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e8af40ee | 1 | ;;; apropos.el --- apropos commands for users and programmers |
c0274f38 | 2 | |
7dbffb1c | 3 | ;; Copyright (C) 1989, 1994, 1995, 2001, 2002 Free Software Foundation, Inc. |
9750e079 | 4 | |
e5167999 | 5 | ;; Author: Joe Wells <jbw@bigbird.bu.edu> |
ae212837 | 6 | ;; Rewritten: Daniel Pfeiffer <occitan@esperanto.org> |
e9571d2a | 7 | ;; Keywords: help |
e5167999 | 8 | |
6f8e447f RS |
9 | ;; This file is part of GNU Emacs. |
10 | ||
11 | ;; GNU Emacs is free software; you can redistribute it and/or modify | |
12 | ;; it under the terms of the GNU General Public License as published by | |
e5167999 | 13 | ;; the Free Software Foundation; either version 2, or (at your option) |
6f8e447f RS |
14 | ;; any later version. |
15 | ||
16 | ;; GNU Emacs is distributed in the hope that it will be useful, | |
17 | ;; but WITHOUT ANY WARRANTY; without even the implied warranty of | |
18 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
19 | ;; GNU General Public License for more details. | |
20 | ||
21 | ;; You should have received a copy of the GNU General Public License | |
b578f267 EN |
22 | ;; along with GNU Emacs; see the file COPYING. If not, write to the |
23 | ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
24 | ;; Boston, MA 02111-1307, USA. | |
6f8e447f | 25 | |
e5167999 | 26 | ;;; Commentary: |
6f8e447f RS |
27 | |
28 | ;; The ideas for this package were derived from the C code in | |
29 | ;; src/keymap.c and elsewhere. The functions in this file should | |
30 | ;; always be byte-compiled for speed. Someone should rewrite this in | |
31 | ;; C (as part of src/keymap.c) for speed. | |
32 | ||
33 | ;; The idea for super-apropos is based on the original implementation | |
34 | ;; by Lynn Slater <lrs@esl.com>. | |
35 | ||
36 | ;; History: | |
37 | ;; Fixed bug, current-local-map can return nil. | |
38 | ;; Change, doesn't calculate key-bindings unless needed. | |
39 | ;; Added super-apropos capability, changed print functions. | |
3925e76d KH |
40 | ;;; Made fast-apropos and super-apropos share code. |
41 | ;;; Sped up fast-apropos again. | |
6f8e447f | 42 | ;; Added apropos-do-all option. |
3925e76d | 43 | ;;; Added fast-command-apropos. |
6f8e447f | 44 | ;; Changed doc strings to comments for helping functions. |
3925e76d | 45 | ;;; Made doc file buffer read-only, buried it. |
6f8e447f RS |
46 | ;; Only call substitute-command-keys if do-all set. |
47 | ||
645c4f6a KH |
48 | ;; Optionally use configurable faces to make the output more legible. |
49 | ;; Differentiate between command, function and macro. | |
3925e76d KH |
50 | ;; Apropos-command (ex command-apropos) does cmd and optionally user var. |
51 | ;; Apropos shows all 3 aspects of symbols (fn, var and plist) | |
52 | ;; Apropos-documentation (ex super-apropos) now finds all it should. | |
53 | ;; New apropos-value snoops through all values and optionally plists. | |
54 | ;; Reading DOC file doesn't load nroff. | |
55 | ;; Added hypertext following of documentation, mouse-2 on variable gives value | |
56 | ;; from buffer in active window. | |
57 | ||
e5167999 ER |
58 | ;;; Code: |
59 | ||
851befd4 MB |
60 | (require 'button) |
61 | ||
ddd2f740 RS |
62 | (defgroup apropos nil |
63 | "Apropos commands for users and programmers" | |
c906e3ab | 64 | :group 'help |
ddd2f740 RS |
65 | :prefix "apropos") |
66 | ||
3925e76d | 67 | ;; I see a degradation of maybe 10-20% only. |
ddd2f740 | 68 | (defcustom apropos-do-all nil |
3925e76d | 69 | "*Whether the apropos commands should do more. |
ddd2f740 RS |
70 | |
71 | Slows them down more or less. Set this non-nil if you have a fast machine." | |
72 | :group 'apropos | |
73 | :type 'boolean) | |
3925e76d KH |
74 | |
75 | ||
07eeca5d RS |
76 | (defcustom apropos-symbol-face 'bold |
77 | "*Face for symbol name in Apropos output, or nil for none." | |
ddd2f740 RS |
78 | :group 'apropos |
79 | :type 'face) | |
645c4f6a | 80 | |
07eeca5d RS |
81 | (defcustom apropos-keybinding-face 'underline |
82 | "*Face for lists of keybinding in Apropos output, or nil for none." | |
ddd2f740 RS |
83 | :group 'apropos |
84 | :type 'face) | |
645c4f6a | 85 | |
07eeca5d RS |
86 | (defcustom apropos-label-face 'italic |
87 | "*Face for label (`Command', `Variable' ...) in Apropos output. | |
88 | A value of nil means don't use any special font for them, and also | |
89 | turns off mouse highlighting." | |
ddd2f740 RS |
90 | :group 'apropos |
91 | :type 'face) | |
645c4f6a | 92 | |
07eeca5d RS |
93 | (defcustom apropos-property-face 'bold-italic |
94 | "*Face for property name in apropos output, or nil for none." | |
ddd2f740 RS |
95 | :group 'apropos |
96 | :type 'face) | |
645c4f6a | 97 | |
07eeca5d RS |
98 | (defcustom apropos-match-face 'secondary-selection |
99 | "*Face for matching text in Apropos documentation/value, or nil for none. | |
100 | This applies when you look for matches in the documentation or variable value | |
101 | for the regexp; the part that matches gets displayed in this font." | |
