;;; apropos.el --- apropos commands for users and programmers
-;; Copyright (C) 1989, 1994, 1995 Free Software Foundation, Inc.
+;; Copyright (C) 1989, 1994, 1995, 2001, 2002, 2003 Free Software Foundation, Inc.
;; Author: Joe Wells <jbw@bigbird.bu.edu>
;; Rewritten: Daniel Pfeiffer <occitan@esperanto.org>
;;; Code:
+(require 'button)
+
(defgroup apropos nil
"Apropos commands for users and programmers"
:group 'help
:group 'apropos
:type 'face)
+(defcustom apropos-sort-by-scores nil
+ "*Non-nil means sort matches by scores; best match is shown first.
+The computed score is shown for each match."
+ :group 'apropos
+ :type 'boolean)
(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)
- (define-key map [mouse-2] 'apropos-mouse-follow)
- (define-key map [down-mouse-2] nil)
map)
"Keymap used in Apropos mode.")
(defvar apropos-regexp nil
"Regexp used in current apropos run.")
+(defvar apropos-orig-regexp nil
+ "Regexp as entered by user.")
+
+(defvar apropos-all-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-item ()
"Current item in or for `apropos-accumulator'.")
+
+(defvar apropos-synonyms '(
+ ("find" "open" "edit")
+ ("kill" "cut")
+ ("yank" "paste"))
+ "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.")
+
+(defvar apropos-words ()
+ "Current list of words.")
+
+(defvar apropos-all-words ()
+ "Current list of words and synonyms.")
+
+\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"
+ '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"
+ 'action (lambda (button)
+ (describe-function (button-get button 'apropos-symbol)))
+ 'help-echo "mouse-2, RET: Display more help on this function")
+(define-button-type 'apropos-macro
+ 'apropos-label "Macro"
+ 'action (lambda (button)
+ (describe-function (button-get button 'apropos-symbol)))
+ 'help-echo "mouse-2, RET: Display more help on this macro")
+(define-button-type 'apropos-command
+ 'apropos-label "Command"
+ 'action (lambda (button)
+ (describe-function (button-get button 'apropos-symbol)))
+ 'help-echo "mouse-2, RET: Display more help on this command")
+
+;; 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"
+ '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"
+ '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"
+ '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"
+ '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"
+ '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 "\\|")
+ "\\)")
+ "")))
+
+(defun apropos-rewrite-regexp (regexp)
+ "Rewrite a list of words to a regexp matching all permutations.
+If REGEXP is already a regexp, don't modify it."
+ (setq apropos-orig-regexp regexp)
+ (setq apropos-words () apropos-all-words ())
+ (if (string-equal (regexp-quote regexp) regexp)
+ ;; 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 (split-string regexp "[ \t]+")))
+ (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-regexp (apropos-words-to-regexp apropos-all-words ".+"))
+ (apropos-words-to-regexp apropos-words ".*?"))
+ (setq apropos-all-regexp regexp)))
+
+(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
+ (string-match apropos-regexp 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)))
+ i)
+ (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."
+ (if doc
+ (let ((score 0)
+ (l (length doc))
+ i)
+ (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))
+ i)
+ (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))
+
;;;###autoload
(define-derived-mode apropos-mode fundamental-mode "Apropos"
"Major mode for following hyperlinks in output of apropos commands.
(if (or current-prefix-arg apropos-do-all)
"variable"
"user option")
- " (regexp): "))
+ " (regexp or words): "))
current-prefix-arg))
(apropos-command regexp nil
(if (or do-all apropos-do-all)
;; For auld lang syne:
;;;###autoload
-(fset 'command-apropos 'apropos-command)
+(defalias 'command-apropos 'apropos-command)
;;;###autoload
(defun apropos-command (apropos-regexp &optional do-all var-predicate)
"Show commands (interactively callable functions) that match APROPOS-REGEXP.
