| blob | dc10502309f10b808d1262863b440cefeb9abad7 |
1 ;;; isearch.el --- incremental search minor mode
3 ;; Copyright (C) 1992-1997, 1999-2015 Free Software Foundation, Inc.
5 ;; Author: Daniel LaLiberte <liberte@cs.uiuc.edu>
6 ;; Maintainer: emacs-devel@gnu.org
7 ;; Keywords: matching
8 ;; Package: emacs
10 ;; This file is part of GNU Emacs.
12 ;; GNU Emacs is free software: you can redistribute it and/or modify
13 ;; it under the terms of the GNU General Public License as published by
14 ;; the Free Software Foundation, either version 3 of the License, or
15 ;; (at your option) any later version.
17 ;; GNU Emacs is distributed in the hope that it will be useful,
18 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
19 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 ;; GNU General Public License for more details.
22 ;; You should have received a copy of the GNU General Public License
23 ;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
25 ;;; Commentary:
27 ;; Instructions
29 ;; For programmed use of isearch-mode, e.g. calling (isearch-forward),
30 ;; isearch-mode behaves modally and does not return until the search
31 ;; is completed. It uses a recursive-edit to behave this way.
33 ;; The key bindings active within isearch-mode are defined below in
34 ;; `isearch-mode-map' which is given bindings close to the default
35 ;; characters of the original isearch.el. With `isearch-mode',
36 ;; however, you can bind multi-character keys and it should be easier
37 ;; to add new commands. One bug though: keys with meta-prefix cannot
38 ;; be longer than two chars. Also see minibuffer-local-isearch-map
39 ;; for bindings active during `isearch-edit-string'.
41 ;; isearch-mode should work even if you switch windows with the mouse,
42 ;; in which case isearch-mode is terminated automatically before the
43 ;; switch.
45 ;; The search ring and completion commands automatically put you in
46 ;; the minibuffer to edit the string. This gives you a chance to
47 ;; modify the search string before executing the search. There are
48 ;; three commands to terminate the editing: C-s and C-r exit the
49 ;; minibuffer and search forward and reverse respectively, while C-m
50 ;; exits and searches in the last search direction.
52 ;; Exiting immediately from isearch uses isearch-edit-string instead
53 ;; of nonincremental-search, if search-nonincremental-instead is non-nil.
54 ;; The name of this option should probably be changed if we decide to
55 ;; keep the behavior. No point in forcing nonincremental search until
56 ;; the last possible moment.
58 ;;; Code:
61 \f
62 ;; Some additional options and constants.
65 "Incremental search minor mode."
74 "Non-nil means random control characters terminate incremental search."
79 "Number of lines in slow search display windows.
80 These are the short windows used during incremental search on slow terminals.
81 Negative means put the slow search window at the top (normally it's at bottom)
82 and the value is minus the number of lines."
88 This is the style where a one-line window is created to show the line
89 that the search has reached."
94 "If non-nil, upper case chars disable case fold searching.
95 That is, upper and lower case chars must match exactly.
96 This applies no matter where the chars come from, but does not
98 If this value is `not-yanks', text yanked into the search string
99 in Isearch mode is always downcased."
106 "If non-nil, do a nonincremental search instead of exiting immediately.
107 Actually, `isearch-edit-string' is called to let you enter the search
108 string, and RET terminates editing and does a nonincremental search."
113 "If non-nil, regular expression to match a sequence of whitespace chars.
114 When you enter a space or spaces in the incremental search, it
115 will match any sequence matched by this regexp. As an exception,
116 spaces are treated normally in regexp incremental search if they
117 occur in a regexp construct like [...] or *, + or ?.
119 If the value is a string, it applies to both ordinary and
120 regexp incremental search. If the value is nil, or
121 `isearch-lax-whitespace' is nil for ordinary incremental search, or
122 `isearch-regexp-lax-whitespace' is nil for regexp incremental search,
123 then each space you type matches literally, against one space.
126 In the Customization buffer, that is `[' followed by a space,
127 a tab, a carriage return (control-M), a newline, and `]+'."
129 regexp)
134 "If t incremental search/query-replace can match hidden text.
135 A nil value means don't match invisible text.
136 When the value is `open', if the text matched is made invisible by
137 an overlay having an `invisible' property and that overlay has a property
138 `isearch-open-invisible', then incremental search will show the contents.
139 \(This applies when using `outline.el' and `hideshow.el'.)
141 To temporarily change the value for an active incremental search,
144 See also the related option `isearch-hide-immediately'.
146 See also `reveal-mode' if you want overlays to automatically be opened
147 whenever point is in one of them."
154 "If non-nil, re-hide an invisible match right away.
155 This variable makes a difference when `search-invisible' is set to `open'.
156 If nil then do not re-hide opened invisible text when the match moves.
157 Whatever the value, all opened invisible text is hidden again after exiting
158 the search."
163 "If non-nil, `isearch-resume' commands are added to the command history.
164 This allows you to resume earlier Isearch sessions through the
165 command history."
176 "Function(s) to call after terminating an incremental search.
177 When these functions are called, `isearch-mode-end-hook-quit'
184 "Function to call to display the search prompt.
188 "Function to call to wrap the search when search is failed.
189 If nil, move point to the beginning of the buffer for a forward search,
193 "Function to save a function restoring the mode-specific Isearch state
197 "Predicate that filters the search hits that would normally be available.
198 Search hits that dissatisfy the predicate are skipped. The function
199 has two arguments: the positions of start and end of text matched by
200 the search. If this function returns nil, continue searching without
201 stopping at this match.
202 If you use `add-function' to modify this variable, you can use the
203 `isearch-message-prefix' advice property to specify the prefix string
206 ;; Search ring.
214 "Maximum length of search ring before oldest elements are thrown away."
218 "Maximum length of regexp search ring before oldest elements are thrown away."
223 "Index in `search-ring' of last string reused.
226 "Index in `regexp-search-ring' of last string reused.
230 "Non-nil if advancing or retreating in the search ring should cause search.
231 Default value, nil, means edit the string instead."
235 ;;; isearch highlight customization.
238 "Non-nil means incremental search highlights the current match."
244 ;; The background must not be too dark, for that means
245 ;; the character is hard to see when the cursor is there.
254 "Face for highlighting Isearch matches."
271 "Face for highlighting failed part in Isearch echo-area message."
276 "Controls the lazy-highlighting during incremental search.
277 When non-nil, all text in the buffer matching the current search
278 string is highlighted lazily (see `lazy-highlight-initial-delay'
279 and `lazy-highlight-interval')."
284 ;;; Lazy highlight customization.
287 "Lazy highlighting feature for matching strings."
294 'lazy-highlight-cleanup
298 "Controls whether to remove extra highlighting after a search.
305 'lazy-highlight-initial-delay
309 "Seconds to wait before beginning to lazily highlight all matches."
314 'lazy-highlight-interval
318 "Seconds between lazily highlighting successive matches."
323 'lazy-highlight-max-at-a-time
327 "Maximum matches to highlight at a time (for `lazy-highlight').
328 Larger values may reduce Isearch's responsiveness to user input;
329 smaller values make matches highlight slowly.
330 A value of nil means highlight all matches."
345 "Face for lazy highlighting of matches other than the current one."
350 'lazy-highlight-face
353 \f
354 ;; Define isearch help map.
360 (define-key map [f1] 'isearch-help-for-help)
361 (define-key map "?" 'isearch-help-for-help)
362 (define-key map "b" 'isearch-describe-bindings)
363 (define-key map "k" 'isearch-describe-key)
364 (define-key map "m" 'isearch-describe-mode)
365 (define-key map "q" 'help-quit)
366 map)
367 "Keymap for characters following the Help key for Isearch mode.")
369 (eval-when-compile (require 'help-macro))
371 (make-help-screen isearch-help-for-help-internal
372 (purecopy "Type a help option: [bkm] or ?")
373 "You have typed %THIS-KEY%, the help character. Type a Help option:
376 b Display all Isearch key bindings.
377 k KEYS Display full documentation of Isearch key sequence.
378 m Display documentation of Isearch mode.
380 You can't type here other help keys available in the global help map,
381 but outside of this help window when you type them in Isearch mode,
382 they exit Isearch mode before displaying global help."
383 isearch-help-map)
385 (defvar isearch--display-help-action '(nil (inhibit-same-window . t)))
387 (defun isearch-help-for-help ()
388 "Display Isearch help menu."
389 (interactive)
390 (let ((display-buffer-overriding-action isearch--display-help-action))
391 (isearch-help-for-help-internal))
392 (isearch-update))
394 (defun isearch-describe-bindings ()
395 "Show a list of all keys defined in Isearch mode, and their definitions.
396 This is like `describe-bindings', but displays only Isearch keys."
397 (interactive)
398 (let ((display-buffer-overriding-action isearch--display-help-action))
399 (with-help-window "*Help*"
400 (with-current-buffer standard-output
404 (defun isearch-describe-key ()
405 "Display documentation of the function invoked by isearch key."
406 (interactive)
407 (let ((display-buffer-overriding-action isearch--display-help-action))
408 (call-interactively 'describe-key))
409 (isearch-update))
411 (defun isearch-describe-mode ()
412 "Display documentation of Isearch mode."
413 (interactive)
414 (let ((display-buffer-overriding-action isearch--display-help-action))
415 (describe-function 'isearch-forward))
416 (isearch-update))
418 (defalias 'isearch-mode-help 'isearch-describe-mode)
420 \f
421 ;; Define isearch-mode keymap.
423 (defvar isearch-mode-map
424 (let ((i 0)
425 (map (make-keymap)))
426 (or (char-table-p (nth 1 map))
427 (error "The initialization of isearch-mode-map must be updated"))
428 ;; Make all multibyte characters search for themselves.
429 (set-char-table-range (nth 1 map) (cons #x100 (max-char))
430 'isearch-printing-char)
432 ;; Single-byte printing chars extend the search string by default.
433 (setq i ?\s)
434 (while (< i 256)
435 (define-key map (vector i) 'isearch-printing-char)
436 (setq i (1+ i)))
438 ;; To handle local bindings with meta char prefix keys, define
439 ;; another full keymap. This must be done for any other prefix
440 ;; keys as well, one full keymap per char of the prefix key. It
441 ;; would be simpler to disable the global keymap, and/or have a
442 ;; default local key binding for any key not otherwise bound.
443 (let ((meta-map (make-sparse-keymap)))
444 (define-key map (char-to-string meta-prefix-char) meta-map))
446 ;; Several non-printing chars change the searching behavior.
447 (define-key map "\C-s" 'isearch-repeat-forward)
448 (define-key map "\C-r" 'isearch-repeat-backward)
449 ;; Define M-C-s and M-C-r like C-s and C-r so that the same key
450 ;; combinations can be used to repeat regexp isearches that can
451 ;; be used to start these searches.
452 (define-key map "\M-\C-s" 'isearch-repeat-forward)
453 (define-key map "\M-\C-r" 'isearch-repeat-backward)
455 (define-key map [backspace] 'undefined) ;bug#20466.
456 (define-key map "\C-g" 'isearch-abort)
458 ;; This assumes \e is the meta-prefix-char.
459 (or (= ?\e meta-prefix-char)
460 (error "Inconsistency in isearch.el"))
461 (define-key map "\e\e\e" 'isearch-cancel)
463 (define-key map "\C-q" 'isearch-quote-char)
466 (define-key map [return] 'isearch-exit)
467 (define-key map "\C-j" 'isearch-printing-char)
469 (define-key map [?\S-\ ] 'isearch-printing-char)
471 (define-key map "\C-w" 'isearch-yank-word-or-char)
472 (define-key map "\M-\C-w" 'isearch-del-char)
473 (define-key map "\M-\C-y" 'isearch-yank-char)
474 (define-key map "\C-y" 'isearch-yank-kill)
475 (define-key map "\M-s\C-e" 'isearch-yank-line)
477 (define-key map (char-to-string help-char) isearch-help-map)
481 (define-key map "\M-n" 'isearch-ring-advance)
482 (define-key map "\M-p" 'isearch-ring-retreat)
483 (define-key map "\M-y" 'isearch-yank-pop)
487 ;; Pass frame events transparently so they won't exit the search.
488 ;; In particular, if we have more than one display open, then a
489 ;; switch-frame might be generated by someone typing at another keyboard.
490 (define-key map [switch-frame] nil)
491 (define-key map [delete-frame] nil)
492 (define-key map [iconify-frame] nil)
493 (define-key map [make-frame-visible] nil)
494 (define-key map [mouse-movement] nil)
495 (define-key map [language-change] nil)
497 ;; For searching multilingual text.
499 (define-key map "\C-^" 'isearch-toggle-specified-input-method)
501 ;; People expect to be able to paste with the mouse.
502 (define-key map [mouse-2] #'isearch-mouse-2)
503 (define-key map [down-mouse-2] nil)
505 ;; Some bindings you may want to put in your isearch-mode-hook.
506 ;; Suggest some alternates...
