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3925e76d | 1 | ;;; apropos.el --- apropos commands for users and programmers. |
c0274f38 | 2 | |
3925e76d | 3 | ;; Copyright (C) 1989, 1994, 1995 Free Software Foundation, Inc. |
9750e079 | 4 | |
e5167999 | 5 | ;; Author: Joe Wells <jbw@bigbird.bu.edu> |
3925e76d | 6 | ;; Rewritten: Daniel.Pfeiffer@Informatik.START.dbp.de, fax (+49 69) 7588-2389 |
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 | ||
ddd2f740 RS |
60 | (defgroup apropos nil |
61 | "Apropos commands for users and programmers" | |
62 | :group 'Help | |
63 | :prefix "apropos") | |
64 | ||
3925e76d | 65 | ;; I see a degradation of maybe 10-20% only. |
ddd2f740 | 66 | (defcustom apropos-do-all nil |
3925e76d | 67 | "*Whether the apropos commands should do more. |
ddd2f740 RS |
68 | |
69 | Slows them down more or less. Set this non-nil if you have a fast machine." | |
70 | :group 'apropos | |
71 | :type 'boolean) | |
3925e76d KH |
72 | |
73 | ||
ddd2f740 RS |
74 | (defcustom apropos-symbol-face (if window-system 'bold) |
75 | "*Face for symbol name in apropos output or `nil'. | |
76 | This looks good, but slows down the commands several times." | |
77 | :group 'apropos | |
78 | :type 'face) | |
645c4f6a | 79 | |
ddd2f740 | 80 | (defcustom apropos-keybinding-face (if window-system 'underline) |
645c4f6a | 81 | "*Face for keybinding display in apropos output or `nil'. |
ddd2f740 RS |
82 | This looks good, but slows down the commands several times." |
83 | :group 'apropos | |
84 | :type 'face) | |
645c4f6a | 85 | |
ddd2f740 | 86 | (defcustom apropos-label-face (if window-system 'italic) |
645c4f6a KH |
87 | "*Face for label (Command, Variable ...) in apropos output or `nil'. |
88 | If this is `nil' no mouse highlighting occurs. | |
89 | This looks good, but slows down the commands several times. | |
90 | When this is a face name, as it is initially, it gets transformed to a | |
ddd2f740 RS |
91 | text-property list for efficiency." |
92 | :group 'apropos | |
93 | :type 'face) | |
645c4f6a | 94 | |
ddd2f740 | 95 | (defcustom apropos-property-face (if window-system 'bold-italic) |
645c4f6a | 96 | "*Face for property name in apropos output or `nil'. |
ddd2f740 RS |
97 | This looks good, but slows down the commands several times." |
98 | :group 'apropos | |
99 | :type 'face) | |
645c4f6a | 100 | |
ddd2f740 | 101 | (defcustom apropos-match-face (if window-system 'secondary-selection) |
645c4f6a | 102 | "*Face for matching part in apropos-documentation/value output or `nil'. |
ddd2f740 RS |
103 | This looks good, but slows down the commands several times." |
104 | :group 'apropos | |
105 | :type 'face) | |
3925e76d | 106 | |
6f8e447f | 107 | |
26a4a227 | 108 | (defvar apropos-mode-map |
3925e76d KH |
109 | (let ((map (make-sparse-keymap))) |
110 | (define-key map "\C-m" 'apropos-follow) | |
685b1bef RS |
111 | (define-key map " " 'scroll-up) |
112 | (define-key map "\177" 'scroll-down) | |
3925e76d KH |
113 | (define-key map [mouse-2] 'apropos-mouse-follow) |
114 | (define-key map [down-mouse-2] nil) | |
115 | map) | |
26a4a227 | 116 | "Keymap used in Apropos mode.") |
4de5599d | 117 | |
