uses a different | |
309 | separator character, or if the completion occurs in a word that is | |
310 | already terminated by a character, this variable should be locally | |
311 | modified to be an empty string, or the desired separation string." | |
312 | :type 'string | |
313 | :group 'pcomplete) | |
314 | ||
affbf647 GM |
315 | ;;; Internal Variables: |
316 | ||
317 | ;; for cycling completion support | |
318 | (defvar pcomplete-current-completions nil) | |
319 | (defvar pcomplete-last-completion-length) | |
320 | (defvar pcomplete-last-completion-stub) | |
321 | (defvar pcomplete-last-completion-raw) | |
322 | (defvar pcomplete-last-window-config nil) | |
323 | (defvar pcomplete-window-restore-timer nil) | |
324 | ||
325 | (make-variable-buffer-local 'pcomplete-current-completions) | |
326 | (make-variable-buffer-local 'pcomplete-last-completion-length) | |
327 | (make-variable-buffer-local 'pcomplete-last-completion-stub) | |
328 | (make-variable-buffer-local 'pcomplete-last-completion-raw) | |
329 | (make-variable-buffer-local 'pcomplete-last-window-config) | |
330 | (make-variable-buffer-local 'pcomplete-window-restore-timer) | |
331 | ||
332 | ;; used for altering pcomplete's behavior. These global variables | |
333 | ;; should always be nil. | |
334 | (defvar pcomplete-show-help nil) | |
335 | (defvar pcomplete-show-list nil) | |
336 | (defvar pcomplete-expand-only-p nil) | |
337 | ||
06b60517 JB |
338 | ;; for the sake of the bye-compiler, when compiling other files that |
339 | ;; contain completion functions | |
340 | (defvar pcomplete-args nil) | |
341 | (defvar pcomplete-begins nil) | |
342 | (defvar pcomplete-last nil) | |
343 | (defvar pcomplete-index nil) | |
344 | (defvar pcomplete-stub nil) | |
345 | (defvar pcomplete-seen nil) | |
346 | (defvar pcomplete-norm-func nil) | |
347 | ||
affbf647 GM |
348 | ;;; User Functions: |
349 | ||
2d085307 SM |
350 | ;;; Alternative front-end using the standard completion facilities. |
351 | ||
352 | ;; The way pcomplete-parse-arguments, pcomplete-stub, and | |
353 | ;; pcomplete-quote-argument work only works because of some deep | |
354 | ;; hypothesis about the way the completion work. Basically, it makes | |
355 | ;; it pretty much impossible to have completion other than | |
356 | ;; prefix-completion. | |
357 | ;; | |
b4ff4f1f SM |
358 | ;; pcomplete--common-suffix and completion-table-subvert try to work around |
359 | ;; this difficulty with heuristics, but it's really a hack. | |
360 | ||
361 | (defvar pcomplete-unquote-argument-function #'comint--unquote-argument) | |
362 | ||
363 | (defsubst pcomplete-unquote-argument (s) | |
364 | (funcall pcomplete-unquote-argument-function s)) | |
365 | ||
366 | (defvar pcomplete-requote-argument-function #'comint--requote-argument) | |
367 | ||
368 | (defun pcomplete--common-suffix (s1 s2) | |
369 | ;; Since S2 is expected to be the "unquoted/expanded" version of S1, | |
370 | ;; there shouldn't be any case difference, even if the completion is | |
371 | ;; case-insensitive. | |
372 | (let ((case-fold-search nil)) | |
373 | (string-match | |
374 | ;; \x3FFF7F is just an arbitrary char among the ones Emacs accepts | |
375 | ;; that hopefully will never appear in normal text. | |
376 | "\\(?:.\\|\n\\)*?\\(\\(?:.\\|\n\\)*\\)\x3FFF7F\\(?:.\\|\n\\)*\\1\\'" | |
377 | (concat s1 "\x3FFF7F" s2)) | |
378 | (- (match-end 1) (match-beginning 1)))) | |
379 | ||
c26ea4b2 | 380 | (defun pcomplete-completions-at-point () |
3b067af1 SM |
381 | "Provide standard completion using pcomplete's completion tables. |
382 | Same as `pcomplete' but using the standard completion UI." | |
0667de21 SM |
383 | ;; FIXME: it only completes the text before point, whereas the |
384 | ;; standard UI may also consider text after point. | |
c26ea4b2 SM |
385 | ;; FIXME: the `pcomplete' UI may be used internally during |
386 | ;; pcomplete-completions and then throw to `pcompleted', thus | |
387 | ;; imposing the pcomplete UI over the standard UI. | |
3b067af1 SM |
388 | (catch 'pcompleted |
389 | (let* ((pcomplete-stub) | |
390 | pcomplete-seen pcomplete-norm-func | |
391 | pcomplete-args pcomplete-last pcomplete-index | |
392 | (pcomplete-autolist pcomplete-autolist) | |
393 | (pcomplete-suffix-list pcomplete-suffix-list) | |
394 | ;; Apparently the vars above are global vars modified by | |
395 | ;; side-effects, whereas pcomplete-completions is the core | |
396 | ;; function that finds the chunk of text to complete | |
397 | ;; (returned indirectly in pcomplete-stub) and the set of | |
398 | ;; possible completions. | |
399 | (completions (pcomplete-completions)) | |
48feed59 SM |
400 | ;; Usually there's some close connection between pcomplete-stub |
401 | ;; and the text before point. But depending on what | |
402 | ;; pcomplete-parse-arguments-function does, that connection | |
403 | ;; might not be that close. E.g. in eshell, | |
404 | ;; pcomplete-parse-arguments-function expands envvars. | |
06b60517 | 405 | ;; |
48feed59 SM |
406 | ;; Since we use minibuffer-complete, which doesn't know |
407 | ;; pcomplete-stub and works from the buffer's text instead, | |
408 | ;; we need to trick minibuffer-complete, into using | |
409 | ;; pcomplete-stub without its knowledge. To that end, we | |
b4ff4f1f | 410 | ;; use completion-table-subvert to construct a completion |
48feed59 SM |
411 | ;; table which expects strings using a prefix from the |
412 | ;; buffer's text but internally uses the corresponding | |
413 | ;; prefix from pcomplete-stub. | |
414 | (beg (max (- (point) (length pcomplete-stub)) | |
2d085307 | 415 | (pcomplete-begin))) |
b4ff4f1f SM |
416 | (buftext (pcomplete-unquote-argument |
417 | (buffer-substring beg (point))))) | |
08abfaad SM |
