1 ;;; apropos.el --- apropos commands for users and programmers
3 ;; Copyright (C) 1989, 1994, 1995, 2001, 2002 Free Software Foundation, Inc.
5 ;; Author: Joe Wells <jbw@bigbird.bu.edu>
6 ;; Rewritten: Daniel Pfeiffer <occitan@esperanto.org>
9 ;; This file is part of GNU Emacs.
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
13 ;; the Free Software Foundation; either version 2, or (at your option)
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.
21 ;; You should have received a copy of the GNU General Public License
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.
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.
33 ;; The idea for super-apropos is based on the original implementation
34 ;; by Lynn Slater <lrs@esl.com>.
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.
40 ;;; Made fast-apropos and super-apropos share code.
41 ;;; Sped up fast-apropos again.
42 ;; Added apropos-do-all option.
43 ;;; Added fast-command-apropos.
44 ;; Changed doc strings to comments for helping functions.
45 ;;; Made doc file buffer read-only, buried it.
46 ;; Only call substitute-command-keys if do-all set.
48 ;; Optionally use configurable faces to make the output more legible.
49 ;; Differentiate between command, function and macro.
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.
63 "Apropos commands for users and programmers"
67 ;; I see a degradation of maybe 10-20% only.
68 (defcustom apropos-do-all nil
69 "*Whether the apropos commands should do more.
71 Slows them down more or less. Set this non-nil if you have a fast machine."
76 (defcustom apropos-symbol-face 'bold
77 "*Face for symbol name in Apropos output, or nil for none."
81 (defcustom apropos-keybinding-face 'underline
82 "*Face for lists of keybinding in Apropos output, or nil for none."
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."
93 (defcustom apropos-property-face 'bold-italic
94 "*Face for property name in apropos output, or nil for none."
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."
106 (defvar apropos-mode-map
107 (let ((map (make-sparse-keymap)))
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.
112 (define-key map "\C-m" 'apropos-follow)
113 (define-key map " " 'scroll-up)
114 (define-key map "\177" 'scroll-down)
115 (define-key map "q" 'quit-window)
117 "Keymap used in Apropos mode.")
119 (defvar apropos-mode-hook nil
120 "*Hook run when mode is turned on.")
122 (defvar apropos-show-scores nil
123 "*Show apropos scores if non-nil.")
125 (defvar apropos-regexp nil
126 "Regexp used in current apropos run.")
128 (defvar apropos-orig-regexp nil
129 "Regexp as entered by user.")
131 (defvar apropos-all-regexp nil
132 "Regexp matching apropos-all-words.")
134 (defvar apropos-files-scanned ()
135 "List of elc files already scanned in current run of `apropos-documentation'.")
137 (defvar apropos-accumulator ()
138 "Alist of symbols already found in current apropos run.")
140 (defvar apropos-item ()
141 "Current item in or for `apropos-accumulator'.")
143 (defvar apropos-synonyms '(
144 ("find" "open" "edit")
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.")
151 (defvar apropos-words ()
152 "Current list of words.")
154 (defvar apropos-all-words ()
155 "Current list of words and synonyms.")
158 ;;; Button types used by apropos
160 (define-button-type 'apropos-symbol
161 'face apropos-symbol-face
162 'help-echo "mouse-2, RET: Display more help on this symbol"
163 'action #'apropos-symbol-button-display-help
166 (defun apropos-symbol-button-display-help (button)
167 "Display further help for the `apropos-symbol' button BUTTON."
169 (or (apropos-next-label-button (button-start button))
170 (error "There is nothing to follow for `%s'" (button-label button)))))
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")
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))))
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))))
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)
209 (customize-group-other-window
210 (button-get button 'apropos-symbol))))
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))))
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))))
224 (defun apropos-next-label-button (pos)
225 "Return the next apropos label button after POS, or nil if there's none.
226 Will also return nil if more than one `apropos-symbol' button is encountered
227 before finding a label."
