--- /dev/null
+;;; apropos.el --- apropos commands for users and programmers.
+
+;; Copyright (C) 1989, 1994, 1995 Free Software Foundation, Inc.
+
+;; Author: Joe Wells <jbw@bigbird.bu.edu>
+;; Rewritten: Daniel.Pfeiffer@Informatik.START.dbp.de, fax (+49 69) 7588-2389
+;; Maintainer: SL Baur <steve@xemacs.org>
+;; Keywords: help
+
+;; This file is part of XEmacs.
+
+;; XEmacs is free software; you can redistribute it and/or modify it
+;; under the terms of the GNU General Public License as published by
+;; the Free Software Foundation; either version 2, or (at your option)
+;; any later version.
+
+;; XEmacs is distributed in the hope that it will be useful, but
+;; WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 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, Inc., 59 Temple Place - Suite 330,
+;; Boston, MA 02111-1307, USA.
+
+;;; Synched up with: Last synched with FSF 19.34, diverged since.
+
+;;; Commentary:
+
+;; The ideas for this package were derived from the C code in
+;; src/keymap.c and elsewhere. The functions in this file should
+;; always be byte-compiled for speed. Someone should rewrite this in
+;; C (as part of src/keymap.c) for speed.
+
+;; The idea for super-apropos is based on the original implementation
+;; by Lynn Slater <lrs@esl.com>.
+
+;;; ChangeLog:
+
+;; 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.
+;; Added apropos-do-all option.
+;;; Added fast-command-apropos.
+;; Changed doc strings to comments for helping functions.
+;;; 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:
+
+;; I see a degradation of maybe 10-20% only.
+;; [sb -- FSF protects the face declarations with `if window-system'
+;; I see no reason why we should do so]
+(defvar 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.")
+
+;; XEmacs addition
+(defvar apropos-symbol-face (if (boundp 'font-lock-keyword-face)
+ font-lock-keyword-face
+ 'bold)
+ "*Face for symbol name in apropos output or `nil'.
+This looks good, but slows down the commands several times.")
+
+;; XEmacs addition
+(defvar apropos-keybinding-face (if (boundp 'font-lock-string-face)
+ font-lock-string-face
+ 'underline)
+ "*Face for keybinding display in apropos output or `nil'.
+This looks good, but slows down the commands several times.")
+
+;; XEmacs addition
+(defvar apropos-label-face (if (boundp 'font-lock-comment-face)
+ font-lock-comment-face
+ 'italic)
+ "*Face for label (Command, Variable ...) in apropos output or `nil'.
+If this is `nil' no mouse highlighting occurs.
+This looks good, but slows down the commands several times.
+When this is a face name, as it is initially, it gets transformed to a
+text-property list for efficiency.")
+
+;; XEmacs addition
+(defvar apropos-property-face (if (boundp 'font-lock-variable-name-face)
+ font-lock-variable-name-face
+ 'bold-italic)
+ "*Face for property name in apropos output or `nil'.
+This looks good, but slows down the commands several times.")
+
+(defvar apropos-match-face 'secondary-selection
+ "*Face for matching part in apropos-documentation/value output or `nil'.
+This looks good, but slows down the commands several times.")
+
+
+(defvar apropos-mode-map
+ (let ((map (make-sparse-keymap)))
+ (define-key map [(control m)] 'apropos-follow)
+ (define-key map [return] 'apropos-follow)
+ (define-key map [(button2up)] 'apropos-mouse-follow)
+ (define-key map [(button2)] 'undefined)
+ map)
+ "Keymap used in Apropos mode.")
+
+
+(defvar apropos-regexp nil
+ "Regexp used in current apropos run.")
+
+(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.")
+\f
+(defvar apropos-mode-hook nil) ; XEmacs
+
+(defun apropos-mode ()
+ "Major mode for following hyperlinks in output of apropos commands.
+
+\\{apropos-mode-map}"
+ (interactive)
+ (kill-all-local-variables)
+ (use-local-map apropos-mode-map)
+ (setq major-mode 'apropos-mode
+ mode-name "Apropos")
+ (run-hooks 'apropos-mode-hook)) ; XEmacs
+
+
+;; For auld lang syne:
+;;;###autoload
+(fset 'command-apropos 'apropos-command)
+
+;;;###autoload
+(defun apropos-command (apropos-regexp &optional do-all)
+ "Shows commands (interactively callable functions) that match REGEXP.
