Commit | Line | Data |
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fa157191 | 1 | ;;; icomplete.el --- minibuffer completion incremental feedback |
239c87a1 | 2 | |
ba318903 | 3 | ;; Copyright (C) 1992-1994, 1997, 1999, 2001-2014 Free Software |
ab422c4d | 4 | ;; Foundation, Inc. |
d462ff97 | 5 | |
1934dbf4 GM |
6 | ;; Author: Ken Manheimer <klm@i.am> |
7 | ;; Maintainer: Ken Manheimer <klm@i.am> | |
8 | ;; Created: Mar 1993 Ken Manheimer, klm@nist.gov - first release to usenet | |
9 | ;; Last update: Ken Manheimer <klm@i.am>, 11/18/1999. | |
be010748 | 10 | ;; Keywords: help, abbrev |
d462ff97 | 11 | |
239c87a1 | 12 | ;; This file is part of GNU Emacs. |
d462ff97 | 13 | |
eb3fa2cf | 14 | ;; GNU Emacs is free software: you can redistribute it and/or modify |
239c87a1 | 15 | ;; it under the terms of the GNU General Public License as published by |
eb3fa2cf GM |
16 | ;; the Free Software Foundation, either version 3 of the License, or |
17 | ;; (at your option) any later version. | |
d462ff97 | 18 | |
239c87a1 RS |
19 | ;; GNU Emacs is distributed in the hope that it will be useful, |
20 | ;; but WITHOUT ANY WARRANTY; without even the implied warranty of | |
21 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
22 | ;; GNU General Public License for more details. | |
c89164c5 | 23 | |
239c87a1 | 24 | ;; You should have received a copy of the GNU General Public License |
eb3fa2cf | 25 | ;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. |
d462ff97 | 26 | |
239c87a1 | 27 | ;;; Commentary: |
d462ff97 | 28 | |
b578f267 EN |
29 | ;; Loading this package implements a more fine-grained minibuffer |
30 | ;; completion feedback scheme. Prospective completions are concisely | |
31 | ;; indicated within the minibuffer itself, with each successive | |
32 | ;; keystroke. | |
33 | ||
5e537651 | 34 | ;; See `icomplete-completions' docstring for a description of the |
b578f267 EN |
35 | ;; icomplete display format. |
36 | ||
37 | ;; See the `icomplete-minibuffer-setup-hook' docstring for a means to | |
38 | ;; customize icomplete setup for interoperation with other | |
39 | ;; minibuffer-oriented packages. | |
40 | ||
1934dbf4 GM |
41 | ;; To activate icomplete mode, load the package and use the |
42 | ;; `icomplete-mode' function. You can subsequently deactivate it by | |
43 | ;; invoking the function icomplete-mode with a negative prefix-arg | |
44 | ;; (C-U -1 ESC-x icomplete-mode). Also, you can prevent activation of | |
45 | ;; the mode during package load by first setting the variable | |
46 | ;; `icomplete-mode' to nil. Icompletion can be enabled any time after | |
47 | ;; the package is loaded by invoking icomplete-mode without a prefix | |
48 | ;; arg. | |
92f7d003 | 49 | |
b578f267 EN |
50 | ;; Thanks to everyone for their suggestions for refinements of this |
51 | ;; package. I particularly have to credit Michael Cook, who | |
52 | ;; implemented an incremental completion style in his 'iswitch' | |
53 | ;; functions that served as a model for icomplete. Some other | |
5e537651 | 54 | ;; contributors: Noah Friedman (restructuring as minor mode), Colin |
1be5a284 | 55 | ;; Rafferty (lemacs reconciliation), Lars Lindberg, RMS, and others. |
b578f267 EN |
56 | |
57 | ;; klm. | |
c89164c5 | 58 | |
239c87a1 RS |
59 | ;;; Code: |
60 | ||
5e537651 SE |
61 | (defgroup icomplete nil |
62 | "Show completions dynamically in minibuffer." | |
63 | :prefix "icomplete-" | |
64 | :group 'minibuffer) | |
65 | ||
c2d0b538 SM |
66 | (defvar icomplete-prospects-length 80) |
