;; 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
+;; 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., 59 Temple Place - Suite 330,
+;; Boston, MA 02111-1307, USA.
;;; Commentary:
;;; Made doc file buffer read-only, buried it.
;; Only call substitute-command-keys if do-all set.
-;; Optionally use faces to make the output more legible.
-;; Differentiate between command and function.
+;; 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.
;;; Code:
+(defgroup apropos nil
+ "Apropos commands for users and programmers"
+ :group 'help
+ :prefix "apropos")
+
;; I see a degradation of maybe 10-20% only.
-(defvar apropos-do-all nil
+(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.")
+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)
-(defvar apropos-use-faces window-system
- "*Whether the apropos commands display output using bold and italic.
-This looks good, but slows down the commands several times.")
+(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)
-(defvar apropos-local-map
+(defcustom apropos-match-face 'secondary-selection
+ "*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 regexp; the part that matches gets displayed in this font."
+ :group 'apropos
+ :type 'face)
+
+
+(defvar apropos-mode-map
(let ((map (make-sparse-keymap)))
(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)
- "Local map active when displaying apropos output.")
+ "Keymap used in Apropos mode.")
+
+(defvar apropos-mode-hook nil
+ "*Hook run when mode is turned on.")
+(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'.")
-;;;###autoload (fset 'command-apropos 'apropos-command)
+(defvar apropos-accumulator ()
+ "Alist of symbols already found in current apropos run.")
+
+(defvar apropos-item ()
+ "Current item in or for `apropos-accumulator'.")
+\f
+;;;###autoload
+(define-derived-mode apropos-mode fundamental-mode "Apropos"
+ "Major mode for following hyperlinks in output of apropos commands.
+
+\\{apropos-mode-map}")
+
+;;;###autoload
+(defun apropos-variable (regexp &optional do-all)
+ "Show user variables that match REGEXP.
+With optional prefix DO-ALL or if `apropos-do-all' is non-nil, also show
+normal variables."
+ (interactive (list (read-string
+ (concat "Apropos "
+ (if (or current-prefix-arg apropos-do-all)
+ "variable"
+ "user option")
+ " (regexp): "))
+ current-prefix-arg))
+ (apropos-command regexp 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
-(defun apropos-command (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."
- (interactive (list (read-string (concat "Apropos command "
- (if (or current-prefix-arg
- apropos-do-all)
- "or variable ")
- "(regexp): "))
- (or current-prefix-arg apropos-do-all)))
+(fset 'command-apropos 'apropos-command)
+;;;###autoload
+(defun apropos-command (apropos-regexp &optional do-all var-predicate)
+ "Show commands (interactively callable functions) that match APROPOS-REGEXP.
+With optional prefix DO-ALL, or if `apropos-do-all' is non-nil, also show
+noninteractive functions.
+
+If VAR-PREDICATE is non-nil, show only variables, and only those that
+satisfy the predicate VAR-PREDICATE."
+ (interactive (list (read-string (concat
+ "Apropos command "
+ (if (or current-prefix-arg
+ apropos-do-all)
+ "or function ")
+ "(regexp): "))
+ current-prefix-arg))
(let ((message
- (let ((standard-output (get-buffer-create "*Help*")))
+ (let ((standard-output (get-buffer-create "*Apropos*")))
(print-help-return-message 'identity))))
- (if (apropos-print
- regexp
- (apropos-internal regexp
- (if do-all
- (lambda (x) (or (commandp x)
- (user-variable-p x)))
- 'commandp))
- t
- (lambda (p)
- (let (doc symbol)
- (while p
- (setcar p (list
- (setq symbol (car p))
- (if (commandp symbol)
- (if (setq doc (documentation symbol t))
- (substring doc 0 (string-match "\n" doc))
- "(not documented)"))
- (and do-all
- (user-variable-p symbol)
- (if (setq doc (documentation-property
- symbol 'variable-documentation t))
- (substring doc 0
- (string-match "\n" doc))))))
- (setq p (cdr p)))))
- nil)
- (and message (message message)))))
-
+ (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 (get (car tem) 'apropos-inhibit)
+ (setq apropos-accumulator (delq (car tem) apropos-accumulator)))
+ (setq tem (cdr tem))))
+ (let ((p apropos-accumulator)
+ doc symbol)
+ (while p
+ (setcar p (list
+ (setq symbol (car p))
+ (unless var-predicate
+ (if (functionp symbol)
+ (if (setq doc (documentation symbol t))
+ (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))))))
+ (setq p (cdr p))))
+ (and (apropos-print t nil)
+ message
+ (message message))))
;;;###autoload
-(defun apropos (regexp &optional do-all)
- "Show all symbols whose names match REGEXP.