418 | (when completions |
419 | (let ((table | |
b4ff4f1f SM |
420 | (completion-table-with-quoting |
421 | (if (equal pcomplete-stub buftext) | |
422 | completions | |
423 | ;; This may not always be strictly right, but given the lack | |
424 | ;; of any other info, it's about as good as it gets, and in | |
425 | ;; practice it should work just fine (fingers crossed). | |
426 | (let ((suf-len (pcomplete--common-suffix | |
08abfaad | 427 | pcomplete-stub buftext))) |
b4ff4f1f SM |
428 | (completion-table-subvert |
429 | completions | |
430 | (substring buftext 0 (- (length buftext) suf-len)) | |
431 | (substring pcomplete-stub 0 | |
432 | (- (length pcomplete-stub) suf-len))))) | |
433 | pcomplete-unquote-argument-function | |
434 | pcomplete-requote-argument-function)) | |
08abfaad SM |
435 | (pred |
436 | ;; Pare it down, if applicable. | |
437 | (when (and pcomplete-use-paring pcomplete-seen) | |
1c6d8c76 SM |
438 | ;; Capture the dynbound values for later use. |
439 | (let ((norm-func pcomplete-norm-func) | |
78054a46 SM |
440 | (seen |
441 | (mapcar (lambda (f) | |
442 | (funcall pcomplete-norm-func | |
443 | (directory-file-name f))) | |
444 | pcomplete-seen))) | |
1c6d8c76 SM |
445 | (lambda (f) |
446 | (not (member | |
447 | (funcall norm-func (directory-file-name f)) | |
448 | seen))))))) | |
08abfaad | 449 | (when pcomplete-ignore-case |
3dc61a09 | 450 | (setq table (completion-table-case-fold table))) |
a2a25d24 SM |
451 | (list beg (point) table |
452 | :predicate pred | |
453 | :exit-function | |
580bd868 CY |
454 | ;; If completion is finished, add a terminating space. |
455 | ;; We used to also do this if STATUS is `sole', but | |
456 | ;; that does not work right when completion cycling. | |
a2a25d24 | 457 | (unless (zerop (length pcomplete-termination-string)) |
580bd868 CY |
458 | (lambda (_s status) |
459 | (when (eq status 'finished) | |
a2a25d24 SM |
460 | (if (looking-at |
461 | (regexp-quote pcomplete-termination-string)) | |
462 | (goto-char (match-end 0)) | |
463 | (insert pcomplete-termination-string))))))))))) | |
c26ea4b2 SM |
464 | |
465 | ;; I don't think such commands are usable before first setting up buffer-local | |
466 | ;; variables to parse args, so there's no point autoloading it. | |
467 | ;; ;;;###autoload | |
468 | (defun pcomplete-std-complete () | |
20e0e05f | 469 | (let ((data (pcomplete-completions-at-point))) |
14a7fbd8 SM |
470 | (completion-in-region (nth 0 data) (nth 1 data) (nth 2 data) |
471 | (plist-get :predicate (nthcdr 3 data))))) | |
3b067af1 | 472 | |
2d085307 SM |
473 | ;;; Pcomplete's native UI. |
474 | ||
475 | ;;;###autoload | |
476 | (defun pcomplete (&optional interactively) | |
477 | "Support extensible programmable completion. | |
478 | To use this function, just bind the TAB key to it, or add it to your | |
479 | completion functions list (it should occur fairly early in the list)." | |
480 | (interactive "p") | |
481 | (if (and interactively | |
482 | pcomplete-cycle-completions | |
483 | pcomplete-current-completions | |
484 | (memq last-command '(pcomplete | |
485 | pcomplete-expand-and-complete | |
486 | pcomplete-reverse))) | |
487 | (progn | |
d355a0b7 | 488 | (delete-char (- pcomplete-last-completion-length)) |
2d085307 SM |
489 | (if (eq this-command 'pcomplete-reverse) |
490 | (progn | |
0667de21 SM |
491 | (push (car (last pcomplete-current-completions)) |
492 | pcomplete-current-completions) | |
2d085307 SM |
493 | (setcdr (last pcomplete-current-completions 2) nil)) |
494 | (nconc pcomplete-current-completions | |
495 | (list (car pcomplete-current-completions))) | |
496 | (setq pcomplete-current-completions | |
497 | (cdr pcomplete-current-completions))) | |
498 | (pcomplete-insert-entry pcomplete-last-completion-stub | |
499 | (car pcomplete-current-completions) | |
500 | nil pcomplete-last-completion-raw)) | |
501 | (setq pcomplete-current-completions nil | |
502 | pcomplete-last-completion-raw nil) | |
503 | (catch 'pcompleted | |
504 | (let* ((pcomplete-stub) | |
505 | pcomplete-seen pcomplete-norm-func | |
506 | pcomplete-args pcomplete-last pcomplete-index | |
507 | (pcomplete-autolist pcomplete-autolist) | |
508 | (pcomplete-suffix-list pcomplete-suffix-list) | |
509 | (completions (pcomplete-completions)) | |
510 | (result (pcomplete-do-complete pcomplete-stub completions))) | |
511 | (and result | |
512 | (not (eq (car result) 'listed)) | |
513 | (cdr result) | |
514 | (pcomplete-insert-entry pcomplete-stub (cdr result) | |
515 | (memq (car result) | |
516 | '(sole shortest)) | |
517 | pcomplete-last-completion-raw)))))) | |
518 | ||
affbf647 GM |
519 | ;;;###autoload |
520 | (defun pcomplete-reverse () | |
521 | "If cycling completion is in use, cycle backwards." | |
522 | (interactive) | |
523 | (call-interactively 'pcomplete)) | |
524 | ||
525 | ;;;###autoload | |
526 | (defun pcomplete-expand-and-complete () | |
527 | "Expand the textual value of the current argument. | |
528 | This will modify the current buffer." | |
529 | (interactive) | |
530 | (let ((pcomplete-expand-before-complete t)) | |
531 | (pcomplete))) | |
532 | ||
533 | ;;;###autoload | |
534 | (defun pcomplete-continue () | |
535 | "Complete without reference to any cycling completions." | |
536 | (interactive) | |
537 | (setq pcomplete-current-completions nil | |
538 | pcomplete-last-completion-raw nil) | |
539 | (call-interactively 'pcomplete)) | |
540 | ||
541 | ;;;###autoload | |
542 | (defun pcomplete-expand () | |
543 | "Expand the textual value of the current argument. | |
544 | This will modify the current buffer." | |
545 | (interactive) | |
546 | (let ((pcomplete-expand-before-complete t) | |
547 | (pcomplete-expand-only-p t)) | |
548 | (pcomplete) | |
549 | (when (and pcomplete-current-completions | |
