-;;; apropos.el --- faster apropos commands.
+;;; apropos.el --- apropos commands for users and programmers
-;; Copyright (C) 1989, 1994 Free Software Foundation, Inc.
+;; Copyright (C) 1989, 1994, 1995, 2001, 2002, 2003, 2004,
+;; 2005, 2006 Free Software Foundation, Inc.
;; Author: Joe Wells <jbw@bigbird.bu.edu>
+;; Rewritten: Daniel Pfeiffer <occitan@esperanto.org>
;; Keywords: help
;; This file is part of GNU Emacs.
;; GNU General Public License for more details.
;; You should have received a copy of the GNU General Public License
-;; along with GNU Emacs; see the file COPYING. If not, write to
-;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
+;; along with GNU Emacs; see the file COPYING. If not, write to the
+;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+;; Boston, MA 02110-1301, USA.
;;; Commentary:
;; Fixed bug, current-local-map can return nil.
;; Change, doesn't calculate key-bindings unless needed.
;; Added super-apropos capability, changed print functions.
-;; Made fast-apropos and super-apropos share code.
-;; Sped up fast-apropos again.
+;;; Made fast-apropos and super-apropos share code.
+;;; Sped up fast-apropos again.
;; Added apropos-do-all option.
-;; Added fast-command-apropos.
+;;; Added fast-command-apropos.
;; Changed doc strings to comments for helping functions.
-;; Made doc file buffer read-only, buried it.
+;;; Made doc file buffer read-only, buried it.
;; Only call substitute-command-keys if do-all set.
+;; Optionally use configurable faces to make the output more legible.
+;; Differentiate between command, function and macro.
+;; Apropos-command (ex command-apropos) does cmd and optionally user var.
+;; Apropos shows all 3 aspects of symbols (fn, var and plist)
+;; Apropos-documentation (ex super-apropos) now finds all it should.
+;; New apropos-value snoops through all values and optionally plists.
+;; Reading DOC file doesn't load nroff.
+;; Added hypertext following of documentation, mouse-2 on variable gives value
+;; from buffer in active window.
+
;;; Code:
-(defvar apropos-do-all nil
- "*Whether `apropos' and `super-apropos' should do everything that they can.
-Makes them run 2 or 3 times slower. Set this non-nil if you have a fast
-machine.")
+(require 'button)
+(eval-when-compile (require 'cl))
+
+(defgroup apropos nil
+ "Apropos commands for users and programmers."
+ :group 'help
+ :prefix "apropos")
+
+;; I see a degradation of maybe 10-20% only.
+(defcustom apropos-do-all nil
+ "*Whether the apropos commands should do more.
+
+Slows them down more or less. Set this non-nil if you have a fast machine."
+ :group 'apropos
+ :type 'boolean)
+
+
+(defcustom apropos-symbol-face 'bold
+ "*Face for symbol name in Apropos output, or nil for none."
+ :group 'apropos
+ :type 'face)
+
+(defcustom apropos-keybinding-face 'underline
+ "*Face for lists of keybinding in Apropos output, or nil for none."
+ :group 'apropos
+ :type 'face)
+
+(defcustom apropos-label-face 'italic
+ "*Face for label (`Command', `Variable' ...) in Apropos output.
+A value of nil means don't use any special font for them, and also
+turns off mouse highlighting."
+ :group 'apropos
+ :type 'face)
+
+(defcustom apropos-property-face 'bold-italic
+ "*Face for property name in apropos output, or nil for none."
+ :group 'apropos
+ :type 'face)
+
+(defcustom apropos-match-face 'match
+ "*Face for matching text in Apropos documentation/value, or nil for none.
+This applies when you look for matches in the documentation or variable value
+for the pattern; the part that matches gets displayed in this font."
+ :group 'apropos
+ :type 'face)
+
+(defcustom apropos-sort-by-scores nil
+ "*Non-nil means sort matches by scores; best match is shown first.
+This applies to all `apropos' commands except `apropos-documentation'.
+If value is `verbose', the computed score is shown for each match."
+ :group 'apropos
+ :type '(choice (const :tag "off" nil)
+ (const :tag "on" t)
+ (const :tag "show scores" verbose)))
+
+(defcustom apropos-documentation-sort-by-scores t
+ "*Non-nil means sort matches by scores; best match is shown first.
+This applies to `apropos-documentation' only.
+If value is `verbose', the computed score is shown for each match."
+ :group 'apropos
+ :type '(choice (const :tag "off" nil)
+ (const :tag "on" t)
+ (const :tag "show scores" verbose)))
+
+(defvar apropos-mode-map
+ (let ((map (make-sparse-keymap)))
+ (set-keymap-parent map button-buffer-map)
+ ;; Use `apropos-follow' instead of just using the button
+ ;; definition of RET, so that users can use it anywhere in an
+ ;; apropos item, not just on top of a button.
+ (define-key map "\C-m" 'apropos-follow)
+ (define-key map " " 'scroll-up)
+ (define-key map "\177" 'scroll-down)
+ (define-key map "q" 'quit-window)
+ map)
+ "Keymap used in Apropos mode.")
+
+(defvar apropos-mode-hook nil
+ "*Hook run when mode is turned on.")
+
+(defvar apropos-pattern nil
+ "Apropos pattern as entered by user.")
+
+(defvar apropos-pattern-quoted nil
+ "Apropos pattern passed through `regexp-quoute'.")
+
+(defvar apropos-words ()
+ "Current list of apropos words extracted from `apropos-pattern'.")
+
+(defvar apropos-all-words ()
+ "Current list of words and synonyms.")
+
+(defvar apropos-regexp nil
+ "Regexp used in current apropos run.")
+
+(defvar apropos-all-words-regexp nil
+ "Regexp matching apropos-all-words.")
+
+(defvar apropos-files-scanned ()
+ "List of elc files already scanned in current run of `apropos-documentation'.")
+
+(defvar apropos-accumulator ()
+ "Alist of symbols already found in current apropos run.")
+
+(defvar apropos-item ()
+ "Current item in or for `apropos-accumulator'.")
+
+(defvar apropos-synonyms '(
+ ("find" "open" "edit")
+ ("kill" "cut")
+ ("yank" "paste")
+ ("region" "selection"))
+ "List of synonyms known by apropos.
+Each element is a list of words where the first word is the standard emacs
+term, and the rest of the words are alternative terms.")