ddd2f740 RS |
102 | :group 'apropos |
103 | :type 'face) | |
3925e76d | 104 | |
6f8e447f | 105 | |
26a4a227 | 106 | (defvar apropos-mode-map |
3925e76d | 107 | (let ((map (make-sparse-keymap))) |
e517f56d MB |
108 | (set-keymap-parent map button-buffer-map) |
109 | ;; Use `apropos-follow' instead of just using the button | |
110 | ;; definition of RET, so that users can use it anywhere in an | |
111 | ;; apropos item, not just on top of a button. | |
3925e76d | 112 | (define-key map "\C-m" 'apropos-follow) |
5b23b5e4 RS |
113 | (define-key map " " 'scroll-up) |
114 | (define-key map "\177" 'scroll-down) | |
115 | (define-key map "q" 'quit-window) | |
3925e76d | 116 | map) |
26a4a227 | 117 | "Keymap used in Apropos mode.") |
4de5599d | 118 | |
45f485a6 GM |
119 | (defvar apropos-mode-hook nil |
120 | "*Hook run when mode is turned on.") | |
3925e76d | 121 | |
7dbffb1c KS |
122 | (defvar apropos-show-scores nil |
123 | "*Show apropos scores if non-nil.") | |
124 | ||
645c4f6a KH |
125 | (defvar apropos-regexp nil |
126 | "Regexp used in current apropos run.") | |
127 | ||
7dbffb1c KS |
128 | (defvar apropos-orig-regexp nil |
129 | "Regexp as entered by user.") | |
130 | ||
131 | (defvar apropos-all-regexp nil | |
132 | "Regexp matching apropos-all-words.") | |
133 | ||
645c4f6a | 134 | (defvar apropos-files-scanned () |
1259a080 | 135 | "List of elc files already scanned in current run of `apropos-documentation'.") |
645c4f6a KH |
136 | |
137 | (defvar apropos-accumulator () | |
138 | "Alist of symbols already found in current apropos run.") | |
3925e76d | 139 | |
645c4f6a | 140 | (defvar apropos-item () |
7a5348db | 141 | "Current item in or for `apropos-accumulator'.") |
e517f56d | 142 | |
7dbffb1c KS |
143 | (defvar apropos-synonyms '( |
144 | ("find" "open" "edit") | |
145 | ("kill" "cut") | |
146 | ("yank" "paste")) | |
147 | "List of synonyms known by apropos. | |
148 | Each element is a list of words where the first word is the standard emacs | |
149 | term, and the rest of the words are alternative terms.") | |
150 | ||
151 | (defvar apropos-words () | |
152 | "Current list of words.") | |
153 | ||
154 | (defvar apropos-all-words () | |
155 | "Current list of words and synonyms.") | |
156 | ||
e517f56d MB |
157 | \f |
158 | ;;; Button types used by apropos | |
159 | ||
160 | (define-button-type 'apropos-symbol | |
161 | 'face apropos-symbol-face | |
894e460c MB |
162 | 'help-echo "mouse-2, RET: Display more help on this symbol" |
163 | 'action #'apropos-symbol-button-display-help | |
164 | 'skip t) | |
e517f56d MB |
165 | |
166 | (defun apropos-symbol-button-display-help (button) | |
167 | "Display further help for the `apropos-symbol' button BUTTON." | |
168 | (button-activate | |
169 | (or (apropos-next-label-button (button-start button)) | |
170 | (error "There is nothing to follow for `%s'" (button-label button))))) | |
171 | ||
894e460c MB |
172 | (define-button-type 'apropos-function |
173 | 'apropos-label "Function" | |
174 | 'action (lambda (button) | |
175 | (describe-function (button-get button 'apropos-symbol))) | |
176 | 'help-echo "mouse-2, RET: Display more help on this function") | |
177 | (define-button-type 'apropos-macro | |
178 | 'apropos-label "Macro" | |
179 | 'action (lambda (button) | |
180 | (describe-function (button-get button 'apropos-symbol))) | |
181 | 'help-echo "mouse-2, RET: Display more help on this macro") | |
182 | (define-button-type 'apropos-command | |
183 | 'apropos-label "Command" | |
184 | 'action (lambda (button) | |
185 | (describe-function (button-get button 'apropos-symbol))) | |
186 | 'help-echo "mouse-2, RET: Display more help on this command") | |
7cfedc97 | 187 | |
894e460c MB |
188 | ;; We used to use `customize-variable-other-window' instead for a |
189 | ;; customizable variable, but that is slow. It is better to show an | |
190 | ;; ordinary help buffer and let the user click on the customization | |
191 | ;; button in that buffer, if he wants to. | |
192 | ;; Likewise for `customize-face-other-window'. | |
193 | (define-button-type 'apropos-variable | |
194 | 'apropos-label "Variable" | |
195 | 'help-echo "mouse-2, RET: Display more help on this variable" | |
196 | 'action (lambda (button) | |
197 | (describe-variable (button-get button 'apropos-symbol)))) | |
198 | ||
199 | (define-button-type 'apropos-face | |
200 | 'apropos-label "Face" | |
201 | 'help-echo "mouse-2, RET: Display more help on this face" | |
202 | 'action (lambda (button) | |
203 | (describe-face (button-get button 'apropos-symbol)))) | |
204 | ||
205 | (define-button-type 'apropos-group | |
206 | 'apropos-label "Group" | |
207 | 'help-echo "mouse-2, RET: Display more help on this group" | |
208 | 'action (lambda (button) | |
2d37b91e | 209 | (customize-group-other-window |
894e460c MB |
210 | (button-get button 'apropos-symbol)))) |
211 | ||
212 | (define-button-type 'apropos-widget | |
213 | 'apropos-label "Widget" | |
214 | 'help-echo "mouse-2, RET: Display more help on this widget" | |