3b067af1 | 550 | (> (length pcomplete-current-completions) 0)) ;?? |
d355a0b7 | 551 | (delete-char (- pcomplete-last-completion-length)) |
affbf647 GM |
552 | (while pcomplete-current-completions |
553 | (unless (pcomplete-insert-entry | |
554 | "" (car pcomplete-current-completions) t | |
3b067af1 | 555 | pcomplete-last-completion-raw) |
150158c4 | 556 | (insert-and-inherit pcomplete-termination-string)) |
affbf647 GM |
557 | (setq pcomplete-current-completions |
558 | (cdr pcomplete-current-completions)))))) | |
559 | ||
560 | ;;;###autoload | |
561 | (defun pcomplete-help () | |
562 | "Display any help information relative to the current argument." | |
563 | (interactive) | |
564 | (let ((pcomplete-show-help t)) | |
565 | (pcomplete))) | |
566 | ||
567 | ;;;###autoload | |
568 | (defun pcomplete-list () | |
569 | "Show the list of possible completions for the current argument." | |
570 | (interactive) | |
571 | (when (and pcomplete-cycle-completions | |
572 | pcomplete-current-completions | |
573 | (eq last-command 'pcomplete-argument)) | |
d355a0b7 | 574 | (delete-char (- pcomplete-last-completion-length)) |
affbf647 GM |
575 | (setq pcomplete-current-completions nil |
576 | pcomplete-last-completion-raw nil)) | |
577 | (let ((pcomplete-show-list t)) | |
578 | (pcomplete))) | |
579 | ||
580 | ;;; Internal Functions: | |
581 | ||
582 | ;; argument handling | |
affbf647 GM |
583 | (defun pcomplete-arg (&optional index offset) |
584 | "Return the textual content of the INDEXth argument. | |
585 | INDEX is based from the current processing position. If INDEX is | |
586 | positive, values returned are closer to the command argument; if | |
587 | negative, they are closer to the last argument. If the INDEX is | |
588 | outside of the argument list, nil is returned. The default value for | |
589 | INDEX is 0, meaning the current argument being examined. | |
590 | ||
591 | The special indices `first' and `last' may be used to access those | |
592 | parts of the list. | |
593 | ||
594 | The OFFSET argument is added to/taken away from the index that will be | |
595 | used. This is really only useful with `first' and `last', for | |
596 | accessing absolute argument positions." | |
597 | (setq index | |
598 | (if (eq index 'first) | |
599 | 0 | |
600 | (if (eq index 'last) | |
601 | pcomplete-last | |
602 | (- pcomplete-index (or index 0))))) | |
603 | (if offset | |
604 | (setq index (+ index offset))) | |
605 | (nth index pcomplete-args)) | |
606 | ||
607 | (defun pcomplete-begin (&optional index offset) | |
608 | "Return the beginning position of the INDEXth argument. | |
609 | See the documentation for `pcomplete-arg'." | |
610 | (setq index | |
611 | (if (eq index 'first) | |
612 | 0 | |
613 | (if (eq index 'last) | |
614 | pcomplete-last | |
615 | (- pcomplete-index (or index 0))))) | |
616 | (if offset | |
617 | (setq index (+ index offset))) | |
618 | (nth index pcomplete-begins)) | |
619 | ||
620 | (defsubst pcomplete-actual-arg (&optional index offset) | |
621 | "Return the actual text representation of the last argument. | |
21a2e05d | 622 | This is different from `pcomplete-arg', which returns the textual value |
affbf647 GM |
623 | that the last argument evaluated to. This function returns what the |
624 | user actually typed in." | |
625 | (buffer-substring (pcomplete-begin index offset) (point))) | |
626 | ||
627 | (defsubst pcomplete-next-arg () | |
628 | "Move the various pointers to the next argument." | |
629 | (setq pcomplete-index (1+ pcomplete-index) | |
630 | pcomplete-stub (pcomplete-arg)) | |
631 | (if (> pcomplete-index pcomplete-last) | |
632 | (progn | |
633 | (message "No completions") | |
634 | (throw 'pcompleted nil)))) | |
635 | ||
636 | (defun pcomplete-command-name () | |
637 | "Return the command name of the first argument." | |
638 | (file-name-nondirectory (pcomplete-arg 'first))) | |
639 | ||
640 | (defun pcomplete-match (regexp &optional index offset start) | |
641 | "Like `string-match', but on the current completion argument." | |
642 | (let ((arg (pcomplete-arg (or index 1) offset))) | |
643 | (if arg | |
644 | (string-match regexp arg start) | |
645 | (throw 'pcompleted nil)))) | |
646 | ||
647 | (defun pcomplete-match-string (which &optional index offset) | |
21a2e05d | 648 | "Like `match-string', but on the current completion argument." |
affbf647 GM |
649 | (let ((arg (pcomplete-arg (or index 1) offset))) |
650 | (if arg | |
651 | (match-string which arg) | |
652 | (throw 'pcompleted nil)))) | |
653 | ||
654 | (defalias 'pcomplete-match-beginning 'match-beginning) | |
655 | (defalias 'pcomplete-match-end 'match-end) | |
656 | ||
657 | (defsubst pcomplete--test (pred arg) | |
658 | "Perform a programmable completion predicate match." | |
659 | (and pred | |
660 | (cond ((eq pred t) t) | |
661 | ((functionp pred) | |
662 | (funcall pred arg)) | |
663 | ((stringp pred) | |
664 | (string-match (concat "^" pred "$") arg))) | |
665 | pred)) | |
666 | ||
667 | (defun pcomplete-test (predicates &optional index offset) | |
668 | "Predicates to test the current programmable argument with." | |
669 | (let ((arg (pcomplete-arg (or index 1) offset))) | |
670 | (unless (null predicates) | |
671 | (if (not (listp predicates)) | |
672 | (pcomplete--test predicates arg) | |
673 | (let ((pred predicates) | |
674 | found) | |
675 | (while (and pred (not found)) | |
676 | (setq found (pcomplete--test (car pred) arg) | |
677 | pred (cdr pred))) | |
678 | found))))) | |
679 | ||
680 | (defun pcomplete-parse-buffer-arguments () | |
681 | "Parse whitespace separated arguments in the current region." | |
682 | (let ((begin (point-min)) | |
683 | (end (point-max)) | |
684 | begins args) | |