+
+\f
+;;; Button types used by apropos
+
+(define-button-type 'apropos-symbol
+ 'face apropos-symbol-face
+ 'help-echo "mouse-2, RET: Display more help on this symbol"
+ 'follow-link t
+ 'action #'apropos-symbol-button-display-help
+ 'skip t)
+
+(defun apropos-symbol-button-display-help (button)
+ "Display further help for the `apropos-symbol' button BUTTON."
+ (button-activate
+ (or (apropos-next-label-button (button-start button))
+ (error "There is nothing to follow for `%s'" (button-label button)))))
+
+(define-button-type 'apropos-function
+ 'apropos-label "Function"
+ 'help-echo "mouse-2, RET: Display more help on this function"
+ 'follow-link t
+ 'action (lambda (button)
+ (describe-function (button-get button 'apropos-symbol))))
+
+(define-button-type 'apropos-macro
+ 'apropos-label "Macro"
+ 'help-echo "mouse-2, RET: Display more help on this macro"
+ 'follow-link t
+ 'action (lambda (button)
+ (describe-function (button-get button 'apropos-symbol))))
+
+(define-button-type 'apropos-command
+ 'apropos-label "Command"
+ 'help-echo "mouse-2, RET: Display more help on this command"
+ 'follow-link t
+ 'action (lambda (button)
+ (describe-function (button-get button 'apropos-symbol))))
+
+;; We used to use `customize-variable-other-window' instead for a
+;; customizable variable, but that is slow. It is better to show an
+;; ordinary help buffer and let the user click on the customization
+;; button in that buffer, if he wants to.
+;; Likewise for `customize-face-other-window'.
+(define-button-type 'apropos-variable
+ 'apropos-label "Variable"
+ 'help-echo "mouse-2, RET: Display more help on this variable"
+ 'follow-link t
+ 'action (lambda (button)
+ (describe-variable (button-get button 'apropos-symbol))))
+
+(define-button-type 'apropos-face
+ 'apropos-label "Face"
+ 'help-echo "mouse-2, RET: Display more help on this face"
+ 'follow-link t
+ 'action (lambda (button)
+ (describe-face (button-get button 'apropos-symbol))))
+
+(define-button-type 'apropos-group
+ 'apropos-label "Group"
+ 'help-echo "mouse-2, RET: Display more help on this group"
+ 'follow-link t
+ 'action (lambda (button)
+ (customize-group-other-window
+ (button-get button 'apropos-symbol))))
+
+(define-button-type 'apropos-widget
+ 'apropos-label "Widget"
+ 'help-echo "mouse-2, RET: Display more help on this widget"
+ 'follow-link t
+ 'action (lambda (button)
+ (widget-browse-other-window (button-get button 'apropos-symbol))))
+
+(define-button-type 'apropos-plist
+ 'apropos-label "Plist"
+ 'help-echo "mouse-2, RET: Display more help on this plist"
+ 'follow-link t
+ 'action (lambda (button)
+ (apropos-describe-plist (button-get button 'apropos-symbol))))
+
+(defun apropos-next-label-button (pos)
+ "Return the next apropos label button after POS, or nil if there's none.
+Will also return nil if more than one `apropos-symbol' button is encountered
+before finding a label."
+ (let* ((button (next-button pos t))
+ (already-hit-symbol nil)
+ (label (and button (button-get button 'apropos-label)))
+ (type (and button (button-get button 'type))))
+ (while (and button
+ (not label)
+ (or (not (eq type 'apropos-symbol))
+ (not already-hit-symbol)))
+ (when (eq type 'apropos-symbol)
+ (setq already-hit-symbol t))
+ (setq button (next-button (button-start button)))
+ (when button
+ (setq label (button-get button 'apropos-label))
+ (setq type (button-get button 'type))))
+ (and label button)))
+
+\f
+(defun apropos-words-to-regexp (words wild)
+ "Make regexp matching any two of the words in WORDS."
+ (concat "\\("
+ (mapconcat 'identity words "\\|")
+ "\\)"
+ (if (cdr words)
+ (concat wild
+ "\\("
+ (mapconcat 'identity words "\\|")
+ "\\)")
+ "")))
+
+;;;###autoload
+(defun apropos-read-pattern (subject)
+ "Read an apropos pattern, either a word list or a regexp.
+Returns the user pattern, either a list of words which are matched
+literally, or a string which is used as a regexp to search for.
+
+SUBJECT is a string that is included in the prompt to identify what
+kind of objects to search."
+ (let ((pattern
+ (read-string (concat "Apropos " subject " (word list or regexp): "))))
+ (if (string-equal (regexp-quote pattern) pattern)
+ ;; Split into words
+ (split-string pattern "[ \t]+")
+ pattern)))
+
+(defun apropos-parse-pattern (pattern)
+ "Rewrite a list of words to a regexp matching all permutations.
+If PATTERN is a string, that means it is already a regexp.
+This updates variables `apropos-pattern', `apropos-pattern-quoted',
+`apropos-regexp', `apropos-words', and `apropos-all-words-regexp'."
+ (setq apropos-words nil
+ apropos-all-words nil)
+ (if (consp pattern)
+ ;; We don't actually make a regexp matching all permutations.
+ ;; Instead, for e.g. "a b c", we make a regexp matching
+ ;; any combination of two or more words like this:
+ ;; (a|b|c).*(a|b|c) which may give some false matches,
+ ;; but as long as it also gives the right ones, that's ok.
+ (let ((words pattern))
+ (setq apropos-pattern (mapconcat 'identity pattern " ")
+ apropos-pattern-quoted (regexp-quote apropos-pattern))
+ (dolist (word words)
+ (let ((syn apropos-synonyms) (s word) (a word))
+ (while syn
+ (if (member word (car syn))
+ (progn
+ (setq a (mapconcat 'identity (car syn) "\\|"))
+ (if (member word (cdr (car syn)))
+ (setq s a))
+ (setq syn nil))
+ (setq syn (cdr syn))))
+ (setq apropos-words (cons s apropos-words)
+ apropos-all-words (cons a apropos-all-words))))
+ (setq apropos-all-words-regexp
+ (apropos-words-to-regexp apropos-all-words ".+"))
+ (setq apropos-regexp
+ (apropos-words-to-regexp apropos-words ".*?")))
+ (setq apropos-pattern-quoted (regexp-quote pattern)
+ apropos-all-words-regexp pattern
+ apropos-pattern pattern
+ apropos-regexp pattern)))
+
+
+(defun apropos-calc-scores (str words)
+ "Return apropos scores for string STR matching WORDS.
+Value is a list of offsets of the words into the string."