(if (or current-prefix-arg
apropos-do-all)
"or function ")
- "(regexp): "))
+ "(regexp or words): "))
current-prefix-arg))
+ (setq apropos-regexp (apropos-rewrite-regexp apropos-regexp))
(let ((message
(let ((standard-output (get-buffer-create "*Apropos*")))
(print-help-return-message 'identity))))
(if do-all 'functionp 'commandp))))
(let ((tem apropos-accumulator))
(while tem
- (if (get (car tem) 'apropos-inhibit)
+ (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)
+ 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))
- (substring doc 0 (string-match "\n" doc))
+ (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))
- (substring doc 0
- (string-match "\n" doc))))))
+ (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)
message
(message 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 (apropos-regexp &optional do-all)
"Show all bound symbols whose names match APROPOS-REGEXP.
With optional prefix DO-ALL or if `apropos-do-all' is non-nil, also
show unbound symbols and key bindings, which is a little more
time-consuming. Returns list of symbols and documentation found."
- (interactive "sApropos symbol (regexp): \nP")
+ (interactive "sApropos symbol (regexp or words): \nP")
+ (setq apropos-regexp (apropos-rewrite-regexp apropos-regexp))
(setq apropos-accumulator
(apropos-internal apropos-regexp
(and (not do-all)
(while p
(setcar p (list
(setq symbol (car p))
+ (apropos-score-symbol symbol)
(when (fboundp symbol)
(if (setq doc (condition-case nil
(documentation symbol t)
(void-function
- "(alias for undefined function)")))
+ "(alias for undefined function)")
+ (error
+ "(error retrieving function documentation)")))
(substring doc 0 (string-match "\n" doc))
"(not documented)"))
(when (boundp symbol)
- (if (setq doc (documentation-property
- symbol 'variable-documentation t))
- (substring doc 0 (string-match "\n" doc))
- "(not documented)"))
+ (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)
- (if (setq doc (documentation-property
- symbol 'widget-documentation t))
- (substring doc 0
- (string-match "\n" doc))
- "(not documented)"))
+ (apropos-documentation-property
+ symbol 'widget-documentation t))
(when (facep symbol)
- (if (setq doc (documentation-property
- symbol 'face-documentation t))
- (substring doc 0
- (string-match "\n" doc))
- "(not documented)"))
+ (apropos-documentation-property
+ symbol 'face-documentation t))
(when (get symbol 'custom-group)
- (if (setq doc (documentation-property
- symbol 'group-documentation t))
- (substring doc 0
- (string-match "\n" doc))
- "(not documented)"))))
+ (apropos-documentation-property
+ symbol 'group-documentation t))))
(setq p (cdr p))))
(apropos-print
(or do-all apropos-do-all)
With optional prefix DO-ALL 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 "sApropos value (regexp): \nP")
+ (interactive "sApropos value (regexp or words): \nP")
+ (setq apropos-regexp (apropos-rewrite-regexp apropos-regexp))
(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 do-all apropos-accumulator
- symbol f v p))
+ (or (memq symbol '(apropos-regexp
+ apropos-orig-regexp apropos-all-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 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 t))
+ (apropos-print nil "\n----------------\n"))
;;;###autoload
documentation that is not stored in the documentation file and show key
bindings.
Returns list of symbols and documentation found."