67 | (make-obsolete-variable | |
68 | 'icomplete-prospects-length 'icomplete-prospects-height "23.1") | |
69 | ||
cc37e70f J |
70 | (defcustom icomplete-separator " | " |
71 | "String used by icomplete to separate alternatives in the minibuffer." | |
72 | :type 'string | |
fb3bf6ce | 73 | :version "24.4") |
cc37e70f | 74 | |
5cbfe5b9 J |
75 | (defcustom icomplete-hide-common-prefix t |
76 | "When non-nil, hide common prefix from completion candidates. | |
77 | When nil, show candidates in full." | |
78 | :type 'boolean | |
d64b6308 DC |
79 | :version "24.4") |
80 | ||
a4151f3b | 81 | (defcustom icomplete-show-matches-on-no-input nil |
d64b6308 DC |
82 | "When non-nil, show completions when first prompting for input." |
83 | :type 'boolean | |
84 | :version "24.4") | |
5cbfe5b9 J |
85 | |
86 | (defface icomplete-first-match '((t :weight bold)) | |
87 | "Face used by icomplete for highlighting first match." | |
d64b6308 | 88 | :version "24.4") |
5cbfe5b9 | 89 | |
1934dbf4 | 90 | ;;;_* User Customization variables |
c2d0b538 SM |
91 | (defcustom icomplete-prospects-height |
92 | ;; 20 is an estimated common size for the prompt + minibuffer content, to | |
93 | ;; try to guess the number of lines used up by icomplete-prospects-length. | |
94 | (+ 1 (/ (+ icomplete-prospects-length 20) (window-width))) | |
95 | "Maximum number of lines to use in the minibuffer." | |
dfb4dab1 | 96 | :type 'integer |
af09cfd7 | 97 | :version "23.1") |
1934dbf4 | 98 | |
5e537651 | 99 | (defcustom icomplete-compute-delay .3 |
077aec27 JB |
100 | "Completions-computation stall, used only with large-number completions. |
101 | See `icomplete-delay-completions-threshold'." | |
d64b6308 | 102 | :type 'number) |
5e537651 SE |
103 | |
104 | (defcustom icomplete-delay-completions-threshold 400 | |
077aec27 | 105 | "Pending-completions number over which to apply `icomplete-compute-delay'." |
d64b6308 | 106 | :type 'integer) |
5e537651 SE |
107 | |
108 | (defcustom icomplete-max-delay-chars 3 | |
077aec27 | 109 | "Maximum number of initial chars to apply icomplete compute delay." |
d64b6308 | 110 | :type 'integer) |
5e537651 | 111 | |
504a0381 SM |
112 | (defvar icomplete-in-buffer nil |
113 | "If non-nil, also use Icomplete when completing in non-mini buffers.") | |
114 | ||
5e537651 | 115 | (defcustom icomplete-minibuffer-setup-hook nil |
077aec27 | 116 | "Icomplete-specific customization of minibuffer setup. |
239c87a1 | 117 | |
4837b516 | 118 | This hook is run during minibuffer setup if icomplete is active. |
239c87a1 | 119 | It is intended for use in customizing icomplete for interoperation |
9c8acefd | 120 | with other features and packages. For instance: |
239c87a1 | 121 | |
92f7d003 | 122 | \(add-hook 'icomplete-minibuffer-setup-hook |
239c87a1 RS |
123 | \(function |
124 | \(lambda () | |
9c8acefd EZ |
125 | \(make-local-variable 'max-mini-window-height) |
126 | \(setq max-mini-window-height 3)))) | |
239c87a1 | 127 | |
9c8acefd | 128 | will constrain Emacs to a maximum minibuffer height of 3 lines when |
5e537651 SE |
129 | icompletion is occurring." |
130 | :type 'hook | |
131 | :group 'icomplete) | |
132 | ||
133 | ||
134 | ;;;_* Initialization | |
d462ff97 | 135 | |
c89164c5 | 136 | ;;;_ + Internal Variables |
47fda8fc | 137 | ;;;_ = icomplete-eoinput nil |
31d4b748 SM |
138 | (defvar icomplete-overlay (make-overlay (point-min) (point-min) nil t t) |
139 | "Overlay used to display the list of completions.") | |
140 | ||
504a0381 SM |
141 | (defun icomplete-pre-command-hook () |