+ (let (scores i)
+ (if words
+ (dolist (word words scores)
+ (if (setq i (string-match word str))
+ (setq scores (cons i scores))))
+ ;; Return list of start and end position of regexp
+ (and (string-match apropos-pattern str)
+ (list (match-beginning 0) (match-end 0))))))
+
+(defun apropos-score-str (str)
+ "Return apropos score for string STR."
+ (if str
+ (let* ((l (length str))
+ (score (- (/ l 10))))
+ (dolist (s (apropos-calc-scores str apropos-all-words) score)
+ (setq score (+ score 1000 (/ (* (- l s) 1000) l)))))
+ 0))
+
+(defun apropos-score-doc (doc)
+ "Return apropos score for documentation string DOC."
+ (let ((l (length doc)))
+ (if (> l 0)
+ (let ((score 0) i)
+ (when (setq i (string-match apropos-pattern-quoted doc))
+ (setq score 10000))
+ (dolist (s (apropos-calc-scores doc apropos-all-words) score)
+ (setq score (+ score 50 (/ (* (- l s) 50) l)))))
+ 0)))
+
+(defun apropos-score-symbol (symbol &optional weight)
+ "Return apropos score for SYMBOL."
+ (setq symbol (symbol-name symbol))
+ (let ((score 0)
+ (l (length symbol)))
+ (dolist (s (apropos-calc-scores symbol apropos-words) (* score (or weight 3)))
+ (setq score (+ score (- 60 l) (/ (* (- l s) 60) l))))))
+
+(defun apropos-true-hit (str words)
+ "Return t if STR is a genuine hit.
+This may fail if only one of the keywords is matched more than once.
+This requires that at least 2 keywords (unless only one was given)."
+ (or (not str)
+ (not words)
+ (not (cdr words))
+ (> (length (apropos-calc-scores str words)) 1)))
+
+(defun apropos-false-hit-symbol (symbol)
+ "Return t if SYMBOL is not really matched by the current keywords."
+ (not (apropos-true-hit (symbol-name symbol) apropos-words)))
+
+(defun apropos-false-hit-str (str)
+ "Return t if STR is not really matched by the current keywords."
+ (not (apropos-true-hit str apropos-words)))
+
+(defun apropos-true-hit-doc (doc)
+ "Return t if DOC is really matched by the current keywords."
+ (apropos-true-hit doc apropos-all-words))
+
+(define-derived-mode apropos-mode fundamental-mode "Apropos"
+ "Major mode for following hyperlinks in output of apropos commands.
+
+\\{apropos-mode-map}")
;;;###autoload
-(defun apropos (regexp &optional do-all pred no-header)
- "Show all symbols whose names contain matches for REGEXP.
-If optional argument DO-ALL is non-nil (prefix argument if interactive),
-or if `apropos-do-all' is non-nil, does more (time-consuming) work such as
-showing key bindings. Optional argument PRED is called with each symbol, and
-if it returns nil, the symbol is not shown.
+(defun apropos-variable (pattern &optional do-all)
+ "Show user variables that match PATTERN.
+PATTERN can be a word, a list of words (separated by spaces),
+or a regexp (using some regexp special characters). If it is a word,
+search for matches for that word as a substring. If it is a list of words,
+search for matches for any two (or more) of those words.
+
+With \\[universal-argument] prefix, or if `apropos-do-all' is non-nil, also show
+normal variables."
+ (interactive (list (apropos-read-pattern
+ (if (or current-prefix-arg apropos-do-all)
+ "variable" "user option"))
+ current-prefix-arg))
+ (apropos-command pattern nil
+ (if (or do-all apropos-do-all)
+ #'(lambda (symbol)
+ (and (boundp symbol)
+ (get symbol 'variable-documentation)))
+ 'user-variable-p)))
+
+;; For auld lang syne:
+;;;###autoload
+(defalias 'command-apropos 'apropos-command)
+;;;###autoload
+(defun apropos-command (pattern &optional do-all var-predicate)
+ "Show commands (interactively callable functions) that match PATTERN.
+PATTERN can be a word, a list of words (separated by spaces),
+or a regexp (using some regexp special characters). If it is a word,
+search for matches for that word as a substring. If it is a list of words,
+search for matches for any two (or more) of those words.
+
+With \\[universal-argument] prefix, or if `apropos-do-all' is non-nil, also show
+noninteractive functions.
-Optional argument NO-HEADER means don't print `Function:' or `Variable:'
-in the output.
+If VAR-PREDICATE is non-nil, show only variables, and only those that
+satisfy the predicate VAR-PREDICATE.
+
+When called from a Lisp program, a string PATTERN is used as a regexp,
+while a list of strings is used as a word list."
+ (interactive (list (apropos-read-pattern
+ (if (or current-prefix-arg apropos-do-all)
+ "command or function" "command"))
+ current-prefix-arg))
+ (apropos-parse-pattern pattern)
+ (let ((message
+ (let ((standard-output (get-buffer-create "*Apropos*")))
+ (print-help-return-message 'identity))))
+ (or do-all (setq do-all apropos-do-all))
+ (setq apropos-accumulator
+ (apropos-internal apropos-regexp
+ (or var-predicate
+ (if do-all 'functionp 'commandp))))
+ (let ((tem apropos-accumulator))
+ (while tem
+ (if (or (get (car tem) 'apropos-inhibit)
+ (apropos-false-hit-symbol (car tem)))
+ (setq apropos-accumulator (delq (car tem) apropos-accumulator)))
+ (setq tem (cdr tem))))
+ (let ((p apropos-accumulator)
+ doc symbol score)
+ (while p
+ (setcar p (list
+ (setq symbol (car p))
+ (setq score (apropos-score-symbol symbol))
+ (unless var-predicate
+ (if (functionp symbol)
+ (if (setq doc (documentation symbol t))
+ (progn
+ (setq score (+ score (apropos-score-doc doc)))
+ (substring doc 0 (string-match "\n" doc)))
+ "(not documented)")))
+ (and var-predicate
+ (funcall var-predicate symbol)
+ (if (setq doc (documentation-property
+ symbol 'variable-documentation t))
+ (progn
+ (setq score (+ score (apropos-score-doc doc)))
+ (substring doc 0
+ (string-match "\n" doc)))))))
+ (setcar (cdr (car p)) score)
+ (setq p (cdr p))))
+ (and (apropos-print t nil nil t)
+ message
+ (message "%s" message))))
+
+
+;;;###autoload
+(defun apropos-documentation-property (symbol property raw)
+ "Like (documentation-property SYMBOL PROPERTY RAW) but handle errors."