-With optional prefix ARG or if `apropos-do-all' is non-nil, also show key
-bindings, which is a little more time-consuming.
-Returns list of symbols and documentation found."
+(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")
+ (setq apropos-accumulator
+ (apropos-internal apropos-regexp
+ (and (not do-all)
+ (not apropos-do-all)
+ (lambda (symbol)
+ (or (fboundp symbol)
+ (boundp symbol)
+ (facep symbol)
+ (symbol-plist symbol))))))
+ (let ((tem apropos-accumulator))
+ (while tem
+ (if (get (car tem) 'apropos-inhibit)
+ (setq apropos-accumulator (delq (car tem) apropos-accumulator)))
+ (setq tem (cdr tem))))
+ (let ((p apropos-accumulator)
+ symbol doc properties)
+ (while p
+ (setcar p (list
+ (setq symbol (car p))
+ (when (fboundp symbol)
+ (if (setq doc (condition-case nil
+ (documentation symbol t)
+ (void-function
+ "(alias for undefined function)")))
+ (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)"))
+ (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)"))
+ (when (facep symbol)
+ (if (setq doc (documentation-property
+ symbol 'face-documentation t))
+ (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))))
(apropos-print
- regexp (apropos-internal regexp)
- (or apropos-do-all do-all)
- (lambda (p)
- (let (symbol doc)
- (while p
- (setcar p (list
- (setq symbol (car p))
- (if (fboundp symbol)
- (if (setq doc (documentation symbol t))
- (substring doc 0 (string-match "\n" doc))
- "(not documented)"))
- (if (boundp symbol)
- (if (setq doc (documentation-property
- symbol 'variable-documentation t))
- (substring doc 0
- (string-match "\n" doc))
- "(not documented)"))
- (if (setq doc (symbol-plist symbol))
- (if (eq (setq doc (/ (length doc) 2)) 1)
- "1 property"
- (concat doc " properties")))))
- (setq p (cdr p)))))
+ (or do-all apropos-do-all)
nil))
-
;;;###autoload
-(defun apropos-value (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
+(defun apropos-value (apropos-regexp &optional do-all)
+ "Show all symbols whose value's printed image matches APROPOS-REGEXP.
+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 documentation found."
+Returns list of symbols and values found."
(interactive "sApropos value (regexp): \nP")
- (setq do-all (or apropos-do-all do-all))
- (apropos-print
- regexp
- (let (accumulator f v p)
+ (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 '(regexp do-all accumulator symbol v pl p))
- (if (boundp symbol)
- (setq v (prin1-to-string (symbol-value symbol))
- v (if (string-match regexp v) v))))
+ (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
- (progn
- (if (fboundp symbol)
- (setq f (prin1-to-string (symbol-function symbol))
- f (if (string-match regexp f) f)))
- (setq p (apropos-format-plist symbol "\n " regexp))))
- ;; (if p-out (insert p-out))
+ (setq f (apropos-value-internal 'fboundp symbol 'symbol-function)
+ p (apropos-format-plist symbol "\n " t)))
(if (or f v p)
- (setq accumulator (cons (list symbol f v p) accumulator)))))
- accumulator)
- nil nil t))
+ (setq apropos-accumulator (cons (list symbol f v p)
+ apropos-accumulator))))))
+ (apropos-print nil t))
+
+;;;###autoload
+(defun apropos-documentation (apropos-regexp &optional do-all)
+ "Show symbols whose documentation contain matches for APROPOS-REGEXP.