507 (define-key map "\M-c" 'isearch-toggle-case-fold)
508 (define-key map "\M-r" 'isearch-toggle-regexp)
509 (define-key map "\M-e" 'isearch-edit-string)
511 (put 'isearch-toggle-case-fold :advertised-binding "\M-sc")
512 (put 'isearch-toggle-regexp :advertised-binding "\M-sr")
513 (put 'isearch-edit-string :advertised-binding "\M-se")
515 (define-key map "\M-se" 'isearch-edit-string)
516 (define-key map "\M-sc" 'isearch-toggle-case-fold)
517 (define-key map "\M-si" 'isearch-toggle-invisible)
518 (define-key map "\M-sr" 'isearch-toggle-regexp)
519 (define-key map "\M-sw" 'isearch-toggle-word)
520 (define-key map "\M-s_" 'isearch-toggle-symbol)
521 (define-key map "\M-s " 'isearch-toggle-lax-whitespace)
523 (define-key map [?\M-%] 'isearch-query-replace)
524 (define-key map [?\C-\M-%] 'isearch-query-replace-regexp)
525 (define-key map "\M-so" 'isearch-occur)
526 (define-key map "\M-shr" 'isearch-highlight-regexp)
528 ;; The key translations defined in the C-x 8 prefix should add
529 ;; characters to the search string. See iso-transl.el.
532 map)
533 "Keymap for `isearch-mode'.")
535 (defvar minibuffer-local-isearch-map
536 (let ((map (make-sparse-keymap)))
537 (set-keymap-parent map minibuffer-local-map)
540 (define-key map "\C-s" 'isearch-forward-exit-minibuffer)
541 (define-key map "\C-r" 'isearch-reverse-exit-minibuffer)
542 (define-key map "\C-f" 'isearch-yank-char-in-minibuffer)
543 (define-key map [right] 'isearch-yank-char-in-minibuffer)
544 map)
545 "Keymap for editing Isearch strings in the minibuffer.")
547 ;; Internal variables declared globally for byte-compiler.
548 ;; These are all set with setq while isearching
549 ;; and bound locally while editing the search string.
551 (defvar isearch-forward nil) ; Searching in the forward direction.
552 (defvar isearch-regexp nil) ; Searching for a regexp.
553 (defvar isearch-word nil
554 "Regexp-based search mode for words/symbols.
555 If t, do incremental search for a sequence of words, ignoring punctuation.
556 If the value is a function (e.g. `isearch-symbol-regexp'), it is called to
557 convert the search string to a regexp used by regexp search functions.
558 The property `isearch-message-prefix' put on this function specifies the
559 prefix string displayed in the search message.")
561 (defvar isearch-lax-whitespace t
562 "If non-nil, a space will match a sequence of whitespace chars.
563 When you enter a space or spaces in ordinary incremental search, it
564 will match any sequence matched by the regexp defined by the variable
565 `search-whitespace-regexp'. If the value is nil, each space you type
566 matches literally, against one space. You can toggle the value of this
567 variable by the command `isearch-toggle-lax-whitespace'.")
569 (defvar isearch-regexp-lax-whitespace nil
570 "If non-nil, a space will match a sequence of whitespace chars.
571 When you enter a space or spaces in regexp incremental search, it
572 will match any sequence matched by the regexp defined by the variable
573 `search-whitespace-regexp'. If the value is nil, each space you type
574 matches literally, against one space. You can toggle the value of this
575 variable by the command `isearch-toggle-lax-whitespace'.")
577 (defvar isearch-cmds nil
578 "Stack of search status elements.
579 Each element is an `isearch--state' struct where the slots are
580 [STRING MESSAGE POINT SUCCESS FORWARD OTHER-END WORD
581 ERROR WRAPPED BARRIER CASE-FOLD-SEARCH]")
583 (defvar isearch-string "") ; The current search string.
584 (defvar isearch-message "") ; text-char-description version of isearch-string
586 (defvar isearch-message-prefix-add nil) ; Additional text for the message prefix
587 (defvar isearch-message-suffix-add nil) ; Additional text for the message suffix
589 (defvar isearch-success t) ; Searching is currently successful.
590 (defvar isearch-error nil) ; Error message for failed search.
591 (defvar isearch-other-end nil) ; Start (end) of match if forward (backward).
592 (defvar isearch-wrapped nil) ; Searching restarted from the top (bottom).
593 (defvar isearch-barrier 0
594 "Recorded minimum/maximal point for the current search.")
595 (defvar isearch-just-started nil)
596 (defvar isearch-start-hscroll 0) ; hscroll when starting the search.
598 ;; case-fold-search while searching.
599 ;; either nil, t, or 'yes. 'yes means the same as t except that mixed
600 ;; case in the search string is ignored.
601 (defvar isearch-case-fold-search nil)
603 ;; search-invisible while searching.
604 ;; either nil, t, or 'open. 'open means the same as t except that
605 ;; opens hidden overlays.
606 (defvar isearch-invisible search-invisible)
608 (defvar isearch-last-case-fold-search nil)
610 ;; Used to save default value while isearch is active
611 (defvar isearch-original-minibuffer-message-timeout nil)
613 (defvar isearch-adjusted nil)
614 (defvar isearch-slow-terminal-mode nil)
615 ;; If t, using a small window.
616 (defvar isearch-small-window nil)
617 (defvar isearch-opoint 0)
618 ;; The window configuration active at the beginning of the search.
619 (defvar isearch-window-configuration nil)
621 ;; Flag to indicate a yank occurred, so don't move the cursor.
622 (defvar isearch-yank-flag nil)
624 ;; A function to be called after each input character is processed.
625 ;; (It is not called after characters that exit the search.)
626 ;; It is only set from an optional argument to `isearch-mode'.
627 (defvar isearch-op-fun nil)
629 ;; Is isearch-mode in a recursive edit for modal searching.
630 (defvar isearch-recursive-edit nil)
632 ;; Should isearch be terminated after doing one search?
633 (defvar isearch-nonincremental nil)
635 ;; New value of isearch-forward after isearch-edit-string.
636 (defvar isearch-new-forward nil)
638 ;; Accumulate here the overlays opened during searching.
639 (defvar isearch-opened-overlays nil)
641 ;; Non-nil if the string exists but is invisible.
642 (defvar isearch-hidden nil)
644 ;; The value of input-method-function when isearch is invoked.
645 (defvar isearch-input-method-function nil)
647 ;; A flag to tell if input-method-function is locally bound when
648 ;; isearch is invoked.
649 (defvar isearch-input-method-local-p nil)
651 (defvar isearch--saved-overriding-local-map nil)
653 ;; Minor-mode-alist changes - kind of redundant with the
654 ;; echo area, but if isearching in multiple windows, it can be useful.
656 (or (assq 'isearch-mode minor-mode-alist)
657 (nconc minor-mode-alist
658 (list '(isearch-mode isearch-mode))))
660 (defvar-local isearch-mode nil) ;; Name of the minor mode, if non-nil.
662 (define-key global-map "\C-s" 'isearch-forward)
663 (define-key esc-map "\C-s" 'isearch-forward-regexp)
664 (define-key global-map "\C-r" 'isearch-backward)
665 (define-key esc-map "\C-r" 'isearch-backward-regexp)
666 (define-key search-map "w" 'isearch-forward-word)
667 (define-key search-map "_" 'isearch-forward-symbol)
668 (define-key search-map "." 'isearch-forward-symbol-at-point)
670 ;; Entry points to isearch-mode.
672 (defun isearch-forward (&optional regexp-p no-recursive-edit)
673 "\
674 Do incremental search forward.
675 With a prefix argument, do an incremental regular expression search instead.
677 As you type characters, they add to the search string and are found.
678 The following non-printing keys are bound in `isearch-mode-map'.
682 Type LFD (C-j) to match end of line.
686 onto the end of the search string, and search for it.
689 string and search for it.
691 and search for it.
694 with string killed before it.
697 with completion.
699 back to what has
700 been found successfully.
702 starting point.
704 If you try to exit with the search string still empty, it invokes
705 nonincremental search.
714 In incremental searches, a space or spaces normally matches any whitespace
715 defined by the variable `search-whitespace-regexp'; see also the variables
716 `isearch-lax-whitespace' and `isearch-regexp-lax-whitespace'.
720 Also supported is a search ring of the previous 16 search strings.
723 ring.
727 replace from last search string.
729 with the last search string.
731 the last search string.
733 that highlights the last search string.
739 If an input method is turned on in the current buffer, that input
740 method is also active while you are typing characters to search.
742 It also toggles the input
743 method in the current buffer.
745 To use a different input method for searching, type \
747 and specify an input method you want to use.
749 The above keys, bound in `isearch-mode-map', are often controlled by
751 Other control and meta characters terminate the search
752 and are then executed normally (depending on `search-exit-option').
753 Likewise for function keys and mouse button events.
755 If this function is called non-interactively with a nil NO-RECURSIVE-EDIT,
756 it does not return to the calling function until the search is done.
757 See the function `isearch-mode' for more information."
760 (isearch-mode t (not (null regexp-p)) nil (not no-recursive-edit)))
762 (defun isearch-forward-regexp (&optional not-regexp no-recursive-edit)
763 "Do incremental search forward for regular expression.
764 With a prefix argument, do a regular string search instead.
765 Like ordinary incremental search except that your input is treated
766 as a regexp. See the command `isearch-forward' for more information.
768 In incremental searches, a space or spaces normally matches any
769 whitespace defined by the variable `search-whitespace-regexp'.
770 To search for a literal space and nothing else, enter C-q SPC.
771 To toggle whitespace matching, use `isearch-toggle-lax-whitespace'."
773 (isearch-mode t (null not-regexp) nil (not no-recursive-edit)))
775 (defun isearch-forward-word (&optional not-word no-recursive-edit)
776 "Do incremental search forward for a sequence of words.
777 With a prefix argument, do a regular string search instead.
778 Like ordinary incremental search except that your input is treated
779 as a sequence of words without regard to how the words are separated.
780 See the command `isearch-forward' for more information."
782 (isearch-mode t nil nil (not no-recursive-edit) (null not-word)))
784 (defun isearch-forward-symbol (&optional _not-symbol no-recursive-edit)
785 "Do incremental search forward for a symbol.
786 The prefix argument is currently unused.
787 Like ordinary incremental search except that your input is treated
789 See the command `isearch-forward' for more information."
791 (isearch-mode t nil nil (not no-recursive-edit) 'isearch-symbol-regexp))
793 (defun isearch-backward (&optional regexp-p no-recursive-edit)
794 "Do incremental search backward.
795 With a prefix argument, do a regular expression search instead.
796 See the command `isearch-forward' for more information."
798 (isearch-mode nil (not (null regexp-p)) nil (not no-recursive-edit)))
800 (defun isearch-backward-regexp (&optional not-regexp no-recursive-edit)
801 "Do incremental search backward for regular expression.
802 With a prefix argument, do a regular string search instead.
803 Like ordinary incremental search except that your input is treated
804 as a regexp. See the command `isearch-forward' for more information."
806 (isearch-mode nil (null not-regexp) nil (not no-recursive-edit)))
808 (defun isearch-forward-symbol-at-point ()
809 "Do incremental search forward for a symbol found near point.
810 Like ordinary incremental search except that the symbol found at point
811 is added to the search string initially as a regexp surrounded
813 See the command `isearch-forward-symbol' for more information."
814 (interactive)
815 (isearch-forward-symbol nil 1)
816 (let ((bounds (find-tag-default-bounds)))
817 (cond
818 (bounds
819 (when (< (car bounds) (point))
820 (goto-char (car bounds)))
821 (isearch-yank-string
822 (buffer-substring-no-properties (car bounds) (cdr bounds))))
823 (t
824 (setq isearch-error "No symbol at point")
825 (isearch-update)))))
827 \f
828 (defvar cursor-sensor-inhibit)
829 ;; isearch-mode only sets up incremental search for the minor mode.
830 ;; All the work is done by the isearch-mode commands.
832 ;; Not used yet:
833 ;;(defvar isearch-commands '(isearch-forward isearch-backward
834 ;; isearch-forward-regexp isearch-backward-regexp)
835 ;; "List of commands for which isearch-mode does not recursive-edit.")
838 (defun isearch-mode (forward &optional regexp op-fun recursive-edit word)
839 "Start Isearch minor mode.
840 It is called by the function `isearch-forward' and other related functions.
842 The non-nil arg FORWARD means searching in the forward direction.
844 The non-nil arg REGEXP does an incremental regular expression search.
846 The arg OP-FUN is a function to be called after each input character
847 is processed. (It is not called after characters that exit the search.)
849 When the arg RECURSIVE-EDIT is non-nil, this function behaves modally and
850 does not return to the calling function until the search is completed.
851 To behave this way it enters a recursive-edit and exits it when done
852 isearching.
854 The arg WORD, if t, does incremental search for a sequence of words,
855 ignoring punctuation. If the value is a function, it is called to
856 convert the search string to a regexp used by regexp search functions."
858 ;; Initialize global vars.