+ (condition-case ()
+ (let ((doc (documentation-property symbol property raw)))
+ (if doc (substring doc 0 (string-match "\n" doc))
+ "(not documented)"))
+ (error "(error retrieving documentation)")))
+
+
+;;;###autoload
+(defun apropos (pattern &optional do-all)
+ "Show all meaningful Lisp symbols whose names match PATTERN.
+Symbols are shown if they are defined as functions, variables, or
+faces, or if they have nonempty property lists.
+
+PATTERN can be a word, a list of words (separated by spaces),
+or a regexp (using some regexp special characters). If it is a word,
+search for matches for that word as a substring. If it is a list of words,
+search for matches for any two (or more) of those words.
+
+With \\[universal-argument] prefix, or if `apropos-do-all' is non-nil,
+consider all symbols (if they match PATTERN).
Returns list of symbols and documentation found."
- (interactive "sApropos (regexp): \nP")
- (setq do-all (or apropos-do-all do-all))
- (let ((apropos-accumulate (apropos-internal regexp pred)))
- (if (null apropos-accumulate)
- (message "No apropos matches for `%s'" regexp)
- (apropos-get-doc apropos-accumulate)
- (with-output-to-temp-buffer "*Help*"
- (apropos-print-matches apropos-accumulate regexp nil
- do-all no-header)))
- apropos-accumulate))
-
-;; Takes LIST of symbols and adds documentation. Modifies LIST in place.
-;; Resulting alist is of form ((symbol fn-doc var-doc) ...). Should only be
-;; called by apropos. Returns LIST.
-
-(defun apropos-get-doc (list)
- (let ((p list)
- fn-doc var-doc symbol)
- (while (consp p)
- (setq symbol (car p)
- fn-doc (and (fboundp symbol)
- (documentation symbol))
- var-doc (documentation-property symbol 'variable-documentation)
- fn-doc (and fn-doc
- (substring fn-doc 0 (string-match "\n" fn-doc)))
- var-doc (and var-doc
- (substring var-doc 0 (string-match "\n" var-doc))))
- (setcar p (list symbol fn-doc var-doc))
- (setq p (cdr p)))
- list))
-
-;; Variables bound by super-apropos and used by its subroutines.
-;; It would be good to say what each one is for, but I don't know -- rms.
-(defvar apropos-item)
-(defvar apropos-var-doc)
-(defvar apropos-fn-doc)
-(defvar apropos-accumulate)
-(defvar apropos-regexp
- "Within `super-apropos', this holds the REGEXP argument.")
+ (interactive (list (apropos-read-pattern "symbol")
+ current-prefix-arg))
+ (apropos-parse-pattern pattern)
+ (apropos-symbols-internal
+ (apropos-internal apropos-regexp
+ (and (not do-all)
+ (not apropos-do-all)
+ (lambda (symbol)
+ (or (fboundp symbol)
+ (boundp symbol)
+ (facep symbol)
+ (symbol-plist symbol)))))
+ (or do-all apropos-do-all)))
+
+(defun apropos-symbols-internal (symbols keys &optional text)
+ ;; Filter out entries that are marked as apropos-inhibit.
+ (let ((all nil))
+ (dolist (symbol symbols)
+ (unless (get symbol 'apropos-inhibit)
+ (push symbol all)))
+ (setq symbols all))
+ (let ((apropos-accumulator
+ (mapcar
+ (lambda (symbol)
+ (let (doc properties)
+ (list
+ symbol
+ (apropos-score-symbol symbol)
+ (when (fboundp symbol)
+ (if (setq doc (condition-case nil
+ (documentation symbol t)
+ (void-function
+ "(alias for undefined function)")
+ (error
+ "(can't retrieve function documentation)")))
+ (substring doc 0 (string-match "\n" doc))
+ "(not documented)"))
+ (when (boundp symbol)
+ (apropos-documentation-property
+ symbol 'variable-documentation t))
+ (when (setq properties (symbol-plist symbol))
+ (setq doc (list (car properties)))
+ (while (setq properties (cdr (cdr properties)))
+ (setq doc (cons (car properties) doc)))
+ (mapconcat #'symbol-name (nreverse doc) " "))
+ (when (get symbol 'widget-type)
+ (apropos-documentation-property
+ symbol 'widget-documentation t))
+ (when (facep symbol)
+ (apropos-documentation-property
+ symbol 'face-documentation t))
+ (when (get symbol 'custom-group)
+ (apropos-documentation-property
+ symbol 'group-documentation t)))))
+ symbols)))
+ (apropos-print keys nil text)))
+
+
+;;;###autoload
+(defun apropos-value (pattern &optional do-all)
+ "Show all symbols whose value's printed representation matches PATTERN.
+PATTERN can be a word, a list of words (separated by spaces),
+or a regexp (using some regexp special characters). If it is a word,
+search for matches for that word as a substring. If it is a list of words,
+search for matches for any two (or more) of those words.
+
+With \\[universal-argument] prefix, or if `apropos-do-all' is non-nil, also looks
+at the function and at the names and values of properties.
+Returns list of symbols and values found."
+ (interactive (list (apropos-read-pattern "value")
+ current-prefix-arg))
+ (apropos-parse-pattern pattern)
+ (or do-all (setq do-all apropos-do-all))
+ (setq apropos-accumulator ())
+ (let (f v p)
+ (mapatoms
+ (lambda (symbol)
+ (setq f nil v nil p nil)
+ (or (memq symbol '(apropos-regexp
+ apropos-pattern apropos-all-words-regexp
+ apropos-words apropos-all-words
+ do-all apropos-accumulator
+ symbol f v p))
+ (setq v (apropos-value-internal 'boundp symbol 'symbol-value)))
+ (if do-all
+ (setq f (apropos-value-internal 'fboundp symbol 'symbol-function)
+ p (apropos-format-plist symbol "\n " t)))
+ (if (apropos-false-hit-str v)
+ (setq v nil))
+ (if (apropos-false-hit-str f)
+ (setq f nil))
+ (if (apropos-false-hit-str p)
+ (setq p nil))
+ (if (or f v p)
+ (setq apropos-accumulator (cons (list symbol
+ (+ (apropos-score-str f)
+ (apropos-score-str v)
+ (apropos-score-str p))
+ f v p)
+ apropos-accumulator))))))
+ (apropos-print nil "\n----------------\n"))
+
;;;###autoload
-(defun super-apropos (regexp &optional do-all)
- "Show symbols whose names/documentation contain matches for REGEXP.