+With optional prefix ARG or if `apropos-do-all' is non-nil, also show
+variables."
+ ;; XEmacs: All code related to special treatment of buffer has been removed
+ (interactive (list (read-string (concat "Apropos command "
+ (if (or current-prefix-arg
+ apropos-do-all)
+ "or variable ")
+ "(regexp): "))
+ current-prefix-arg))
+ (or do-all (setq do-all apropos-do-all))
+ (setq apropos-accumulator
+ (apropos-internal apropos-regexp
+ (if do-all
+ (lambda (symbol) (or (commandp symbol)
+ (user-variable-p symbol)))
+ 'commandp)))
+ (apropos-print
+ t
+ (lambda (p)
+ (let (doc symbol)
+ (while p
+ (setcar p (list
+ (setq symbol (car p))
+ (if (commandp symbol)
+ (if (setq doc
+ ;; XEmacs change: if obsolete,
+ ;; only mention that.
+ (or (function-obsoleteness-doc symbol)
+ (condition-case nil
+ (documentation symbol t)
+ (void-function "(aliased to undefined function)")
+ (error "(unexpected error from `documention')"))))
+ (substring doc 0 (string-match "\n" doc))
+ "(not documented)"))
+ (and do-all
+ (user-variable-p symbol)
+ (if (setq doc
+ (or
+ ;; XEmacs change: if obsolete,
+ ;; only mention that.
+ (variable-obsoleteness-doc symbol)
+ (documentation-property
+ symbol 'variable-documentation t)))
+ (substring doc 0
+ (string-match "\n" doc))))))
+ (setq p (cdr p)))))
+ nil))
+
+
+;;;###autoload
+(defun apropos (apropos-regexp &optional do-all)
+ "Show all bound symbols whose names match REGEXP.
+With optional prefix ARG 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")
+ ;; XEmacs change: hitting ENTER by mistake is a common mess-up and
+ ;; shouldn't make Emacs hang for a long time trying to list all symbols.
+ (or (> (length apropos-regexp) 0)
+ (error "Must pass non-empty regexp to `apropos'"))
+ (setq apropos-accumulator
+ (apropos-internal apropos-regexp
+ (and (not do-all)
+ (not apropos-do-all)
+ (lambda (symbol)
+ (or (fboundp symbol)
+ (boundp symbol)
+ (find-face symbol)
+ (symbol-plist symbol))))))
+ (apropos-print
+ (or do-all apropos-do-all)
+ (lambda (p)
+ (let (symbol doc)
+ (while p
+ (setcar p (list
+ (setq symbol (car p))
+ (if (fboundp symbol)
+ (if (setq doc
+ ;; XEmacs change: if obsolete,
+ ;; only mention that.
+ (or (function-obsoleteness-doc symbol)
+ (condition-case nil
+ (documentation symbol t)
+ (void-function "(aliased to undefined function)")
+ (error "(unexpected error from `documention')"))))
+ (substring doc 0 (string-match "\n" doc))
+ "(not documented)"))
+ (if (boundp symbol)
+ (if (setq doc
+ (or
+ ;; XEmacs change: if obsolete,
+ ;; only mention that.
+ (variable-obsoleteness-doc symbol)
+ (documentation-property
+ symbol 'variable-documentation t)))
+ (substring doc 0
+ (string-match "\n" doc))
+ "(not documented)"))
+ (if (setq doc (symbol-plist symbol))
+ (if (eq (/ (length doc) 2) 1)
+ (format "1 property (%s)" (car doc))
+ (format "%d properties" (/ (length doc) 2))))
+ (if (get symbol 'widget-type)
+ (if (setq doc (documentation-property
+ symbol 'widget-documentation t))
+ (substring doc 0
+ (string-match "\n" doc))
+ "(not documented)"))
+ (if (find-face symbol)
+ (if (setq doc (face-doc-string symbol))
+ (substring doc 0
+ (string-match "\n" doc))
+ "(not documented)"))
+ (when (get symbol 'custom-group)
+ (if (setq doc (documentation-property
+ symbol 'group-documentation t))
+ (substring doc 0
+ (string-match "\n" doc))
+ "(not documented)"))))
+ (setq p (cdr p)))))
+ nil))
+
+
+;;;###autoload
+(defun apropos-value (apropos-regexp &optional do-all)
+ "Show all symbols whose value's printed image matches REGEXP.