228 (let* ((button (next-button pos t))
229 (already-hit-symbol nil)
230 (label (and button (button-get button 'apropos-label)))
231 (type (and button (button-get button 'type))))
234 (or (not (eq type 'apropos-symbol))
235 (not already-hit-symbol)))
236 (when (eq type 'apropos-symbol)
237 (setq already-hit-symbol t))
238 (setq button (next-button (button-start button)))
240 (setq label (button-get button 'apropos-label))
241 (setq type (button-get button 'type))))
245 (defun apropos-words-to-regexp (words wild)
246 "Make regexp matching any two of the words in WORDS."
248 (mapconcat 'identity words "\\|")
252 (mapconcat 'identity words "\\|")
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]+")))
269 (let ((syn apropos-synonyms) (s word) (a word))
271 (if (member word (car syn))
273 (setq a (mapconcat 'identity (car syn) "\\|"))
274 (if (member word (cdr (car syn)))
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)))
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."
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)))))
297 (defun apropos-score-str (str)
298 "Return apropos score for string STR."
304 (dolist (s (apropos-calc-scores str apropos-all-words) score)
305 (setq score (+ score 1000 (/ (* (- l s) 1000) l)))))
308 (defun apropos-score-doc (doc)
309 "Return apropos score for documentation string DOC."
314 (dolist (s (apropos-calc-scores doc apropos-all-words) score)
315 (setq score (+ score 50 (/ (* (- l s) 50) l)))))
318 (defun apropos-score-symbol (symbol &optional weight)
319 "Return apropos score for SYMBOL."
320 (setq symbol (symbol-name symbol))
324 (dolist (s (apropos-calc-scores symbol apropos-words) (* score (or weight 3)))
325 (setq score (+ score (- 60 l) (/ (* (- l s) 60) l))))))
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)."
334 (> (length (apropos-calc-scores str words)) 1)))
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)))
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)))
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))
349 (define-derived-mode apropos-mode fundamental-mode "Apropos"
350 "Major mode for following hyperlinks in output of apropos commands.
352 \\{apropos-mode-map}")
355 (defun apropos-variable (regexp &optional do-all)
356 "Show user variables that match REGEXP.
357 With optional prefix DO-ALL or if `apropos-do-all' is non-nil, also show
359 (interactive (list (read-string
361 (if (or current-prefix-arg apropos-do-all)
364 " (regexp or words): "))
366 (apropos-command regexp nil
367 (if (or do-all apropos-do-all)
370 (get symbol 'variable-documentation)))
373 ;; For auld lang syne:
375 (defalias 'command-apropos 'apropos-command)
377 (defun apropos-command (apropos-regexp &optional do-all var-predicate)
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
380 noninteractive functions.
382 If VAR-PREDICATE is non-nil, show only variables, and only those that
383 satisfy the predicate VAR-PREDICATE."
384 (interactive (list (read-string (concat
386 (if (or current-prefix-arg
389 "(regexp or words): "))
391 (setq apropos-regexp (apropos-rewrite-regexp apropos-regexp))
393 (let ((standard-output (get-buffer-create "*Apropos*")))
394 (print-help-return-message 'identity))))
395 (or do-all (setq do-all apropos-do-all))
396 (setq apropos-accumulator
397 (apropos-internal apropos-regexp
399 (if do-all 'functionp 'commandp))))
400 (let ((tem apropos-accumulator))
402 (if (or (get (car tem) 'apropos-inhibit)
403 (apropos-false-hit-symbol (car tem)))
404 (setq apropos-accumulator (delq (car tem) apropos-accumulator)))
405 (setq tem (cdr tem))))
406 (let ((p apropos-accumulator)
410 (setq symbol (car p))
411 (setq score (apropos-score-symbol symbol))
412 (unless var-predicate
413 (if (functionp symbol)
414 (if (setq doc (documentation symbol t))
416 (setq score (+ score (apropos-score-doc doc)))
417 (substring doc 0 (string-match "\n" doc)))
418 "(not documented)")))
420 (funcall var-predicate symbol)
421 (if (setq doc (documentation-property
422 symbol 'variable-documentation t))
424 (setq score (+ score (apropos-score-doc doc)))
426 (string-match "\n" doc)))))))
427 (setcar (cdr (car p)) score)
429 (and (apropos-print t nil)
435 (defun apropos (apropos-regexp &optional do-all)
436 "Show all bound symbols whose names match APROPOS-REGEXP.