-If optional argument DO-ALL is non-nil (prefix argument if interactive),
-or if `apropos-do-all' is non-nil, does more (time-consuming) work such as
-showing key bindings and documentation that is not stored in the documentation
-file.
+(defun apropos-documentation (pattern &optional do-all)
+ "Show symbols whose documentation contains matches for PATTERN.
+PATTERN can be a word, a list of words (separated by spaces),
+or a regexp (using some regexp special characters). If it is a word,
+search for matches for that word as a substring. If it is a list of words,
+search for matches for any two (or more) of those words.
+With \\[universal-argument] prefix, or if `apropos-do-all' is non-nil, also use
+documentation that is not stored in the documentation file and show key
+bindings.
Returns list of symbols and documentation found."
- (interactive "sSuper Apropos: \nP")
- (setq do-all (or apropos-do-all do-all))
- (let ((apropos-regexp regexp)
- apropos-accumulate apropos-fn-doc apropos-var-doc apropos-item)
- (setq apropos-accumulate (super-apropos-check-doc-file apropos-regexp))
- (if (null apropos-accumulate)
- (message "No apropos matches for `%s'" apropos-regexp)
- (if do-all (mapatoms 'super-apropos-accumulate))
- (with-output-to-temp-buffer "*Help*"
- (apropos-print-matches apropos-accumulate nil t do-all)))
- apropos-accumulate))
-
-;; Finds all documentation related to REGEXP in internal-doc-file-name.
-;; Returns an alist of form ((symbol fn-doc var-doc) ...).
-
-(defun super-apropos-check-doc-file (regexp)
- (let* ((doc-file (concat doc-directory internal-doc-file-name))
- (doc-buffer
- ;; Force fundamental mode for the DOC file.
- (let (auto-mode-alist)
- (find-file-noselect doc-file t)))
- type symbol doc sym-list)
- (save-excursion
- (set-buffer doc-buffer)
- ;; a user said he might accidentally edit the doc file
- (setq buffer-read-only t)
- (bury-buffer doc-buffer)
- (goto-char (point-min))
- (while (re-search-forward regexp nil t)
- (search-backward "\C-_")
- (setq type (if (eq ?F (char-after (1+ (point))))
- 1 ;function documentation
- 2) ;variable documentation
- symbol (progn
- (forward-char 2)
- (read doc-buffer))
- doc (buffer-substring
- (point)
- (progn
- (if (search-forward "\C-_" nil 'move)
- (1- (point))
- (point))))
- apropos-item (assq symbol sym-list))
- (and (if (= type 1)
- (and (fboundp symbol) (documentation symbol))
- (documentation-property symbol 'variable-documentation))
- (or apropos-item
- (setq apropos-item (list symbol nil nil)
- sym-list (cons apropos-item sym-list)))
- (setcar (nthcdr type apropos-item) doc))))
- sym-list))
-
-;; This is passed as the argument to map-atoms, so it is called once for every
-;; symbol in obarray. Takes one argument SYMBOL, and finds any memory-resident
-;; documentation on that symbol if it matches a variable regexp.
-
-(defun super-apropos-accumulate (symbol)
- (cond ((string-match apropos-regexp (symbol-name symbol))
- (setq apropos-item (apropos-get-accum-item symbol))
- (setcar (cdr apropos-item) (or (safe-documentation symbol)
- (nth 1 apropos-item)))
- (setcar (nthcdr 2 apropos-item) (or (safe-documentation-property symbol)
- (nth 2 apropos-item))))
- (t
- (and (setq apropos-fn-doc (safe-documentation symbol))
- (string-match apropos-regexp apropos-fn-doc)
- (setcar (cdr (apropos-get-accum-item symbol)) apropos-fn-doc))
- (and (setq apropos-var-doc (safe-documentation-property symbol))
- (string-match apropos-regexp apropos-var-doc)
- (setcar (nthcdr 2 (apropos-get-accum-item symbol))
- apropos-var-doc))))
- nil)
-
-;; Prints the symbols and documentation in alist MATCHES of form ((symbol
-;; fn-doc var-doc) ...). Uses optional argument REGEXP to speed up searching
-;; for keybindings. The names of all symbols in MATCHES must match REGEXP.
-;; Displays in the buffer pointed to by standard-output. Optional argument
-;; SPACING means put blank lines in between each symbol's documentation.
-;; Optional argument DO-ALL means do more time-consuming work, specifically,
-;; consulting key bindings. Should only be called within a
-;; with-output-to-temp-buffer.
-
-(defun apropos-print-matches (matches &optional regexp
- spacing do-all no-header)
- (setq matches (sort matches (function
- (lambda (a b)
- (string-lessp (car a) (car b))))))
- (let ((p matches)
- (old-buffer (current-buffer))
- item keys-done symbol tem)
- (save-excursion
- (set-buffer standard-output)
- (or matches (princ "No matches found."))
- (while (consp p)
- (setq item (car p)
- symbol (car item)
- p (cdr p))
- (or (not spacing) (bobp) (terpri))
- (princ symbol) ;print symbol name
- ;; don't calculate key-bindings unless needed
- (cond ((and do-all (commandp symbol) (not keys-done))
- (save-excursion
- (set-buffer old-buffer)
- (apropos-match-keys matches regexp))
- (setq keys-done t)))
- (cond ((and do-all
- (or (setq tem (nthcdr 3 item))
- (commandp symbol)))
- (indent-to 30 1)
- (if tem
- (princ (mapconcat 'key-description tem ", "))
- (princ "(not bound to any keys)"))))
- (terpri)
- (cond ((setq tem (nth 1 item))
- (let ((substed (if do-all (substitute-command-keys tem) tem)))
- (if no-header
- (princ " ")
- (princ " Function: ")
- (if (> (length substed) 67)
- (princ "\n ")))
- (princ substed))))
- (or (bolp) (terpri))
- (cond ((setq tem (nth 2 item))
- (let ((substed (if do-all (substitute-command-keys tem) tem)))
- (if no-header
- (princ " ")
- (princ " Variable: ")
- (if (> (length substed) 67)
- (princ "\n ")))
- (princ substed))))
- (or (bolp) (terpri)))
- (help-mode)))
- t)
-
-;; Find key bindings for symbols that are cars in ALIST. Optionally, first
-;; match the symbol name against REGEXP. Modifies ALIST in place. Each key
-;; binding is added as a string to the end of the list in ALIST whose car is
-;; the corresponding symbol. The pointer to ALIST is returned.
-
-(defun apropos-match-keys (alist &optional regexp)
- (let* ((current-local-map (current-local-map))
- ;; Get a list of the top-level maps now active.