215 | 'action (lambda (button) | |
216 | (widget-browse-other-window (button-get button 'apropos-symbol)))) | |
217 | ||
218 | (define-button-type 'apropos-plist | |
219 | 'apropos-label "Plist" | |
220 | 'help-echo "mouse-2, RET: Display more help on this plist" | |
221 | 'action (lambda (button) | |
222 | (apropos-describe-plist (button-get button 'apropos-symbol)))) | |
e517f56d MB |
223 | |
224 | (defun apropos-next-label-button (pos) | |
a11a4e9f | 225 | "Return the next apropos label button after POS, or nil if there's none. |
e517f56d MB |
226 | Will also return nil if more than one `apropos-symbol' button is encountered |
227 | before finding a label." | |
a101302b | 228 | (let* ((button (next-button pos t)) |
e517f56d | 229 | (already-hit-symbol nil) |
3b8c60f1 MB |
230 | (label (and button (button-get button 'apropos-label))) |
231 | (type (and button (button-get button 'type)))) | |
e517f56d | 232 | (while (and button |
3b8c60f1 MB |
233 | (not label) |
234 | (or (not (eq type 'apropos-symbol)) | |
e517f56d | 235 | (not already-hit-symbol))) |
3b8c60f1 | 236 | (when (eq type 'apropos-symbol) |
e517f56d MB |
237 | (setq already-hit-symbol t)) |
238 | (setq button (next-button (button-start button))) | |
239 | (when button | |
3b8c60f1 MB |
240 | (setq label (button-get button 'apropos-label)) |
241 | (setq type (button-get button 'type)))) | |
242 | (and label button))) | |
e517f56d | 243 | |
645c4f6a | 244 | \f |
7dbffb1c KS |
245 | (defun apropos-words-to-regexp (words wild) |
246 | "Make regexp matching any two of the words in WORDS." | |
247 | (concat "\\(" | |
248 | (mapconcat 'identity words "\\|") | |
249 | "\\)" wild | |
250 | (if (cdr words) | |
251 | (concat "\\(" | |
252 | (mapconcat 'identity words "\\|") | |
253 | "\\)") | |
254 | ""))) | |
255 | ||
256 | (defun apropos-rewrite-regexp (regexp) | |
257 | "Rewrite a list of words to a regexp matching all permutations. | |
258 | If REGEXP is already a regexp, don't modify it." | |
259 | (setq apropos-orig-regexp regexp) | |
260 | (setq apropos-words () apropos-all-words ()) | |
261 | (if (string-equal (regexp-quote regexp) regexp) | |
262 | ;; We don't actually make a regexp matching all permutations. | |
263 | ;; Instead, for e.g. "a b c", we make a regexp matching | |
264 | ;; any combination of two or more words like this: | |
265 | ;; (a|b|c).*(a|b|c) which may give some false matches, | |
266 | ;; but as long as it also gives the right ones, that's ok. | |
267 | (let ((words (split-string regexp "[ \t]+"))) | |
268 | (dolist (word words) | |
269 | (let ((syn apropos-synonyms) (s word) (a word)) | |
270 | (while syn | |
271 | (if (member word (car syn)) | |
272 | (progn | |
273 | (setq a (mapconcat 'identity (car syn) "\\|")) | |
274 | (if (member word (cdr (car syn))) | |
275 | (setq s a)) | |
276 | (setq syn nil)) | |
277 | (setq syn (cdr syn)))) | |
278 | (setq apropos-words (cons s apropos-words) | |
279 | apropos-all-words (cons a apropos-all-words)))) | |
280 | (setq apropos-all-regexp (apropos-words-to-regexp apropos-all-words ".+")) | |
281 | (apropos-words-to-regexp apropos-words ".*?")) | |
282 | (setq apropos-all-regexp regexp))) | |
283 | ||
284 | (defun apropos-calc-scores (str words) | |
285 | "Return apropos scores for string STR matching WORDS. | |
286 | Value is a list of offsets of the words into the string." | |
287 | (let ((scores ()) | |
288 | i) | |
289 | (if words | |
290 | (dolist (word words scores) | |
291 | (if (setq i (string-match word str)) | |
292 | (setq scores (cons i scores)))) | |
293 | ;; Return list of start and end position of regexp | |
294 | (string-match apropos-regexp str) | |
295 | (list (match-beginning 0) (match-end 0))))) | |
296 | ||
297 | (defun apropos-score-str (str) | |
298 | "Return apropos score for string STR." | |
299 | (if str | |
d5857a96 KS |
300 | (let* ( |
301 | (l (length str)) | |
302 | (score (- (/ l 10))) | |
7dbffb1c KS |
303 | i) |
304 | (dolist (s (apropos-calc-scores str apropos-all-words) score) | |
d5857a96 | 305 | (setq score (+ score 1000 (/ (* (- l s) 1000) l))))) |
7dbffb1c KS |
306 | 0)) |
307 | ||
308 | (defun apropos-score-doc (doc) | |
309 | "Return apropos score for documentation string DOC." | |
310 | (if doc | |
311 | (let ((score 0) | |
312 | (l (length doc)) | |
313 | i) | |
314 | (dolist (s (apropos-calc-scores doc apropos-all-words) score) | |
315 | (setq score (+ score 50 (/ (* (- l s) 50) l))))) | |
316 | 0)) | |
317 | ||
318 | (defun apropos-score-symbol (symbol &optional weight) | |
319 | "Return apropos score for SYMBOL." | |
320 | (setq symbol (symbol-name symbol)) | |
321 | (let ((score 0) | |
322 | (l (length symbol)) | |
323 | i) | |
324 | (dolist (s (apropos-calc-scores symbol apropos-words) (* score (or weight 3))) | |
325 | (setq score (+ score (- 60 l) (/ (* (- l s) 60) l)))))) | |
326 | ||
d2b30292 KS |
327 | (defun apropos-true-hit (str words) |
328 | "Return t if STR is a genuine hit. | |
329 | This may fail if only one of the keywords is matched more than once. | |