685 | (save-excursion | |
686 | (goto-char begin) | |
687 | (while (< (point) end) | |
688 | (skip-chars-forward " \t\n") | |
0667de21 | 689 | (push (point) begins) |
affbf647 | 690 | (skip-chars-forward "^ \t\n") |
0667de21 SM |
691 | (push (buffer-substring-no-properties |
692 | (car begins) (point)) | |
693 | args)) | |
694 | (cons (nreverse args) (nreverse begins))))) | |
affbf647 GM |
695 | |
696 | ;;;###autoload | |
697 | (defun pcomplete-comint-setup (completef-sym) | |
698 | "Setup a comint buffer to use pcomplete. | |
699 | COMPLETEF-SYM should be the symbol where the | |
21a2e05d JB |
700 | dynamic-complete-functions are kept. For comint mode itself, |
701 | this is `comint-dynamic-complete-functions'." | |
affbf647 GM |
702 | (set (make-local-variable 'pcomplete-parse-arguments-function) |
703 | 'pcomplete-parse-comint-arguments) | |
1c6d8c76 SM |
704 | (add-hook 'completion-at-point-functions |
705 | 'pcomplete-completions-at-point nil 'local) | |
48feed59 SM |
706 | (set (make-local-variable completef-sym) |
707 | (copy-sequence (symbol-value completef-sym))) | |
208384c5 | 708 | (let* ((funs (symbol-value completef-sym)) |
8fff8daa SM |
709 | (elem (or (memq 'comint-filename-completion funs) |
710 | (memq 'shell-filename-completion funs) | |
711 | (memq 'shell-dynamic-complete-filename funs) | |
70f44c65 | 712 | (memq 'comint-dynamic-complete-filename funs)))) |
affbf647 GM |
713 | (if elem |
714 | (setcar elem 'pcomplete) | |
22eb1d41 | 715 | (add-to-list completef-sym 'pcomplete)))) |
affbf647 GM |
716 | |
717 | ;;;###autoload | |
718 | (defun pcomplete-shell-setup () | |
3b067af1 | 719 | "Setup `shell-mode' to use pcomplete." |
2d085307 | 720 | ;; FIXME: insufficient |
48feed59 | 721 | (pcomplete-comint-setup 'comint-dynamic-complete-functions)) |
affbf647 | 722 | |
004a00f4 DN |
723 | (declare-function comint-bol "comint" (&optional arg)) |
724 | ||
affbf647 GM |
725 | (defun pcomplete-parse-comint-arguments () |
726 | "Parse whitespace separated arguments in the current region." | |
59f7af81 | 727 | (declare (obsolete comint-parse-pcomplete-arguments "24.1")) |
affbf647 GM |
728 | (let ((begin (save-excursion (comint-bol nil) (point))) |
729 | (end (point)) | |
730 | begins args) | |
731 | (save-excursion | |
732 | (goto-char begin) | |
733 | (while (< (point) end) | |
734 | (skip-chars-forward " \t\n") | |
48feed59 | 735 | (push (point) begins) |
b3fd59bd SM |
736 | (while |
737 | (progn | |
738 | (skip-chars-forward "^ \t\n\\") | |
739 | (when (eq (char-after) ?\\) | |
740 | (forward-char 1) | |
741 | (unless (eolp) | |
742 | (forward-char 1) | |
743 | t)))) | |
48feed59 SM |
744 | (push (buffer-substring-no-properties (car begins) (point)) |
745 | args)) | |
746 | (cons (nreverse args) (nreverse begins))))) | |
affbf647 GM |
747 | |
748 | (defun pcomplete-parse-arguments (&optional expand-p) | |
749 | "Parse the command line arguments. Most completions need this info." | |
750 | (let ((results (funcall pcomplete-parse-arguments-function))) | |
751 | (when results | |
752 | (setq pcomplete-args (or (car results) (list "")) | |
753 | pcomplete-begins (or (cdr results) (list (point))) | |
754 | pcomplete-last (1- (length pcomplete-args)) | |
755 | pcomplete-index 0 | |
756 | pcomplete-stub (pcomplete-arg 'last)) | |
757 | (let ((begin (pcomplete-begin 'last))) | |
758 | (if (and pcomplete-cycle-completions | |
48feed59 | 759 | (listp pcomplete-stub) ;?? |
affbf647 | 760 | (not pcomplete-expand-only-p)) |
48feed59 | 761 | (let* ((completions pcomplete-stub) ;?? |
affbf647 GM |
762 | (common-stub (car completions)) |
763 | (c completions) | |
764 | (len (length common-stub))) | |
765 | (while (and c (> len 0)) | |
766 | (while (and (> len 0) | |
767 | (not (string= | |
768 | (substring common-stub 0 len) | |
769 | (substring (car c) 0 | |
770 | (min (length (car c)) | |
771 | len))))) | |
772 | (setq len (1- len))) | |
773 | (setq c (cdr c))) | |
774 | (setq pcomplete-stub (substring common-stub 0 len) | |
775 | pcomplete-autolist t) | |
776 | (when (and begin (not pcomplete-show-list)) | |
777 | (delete-region begin (point)) | |
778 | (pcomplete-insert-entry "" pcomplete-stub)) | |
779 | (throw 'pcomplete-completions completions)) | |
780 | (when expand-p | |
781 | (if (stringp pcomplete-stub) | |
782 | (when begin | |
783 | (delete-region begin (point)) | |
784 | (insert-and-inherit pcomplete-stub)) | |
785 | (if (and (listp pcomplete-stub) | |
786 | pcomplete-expand-only-p) | |
787 | ;; this is for the benefit of `pcomplete-expand' | |
788 | (setq pcomplete-last-completion-length (- (point) begin) | |
789 | pcomplete-current-completions pcomplete-stub) | |
790 | (error "Cannot expand argument")))) | |
791 | (if pcomplete-expand-only-p | |
792 | (throw 'pcompleted t) | |
793 | pcomplete-args)))))) | |
794 | ||
b4ff4f1f | 795 | (define-obsolete-function-alias |
2a1e2476 | 796 | 'pcomplete-quote-argument #'comint-quote-filename "24.3") |
affbf647 GM |
797 | |
798 | ;; file-system completion lists | |
799 | ||
800 | (defsubst pcomplete-dirs-or-entries (&optional regexp predicate) | |
801 | "Return either directories, or qualified entries." | |
3b067af1 SM |
802 | (pcomplete-entries |
803 | nil | |
1c6d8c76 SM |
804 | (lambda (f) |
805 | (or (file-directory-p f) | |
806 | (and (or (null regexp) (string-match regexp f)) | |
807 | (or (null predicate) (funcall predicate f))))))) | |
808 | ||
809 | (defun pcomplete--entries (&optional regexp predicate) | |
810 | "Like `pcomplete-entries' but without env-var handling." | |
811 | (let* ((ign-pred | |
812 | (when (or pcomplete-file-ignore pcomplete-dir-ignore) | |
813 | ;; Capture the dynbound value for later use. | |
814 | (let ((file-ignore pcomplete-file-ignore) | |