- (interactive "sApropos documentation (regexp): \nP")
+ (interactive "sApropos documentation (regexp or words): \nP")
+ (setq apropos-regexp (apropos-rewrite-regexp apropos-regexp))
(or do-all (setq do-all apropos-do-all))
(setq apropos-accumulator () apropos-files-scanned ())
(let ((standard-input (get-buffer-create " apropos-temp"))
- f v)
+ f v sf sv)
(unwind-protect
(save-excursion
(set-buffer standard-input)
(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
- (setcar apropos-item f))
+ (progn
+ (setcar (nthcdr 1 apropos-item) f)
+ (setcar apropos-item (+ (car apropos-item) sf))))
(if v
- (setcar (cdr apropos-item) v)))
+ (progn
+ (setcar (nthcdr 2 apropos-item) v)
+ (setcar apropos-item (+ (car apropos-item) sv)))))
(setq apropos-accumulator
- (cons (list symbol f v)
+ (cons (list symbol
+ (+ (apropos-score-symbol symbol 2) sf sv)
+ f v)
apropos-accumulator)))))))
- (apropos-print nil t))
+ (apropos-print nil "\n----------------\n"))
(kill-buffer standard-input))))
\f
(if (consp doc)
(apropos-documentation-check-elc-file (car doc))
(and doc
- (string-match apropos-regexp doc)
+ (string-match apropos-all-regexp doc)
+ (save-match-data (apropos-true-hit-doc doc))
(progn
(if apropos-match-face
(put-text-property (match-beginning 0)
(beginning-of-line 2)
(if (save-restriction
(narrow-to-region (point) (1- sepb))
- (re-search-forward apropos-regexp nil t))
+ (re-search-forward apropos-all-regexp nil t))
(progn
(setq beg (match-beginning 0)
end (point))
(goto-char (1+ sepa))
- (or (setq type (if (eq ?F (preceding-char))
- 1 ; function documentation
- 2) ; variable documentation
- symbol (read)
- beg (- beg (point) 1)
- end (- end (point) 1)
- doc (buffer-substring (1+ (point)) (1- sepb))
- apropos-item (assq symbol apropos-accumulator))
- (setq apropos-item (list symbol nil nil)
- apropos-accumulator (cons apropos-item
- apropos-accumulator)))
- (if apropos-match-face
- (put-text-property beg end 'face apropos-match-face doc))
- (setcar (nthcdr type apropos-item) doc)))
+ (setq type (if (eq ?F (preceding-char))
+ 2 ; function documentation
+ 3) ; variable documentation
+ symbol (read)
+ beg (- beg (point) 1)
+ end (- end (point) 1)
+ 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)
+ (+ (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)))
+ (if apropos-match-face
+ (put-text-property beg end 'face apropos-match-face doc))
+ (setcar (nthcdr type apropos-item) doc))))
(setq sepa (goto-char sepb)))))
(defun apropos-documentation-check-elc-file (file)
(if (save-restriction
;; match ^ and $ relative to doc string
(narrow-to-region beg end)
- (re-search-forward apropos-regexp nil t))
+ (re-search-forward apropos-all-regexp nil t))
(progn
(goto-char (+ end 2))
(setq doc (buffer-substring beg end)
end (- (match-end 0) beg)
- beg (- (match-beginning 0) beg)
- 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 (setq apropos-item (assq symbol apropos-accumulator))
- (setq apropos-item (list symbol nil nil)
- apropos-accumulator (cons apropos-item
- apropos-accumulator)))
- (if apropos-match-face
- (put-text-property beg end 'face apropos-match-face
- doc))
- (setcar (nthcdr (if this-is-a-variable 2 1)
- apropos-item)
- doc)))))))))
+ 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)))
+ (if apropos-match-face
+ (put-text-property beg end 'face apropos-match-face
+ doc))
+ (setcar (nthcdr (if this-is-a-variable 3 2)
+ apropos-item)
+ doc))))))))))
function))
-
-(defvar apropos-label-properties nil
- "List of face properties to use for a label.
-Bound by `apropos-print' for use by `apropos-print-doc'.")
-
(defun apropos-print (do-keys spacing)
"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 FN-DOC VAR-DOC [PLIST-DOC]).
+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."
+`apropos-accumulator' to nil before returning.
+
+If SPACING is non-nil, it should be a string;
+separate items with that string."
(if (null apropos-accumulator)
- (message "No apropos matches for `%s'" apropos-regexp)
+ (message "No apropos matches for `%s'" apropos-orig-regexp)
(setq apropos-accumulator
- (sort apropos-accumulator (lambda (a b)
- (string-lessp (car a) (car b)))))
- (setq apropos-label-properties
- (if (and apropos-label-face
- (symbolp apropos-label-face))
- `(face ,apropos-label-face
- mouse-face highlight
- help-echo "mouse-2: display help on this item")))
+ (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 point1 point2)
+ symbol item)
(set-buffer standard-output)
(apropos-mode)
(if (display-mouse-p)
- (insert "If you move the mouse over text that changes color,\n"
- (substitute-command-keys
- "you can click \\[apropos-mouse-follow] to get more information.\n")))
- (insert (substitute-command-keys
- "In this buffer, type \\[apropos-follow] to get full documentation.\n\n"))
+ (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"))
(while (consp p)
- (or (not spacing) (bobp) (terpri))
+ (when (and spacing (not (bobp)))
+ (princ spacing))
(setq apropos-item (car p)
symbol (car apropos-item)
- p (cdr p)
- point1 (point))
- (princ symbol) ; print symbol name
- (setq point2 (point))
+ p (cdr p))
+ (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 apropos-sort-by-scores
+ (insert " (" (number-to-string (cadr apropos-item)) ") "))
;; Calculate key-bindings if we want them.