437 With optional prefix DO-ALL or if `apropos-do-all' is non-nil, also
438 show unbound symbols and key bindings, which is a little more
439 time-consuming. Returns list of symbols and documentation found."
440 (interactive "sApropos symbol (regexp or words): \nP")
441 (setq apropos-regexp (apropos-rewrite-regexp apropos-regexp))
442 (setq apropos-accumulator
443 (apropos-internal apropos-regexp
450 (symbol-plist symbol))))))
451 (let ((tem apropos-accumulator))
453 (if (get (car tem) 'apropos-inhibit)
454 (setq apropos-accumulator (delq (car tem) apropos-accumulator)))
455 (setq tem (cdr tem))))
456 (let ((p apropos-accumulator)
457 symbol doc properties)
460 (setq symbol (car p))
462 (when (fboundp symbol)
463 (if (setq doc (condition-case nil
464 (documentation symbol t)
466 "(alias for undefined function)")))
467 (substring doc 0 (string-match "\n" doc))
469 (when (boundp symbol)
470 (if (setq doc (documentation-property
471 symbol 'variable-documentation t))
472 (substring doc 0 (string-match "\n" doc))
474 (when (setq properties (symbol-plist symbol))
475 (setq doc (list (car properties)))
476 (while (setq properties (cdr (cdr properties)))
477 (setq doc (cons (car properties) doc)))
478 (mapconcat #'symbol-name (nreverse doc) " "))
479 (when (get symbol 'widget-type)
480 (if (setq doc (documentation-property
481 symbol 'widget-documentation t))
483 (string-match "\n" doc))
486 (if (setq doc (documentation-property
487 symbol 'face-documentation t))
489 (string-match "\n" doc))
491 (when (get symbol 'custom-group)
492 (if (setq doc (documentation-property
493 symbol 'group-documentation t))
495 (string-match "\n" doc))
496 "(not documented)"))))
499 (or do-all apropos-do-all)
504 (defun apropos-value (apropos-regexp &optional do-all)
505 "Show all symbols whose value's printed image matches APROPOS-REGEXP.
506 With optional prefix DO-ALL or if `apropos-do-all' is non-nil, also looks
507 at the function and at the names and values of properties.
508 Returns list of symbols and values found."
509 (interactive "sApropos value (regexp or words): \nP")
510 (setq apropos-regexp (apropos-rewrite-regexp apropos-regexp))
511 (or do-all (setq do-all apropos-do-all))
512 (setq apropos-accumulator ())
516 (setq f nil v nil p nil)
517 (or (memq symbol '(apropos-regexp
518 apropos-orig-regexp apropos-all-regexp
519 apropos-words apropos-all-words
520 do-all apropos-accumulator
522 (setq v (apropos-value-internal 'boundp symbol 'symbol-value)))
524 (setq f (apropos-value-internal 'fboundp symbol 'symbol-function)
525 p (apropos-format-plist symbol "\n " t)))
526 (if (apropos-false-hit-str v)
528 (if (apropos-false-hit-str f)
530 (if (apropos-false-hit-str p)
533 (setq apropos-accumulator (cons (list symbol
534 (+ (apropos-score-str f)
535 (apropos-score-str v)
536 (apropos-score-str p))
538 apropos-accumulator))))))
539 (apropos-print nil "\n----------------\n"))
543 (defun apropos-documentation (apropos-regexp &optional do-all)
544 "Show symbols whose documentation contain matches for APROPOS-REGEXP.