3925e76d | 118 | |
645c4f6a KH |
119 | (defvar apropos-regexp nil |
120 | "Regexp used in current apropos run.") | |
121 | ||
122 | (defvar apropos-files-scanned () | |
1259a080 | 123 | "List of elc files already scanned in current run of `apropos-documentation'.") |
645c4f6a KH |
124 | |
125 | (defvar apropos-accumulator () | |
126 | "Alist of symbols already found in current apropos run.") | |
3925e76d | 127 | |
645c4f6a KH |
128 | (defvar apropos-item () |
129 | "Current item in or for apropos-accumulator.") | |
130 | \f | |
26a4a227 KH |
131 | (defun apropos-mode () |
132 | "Major mode for following hyperlinks in output of apropos commands. | |
133 | ||
134 | \\{apropos-mode-map}" | |
135 | (interactive) | |
136 | (kill-all-local-variables) | |
137 | (use-local-map apropos-mode-map) | |
138 | (setq major-mode 'apropos-mode | |
139 | mode-name "Apropos")) | |
140 | ||
141 | ||
645c4f6a KH |
142 | ;; For auld lang syne: |
143 | ;;;###autoload | |
144 | (fset 'command-apropos 'apropos-command) | |
6f8e447f | 145 | ;;;###autoload |
645c4f6a | 146 | (defun apropos-command (apropos-regexp &optional do-all) |
3925e76d KH |
147 | "Shows commands (interactively callable functions) that match REGEXP. |
148 | With optional prefix ARG or if `apropos-do-all' is non-nil, also show | |
149 | variables." | |
150 | (interactive (list (read-string (concat "Apropos command " | |
151 | (if (or current-prefix-arg | |
645c4f6a | 152 | apropos-do-all) |
3925e76d KH |
153 | "or variable ") |
154 | "(regexp): ")) | |
645c4f6a | 155 | current-prefix-arg)) |
3925e76d | 156 | (let ((message |
26a4a227 | 157 | (let ((standard-output (get-buffer-create "*Apropos*"))) |
3925e76d | 158 | (print-help-return-message 'identity)))) |
645c4f6a KH |
159 | (or do-all (setq do-all apropos-do-all)) |
160 | (setq apropos-accumulator | |
161 | (apropos-internal apropos-regexp | |
162 | (if do-all | |
163 | (lambda (symbol) (or (commandp symbol) | |
164 | (user-variable-p symbol))) | |
165 | 'commandp))) | |
3925e76d | 166 | (if (apropos-print |
3925e76d KH |
167 | t |
168 | (lambda (p) | |
169 | (let (doc symbol) | |
170 | (while p | |
171 | (setcar p (list | |
172 | (setq symbol (car p)) | |
173 | (if (commandp symbol) | |
174 | (if (setq doc (documentation symbol t)) | |
175 | (substring doc 0 (string-match "\n" doc)) | |
176 | "(not documented)")) | |
177 | (and do-all | |
178 | (user-variable-p symbol) | |
179 | (if (setq doc (documentation-property | |
180 | symbol 'variable-documentation t)) | |
181 | (substring doc 0 | |
182 | (string-match "\n" doc)))))) | |
183 | (setq p (cdr p))))) | |
184 | nil) | |
185 | (and message (message message))))) | |
186 | ||
187 | ||
3925e76d | 188 | ;;;###autoload |
645c4f6a KH |
189 | (defun apropos (apropos-regexp &optional do-all) |
190 | "Show all bound symbols whose names match REGEXP. | |
191 | With optional prefix ARG or if `apropos-do-all' is non-nil, also show unbound | |
192 | symbols and key bindings, which is a little more time-consuming. | |
6f8e447f | 193 | Returns list of symbols and documentation found." |
3925e76d | 194 | (interactive "sApropos symbol (regexp): \nP") |