330 | This requires that at least 2 keywords (unless only one was given)." | |
331 | (or (not str) | |
332 | (not words) | |
333 | (not (cdr words)) | |
334 | (> (length (apropos-calc-scores str words)) 1))) | |
335 | ||
336 | (defun apropos-false-hit-symbol (symbol) | |
337 | "Return t if SYMBOL is not really matched by the current keywords." | |
338 | (not (apropos-true-hit (symbol-name symbol) apropos-words))) | |
339 | ||
340 | (defun apropos-false-hit-str (str) | |
341 | "Return t if STR is not really matched by the current keywords." | |
342 | (not (apropos-true-hit str apropos-words))) | |
343 | ||
344 | (defun apropos-true-hit-doc (doc) | |
345 | "Return t if DOC is really matched by the current keywords." | |
346 | (apropos-true-hit doc apropos-all-words)) | |
347 | ||
bd041ace | 348 | ;;;###autoload |
38ab866c | 349 | (define-derived-mode apropos-mode fundamental-mode "Apropos" |
26a4a227 KH |
350 | "Major mode for following hyperlinks in output of apropos commands. |
351 | ||
38ab866c | 352 | \\{apropos-mode-map}") |
26a4a227 | 353 | |
f38fd610 | 354 | ;;;###autoload |
05942d06 RS |
355 | (defun apropos-variable (regexp &optional do-all) |
356 | "Show user variables that match REGEXP. | |
7a5348db | 357 | With optional prefix DO-ALL or if `apropos-do-all' is non-nil, also show |
05942d06 RS |
358 | normal variables." |
359 | (interactive (list (read-string | |
360 | (concat "Apropos " | |
361 | (if (or current-prefix-arg apropos-do-all) | |
362 | "variable" | |
363 | "user option") | |
7dbffb1c | 364 | " (regexp or words): ")) |
05942d06 RS |
365 | current-prefix-arg)) |
366 | (apropos-command regexp nil | |
cd00fd36 | 367 | (if (or do-all apropos-do-all) |
05942d06 RS |
368 | #'(lambda (symbol) |
369 | (and (boundp symbol) | |
370 | (get symbol 'variable-documentation))) | |
371 | 'user-variable-p))) | |
26a4a227 | 372 | |
645c4f6a KH |
373 | ;; For auld lang syne: |
374 | ;;;###autoload | |
82e736c1 | 375 | (defalias 'command-apropos 'apropos-command) |
6f8e447f | 376 | ;;;###autoload |
05942d06 | 377 | (defun apropos-command (apropos-regexp &optional do-all var-predicate) |
7a5348db DL |
378 | "Show commands (interactively callable functions) that match APROPOS-REGEXP. |
379 | With optional prefix DO-ALL, or if `apropos-do-all' is non-nil, also show | |
9a909b3c | 380 | noninteractive functions. |
05942d06 | 381 | |
9a909b3c | 382 | If VAR-PREDICATE is non-nil, show only variables, and only those that |
05942d06 | 383 | satisfy the predicate VAR-PREDICATE." |
f38fd610 RS |
384 | (interactive (list (read-string (concat |
385 | "Apropos command " | |
386 | (if (or current-prefix-arg | |
387 | apropos-do-all) | |
9a909b3c | 388 | "or function ") |
7dbffb1c | 389 | "(regexp or words): ")) |
645c4f6a | 390 | current-prefix-arg)) |
7dbffb1c | 391 | (setq apropos-regexp (apropos-rewrite-regexp apropos-regexp)) |
3925e76d | 392 | (let ((message |
26a4a227 | 393 | (let ((standard-output (get-buffer-create "*Apropos*"))) |
3925e76d | 394 | (print-help-return-message 'identity)))) |
645c4f6a KH |
395 | (or do-all (setq do-all apropos-do-all)) |
396 | (setq apropos-accumulator | |
397 | (apropos-internal apropos-regexp | |
cd00fd36 KH |
398 | (or var-predicate |
399 | (if do-all 'functionp 'commandp)))) | |
dea22c45 RS |
400 | (let ((tem apropos-accumulator)) |
401 | (while tem | |
d2b30292 KS |
402 | (if (or (get (car tem) 'apropos-inhibit) |
403 | (apropos-false-hit-symbol (car tem))) | |
dea22c45 RS |
404 | (setq apropos-accumulator (delq (car tem) apropos-accumulator))) |
405 | (setq tem (cdr tem)))) | |
a9155e87 | 406 | (let ((p apropos-accumulator) |
7dbffb1c | 407 | doc symbol score) |
a9155e87 KH |
408 | (while p |
409 | (setcar p (list | |
410 | (setq symbol (car p)) | |
7dbffb1c | 411 | (setq score (apropos-score-symbol symbol)) |
a9155e87 KH |
412 | (unless var-predicate |
413 | (if (functionp symbol) | |
414 | (if (setq doc (documentation symbol t)) | |
7dbffb1c KS |
415 | (progn |
416 | (setq score (+ score (apropos-score-doc doc))) | |
417 | (substring doc 0 (string-match "\n" doc))) | |
a9155e87 KH |
418 | "(not documented)"))) |
419 | (and var-predicate | |
420 | (funcall var-predicate symbol) | |
421 | (if (setq doc (documentation-property | |
422 | symbol 'variable-documentation t)) | |
7dbffb1c KS |
423 | (progn |
424 | (setq score (+ score (apropos-score-doc doc))) | |
425 | (substring doc 0 | |
426 | (string-match "\n" doc))))))) | |
427 | (setcar (cdr (car p)) score) | |
a9155e87 KH |
428 | (setq p (cdr p)))) |
429 | (and (apropos-print t nil) | |
430 | message | |
431 | (message message)))) | |
3925e76d KH |
432 | |
433 | ||
3925e76d | 434 | ;;;###autoload |
914b40da RS |
435 | (defun apropos-documentation-property (symbol property raw) |
436 | "Like (documentation-property SYMBOL PROPERTY RAW) but handle errors." | |
437 | (condition-case () | |
438 | (let ((doc (documentation-property symbol property raw))) | |
439 | (if doc (substring doc 0 (string-match "\n" doc)) | |
440 | "(not documented)")) | |