815 | (dir-ignore pcomplete-dir-ignore)) | |
816 | (lambda (file) | |
817 | (not | |
818 | (if (eq (aref file (1- (length file))) ?/) | |
819 | (and dir-ignore (string-match dir-ignore file)) | |
820 | (and file-ignore (string-match file-ignore file)))))))) | |
821 | (reg-pred (if regexp (lambda (file) (string-match regexp file)))) | |
822 | (pred (cond | |
823 | ((null (or ign-pred reg-pred)) predicate) | |
824 | ((null (or ign-pred predicate)) reg-pred) | |
825 | ((null (or reg-pred predicate)) ign-pred) | |
826 | (t (lambda (f) | |
827 | (and (or (null reg-pred) (funcall reg-pred f)) | |
828 | (or (null ign-pred) (funcall ign-pred f)) | |
829 | (or (null predicate) (funcall predicate f)))))))) | |
830 | (lambda (s p a) | |
831 | (if (and (eq a 'metadata) pcomplete-compare-entry-function) | |
832 | `(metadata (cycle-sort-function | |
833 | . ,(lambda (comps) | |
834 | (sort comps pcomplete-compare-entry-function))) | |
835 | ,@(cdr (completion-file-name-table s p a))) | |
93b05041 SM |
836 | (let ((completion-ignored-extensions nil) |
837 | (completion-ignore-case pcomplete-ignore-case)) | |
1c6d8c76 | 838 | (completion-table-with-predicate |
32c1fffd | 839 | #'comint-completion-file-name-table pred 'strict s p a)))))) |
1c6d8c76 SM |
840 | |
841 | (defconst pcomplete--env-regexp | |
842 | "\\(?:\\`\\|[^\\]\\)\\(?:\\\\\\\\\\)*\\(\\$\\(?:{\\([^}]+\\)}\\|\\(?2:[[:alnum:]_]+\\)\\)\\)") | |
affbf647 GM |
843 | |
844 | (defun pcomplete-entries (&optional regexp predicate) | |
845 | "Complete against a list of directory candidates. | |
affbf647 GM |
846 | If REGEXP is non-nil, it is a regular expression used to refine the |
847 | match (files not matching the REGEXP will be excluded). | |
848 | If PREDICATE is non-nil, it will also be used to refine the match | |
849 | \(files for which the PREDICATE returns nil will be excluded). | |
430190ba | 850 | If no directory information can be extracted from the completed |
21a2e05d | 851 | component, `default-directory' is used as the basis for completion." |
1c6d8c76 SM |
852 | ;; FIXME: The old code did env-var expansion here, so we reproduce this |
853 | ;; behavior for now, but really env-var handling should be performed globally | |
854 | ;; rather than here since it also applies to non-file arguments. | |
855 | (let ((table (pcomplete--entries regexp predicate))) | |
856 | (lambda (string pred action) | |
857 | (let ((strings nil) | |
858 | (orig-length (length string))) | |
859 | ;; Perform env-var expansion. | |
860 | (while (string-match pcomplete--env-regexp string) | |
861 | (push (substring string 0 (match-beginning 1)) strings) | |
862 | (push (getenv (match-string 2 string)) strings) | |
863 | (setq string (substring string (match-end 1)))) | |
864 | (if (not (and strings | |
865 | (or (eq action t) | |
866 | (eq (car-safe action) 'boundaries)))) | |
867 | (let ((newstring | |
868 | (mapconcat 'identity (nreverse (cons string strings)) ""))) | |
869 | ;; FIXME: We could also try to return unexpanded envvars. | |
870 | (complete-with-action action table newstring pred)) | |
871 | (let* ((envpos (apply #'+ (mapcar #' length strings))) | |
872 | (newstring | |
873 | (mapconcat 'identity (nreverse (cons string strings)) "")) | |
874 | (bounds (completion-boundaries newstring table pred | |
875 | (or (cdr-safe action) "")))) | |
876 | (if (>= (car bounds) envpos) | |
877 | ;; The env-var is "out of bounds". | |
878 | (if (eq action t) | |
879 | (complete-with-action action table newstring pred) | |
f58e0fd5 SM |
880 | `(boundaries |
881 | ,(+ (car bounds) (- orig-length (length newstring))) | |
882 | . ,(cdr bounds))) | |
1c6d8c76 SM |
883 | ;; The env-var is in the file bounds. |
884 | (if (eq action t) | |
885 | (let ((comps (complete-with-action | |
886 | action table newstring pred)) | |
887 | (len (- envpos (car bounds)))) | |
888 | ;; Strip the part of each completion that's actually | |
889 | ;; coming from the env-var. | |
890 | (mapcar (lambda (s) (substring s len)) comps)) | |
f58e0fd5 SM |
891 | `(boundaries |
892 | ,(+ envpos (- orig-length (length newstring))) | |
893 | . ,(cdr bounds)))))))))) | |
affbf647 GM |
894 | |
895 | (defsubst pcomplete-all-entries (&optional regexp predicate) | |
896 | "Like `pcomplete-entries', but doesn't ignore any entries." | |
897 | (let (pcomplete-file-ignore | |
898 | pcomplete-dir-ignore) | |
899 | (pcomplete-entries regexp predicate))) | |
900 | ||
901 | (defsubst pcomplete-dirs (&optional regexp) | |
902 | "Complete amongst a list of directories." | |
903 | (pcomplete-entries regexp 'file-directory-p)) | |
904 | ||
affbf647 GM |
905 | ;; generation of completion lists |
906 | ||
907 | (defun pcomplete-find-completion-function (command) | |
908 | "Find the completion function to call for the given COMMAND." | |
909 | (let ((sym (intern-soft | |
910 | (concat "pcomplete/" (symbol-name major-mode) "/" command)))) | |
911 | (unless sym | |
912 | (setq sym (intern-soft (concat "pcomplete/" command)))) | |
913 | (and sym (fboundp sym) sym))) | |
914 | ||
915 | (defun pcomplete-completions () | |
916 | "Return a list of completions for the current argument position." | |
917 | (catch 'pcomplete-completions | |
918 | (when (pcomplete-parse-arguments pcomplete-expand-before-complete) | |
919 | (if (= pcomplete-index pcomplete-last) | |
920 | (funcall pcomplete-command-completion-function) | |
921 | (let ((sym (or (pcomplete-find-completion-function | |
922 | (funcall pcomplete-command-name-function)) | |
923 | pcomplete-default-completion-function))) | |
924 | (ignore | |
925 | (pcomplete-next-arg) | |
926 | (funcall sym))))))) | |
927 | ||
06b60517 | 928 | (defun pcomplete-opt (options &optional prefix _no-ganging _args-follow) |
affbf647 GM |