645c4f6a KH |
195 | (setq apropos-accumulator |
196 | (apropos-internal apropos-regexp | |
197 | (and (not do-all) | |
198 | (not apropos-do-all) | |
199 | (lambda (symbol) | |
200 | (or (fboundp symbol) | |
201 | (boundp symbol) | |
5edc67d3 | 202 | (facep symbol) |
645c4f6a | 203 | (symbol-plist symbol)))))) |
3925e76d | 204 | (apropos-print |
645c4f6a | 205 | (or do-all apropos-do-all) |
3925e76d | 206 | (lambda (p) |
d69e3b68 | 207 | (let (symbol doc properties) |
3925e76d KH |
208 | (while p |
209 | (setcar p (list | |
210 | (setq symbol (car p)) | |
d69e3b68 KH |
211 | (when (fboundp symbol) |
212 | (if (setq doc (documentation symbol t)) | |
213 | (substring doc 0 (string-match "\n" doc)) | |
214 | "(not documented)")) | |
215 | (when (boundp symbol) | |
216 | (if (setq doc (documentation-property | |
217 | symbol 'variable-documentation t)) | |
218 | (substring doc 0 (string-match "\n" doc)) | |
219 | "(not documented)")) | |
220 | (when (setq properties (symbol-plist symbol)) | |
221 | (setq doc (list (car properties))) | |
222 | (while (setq properties (cdr (cdr properties))) | |
223 | (setq doc (cons (car properties) doc))) | |
5edc67d3 RS |
224 | (mapconcat #'symbol-name (nreverse doc) " ")) |
225 | (when (get symbol 'widget-type) | |
226 | (if (setq doc (documentation-property | |
227 | symbol 'widget-documentation t)) | |
228 | (substring doc 0 | |
229 | (string-match "\n" doc)) | |
230 | "(not documented)")) | |
231 | (when (facep symbol) | |
232 | (if (setq doc (documentation-property | |
233 | symbol 'face-documentation t)) | |
234 | (substring doc 0 | |
235 | (string-match "\n" doc)) | |
2be7e3fa RS |
236 | "(not documented)")) |
237 | (when (get symbol 'custom-group) | |
238 | (if (setq doc (documentation-property | |
239 | symbol 'group-documentation t)) | |
240 | (substring doc 0 | |
241 | (string-match "\n" doc)) | |
5edc67d3 | 242 | "(not documented)")))) |
3925e76d KH |
243 | (setq p (cdr p))))) |
244 | nil)) | |
245 | ||
246 | ||
6f8e447f | 247 | ;;;###autoload |
645c4f6a | 248 | (defun apropos-value (apropos-regexp &optional do-all) |
3925e76d KH |
249 | "Show all symbols whose value's printed image matches REGEXP. |
250 | With optional prefix ARG or if `apropos-do-all' is non-nil, also looks | |
251 | at the function and at the names and values of properties. | |
645c4f6a | 252 | Returns list of symbols and values found." |
3925e76d | 253 | (interactive "sApropos value (regexp): \nP") |
645c4f6a KH |
254 | (or do-all (setq do-all apropos-do-all)) |
255 | (setq apropos-accumulator ()) | |
256 | (let (f v p) | |
3925e76d KH |
257 | (mapatoms |
258 | (lambda (symbol) | |
259 | (setq f nil v nil p nil) | |
645c4f6a KH |
260 | (or (memq symbol '(apropos-regexp do-all apropos-accumulator |
261 | symbol f v p)) | |
262 | (setq v (apropos-value-internal 'boundp symbol 'symbol-value))) | |
3925e76d | 263 | (if do-all |
645c4f6a KH |
264 | (setq f (apropos-value-internal 'fboundp symbol 'symbol-function) |
265 | p (apropos-format-plist symbol "\n " t))) | |
3925e76d | 266 | (if (or f v p) |
645c4f6a KH |
267 | (setq apropos-accumulator (cons (list symbol f v p) |