441 | (error "(error retrieving documentation)"))) | |
442 | ||
645c4f6a | 443 | (defun apropos (apropos-regexp &optional do-all) |
7a5348db DL |
444 | "Show all bound symbols whose names match APROPOS-REGEXP. |
445 | With optional prefix DO-ALL or if `apropos-do-all' is non-nil, also | |
446 | show unbound symbols and key bindings, which is a little more | |
447 | time-consuming. Returns list of symbols and documentation found." | |
7dbffb1c KS |
448 | (interactive "sApropos symbol (regexp or words): \nP") |
449 | (setq apropos-regexp (apropos-rewrite-regexp apropos-regexp)) | |
645c4f6a KH |
450 | (setq apropos-accumulator |
451 | (apropos-internal apropos-regexp | |
452 | (and (not do-all) | |
453 | (not apropos-do-all) | |
454 | (lambda (symbol) | |
455 | (or (fboundp symbol) | |
456 | (boundp symbol) | |
5edc67d3 | 457 | (facep symbol) |
645c4f6a | 458 | (symbol-plist symbol)))))) |
dea22c45 RS |
459 | (let ((tem apropos-accumulator)) |
460 | (while tem | |
461 | (if (get (car tem) 'apropos-inhibit) | |
462 | (setq apropos-accumulator (delq (car tem) apropos-accumulator))) | |
463 | (setq tem (cdr tem)))) | |
a9155e87 KH |
464 | (let ((p apropos-accumulator) |
465 | symbol doc properties) | |
466 | (while p | |
467 | (setcar p (list | |
468 | (setq symbol (car p)) | |
7dbffb1c | 469 | 0 |
a9155e87 KH |
470 | (when (fboundp symbol) |
471 | (if (setq doc (condition-case nil | |
472 | (documentation symbol t) | |
473 | (void-function | |
914b40da RS |
474 | "(alias for undefined function)") |
475 | (error | |
476 | "(error retrieving function documentation"))) | |
a9155e87 KH |
477 | (substring doc 0 (string-match "\n" doc)) |
478 | "(not documented)")) | |
479 | (when (boundp symbol) | |
914b40da RS |
480 | (apropos-documentation-property |
481 | symbol 'variable-documentation t)) | |
a9155e87 KH |
482 | (when (setq properties (symbol-plist symbol)) |
483 | (setq doc (list (car properties))) | |
484 | (while (setq properties (cdr (cdr properties))) | |
485 | (setq doc (cons (car properties) doc))) | |
486 | (mapconcat #'symbol-name (nreverse doc) " ")) | |
487 | (when (get symbol 'widget-type) | |
914b40da RS |
488 | (apropos-documentation-property |
489 | symbol 'widget-documentation t)) | |
a9155e87 | 490 | (when (facep symbol) |
914b40da RS |
491 | (apropos-documentation-property |
492 | symbol 'face-documentation t)) | |
a9155e87 | 493 | (when (get symbol 'custom-group) |
914b40da RS |
494 | (apropos-documentation-property |
495 | symbol 'group-documentation t)))) | |
a9155e87 | 496 | (setq p (cdr p)))) |
3925e76d | 497 | (apropos-print |
645c4f6a | 498 | (or do-all apropos-do-all) |
3925e76d KH |
499 | nil)) |
500 | ||
501 | ||
6f8e447f | 502 | ;;;###autoload |
645c4f6a | 503 | (defun apropos-value (apropos-regexp &optional do-all) |
7a5348db DL |
504 | "Show all symbols whose value's printed image matches APROPOS-REGEXP. |
505 | With optional prefix DO-ALL or if `apropos-do-all' is non-nil, also looks | |
3925e76d | 506 | at the function and at the names and values of properties. |
645c4f6a | 507 | Returns list of symbols and values found." |
7dbffb1c KS |
508 | (interactive "sApropos value (regexp or words): \nP") |
509 | (setq apropos-regexp (apropos-rewrite-regexp apropos-regexp)) | |
645c4f6a KH |
510 | (or do-all (setq do-all apropos-do-all)) |
511 | (setq apropos-accumulator ()) | |
512 | (let (f v p) | |
3925e76d KH |
513 | (mapatoms |
514 | (lambda (symbol) | |
515 | (setq f nil v nil p nil) | |
7dbffb1c KS |
516 | (or (memq symbol '(apropos-regexp |
517 | apropos-orig-regexp apropos-all-regexp | |
518 | apropos-words apropos-all-words | |
519 | do-all apropos-accumulator | |
520 | symbol f v p)) | |
645c4f6a | 521 | (setq v (apropos-value-internal 'boundp symbol 'symbol-value))) |
3925e76d | 522 | (if do-all |
645c4f6a KH |
523 | (setq f (apropos-value-internal 'fboundp symbol 'symbol-function) |
524 | p (apropos-format-plist symbol "\n " t))) | |
d2b30292 KS |
525 | (if (apropos-false-hit-str v) |
526 | (setq v nil)) | |
527 | (if (apropos-false-hit-str f) | |
528 | (setq f nil)) | |
529 | (if (apropos-false-hit-str p) | |
530 | (setq p nil)) | |
3925e76d | 531 | (if (or f v p) |
7dbffb1c KS |
532 | (setq apropos-accumulator (cons (list symbol |
533 | (+ (apropos-score-str f) | |
534 | (apropos-score-str v) | |
535 | (apropos-score-str p)) | |
536 | f v p) | |
645c4f6a | 537 | apropos-accumulator)))))) |
9cc84e31 | 538 | (apropos-print nil "\n----------------\n")) |
3925e76d KH |
539 | |
540 | ||
645c4f6a KH |
541 | ;;;###autoload |
542 | (defun apropos-documentation (apropos-regexp &optional do-all) | |
7a5348db DL |
543 | "Show symbols whose documentation contain matches for APROPOS-REGEXP. |
544 | With optional prefix DO-ALL or if `apropos-do-all' is non-nil, also use | |
645c4f6a KH |
545 | documentation that is not stored in the documentation file and show key |
546 | bindings. | |
547 | Returns list of symbols and documentation found." | |
7dbffb1c KS |
548 | (interactive "sApropos documentation (regexp or words): \nP") |