+With optional prefix ARG 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")
+ (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))
+ (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 (or f v p)
+ (setq apropos-accumulator (cons (list symbol f v p)
+ apropos-accumulator))))))
+ (apropos-print nil nil t))
+
+
+;;;###autoload
+(defun apropos-documentation (apropos-regexp &optional do-all)
+ "Show symbols whose documentation contain matches for REGEXP.
+With optional prefix ARG 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 "sApropos documentation (regexp): \nP")
+ (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)
+ (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))
+ (when (integerp v) (setq v nil))
+ (setq f (apropos-documentation-internal f)
+ v (apropos-documentation-internal v))
+ (if (or f v)
+ (if (setq apropos-item
+ (cdr (assq symbol apropos-accumulator)))
+ (progn
+ (if f
+ (setcar apropos-item f))
+ (if v
+ (setcar (cdr apropos-item) v)))
+ (setq apropos-accumulator
+ (cons (list symbol f v)
+ apropos-accumulator)))))))
+ (apropos-print nil nil t))
+ (kill-buffer standard-input))))
+
+\f
+(defun apropos-value-internal (predicate symbol function)
+ (if (funcall predicate symbol)
+ (progn
+ (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))
+ (and doc
+ (string-match apropos-regexp doc)
+ (progn
+ (if apropos-match-face
+ (put-text-property (match-beginning 0)
+ (match-end 0)
+ 'face apropos-match-face
+ (setq doc (copy-sequence doc))))
+ doc))))
+
+(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 start end doc)
+ (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-regexp nil t))
+ (progn
+ (setq start (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)
+ start (- start (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 start 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 (member file apropos-files-scanned)
+ nil
+ (let (symbol doc start 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)
+ start (1+ (point))
+ end (+ (point) end -1))
+ (forward-char)
+ (if (save-restriction
+ ;; match ^ and $ relative to doc string
+ (narrow-to-region start end)
+ (re-search-forward apropos-regexp nil t))
+ (progn
+ (goto-char (+ end 2))
+ (setq doc (buffer-substring start end)
+ end (- (match-end 0) start)
+ start (- (match-beginning 0) start)
+ 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 start end 'face apropos-match-face
+ doc))
+ (setcar (nthcdr (if this-is-a-variable 2 1)
+ apropos-item)
+ doc)))))))))
+
+
+
+(defun apropos-safe-documentation (function)
+ "Like documentation, except it avoids calling `get_doc_string'.
+Will return nil instead."
+ (while (and function (symbolp function))
+ (setq function (if (fboundp function)
+ (symbol-function function))))
+ (if (eq (car-safe function) 'macro)
+ (setq function (cdr function)))
+ ;; XEmacs change from: (setq function (if (byte-code-function-p function)
+ (setq function (if (compiled-function-p function)
+ (if (fboundp 'compiled-function-doc-string)
+ (compiled-function-doc-string 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
+ function))
+
+
+
+(defun apropos-print (do-keys doc-fn spacing)
+ "Output result of various apropos commands with `apropos-regexp'.
+APROPOS-ACCUMULATOR is a list. Optional DOC-FN is called for each element
+of apropos-accumulator and may modify it resulting in (symbol fn-doc
+var-doc [plist-doc]). Returns sorted list of symbols and documentation
+found."
+ (if (null apropos-accumulator)
+ (message "No apropos matches for `%s'" apropos-regexp)
+ (if doc-fn
+ (funcall doc-fn apropos-accumulator))
+ (setq apropos-accumulator
+ (sort apropos-accumulator (lambda (a b)
+ (string-lessp (car a) (car b)))))
+ (and apropos-label-face
+ (or (symbolp apropos-label-face)
+ (facep apropos-label-face)) ; XEmacs
+ (setq apropos-label-face `(face ,apropos-label-face
+ mouse-face highlight)))
+ (let ((help-buffer-prefix-string "Apropos"))
+ (with-displaying-help-buffer
+ (lambda ()
+ (with-current-buffer standard-output
+ (run-hooks 'apropos-mode-hook)
+ (let ((p apropos-accumulator)
+ (old-buffer (current-buffer))
+ symbol item point1 point2)
+ ;; Mostly useless but to provide better keymap
+ ;; explanation. help-mode-map will be used instead.