268 | apropos-accumulator)))))) | |
269 | (apropos-print nil nil t)) | |
3925e76d KH |
270 | |
271 | ||
645c4f6a KH |
272 | ;;;###autoload |
273 | (defun apropos-documentation (apropos-regexp &optional do-all) | |
26a4a227 | 274 | "Show symbols whose documentation contain matches for REGEXP. |
645c4f6a KH |
275 | With optional prefix ARG or if `apropos-do-all' is non-nil, also use |
276 | documentation that is not stored in the documentation file and show key | |
277 | bindings. | |
278 | Returns list of symbols and documentation found." | |
279 | (interactive "sApropos documentation (regexp): \nP") | |
280 | (or do-all (setq do-all apropos-do-all)) | |
281 | (setq apropos-accumulator () apropos-files-scanned ()) | |
282 | (let ((standard-input (get-buffer-create " apropos-temp")) | |
283 | f v) | |
284 | (unwind-protect | |
285 | (save-excursion | |
286 | (set-buffer standard-input) | |
287 | (apropos-documentation-check-doc-file) | |
288 | (if do-all | |
289 | (mapatoms | |
290 | (lambda (symbol) | |
291 | (setq f (apropos-safe-documentation symbol) | |
26a4a227 KH |
292 | v (get symbol 'variable-documentation)) |
293 | (if (integerp v) (setq v)) | |
294 | (setq f (apropos-documentation-internal f) | |
295 | v (apropos-documentation-internal v)) | |
645c4f6a KH |
296 | (if (or f v) |
297 | (if (setq apropos-item | |
298 | (cdr (assq symbol apropos-accumulator))) | |
299 | (progn | |
300 | (if f | |
301 | (setcar apropos-item f)) | |
302 | (if v | |
303 | (setcar (cdr apropos-item) v))) | |
304 | (setq apropos-accumulator | |
305 | (cons (list symbol f v) | |
306 | apropos-accumulator))))))) | |
26a4a227 | 307 | (apropos-print nil nil t)) |
645c4f6a KH |
308 | (kill-buffer standard-input)))) |
309 | ||
310 | \f | |
311 | (defun apropos-value-internal (predicate symbol function) | |
312 | (if (funcall predicate symbol) | |
313 | (progn | |
314 | (setq symbol (prin1-to-string (funcall function symbol))) | |
315 | (if (string-match apropos-regexp symbol) | |
316 | (progn | |
317 | (if apropos-match-face | |
318 | (put-text-property (match-beginning 0) (match-end 0) | |
319 | 'face apropos-match-face | |
320 | symbol)) | |
321 | symbol))))) | |
322 | ||
323 | (defun apropos-documentation-internal (doc) | |
324 | (if (consp doc) | |
325 | (apropos-documentation-check-elc-file (car doc)) | |
326 | (and doc | |
327 | (string-match apropos-regexp doc) | |
328 | (progn | |
329 | (if apropos-match-face | |
330 | (put-text-property (match-beginning 0) | |
331 | (match-end 0) | |
332 | 'face apropos-match-face | |
333 | (setq doc (copy-sequence doc)))) | |
334 | doc)))) | |
335 | ||
336 | (defun apropos-format-plist (pl sep &optional compare) | |
3925e76d KH |
337 | (setq pl (symbol-plist pl)) |
338 | (let (p p-out) | |
339 | (while pl | |
340 | (setq p (format "%s %S" (car pl) (nth 1 pl))) | |
645c4f6a KH |
341 | (if (or (not compare) (string-match apropos-regexp p)) |
342 | (if apropos-property-face | |
3925e76d | 343 | (put-text-property 0 (length (symbol-name (car pl))) |
645c4f6a | 344 | 'face apropos-property-face p)) |
3925e76d | 345 | (setq p nil)) |
645c4f6a KH |
346 | (if p |
347 | (progn | |