545 With optional prefix DO-ALL or if `apropos-do-all' is non-nil, also use
546 documentation that is not stored in the documentation file and show key
548 Returns list of symbols and documentation found."
549 (interactive "sApropos documentation (regexp or words): \nP")
550 (setq apropos-regexp (apropos-rewrite-regexp apropos-regexp))
551 (or do-all (setq do-all apropos-do-all))
552 (setq apropos-accumulator () apropos-files-scanned ())
553 (let ((standard-input (get-buffer-create " apropos-temp"))
557 (set-buffer standard-input)
558 (apropos-documentation-check-doc-file)
562 (setq f (apropos-safe-documentation symbol)
563 v (get symbol 'variable-documentation))
564 (if (integerp v) (setq v))
565 (setq f (apropos-documentation-internal f)
566 v (apropos-documentation-internal v))
567 (setq sf (apropos-score-doc f)
568 sv (apropos-score-doc v))
570 (if (setq apropos-item
571 (cdr (assq symbol apropos-accumulator)))
575 (setcar (nthcdr 1 apropos-item) f)
576 (setcar apropos-item (+ (car apropos-item) sf))))
579 (setcar (nthcdr 2 apropos-item) v)
580 (setcar apropos-item (+ (car apropos-item) sv)))))
581 (setq apropos-accumulator
583 (+ (apropos-score-symbol symbol 2) sf sv)
585 apropos-accumulator)))))))
586 (apropos-print nil "\n----------------\n"))
587 (kill-buffer standard-input))))
590 (defun apropos-value-internal (predicate symbol function)
591 (if (funcall predicate symbol)
593 (setq symbol (prin1-to-string (funcall function symbol)))
594 (if (string-match apropos-regexp symbol)
596 (if apropos-match-face
597 (put-text-property (match-beginning 0) (match-end 0)
598 'face apropos-match-face
602 (defun apropos-documentation-internal (doc)
604 (apropos-documentation-check-elc-file (car doc))
606 (string-match apropos-all-regexp doc)
607 (save-match-data (apropos-true-hit-doc doc))
609 (if apropos-match-face
610 (put-text-property (match-beginning 0)
612 'face apropos-match-face
613 (setq doc (copy-sequence doc))))
616 (defun apropos-format-plist (pl sep &optional compare)
617 (setq pl (symbol-plist pl))
620 (setq p (format "%s %S" (car pl) (nth 1 pl)))
621 (if (or (not compare) (string-match apropos-regexp p))
622 (if apropos-property-face
623 (put-text-property 0 (length (symbol-name (car pl)))
624 'face apropos-property-face p))
628 (and compare apropos-match-face
629 (put-text-property (match-beginning 0) (match-end 0)
630 'face apropos-match-face
632 (setq p-out (concat p-out (if p-out sep) p))))
633 (setq pl (nthcdr 2 pl)))
637 ;; Finds all documentation related to APROPOS-REGEXP in internal-doc-file-name.