929 | "Complete a set of OPTIONS, each beginning with PREFIX (?- by default). |
930 | PREFIX may be t, in which case no PREFIX character is necessary. | |
21a2e05d JB |
931 | If NO-GANGING is non-nil, each option is separate (-xy is not allowed). |
932 | If ARGS-FOLLOW is non-nil, then options which take arguments may have | |
933 | the argument appear after a ganged set of options. This is how tar | |
06b60517 JB |
934 | behaves, for example. |
935 | Arguments NO-GANGING and ARGS-FOLLOW are currently ignored." | |
affbf647 GM |
936 | (if (and (= pcomplete-index pcomplete-last) |
937 | (string= (pcomplete-arg) "-")) | |
938 | (let ((len (length options)) | |
939 | (index 0) | |
940 | char choices) | |
941 | (while (< index len) | |
942 | (setq char (aref options index)) | |
943 | (if (eq char ?\() | |
944 | (let ((result (read-from-string options index))) | |
945 | (setq index (cdr result))) | |
946 | (unless (memq char '(?/ ?* ?? ?.)) | |
0667de21 | 947 | (push (char-to-string char) choices)) |
affbf647 GM |
948 | (setq index (1+ index)))) |
949 | (throw 'pcomplete-completions | |
950 | (mapcar | |
951 | (function | |
952 | (lambda (opt) | |
953 | (concat "-" opt))) | |
954 | (pcomplete-uniqify-list choices)))) | |
955 | (let ((arg (pcomplete-arg))) | |
956 | (when (and (> (length arg) 1) | |
957 | (stringp arg) | |
958 | (eq (aref arg 0) (or prefix ?-))) | |
959 | (pcomplete-next-arg) | |
960 | (let ((char (aref arg 1)) | |
961 | (len (length options)) | |
962 | (index 0) | |
963 | opt-char arg-char result) | |
964 | (while (< (1+ index) len) | |
965 | (setq opt-char (aref options index) | |
966 | arg-char (aref options (1+ index))) | |
967 | (if (eq arg-char ?\() | |
968 | (setq result | |
969 | (read-from-string options (1+ index)) | |
970 | index (cdr result) | |
971 | result (car result)) | |
972 | (setq result nil)) | |
973 | (when (and (eq char opt-char) | |
974 | (memq arg-char '(?\( ?/ ?* ?? ?.))) | |
975 | (if (< pcomplete-index pcomplete-last) | |
976 | (pcomplete-next-arg) | |
977 | (throw 'pcomplete-completions | |
978 | (cond ((eq arg-char ?/) (pcomplete-dirs)) | |
979 | ((eq arg-char ?*) (pcomplete-executables)) | |
980 | ((eq arg-char ??) nil) | |
981 | ((eq arg-char ?.) (pcomplete-entries)) | |
982 | ((eq arg-char ?\() (eval result)))))) | |
983 | (setq index (1+ index)))))))) | |
984 | ||
985 | (defun pcomplete--here (&optional form stub paring form-only) | |
21a2e05d | 986 | "Complete against the current argument, if at the end. |
affbf647 GM |
987 | See the documentation for `pcomplete-here'." |
988 | (if (< pcomplete-index pcomplete-last) | |
989 | (progn | |
990 | (if (eq paring 0) | |
991 | (setq pcomplete-seen nil) | |
992 | (unless (eq paring t) | |
993 | (let ((arg (pcomplete-arg))) | |
3b067af1 | 994 | (when (stringp arg) |
0667de21 SM |
995 | (push (if paring |
996 | (funcall paring arg) | |
997 | (file-truename arg)) | |
998 | pcomplete-seen))))) | |
affbf647 GM |
999 | (pcomplete-next-arg) |
1000 | t) | |
1001 | (when pcomplete-show-help | |
1002 | (pcomplete--help) | |
1003 | (throw 'pcompleted t)) | |
1004 | (if stub | |
1005 | (setq pcomplete-stub stub)) | |
1006 | (if (or (eq paring t) (eq paring 0)) | |
1007 | (setq pcomplete-seen nil) | |
1008 | (setq pcomplete-norm-func (or paring 'file-truename))) | |
1009 | (unless form-only | |
1010 | (run-hooks 'pcomplete-try-first-hook)) | |
3b067af1 SM |
1011 | (throw 'pcomplete-completions |
1012 | (if (functionp form) | |
1013 | (funcall form) | |
1014 | ;; Old calling convention, might still be used by files | |
1015 | ;; byte-compiled with the older code. | |
1016 | (eval form))))) | |
affbf647 GM |
1017 | |
1018 | (defmacro pcomplete-here (&optional form stub paring form-only) | |
21a2e05d | 1019 | "Complete against the current argument, if at the end. |
3b067af1 SM |
1020 | If completion is to be done here, evaluate FORM to generate the completion |
1021 | table which will be used for completion purposes. If STUB is a | |
affbf647 GM |
1022 | string, use it as the completion stub instead of the default (which is |
1023 | the entire text of the current argument). | |
1024 | ||
1025 | For an example of when you might want to use STUB: if the current | |
1026 | argument text is 'long-path-name/', you don't want the completions | |
1027 | list display to be cluttered by 'long-path-name/' appearing at the | |
1028 | beginning of every alternative. Not only does this make things less | |
3b067af1 | 1029 | intelligible, but it is also inefficient. Yet, if the completion list |
affbf647 GM |
1030 | does not begin with this string for every entry, the current argument |
1031 | won't complete correctly. | |
1032 | ||
1033 | The solution is to specify a relative stub. It allows you to | |
1034 | substitute a different argument from the current argument, almost | |
1035 | always for the sake of efficiency. | |
1036 | ||
1037 | If PARING is nil, this argument will be pared against previous | |
1038 | arguments using the function `file-truename' to normalize them. | |
21a2e05d JB |
1039 | PARING may be a function, in which case that function is used for |
1040 | normalization. If PARING is t, the argument dealt with by this | |
1041 | call will not participate in argument paring. If it is the | |
1042 | integer 0, all previous arguments that have been seen will be | |
1043 | cleared. | |
affbf647 GM |
1044 | |
1045 | If FORM-ONLY is non-nil, only the result of FORM will be used to | |
1046 | generate the completions list. This means that the hook | |
1047 | `pcomplete-try-first-hook' will not be run." | |
3b067af1 SM |
1048 | (declare (debug t)) |
1049 | `(pcomplete--here (lambda () ,form) ,stub ,paring ,form-only)) | |
1050 | ||
affbf647 GM |
1051 | |