549 | (setq apropos-regexp (apropos-rewrite-regexp apropos-regexp)) | |
645c4f6a KH |
550 | (or do-all (setq do-all apropos-do-all)) |
551 | (setq apropos-accumulator () apropos-files-scanned ()) | |
552 | (let ((standard-input (get-buffer-create " apropos-temp")) | |
7dbffb1c | 553 | f v sf sv) |
645c4f6a KH |
554 | (unwind-protect |
555 | (save-excursion | |
556 | (set-buffer standard-input) | |
557 | (apropos-documentation-check-doc-file) | |
558 | (if do-all | |
559 | (mapatoms | |
560 | (lambda (symbol) | |
561 | (setq f (apropos-safe-documentation symbol) | |
26a4a227 KH |
562 | v (get symbol 'variable-documentation)) |
563 | (if (integerp v) (setq v)) | |
564 | (setq f (apropos-documentation-internal f) | |
565 | v (apropos-documentation-internal v)) | |
7dbffb1c KS |
566 | (setq sf (apropos-score-doc f) |
567 | sv (apropos-score-doc v)) | |
645c4f6a KH |
568 | (if (or f v) |
569 | (if (setq apropos-item | |
570 | (cdr (assq symbol apropos-accumulator))) | |
571 | (progn | |
572 | (if f | |
7dbffb1c KS |
573 | (progn |
574 | (setcar (nthcdr 1 apropos-item) f) | |
575 | (setcar apropos-item (+ (car apropos-item) sf)))) | |
645c4f6a | 576 | (if v |
7dbffb1c KS |
577 | (progn |
578 | (setcar (nthcdr 2 apropos-item) v) | |
579 | (setcar apropos-item (+ (car apropos-item) sv))))) | |
645c4f6a | 580 | (setq apropos-accumulator |
7dbffb1c KS |
581 | (cons (list symbol |
582 | (+ (apropos-score-symbol symbol 2) sf sv) | |
583 | f v) | |
645c4f6a | 584 | apropos-accumulator))))))) |
9cc84e31 | 585 | (apropos-print nil "\n----------------\n")) |
645c4f6a KH |
586 | (kill-buffer standard-input)))) |
587 | ||
588 | \f | |
589 | (defun apropos-value-internal (predicate symbol function) | |
590 | (if (funcall predicate symbol) | |
591 | (progn | |
592 | (setq symbol (prin1-to-string (funcall function symbol))) | |
593 | (if (string-match apropos-regexp symbol) | |
594 | (progn | |
595 | (if apropos-match-face | |
596 | (put-text-property (match-beginning 0) (match-end 0) | |
597 | 'face apropos-match-face | |
598 | symbol)) | |
599 | symbol))))) | |
600 | ||
601 | (defun apropos-documentation-internal (doc) | |
602 | (if (consp doc) | |
603 | (apropos-documentation-check-elc-file (car doc)) | |
604 | (and doc | |
7dbffb1c | 605 | (string-match apropos-all-regexp doc) |
d2b30292 | 606 | (save-match-data (apropos-true-hit-doc doc)) |
645c4f6a KH |
607 | (progn |
608 | (if apropos-match-face | |
609 | (put-text-property (match-beginning 0) | |
610 | (match-end 0) | |
611 | 'face apropos-match-face | |
612 | (setq doc (copy-sequence doc)))) | |
613 | doc)))) | |
614 | ||
615 | (defun apropos-format-plist (pl sep &optional compare) | |
3925e76d KH |
616 | (setq pl (symbol-plist pl)) |
617 | (let (p p-out) | |
618 | (while pl | |
619 | (setq p (format "%s %S" (car pl) (nth 1 pl))) | |
645c4f6a KH |
620 | (if (or (not compare) (string-match apropos-regexp p)) |
621 | (if apropos-property-face | |
3925e76d | 622 | (put-text-property 0 (length (symbol-name (car pl))) |
645c4f6a | 623 | 'face apropos-property-face p)) |
3925e76d | 624 | (setq p nil)) |
645c4f6a KH |
625 | (if p |
626 | (progn | |
627 | (and compare apropos-match-face | |
628 | (put-text-property (match-beginning 0) (match-end 0) | |
629 | 'face apropos-match-face | |
630 | p)) | |
631 | (setq p-out (concat p-out (if p-out sep) p)))) | |
3925e76d KH |
632 | (setq pl (nthcdr 2 pl))) |
633 | p-out)) | |
634 | ||
6f8e447f | 635 | |
645c4f6a | 636 | ;; Finds all documentation related to APROPOS-REGEXP in internal-doc-file-name. |
3925e76d | 637 | |
645c4f6a | 638 | (defun apropos-documentation-check-doc-file () |
26a4a227 KH |
639 | (let (type symbol (sepa 2) sepb beg end) |
640 | (insert ?\^_) | |
641 | (backward-char) | |
645c4f6a | 642 | (insert-file-contents (concat doc-directory internal-doc-file-name)) |
26a4a227 KH |
643 | (forward-char) |
644 | (while (save-excursion | |
645 | (setq sepb (search-forward "\^_")) | |
646 | (not (eobp))) | |
647 | (beginning-of-line 2) | |
648 | (if (save-restriction | |
649 | (narrow-to-region (point) (1- sepb)) | |
7dbffb1c | 650 | (re-search-forward apropos-all-regexp nil t)) |
26a4a227 KH |
651 | (progn |
652 | (setq beg (match-beginning 0) | |
653 | end (point)) | |
654 | (goto-char (1+ sepa)) | |
d2b30292 KS |
655 | (setq type (if (eq ?F (preceding-char)) |
656 | 2 ; function documentation | |
657 | 3) ; variable documentation | |
658 | symbol (read) | |
659 | beg (- beg (point) 1) | |
660 | end (- end (point) 1) | |
661 | doc (buffer-substring (1+ (point)) (1- sepb))) | |
662 | (when (apropos-true-hit-doc doc) | |
663 | (or (and (setq apropos-item (assq symbol apropos-accumulator)) | |
664 | (setcar (cdr apropos-item) | |
665 | (+ (cadr apropos-item) (apropos-score-doc doc)))) | |
666 | (setq apropos-item (list symbol | |
667 | (+ (apropos-score-symbol symbol 2) | |
668 | (apropos-score-doc doc)) | |
669 | nil nil) | |
670 | apropos-accumulator (cons apropos-item | |
671 | apropos-accumulator))) | |
672 | (if apropos-match-face | |