639 (defun apropos-documentation-check-doc-file ()
640 (let (type symbol (sepa 2) sepb beg end)
643 (insert-file-contents (concat doc-directory internal-doc-file-name))
645 (while (save-excursion
646 (setq sepb (search-forward "\^_"))
648 (beginning-of-line 2)
649 (if (save-restriction
650 (narrow-to-region (point) (1- sepb))
651 (re-search-forward apropos-all-regexp nil t))
653 (setq beg (match-beginning 0)
655 (goto-char (1+ sepa))
656 (setq type (if (eq ?F (preceding-char))
657 2 ; function documentation
658 3) ; variable documentation
660 beg (- beg (point) 1)
661 end (- end (point) 1)
662 doc (buffer-substring (1+ (point)) (1- sepb)))
663 (when (apropos-true-hit-doc doc)
664 (or (and (setq apropos-item (assq symbol apropos-accumulator))
665 (setcar (cdr apropos-item)
666 (+ (cadr apropos-item) (apropos-score-doc doc))))
667 (setq apropos-item (list symbol
668 (+ (apropos-score-symbol symbol 2)
669 (apropos-score-doc doc))
671 apropos-accumulator (cons apropos-item
672 apropos-accumulator)))
673 (if apropos-match-face
674 (put-text-property beg end 'face apropos-match-face doc))
675 (setcar (nthcdr type apropos-item) doc))))
676 (setq sepa (goto-char sepb)))))
678 (defun apropos-documentation-check-elc-file (file)
679 (if (member file apropos-files-scanned)
681 (let (symbol doc beg end this-is-a-variable)
682 (setq apropos-files-scanned (cons file apropos-files-scanned))
684 (insert-file-contents file)
685 (while (search-forward "\n#@" nil t)
686 ;; Read the comment length, and advance over it.
689 end (+ (point) end -1))
691 (if (save-restriction
692 ;; match ^ and $ relative to doc string
693 (narrow-to-region beg end)
694 (re-search-forward apropos-all-regexp nil t))
696 (goto-char (+ end 2))
697 (setq doc (buffer-substring beg end)
698 end (- (match-end 0) beg)
699 beg (- (match-beginning 0) beg))
700 (when (apropos-true-hit-doc doc)
701 (setq this-is-a-variable (looking-at "(def\\(var\\|const\\) ")
703 (skip-chars-forward "(a-z")
706 symbol (if (consp symbol)
709 (if (if this-is-a-variable
710 (get symbol 'variable-documentation)
711 (and (fboundp symbol) (apropos-safe-documentation symbol)))
713 (or (and (setq apropos-item (assq symbol apropos-accumulator))
714 (setcar (cdr apropos-item)
715 (+ (cadr apropos-item) (apropos-score-doc doc))))
716 (setq apropos-item (list symbol
717 (+ (apropos-score-symbol symbol 2)
718 (apropos-score-doc doc))
720 apropos-accumulator (cons apropos-item
721 apropos-accumulator)))
722 (if apropos-match-face
723 (put-text-property beg end 'face apropos-match-face
725 (setcar (nthcdr (if this-is-a-variable 3 2)
731 (defun apropos-safe-documentation (function)
732 "Like `documentation', except it avoids calling `get_doc_string'.
733 Will return nil instead."
734 (while (and function (symbolp function))
735 (setq function (if (fboundp function)
736 (symbol-function function))))
737 (if (eq (car-safe function) 'macro)
738 (setq function (cdr function)))
739 (setq function (if (byte-code-function-p function)
740 (if (> (length function) 4)
742 (if (eq (car-safe function) 'autoload)
744 (if (eq (car-safe function) 'lambda)
745 (if (stringp (nth 2 function))
747 (if (stringp (nth 3 function))
748 (nth 3 function)))))))
749 (if (integerp function)
754 (defun apropos-print (do-keys spacing)
755 "Output result of apropos searching into buffer `*Apropos*'.
756 The value of `apropos-accumulator' is the list of items to output.
757 Each element should have the format
758 (SYMBOL SCORE FN-DOC VAR-DOC [PLIST-DOC WIDGET-DOC FACE-DOC GROUP-DOC]).
759 The return value is the list that was in `apropos-accumulator', sorted
760 alphabetically by symbol name; but this function also sets
761 `apropos-accumulator' to nil before returning.
763 If SPACING is non-nil, it should be a string;
764 separate items with that string."