859 (setq isearch-forward forward
860 isearch-regexp regexp
861 isearch-word word
862 isearch-op-fun op-fun
863 isearch-last-case-fold-search isearch-case-fold-search
864 isearch-case-fold-search case-fold-search
865 isearch-invisible search-invisible
866 isearch-string ""
867 isearch-message ""
868 isearch-cmds nil
869 isearch-success t
870 isearch-wrapped nil
871 isearch-barrier (point)
872 isearch-adjusted nil
873 isearch-yank-flag nil
874 isearch-error nil
875 isearch-slow-terminal-mode (and (<= baud-rate search-slow-speed)
876 (> (window-height)
877 (* 4
878 (abs search-slow-window-lines))))
879 isearch-other-end nil
880 isearch-small-window nil
881 isearch-just-started t
882 isearch-start-hscroll (window-hscroll)
884 isearch-opoint (point)
885 search-ring-yank-pointer nil
886 isearch-opened-overlays nil
887 isearch-input-method-function input-method-function
888 isearch-input-method-local-p (local-variable-p 'input-method-function)
889 regexp-search-ring-yank-pointer nil
891 ;; Save the original value of `minibuffer-message-timeout', and
892 ;; set it to nil so that isearch's messages don't get timed out.
893 isearch-original-minibuffer-message-timeout minibuffer-message-timeout
894 minibuffer-message-timeout nil)
896 ;; We must bypass input method while reading key. When a user type
897 ;; printable character, appropriate input method is turned on in
898 ;; minibuffer to read multibyte characters.
899 (or isearch-input-method-local-p
900 (make-local-variable 'input-method-function))
901 (setq input-method-function nil)
903 (looking-at "")
904 (setq isearch-window-configuration
905 (if isearch-slow-terminal-mode (current-window-configuration) nil))
907 ;; Maybe make minibuffer frame visible and/or raise it.
908 (let ((frame (window-frame (minibuffer-window))))
909 (unless (memq (frame-live-p frame) '(nil t))
910 (unless (frame-visible-p frame)
911 (make-frame-visible frame))
912 (if minibuffer-auto-raise
913 (raise-frame frame))))
915 (setq isearch-mode " Isearch") ;; forward? regexp?
916 (force-mode-line-update)
918 (setq overriding-terminal-local-map isearch-mode-map)
919 (run-hooks 'isearch-mode-hook)
920 ;; Remember the initial map possibly modified
921 ;; by external packages in isearch-mode-hook. (Bug#16035)
922 (setq isearch--saved-overriding-local-map overriding-terminal-local-map)
924 ;; Pushing the initial state used to be before running isearch-mode-hook,
925 ;; but a hook might set `isearch-push-state-function' used in
926 ;; `isearch-push-state' to save mode-specific initial state. (Bug#4994)
927 (isearch-push-state)
929 (isearch-update)
931 (add-hook 'pre-command-hook 'isearch-pre-command-hook)
932 (add-hook 'post-command-hook 'isearch-post-command-hook)
933 (add-hook 'mouse-leave-buffer-hook 'isearch-done)
934 (add-hook 'kbd-macro-termination-hook 'isearch-done)
935 (make-local-variable 'cursor-sensor-inhibit)
936 (unless (boundp 'cursor-sensor-inhibit)
937 (setq cursor-sensor-inhibit nil))
938 ;; Suspend things like cursor-intangible during Isearch so we can search even
939 ;; within intangible text.
940 (push 'isearch cursor-sensor-inhibit)
942 ;; isearch-mode can be made modal (in the sense of not returning to
943 ;; the calling function until searching is completed) by entering
944 ;; a recursive-edit and exiting it when done isearching.
945 (if recursive-edit
946 (let ((isearch-recursive-edit t))
947 (recursive-edit)))
948 isearch-success)
951 ;; Some high level utilities. Others below.
953 (defun isearch-update ()
954 "This is called after every isearch command to update the display.
955 The last thing it does is to run `isearch-update-post-hook'."
956 (if (and (null unread-command-events)
957 (null executing-kbd-macro))
958 (progn
959 (if (not (input-pending-p))
960 (if isearch-message-function
961 (funcall isearch-message-function)
962 (isearch-message)))
963 (if (and isearch-slow-terminal-mode
964 (not (or isearch-small-window
965 (pos-visible-in-window-p))))
966 (let ((found-point (point)))
967 (setq isearch-small-window t)
968 (move-to-window-line 0)
969 (let ((window-min-height 1))
970 (split-window nil (if (< search-slow-window-lines 0)
971 (1+ (- search-slow-window-lines))
972 (- (window-height)
973 (1+ search-slow-window-lines)))))
974 (if (< search-slow-window-lines 0)
975 (progn (vertical-motion (- 1 search-slow-window-lines))
976 (set-window-start (next-window) (point))
977 (set-window-hscroll (next-window)
978 (window-hscroll))
979 (set-window-hscroll (selected-window) 0))
980 (other-window 1))
981 (goto-char found-point))
982 ;; Keep same hscrolling as at the start of the search when possible
983 (let ((current-scroll (window-hscroll))
984 visible-p)
985 (set-window-hscroll (selected-window) isearch-start-hscroll)
986 (setq visible-p (pos-visible-in-window-p nil nil t))
987 (if (or (not visible-p)
988 ;; When point is not visible because of hscroll,
989 ;; pos-visible-in-window-p returns non-nil, but
990 ;; the X coordinate it returns is 1 pixel beyond
991 ;; the last visible one.
992 (>= (car visible-p) (window-body-width nil t)))
993 (set-window-hscroll (selected-window) current-scroll))))
994 (if isearch-other-end
995 (if (< isearch-other-end (point)) ; isearch-forward?
996 (isearch-highlight isearch-other-end (point))
997 (isearch-highlight (point) isearch-other-end))
998 (isearch-dehighlight))))
999 (setq ;; quit-flag nil not for isearch-mode
1000 isearch-adjusted nil
1001 isearch-yank-flag nil)
1002 (when isearch-lazy-highlight
1003 (isearch-lazy-highlight-new-loop))
1004 ;; We must prevent the point moving to the end of composition when a
1005 ;; part of the composition has just been searched.
1006 (setq disable-point-adjustment t)
1007 (run-hooks 'isearch-update-post-hook))
1009 (defun isearch-done (&optional nopush edit)
1010 "Exit Isearch mode.
1011 For successful search, pass no args.
1012 For a failing search, NOPUSH is t.
1013 For going to the minibuffer to edit the search string,
1014 NOPUSH is t and EDIT is t."
1016 (if isearch-resume-in-command-history
1017 (let ((command `(isearch-resume ,isearch-string ,isearch-regexp
1018 ,isearch-word ,isearch-forward
1019 ,isearch-message
1020 ',isearch-case-fold-search)))
1021 (unless (equal (car command-history) command)
1022 (setq command-history (cons command command-history)))))
1024 (remove-hook 'pre-command-hook 'isearch-pre-command-hook)
1025 (remove-hook 'post-command-hook 'isearch-post-command-hook)
1026 (remove-hook 'mouse-leave-buffer-hook 'isearch-done)
1027 (remove-hook 'kbd-macro-termination-hook 'isearch-done)
1028 (setq isearch-lazy-highlight-start nil)
1029 (setq cursor-sensor-inhibit (delq 'isearch cursor-sensor-inhibit))
1031 ;; Called by all commands that terminate isearch-mode.
1032 ;; If NOPUSH is non-nil, we don't push the string on the search ring.
1033 (setq overriding-terminal-local-map nil)
1034 ;; (setq pre-command-hook isearch-old-pre-command-hook) ; for lemacs
1035 (setq minibuffer-message-timeout isearch-original-minibuffer-message-timeout)
1036 (isearch-dehighlight)
1037 (lazy-highlight-cleanup lazy-highlight-cleanup)
1038 (let ((found-start (window-start))
1039 (found-point (point)))
1040 (when isearch-window-configuration
1041 (set-window-configuration isearch-window-configuration)
1042 (if isearch-small-window
1043 (goto-char found-point)
1044 ;; set-window-configuration clobbers window-start; restore it.
1045 ;; This has an annoying side effect of clearing the last_modiff
1046 ;; field of the window, which can cause unwanted scrolling,
1047 ;; so don't do it unless truly necessary.
1048 (set-window-start (selected-window) found-start t))))
1050 (setq isearch-mode nil)
1051 (if isearch-input-method-local-p
1052 (setq input-method-function isearch-input-method-function)
1053 (kill-local-variable 'input-method-function))
1055 (force-mode-line-update)
1057 ;; If we ended in the middle of some intangible text,
1058 ;; move to the further end of that intangible text.
1059 (let ((after (if (eobp) nil
1060 (get-text-property (point) 'intangible)))
1061 (before (if (bobp) nil
1062 (get-text-property (1- (point)) 'intangible))))
1063 (when (and before after (eq before after))
1064 (goto-char
1065 (if isearch-forward
1066 (next-single-property-change (point) 'intangible)
1067 (previous-single-property-change (point) 'intangible)))))
1069 (if (and (> (length isearch-string) 0) (not nopush))
1070 ;; Update the ring data.
1071 (isearch-update-ring isearch-string isearch-regexp))
1073 (let ((isearch-mode-end-hook-quit (and nopush (not edit))))
1074 (run-hooks 'isearch-mode-end-hook))
1076 ;; If there was movement, mark the starting position.
1077 ;; Maybe should test difference between and set mark only if > threshold.
1078 (if (/= (point) isearch-opoint)
1079 (or (and transient-mark-mode mark-active)
1080 (progn
1081 (push-mark isearch-opoint t)
1082 (or executing-kbd-macro (> (minibuffer-depth) 0) edit
1083 (message "Mark saved where search started")))))
1085 (and (not edit) isearch-recursive-edit (exit-recursive-edit)))
1087 (defun isearch-update-ring (string &optional regexp)
1088 "Add STRING to the beginning of the search ring.
1089 REGEXP if non-nil says use the regexp search ring."
1090 (add-to-history
1091 (if regexp 'regexp-search-ring 'search-ring)
1092 string
1093 (if regexp regexp-search-ring-max search-ring-max)))
1095 ;; Switching buffers should first terminate isearch-mode.
1096 ;; ;; For Emacs 19, the frame switch event is handled.
1097 ;; (defun isearch-switch-frame-handler ()
1098 ;; (interactive) ;; Is this necessary?
1099 ;; ;; First terminate isearch-mode.
1100 ;; (isearch-done)
1101 ;; (isearch-clean-overlays)
1102 ;; (handle-switch-frame (car (cdr last-command-event))))
1104 \f
1105 ;; The search status structure and stack.
1107 (cl-defstruct (isearch--state
1108 (:constructor nil)
1109 (:copier nil)
1110 (:constructor isearch--get-state
1111 (&aux
1112 (string isearch-string)
1113 (message isearch-message)
1114 (point (point))
1115 (success isearch-success)
1116 (forward isearch-forward)
1117 (other-end isearch-other-end)
1118 (word isearch-word)
1119 (error isearch-error)
1120 (wrapped isearch-wrapped)
1121 (barrier isearch-barrier)
1122 (case-fold-search isearch-case-fold-search)
1123 (pop-fun (if isearch-push-state-function
1124 (funcall isearch-push-state-function))))))
1125 (string :read-only t)
1126 (message :read-only t)
1127 (point :read-only t)
1128 (success :read-only t)
1129 (forward :read-only t)
1130 (other-end :read-only t)
1131 (word :read-only t)
1132 (error :read-only t)
1133 (wrapped :read-only t)
1134 (barrier :read-only t)
1135 (case-fold-search :read-only t)
1136 (pop-fun :read-only t))
1138 (defun isearch--set-state (cmd)
1139 (setq isearch-string (isearch--state-string cmd)
1140 isearch-message (isearch--state-message cmd)
1141 isearch-success (isearch--state-success cmd)
1142 isearch-forward (isearch--state-forward cmd)
1143 isearch-other-end (isearch--state-other-end cmd)
1144 isearch-word (isearch--state-word cmd)
1145 isearch-error (isearch--state-error cmd)
1146 isearch-wrapped (isearch--state-wrapped cmd)
1147 isearch-barrier (isearch--state-barrier cmd)
1148 isearch-case-fold-search (isearch--state-case-fold-search cmd))
1149 (if (functionp (isearch--state-pop-fun cmd))
1150 (funcall (isearch--state-pop-fun cmd) cmd))
1151 (goto-char (isearch--state-point cmd)))
1153 (defun isearch-pop-state ()
1154 (setq isearch-cmds (cdr isearch-cmds))
1155 (isearch--set-state (car isearch-cmds)))
1157 (defun isearch-push-state ()
1158 (push (isearch--get-state) isearch-cmds))
1160 \f
1161 ;; Commands active while inside of the isearch minor mode.
1163 (defun isearch-exit ()
1164 "Exit search normally.
1165 However, if this is the first command after starting incremental
1166 search and `search-nonincremental-instead' is non-nil, do a
1167 nonincremental search instead via `isearch-edit-string'."
1168 (interactive)
1169 (if (and search-nonincremental-instead
1170 (= 0 (length isearch-string)))
1171 (let ((isearch-nonincremental t))
1172 (isearch-edit-string)))
1173 (isearch-done)
1174 (isearch-clean-overlays))
1176 (defun isearch-fail-pos (&optional msg)
1177 "Return position of first mismatch in search string, or nil if none.
1178 If MSG is non-nil, use variable `isearch-message', otherwise `isearch-string'."
1179 (let ((cmds isearch-cmds)
1180 (curr-msg (if msg isearch-message isearch-string))
1181 succ-msg)
1182 (when (or (not isearch-success) isearch-error)
1183 (while (and cmds
1184 (or (not (isearch--state-success (car cmds)))
1185 (isearch--state-error (car cmds))))
1186 (pop cmds))
1187 (setq succ-msg (and cmds (if msg (isearch--state-message (car cmds))
1188 (isearch--state-string (car cmds)))))
1189 (if (and (stringp succ-msg)
1190 (< (length succ-msg) (length curr-msg))
1191 (equal succ-msg
1192 (substring curr-msg 0 (length succ-msg))))
1193 (length succ-msg)
1194 0))))
1196 (defmacro with-isearch-suspended (&rest body)
1197 "Exit Isearch mode, run BODY, and reinvoke the pending search.