673 | (put-text-property beg end 'face apropos-match-face doc)) | |
674 | (setcar (nthcdr type apropos-item) doc)))) | |
26a4a227 | 675 | (setq sepa (goto-char sepb))))) |
645c4f6a KH |
676 | |
677 | (defun apropos-documentation-check-elc-file (file) | |
678 | (if (member file apropos-files-scanned) | |
679 | nil | |
26a4a227 | 680 | (let (symbol doc beg end this-is-a-variable) |
645c4f6a KH |
681 | (setq apropos-files-scanned (cons file apropos-files-scanned)) |
682 | (erase-buffer) | |
683 | (insert-file-contents file) | |
684 | (while (search-forward "\n#@" nil t) | |
685 | ;; Read the comment length, and advance over it. | |
686 | (setq end (read) | |
26a4a227 KH |
687 | beg (1+ (point)) |
688 | end (+ (point) end -1)) | |
689 | (forward-char) | |
690 | (if (save-restriction | |
691 | ;; match ^ and $ relative to doc string | |
692 | (narrow-to-region beg end) | |
7dbffb1c | 693 | (re-search-forward apropos-all-regexp nil t)) |
645c4f6a | 694 | (progn |
26a4a227 KH |
695 | (goto-char (+ end 2)) |
696 | (setq doc (buffer-substring beg end) | |
697 | end (- (match-end 0) beg) | |
d2b30292 KS |
698 | beg (- (match-beginning 0) beg)) |
699 | (when (apropos-true-hit-doc doc) | |
700 | (setq this-is-a-variable (looking-at "(def\\(var\\|const\\) ") | |
701 | symbol (progn | |
702 | (skip-chars-forward "(a-z") | |
703 | (forward-char) | |
704 | (read)) | |
705 | symbol (if (consp symbol) | |
706 | (nth 1 symbol) | |
707 | symbol)) | |
708 | (if (if this-is-a-variable | |
709 | (get symbol 'variable-documentation) | |
710 | (and (fboundp symbol) (apropos-safe-documentation symbol))) | |
711 | (progn | |
712 | (or (and (setq apropos-item (assq symbol apropos-accumulator)) | |
713 | (setcar (cdr apropos-item) | |
714 | (+ (cadr apropos-item) (apropos-score-doc doc)))) | |
715 | (setq apropos-item (list symbol | |
716 | (+ (apropos-score-symbol symbol 2) | |
717 | (apropos-score-doc doc)) | |
718 | nil nil) | |
719 | apropos-accumulator (cons apropos-item | |
720 | apropos-accumulator))) | |
721 | (if apropos-match-face | |
722 | (put-text-property beg end 'face apropos-match-face | |
723 | doc)) | |
724 | (setcar (nthcdr (if this-is-a-variable 3 2) | |
725 | apropos-item) | |
726 | doc)))))))))) | |
645c4f6a KH |
727 | |
728 | ||
729 | ||
730 | (defun apropos-safe-documentation (function) | |
7a5348db | 731 | "Like `documentation', except it avoids calling `get_doc_string'. |
6f8e447f | 732 | Will return nil instead." |
3925e76d | 733 | (while (and function (symbolp function)) |
6f8e447f | 734 | (setq function (if (fboundp function) |
3925e76d | 735 | (symbol-function function)))) |
d2e1218f RS |
736 | (if (eq (car-safe function) 'macro) |
737 | (setq function (cdr function))) | |
3925e76d | 738 | (setq function (if (byte-code-function-p function) |
645c4f6a KH |
739 | (if (> (length function) 4) |
740 | (aref function 4)) | |
741 | (if (eq (car-safe function) 'autoload) | |
742 | (nth 2 function) | |
743 | (if (eq (car-safe function) 'lambda) | |
744 | (if (stringp (nth 2 function)) | |
745 | (nth 2 function) | |
746 | (if (stringp (nth 3 function)) | |
747 | (nth 3 function))))))) | |
748 | (if (integerp function) | |
749 | nil | |
750 | function)) | |
751 | ||
752 | ||
a9155e87 KH |
753 | (defun apropos-print (do-keys spacing) |
754 | "Output result of apropos searching into buffer `*Apropos*'. | |
755 | The value of `apropos-accumulator' is the list of items to output. | |
7dbffb1c KS |
756 | Each element should have the format |
757 | (SYMBOL SCORE FN-DOC VAR-DOC [PLIST-DOC WIDGET-DOC FACE-DOC GROUP-DOC]). | |
a9155e87 KH |
758 | The return value is the list that was in `apropos-accumulator', sorted |
759 | alphabetically by symbol name; but this function also sets | |
9cc84e31 RS |
760 | `apropos-accumulator' to nil before returning. |
761 | ||
762 | If SPACING is non-nil, it should be a string; | |
763 | separate items with that string." | |
645c4f6a | 764 | (if (null apropos-accumulator) |
7dbffb1c | 765 | (message "No apropos matches for `%s'" apropos-orig-regexp) |
645c4f6a KH |
766 | (setq apropos-accumulator |
767 | (sort apropos-accumulator (lambda (a b) | |
7dbffb1c KS |
768 | (or (> (cadr a) (cadr b)) |
769 | (and (= (cadr a) (cadr b)) | |
770 | (string-lessp (car a) (car b))))))) | |
09e32aaf | 771 | (with-output-to-temp-buffer "*Apropos*" |
645c4f6a | 772 | (let ((p apropos-accumulator) |
3925e76d | 773 | (old-buffer (current-buffer)) |
e517f56d | 774 | symbol item) |
26a4a227 KH |
775 | (set-buffer standard-output) |
776 | (apropos-mode) | |
a2ee7919 | 777 | (if (display-mouse-p) |
8d33699b EZ |
778 | (insert |
779 | "If moving the mouse over text changes the text's color, " | |
780 | "you can click\n" | |
781 | "mouse-2 (second button from right) on that text to " | |
782 | "get more information.\n")) | |
53a7d078 | 783 | (insert "In this buffer, go to the name of the command, or function," |
d94d5b5a EZ |
784 | " or variable,\n" |
785 | (substitute-command-keys | |
786 | "and type \\[apropos-follow] to get full documentation.\n\n")) | |
