mirror of
https://git.savannah.gnu.org/git/emacs.git
synced 2024-11-24 07:20:37 +00:00
75a768810d
Function: or Variable: if line doesn't fit with it. New arg no-header inhibits them entirely. (apropos): New arg no-header. Pass it to apropos-print-matches.
367 lines
13 KiB
EmacsLisp
367 lines
13 KiB
EmacsLisp
;;; apropos.el --- faster apropos commands.
|
|
|
|
;; Copyright (C) 1989, 1994 Free Software Foundation, Inc.
|
|
|
|
;; Author: Joe Wells <jbw@bigbird.bu.edu>
|
|
;; Keywords: help
|
|
|
|
;; This file is part of GNU Emacs.
|
|
|
|
;; GNU Emacs 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.
|
|
|
|
;; GNU Emacs 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, 675 Mass Ave, Cambridge, MA 02139, USA.
|
|
|
|
;;; 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>.
|
|
|
|
;; History:
|
|
;; 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.
|
|
|
|
;;; 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.")
|
|
|
|
;;;###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.
|
|
|
|
Optional argument NO-HEADER means don't print `Function:' or `Variable:'
|
|
in the output.
|
|
|
|
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))
|
|
|
|
;;;###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.
|
|
|
|
Returns list of symbols and documentation found."
|
|
(interactive "sSuper Apropos: \nP")
|
|
(setq do-all (or apropos-do-all do-all))
|
|
(let (apropos-accumulate fn-doc var-doc item)
|
|
(setq apropos-accumulate (super-apropos-check-doc-file regexp))
|
|
(if (null apropos-accumulate)
|
|
(message "No apropos matches for `%s'" 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))))
|
|
item (assq symbol sym-list))
|
|
(and (if (= type 1)
|
|
(and (fboundp symbol) (documentation symbol))
|
|
(documentation-property symbol 'variable-documentation))
|
|
(or item
|
|
(setq item (list symbol nil nil)
|
|
sym-list (cons item sym-list)))
|
|
(setcar (nthcdr type 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. WARNING: this
|
|
;; function depends on the symbols fn-doc var-doc regexp and item being bound
|
|
;; correctly when it is called!"
|
|
|
|
(defun super-apropos-accumulate (symbol)
|
|
(cond ((string-match regexp (symbol-name symbol))
|
|
(setq item (apropos-get-accum-item symbol))
|
|
(setcar (cdr item) (or (safe-documentation symbol)
|
|
(nth 1 item)))
|
|
(setcar (nthcdr 2 item) (or (safe-documentation-property symbol)
|
|
(nth 2 item))))
|
|
(t
|
|
(and (setq fn-doc (safe-documentation symbol))
|
|
(string-match regexp fn-doc)
|
|
(setcar (cdr (apropos-get-accum-item symbol)) fn-doc))
|
|
(and (setq var-doc (safe-documentation-property symbol))
|
|
(string-match regexp var-doc)
|
|
(setcar (nthcdr 2 (apropos-get-accum-item symbol)) 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)))))
|
|
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))
|
|
(maps (append (and current-local-map
|
|
(accessible-keymaps current-local-map))
|
|
(accessible-keymaps (current-global-map))))
|
|
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 in this key binding.
|
|
(and (consp command) (symbolp (cdr 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)
|
|
(progn
|
|
(setq apropos-accumulate
|
|
(cons (list symbol nil nil) apropos-accumulate))
|
|
(assq symbol apropos-accumulate))))
|
|
|
|
(defun safe-documentation (function)
|
|
"Like documentation, except it avoids calling `get_doc_string'.
|
|
Will return nil instead."
|
|
(while (symbolp function)
|
|
(setq function (if (fboundp function)
|
|
(symbol-function function)
|
|
0)))
|
|
(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)
|
|
nil
|
|
symbol))
|
|
|
|
;;; apropos.el ends here
|