1198 You can update the global isearch variables by setting new values to
1199 `isearch-new-string', `isearch-new-message', `isearch-new-forward',
1200 `isearch-new-word', `isearch-new-case-fold'."
1201 ;; This code is very hairy for several reasons, explained in the code.
1202 ;; Mainly, isearch-mode must be terminated while editing and then restarted.
1203 ;; If there were a way to catch any change of buffer from the minibuffer,
1204 ;; this could be simplified greatly.
1205 ;; Editing doesn't back up the search point. Should it?
1206 `(condition-case nil
1207 (progn
1208 (let ((isearch-nonincremental isearch-nonincremental)
1210 ;; Locally bind all isearch global variables to protect them
1211 ;; from recursive isearching.
1212 ;; isearch-string -message and -forward are not bound
1213 ;; so they may be changed. Instead, save the values.
1214 (isearch-new-string isearch-string)
1215 (isearch-new-message isearch-message)
1216 (isearch-new-forward isearch-forward)
1217 (isearch-new-word isearch-word)
1218 (isearch-new-case-fold isearch-case-fold-search)
1220 (isearch-regexp isearch-regexp)
1221 (isearch-op-fun isearch-op-fun)
1222 (isearch-cmds isearch-cmds)
1223 (isearch-success isearch-success)
1224 (isearch-wrapped isearch-wrapped)
1225 (isearch-barrier isearch-barrier)
1226 (isearch-adjusted isearch-adjusted)
1227 (isearch-yank-flag isearch-yank-flag)
1228 (isearch-error isearch-error)
1229 ;;; Don't bind this. We want isearch-search, below, to set it.
1230 ;;; And the old value won't matter after that.
1231 ;;; (isearch-other-end isearch-other-end)
1232 ;;; Perhaps some of these other variables should be bound for a
1233 ;;; shorter period, ending before the next isearch-search.
1234 ;;; But there doesn't seem to be a real bug, so let's not risk it now.
1235 (isearch-opoint isearch-opoint)
1236 (isearch-slow-terminal-mode isearch-slow-terminal-mode)
1237 (isearch-small-window isearch-small-window)
1238 (isearch-recursive-edit isearch-recursive-edit)
1239 ;; Save current configuration so we can restore it here.
1240 (isearch-window-configuration (current-window-configuration))
1242 ;; This could protect the index of the search rings,
1243 ;; but we can't reliably count the number of typed M-p
1244 ;; in `read-from-minibuffer' to adjust the index accordingly.
1245 ;; So when the following is commented out, `isearch-mode'
1246 ;; below resets the index to the predictable value nil.
1247 ;; (search-ring-yank-pointer search-ring-yank-pointer)
1248 ;; (regexp-search-ring-yank-pointer regexp-search-ring-yank-pointer)
1250 ;; Temporarily restore `minibuffer-message-timeout'.
1251 (minibuffer-message-timeout
1252 isearch-original-minibuffer-message-timeout)
1253 (isearch-original-minibuffer-message-timeout
1254 isearch-original-minibuffer-message-timeout)
1255 old-point old-other-end)
1257 ;; Actually terminate isearching until editing is done.
1258 ;; This is so that the user can do anything without failure,
1259 ;; like switch buffers and start another isearch, and return.
1260 (condition-case nil
1261 (isearch-done t t)
1262 (exit nil)) ; was recursive editing
1264 ;; Save old point and isearch-other-end before reading from minibuffer
1265 ;; that can change their values.
1266 (setq old-point (point) old-other-end isearch-other-end)
1268 (unwind-protect
1269 (progn ,@body)
1271 ;; Set point at the start (end) of old match if forward (backward),
1272 ;; so after exiting minibuffer isearch resumes at the start (end)
1273 ;; of this match and can find it again.
1274 (if (and old-other-end (eq old-point (point))
1275 (eq isearch-forward isearch-new-forward))
1276 (goto-char old-other-end))
1278 ;; Always resume isearching by restarting it.
1279 (isearch-mode isearch-forward
1280 isearch-regexp
1281 isearch-op-fun
1282 nil
1283 isearch-word)
1285 ;; Copy new local values to isearch globals
1286 (setq isearch-string isearch-new-string
1287 isearch-message isearch-new-message
1288 isearch-forward isearch-new-forward
1289 isearch-word isearch-new-word
1290 isearch-case-fold-search isearch-new-case-fold))
1292 ;; Empty isearch-string means use default.
1293 (when (= 0 (length isearch-string))
1294 (setq isearch-string (or (car (if isearch-regexp
1295 regexp-search-ring
1296 search-ring))
1297 "")
1299 isearch-message
1300 (mapconcat 'isearch-text-char-description
1301 isearch-string ""))
1302 ;; After taking the last element, adjust ring to previous one.
1303 (isearch-ring-adjust1 nil)))
1305 ;; This used to push the state as of before this C-s, but it adds
1306 ;; an inconsistent state where part of variables are from the
1307 ;; previous search (e.g. `isearch-success'), and part of variables
1308 ;; are just entered from the minibuffer (e.g. `isearch-string').
1309 ;; (isearch-push-state)
1311 ;; Reinvoke the pending search.
1312 (isearch-search)
1313 (isearch-push-state) ; this pushes the correct state
1314 (isearch-update)
1315 (if isearch-nonincremental
1316 (progn
1317 ;; (sit-for 1) ;; needed if isearch-done does: (message "")
1318 (isearch-done)
1319 ;; The search done message is confusing when the string
1320 ;; is empty, so erase it.
1321 (if (equal isearch-string "")
1322 (message "")))))
1324 (quit ; handle abort-recursive-edit
1325 (isearch-abort) ;; outside of let to restore outside global values
1326 )))
1328 (defvar minibuffer-history-symbol) ;; from external package gmhist.el
1330 (defun isearch-edit-string ()
1331 "Edit the search string in the minibuffer.
1332 The following additional command keys are active while editing.
1338 (interactive)
1339 (with-isearch-suspended
1340 (let* ((message-log-max nil)
1341 ;; Don't add a new search string to the search ring here
1342 ;; in `read-from-minibuffer'. It should be added only
1343 ;; by `isearch-update-ring' called from `isearch-done'.
1344 (history-add-new-input nil)
1345 ;; Binding minibuffer-history-symbol to nil is a work-around
1346 ;; for some incompatibility with gmhist.
1347 (minibuffer-history-symbol))
1348 (setq isearch-new-string
1349 (read-from-minibuffer
1350 (isearch-message-prefix nil isearch-nonincremental)
1351 (cons isearch-string (1+ (or (isearch-fail-pos)
1352 (length isearch-string))))
1353 minibuffer-local-isearch-map nil
1354 (if isearch-regexp
1355 (cons 'regexp-search-ring
1356 (1+ (or regexp-search-ring-yank-pointer -1)))
1357 (cons 'search-ring
1358 (1+ (or search-ring-yank-pointer -1))))
1359 nil t)
1360 isearch-new-message
1361 (mapconcat 'isearch-text-char-description
1362 isearch-new-string "")))))
1364 (defun isearch-nonincremental-exit-minibuffer ()
1365 (interactive)
1366 (setq isearch-nonincremental t)
1367 (exit-minibuffer))
1368 ;; Changing the value of `isearch-nonincremental' has no effect here,
1369 ;; because `isearch-edit-string' ignores this change. Thus marked as obsolete.
1370 (make-obsolete 'isearch-nonincremental-exit-minibuffer 'exit-minibuffer "24.4")
1372 (defun isearch-forward-exit-minibuffer ()
1373 "Resume isearching forward from the minibuffer that edits the search string."
1374 (interactive)
1375 (setq isearch-new-forward t)
1376 (exit-minibuffer))
1378 (defun isearch-reverse-exit-minibuffer ()
1379 "Resume isearching backward from the minibuffer that edits the search string."
1380 (interactive)
1381 (setq isearch-new-forward nil)
1382 (exit-minibuffer))
1384 (defun isearch-cancel ()
1385 "Terminate the search and go back to the starting point."
1386 (interactive)
1387 (if (and isearch-push-state-function isearch-cmds)
1388 ;; For defined push-state function, restore the first state.
1389 ;; This calls pop-state function and restores original point.
1390 (let ((isearch-cmds (last isearch-cmds)))
1391 (isearch--set-state (car isearch-cmds)))
1392 (goto-char isearch-opoint))
1393 (isearch-done t) ; Exit isearch..
1394 (isearch-clean-overlays)
1395 (signal 'quit nil)) ; ..and pass on quit signal.
1397 (defun isearch-abort ()
1398 "Abort incremental search mode if searching is successful, signaling quit.
1399 Otherwise, revert to previous successful search and continue searching.
1400 Use `isearch-exit' to quit without signaling."
1401 (interactive)
1402 ;; (ding) signal instead below, if quitting
1403 (discard-input)
1404 (if (and isearch-success (not isearch-error))
1405 ;; If search is successful and has no incomplete regexp,
1406 ;; move back to starting point and really do quit.
1407 (progn
1408 (setq isearch-success nil)
1409 (isearch-cancel))
1410 ;; If search is failing, or has an incomplete regexp,
1411 ;; rub out until it is once more successful.
1412 (while (or (not isearch-success) isearch-error)
1413 (isearch-pop-state))
1414 (isearch-update)))
1416 (defun isearch-repeat (direction)
1417 ;; Utility for isearch-repeat-forward and -backward.
1418 (if (eq isearch-forward (eq direction 'forward))
1419 ;; C-s in forward or C-r in reverse.
1420 (if (equal isearch-string "")
1421 ;; If search string is empty, use last one.
1422 (if (null (if isearch-regexp regexp-search-ring search-ring))
1423 (setq isearch-error "No previous search string")
1424 (setq isearch-string
1425 (car (if isearch-regexp regexp-search-ring search-ring))
1426 isearch-message
1427 (mapconcat 'isearch-text-char-description
1428 isearch-string "")
1429 isearch-case-fold-search isearch-last-case-fold-search)
1430 ;; After taking the last element, adjust ring to previous one.
1431 (isearch-ring-adjust1 nil))
1432 ;; If already have what to search for, repeat it.
1433 (or isearch-success
1434 (progn
1435 ;; Set isearch-wrapped before calling isearch-wrap-function
1436 (setq isearch-wrapped t)
1437 (if isearch-wrap-function
1438 (funcall isearch-wrap-function)
1439 (goto-char (if isearch-forward (point-min) (point-max)))))))
1440 ;; C-s in reverse or C-r in forward, change direction.
1441 (setq isearch-forward (not isearch-forward)
1442 isearch-success t))
1444 (setq isearch-barrier (point)) ; For subsequent \| if regexp.
1446 (if (equal isearch-string "")
1447 (setq isearch-success t)
1448 (if (and isearch-success
1449 (equal (point) isearch-other-end)
1450 (not isearch-just-started))
1451 ;; If repeating a search that found
1452 ;; an empty string, ensure we advance.
1453 (if (if isearch-forward (eobp) (bobp))
1454 ;; If there's nowhere to advance to, fail (and wrap next time).
1455 (progn
1456 (setq isearch-success nil)
1457 (ding))
1458 (forward-char (if isearch-forward 1 -1))
1459 (isearch-search))
1460 (isearch-search)))
1462 (isearch-push-state)
1463 (isearch-update))
1465 (defun isearch-repeat-forward ()
1466 "Repeat incremental search forwards."
1467 (interactive)
1468 (isearch-repeat 'forward))
1470 (defun isearch-repeat-backward ()
1471 "Repeat incremental search backwards."
1472 (interactive)
1473 (isearch-repeat 'backward))
1475 (defun isearch-toggle-regexp ()
1476 "Toggle regexp searching on or off."
1477 ;; The status stack is left unchanged.
1478 (interactive)
1479 (setq isearch-regexp (not isearch-regexp))
1480 (if isearch-regexp (setq isearch-word nil))
1481 (setq isearch-success t isearch-adjusted t)
1482 (isearch-update))
1484 (defun isearch-toggle-word ()
1485 "Toggle word searching on or off."
1486 ;; The status stack is left unchanged.
1487 (interactive)
1488 (setq isearch-word (not isearch-word))
1489 (if isearch-word (setq isearch-regexp nil))
1490 (setq isearch-success t isearch-adjusted t)
1491 (isearch-update))
1493 (defun isearch-toggle-symbol ()
1494 "Toggle symbol searching on or off."
1495 (interactive)
1496 (setq isearch-word (unless (eq isearch-word 'isearch-symbol-regexp)
1497 'isearch-symbol-regexp))
1498 (if isearch-word (setq isearch-regexp nil))
1499 (setq isearch-success t isearch-adjusted t)
1500 (isearch-update))
1502 (defun isearch-toggle-lax-whitespace ()
1503 "Toggle whitespace matching in searching on or off.
1504 In ordinary search, toggles the value of the variable
1505 `isearch-lax-whitespace'. In regexp search, toggles the
1506 value of the variable `isearch-regexp-lax-whitespace'."
