mirror of
https://git.savannah.gnu.org/git/emacs.git
synced 2024-12-29 11:02:01 +00:00
609 lines
22 KiB
EmacsLisp
609 lines
22 KiB
EmacsLisp
;;; isearch.el --- incremental search commands
|
|
|
|
;; Copyright (C) 1985, 1986 Free Software Foundation, Inc.
|
|
|
|
;; Maintainer: FSF
|
|
|
|
;; 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.
|
|
|
|
;;; Code:
|
|
|
|
(defvar search-last-string "" "\
|
|
Last string search for by a non-regexp search command.
|
|
This does not include direct calls to the primitive search functions,
|
|
and does not include searches that are aborted.")
|
|
|
|
(defvar search-last-regexp "" "\
|
|
Last string searched for by a regexp search command.
|
|
This does not include direct calls to the primitive search functions,
|
|
and does not include searches that are aborted.")
|
|
|
|
|
|
(defconst search-repeat-char ?\C-s "\
|
|
*Character to repeat incremental search forwards.")
|
|
(defconst search-reverse-char ?\C-r "\
|
|
*Character to repeat incremental search backwards.")
|
|
(defconst search-exit-char ?\C-m "\
|
|
*Character to exit incremental search.")
|
|
(defconst search-delete-char ?\177 "\
|
|
*Character to delete from incremental search string.")
|
|
(defconst search-quote-char ?\C-q "\
|
|
*Character to quote special characters for incremental search.")
|
|
(defconst search-yank-word-char ?\C-w "\
|
|
*Character to pull next word from buffer into search string.")
|
|
(defconst search-yank-line-char ?\C-y "\
|
|
*Character to pull rest of line from buffer into search string.")
|
|
(defconst search-ring-advance-char ?\M-n "\
|
|
*Character to pull next (more recent) search string from the ring of same.")
|
|
(defconst search-ring-retreat-char ?\M-p "\
|
|
*Character to pull previous (older) search string from the ring of same.")
|
|
|
|
(defconst search-exit-option t "\
|
|
*Non-nil means random control characters terminate incremental search.")
|
|
|
|
(defvar search-slow-window-lines 1 "\
|
|
*Number of lines in slow search display windows.
|
|
These are the short windows used during incremental search on slow terminals.
|
|
Negative means put the slow search window at the top (normally it's at bottom)
|
|
and the value is minus the number of lines.")
|
|
|
|
(defvar search-slow-speed 1200 "\
|
|
*Highest terminal speed at which to use \"slow\" style incremental search.
|
|
This is the style where a one-line window is created to show the line
|
|
that the search has reached.")
|
|
|
|
(defconst search-upper-case t
|
|
"*Non-nil means an upper-case letter as search input means case-sensitive.
|
|
Any upper-case letter given explicitly as input to the incremental search
|
|
has the effect of turning off `case-fold-search' for the rest of this search.
|
|
Deleting the letter from the search string cancels the effect.")
|
|
|
|
(fset 'search-forward-regexp 're-search-forward)
|
|
(fset 'search-backward-regexp 're-search-backward)
|
|
|
|
(defvar search-ring nil
|
|
"List of recent non-regexp incremental searches.
|
|
Each element is a cons cell of the form (STRING . UPPERCASE-FLAG).")
|
|
|
|
(defvar regexp-search-ring nil
|
|
"List of recent regexp incremental searches.
|
|
Each element is a cons cell of the form (STRING . UPPERCASE-FLAG).")
|
|
|
|
(defconst search-ring-max 16
|
|
"*Maximum length of search ring before oldest elements are thrown away.")
|
|
|
|
(defvar search-ring-yank-pointer nil
|
|
"The tail of the search ring whose car is the last thing searched for.")
|
|
|
|
(defvar regexp-search-ring-yank-pointer nil
|
|
"The tail of the regular expression search ring whose car is the last
|
|
thing searched for.")
|
|
|
|
|
|
(defun isearch-forward ()
|
|
"Do incremental search forward.
|
|
As you type characters, they add to the search string and are found.
|
|
Type Delete to cancel characters from end of search string.
|
|
Type RET to exit, leaving point at location found.
|
|
Type C-s to search again forward, C-r to search again backward.
|
|
Type C-w to yank word from buffer onto end of search string and search for it.
|
|
Type C-y to yank rest of line onto end of search string, etc.