- (top-maps
- (if overriding-local-map
- (list overriding-local-map (current-global-map))
- (append (current-minor-mode-maps)
- (if current-local-map
- (list current-local-map (current-global-map))
- (list (current-global-map))))))
- ;; Turn that into a list of all the maps including submaps.
- (maps (apply 'append (mapcar 'accessible-keymaps top-maps)))
- map ;map we are now inspecting
- sequence ;key sequence to reach map
- i ;index into vector map
- command ;what is bound to current keys
- key ;last key to reach command
- local ;local binding for sequence + key
- item) ;symbol data item in alist
- ;; examine all reachable keymaps
- (while (consp maps)
- (setq map (cdr (car maps))
- sequence (car (car maps)) ;keys to reach this map
- maps (cdr maps))
- ;; Skip the leading `keymap', doc string, etc.
- (if (eq (car map) 'keymap)
- (setq map (cdr map)))
- (while (stringp (car-safe map))
- (setq map (cdr map)))
-
- (while (consp map)
- (cond ((consp (car map))
- (setq command (cdr (car map))
- key (car (car map)))
- ;; Skip any menu prompt and help string in this key binding.
- (while (and (consp command) (stringp (car command)))
- (setq command (cdr command)))
- ;; Skip any cached equivalent key.
- (and (consp command)
- (consp (car command))
- (setq command (cdr command)))
- ;; if is a symbol, and matches optional regexp, and is a car
- ;; in alist, and is not shadowed by a different local binding,
- ;; record it
- (and (symbolp command)
- (if regexp
- (string-match regexp (symbol-name command))
- t)
- (setq item (assq command alist))
- (if (or (vectorp sequence) (not (integerp key)))
- (setq key (vconcat sequence (vector key)))
- (setq key (concat sequence (char-to-string key))))
- ;; checking if shadowed by local binding.
- ;; either no local map, no local binding, or runs off the
- ;; binding tree (number), or is the same binding
- (or (not current-local-map)
- (not (setq local (lookup-key current-local-map key)))
- (numberp local)
- (eq command local))
- ;; check if this binding is already recorded
- ;; (this can happen due to inherited keymaps)
- (not (member key (nthcdr 3 item)))
- ;; add this key binding to the item in alist
- (nconc item (cons key nil))))
- ((vectorp (car map))
- (let ((i 0)
- (vec (car map))
- (len (length (car map))))
- (while (< i len)
- (setq command (aref vec i))
- (setq key i)
- ;; Skip any menu prompt in this key binding.
- (and (consp command) (symbolp (cdr command))
- (setq command (cdr command)))
- ;; This is the same as the code in the previous case.
- (and (symbolp command)
- (if regexp
- (string-match regexp (symbol-name command))
- t)
- (setq item (assq command alist))
- (if (or (vectorp sequence) (not (integerp key)))
- (setq key (vconcat sequence (vector key)))
- (setq key (concat sequence (char-to-string key))))
- ;; checking if shadowed by local binding.
- ;; either no local map, no local binding, or runs off the
- ;; binding tree (number), or is the same binding
- (or (not current-local-map)
- (not (setq local (lookup-key current-local-map key)))
- (numberp local)
- (eq command local))
- ;; check if this binding is already recorded
- ;; (this can happen due to inherited keymaps)
- (not (member key (nthcdr 3 item)))
- ;; add this key binding to the item in alist
- (nconc item (cons key nil)))
- (setq i (1+ i))))))
- (setq map (cdr map)))))
- alist)
-
-;; Get an alist item in alist apropos-accumulate whose car is SYMBOL. Creates
-;; the item if not already present. Modifies apropos-accumulate in place.
-
-(defun apropos-get-accum-item (symbol)
- (or (assq symbol apropos-accumulate)
+ (interactive (list (apropos-read-pattern "documentation")
+ current-prefix-arg))
+ (apropos-parse-pattern pattern)
+ (or do-all (setq do-all apropos-do-all))
+ (setq apropos-accumulator () apropos-files-scanned ())
+ (let ((standard-input (get-buffer-create " apropos-temp"))
+ (apropos-sort-by-scores apropos-documentation-sort-by-scores)
+ f v sf sv)
+ (unwind-protect
+ (save-excursion
+ (set-buffer standard-input)
+ (apropos-documentation-check-doc-file)
+ (if do-all
+ (mapatoms
+ (lambda (symbol)
+ (setq f (apropos-safe-documentation symbol)
+ v (get symbol 'variable-documentation))
+ (if (integerp v) (setq v))
+ (setq f (apropos-documentation-internal f)
+ v (apropos-documentation-internal v))
+ (setq sf (apropos-score-doc f)
+ sv (apropos-score-doc v))
+ (if (or f v)
+ (if (setq apropos-item
+ (cdr (assq symbol apropos-accumulator)))
+ (progn
+ (if f
+ (progn
+ (setcar (nthcdr 1 apropos-item) f)
+ (setcar apropos-item (+ (car apropos-item) sf))))
+ (if v
+ (progn
+ (setcar (nthcdr 2 apropos-item) v)
+ (setcar apropos-item (+ (car apropos-item) sv)))))
+ (setq apropos-accumulator
+ (cons (list symbol
+ (+ (apropos-score-symbol symbol 2) sf sv)
+ f v)
+ apropos-accumulator)))))))
+ (apropos-print nil "\n----------------\n" nil t))
+ (kill-buffer standard-input))))
+
+\f
+(defun apropos-value-internal (predicate symbol function)
+ (if (funcall predicate symbol)
(progn
- (setq apropos-accumulate
- (cons (list symbol nil nil) apropos-accumulate))
- (assq symbol apropos-accumulate))))
+ (setq symbol (prin1-to-string (funcall function symbol)))
+ (if (string-match apropos-regexp symbol)
+ (progn
+ (if apropos-match-face
+ (put-text-property (match-beginning 0) (match-end 0)
+ 'face apropos-match-face
+ symbol))
+ symbol)))))
+
+(defun apropos-documentation-internal (doc)
+ (if (consp doc)
+ (apropos-documentation-check-elc-file (car doc))
+ (if (and doc
+ (string-match apropos-all-words-regexp doc)
+ (apropos-true-hit-doc doc))
+ (when apropos-match-face
+ (setq doc (substitute-command-keys (copy-sequence doc)))
+ (if (or (string-match apropos-pattern-quoted doc)
+ (string-match apropos-all-words-regexp doc))
+ (put-text-property (match-beginning 0)
+ (match-end 0)
+ 'face apropos-match-face doc))
+ doc))))
-(defun safe-documentation (function)
- "Like documentation, except it avoids calling `get_doc_string'.