1052 | (defmacro pcomplete-here* (&optional form stub form-only) | |
1053 | "An alternate form which does not participate in argument paring." | |
3b067af1 | 1054 | (declare (debug t)) |
5b31b787 | 1055 | `(pcomplete-here ,form ,stub t ,form-only)) |
affbf647 GM |
1056 | |
1057 | ;; display support | |
1058 | ||
1059 | (defun pcomplete-restore-windows () | |
1060 | "If the only window change was due to Completions, restore things." | |
1061 | (if pcomplete-last-window-config | |
1062 | (let* ((cbuf (get-buffer "*Completions*")) | |
1063 | (cwin (and cbuf (get-buffer-window cbuf)))) | |
ccb13f4d | 1064 | (when (window-live-p cwin) |
affbf647 GM |
1065 | (bury-buffer cbuf) |
1066 | (set-window-configuration pcomplete-last-window-config)))) | |
1067 | (setq pcomplete-last-window-config nil | |
1068 | pcomplete-window-restore-timer nil)) | |
1069 | ||
1070 | ;; Abstractions so that the code below will work for both Emacs 20 and | |
1071 | ;; XEmacs 21 | |
1072 | ||
a3269bc4 DN |
1073 | (defalias 'pcomplete-event-matches-key-specifier-p |
1074 | (if (featurep 'xemacs) | |
1075 | 'event-matches-key-specifier-p | |
1076 | 'eq)) | |
affbf647 | 1077 | |
2d8e5088 RS |
1078 | (defun pcomplete-read-event (&optional prompt) |
1079 | (if (fboundp 'read-event) | |
1080 | (read-event prompt) | |
affbf647 GM |
1081 | (aref (read-key-sequence prompt) 0))) |
1082 | ||
affbf647 GM |
1083 | (defun pcomplete-show-completions (completions) |
1084 | "List in help buffer sorted COMPLETIONS. | |
1085 | Typing SPC flushes the help buffer." | |
3b067af1 SM |
1086 | (when pcomplete-window-restore-timer |
1087 | (cancel-timer pcomplete-window-restore-timer) | |
1088 | (setq pcomplete-window-restore-timer nil)) | |
1089 | (unless pcomplete-last-window-config | |
1090 | (setq pcomplete-last-window-config (current-window-configuration))) | |
1091 | (with-output-to-temp-buffer "*Completions*" | |
1092 | (display-completion-list completions)) | |
147c0425 | 1093 | (minibuffer-message "Hit space to flush") |
3b067af1 SM |
1094 | (let (event) |
1095 | (prog1 | |
1096 | (catch 'done | |
1097 | (while (with-current-buffer (get-buffer "*Completions*") | |
1098 | (setq event (pcomplete-read-event))) | |
1099 | (cond | |
1100 | ((pcomplete-event-matches-key-specifier-p event ?\s) | |
1101 | (set-window-configuration pcomplete-last-window-config) | |
1102 | (setq pcomplete-last-window-config nil) | |
1103 | (throw 'done nil)) | |
1104 | ((or (pcomplete-event-matches-key-specifier-p event 'tab) | |
1105 | ;; Needed on a terminal | |
1106 | (pcomplete-event-matches-key-specifier-p event 9)) | |
1107 | (let ((win (or (get-buffer-window "*Completions*" 0) | |
1108 | (display-buffer "*Completions*" | |
1109 | 'not-this-window)))) | |
1110 | (with-selected-window win | |
1111 | (if (pos-visible-in-window-p (point-max)) | |
1112 | (goto-char (point-min)) | |
1113 | (scroll-up)))) | |
1114 | (message "")) | |
1115 | (t | |
1116 | (setq unread-command-events (list event)) | |
1117 | (throw 'done nil))))) | |
1118 | (if (and pcomplete-last-window-config | |
1119 | pcomplete-restore-window-delay) | |
1120 | (setq pcomplete-window-restore-timer | |
1121 | (run-with-timer pcomplete-restore-window-delay nil | |
1122 | 'pcomplete-restore-windows)))))) | |
affbf647 GM |
1123 | |
1124 | ;; insert completion at point | |
1125 | ||
1126 | (defun pcomplete-insert-entry (stub entry &optional addsuffix raw-p) | |
1127 | "Insert a completion entry at point. | |
1128 | Returns non-nil if a space was appended at the end." | |
1129 | (let ((here (point))) | |
1130 | (if (not pcomplete-ignore-case) | |
1131 | (insert-and-inherit (if raw-p | |
1132 | (substring entry (length stub)) | |
b4ff4f1f | 1133 | (comint-quote-filename |
affbf647 GM |
1134 | (substring entry (length stub))))) |
1135 | ;; the stub is not quoted at this time, so to determine the | |
1136 | ;; length of what should be in the buffer, we must quote it | |
48feed59 SM |
1137 | ;; FIXME: Here we presume that quoting `stub' gives us the exact |
1138 | ;; text in the buffer before point, which is not guaranteed; | |
1139 | ;; e.g. it is not the case in eshell when completing ${FOO}tm[TAB]. | |
b4ff4f1f | 1140 | (delete-char (- (length (comint-quote-filename stub)))) |
affbf647 GM |
1141 | ;; if there is already a backslash present to handle the first |
1142 | ;; character, don't bother quoting it | |
1143 | (when (eq (char-before) ?\\) | |
1144 | (insert-and-inherit (substring entry 0 1)) | |
1145 | (setq entry (substring entry 1))) | |
1146 | (insert-and-inherit (if raw-p | |
1147 | entry | |
b4ff4f1f | 1148 | (comint-quote-filename entry)))) |
affbf647 GM |
1149 | (let (space-added) |
1150 | (when (and (not (memq (char-before) pcomplete-suffix-list)) | |
1151 | addsuffix) | |
150158c4 | 1152 | (insert-and-inherit pcomplete-termination-string) |
affbf647 GM |
1153 | (setq space-added t)) |
1154 | (setq pcomplete-last-completion-length (- (point) here) | |
1155 | pcomplete-last-completion-stub stub) | |
1156 | space-added))) | |
1157 | ||
b4ff4f1f | 1158 | ;; Selection of completions. |
affbf647 GM |
1159 | |
1160 | (defun pcomplete-do-complete (stub completions) | |
1161 | "Dynamically complete at point using STUB and COMPLETIONS. | |
1162 | This is basically just a wrapper for `pcomplete-stub' which does some | |
1163 | extra checking, and munging of the COMPLETIONS list." | |
1164 | (unless (stringp stub) | |
1165 | (message "Cannot complete argument") | |
1166 | (throw 'pcompleted nil)) | |
1167 | (if (null completions) | |
1168 | (ignore | |
1169 | (if (and stub (> (length stub) 0)) | |
1170 | (message "No completions of %s" stub) | |
1171 | (message "No completions"))) | |
1172 | ;; pare it down, if applicable | |
3b067af1 SM |