|
|
Type C-q to quote control character to search for it.
|
|
Other control and meta characters terminate the search
|
|
and are then executed normally.
|
|
The above special characters are mostly controlled by parameters;
|
|
do M-x apropos on search-.*-char to find them.
|
|
C-g while searching or when search has failed
|
|
cancels input back to what has been found successfully.
|
|
C-g when search is successful aborts and moves point to starting point."
|
|
(interactive)
|
|
(isearch t))
|
|
(define-key global-map "\C-s" 'isearch-forward)
|
|
|
|
(defun isearch-forward-regexp ()
|
|
"Do incremental search forward for regular expression.
|
|
Like ordinary incremental search except that your input
|
|
is treated as a regexp. See \\[isearch-forward] for more info."
|
|
(interactive)
|
|
(isearch t t))
|
|
(define-key esc-map "\C-s" 'isearch-forward-regexp)
|
|
|
|
(defun isearch-backward ()
|
|
"Do incremental search backward.
|
|
See \\[isearch-forward] for more information."
|
|
(interactive)
|
|
(isearch nil))
|
|
(define-key global-map "\C-r" 'isearch-backward)
|
|
|
|
(defun isearch-backward-regexp ()
|
|
"Do incremental search backward for regular expression.
|
|
Like ordinary incremental search except that your input
|
|
is treated as a regexp. See \\[isearch-forward] for more info."
|
|
(interactive)
|
|
(isearch nil t))
|
|
(define-key esc-map "\C-r" 'isearch-backward-regexp)
|
|
|
|
|
|
;; This function does all the work of incremental search.
|
|
;; The functions attached to ^R and ^S are trivial,
|
|
;; merely calling this one, but they are always loaded by default
|
|
;; whereas this file can optionally be autoloadable.
|
|
;; This is the only entry point in this file.
|
|
|
|
;; OP-FUN is a function to be called after each input character is processed.
|
|
;; (It is not called after characters that exit the search.)
|
|
|
|
(defun isearch (forward &optional regexp op-fun)
|
|
(let ((search-string "")
|
|
(search-message "")
|
|
;; List of previous states during this search.
|
|
(history nil)
|
|
;; t means search is currently successful.
|
|
(success t)
|
|
;; Set once the search has wrapped around the end of the buffer.
|
|
(wrapped nil)
|
|
;; Nominal starting point for searching
|
|
;; Usually this is the same as the opoint,
|
|
;; but it is changed by wrapping
|
|
;; and also by repeating the search.
|
|
(barrier (point))
|
|
;; Set temporarily when adding a character to a regexp
|
|
;; enables it to match more rather than fewer places in the buffer.
|
|
liberalized
|
|
;; Set temporarily by yanking text into the search string.
|
|
yank-flag
|
|
(invalid-regexp nil)
|
|
;; non-nil means an explicit uppercase letter seen in the input
|
|
(uppercase-flag nil)
|
|
;; Non-nil means start using a small window
|
|
;; if the search moves outside what is currently on the frame.
|
|
(slow-terminal-mode (and (<= baud-rate search-slow-speed)
|
|
(> (window-height)
|
|
(* 4 search-slow-window-lines))))
|
|
;; t means a small window is currently in use.
|
|
(small-window nil) ;if t, using a small window
|
|
;; These variables preserve information from the small window
|
|
;; through exit from the save-window-excursion.
|
|
(found-point nil)
|
|
(found-start nil)
|
|
;; Point is at one end of the last match.
|
|
;; This variable records the other end of that match.
|
|
(other-end nil)
|
|
;; Value of point at start of search,
|
|
;; for moving the cursor back on quitting.
|
|
(opoint (point))
|
|
(inhibit-quit t) ;Prevent ^G from quitting, so we can read it.
|
|
;; The frame we're working on; if this changes, we exit isearch.