765 (if (null apropos-accumulator)
766 (message "No apropos matches for `%s'" apropos-orig-regexp)
767 (setq apropos-accumulator
768 (sort apropos-accumulator (lambda (a b)
769 (or (> (cadr a) (cadr b))
770 (and (= (cadr a) (cadr b))
771 (string-lessp (car a) (car b)))))))
772 (with-output-to-temp-buffer "*Apropos*"
773 (let ((p apropos-accumulator)
774 (old-buffer (current-buffer))
776 (set-buffer standard-output)
778 (if (display-mouse-p)
780 "If moving the mouse over text changes the text's color, "
782 "mouse-2 (second button from right) on that text to "
783 "get more information.\n"))
784 (insert "In this buffer, go to the name of the command, or function,"
786 (substitute-command-keys
787 "and type \\[apropos-follow] to get full documentation.\n\n"))
789 (when (and spacing (not (bobp)))
791 (setq apropos-item (car p)
792 symbol (car apropos-item)
794 (insert-text-button (symbol-name symbol)
795 'type 'apropos-symbol
796 ;; Can't use default, since user may have
797 ;; changed the variable!
798 ;; Just say `no' to variables containing faces!
799 'face apropos-symbol-face)
800 (if apropos-show-scores
801 (insert " (" (number-to-string (cadr apropos-item)) ") "))
802 ;; Calculate key-bindings if we want them.
808 (set-buffer old-buffer)
809 (where-is-internal symbol)))
811 ;; Copy over the list of key sequences,
812 ;; omitting any that contain a buffer or a frame.
814 (let ((key (car keys))
817 (while (< i (length key))
818 (if (or (framep (aref key i))
819 (bufferp (aref key i)))
823 (setq filtered (cons key filtered))))
824 (setq keys (cdr keys)))
825 (setq item filtered))
826 ;; Convert the remaining keys to a string and insert.
830 (setq key (condition-case ()
831 (key-description key)
833 (if apropos-keybinding-face
834 (put-text-property 0 (length key)
835 'face apropos-keybinding-face
840 (put-text-property (- (point) 3) (point)
841 'face apropos-keybinding-face)
842 (insert " " (symbol-name symbol) " ")
844 (put-text-property (- (point) 3) (point)
845 'face apropos-keybinding-face)))
848 (if (commandp symbol)
850 (if (apropos-macrop symbol)
854 (apropos-print-doc 3 'apropos-variable t)
855 (apropos-print-doc 7 'apropos-group t)
856 (apropos-print-doc 6 'apropos-face t)
857 (apropos-print-doc 5 'apropos-widget t)
858 (apropos-print-doc 4 'apropos-plist nil))
859 (setq buffer-read-only t))))
860 (prog1 apropos-accumulator
861 (setq apropos-accumulator ()))) ; permit gc
864 (defun apropos-macrop (symbol)
865 "T if SYMBOL is a Lisp macro."
866 (and (fboundp symbol)
868 (symbol-function symbol)))
869 (or (eq (car symbol) 'macro)
870 (if (eq (car symbol) 'autoload)
875 (defun apropos-print-doc (i type do-keys)
876 (if (stringp (setq i (nth i apropos-item)))
879 (insert-text-button (button-type-get type 'apropos-label)
881 ;; Can't use the default button face, since
882 ;; user may have changed the variable!
883 ;; Just say `no' to variables containing faces!
884 'face apropos-label-face
885 'apropos-symbol (car apropos-item))
887 (insert (if do-keys (substitute-command-keys i) i))
888 (or (bolp) (terpri)))))
891 (defun apropos-follow ()
892 "Invokes any button at point, otherwise invokes the nearest label button."
895 (or (apropos-next-label-button (line-beginning-position))
896 (error "There is nothing to follow here"))))
899 (defun apropos-describe-plist (symbol)
900 "Display a pretty listing of SYMBOL's plist."
901 (with-output-to-temp-buffer "*Help*"
902 (set-buffer standard-output)
905 (princ "'s plist is\n (")
906 (if apropos-symbol-face
907 (put-text-property 8 (- (point) 14) 'face apropos-symbol-face))
908 (insert (apropos-format-plist symbol "\n "))
910 (print-help-return-message)))
915 ;;; apropos.el ends here