+With optional prefix DO-ALL 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))
+ (if (integerp v) (setq v))
+ (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 t))
+ (kill-buffer standard-input))))
-(defun apropos-format-plist (pl sep &optional regexp)
+\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 (string-match (or regexp "") p)
- (if apropos-use-faces
+ (if (or (not compare) (string-match apropos-regexp p))
+ (if apropos-property-face
(put-text-property 0 (length (symbol-name (car pl)))
- 'face 'bold-italic p))
+ 'face apropos-property-face p))
(setq p nil))
- (if p (setq p-out (concat p-out (if p-out sep) p)))
+ (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))
-
-;;;###autoload
-(defun apropos-documentation (regexp &optional do-all)
- "Show symbols whose names or 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")
- (setq do-all (or apropos-do-all do-all))
- (let (accumulator fn-doc var-doc item)
- (setq accumulator (apropos-documentation-check-doc-file regexp))
- (if do-all
- (mapatoms
- (lambda (symbol)
- (setq fn-doc (safe-documentation symbol)
- var-doc (get symbol 'variable-documentation))
- (if (numberp var-doc)
- (setq var-doc nil))
- (if (string-match regexp (symbol-name symbol))
- ()
- (if fn-doc
- (or (string-match regexp fn-doc)
- (setq fn-doc nil)))
- (if var-doc
- (or (string-match regexp var-doc)
- (setq var-doc nil))))
- (if (or fn-doc var-doc)
- (if (setq item (cdr (assq symbol accumulator)))
- (progn
- (if fn-doc
- (setcar item fn-doc))
- (if var-doc
- (setcar (cdr item) var-doc)))
- (setq accumulator
- (cons (list symbol fn-doc var-doc)
- accumulator)))))))
- (apropos-print regexp accumulator do-all nil t)))
-
-\f
-
-;; Finds all documentation related to REGEXP in internal-doc-file-name.
-;; Returns an alist of form ((symbol fn-doc var-doc) ...).
-
-(defun apropos-documentation-check-doc-file (regexp)
- (let ((doc-buffer (get-buffer-create " *apropos-doc*"))
- ;; item is already let
- type symbol sym-list)
- (set-buffer doc-buffer)
- (goto-char (point-min))
- (if (eobp)
- (insert-file-contents (concat doc-directory internal-doc-file-name)))
- (while (re-search-forward regexp nil t)
- (search-backward "\C-_")
- (or (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
- (1+ (point))
- (if (search-forward "\C-_" nil 'move)
- (1- (point))
- (point)))
- item (assq symbol sym-list))
- (setq item (list symbol nil nil)
- sym-list (cons item sym-list)))
- (setcar (nthcdr type item) doc))
- sym-list))
-
-
-
-;; This function is misnamed, it is simply a variety of the original
-;; that might be handled easier and more efficiently by that with a flag.
-;; Otherwise it might be inlined above.
-
-(defun safe-documentation (function)
- "Like documentation, except it avoids calling `get_doc_string'.
+;; Finds all documentation related to APROPOS-REGEXP in internal-doc-file-name.
+
+(defun apropos-documentation-check-doc-file ()
+ (let (type symbol (sepa 2) sepb beg end)
+ (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 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 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-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)))))))))
+
+
+
+(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)
(if (eq (car-safe function) 'macro)
(setq function (cdr function)))
(setq function (if (byte-code-function-p function)
- (condition-case nil
- (aref function 4)
- (error))
- (if (memq (car-safe function) '(lambda autoload))
- (nth 2 function))))
- (if (stringp function)
- function))
-
-
-
-(defun apropos-print (regexp apropos-result do-keys doc-fn spacing)
- "Output result of various appropos commands with REGEXP.
-APROPOS-RESULT is a list. Optional DOC-FN is called for each element
-of apropos-result and may modify it resulting in (symbol fn-doc
-var-doc [plist-doc]). Returns sorted list of symbols and documentation
-found."
- (if (null apropos-result)
- (message "No apropos matches for `%s'" regexp)
- (if doc-fn
- (funcall doc-fn apropos-result))
- (setq apropos-result
- (sort apropos-result (lambda (a b)
- (string-lessp (car a) (car b)))))
- (with-output-to-temp-buffer "*Help*"
- (let ((p apropos-result)
+ (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))
+
+
+
+(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]).