|
|
(frame (if (fboundp 'selected-frame) (selected-frame))))
|
|
|
|
(isearch-push-state)
|
|
(save-window-excursion
|
|
(catch 'search-done
|
|
(while t
|
|
(or (and (numberp unread-command-char) (>= unread-command-char 0))
|
|
(progn
|
|
(or (input-pending-p)
|
|
(isearch-message))
|
|
(if (and slow-terminal-mode
|
|
(not (or small-window (pos-visible-in-window-p))))
|
|
(progn
|
|
(setq small-window t)
|
|
(setq found-point (point))
|
|
(move-to-window-line 0)
|
|
(let ((window-min-height 1))
|
|
(split-window nil (if (< search-slow-window-lines 0)
|
|
(1+ (- search-slow-window-lines))
|
|
(- (window-height)
|
|
(1+ search-slow-window-lines)))))
|
|
(if (< search-slow-window-lines 0)
|
|
(progn (vertical-motion (- 1 search-slow-window-lines))
|
|
(set-window-start (next-window) (point))
|
|
(set-window-hscroll (next-window)
|
|
(window-hscroll))
|
|
(set-window-hscroll (selected-window) 0))
|
|
(other-window 1))
|
|
(goto-char found-point)))))
|
|
(let ((char (if quit-flag
|
|
?\C-g
|
|
(read-event))))
|
|
(setq quit-flag nil liberalized nil yank-flag nil)
|
|
(cond ((and (or (not (integerp char))
|
|
(and (>= char 128)
|
|
(not (= char search-ring-advance-char))
|
|
(not (= char search-ring-retreat-char))))
|
|
search-exit-option)
|
|
(setq unread-command-char char)
|
|
(throw 'search-done t))
|
|
|
|
;; If the user switches to a different frame, exit.
|
|
((not (eq frame last-event-frame))
|
|
(setq unread-command-char char)
|
|
(throw 'search-done t))
|
|
|
|
((eq char search-exit-char)
|
|
;; RET means exit search normally.
|
|
;; Except, if first thing typed, it means do nonincremental
|
|
(if (= 0 (length search-string))
|
|
(nonincremental-search forward regexp))
|
|
(throw 'search-done t))
|
|
((= char ?\C-g)
|
|
;; ^G means the user tried to quit.
|
|
(ding)
|
|
(discard-input)
|
|
(if success
|
|
;; If search is successful, move back to starting point
|
|
;; and really do quit.
|
|
(progn (goto-char opoint)
|
|
(signal 'quit nil))
|
|
;; If search is failing, rub out until it is once more
|
|
;; successful.
|
|
(while (not success) (isearch-pop))))
|
|
((or (eq char search-repeat-char)
|
|
(eq char search-reverse-char))
|
|
(if (eq forward (eq char search-repeat-char))
|
|
;; C-s in forward or C-r in reverse.
|
|
(if (equal search-string "")
|
|
;; If search string is empty, use last one.
|
|
(isearch-get-string-from-ring)
|
|
;; If already have what to search for, repeat it.
|
|
(or success
|
|
(progn (goto-char (if forward (point-min) (point-max)))
|
|
(setq wrapped t))))
|
|
;; C-s in reverse or C-r in forward, change direction.
|
|
(setq forward (not forward)))
|
|
(setq barrier (point)) ; For subsequent \| if regexp.
|
|
(setq success t)
|
|
(or (equal search-string "")
|
|
(progn
|
|
;; If repeating a search that found an empty string,
|
|
;; ensure we advance. Test history to make sure we
|
|
;; actually have done a search already; otherwise,
|
|
;; the match data will be random.
|
|
(if (and (cdr history)
|
|
(= (match-end 0) (match-beginning 0)))
|
|
(forward-char (if forward 1 -1)))
|
|
(isearch-search)))
|
|
(isearch-push-state))
|
|
((= char search-delete-char)
|
|
;; Rubout means discard last input item and move point
|
|
;; back. If buffer is empty, just beep.