26a4a227 | 787 | (while (consp p) |
9cc84e31 RS |
788 | (when (and spacing (not (bobp))) |
789 | (princ spacing)) | |
26a4a227 KH |
790 | (setq apropos-item (car p) |
791 | symbol (car apropos-item) | |
e517f56d MB |
792 | p (cdr p)) |
793 | (insert-text-button (symbol-name symbol) | |
794 | 'type 'apropos-symbol | |
795 | ;; Can't use default, since user may have | |
796 | ;; changed the variable! | |
797 | ;; Just say `no' to variables containing faces! | |
798 | 'face apropos-symbol-face) | |
7dbffb1c KS |
799 | (if apropos-show-scores |
800 | (insert " (" (number-to-string (cadr apropos-item)) ") ")) | |
98ce2330 | 801 | ;; Calculate key-bindings if we want them. |
26a4a227 KH |
802 | (and do-keys |
803 | (commandp symbol) | |
804 | (indent-to 30 1) | |
98ce2330 RS |
805 | (if (let ((keys |
806 | (save-excursion | |
807 | (set-buffer old-buffer) | |
808 | (where-is-internal symbol))) | |
809 | filtered) | |
810 | ;; Copy over the list of key sequences, | |
811 | ;; omitting any that contain a buffer or a frame. | |
812 | (while keys | |
813 | (let ((key (car keys)) | |
814 | (i 0) | |
815 | loser) | |
816 | (while (< i (length key)) | |
817 | (if (or (framep (aref key i)) | |
818 | (bufferp (aref key i))) | |
819 | (setq loser t)) | |
820 | (setq i (1+ i))) | |
821 | (or loser | |
822 | (setq filtered (cons key filtered)))) | |
823 | (setq keys (cdr keys))) | |
824 | (setq item filtered)) | |
825 | ;; Convert the remaining keys to a string and insert. | |
826 | (insert | |
26a4a227 | 827 | (mapconcat |
98ce2330 | 828 | (lambda (key) |
7a5348db | 829 | (setq key (condition-case () |
c3d0fe18 KH |
830 | (key-description key) |
831 | (error))) | |
98ce2330 | 832 | (if apropos-keybinding-face |
26a4a227 KH |
833 | (put-text-property 0 (length key) |
834 | 'face apropos-keybinding-face | |
98ce2330 RS |
835 | key)) |
836 | key) | |
837 | item ", ")) | |
82fbaa5e RS |
838 | (insert "M-x") |
839 | (put-text-property (- (point) 3) (point) | |
840 | 'face apropos-keybinding-face) | |
841 | (insert " " (symbol-name symbol) " ") | |
842 | (insert "RET") | |
843 | (put-text-property (- (point) 3) (point) | |
844 | 'face apropos-keybinding-face))) | |
26a4a227 | 845 | (terpri) |
7dbffb1c | 846 | (apropos-print-doc 2 |
26a4a227 | 847 | (if (commandp symbol) |
894e460c | 848 | 'apropos-command |
26a4a227 | 849 | (if (apropos-macrop symbol) |
894e460c MB |
850 | 'apropos-macro |
851 | 'apropos-function)) | |
8d7f1de3 | 852 | t) |
7dbffb1c KS |
853 | (apropos-print-doc 3 'apropos-variable t) |
854 | (apropos-print-doc 7 'apropos-group t) | |
855 | (apropos-print-doc 6 'apropos-face t) | |
856 | (apropos-print-doc 5 'apropos-widget t) | |
857 | (apropos-print-doc 4 'apropos-plist nil)) | |
a9155e87 | 858 | (setq buffer-read-only t)))) |
645c4f6a KH |
859 | (prog1 apropos-accumulator |
860 | (setq apropos-accumulator ()))) ; permit gc | |
861 | ||
3925e76d | 862 | |
645c4f6a KH |
863 | (defun apropos-macrop (symbol) |
864 | "T if SYMBOL is a Lisp macro." | |
865 | (and (fboundp symbol) | |
866 | (consp (setq symbol | |
867 | (symbol-function symbol))) | |
868 | (or (eq (car symbol) 'macro) | |
869 | (if (eq (car symbol) 'autoload) | |
870 | (memq (nth 4 symbol) | |
871 | '(macro t)))))) | |
3925e76d | 872 | |
645c4f6a | 873 | |
894e460c | 874 | (defun apropos-print-doc (i type do-keys) |
645c4f6a | 875 | (if (stringp (setq i (nth i apropos-item))) |
3925e76d KH |
876 | (progn |
877 | (insert " ") | |
894e460c MB |
878 | (insert-text-button (button-type-get type 'apropos-label) |
879 | 'type type | |
e517f56d MB |
880 | ;; Can't use the default button face, since |
881 | ;; user may have changed the variable! | |
882 | ;; Just say `no' to variables containing faces! | |
883 | 'face apropos-label-face | |
894e460c | 884 | 'apropos-symbol (car apropos-item)) |
e517f56d | 885 | (insert ": ") |
645c4f6a KH |
886 | (insert (if do-keys (substitute-command-keys i) i)) |
887 | (or (bolp) (terpri))))) | |
3925e76d KH |
888 | |
889 | ||
e517f56d MB |
890 | (defun apropos-follow () |
891 | "Invokes any button at point, otherwise invokes the nearest label button." | |
3925e76d | 892 | (interactive) |
e517f56d MB |
893 | (button-activate |
894 | (or (apropos-next-label-button (line-beginning-position)) | |
895 | (error "There is nothing to follow here")))) | |
3925e76d KH |
896 | |
897 | ||
898 | (defun apropos-describe-plist (symbol) | |
899 | "Display a pretty listing of SYMBOL's plist." | |
900 | (with-output-to-temp-buffer "*Help*" | |
901 | (set-buffer standard-output) | |
902 | (princ "Symbol ") | |
903 | (prin1 symbol) | |
904 | (princ "'s plist is\n (") | |
645c4f6a KH |
905 | (if apropos-symbol-face |
906 | (put-text-property 8 (- (point) 14) 'face apropos-symbol-face)) | |
3925e76d | 907 | (insert (apropos-format-plist symbol "\n ")) |
26a4a227 KH |
908 | (princ ")") |
909 | (print-help-return-message))) | |
6f8e447f | 910 | |
e517f56d | 911 | |
896546cd RS |
912 | (provide 'apropos) |
913 | ||
c0274f38 | 914 | ;;; apropos.el ends here |