348 | (and compare apropos-match-face | |
349 | (put-text-property (match-beginning 0) (match-end 0) | |
350 | 'face apropos-match-face | |
351 | p)) | |
352 | (setq p-out (concat p-out (if p-out sep) p)))) | |
3925e76d KH |
353 | (setq pl (nthcdr 2 pl))) |
354 | p-out)) | |
355 | ||
6f8e447f | 356 | |
645c4f6a | 357 | ;; Finds all documentation related to APROPOS-REGEXP in internal-doc-file-name. |
3925e76d | 358 | |
645c4f6a | 359 | (defun apropos-documentation-check-doc-file () |
26a4a227 KH |
360 | (let (type symbol (sepa 2) sepb beg end) |
361 | (insert ?\^_) | |
362 | (backward-char) | |
645c4f6a | 363 | (insert-file-contents (concat doc-directory internal-doc-file-name)) |
26a4a227 KH |
364 | (forward-char) |
365 | (while (save-excursion | |
366 | (setq sepb (search-forward "\^_")) | |
367 | (not (eobp))) | |
368 | (beginning-of-line 2) | |
369 | (if (save-restriction | |
370 | (narrow-to-region (point) (1- sepb)) | |
371 | (re-search-forward apropos-regexp nil t)) | |
372 | (progn | |
373 | (setq beg (match-beginning 0) | |
374 | end (point)) | |
375 | (goto-char (1+ sepa)) | |
376 | (or (setq type (if (eq ?F (preceding-char)) | |
377 | 1 ; function documentation | |
378 | 2) ; variable documentation | |
379 | symbol (read) | |
380 | beg (- beg (point) 1) | |
381 | end (- end (point) 1) | |
382 | doc (buffer-substring (1+ (point)) (1- sepb)) | |
383 | apropos-item (assq symbol apropos-accumulator)) | |
384 | (setq apropos-item (list symbol nil nil) | |
385 | apropos-accumulator (cons apropos-item | |
386 | apropos-accumulator))) | |
387 | (if apropos-match-face | |
388 | (put-text-property beg end 'face apropos-match-face doc)) | |
389 | (setcar (nthcdr type apropos-item) doc))) | |
390 | (setq sepa (goto-char sepb))))) | |
645c4f6a KH |
391 | |
392 | (defun apropos-documentation-check-elc-file (file) | |
393 | (if (member file apropos-files-scanned) | |
394 | nil | |
26a4a227 | 395 | (let (symbol doc beg end this-is-a-variable) |
645c4f6a KH |
396 | (setq apropos-files-scanned (cons file apropos-files-scanned)) |
397 | (erase-buffer) | |
398 | (insert-file-contents file) | |
399 | (while (search-forward "\n#@" nil t) | |
400 | ;; Read the comment length, and advance over it. | |
401 | (setq end (read) | |
26a4a227 KH |
402 | beg (1+ (point)) |
403 | end (+ (point) end -1)) | |
404 | (forward-char) | |
405 | (if (save-restriction | |
406 | ;; match ^ and $ relative to doc string | |
407 | (narrow-to-region beg end) | |
408 | (re-search-forward apropos-regexp nil t)) | |
645c4f6a | 409 | (progn |
26a4a227 KH |
410 | (goto-char (+ end 2)) |
411 | (setq doc (buffer-substring beg end) | |
412 | end (- (match-end 0) beg) | |
413 | beg (- (match-beginning 0) beg) | |
414 | this-is-a-variable (looking-at "(def\\(var\\|const\\) ") | |
645c4f6a KH |
415 | symbol (progn |
416 | (skip-chars-forward "(a-z") | |
26a4a227 | 417 | (forward-char) |
645c4f6a KH |
418 | (read)) |
419 | symbol (if (consp symbol) | |
420 | (nth 1 symbol) | |
421 | symbol)) | |
422 | (if (if this-is-a-variable | |
423 | (get symbol 'variable-documentation) | |
424 | (and (fboundp symbol) (apropos-safe-documentation symbol))) | |