+ (use-local-map apropos-mode-map)
+ ;; XEmacs change from (if window-system
+ (if (device-on-window-system-p)
+ (progn
+ (princ "If you move the mouse over text that changes color,\n")
+ (princ (substitute-command-keys
+ "you can click \\[apropos-mouse-follow] to get more information.\n"))))
+ (princ (substitute-command-keys
+ "Type \\[apropos-follow] in this buffer to get full documentation.\n\n"))
+ (while (consp p)
+ (or (not spacing) (bobp) (terpri))
+ (setq apropos-item (car p)
+ symbol (car apropos-item)
+ p (cdr p)
+ point1 (point))
+ (princ symbol) ; print symbol name
+ (setq point2 (point))
+ ;; Calculate key-bindings if we want them.
+ (and do-keys
+ (commandp symbol)
+ (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.
+ (princ
+ (mapconcat
+ (lambda (key)
+ (setq key (key-description key))
+ (if apropos-keybinding-face
+ (put-text-property 0 (length key)
+ 'face apropos-keybinding-face
+ key))
+ key)
+ item ", "))
+ (princ "Type ")
+ (princ "M-x")
+ (put-text-property (- (point) 3) (point)
+ 'face apropos-keybinding-face)
+ (princ (format " %s " (symbol-name symbol)))
+ (princ "RET")
+ (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))
+ ;; Add text-property on symbol, too.
+ (put-text-property point1 point2 'keymap apropos-mode-map)
+ (apropos-print-doc 'describe-function 1
+ (if (commandp symbol)
+ "Command"
+ (if (apropos-macrop symbol)
+ "Macro"
+ "Function"))
+ do-keys)
+ (if (get symbol 'custom-type)
+ (apropos-print-doc 'customize-variable-other-window 2
+ "User Option" do-keys)
+ (apropos-print-doc 'describe-variable 2
+ "Variable" do-keys))
+ (apropos-print-doc 'customize-other-window 6 "Group" do-keys)
+ (apropos-print-doc 'customize-face-other-window 5 "Face" do-keys)
+ (apropos-print-doc 'widget-browse-other-window 4 "Widget" do-keys)
+ (apropos-print-doc 'apropos-describe-plist 3
+ "Plist" nil)))))
+ apropos-regexp))
+ (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 (action i str do-keys)
+ (with-current-buffer standard-output
+ (if (stringp (setq i (nth i apropos-item)))
+ (progn
+ (insert " ")
+ (put-text-property (- (point) 2) (1- (point))
+ 'action action)
+ (insert str ": ")
+ (if apropos-label-face
+ (add-text-properties (- (point) (length str) 2)
+ (1- (point))
+ apropos-label-face))
+ (add-text-properties (- (point) (length str) 2)
+ (1- (point))
+ (list 'keymap apropos-mode-map))
+ (insert (if do-keys (substitute-command-keys i) i))
+ (or (bolp) (terpri))))))
+
+(defun apropos-mouse-follow (event)
+ (interactive "e")
+ ;; XEmacs change: We're using the standard help buffer code now, don't
+ ;; do special tricks about trying to preserve current-buffer about mouse
+ ;; clicks.
+
+ (save-excursion
+ ;; XEmacs change from:
+ ;; (set-buffer (window-buffer (posn-window (event-start event))))
+ ;; (goto-char (posn-point (event-start event)))
+ (set-buffer (event-buffer event))
+ (goto-char (event-closest-point event))
+ ;; XEmacs change: following code seems useless
+ ;;(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)))
+
+
+(defun apropos-follow (&optional other)
+ (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)))
+
+
+
+(defun apropos-describe-plist (symbol)
+ "Display a pretty listing of SYMBOL's plist."
+ (let ((help-buffer-prefix-string "Apropos-plist"))
+ (with-displaying-help-buffer
+ (lambda ()
+ (run-hooks 'apropos-mode-hook)
+ (princ "Symbol ")
+ (prin1 symbol)
+ (princ "'s plist is\n (")
+ (with-current-buffer standard-output
+ (if apropos-symbol-face
+ (put-text-property 8 (- (point) 14) 'face apropos-symbol-face)))
+ (princ (apropos-format-plist symbol "\n "))
+ (princ ")")
+ (terpri)
+ (print-help-return-message))
+ (symbol-name symbol))))
+
+(provide 'apropos) ; XEmacs
+
+;;; apropos.el ends here
projects / chise / xemacs-chise.git- / blobdiff