+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 (null apropos-accumulator)
+ (message "No apropos matches for `%s'" apropos-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")))
+ (with-output-to-temp-buffer "*Apropos*"
+ (let ((p apropos-accumulator)
(old-buffer (current-buffer))
- symbol item tem point1 point2)
- (save-excursion
- (set-buffer standard-output)
- (if window-system
- (insert (substitute-command-keys
- "Click \\<apropos-local-map>\\[apropos-mouse-follow] to get full documentation.\n")))
- (insert (substitute-command-keys
- "In this buffer, type \\<apropos-local-map>\\[apropos-follow] to get full documentation.\n\n"))
- (while (consp p)
- (or (not spacing) (bobp) (terpri))
- (setq item (car p)
- symbol (car item)
- p (cdr p)
- point1 (point))
- (princ symbol) ;print symbol name
- (setq point2 (point))
- ;; don't calculate key-bindings unless needed
- (and do-keys
- (commandp symbol)
- (indent-to 30 1)
- (princ (if (setq tem (save-excursion
- (set-buffer old-buffer)
- (where-is-internal symbol)))
- (mapconcat 'key-description tem ", ")
- "(not bound to any keys)")))
- (terpri)
- ;; only now so we don't propagate text attributes all over
- (put-text-property point1 (1+ point1) 'item
- (if (or (nth 1 item) (nth 2 item) (nth 3 item))
- (car item)
- item))
- (if apropos-use-faces
- (put-text-property point1 point2 'face 'bold))
- (apropos-print-documentation 'describe-function (nth 1 item)
- (if (commandp symbol)
- "Command: "
- "Function: ")
- do-keys)
- (apropos-print-documentation 'describe-variable (nth 2 item)
- "Variable: " do-keys)
- (apropos-print-documentation 'apropos-describe-plist (nth 3 item)
- "Plist: " nil))
- (put-text-property 1 (point) 'local-map apropos-local-map)))))
- apropos-result)
-
-
-(defun apropos-print-documentation (action tem str do-keys)
- (if tem
+ symbol item point1 point2)
+ (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"))
+ (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.
+ (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")
+ (put-text-property (- (point) 3) (point)
+ 'face apropos-keybinding-face)
+ (insert " " (symbol-name symbol) " ")
+ (insert "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))
+ (apropos-print-doc 'describe-function 1
+ (if (commandp symbol)
+ "Command"
+ (if (apropos-macrop symbol)
+ "Macro"
+ "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))
+ (setq buffer-read-only t))))
+ (prog1 apropos-accumulator
+ (setq apropos-accumulator ()))) ; permit gc
+
+
+(defun apropos-macrop (symbol)
+ "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)
+ (if (stringp (setq i (nth i apropos-item)))
(progn
(insert " ")
(put-text-property (- (point) 2) (1- (point))
'action action)
- (princ str)
- (if apropos-use-faces
- (add-text-properties (- (point) (length str))
+ (insert str ": ")
+ (if apropos-label-properties
+ (add-text-properties (- (point) (length str) 2)
(1- (point))
- '(face italic
- mouse-face highlight)))
- (insert (if do-keys (substitute-command-keys tem) tem))))
- (or (bolp) (terpri)))
-
+ apropos-label-properties))
+ (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 "*Help*"))
+ (let ((other (if (eq (current-buffer) (get-buffer "*Apropos*"))
()
(current-buffer))))
- (set-buffer (window-buffer (posn-window (event-start event))))
- (goto-char (posn-point (event-start event)))
- ;; somehow when clicking with the point in another window, doesn't undo
- (undo-boundary)
- (apropos-follow other)))
+ (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)
(interactive)
- (let ((point (point))
- (item (get-text-property (point) 'item))
- action action-point)
- (or item
- (setq item (if (bobp)
- ()
- (previous-single-property-change (point) 'item))
- item (get-text-property
- (1- (goto-char
- (if item
- item
- (1+ (next-single-property-change (point) 'item)))))
- 'item)))
- (if (consp item)
- (error "%s is just a lonely smbol." (car item)))
- (while (if (setq action-point
- (next-single-property-change (point) 'action))
- (<= action-point point))
- (goto-char (1+ action-point))
- (setq action action-point))
- (funcall
- (prog1 (get-text-property (or action action-point (point)) 'action)
- (if other (set-buffer other)))
- item))
- (message "%sype %s (undo) to get back to apropos-listing."
- (if other "In *Help* buffer t" "T")
- (key-description (where-is-internal 'undo nil 1))))
+ (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)))
(princ "Symbol ")
(prin1 symbol)
(princ "'s plist is\n (")
- (if apropos-use-faces
- (put-text-property 8 (- (point) 14) 'face 'bold))
+ (if apropos-symbol-face
+ (put-text-property 8 (- (point) 14) 'face apropos-symbol-face))
(insert (apropos-format-plist symbol "\n "))
- (princ ")")))
+ (princ ")")
+ (print-help-return-message)))
+
+(provide 'apropos)
;;; apropos.el ends here