+(defun apropos-format-plist (pl sep &optional compare)
+ (setq pl (symbol-plist pl))
+ (let (p p-out)
+ (while pl
+ (setq p (format "%s %S" (car pl) (nth 1 pl)))
+ (if (or (not compare) (string-match apropos-regexp p))
+ (if apropos-property-face
+ (put-text-property 0 (length (symbol-name (car pl)))
+ 'face apropos-property-face p))
+ (setq p nil))
+ (if p
+ (progn
+ (and compare apropos-match-face
+ (put-text-property (match-beginning 0) (match-end 0)
+ 'face apropos-match-face
+ p))
+ (setq p-out (concat p-out (if p-out sep) p))))
+ (setq pl (nthcdr 2 pl)))
+ p-out))
+
+
+;; Finds all documentation related to APROPOS-REGEXP in internal-doc-file-name.
+
+(defun apropos-documentation-check-doc-file ()
+ (let (type symbol (sepa 2) sepb)
+ (insert ?\^_)
+ (backward-char)
+ (insert-file-contents (concat doc-directory internal-doc-file-name))
+ (forward-char)
+ (while (save-excursion
+ (setq sepb (search-forward "\^_"))
+ (not (eobp)))
+ (beginning-of-line 2)
+ (if (save-restriction
+ (narrow-to-region (point) (1- sepb))
+ (re-search-forward apropos-all-words-regexp nil t))
+ (progn
+ (goto-char (1+ sepa))
+ (setq type (if (eq ?F (preceding-char))
+ 2 ; function documentation
+ 3) ; variable documentation
+ symbol (read)
+ doc (buffer-substring (1+ (point)) (1- sepb)))
+ (when (apropos-true-hit-doc doc)
+ (or (and (setq apropos-item (assq symbol apropos-accumulator))
+ (setcar (cdr apropos-item)
+ (apropos-score-doc doc)))
+ (setq apropos-item (list symbol
+ (+ (apropos-score-symbol symbol 2)
+ (apropos-score-doc doc))
+ nil nil)
+ apropos-accumulator (cons apropos-item
+ apropos-accumulator)))
+ (when apropos-match-face
+ (setq doc (substitute-command-keys doc))
+ (if (or (string-match apropos-pattern-quoted doc)
+ (string-match apropos-all-words-regexp doc))
+ (put-text-property (match-beginning 0)
+ (match-end 0)
+ 'face apropos-match-face doc)))
+ (setcar (nthcdr type apropos-item) doc))))
+ (setq sepa (goto-char sepb)))))
+
+(defun apropos-documentation-check-elc-file (file)
+ (if (member file apropos-files-scanned)
+ nil
+ (let (symbol doc beg end this-is-a-variable)
+ (setq apropos-files-scanned (cons file apropos-files-scanned))
+ (erase-buffer)
+ (insert-file-contents file)
+ (while (search-forward "\n#@" nil t)
+ ;; Read the comment length, and advance over it.
+ (setq end (read)
+ beg (1+ (point))
+ end (+ (point) end -1))
+ (forward-char)
+ (if (save-restriction
+ ;; match ^ and $ relative to doc string
+ (narrow-to-region beg end)
+ (re-search-forward apropos-all-words-regexp nil t))
+ (progn
+ (goto-char (+ end 2))
+ (setq doc (buffer-substring beg end)
+ end (- (match-end 0) beg)
+ beg (- (match-beginning 0) beg))
+ (when (apropos-true-hit-doc doc)
+ (setq this-is-a-variable (looking-at "(def\\(var\\|const\\) ")
+ symbol (progn
+ (skip-chars-forward "(a-z")
+ (forward-char)
+ (read))
+ symbol (if (consp symbol)
+ (nth 1 symbol)
+ symbol))
+ (if (if this-is-a-variable
+ (get symbol 'variable-documentation)
+ (and (fboundp symbol) (apropos-safe-documentation symbol)))
+ (progn
+ (or (and (setq apropos-item (assq symbol apropos-accumulator))
+ (setcar (cdr apropos-item)
+ (+ (cadr apropos-item) (apropos-score-doc doc))))
+ (setq apropos-item (list symbol
+ (+ (apropos-score-symbol symbol 2)
+ (apropos-score-doc doc))
+ nil nil)
+ apropos-accumulator (cons apropos-item
+ apropos-accumulator)))
+ (when apropos-match-face
+ (setq doc (substitute-command-keys doc))
+ (if (or (string-match apropos-pattern-quoted doc)
+ (string-match apropos-all-words-regexp doc))
+ (put-text-property (match-beginning 0)
+ (match-end 0)
+ 'face apropos-match-face doc)))
+ (setcar (nthcdr (if this-is-a-variable 3 2)
+ apropos-item)
+ doc))))))))))
+
+
+
+(defun apropos-safe-documentation (function)
+ "Like `documentation', except it avoids calling `get_doc_string'.
Will return nil instead."
- (while (symbolp function)
+ (while (and function (symbolp function))
(setq function (if (fboundp function)
- (symbol-function function)
- 0)))
+ (symbol-function function))))
(if (eq (car-safe function) 'macro)
(setq function (cdr function)))
- (if (not (consp function))
- nil
- (if (not (memq (car function) '(lambda autoload)))
- nil
- (setq function (nth 2 function))
- (if (stringp function)
- function
- nil))))
-
-(defun safe-documentation-property (symbol)
- "Like documentation-property, except it avoids calling `get_doc_string'.
-Will return nil instead."
- (setq symbol (get symbol 'variable-documentation))
- (if (numberp symbol)
+ (setq function (if (byte-code-function-p function)
+ (if (> (length function) 4)
+ (aref function 4))
+ (if (eq (car-safe function) 'autoload)
+ (nth 2 function)
+ (if (eq (car-safe function) 'lambda)
+ (if (stringp (nth 2 function))
+ (nth 2 function)
+ (if (stringp (nth 3 function))
+ (nth 3 function)))))))
+ (if (integerp function)
nil
- symbol))
+ function))
+
+
+(defun apropos-print (do-keys spacing &optional text nosubst)
+ "Output result of apropos searching into buffer `*Apropos*'.
+The value of `apropos-accumulator' is the list of items to output.
+Each element should have the format
+ (SYMBOL SCORE FN-DOC VAR-DOC [PLIST-DOC WIDGET-DOC FACE-DOC GROUP-DOC]).