1173 | (when (and pcomplete-use-paring pcomplete-seen) |
1174 | (setq pcomplete-seen | |
1175 | (mapcar 'directory-file-name pcomplete-seen)) | |
1176 | (dolist (p pcomplete-seen) | |
1177 | (add-to-list 'pcomplete-seen | |
1178 | (funcall pcomplete-norm-func p))) | |
1179 | (setq completions | |
1180 | (apply-partially 'completion-table-with-predicate | |
1181 | completions | |
8fff8daa SM |
1182 | (when pcomplete-seen |
1183 | (lambda (f) | |
1184 | (not (member | |
1185 | (funcall pcomplete-norm-func | |
1186 | (directory-file-name f)) | |
1187 | pcomplete-seen)))) | |
3b067af1 | 1188 | 'strict))) |
affbf647 GM |
1189 | ;; OK, we've got a list of completions. |
1190 | (if pcomplete-show-list | |
3b067af1 SM |
1191 | ;; FIXME: pay attention to boundaries. |
1192 | (pcomplete-show-completions (all-completions stub completions)) | |
affbf647 GM |
1193 | (pcomplete-stub stub completions)))) |
1194 | ||
1195 | (defun pcomplete-stub (stub candidates &optional cycle-p) | |
1196 | "Dynamically complete STUB from CANDIDATES list. | |
1197 | This function inserts completion characters at point by completing | |
1198 | STUB from the strings in CANDIDATES. A completions listing may be | |
1199 | shown in a help buffer if completion is ambiguous. | |
1200 | ||
1201 | Returns nil if no completion was inserted. | |
1202 | Returns `sole' if completed with the only completion match. | |
1203 | Returns `shortest' if completed with the shortest of the matches. | |
1204 | Returns `partial' if completed as far as possible with the matches. | |
1205 | Returns `listed' if a completion listing was shown. | |
1206 | ||
1207 | See also `pcomplete-filename'." | |
1208 | (let* ((completion-ignore-case pcomplete-ignore-case) | |
3b067af1 SM |
1209 | (completions (all-completions stub candidates)) |
1210 | (entry (try-completion stub candidates)) | |
1211 | result) | |
1212 | (cond | |
1213 | ((null entry) | |
1214 | (if (and stub (> (length stub) 0)) | |
1215 | (message "No completions of %s" stub) | |
1216 | (message "No completions"))) | |
1217 | ((eq entry t) | |
1218 | (setq entry stub) | |
1219 | (message "Sole completion") | |
1220 | (setq result 'sole)) | |
1221 | ((= 1 (length completions)) | |
1222 | (setq result 'sole)) | |
1223 | ((and pcomplete-cycle-completions | |
1224 | (or cycle-p | |
1225 | (not pcomplete-cycle-cutoff-length) | |
1226 | (<= (length completions) | |
1227 | pcomplete-cycle-cutoff-length))) | |
1228 | (let ((bound (car (completion-boundaries stub candidates nil "")))) | |
1229 | (unless (zerop bound) | |
1230 | (setq completions (mapcar (lambda (c) (concat (substring stub 0 bound) c)) | |
1231 | completions))) | |
1232 | (setq entry (car completions) | |
1233 | pcomplete-current-completions completions))) | |
1234 | ((and pcomplete-recexact | |
1235 | (string-equal stub entry) | |
1236 | (member entry completions)) | |
1237 | ;; It's not unique, but user wants shortest match. | |
1238 | (message "Completed shortest") | |
1239 | (setq result 'shortest)) | |
1240 | ((or pcomplete-autolist | |
1241 | (string-equal stub entry)) | |
1242 | ;; It's not unique, list possible completions. | |
1243 | ;; FIXME: pay attention to boundaries. | |
1244 | (pcomplete-show-completions completions) | |
1245 | (setq result 'listed)) | |
1246 | (t | |
1247 | (message "Partially completed") | |
1248 | (setq result 'partial))) | |
1249 | (cons result entry))) | |
affbf647 GM |
1250 | |
1251 | ;; context sensitive help | |
1252 | ||
1253 | (defun pcomplete--help () | |
1254 | "Produce context-sensitive help for the current argument. | |
21a2e05d | 1255 | If specific documentation can't be given, be generic." |
affbf647 GM |
1256 | (if (and pcomplete-help |
1257 | (or (and (stringp pcomplete-help) | |
1258 | (fboundp 'Info-goto-node)) | |
1259 | (listp pcomplete-help))) | |
1260 | (if (listp pcomplete-help) | |
8a26c165 | 1261 | (message "%s" (eval pcomplete-help)) |
affbf647 GM |
1262 | (save-window-excursion (info)) |
1263 | (switch-to-buffer-other-window "*info*") | |
1264 | (funcall (symbol-function 'Info-goto-node) pcomplete-help)) | |
1265 | (if pcomplete-man-function | |
1266 | (let ((cmd (funcall pcomplete-command-name-function))) | |
1267 | (if (and cmd (> (length cmd) 0)) | |
1268 | (funcall pcomplete-man-function cmd))) | |
1269 | (message "No context-sensitive help available")))) | |
1270 | ||
1271 | ;; general utilities | |
1272 | ||
affbf647 GM |
1273 | (defun pcomplete-uniqify-list (l) |
1274 | "Sort and remove multiples in L." | |
1275 | (setq l (sort l 'string-lessp)) | |
1276 | (let ((m l)) | |
1277 | (while m | |
1278 | (while (and (cdr m) | |
1279 | (string= (car m) | |
1280 | (cadr m))) | |
1281 | (setcdr m (cddr m))) | |
1282 | (setq m (cdr m)))) | |
1283 | l) | |
1284 | ||
1285 | (defun pcomplete-process-result (cmd &rest args) | |
1286 | "Call CMD using `call-process' and return the simplest result." | |
1287 | (with-temp-buffer | |
1288 | (apply 'call-process cmd nil t nil args) | |
1289 | (skip-chars-backward "\n") | |
1290 | (buffer-substring (point-min) (point)))) | |
1291 | ||
1292 | ;; create a set of aliases which allow completion functions to be not | |
1293 | ;; quite so verbose | |
1294 | ||
3b067af1 SM |
1295 | ;;; jww (1999-10-20): are these a good idea? |
1296 | ;; (defalias 'pc-here 'pcomplete-here) | |
1297 | ;; (defalias 'pc-test 'pcomplete-test) | |
1298 | ;; (defalias 'pc-opt 'pcomplete-opt) | |
1299 | ;; (defalias 'pc-match 'pcomplete-match) | |
1300 | ;; (defalias 'pc-match-string 'pcomplete-match-string) | |
1301 | ;; (defalias 'pc-match-beginning 'pcomplete-match-beginning) | |
1302 | ;; (defalias 'pc-match-end 'pcomplete-match-end) | |
1303 | ||
1304 | (provide 'pcomplete) | |
affbf647 GM |
1305 | |
1306 | ;;; pcomplete.el ends here |