1507 (interactive)
1508 (if isearch-regexp
1509 (setq isearch-regexp-lax-whitespace (not isearch-regexp-lax-whitespace))
1510 (setq isearch-lax-whitespace (not isearch-lax-whitespace)))
1511 (let ((message-log-max nil))
1512 (message "%s%s [%s]"
1513 (isearch-message-prefix nil isearch-nonincremental)
1514 isearch-message
1515 (if (if isearch-regexp
1516 isearch-regexp-lax-whitespace
1517 isearch-lax-whitespace)
1518 "match spaces loosely"
1519 "match spaces literally")))
1520 (setq isearch-success t isearch-adjusted t)
1521 (sit-for 1)
1522 (isearch-update))
1524 (defun isearch-toggle-case-fold ()
1525 "Toggle case folding in searching on or off.
1526 Toggles the value of the variable `isearch-case-fold-search'."
1527 (interactive)
1528 (setq isearch-case-fold-search
1529 (if isearch-case-fold-search nil 'yes))
1530 (let ((message-log-max nil))
1531 (message "%s%s [case %ssensitive]"
1532 (isearch-message-prefix nil isearch-nonincremental)
1533 isearch-message
1534 (if isearch-case-fold-search "in" "")))
1535 (setq isearch-success t isearch-adjusted t)
1536 (sit-for 1)
1537 (isearch-update))
1539 (defun isearch-toggle-invisible ()
1540 "Toggle searching in invisible text on or off.
1541 Toggles the variable `isearch-invisible' between values
1542 nil and a non-nil value of the option `search-invisible'
1543 \(or `open' if `search-invisible' is nil)."
1544 (interactive)
1545 (setq isearch-invisible
1546 (if isearch-invisible nil (or search-invisible 'open)))
1547 (let ((message-log-max nil))
1548 (message "%s%s [match %svisible text]"
1549 (isearch-message-prefix nil isearch-nonincremental)
1550 isearch-message
1551 (if isearch-invisible "in" "")))
1552 (setq isearch-success t isearch-adjusted t)
1553 (sit-for 1)
1554 (isearch-update))
1556 \f
1557 ;; Word search
1559 (defun word-search-regexp (string &optional lax)
1560 "Return a regexp which matches words, ignoring punctuation.
1561 Given STRING, a string of words separated by word delimiters,
1562 compute a regexp that matches those exact words separated by
1563 arbitrary punctuation. If the string begins or ends in whitespace,
1564 the beginning or the end of the string matches arbitrary whitespace.
1565 Otherwise if LAX is non-nil, the beginning or the end of the string
1566 need not match a word boundary.
1568 Used in `word-search-forward', `word-search-backward',
1569 `word-search-forward-lax', `word-search-backward-lax'."
1570 (cond
1571 ((equal string "") "")
1573 (t (concat
1580 (defun word-search-backward (string &optional bound noerror count)
1581 "Search backward from point for STRING, ignoring differences in punctuation.
1582 Set point to the beginning of the occurrence found, and return point.
1583 An optional second argument bounds the search; it is a buffer position.
1584 The match found must not extend before that position.
1585 Optional third argument, if t, means if fail just return nil (no error).
1586 If not nil and not t, move to limit of search and return nil.
1587 Optional fourth argument is repeat count--search for successive occurrences.
1589 Relies on the function `word-search-regexp' to convert a sequence
1590 of words in STRING to a regexp used to search words without regard
1591 to punctuation."
1592 (interactive "sWord search backward: ")
1593 (re-search-backward (word-search-regexp string nil) bound noerror count))
1595 (defun word-search-forward (string &optional bound noerror count)
1596 "Search forward from point for STRING, ignoring differences in punctuation.
1597 Set point to the end of the occurrence found, and return point.
1598 An optional second argument bounds the search; it is a buffer position.
1599 The match found must not extend after that position.
1600 Optional third argument, if t, means if fail just return nil (no error).
1601 If not nil and not t, move to limit of search and return nil.
1602 Optional fourth argument is repeat count--search for successive occurrences.
1604 Relies on the function `word-search-regexp' to convert a sequence
1605 of words in STRING to a regexp used to search words without regard
1606 to punctuation."
1607 (interactive "sWord search: ")
1608 (re-search-forward (word-search-regexp string nil) bound noerror count))
1610 (defun word-search-backward-lax (string &optional bound noerror count)
1611 "Search backward from point for STRING, ignoring differences in punctuation.
1612 Set point to the beginning of the occurrence found, and return point.
1614 Unlike `word-search-backward', the end of STRING need not match a word
1615 boundary, unless STRING ends in whitespace.
1617 An optional second argument bounds the search; it is a buffer position.
1618 The match found must not extend before that position.
1619 Optional third argument, if t, means if fail just return nil (no error).
1620 If not nil and not t, move to limit of search and return nil.
1621 Optional fourth argument is repeat count--search for successive occurrences.
1623 Relies on the function `word-search-regexp' to convert a sequence
1624 of words in STRING to a regexp used to search words without regard
1625 to punctuation."
1626 (interactive "sWord search backward: ")
1627 (re-search-backward (word-search-regexp string t) bound noerror count))
1629 (defun word-search-forward-lax (string &optional bound noerror count)
1630 "Search forward from point for STRING, ignoring differences in punctuation.
1631 Set point to the end of the occurrence found, and return point.
1633 Unlike `word-search-forward', the end of STRING need not match a word
1634 boundary, unless STRING ends in whitespace.
1636 An optional second argument bounds the search; it is a buffer position.
1637 The match found must not extend after that position.
1638 Optional third argument, if t, means if fail just return nil (no error).
1639 If not nil and not t, move to limit of search and return nil.
1640 Optional fourth argument is repeat count--search for successive occurrences.
1642 Relies on the function `word-search-regexp' to convert a sequence
1643 of words in STRING to a regexp used to search words without regard
1644 to punctuation."
1645 (interactive "sWord search: ")
1646 (re-search-forward (word-search-regexp string t) bound noerror count))
1648 ;; Symbol search
1650 (defun isearch-symbol-regexp (string &optional lax)
1651 "Return a regexp which matches STRING as a symbol.
1653 If there are more than one symbol, then compute a regexp that matches
1654 those exact symbols separated by non-symbol characters. If the string
1655 begins or ends in whitespace, the beginning or the end of the string
1656 matches arbitrary non-symbol whitespace. Otherwise if LAX is non-nil,
1657 the beginning or the end of the string need not match a symbol boundary."
1658 (let ((not-word-symbol-re
1659 ;; This regexp matches all syntaxes except word and symbol syntax.
1660 ;; FIXME: Replace it with something shorter if possible (bug#14602).
1661 "\\(?:\\s-\\|\\s.\\|\\s(\\|\\s)\\|\\s\"\\|\\s\\\\|\\s/\\|\\s$\\|\\s'\\|\\s<\\|\\s>\\|\\s@\\|\\s!\\|\\s|\\)+"))
1662 (cond
1663 ((equal string "") "")
1665 (t (concat
1668 (mapconcat 'regexp-quote (split-string string not-word-symbol-re t) not-word-symbol-re)
1672 (put 'isearch-symbol-regexp 'isearch-message-prefix "symbol ")
1674 ;; Search with lax whitespace
1676 (defun search-forward-lax-whitespace (string &optional bound noerror count)
1677 "Search forward for STRING, matching a sequence of whitespace chars."
1678 (let ((search-spaces-regexp search-whitespace-regexp))
1679 (re-search-forward (regexp-quote string) bound noerror count)))
1681 (defun search-backward-lax-whitespace (string &optional bound noerror count)
1682 "Search backward for STRING, matching a sequence of whitespace chars."
1683 (let ((search-spaces-regexp search-whitespace-regexp))
1684 (re-search-backward (regexp-quote string) bound noerror count)))
1686 (defun re-search-forward-lax-whitespace (regexp &optional bound noerror count)
1687 "Search forward for REGEXP, matching a sequence of whitespace chars."
1688 (let ((search-spaces-regexp search-whitespace-regexp))
1689 (re-search-forward regexp bound noerror count)))
1691 (defun re-search-backward-lax-whitespace (regexp &optional bound noerror count)
1692 "Search backward for REGEXP, matching a sequence of whitespace chars."
1693 (let ((search-spaces-regexp search-whitespace-regexp))
1694 (re-search-backward regexp bound noerror count)))
1696 \f
1697 (defun isearch-query-replace (&optional arg regexp-flag)
1698 "Start `query-replace' with string to replace from last search string.
1699 The ARG (prefix arg if interactive), if non-nil, means replace
1700 only matches surrounded by word boundaries. A negative prefix
1701 arg means replace backward. Note that using the prefix arg
1702 is possible only when `isearch-allow-scroll' is non-nil or
1703 `isearch-allow-prefix' is non-nil, and it doesn't always provide the
1704 correct matches for `query-replace', so the preferred way to run word
1705 replacements from Isearch is `M-s w ... M-%'."
1706 (interactive
1707 (list current-prefix-arg))
1708 (barf-if-buffer-read-only)
1709 (if regexp-flag (setq isearch-regexp t))
1710 (let ((case-fold-search isearch-case-fold-search)
1711 ;; set `search-upper-case' to nil to not call
1712 ;; `isearch-no-upper-case-p' in `perform-replace'
1713 (search-upper-case nil)
1714 (search-invisible isearch-invisible)
1715 (replace-lax-whitespace
1716 isearch-lax-whitespace)
1717 (replace-regexp-lax-whitespace
1718 isearch-regexp-lax-whitespace)
1719 (delimited (and arg (not (eq arg '-))))
1720 (backward (and arg (eq arg '-)))
1721 ;; Set `isearch-recursive-edit' to nil to prevent calling
1722 ;; `exit-recursive-edit' in `isearch-done' that terminates
1723 ;; the execution of this command when it is non-nil.
1724 ;; We call `exit-recursive-edit' explicitly at the end below.
1725 (isearch-recursive-edit nil))
1726 (isearch-done nil t)
1727 (isearch-clean-overlays)
1728 (if (and isearch-other-end
1729 (if backward
1730 (> isearch-other-end (point))
1731 (< isearch-other-end (point)))
1732 (not (and transient-mark-mode mark-active
1733 (if backward
1734 (> (mark) (point))
1735 (< (mark) (point))))))
1736 (goto-char isearch-other-end))
1737 (set query-replace-from-history-variable
1738 (cons isearch-string
1739 (symbol-value query-replace-from-history-variable)))
1740 (perform-replace
1741 isearch-string
1742 (query-replace-read-to
1743 isearch-string
1744 (concat "Query replace"
1745 (if (or delimited isearch-word)
1746 (let* ((symbol (or delimited isearch-word))
1747 (string (and symbol (symbolp symbol)
1748 (get symbol 'isearch-message-prefix))))
1749 (if (stringp string)
1750 ;; Move space from the end to the beginning.
1752 " word"))
1753 "")
1754 (if isearch-regexp " regexp" "")
1755 (if backward " backward" "")
1756 (if (and transient-mark-mode mark-active) " in region" ""))
1757 isearch-regexp)
1758 t isearch-regexp (or delimited isearch-word) nil nil
1759 (if (and transient-mark-mode mark-active) (region-beginning))
1760 (if (and transient-mark-mode mark-active) (region-end))
1761 backward))
1762 (and isearch-recursive-edit (exit-recursive-edit)))
1764 (defun isearch-query-replace-regexp (&optional arg)
1765 "Start `query-replace-regexp' with string to replace from last search string.
1766 See `isearch-query-replace' for more information."
1767 (interactive
1768 (list current-prefix-arg))
1769 (isearch-query-replace arg t))
1771 (defun isearch-occur (regexp &optional nlines)
1772 "Run `occur' using the last search string as the regexp.
1773 Interactively, REGEXP is constructed using the search string from the
1774 last search command. NLINES has the same meaning as in `occur'.
1776 If the last search command was a word search, REGEXP is computed from
1777 the search words, ignoring punctuation. If the last search
1778 command was a regular expression search, REGEXP is the regular
1779 expression used in that search. If the last search command searched
1780 for a literal string, REGEXP is constructed by quoting all the special
1781 characters in that string."
1782 (interactive
1783 (let* ((perform-collect (consp current-prefix-arg))
1784 (regexp (cond
1785 ((functionp isearch-word)
1786 (funcall isearch-word isearch-string))
1787 (isearch-word (word-search-regexp isearch-string))
1788 (isearch-regexp isearch-string)
1789 (t (regexp-quote isearch-string)))))
1790 (list regexp
1791 (if perform-collect
1792 ;; Perform collect operation
1793 (if (zerop (regexp-opt-depth regexp))
1794 ;; No subexpression so collect the entire match.
1796 ;; Get the regexp for collection pattern.
1797 (let ((default (car occur-collect-regexp-history))
1798 regexp-collect)
1799 (with-isearch-suspended
1800 (setq regexp-collect
1801 (read-regexp
1802 (format "Regexp to collect (default %s): " default)
1803 default 'occur-collect-regexp-history)))
1804 regexp-collect))
1805 ;; Otherwise normal occur takes numerical prefix argument.