+The return value is the list that was in `apropos-accumulator', sorted
+alphabetically by symbol name; but this function also sets
+`apropos-accumulator' to nil before returning.
+
+If SPACING is non-nil, it should be a string; separate items with that string.
+If non-nil TEXT is a string that will be printed as a heading."
+ (if (null apropos-accumulator)
+ (message "No apropos matches for `%s'" apropos-pattern)
+ (setq apropos-accumulator
+ (sort apropos-accumulator
+ (lambda (a b)
+ ;; Don't sort by score if user can't see the score.
+ ;; It would be confusing. -- rms.
+ (if apropos-sort-by-scores
+ (or (> (cadr a) (cadr b))
+ (and (= (cadr a) (cadr b))
+ (string-lessp (car a) (car b))))
+ (string-lessp (car a) (car b))))))
+ (with-output-to-temp-buffer "*Apropos*"
+ (let ((p apropos-accumulator)
+ (old-buffer (current-buffer))
+ symbol item)
+ (set-buffer standard-output)
+ (apropos-mode)
+ (if (display-mouse-p)
+ (insert
+ "If moving the mouse over text changes the text's color, "
+ "you can click\n"
+ "mouse-2 (second button from right) on that text to "
+ "get more information.\n"))
+ (insert "In this buffer, go to the name of the command, or function,"
+ " or variable,\n"
+ (substitute-command-keys
+ "and type \\[apropos-follow] to get full documentation.\n\n"))
+ (if text (insert text "\n\n"))
+ (while (consp p)
+ (when (and spacing (not (bobp)))
+ (princ spacing))
+ (setq apropos-item (car p)
+ symbol (car apropos-item)
+ p (cdr p))
+ ;; Insert dummy score element for backwards compatibility with 21.x
+ ;; apropos-item format.
+ (if (not (numberp (cadr apropos-item)))
+ (setq apropos-item
+ (cons (car apropos-item)
+ (cons nil (cdr apropos-item)))))
+ (insert-text-button (symbol-name symbol)
+ 'type 'apropos-symbol
+ ;; Can't use default, since user may have
+ ;; changed the variable!
+ ;; Just say `no' to variables containing faces!
+ 'face apropos-symbol-face)
+ (if (and (eq apropos-sort-by-scores 'verbose)
+ (cadr apropos-item))
+ (insert " (" (number-to-string (cadr apropos-item)) ") "))
+ ;; Calculate key-bindings if we want them.
+ (and do-keys
+ (commandp symbol)
+ (not (eq symbol 'self-insert-command))
+ (indent-to 30 1)
+ (if (let ((keys
+ (save-excursion
+ (set-buffer old-buffer)
+ (where-is-internal symbol)))
+ filtered)
+ ;; Copy over the list of key sequences,
+ ;; omitting any that contain a buffer or a frame.
+ (while keys
+ (let ((key (car keys))
+ (i 0)
+ loser)
+ (while (< i (length key))
+ (if (or (framep (aref key i))
+ (bufferp (aref key i)))
+ (setq loser t))
+ (setq i (1+ i)))
+ (or loser
+ (setq filtered (cons key filtered))))
+ (setq keys (cdr keys)))
+ (setq item filtered))
+ ;; Convert the remaining keys to a string and insert.
+ (insert
+ (mapconcat
+ (lambda (key)
+ (setq key (condition-case ()
+ (key-description key)
+ (error)))
+ (if apropos-keybinding-face
+ (put-text-property 0 (length key)
+ 'face apropos-keybinding-face
+ key))
+ key)
+ item ", "))
+ (insert "M-x ... RET")
+ (when apropos-keybinding-face
+ (put-text-property (- (point) 11) (- (point) 8)
+ 'face apropos-keybinding-face)
+ (put-text-property (- (point) 3) (point)
+ 'face apropos-keybinding-face))))
+ (terpri)
+ (apropos-print-doc 2
+ (if (commandp symbol)
+ 'apropos-command
+ (if (apropos-macrop symbol)
+ 'apropos-macro
+ 'apropos-function))
+ (not nosubst))
+ (apropos-print-doc 3 'apropos-variable (not nosubst))
+ (apropos-print-doc 7 'apropos-group t)
+ (apropos-print-doc 6 'apropos-face t)
+ (apropos-print-doc 5 'apropos-widget t)
+ (apropos-print-doc 4 'apropos-plist nil))
+ (setq buffer-read-only t))))
+ (prog1 apropos-accumulator
+ (setq apropos-accumulator ()))) ; permit gc
+
+
+(defun apropos-macrop (symbol)
+ "Return t if SYMBOL is a Lisp macro."
+ (and (fboundp symbol)
+ (consp (setq symbol
+ (symbol-function symbol)))
+ (or (eq (car symbol) 'macro)
+ (if (eq (car symbol) 'autoload)
+ (memq (nth 4 symbol)
+ '(macro t))))))
+
+
+(defun apropos-print-doc (i type do-keys)
+ (if (stringp (setq i (nth i apropos-item)))
+ (progn
+ (insert " ")
+ (insert-text-button (button-type-get type 'apropos-label)
+ 'type type
+ ;; Can't use the default button face, since
+ ;; user may have changed the variable!
+ ;; Just say `no' to variables containing faces!
+ 'face apropos-label-face
+ 'apropos-symbol (car apropos-item))
+ (insert ": ")
+ (insert (if do-keys (substitute-command-keys i) i))
+ (or (bolp) (terpri)))))
+
+
+(defun apropos-follow ()
+ "Invokes any button at point, otherwise invokes the nearest label button."
+ (interactive)
+ (button-activate
+ (or (apropos-next-label-button (line-beginning-position))
+ (error "There is nothing to follow here"))))
+
+
+(defun apropos-describe-plist (symbol)
+ "Display a pretty listing of SYMBOL's plist."
+ (help-setup-xref (list 'apropos-describe-plist symbol) (interactive-p))
+ (with-output-to-temp-buffer (help-buffer)
+ (set-buffer standard-output)
+ (princ "Symbol ")
+ (prin1 symbol)
+ (princ "'s plist is\n (")
+ (if apropos-symbol-face
+ (put-text-property (+ (point-min) 7) (- (point) 14)
+ 'face apropos-symbol-face))
+ (insert (apropos-format-plist symbol "\n "))
+ (princ ")")
+ (print-help-return-message)))
+
+
+(provide 'apropos)
+;;; arch-tag: d56fa2ac-e56b-4ce3-84ff-852f9c0dc66e
;;; apropos.el ends here