(and do-keys
(commandp symbol)
(put-text-property (- (point) 3) (point)
'face apropos-keybinding-face)))
(terpri)
- ;; only now so we don't propagate text attributes all over
- (put-text-property point1 point2 'item
- (if (eval `(or ,@(cdr apropos-item)))
- (car apropos-item)
- apropos-item))
- (if apropos-symbol-face
- (put-text-property point1 point2 'face apropos-symbol-face))
- (apropos-print-doc 'describe-function 1
+ (apropos-print-doc 2
(if (commandp symbol)
- "Command"
+ 'apropos-command
(if (apropos-macrop symbol)
- "Macro"
- "Function"))
+ 'apropos-macro
+ 'apropos-function))
t)
- ;; 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'.
- (apropos-print-doc 'describe-variable 2 "Variable" t)
- (apropos-print-doc 'customize-group-other-window 6 "Group" t)
- (apropos-print-doc 'describe-face 5 "Face" t)
- (apropos-print-doc 'widget-browse-other-window 4 "Widget" t)
- (apropos-print-doc 'apropos-describe-plist 3
- "Plist" nil))
+ (apropos-print-doc 3 'apropos-variable t)
+ (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
'(macro t))))))
-(defun apropos-print-doc (action i str do-keys)
+(defun apropos-print-doc (i type do-keys)
(if (stringp (setq i (nth i apropos-item)))
(progn
(insert " ")
- (put-text-property (- (point) 2) (1- (point))
- 'action action)
- (insert str ": ")
- (if apropos-label-properties
- (add-text-properties (- (point) (length str) 2)
- (1- (point))
- apropos-label-properties))
+ (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-mouse-follow (event)
- (interactive "e")
- (let ((other (if (eq (current-buffer) (get-buffer "*Apropos*"))
- ()
- (current-buffer))))
- (save-excursion
- (set-buffer (window-buffer (posn-window (event-start event))))
- (goto-char (posn-point (event-start event)))
- (or (and (not (eobp)) (get-text-property (point) 'mouse-face))
- (and (not (bobp)) (get-text-property (1- (point)) 'mouse-face))
- (error "There is nothing to follow here"))
- (apropos-follow other))))
-
-
-(defun apropos-follow (&optional other)
+(defun apropos-follow ()
+ "Invokes any button at point, otherwise invokes the nearest label button."
(interactive)
- (let* (;; Properties are always found at the beginning of the line.
- (bol (save-excursion (beginning-of-line) (point)))
- ;; If there is no `item' property here, look behind us.
- (item (get-text-property bol 'item))
- (item-at (if item nil (previous-single-property-change bol 'item)))
- ;; Likewise, if there is no `action' property here, look in front.
- (action (get-text-property bol 'action))
- (action-at (if action nil (next-single-property-change bol 'action))))
- (and (null item) item-at
- (setq item (get-text-property (1- item-at) 'item)))
- (and (null action) action-at
- (setq action (get-text-property action-at 'action)))
- (if (not (and item action))
- (error "There is nothing to follow here"))
- (if (consp item) (error "There is nothing to follow in `%s'" (car item)))
- (if other (set-buffer other))
- (funcall action item)))
-
+ (button-activate
+ (or (apropos-next-label-button (line-beginning-position))
+ (error "There is nothing to follow here"))))
(defun apropos-describe-plist (symbol)
(princ ")")
(print-help-return-message)))
+
(provide 'apropos)
+;;; arch-tag: d56fa2ac-e56b-4ce3-84ff-852f9c0dc66e
;;; apropos.el ends here
HCoop / bpt / emacs.git / blobdiff