142 | (let ((non-essential t)) | |
143 | (icomplete-tidy))) | |
239c87a1 | 144 | |
504a0381 SM |
145 | (defun icomplete-post-command-hook () |
146 | (let ((non-essential t)) ;E.g. don't prompt for password! | |
147 | (icomplete-exhibit))) | |
239c87a1 | 148 | |
397e713b | 149 | ;;;_ = icomplete-with-completion-tables |
67982e2b | 150 | (defcustom icomplete-with-completion-tables t |
397e713b CY |
151 | "Specialized completion tables with which icomplete should operate. |
152 | ||
153 | Icomplete does not operate with any specialized completion tables | |
67982e2b | 154 | except those on this list." |
846ffe77 | 155 | :version "24.4" |
67982e2b SM |
156 | :type '(choice (const :tag "All" t) |
157 | (repeat function))) | |
92f7d003 | 158 | |
cc37e70f J |
159 | (defvar icomplete-minibuffer-map |
160 | (let ((map (make-sparse-keymap))) | |
161 | (define-key map [?\M-\t] 'minibuffer-force-complete) | |
162 | (define-key map [?\C-j] 'minibuffer-force-complete-and-exit) | |
d7e76a89 J |
163 | (define-key map [?\C-.] 'icomplete-forward-completions) |
164 | (define-key map [?\C-,] 'icomplete-backward-completions) | |
cc37e70f J |
165 | map)) |
166 | ||
167 | (defun icomplete-forward-completions () | |
168 | "Step forward completions by one entry. | |
169 | Second entry becomes the first and can be selected with | |
170 | `minibuffer-force-complete-and-exit'." | |
171 | (interactive) | |
504a0381 SM |
172 | (let* ((beg (icomplete--field-beg)) |
173 | (end (icomplete--field-end)) | |
67982e2b | 174 | (comps (completion-all-sorted-completions beg end)) |
cc37e70f | 175 | (last (last comps))) |
6130b96a J |
176 | (when comps |
177 | (setcdr last (cons (car comps) (cdr last))) | |
67982e2b | 178 | (completion--cache-all-sorted-completions beg end (cdr comps))))) |
cc37e70f J |
179 | |
180 | (defun icomplete-backward-completions () | |
181 | "Step backward completions by one entry. | |
182 | Last entry becomes the first and can be selected with | |
183 | `minibuffer-force-complete-and-exit'." | |
184 | (interactive) | |
504a0381 SM |
185 | (let* ((beg (icomplete--field-beg)) |
186 | (end (icomplete--field-end)) | |
67982e2b | 187 | (comps (completion-all-sorted-completions beg end)) |
cc37e70f J |
188 | (last-but-one (last comps 2)) |
189 | (last (cdr last-but-one))) | |
6130b96a | 190 | (when (consp last) ; At least two elements in comps |
cc37e70f J |
191 | (setcdr last-but-one (cdr last)) |
192 | (push (car last) comps) | |
67982e2b | 193 | (completion--cache-all-sorted-completions beg end comps)))) |
cc37e70f | 194 | |
239c87a1 | 195 | ;;;_ > icomplete-mode (&optional prefix) |
c89164c5 | 196 | ;;;###autoload |
47fda8fc | 197 | (define-minor-mode icomplete-mode |
06e21633 CY |
198 | "Toggle incremental minibuffer completion (Icomplete mode). |
199 | With a prefix argument ARG, enable Icomplete mode if ARG is | |
200 | positive, and disable it otherwise. If called from Lisp, enable | |
201 | the mode if ARG is omitted or nil." | |
47fda8fc | 202 | :global t :group 'icomplete |
504a0381 SM |
203 | (remove-hook 'minibuffer-setup-hook #'icomplete-minibuffer-setup) |
204 | (remove-hook 'completion-in-region-mode-hook #'icomplete--in-region-setup) | |
205 | (when icomplete-mode | |
206 | (when icomplete-in-buffer | |
207 | (add-hook 'completion-in-region-mode-hook #'icomplete--in-region-setup)) | |
208 | (add-hook 'minibuffer-setup-hook #'icomplete-minibuffer-setup))) | |
209 | ||
210 | (defun icomplete--completion-table () | |