|
|
(if (null (cdr history))
|
|
(ding)
|
|
(isearch-pop)))
|
|
((= char search-ring-advance-char)
|
|
(isearch-pop)
|
|
(if regexp
|
|
(let ((length (length regexp-search-ring)))
|
|
(if (zerop length)
|
|
()
|
|
(setq regexp-search-ring-yank-pointer
|
|
(nthcdr (% (+ 1 (- length (length regexp-search-ring-yank-pointer)))
|
|
length)
|
|
regexp-search-ring))
|
|
(isearch-get-string-from-ring)))
|
|
(let ((length (length search-ring)))
|
|
(if (zerop length)
|
|
()
|
|
(setq search-ring-yank-pointer
|
|
(nthcdr (% (+ 1 (- length (length search-ring-yank-pointer)))
|
|
length)
|
|
search-ring))
|
|
(isearch-get-string-from-ring))))
|
|
(isearch-push-state)
|
|
(isearch-search))
|
|
((= char search-ring-retreat-char)
|
|
(isearch-pop)
|
|
(if regexp
|
|
(let ((length (length regexp-search-ring)))
|
|
(if (zerop length)
|
|
()
|
|
(setq regexp-search-ring-yank-pointer
|
|
(nthcdr (% (+ (- length (length regexp-search-ring-yank-pointer))
|
|
(1- length))
|
|
length)
|
|
regexp-search-ring))
|
|
(isearch-get-string-from-ring)))
|
|
(let ((length (length search-ring)))
|
|
(if (zerop length)
|
|
()
|
|
(setq search-ring-yank-pointer
|
|
(nthcdr (% (+ (- length (length search-ring-yank-pointer))
|
|
(1- length))
|
|
length)
|
|
search-ring))
|
|
(isearch-get-string-from-ring))))
|
|
(isearch-push-state)
|
|
(isearch-search))
|
|
(t
|
|
(cond ((or (eq char search-yank-word-char)
|
|
(eq char search-yank-line-char))
|
|
;; ^W means gobble next word from buffer.
|
|
;; ^Y means gobble rest of line from buffer.
|
|
(let ((word (save-excursion
|
|
(and (not forward) other-end
|
|
(goto-char other-end))
|
|
(buffer-substring
|
|
(point)
|
|
(save-excursion
|
|
(if (eq char search-yank-line-char)
|
|
(end-of-line)
|
|
(forward-word 1))
|
|
(point))))))
|
|
(if regexp
|
|
(setq word (regexp-quote word)))
|
|
(setq search-string (concat search-string word)
|
|
search-message
|
|
(concat search-message
|
|
(mapconcat 'text-char-description
|
|
word ""))
|
|
;; Don't move cursor in reverse search.
|
|
yank-flag t)))
|
|
;; Any other control char =>
|
|
;; unread it and exit the search normally.
|
|
((and search-exit-option
|
|
(/= char search-quote-char)
|
|
(or (>= char ?\177)
|
|
(and (< char ? )
|
|
(/= char ?\t)
|
|
(/= char ?\n))))
|
|
(setq unread-command-char char)
|
|
(throw 'search-done t))
|
|
(t
|
|
;; Any other character => add it to the
|
|
;; search string and search.
|
|
(cond ((= char search-quote-char)
|
|
(setq char (read-quoted-char
|
|
(isearch-message t))))
|
|
((= char ?\r)
|
|
;; RET translates to newline.
|
|
(setq char ?\n)))
|
|
(setq search-string (concat search-string
|
|
(char-to-string char))
|
|
search-message (concat search-message
|
|
(text-char-description char))
|
|
uppercase-flag (or uppercase-flag
|
|
(not (= char (downcase char)))))))
|
|
(if (and (not success)
|
|
;; unsuccessful regexp search may become
|
|
;; successful by addition of characters which
|
|
;; make search-string valid
|
|
(not regexp))
|
|
nil
|
|
;; Check for chars that can make a regexp more liberal.
|
|
;; They can make a regexp match sooner
|
|
;; or make it succeed instead of failing.
|
|
;; So go back to place last successful search started
|
|
;; or to the last ^S/^R (barrier), whichever is nearer.
|
|
(and regexp history
|
|
(cond ((and (memq char '(?* ??))
|
|
;; Don't treat *, ? as special
|
|
;; within [] or after \.
|
|
(not (nth 6 (car history))))
|
|
(setq liberalized t)
|
|
;; This used to use element 2
|
|
;; in a reverse search, but it seems that 5
|
|
;; (which is the end of the old match)
|
|
;; is better in that case too.
|
|
(let ((cs (nth 5 ; old other-end.
|
|
(car (cdr history)))))
|
|
;; (car history) is after last search;
|
|
;; (car (cdr history)) is from before it.
|
|
(setq cs (or cs barrier))
|
|
(goto-char
|
|
(if forward
|
|
(max cs barrier)
|
|
(min cs barrier)))))
|
|
((eq char ?\|)
|
|
(setq liberalized t)
|
|
(goto-char barrier))))
|
|
;; Turn off case-sensitivity if string requests it.
|
|
(let ((case-fold-search
|
|
(and case-fold-search
|
|
(not (and uppercase-flag
|
|
search-upper-case)))))
|
|
;; In reverse search, adding stuff at
|
|
;; the end may cause zero or many more chars to be
|
|
;; matched, in the string following point.