425 | (progn | |
426 | (or (setq apropos-item (assq symbol apropos-accumulator)) | |
427 | (setq apropos-item (list symbol nil nil) | |
428 | apropos-accumulator (cons apropos-item | |
429 | apropos-accumulator))) | |
430 | (if apropos-match-face | |
26a4a227 | 431 | (put-text-property beg end 'face apropos-match-face |
645c4f6a KH |
432 | doc)) |
433 | (setcar (nthcdr (if this-is-a-variable 2 1) | |
434 | apropos-item) | |
26a4a227 | 435 | doc))))))))) |
645c4f6a KH |
436 | |
437 | ||
438 | ||
439 | (defun apropos-safe-documentation (function) | |
6f8e447f RS |
440 | "Like documentation, except it avoids calling `get_doc_string'. |
441 | Will return nil instead." | |
3925e76d | 442 | (while (and function (symbolp function)) |
6f8e447f | 443 | (setq function (if (fboundp function) |
3925e76d | 444 | (symbol-function function)))) |
d2e1218f RS |
445 | (if (eq (car-safe function) 'macro) |
446 | (setq function (cdr function))) | |
3925e76d | 447 | (setq function (if (byte-code-function-p function) |
645c4f6a KH |
448 | (if (> (length function) 4) |
449 | (aref function 4)) | |
450 | (if (eq (car-safe function) 'autoload) | |
451 | (nth 2 function) | |
452 | (if (eq (car-safe function) 'lambda) | |
453 | (if (stringp (nth 2 function)) | |
454 | (nth 2 function) | |
455 | (if (stringp (nth 3 function)) | |
456 | (nth 3 function))))))) | |
457 | (if (integerp function) | |
458 | nil | |
459 | function)) | |
460 | ||
461 | ||
462 | ||
463 | (defun apropos-print (do-keys doc-fn spacing) | |
464 | "Output result of various apropos commands with `apropos-regexp'. | |
465 | APROPOS-ACCUMULATOR is a list. Optional DOC-FN is called for each element | |
466 | of apropos-accumulator and may modify it resulting in (symbol fn-doc | |
3925e76d KH |
467 | var-doc [plist-doc]). Returns sorted list of symbols and documentation |
468 | found." | |
645c4f6a KH |
469 | (if (null apropos-accumulator) |
470 | (message "No apropos matches for `%s'" apropos-regexp) | |
3925e76d | 471 | (if doc-fn |
645c4f6a KH |
472 | (funcall doc-fn apropos-accumulator)) |
473 | (setq apropos-accumulator | |
474 | (sort apropos-accumulator (lambda (a b) | |
26a4a227 | 475 | (string-lessp (car a) (car b))))) |
645c4f6a KH |
476 | (and apropos-label-face |
477 | (symbolp apropos-label-face) | |
478 | (setq apropos-label-face `(face ,apropos-label-face | |
479 | mouse-face highlight))) | |
09e32aaf | 480 | (with-output-to-temp-buffer "*Apropos*" |
645c4f6a | 481 | (let ((p apropos-accumulator) |
3925e76d | 482 | (old-buffer (current-buffer)) |
645c4f6a | 483 | symbol item point1 point2) |
26a4a227 KH |
484 | (set-buffer standard-output) |
485 | (apropos-mode) | |
486 | (if window-system | |
1f64403f EN |
487 | (insert "If you move the mouse over text that changes color,\n" |
488 | (substitute-command-keys | |
3787cf2c | 489 | "you can click \\[apropos-mouse-follow] to get more information.\n"))) |
26a4a227 KH |
490 | (insert (substitute-command-keys |
491 | "In this buffer, type \\[apropos-follow] to get full documentation.\n\n")) | |
492 | (while (consp p) | |
493 | (or (not spacing) (bobp) (terpri)) | |
494 | (setq apropos-item (car p) | |