211 | (if (window-minibuffer-p) minibuffer-completion-table | |
212 | (or (nth 2 completion-in-region--data) | |
213 | (message "In %S (w=%S): %S" | |
214 | (current-buffer) (selected-window) (window-minibuffer-p))))) | |
215 | (defun icomplete--completion-predicate () | |
216 | (if (window-minibuffer-p) minibuffer-completion-predicate | |
217 | (nth 3 completion-in-region--data))) | |
218 | (defun icomplete--field-string () | |
219 | (if (window-minibuffer-p) (minibuffer-contents) | |
220 | (buffer-substring-no-properties | |
221 | (nth 0 completion-in-region--data) | |
222 | (nth 1 completion-in-region--data)))) | |
223 | (defun icomplete--field-beg () | |
224 | (if (window-minibuffer-p) (minibuffer-prompt-end) | |
225 | (nth 0 completion-in-region--data))) | |
226 | (defun icomplete--field-end () | |
227 | (if (window-minibuffer-p) (point-max) | |
228 | (nth 1 completion-in-region--data))) | |
239c87a1 RS |
229 | |
230 | ;;;_ > icomplete-simple-completing-p () | |
231 | (defun icomplete-simple-completing-p () | |
239c87a1 RS |
232 | "Non-nil if current window is minibuffer that's doing simple completion. |
233 | ||
234 | Conditions are: | |
235 | the selected window is a minibuffer, | |
236 | and not in the middle of macro execution, | |
504a0381 | 237 | and the completion table is not a function (which would |
81276211 | 238 | indicate some non-standard, non-simple completion mechanism, |
239c87a1 RS |
239 | like file-name and other custom-func completions)." |
240 | ||
504a0381 SM |
241 | (unless executing-kbd-macro |
242 | (let ((table (icomplete--completion-table))) | |
243 | (and table | |
244 | (or (not (functionp table)) | |
245 | (eq icomplete-with-completion-tables t) | |
246 | (member table icomplete-with-completion-tables)))))) | |
d183f322 | 247 | |
239c87a1 | 248 | ;;;_ > icomplete-minibuffer-setup () |
239c87a1 | 249 | (defun icomplete-minibuffer-setup () |
239c87a1 | 250 | "Run in minibuffer on activation to establish incremental completion. |
d183f322 | 251 | Usually run by inclusion in `minibuffer-setup-hook'." |
47fda8fc | 252 | (when (and icomplete-mode (icomplete-simple-completing-p)) |
2176854d | 253 | (set (make-local-variable 'completion-show-inline-help) nil) |
cc37e70f J |
254 | (use-local-map (make-composed-keymap icomplete-minibuffer-map |
255 | (current-local-map))) | |
504a0381 SM |
256 | (add-hook 'pre-command-hook #'icomplete-pre-command-hook nil t) |
257 | (add-hook 'post-command-hook #'icomplete-post-command-hook nil t) | |
d64b6308 DC |
258 | (run-hooks 'icomplete-minibuffer-setup-hook) |
259 | (when icomplete-show-matches-on-no-input | |
260 | (icomplete-exhibit)))) | |
504a0381 SM |
261 | |
262 | (defvar icomplete--in-region-buffer nil) | |
263 | ||
264 | (defun icomplete--in-region-setup () | |
265 | (when (or (not completion-in-region-mode) | |
266 | (and icomplete--in-region-buffer | |
267 | (not (eq icomplete--in-region-buffer (current-buffer))))) | |
268 | (with-current-buffer (or icomplete--in-region-buffer (current-buffer)) | |
269 | (setq icomplete--in-region-buffer nil) | |
270 | (delete-overlay icomplete-overlay) | |
271 | (kill-local-variable 'completion-show-inline-help) | |
272 | (remove-hook 'pre-command-hook 'icomplete-pre-command-hook t) | |
273 | (remove-hook 'post-command-hook 'icomplete-post-command-hook t) | |
274 | (message nil))) | |
275 | (when (and completion-in-region-mode | |
276 | icomplete-mode (icomplete-simple-completing-p)) | |
277 | (setq icomplete--in-region-buffer (current-buffer)) | |