|
|
;; Allow all those possibilities without moving point as
|
|
;; long as the match does not extend past search origin.
|
|
(if (and (not forward) (not liberalized)
|
|
(condition-case ()
|
|
(looking-at (if regexp search-string
|
|
(regexp-quote search-string)))
|
|
(error nil))
|
|
(or yank-flag
|
|
;; Used to have (min opoint barrier)
|
|
;; instead of barrier.
|
|
;; This lost when wrapping.
|
|
(<= (match-end 0) barrier)))
|
|
(setq success t invalid-regexp nil
|
|
other-end (match-end 0))
|
|
;; Not regexp, not reverse, or no match at point.
|
|
(if (and other-end (not liberalized))
|
|
(goto-char (if forward other-end
|
|
;; Used to have opoint inside the min.
|
|
;; This lost when wrapping.
|
|
(min barrier (1+ other-end)))))
|
|
(isearch-search))))
|
|
(isearch-push-state))))
|
|
(if op-fun (funcall op-fun))))
|
|
(setq found-start (window-start (selected-window)))
|
|
(setq found-point (point)))
|
|
(if (> (length search-string) 0)
|
|
(if (and regexp (not (member search-string regexp-search-ring)))
|
|
(progn
|
|
(setq regexp-search-ring (cons (cons search-string uppercase-flag)
|
|
regexp-search-ring)
|
|
regexp-search-ring-yank-pointer regexp-search-ring)
|
|
(if (> (length regexp-search-ring) search-ring-max)
|
|
(setcdr (nthcdr (1- search-ring-max) regexp-search-ring) nil)))
|
|
(if (not (member search-string search-ring))
|
|
(progn
|
|
(setq search-ring (cons (cons search-string uppercase-flag)
|
|
search-ring)
|
|
search-ring-yank-pointer search-ring)
|
|
(if (> (length search-ring) search-ring-max)
|
|
(setcdr (nthcdr (1- search-ring-max) search-ring) nil))))))
|
|
;; If we displayed a single-line window, set point in this window.
|
|
(if small-window
|
|
(goto-char found-point))
|
|
;; If there was movement, mark the starting position.
|
|
;; Maybe should test difference between and set mark iff > threshold.
|
|
(if (/= (point) opoint)
|
|
(push-mark opoint)
|
|
(message ""))
|
|
(or small-window
|
|
;; Exiting the save-window-excursion clobbers this; restore it.
|
|
(set-window-start (selected-window) found-start t))))
|
|
|
|
(defun isearch-message (&optional c-q-hack ellipsis)
|
|
;; If about to search, and previous search regexp was invalid,
|
|
;; check that it still is. If it is valid now,
|
|
;; let the message we display while searching say that it is valid.
|
|
(and invalid-regexp ellipsis
|
|
(condition-case ()
|
|
(progn (re-search-forward search-string (point) t)
|
|
(setq invalid-regexp nil))
|
|
(error nil)))
|
|
;; If currently failing, display no ellipsis.
|
|
(or success (setq ellipsis nil))
|
|
(let ((m (concat (if success "" "failing ")
|
|
(if wrapped "wrapped ")
|
|
(if (or (not case-fold-search)
|
|
(and uppercase-flag search-upper-case))
|
|
"case-sensitive ")
|
|
(if regexp "regexp " "")
|
|
"I-search"
|
|
(if forward ": " " backward: ")
|
|
search-message
|
|
(if c-q-hack "^Q" "")
|
|
(if invalid-regexp
|
|
(concat " [" invalid-regexp "]")
|
|
""))))
|
|
(aset m 0 (upcase (aref m 0)))
|
|
(let ((cursor-in-echo-area ellipsis))
|
|
(if c-q-hack m (message "%s" m)))))
|
|
|
|
;; Get the search string from the "front" of the ring of previous searches.
|
|
(defun isearch-get-string-from-ring ()
|
|
(let ((elt (car (if regexp
|
|
(or regexp-search-ring-yank-pointer regexp-search-ring)
|
|
(or search-ring-yank-pointer search-ring)))))
|
|
;; ELT describes the most recent search or where we have rotated the ring.
|
|
(if elt
|
|
(setq search-string (car elt)
|
|
uppercase-flag (cdr elt))
|
|
(setq search-string "" uppercase-flag nil)))
|
|
;; Let's give this one the benefit of the doubt.