495 | symbol (car apropos-item) | |
496 | p (cdr p) | |
497 | point1 (point)) | |
498 | (princ symbol) ; print symbol name | |
499 | (setq point2 (point)) | |
98ce2330 | 500 | ;; Calculate key-bindings if we want them. |
26a4a227 KH |
501 | (and do-keys |
502 | (commandp symbol) | |
503 | (indent-to 30 1) | |
98ce2330 RS |
504 | (if (let ((keys |
505 | (save-excursion | |
506 | (set-buffer old-buffer) | |
507 | (where-is-internal symbol))) | |
508 | filtered) | |
509 | ;; Copy over the list of key sequences, | |
510 | ;; omitting any that contain a buffer or a frame. | |
511 | (while keys | |
512 | (let ((key (car keys)) | |
513 | (i 0) | |
514 | loser) | |
515 | (while (< i (length key)) | |
516 | (if (or (framep (aref key i)) | |
517 | (bufferp (aref key i))) | |
518 | (setq loser t)) | |
519 | (setq i (1+ i))) | |
520 | (or loser | |
521 | (setq filtered (cons key filtered)))) | |
522 | (setq keys (cdr keys))) | |
523 | (setq item filtered)) | |
524 | ;; Convert the remaining keys to a string and insert. | |
525 | (insert | |
26a4a227 | 526 | (mapconcat |
98ce2330 RS |
527 | (lambda (key) |
528 | (setq key (key-description key)) | |
529 | (if apropos-keybinding-face | |
26a4a227 KH |
530 | (put-text-property 0 (length key) |
531 | 'face apropos-keybinding-face | |
98ce2330 RS |
532 | key)) |
533 | key) | |
534 | item ", ")) | |
82fbaa5e RS |
535 | (insert "M-x") |
536 | (put-text-property (- (point) 3) (point) | |
537 | 'face apropos-keybinding-face) | |
538 | (insert " " (symbol-name symbol) " ") | |
539 | (insert "RET") | |
540 | (put-text-property (- (point) 3) (point) | |
541 | 'face apropos-keybinding-face))) | |
26a4a227 KH |
542 | (terpri) |
543 | ;; only now so we don't propagate text attributes all over | |
544 | (put-text-property point1 point2 'item | |
545 | (if (eval `(or ,@(cdr apropos-item))) | |
546 | (car apropos-item) | |
547 | apropos-item)) | |
548 | (if apropos-symbol-face | |
549 | (put-text-property point1 point2 'face apropos-symbol-face)) | |
550 | (apropos-print-doc 'describe-function 1 | |
551 | (if (commandp symbol) | |
552 | "Command" | |
553 | (if (apropos-macrop symbol) | |
554 | "Macro" | |
555 | "Function")) | |
556 | do-keys) | |
5edc67d3 RS |
557 | (if (get symbol 'custom-type) |
558 | (apropos-print-doc 'customize-variable-other-window 2 | |
559 | "User Option" do-keys) | |
560 | (apropos-print-doc 'describe-variable 2 | |
561 | "Variable" do-keys)) | |
6cb0a57b | 562 | (apropos-print-doc 'customize-group-other-window 6 "Group" do-keys) |
5edc67d3 RS |
563 | (apropos-print-doc 'customize-face-other-window 5 "Face" do-keys) |
564 | (apropos-print-doc 'widget-browse-other-window 4 "Widget" do-keys) | |
26a4a227 KH |
565 | (apropos-print-doc 'apropos-describe-plist 3 |
566 | "Plist" nil))))) | |
645c4f6a KH |
567 | (prog1 apropos-accumulator |
568 | (setq apropos-accumulator ()))) ; permit gc | |
569 | ||
3925e76d | 570 | |
645c4f6a KH |
571 | (defun apropos-macrop (symbol) |
572 | "T if SYMBOL is a Lisp macro." | |
573 | (and (fboundp symbol) | |
574 | (consp (setq symbol | |
575 | (symbol-function symbol))) | |
576 | (or (eq (car symbol) 'macro) | |