278 | (set (make-local-variable 'completion-show-inline-help) nil) | |
279 | (let ((tem (assq 'completion-in-region-mode | |
280 | minor-mode-overriding-map-alist))) | |
281 | (unless (memq icomplete-minibuffer-map (cdr tem)) | |
282 | (setcdr tem (make-composed-keymap icomplete-minibuffer-map | |
283 | (cdr tem))))) | |
284 | (add-hook 'pre-command-hook 'icomplete-pre-command-hook nil t) | |
285 | (add-hook 'post-command-hook 'icomplete-post-command-hook nil t))) | |
286 | \f | |
1934dbf4 GM |
287 | |
288 | ||
239c87a1 RS |
289 | ;;;_* Completion |
290 | ||
291 | ;;;_ > icomplete-tidy () | |
292 | (defun icomplete-tidy () | |
293 | "Remove completions display \(if any) prior to new user input. | |
d183f322 | 294 | Should be run in on the minibuffer `pre-command-hook'. See `icomplete-mode' |
239c87a1 | 295 | and `minibuffer-setup-hook'." |
31d4b748 | 296 | (delete-overlay icomplete-overlay)) |
d183f322 | 297 | |
239c87a1 | 298 | ;;;_ > icomplete-exhibit () |
d462ff97 | 299 | (defun icomplete-exhibit () |
239c87a1 | 300 | "Insert icomplete completions display. |
d183f322 | 301 | Should be run via minibuffer `post-command-hook'. See `icomplete-mode' |
239c87a1 | 302 | and `minibuffer-setup-hook'." |
67982e2b SM |
303 | (when (and icomplete-mode |
304 | (icomplete-simple-completing-p)) ;Shouldn't be necessary. | |
47fda8fc SM |
305 | (save-excursion |
306 | (goto-char (point-max)) | |
d462ff97 | 307 | ; Insert the match-status information: |
d64b6308 DC |
308 | (if (and (or icomplete-show-matches-on-no-input |
309 | (> (icomplete--field-end) (icomplete--field-beg))) | |
cc37e70f J |
310 | (or |
311 | ;; Don't bother with delay after certain number of chars: | |
504a0381 SM |
312 | (> (- (point) (icomplete--field-beg)) |
313 | icomplete-max-delay-chars) | |
cc37e70f J |
314 | ;; Don't delay if the completions are known. |
315 | completion-all-sorted-completions | |
316 | ;; Don't delay if alternatives number is small enough: | |
504a0381 SM |
317 | (and (sequencep (icomplete--completion-table)) |
318 | (< (length (icomplete--completion-table)) | |
cc37e70f J |
319 | icomplete-delay-completions-threshold)) |
320 | ;; Delay - give some grace time for next keystroke, before | |
47fda8fc SM |
321 | ;; embarking on computing completions: |
322 | (sit-for icomplete-compute-delay))) | |
504a0381 SM |
323 | (let* ((field-string (icomplete--field-string)) |
324 | (text (while-no-input | |
325 | (icomplete-completions | |
326 | field-string | |
327 | (icomplete--completion-table) | |
328 | (icomplete--completion-predicate) | |
329 | (if (window-minibuffer-p) | |
330 | (not minibuffer-completion-confirm))))) | |
331 | (buffer-undo-list t) | |
332 | deactivate-mark) | |
9a84ddd8 | 333 | ;; Do nothing if while-no-input was aborted. |
cc37e70f | 334 | (when (stringp text) |
31d4b748 SM |
335 | (move-overlay icomplete-overlay (point) (point) (current-buffer)) |
336 | ;; The current C cursor code doesn't know to use the overlay's | |
337 | ;; marker's stickiness to figure out whether to place the cursor | |
338 | ;; before or after the string, so let's spoon-feed it the pos. | |
339 | (put-text-property 0 1 'cursor t text) | |
340 | (overlay-put icomplete-overlay 'after-string text))))))) | |
d183f322 | 341 | |
239c87a1 RS |
342 | ;;;_ > icomplete-completions (name candidates predicate require-match) |
343 | (defun icomplete-completions (name candidates predicate require-match) | |
d462ff97 RS |
344 | "Identify prospective candidates for minibuffer completion. |
345 | ||