|
|
(setq invalid-regexp nil)
|
|
(setq search-message (mapconcat 'text-char-description search-string "")))
|
|
|
|
(defun isearch-pop ()
|
|
(setq history (cdr history))
|
|
(let ((cmd (car history)))
|
|
(setq search-string (car cmd)
|
|
search-message (car (cdr cmd))
|
|
success (nth 3 cmd)
|
|
forward (nth 4 cmd)
|
|
other-end (nth 5 cmd)
|
|
invalid-regexp (nth 6 cmd)
|
|
wrapped (nth 7 cmd)
|
|
barrier (nth 8 cmd)
|
|
uppercase-flag (nth 9 cmd))
|
|
(goto-char (car (cdr (cdr cmd))))))
|
|
|
|
(defun isearch-push-state ()
|
|
(setq history (cons (list search-string search-message (point)
|
|
success forward other-end invalid-regexp
|
|
wrapped barrier uppercase-flag)
|
|
history)))
|
|
|
|
(defun isearch-search ()
|
|
(let ((case-fold-search
|
|
(and case-fold-search
|
|
(not (and uppercase-flag
|
|
search-upper-case)))))
|
|
(isearch-message nil t)
|
|
(condition-case lossage
|
|
(let ((inhibit-quit nil))
|
|
(if regexp (setq invalid-regexp nil))
|
|
(setq success
|
|
(funcall
|
|
(if regexp
|
|
(if forward 're-search-forward 're-search-backward)
|
|
(if forward 'search-forward 'search-backward))
|
|
search-string nil t))
|
|
(if success
|
|
(setq other-end
|
|
(if forward (match-beginning 0) (match-end 0)))))
|
|
(quit (setq unread-command-char ?\C-g)
|
|
(setq success nil))
|
|
(invalid-regexp (setq invalid-regexp (car (cdr lossage)))
|
|
(if (string-match "\\`Premature \\|\\`Unmatched \\|\\`Invalid "
|
|
invalid-regexp)
|
|
(setq invalid-regexp "incomplete input"))))
|
|
(if success
|
|
nil
|
|
;; Ding if failed this time after succeeding last time.
|
|
(and (nth 3 (car history))
|
|
(ding))
|
|
(goto-char (nth 2 (car history))))))
|
|
|
|
;; This is called from incremental-search
|
|
;; if the first input character is the exit character.
|
|
;; The interactive-arg-reader uses free variables `forward' and `regexp'
|
|
;; which are bound by `incremental-search'.
|
|
|
|
;; We store the search string in `search-string'
|
|
;; which has been bound already by `incremental-search'
|
|
;; so that, when we exit, it is copied into `search-last-string'.
|
|
|
|
(defun nonincremental-search (forward regexp)
|
|
(let (message char function string inhibit-quit)
|
|
(let ((cursor-in-echo-area t))
|
|
;; Prompt assuming not word search,
|
|
(setq message (if regexp
|
|
(if forward "Regexp search: "
|
|
"Regexp search backward: ")
|
|
(if forward "Search: " "Search backward: ")))
|
|
(message "%s" message)
|
|
;; Read 1 char and switch to word search if it is ^W.
|
|
(setq char (read-event)))
|
|
(if (and (numberp char) (eq char search-yank-word-char))
|
|
(setq message (if forward "Word search: " "Word search backward: "))
|
|
;; Otherwise let that 1 char be part of the search string.
|
|
(setq unread-command-char char))
|
|
(setq function
|
|
(if (eq char search-yank-word-char)
|
|
(if forward 'word-search-forward 'word-search-backward)
|
|
(if regexp
|
|
(if forward 're-search-forward 're-search-backward)
|
|
(if forward 'search-forward 'search-backward))))
|
|
;; Read the search string with corrected prompt.
|
|
(setq string (read-string message))
|
|
;; Empty means use default.
|
|
(if (= 0 (length string))
|
|
(setq string search-last-string)
|
|
;; Set last search string now so it is set even if we fail.
|
|
(setq search-last-string string))
|
|
;; Since we used the minibuffer, we should be available for redo.
|
|
(setq command-history (cons (list function string) command-history))
|
|
;; Go ahead and search.
|
|
(funcall function string)))
|
|
|
|
;;; isearch.el ends here
|