577 | (if (eq (car symbol) 'autoload) | |
578 | (memq (nth 4 symbol) | |
579 | '(macro t)))))) | |
3925e76d | 580 | |
645c4f6a KH |
581 | |
582 | (defun apropos-print-doc (action i str do-keys) | |
583 | (if (stringp (setq i (nth i apropos-item))) | |
3925e76d KH |
584 | (progn |
585 | (insert " ") | |
586 | (put-text-property (- (point) 2) (1- (point)) | |
587 | 'action action) | |
645c4f6a KH |
588 | (insert str ": ") |
589 | (if apropos-label-face | |
590 | (add-text-properties (- (point) (length str) 2) | |
3925e76d | 591 | (1- (point)) |
645c4f6a KH |
592 | apropos-label-face)) |
593 | (insert (if do-keys (substitute-command-keys i) i)) | |
594 | (or (bolp) (terpri))))) | |
3925e76d KH |
595 | |
596 | ||
597 | (defun apropos-mouse-follow (event) | |
598 | (interactive "e") | |
26a4a227 | 599 | (let ((other (if (eq (current-buffer) (get-buffer "*Apropos*")) |
3925e76d KH |
600 | () |
601 | (current-buffer)))) | |
17ef0353 RS |
602 | (save-excursion |
603 | (set-buffer (window-buffer (posn-window (event-start event)))) | |
604 | (goto-char (posn-point (event-start event))) | |
605 | (or (and (not (eobp)) (get-text-property (point) 'mouse-face)) | |
606 | (and (not (bobp)) (get-text-property (1- (point)) 'mouse-face)) | |
607 | (error "There is nothing to follow here")) | |
17ef0353 | 608 | (apropos-follow other)))) |
3925e76d KH |
609 | |
610 | ||
611 | (defun apropos-follow (&optional other) | |
612 | (interactive) | |
17ef0353 RS |
613 | (let* (;; Properties are always found at the beginning of the line. |
614 | (bol (save-excursion (beginning-of-line) (point))) | |
615 | ;; If there is no `item' property here, look behind us. | |
616 | (item (get-text-property bol 'item)) | |
617 | (item-at (if item nil (previous-single-property-change bol 'item))) | |
618 | ;; Likewise, if there is no `action' property here, look in front. | |
619 | (action (get-text-property bol 'action)) | |
620 | (action-at (if action nil (next-single-property-change bol 'action)))) | |
621 | (and (null item) item-at | |
622 | (setq item (get-text-property (1- item-at) 'item))) | |
623 | (and (null action) action-at | |
624 | (setq action (get-text-property action-at 'action))) | |
625 | (if (not (and item action)) | |
0a812366 | 626 | (error "There is nothing to follow here")) |
17ef0353 RS |
627 | (if (consp item) (error "There is nothing to follow in `%s'" (car item))) |
628 | (if other (set-buffer other)) | |
629 | (funcall action item))) | |
3925e76d KH |
630 | |
631 | ||
632 | ||
633 | (defun apropos-describe-plist (symbol) | |
634 | "Display a pretty listing of SYMBOL's plist." | |
635 | (with-output-to-temp-buffer "*Help*" | |
636 | (set-buffer standard-output) | |
637 | (princ "Symbol ") | |
638 | (prin1 symbol) | |
639 | (princ "'s plist is\n (") | |
645c4f6a KH |
640 | (if apropos-symbol-face |
641 | (put-text-property 8 (- (point) 14) 'face apropos-symbol-face)) | |
3925e76d | 642 | (insert (apropos-format-plist symbol "\n ")) |
26a4a227 KH |
643 | (princ ")") |
644 | (print-help-return-message))) | |
6f8e447f | 645 | |
896546cd RS |
646 | (provide 'apropos) |
647 | ||
c0274f38 | 648 | ;;; apropos.el ends here |