c89164c5 | 346 | The display is updated with each minibuffer keystroke during |
d462ff97 RS |
347 | minibuffer completion. |
348 | ||
349 | Prospective completion suffixes (if any) are displayed, bracketed by | |
350 | one of \(), \[], or \{} pairs. The choice of brackets is as follows: | |
351 | ||
352 | \(...) - a single prospect is identified and matching is enforced, | |
353 | \[...] - a single prospect is identified but matching is optional, or | |
354 | \{...} - multiple prospects, separated by commas, are indicated, and | |
81276211 | 355 | further input is required to distinguish a single one. |
d462ff97 | 356 | |
81276211 | 357 | The displays for unambiguous matches have ` [Matched]' appended |
d183f322 | 358 | \(whether complete or not), or ` \[No matches]', if no eligible |
1be5a284 | 359 | matches exist. \(Keybindings for uniquely matched commands |
92f7d003 KH |
360 | are exhibited within the square braces.)" |
361 | ||
504a0381 SM |
362 | (let* ((minibuffer-completion-table candidates) |
363 | (minibuffer-completion-predicate predicate) | |
364 | (md (completion--field-metadata (icomplete--field-beg))) | |
67982e2b | 365 | (comps (completion-all-sorted-completions |
504a0381 | 366 | (icomplete--field-beg) (icomplete--field-end))) |
31d4b748 SM |
367 | (last (if (consp comps) (last comps))) |
368 | (base-size (cdr last)) | |
476d2aef SM |
369 | (open-bracket (if require-match "(" "[")) |
370 | (close-bracket (if require-match ")" "]"))) | |
c2d0b538 | 371 | ;; `concat'/`mapconcat' is the slow part. |
31d4b748 | 372 | (if (not (consp comps)) |
504a0381 SM |
373 | (progn ;;(debug (format "Candidates=%S field=%S" candidates name)) |
374 | (format " %sNo matches%s" open-bracket close-bracket)) | |
31d4b748 | 375 | (if last (setcdr last nil)) |
be91065f SM |
376 | (let* ((most-try |
377 | (if (and base-size (> base-size 0)) | |
378 | (completion-try-completion | |
620c53a6 | 379 | name candidates predicate (length name) md) |
be91065f SM |
380 | ;; If the `comps' are 0-based, the result should be |
381 | ;; the same with `comps'. | |
382 | (completion-try-completion | |
620c53a6 | 383 | name comps nil (length name) md))) |
31d4b748 SM |
384 | (most (if (consp most-try) (car most-try) |
385 | (if most-try (car comps) ""))) | |
476d2aef SM |
386 | ;; Compare name and most, so we can determine if name is |
387 | ;; a prefix of most, or something else. | |
388 | (compare (compare-strings name nil nil | |
389 | most nil nil completion-ignore-case)) | |
390 | (determ (unless (or (eq t compare) (eq t most-try) | |
391 | (= (setq compare (1- (abs compare))) | |
392 | (length most))) | |
393 | (concat open-bracket | |
394 | (cond | |
395 | ((= compare (length name)) | |
396 | ;; Typical case: name is a prefix. | |
397 | (substring most compare)) | |
2387610d SM |
398 | ;; Don't bother truncating if it doesn't gain |
399 | ;; us at least 2 columns. | |
400 | ((< compare 3) most) | |
401 | (t (concat "…" (substring most compare)))) | |
476d2aef | 402 | close-bracket))) |
47fda8fc | 403 | ;;"-prospects" - more than one candidate |
5cbfe5b9 J |
404 | (prospects-len (+ (string-width |
405 | (or determ (concat open-bracket close-bracket))) | |
bdd9367d WD |
406 | (string-width icomplete-separator) |
407 | 3 ;; take {…} into account | |
408 | (string-width (buffer-string)))) | |
c2d0b538 SM |
409 | (prospects-max |
410 | ;; Max total length to use, including the minibuffer content. | |
29f313d7 | 411 | (* (+ icomplete-prospects-height |
c2d0b538 SM |
412 | ;; If the minibuffer content already uses up more than |