1806 (when current-prefix-arg
1807 (prefix-numeric-value current-prefix-arg))))))
1808 (let ((case-fold-search isearch-case-fold-search)
1809 ;; Set `search-upper-case' to nil to not call
1810 ;; `isearch-no-upper-case-p' in `occur-1'.
1811 (search-upper-case nil)
1812 (search-spaces-regexp
1813 (if (if isearch-regexp
1814 isearch-regexp-lax-whitespace
1815 isearch-lax-whitespace)
1816 search-whitespace-regexp)))
1817 (occur regexp nlines)))
1819 (declare-function hi-lock-read-face-name "hi-lock" ())
1821 (defun isearch-highlight-regexp ()
1822 "Run `highlight-regexp' with regexp from the current search string.
1823 It exits Isearch mode and calls `hi-lock-face-buffer' with its regexp
1824 argument from the last search regexp or a quoted search string,
1825 and reads its face argument using `hi-lock-read-face-name'."
1826 (interactive)
1827 (let (
1828 ;; Set `isearch-recursive-edit' to nil to prevent calling
1829 ;; `exit-recursive-edit' in `isearch-done' that terminates
1830 ;; the execution of this command when it is non-nil.
1831 ;; We call `exit-recursive-edit' explicitly at the end below.
1832 (isearch-recursive-edit nil))
1833 (isearch-done nil t)
1834 (isearch-clean-overlays))
1835 (require 'hi-lock nil t)
1836 (let ((regexp (cond ((functionp isearch-word)
1837 (funcall isearch-word isearch-string))
1838 (isearch-word (word-search-regexp isearch-string))
1839 (isearch-regexp isearch-string)
1840 ((if (and (eq isearch-case-fold-search t)
1841 search-upper-case)
1842 (isearch-no-upper-case-p
1843 isearch-string isearch-regexp)
1844 isearch-case-fold-search)
1845 ;; Turn isearch-string into a case-insensitive
1846 ;; regexp.
1847 (mapconcat
1848 (lambda (c)
1849 (let ((s (string c)))
1850 (if (string-match "[[:alpha:]]" s)
1851 (format "[%s%s]" (upcase s) (downcase s))
1852 (regexp-quote s))))
1853 isearch-string ""))
1854 (t (regexp-quote isearch-string)))))
1855 (hi-lock-face-buffer regexp (hi-lock-read-face-name)))
1856 (and isearch-recursive-edit (exit-recursive-edit)))
1858 \f
1859 (defun isearch-delete-char ()
1860 "Discard last input item and move point back.
1861 Last input means the last character or the last isearch command
1862 that added or deleted characters from the search string,
1863 moved point, toggled regexp mode or case-sensitivity, etc.
1864 If no previous match was done, just beep."
1865 (interactive)
1866 (if (null (cdr isearch-cmds))
1867 (ding)
1868 (isearch-pop-state))
1869 (isearch-update))
1871 (defun isearch-del-char (&optional arg)
1872 "Delete character from end of search string and search again.
1873 Unlike `isearch-delete-char', it only deletes the last character,
1874 but doesn't cancel the effect of other isearch command.
1875 If search string is empty, just beep."
1876 (interactive "p")
1877 (if (= 0 (length isearch-string))
1878 (ding)
1879 (setq isearch-string (substring isearch-string 0
1880 (- (min (or arg 1)
1881 (length isearch-string))))
1882 isearch-message (mapconcat 'isearch-text-char-description
1883 isearch-string "")))
1884 ;; Use the isearch-other-end as new starting point to be able
1885 ;; to find the remaining part of the search string again.
1886 ;; This is like what `isearch-search-and-update' does,
1887 ;; but currently it doesn't support deletion of characters
1888 ;; for the case where unsuccessful search may become successful
1889 ;; by deletion of characters.
1890 (if isearch-other-end (goto-char isearch-other-end))
1891 (isearch-search)
1892 (isearch-push-state)
1893 (isearch-update))
1895 (defun isearch-yank-string (string)
1896 "Pull STRING into search string."
1897 ;; Downcase the string if not supposed to case-fold yanked strings.
1898 (if (and isearch-case-fold-search
1899 (eq 'not-yanks search-upper-case))
1900 (setq string (downcase string)))
1901 (if isearch-regexp (setq string (regexp-quote string)))
1902 ;; Don't move cursor in reverse search.
1903 (setq isearch-yank-flag t)
1904 (isearch-process-search-string
1905 string (mapconcat 'isearch-text-char-description string "")))
1907 (defun isearch-yank-kill ()
1908 "Pull string from kill ring into search string."
1909 (interactive)
1910 (isearch-yank-string (current-kill 0)))
1912 (defun isearch-yank-pop ()
1913 "Replace just-yanked search string with previously killed string."
1914 (interactive)
1915 (if (not (memq last-command '(isearch-yank-kill isearch-yank-pop)))
1916 ;; Fall back on `isearch-yank-kill' for the benefits of people
1917 ;; who are used to the old behavior of `M-y' in isearch mode. In
1918 ;; future, this fallback may be changed if we ever change
1919 ;; `yank-pop' to do something like the kill-ring-browser.
1920 (isearch-yank-kill)
1921 (isearch-pop-state)
1922 (isearch-yank-string (current-kill 1))))
1924 (defun isearch-yank-x-selection ()
1925 "Pull current X selection into search string."
1926 (interactive)
1927 (isearch-yank-string (gui-get-selection))
1928 ;; If `gui-get-selection' returned the text from the active region,
1929 ;; then it "used" the mark which we should hence deactivate.
1930 (when select-active-regions (deactivate-mark)))
1933 (defun isearch-mouse-2 (click)
1934 "Handle mouse-2 in Isearch mode.
1935 For a click in the echo area, invoke `isearch-yank-x-selection'.
1936 Otherwise invoke whatever the calling mouse-2 command sequence
1937 is bound to outside of Isearch."
1938 (interactive "e")
1939 (let* ((w (posn-window (event-start click)))
1940 (overriding-terminal-local-map nil)
1941 (binding (key-binding (this-command-keys-vector) t)))
1942 (if (and (window-minibuffer-p w)
1943 (not (minibuffer-window-active-p w))) ; in echo area
1944 (isearch-yank-x-selection)
1945 (when (functionp binding)
1946 (call-interactively binding)))))
1948 (defun isearch-yank-internal (jumpform)
1949 "Pull the text from point to the point reached by JUMPFORM.
1950 JUMPFORM is a lambda expression that takes no arguments and returns
1951 a buffer position, possibly having moved point to that position.
1952 For example, it might move point forward by a word and return point,
1953 or it might return the position of the end of the line."
1954 (isearch-yank-string
1955 (save-excursion
1956 (and (not isearch-forward) isearch-other-end
1957 (goto-char isearch-other-end))
1958 (buffer-substring-no-properties (point) (funcall jumpform)))))
1960 (defun isearch-yank-char-in-minibuffer (&optional arg)
1961 "Pull next character from buffer into end of search string in minibuffer."
1962 (interactive "p")
1963 (if (eobp)
1964 (insert
1965 (with-current-buffer (cadr (buffer-list))
1966 (buffer-substring-no-properties
1967 (point) (progn (forward-char arg) (point)))))
1968 (forward-char arg)))
1970 (defun isearch-yank-char (&optional arg)
1971 "Pull next character from buffer into search string.
1972 If optional ARG is non-nil, pull in the next ARG characters."
1973 (interactive "p")
1974 (isearch-yank-internal (lambda () (forward-char arg) (point))))
1976 (declare-function subword-forward "subword" (&optional arg))
1977 (defun isearch-yank-word-or-char ()
1978 "Pull next character, subword or word from buffer into search string.
1979 Subword is used when `subword-mode' is activated. "
1980 (interactive)
1981 (isearch-yank-internal
1982 (lambda ()
1983 (if (or (= (char-syntax (or (char-after) 0)) ?w)
1984 (= (char-syntax (or (char-after (1+ (point))) 0)) ?w))
1985 (if (or (and (boundp 'subword-mode) subword-mode)
1986 (and (boundp 'superword-mode) superword-mode))
1987 (subword-forward 1)
1988 (forward-word 1))
1989 (forward-char 1))
1990 (point))))
1992 (defun isearch-yank-word (&optional arg)
1993 "Pull next word from buffer into search string.
1994 If optional ARG is non-nil, pull in the next ARG words."
1995 (interactive "p")
1996 (isearch-yank-internal (lambda () (forward-word arg) (point))))
1998 (defun isearch-yank-line (&optional arg)
1999 "Pull rest of line from buffer into search string.
2000 If optional ARG is non-nil, yank the next ARG lines."
2001 (interactive "p")
2002 (isearch-yank-internal
2003 (lambda () (let ((inhibit-field-text-motion t))
2004 (line-end-position (if (eolp) (1+ arg) arg))))))
2006 (defun isearch-char-by-name (&optional count)
2007 "Read a character by its Unicode name and add it to the search string.
2008 Completion is available like in `read-char-by-name' used by `insert-char'.
2009 With argument, add COUNT copies of the character."
2010 (interactive "p")
2011 (with-isearch-suspended
2012 (let ((char (read-char-by-name "Add character to search (Unicode name or hex): ")))
2013 (when char
2014 (let ((string (if (and (integerp count) (> count 1))
2015 (make-string count char)
2016 (char-to-string char))))
2017 (setq isearch-new-string (concat isearch-string string)
2018 isearch-new-message (concat isearch-message
2019 (mapconcat 'isearch-text-char-description
2020 string ""))))))))
2022 (defun isearch-search-and-update ()
2023 ;; Do the search and update the display.
2024 (when (or isearch-success
2025 ;; Unsuccessful regexp search may become successful by
2026 ;; addition of characters which make isearch-string valid
2027 isearch-regexp
2028 ;; If the string was found but was completely invisible,
2029 ;; it might now be partly visible, so try again.
2030 (prog1 isearch-hidden (setq isearch-hidden nil)))
2031 ;; In reverse search, adding stuff at
2032 ;; the end may cause zero or many more chars to be
2033 ;; matched, in the string following point.
2034 ;; Allow all those possibilities without moving point as
2035 ;; long as the match does not extend past search origin.
2036 (if (and (not isearch-forward) (not isearch-adjusted)
2037 (condition-case ()
2038 (let ((case-fold-search isearch-case-fold-search))
2039 (if (and (eq case-fold-search t) search-upper-case)
2040 (setq case-fold-search
2041 (isearch-no-upper-case-p isearch-string isearch-regexp)))
2042 (looking-at (cond
2043 ((functionp isearch-word)
2044 (funcall isearch-word isearch-string t))
2045 (isearch-word (word-search-regexp isearch-string t))
2046 (isearch-regexp isearch-string)
2047 (t (regexp-quote isearch-string)))))
2048 (error nil))
2049 (or isearch-yank-flag
2050 (<= (match-end 0)
2051 (min isearch-opoint isearch-barrier))))
2052 (progn
2053 (setq isearch-success t
2054 isearch-error nil
2055 isearch-other-end (match-end 0))
2056 (if (and (eq isearch-case-fold-search t) search-upper-case)
2057 (setq isearch-case-fold-search
2058 (isearch-no-upper-case-p isearch-string isearch-regexp))))
2059 ;; Not regexp, not reverse, or no match at point.
2060 (if (and isearch-other-end (not isearch-adjusted))
2061 (goto-char (if isearch-forward isearch-other-end
2062 (min isearch-opoint
2063 isearch-barrier
2064 (1+ isearch-other-end)))))
2065 (isearch-search)
2066 ))
2067 (isearch-push-state)
2068 (if isearch-op-fun (funcall isearch-op-fun))
2069 (isearch-update))
2072 ;; *, ?, }, and | chars can make a regexp more liberal.
2073 ;; They can make a regexp match sooner or make it succeed instead of failing.
2074 ;; So go back to place last successful search started
2075 ;; or to the last ^S/^R (barrier), whichever is nearer.
2076 ;; + needs no special handling because the string must match at least once.
2078 (defun isearch-backslash (str)
2079 "Return t if STR ends in an odd number of backslashes."
2082 (defun isearch-fallback (want-backslash &optional allow-invalid to-barrier)
2083 "Return point to previous successful match to allow regexp liberalization.
2086 stopping at `isearch-barrier' as needed.
2088 Do nothing if a backslash is escaping the liberalizing character.
2091 Do nothing if regexp has recently been invalid unless optional
2092 ALLOW-INVALID non-nil.
2094 If optional TO-BARRIER non-nil, ignore previous matches and go exactly
2095 to the barrier."
2096 ;; (eq (not a) (not b)) makes all non-nil values equivalent
2097 (when (and isearch-regexp (eq (not (isearch-backslash isearch-string))
2098 (not want-backslash))
2099 ;; We have to check 2 stack frames because the last might be
2100 ;; invalid just because of a backslash.
2101 (or (not isearch-error)
2102 (not (isearch--state-error (cadr isearch-cmds)))
2103 allow-invalid))
2104 (if to-barrier
2105 (progn (goto-char isearch-barrier)
2106 (setq isearch-adjusted t))
2107 (let* ((stack isearch-cmds)
2108 (previous (cdr stack)) ; lookbelow in the stack
2109 (frame (car stack)))
2110 ;; Walk down the stack looking for a valid regexp (as of course only
2111 ;; they can be the previous successful match); this conveniently
2112 ;; removes all bracket-sets and groups that might be in the way, as
2113 ;; well as partial \{\} constructs that the code below leaves behind.