413 | ;; one line, increase the allowable space accordingly. | |
414 | (/ prospects-len (window-width))) | |
415 | (window-width))) | |
aa2bddd7 SM |
416 | ;; Find the common prefix among `comps'. |
417 | ;; We can't use the optimization below because its assumptions | |
418 | ;; aren't always true, e.g. when completion-cycling (bug#10850): | |
419 | ;; (if (eq t (compare-strings (car comps) nil (length most) | |
420 | ;; most nil nil completion-ignore-case)) | |
421 | ;; ;; Common case. | |
422 | ;; (length most) | |
423 | ;; Else, use try-completion. | |
5cbfe5b9 J |
424 | (prefix (when icomplete-hide-common-prefix |
425 | (try-completion "" comps))) | |
476d2aef | 426 | (prefix-len |
aa2bddd7 SM |
427 | (and (stringp prefix) |
428 | ;; Only hide the prefix if the corresponding info | |
429 | ;; is already displayed via `most'. | |
430 | (string-prefix-p prefix most t) | |
431 | (length prefix))) ;;) | |
5cbfe5b9 | 432 | prospects comp limit) |
504a0381 | 433 | (if (or (eq most-try t) (not (consp (cdr comps)))) |
1934dbf4 | 434 | (setq prospects nil) |
5cbfe5b9 J |
435 | (when (member name comps) |
436 | ;; NAME is complete but not unique. This scenario poses | |
437 | ;; following UI issues: | |
438 | ;; | |
439 | ;; - When `icomplete-hide-common-prefix' is non-nil, NAME | |
440 | ;; is stripped empty. This would make the entry | |
441 | ;; inconspicuous. | |
442 | ;; | |
443 | ;; - Due to sorting of completions, NAME may not be the | |
444 | ;; first of the prospects and could be hidden deep in | |
445 | ;; the displayed string. | |
446 | ;; | |
447 | ;; - Because of `icomplete-prospects-height' , NAME may | |
448 | ;; not even be displayed to the user. | |
449 | ;; | |
450 | ;; To circumvent all the above problems, provide a visual | |
451 | ;; cue to the user via an "empty string" in the try | |
452 | ;; completion field. | |
453 | (setq determ (concat open-bracket "" close-bracket))) | |
454 | ;; Compute prospects for display. | |
7d94fb17 | 455 | (while (and comps (not limit)) |
476d2aef | 456 | (setq comp |
8f0fde21 | 457 | (if prefix-len (substring (car comps) prefix-len) (car comps)) |
1934dbf4 | 458 | comps (cdr comps)) |
5cbfe5b9 | 459 | (setq prospects-len |
bdd9367d WD |
460 | (+ (string-width comp) |
461 | (string-width icomplete-separator) | |
462 | prospects-len)) | |
c2d0b538 | 463 | (if (< prospects-len prospects-max) |
31d4b748 | 464 | (push comp prospects) |
5cbfe5b9 J |
465 | (setq limit t)))) |
466 | (setq prospects (nreverse prospects)) | |
467 | ;; Decorate first of the prospects. | |
468 | (when prospects | |
469 | (let ((first (copy-sequence (pop prospects)))) | |
470 | (put-text-property 0 (length first) | |
471 | 'face 'icomplete-first-match first) | |
472 | (push first prospects))) | |
31d4b748 SM |
473 | ;; Restore the base-size info, since completion-all-sorted-completions |
474 | ;; is cached. | |
475 | (if last (setcdr last base-size)) | |
1934dbf4 GM |
476 | (if prospects |
477 | (concat determ | |
47fda8fc | 478 | "{" |
5cbfe5b9 | 479 | (mapconcat 'identity prospects icomplete-separator) |
cc37e70f | 480 | (and limit (concat icomplete-separator "…")) |
47fda8fc | 481 | "}") |
cc37e70f | 482 | (concat determ " [Matched]")))))) |
d462ff97 | 483 | |
0da54898 DC |
484 | ;;;_* Provide |
485 | (provide 'icomplete) | |
486 | ||
476d2aef SM |
487 | ;;_* Local emacs vars. |
488 | ;;Local variables: | |
489 | ;;allout-layout: (-2 :) | |
490 | ;;End: | |
d462ff97 RS |
491 | |
492 | ;;; icomplete.el ends here |