2114 ;; Also skip over postfix operators -- though horrid,
2115 ;; 'ab?\{5,6\}+\{1,2\}*' is perfectly valid.
2116 (while (and previous
2117 (or (isearch--state-error frame)
2118 (let* ((string (isearch--state-string frame))
2119 (lchar (aref string (1- (length string)))))
2120 ;; The operators aren't always operators; check
2121 ;; backslashes. This doesn't handle the case of
2122 ;; operators at the beginning of the regexp not
2123 ;; being special, but then we should fall back to
2124 ;; the barrier anyway because it's all optional.
2125 (if (isearch-backslash
2126 (isearch--state-string (car previous)))
2127 (eq lchar ?\})
2128 (memq lchar '(?* ?? ?+))))))
2129 (setq stack previous previous (cdr previous) frame (car stack)))
2130 (when stack
2131 ;; `stack' now refers the most recent valid regexp that is not at
2132 ;; all optional in its last term. Now dig one level deeper and find
2133 ;; what matched before that.
2134 (let ((last-other-end
2135 (or (and (car previous)
2136 (isearch--state-other-end (car previous)))
2137 isearch-barrier)))
2138 (goto-char (if isearch-forward
2139 (max last-other-end isearch-barrier)
2140 (min last-other-end isearch-barrier)))
2141 (setq isearch-adjusted t)))))))
2143 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
2144 ;; scrolling within Isearch mode. Alan Mackenzie (acm@muc.de), 2003/2/24
2145 ;;
2146 ;; The idea here is that certain vertical scrolling commands (like C-l
2147 ;; `recenter') should be usable WITHIN Isearch mode. For a command to be
2148 ;; suitable, it must NOT alter the buffer, swap to another buffer or frame,
2149 ;; tamper with isearch's state, or move point. It is unacceptable for the
2150 ;; search string to be scrolled out of the current window. If a command
2151 ;; attempts this, we scroll the text back again.
2152 ;;
2153 ;; We implement this feature with a property called `isearch-scroll'.
2154 ;; If a command's symbol has the value t for this property or for the
2155 ;; `scroll-command' property, it is a scrolling command. The feature
2156 ;; needs to be enabled by setting the customizable variable
2157 ;; `isearch-allow-scroll' to a non-nil value.
2158 ;;
2159 ;; The universal argument commands (e.g. C-u) in simple.el are marked
2160 ;; as scrolling commands, and isearch.el has been amended to allow
2161 ;; prefix arguments to be passed through to scrolling commands. Thus
2162 ;; M-0 C-l will scroll point to the top of the window.
2163 ;;
2164 ;; Horizontal scrolling commands are currently not catered for.
2165 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
2167 ;; Set the isearch-scroll property on some standard functions:
2168 ;; Scroll-bar functions:
2169 (if (fboundp 'scroll-bar-toolkit-scroll)
2170 (put 'scroll-bar-toolkit-scroll 'isearch-scroll t))
2171 (if (fboundp 'w32-handle-scroll-bar-event)
2172 (put 'w32-handle-scroll-bar-event 'isearch-scroll t))
2174 ;; Commands which scroll the window (some scroll commands
2175 ;; already have the `scroll-command' property on them):
2176 (put 'recenter 'isearch-scroll t)
2177 (put 'recenter-top-bottom 'isearch-scroll t)
2178 (put 'reposition-window 'isearch-scroll t)
2180 ;; Commands which act on the other window
2181 (put 'list-buffers 'isearch-scroll t)
2182 (put 'scroll-other-window 'isearch-scroll t)
2183 (put 'scroll-other-window-down 'isearch-scroll t)
2184 (put 'beginning-of-buffer-other-window 'isearch-scroll t)
2185 (put 'end-of-buffer-other-window 'isearch-scroll t)
2187 ;; Commands which change the window layout
2188 (put 'delete-other-windows 'isearch-scroll t)
2189 (put 'balance-windows 'isearch-scroll t)
2190 (put 'split-window-right 'isearch-scroll t)
2191 (put 'split-window-below 'isearch-scroll t)
2192 (put 'enlarge-window 'isearch-scroll t)
2194 ;; Aliases for split-window-*
2195 (put 'split-window-vertically 'isearch-scroll t)
2196 (put 'split-window-horizontally 'isearch-scroll t)
2198 ;; Universal argument commands
2199 (put 'universal-argument 'isearch-scroll t)
2200 (put 'negative-argument 'isearch-scroll t)
2201 (put 'digit-argument 'isearch-scroll t)
2203 (defcustom isearch-allow-scroll nil
2204 "Whether scrolling is allowed during incremental search.
2205 If non-nil, scrolling commands can be used in Isearch mode.
2206 However, the current match will never scroll offscreen.
2207 If nil, scrolling commands will first cancel Isearch mode."
2208 :type 'boolean
2209 :group 'isearch)
2211 (defcustom isearch-allow-prefix t
2212 "Whether prefix arguments are allowed during incremental search.
2213 If non-nil, entering a prefix argument will not terminate the
2214 search. This option is ignored \(presumed t) when
2215 `isearch-allow-scroll' is set."
2216 :version "24.4"
2217 :type 'boolean
2218 :group 'isearch)
2220 (defun isearch-string-out-of-window (isearch-point)
2221 "Test whether the search string is currently outside of the window.
2222 Return nil if it's completely visible, or if point is visible,
2223 together with as much of the search string as will fit; the symbol
2224 `above' if we need to scroll the text downwards; the symbol `below',
2225 if upwards."
2226 (let ((w-start (window-start))
2227 (w-end (window-end nil t))
2228 (w-L1 (save-excursion (move-to-window-line 1) (point)))
2229 (w-L-1 (save-excursion (move-to-window-line -1) (point)))
2230 start end) ; start and end of search string in buffer
2231 (if isearch-forward
2232 (setq end isearch-point start (or isearch-other-end isearch-point))
2233 (setq start isearch-point end (or isearch-other-end isearch-point)))
2234 (cond ((or (and (>= start w-start) (<= end w-end))
2235 (if isearch-forward
2236 (and (>= isearch-point w-L-1) (< isearch-point w-end)) ; point on Line -1
2237 (and (>= isearch-point w-start) (< isearch-point w-L1)))) ; point on Line 0
2238 nil)
2239 ((and (< start w-start)
2240 (< isearch-point w-L-1))
2241 'above)
2242 (t 'below))))
2244 (defun isearch-back-into-window (above isearch-point)
2245 "Scroll the window to bring the search string back into view.
2246 Restore point to ISEARCH-POINT in the process. ABOVE is t when the
2247 search string is above the top of the window, nil when it is beneath
2248 the bottom."
2249 (let (start end)
2250 (if isearch-forward
2251 (setq end isearch-point start (or isearch-other-end isearch-point))
2252 (setq start isearch-point end (or isearch-other-end isearch-point)))
2253 (if above
2254 (progn
2255 (goto-char start)
2256 (recenter 0)
2257 (when (>= isearch-point (window-end nil t))
2258 (goto-char isearch-point)
2259 (recenter -1)))
2260 (goto-char end)
2261 (recenter -1)
2262 (when (< isearch-point (window-start))
2263 (goto-char isearch-point)
2264 (recenter 0))))
2265 (goto-char isearch-point))
2267 (defvar isearch-pre-scroll-point nil)
2269 (defun isearch-pre-command-hook ()
2270 "Decide whether to exit Isearch mode before executing the command.
2271 Don't exit Isearch if the key sequence that invoked this command
2272 is bound in `isearch-mode-map', or if the invoked command is
2273 a prefix argument command (when `isearch-allow-prefix' is non-nil),
2274 or it is a scrolling command (when `isearch-allow-scroll' is non-nil).
2275 Otherwise, exit Isearch (when `search-exit-option' is non-nil)
2276 before the command is executed globally with terminated Isearch."
2277 (let* ((key (this-single-command-keys))
2278 (main-event (aref key 0)))
2279 (cond
2280 ;; Don't exit Isearch if we're in the middle of some
2281 ;; `set-transient-map' thingy like `universal-argument--mode'.
2282 ((not (eq overriding-terminal-local-map isearch--saved-overriding-local-map)))
2283 ;; Don't exit Isearch for isearch key bindings.
2284 ((commandp (lookup-key isearch-mode-map key nil)))
2285 ;; Optionally edit the search string instead of exiting.
2286 ((eq search-exit-option 'edit)
2287 (setq this-command 'isearch-edit-string))
2288 ;; Handle a scrolling function or prefix argument.
2289 ((or (and isearch-allow-prefix
2290 (memq this-command '(universal-argument
2291 digit-argument negative-argument)))
2292 (and isearch-allow-scroll
2293 (symbolp this-command)
2294 (or (eq (get this-command 'isearch-scroll) t)
2295 (eq (get this-command 'scroll-command) t))))
2296 (when isearch-allow-scroll
2297 (setq isearch-pre-scroll-point (point))))
2298 ;; A mouse click on the isearch message starts editing the search string.
2299 ((and (eq (car-safe main-event) 'down-mouse-1)
2300 (window-minibuffer-p (posn-window (event-start main-event))))
2301 ;; Swallow the up-event.
2302 (read-event)
2303 (setq this-command 'isearch-edit-string))
2304 ;; Other characters terminate the search and are then executed normally.
2305 (search-exit-option
2306 (isearch-done)
2307 (isearch-clean-overlays))
2308 ;; If search-exit-option is nil, run the command without exiting Isearch.
2309 (t
2310 (isearch-process-search-string key key)))))
2312 (defun isearch-post-command-hook ()
2313 (when isearch-pre-scroll-point
2314 (let ((ab-bel (isearch-string-out-of-window isearch-pre-scroll-point)))
2315 (if ab-bel
2316 (isearch-back-into-window (eq ab-bel 'above) isearch-pre-scroll-point)
2317 (goto-char isearch-pre-scroll-point)))
2318 (setq isearch-pre-scroll-point nil)
2319 (isearch-update)))
2321 (defun isearch-quote-char (&optional count)
2322 "Quote special characters for incremental search.
2323 With argument, add COUNT copies of the character."
2324 (interactive "p")
2325 (let ((char (read-quoted-char (isearch-message t))))
2326 (unless (characterp char)
2327 (user-error "%s is not a valid character"
2328 (key-description (vector char))))
2329 ;; Assume character codes 0200 - 0377 stand for characters in some
2330 ;; single-byte character set, and convert them to Emacs
2331 ;; characters.
2332 (if (and isearch-regexp isearch-regexp-lax-whitespace (= char ?\s))
2333 (if (subregexp-context-p isearch-string (length isearch-string))
2334 (isearch-process-search-string "[ ]" " ")
2335 (isearch-process-search-char char count))
2336 ;; This used to assume character codes 0240 - 0377 stand for
2337 ;; characters in some single-byte character set, and converted them
2338 ;; to Emacs characters. But in 23.1 this feature is deprecated
2339 ;; in favor of inserting the corresponding Unicode characters.
2340 ;; (and enable-multibyte-characters
2343 ;; (setq char (unibyte-char-to-multibyte char)))
2344 (isearch-process-search-char char count))))
2346 (defun isearch-printing-char (&optional char count)
2347 "Add this ordinary printing CHAR to the search string and search.
2348 With argument, add COUNT copies of the character."
2349 (interactive (list last-command-event
2350 (prefix-numeric-value current-prefix-arg)))
2351 (let ((char (or char last-command-event)))
2352 (if (= char ?\S-\ )
2353 (setq char ?\s))
2354 (if current-input-method
2355 (isearch-process-search-multibyte-characters char count)
2356 (isearch-process-search-char char count))))
2358 (defun isearch-process-search-char (char &optional count)
2359 "Add CHAR to the search string, COUNT times.
2360 Search is updated accordingly."
2361 ;; * and ? are special in regexps when not preceded by \.
2362 ;; } and | are special in regexps when preceded by \.
2363 ;; Nothing special for + because it matches at least once.
2364 (cond
2365 ((memq char '(?* ??)) (isearch-fallback nil))
2366 ((eq char ?\}) (isearch-fallback t t))
2367 ((eq char ?|) (isearch-fallback t nil t)))
2369 ;; Append the char(s) to the search string,
2370 ;; update the message and re-search.
2371 (let* ((string (if (and (integerp count) (> count 1))
2372 (make-string count char)
2373 (char-to-string char)))
2375 string
2376 (mapconcat 'isearch-text-char-description string ""))))
2377 (isearch-process-search-string string message)))
2379 (defun isearch-process-search-string (string message)
2380 (setq isearch-string (concat isearch-string string)
2381 isearch-message (concat isearch-message message))
2382 (isearch-search-and-update))
2384 \f
2385 ;; Search Ring
2387 (defun isearch-ring-adjust1 (advance)
2388 ;; Helper for isearch-ring-adjust
2389 (let* ((ring (if isearch-regexp regexp-search-ring search-ring))
2390 (length (length ring))
2391 (yank-pointer-name (if isearch-regexp
2392 'regexp-search-ring-yank-pointer
2393 'search-ring-yank-pointer))
2394 (yank-pointer (eval yank-pointer-name)))
2395 (if (zerop length)
2396 ()
2397 (set yank-pointer-name
2398 (setq yank-pointer
2399 (mod (+ (or yank-pointer (if advance 0 -1))
2400 (if advance -1 1))
2401 length)))
2402 (setq isearch-string (nth yank-pointer ring)
2403 isearch-message (mapconcat 'isearch-text-char-description
2404 isearch-string "")))))
2406 (defun isearch-ring-adjust (advance)
2407 ;; Helper for isearch-ring-advance and isearch-ring-retreat
2408 (isearch-ring-adjust1 advance)
2409 (if search-ring-update
2410 (progn
2411 (isearch-search)
2412 (isearch-push-state)
2413 (isearch-update))
2414 ;; Otherwise, edit the search string instead. Note that there is
2415 ;; no need to push the search state after isearch-edit-string here
2416 ;; since isearch-edit-string already pushes its state
2417 (isearch-edit-string)))
2419 (defun isearch-ring-advance ()
2420 "Advance to the next search string in the ring."
2421 ;; This could be more general to handle a prefix arg, but who would use it.
2422 (interactive)
2423 (isearch-ring-adjust 'advance))
2425 (defun isearch-ring-retreat ()
2426 "Retreat to the previous search string in the ring."
2427 (interactive)
2428 (isearch-ring-adjust nil))
2430 (defun isearch-complete1 ()
2431 ;; Helper for isearch-complete and isearch-complete-edit
2432 ;; Return t if completion OK, nil if no completion exists.
2433 (let* ((ring (if isearch-regexp regexp-search-ring search-ring))
2434 (completion-ignore-case case-fold-search)
2435 (completion (try-completion isearch-string ring)))
2436 (cond
2437 ((eq completion t)
2438 ;; isearch-string stays the same
2439 t)
2440 ((or completion ; not nil, must be a string
2441 (= 0 (length isearch-string))) ; shouldn't have to say this
2442 (if (equal completion isearch-string) ;; no extension?
2443 (progn
2444 (if completion-auto-help
2445 (with-output-to-temp-buffer "*Isearch completions*"
2446 (display-completion-list
2447 (all-completions isearch-string ring))))
2448 t)
2449 (and completion
2450 (setq isearch-string completion))))
2451 (t
2452 (message "No completion") ; waits a second if in minibuffer
2453 nil))))
2455 (defun isearch-complete ()
2456 "Complete the search string from the strings on the search ring.
2457 The completed string is then editable in the minibuffer.
2458 If there is no completion possible, say so and continue searching."
2459 (interactive)
2460 (if (isearch-complete1)
2461 (progn (setq isearch-message
2462 (mapconcat 'isearch-text-char-description
2463 isearch-string ""))
2464 (isearch-edit-string))
2465 ;; else
2466 (sit-for 1)
2467 (isearch-update)))
2469 (defun isearch-complete-edit ()
2470 "Same as `isearch-complete' except in the minibuffer."
2471 (interactive)
2472 (setq isearch-string (field-string))
2473 (if (isearch-complete1)
2474 (progn
2475 (delete-field)
2476 (insert isearch-string))))
2478 \f
2479 ;; Message string
2481 (defun isearch-message (&optional c-q-hack ellipsis)
2482 ;; Generate and print the message string.
2483 (let ((cursor-in-echo-area ellipsis)
2484 (m isearch-message)
2485 (fail-pos (isearch-fail-pos t)))
2486 ;; Highlight failed part
2487 (when fail-pos
2488 (setq m (copy-sequence m))
2489 (add-text-properties fail-pos (length m) '(face isearch-fail) m)
2490 ;; Highlight failed trailing whitespace
2491 (when (string-match " +$" m)
2492 (add-text-properties (match-beginning 0) (match-end 0)
2493 '(face trailing-whitespace) m)))
2494 (setq m (concat
2495 (isearch-message-prefix ellipsis isearch-nonincremental)
2496 m
2497 (isearch-message-suffix c-q-hack)))
2498 (if c-q-hack m (let ((message-log-max nil)) (message "%s" m)))))
2500 (defun isearch-message-prefix (&optional ellipsis nonincremental)
2501 ;; If about to search, and previous search regexp was invalid,
2502 ;; check that it still is. If it is valid now,
2503 ;; let the message we display while searching say that it is valid.
2504 (and isearch-error ellipsis
2505 (condition-case ()
2506 (progn (re-search-forward isearch-string (point) t)
2507 (setq isearch-error nil))
2508 (error nil)))
2509 ;; If currently failing, display no ellipsis.
2510 (or isearch-success (setq ellipsis nil))
2511 (let ((m (concat (if isearch-success "" "failing ")
2512 (if isearch-adjusted "pending " "")
2513 (if (and isearch-wrapped
2514 (not isearch-wrap-function)
2515 (if isearch-forward
2516 (> (point) isearch-opoint)
2517 (< (point) isearch-opoint)))
2518 "over")
2519 (if isearch-wrapped "wrapped ")
2520 (let ((prefix ""))
2521 (advice-function-mapc
2522 (lambda (_ props)
2523 (let ((np (cdr (assq 'isearch-message-prefix props))))
2524 (if np (setq prefix (concat np prefix)))))
2525 isearch-filter-predicate)
2526 prefix)
2527 (if isearch-word
2528 (or (and (symbolp isearch-word)
2529 (get isearch-word 'isearch-message-prefix))
2530 "word ")
2531 "")
2532 (if isearch-regexp "regexp " "")
2533 (cond
2534 (multi-isearch-file-list "multi-file ")
2535 (multi-isearch-buffer-list "multi-buffer ")
2536 (t ""))
2537 (or isearch-message-prefix-add "")
2538 (if nonincremental "search" "I-search")
2539 (if isearch-forward "" " backward")
2540 (if current-input-method
2541 ;; Input methods for RTL languages use RTL
2542 ;; characters for their title, and that messes
2543 ;; up the display of search text after the prompt.
2544 (bidi-string-mark-left-to-right
2545 (concat " [" current-input-method-title "]: "))
2546 ": ")
2547 )))
2548 (propertize (concat (upcase (substring m 0 1)) (substring m 1))
2549 'face 'minibuffer-prompt)))
2551 (defun isearch-message-suffix (&optional c-q-hack)
2552 (concat (if c-q-hack "^Q" "")
2553 (if isearch-error
2554 (concat " [" isearch-error "]")
2555 "")
2556 (or isearch-message-suffix-add "")))
2558 \f
2559 ;; Searching
2561 (defvar isearch-search-fun-function 'isearch-search-fun-default
2562 "Non-default value overrides the behavior of `isearch-search-fun-default'.
2563 This variable's value should be a function, which will be called
2564 with no arguments, and should return a function that takes three
2565 arguments: STRING, BOUND, and NOERROR.
2567 This returned function will be used by `isearch-search-string' to
2568 search for the first occurrence of STRING or its translation.")
2570 (defun isearch-search-fun ()
2571 "Return the function to use for the search.
2572 Can be changed via `isearch-search-fun-function' for special needs."
2573 (funcall (or isearch-search-fun-function 'isearch-search-fun-default)))
2575 (defun isearch-search-fun-default ()
2576 "Return default functions to use for the search."
2577 (cond
2578 (isearch-word
2579 (lambda (string &optional bound noerror count)
2580 ;; Use lax versions to not fail at the end of the word while
2581 ;; the user adds and removes characters in the search string
2582 ;; (or when using nonincremental word isearch)
2583 (let ((lax (not (or isearch-nonincremental
2584 (null (car isearch-cmds))
2585 (eq (length isearch-string)
2586 (length (isearch--state-string
2587 (car isearch-cmds))))))))
2588 (funcall
2589 (if isearch-forward #'re-search-forward #'re-search-backward)
2590 (if (functionp isearch-word)
2591 (funcall isearch-word string lax)
2592 (word-search-regexp string lax))
2593 bound noerror count))))
2594 ((and isearch-regexp isearch-regexp-lax-whitespace
2595 search-whitespace-regexp)
2596 (if isearch-forward
2597 're-search-forward-lax-whitespace
2598 're-search-backward-lax-whitespace))
2599 (isearch-regexp
2600 (if isearch-forward 're-search-forward 're-search-backward))
2601 ((and isearch-lax-whitespace search-whitespace-regexp)
2602 (if isearch-forward
2603 'search-forward-lax-whitespace
2604 'search-backward-lax-whitespace))
2605 (t
2606 (if isearch-forward 'search-forward 'search-backward))))
2608 (defun isearch-search-string (string bound noerror)
2609 "Search for the first occurrence of STRING or its translation.
2610 If found, move point to the end of the occurrence,
2611 update the match data, and return point."
2612 (let* ((func (isearch-search-fun))
2613 (pos1 (save-excursion (funcall func string bound noerror)))
2614 pos2)
2615 (when (and
2616 ;; Avoid "obsolete" warnings for translation-table-for-input.
2617 (with-no-warnings
2618 (char-table-p translation-table-for-input))
2619 (multibyte-string-p string)
2620 ;; Minor optimization.
2621 (string-match-p "[^[:ascii:]]" string))
2622 (let ((translated
2623 (apply 'string
2624 (mapcar (lambda (c)
2625 (or
2626 ;; Avoid "obsolete" warnings for
2627 ;; translation-table-for-input.
2628 (with-no-warnings
2629 (aref translation-table-for-input c))
2630 c))
2631 string)))
2632 match-data)
2633 (when translated
2634 (save-match-data
2635 (save-excursion
2636 (if (setq pos2 (funcall func translated bound noerror))
2637 (setq match-data (match-data t)))))
2638 (when (and pos2
2639 (or (not pos1)
2640 (if isearch-forward (< pos2 pos1) (> pos2 pos1))))
2641 (setq pos1 pos2)
2642 (set-match-data match-data)))))
2643 (when pos1
2644 ;; When using multiple buffers isearch, switch to the new buffer here,
2645 ;; because `save-excursion' above doesn't allow doing it inside funcall.
2646 (if (and multi-isearch-next-buffer-current-function
2647 (buffer-live-p multi-isearch-current-buffer))
2648 (switch-to-buffer multi-isearch-current-buffer))
2649 (goto-char pos1)
2650 pos1)))
2652 (defun isearch-search ()
2653 ;; Do the search with the current search string.
2654 (if isearch-message-function
2655 (funcall isearch-message-function nil t)
2656 (isearch-message nil t))
2657 (if (and (eq isearch-case-fold-search t) search-upper-case)
2658 (setq isearch-case-fold-search
2659 (isearch-no-upper-case-p isearch-string isearch-regexp)))
2660 (condition-case lossage
2661 (let ((inhibit-point-motion-hooks isearch-invisible)
2662 (inhibit-quit nil)
2663 (case-fold-search isearch-case-fold-search)
2664 (search-invisible isearch-invisible)
2665 (retry t))
2666 (setq isearch-error nil)
2667 (while retry
2668 (setq isearch-success
2669 (isearch-search-string isearch-string nil t))
2670 ;; Clear RETRY unless the search predicate says
2671 ;; to skip this search hit.
2672 (if (or (not isearch-success)
2673 (bobp) (eobp)
2674 (= (match-beginning 0) (match-end 0))
2675 (funcall isearch-filter-predicate
2676 (match-beginning 0) (match-end 0)))
2677 (setq retry nil)))
2678 (setq isearch-just-started nil)
2679 (if isearch-success
2680 (setq isearch-other-end
2681 (if isearch-forward (match-beginning 0) (match-end 0)))))
2683 (quit (isearch-unread ?\C-g)
2684 (setq isearch-success nil))
2686 (invalid-regexp
2687 (setq isearch-error (car (cdr lossage)))
2688 (cond
2689 ((string-match
2691 isearch-error)
2692 (setq isearch-error "incomplete input"))
2693 ((and (not isearch-regexp)
2695 (cond
2696 (isearch-word
2697 (setq isearch-error "Too many words"))
2698 ((and isearch-lax-whitespace search-whitespace-regexp)
2699 (setq isearch-error "Too many spaces for whitespace matching"))))))
2701 (search-failed
2702 (setq isearch-success nil)
2703 (setq isearch-error (nth 2 lossage)))
2705 (error
2706 ;; stack overflow in regexp search.
2707 (setq isearch-error (format "%s" lossage))))
2709 (if isearch-success
2710 nil
2711 ;; Ding if failed this time after succeeding last time.
2712 (and (isearch--state-success (car isearch-cmds))
2713 (ding))
2714 (if (functionp (isearch--state-pop-fun (car isearch-cmds)))
2715 (funcall (isearch--state-pop-fun (car isearch-cmds))
2716 (car isearch-cmds)))
2717 (goto-char (isearch--state-point (car isearch-cmds)))))
2720 ;; Called when opening an overlay, and we are still in isearch.
2721 (defun isearch-open-overlay-temporary (ov)
2722 (if (not (null (overlay-get ov 'isearch-open-invisible-temporary)))
2723 ;; Some modes would want to open the overlays temporary during
2724 ;; isearch in their own way, they should set the
2725 ;; `isearch-open-invisible-temporary' to a function doing this.
2726 (funcall (overlay-get ov 'isearch-open-invisible-temporary) ov nil)
2727 ;; Store the values for the `invisible' property, and then set it to nil.
2728 ;; This way the text hidden by this overlay becomes visible.
2730 ;; In 19.34 this does not exist so I cannot test it.
2731 (overlay-put ov 'isearch-invisible (overlay-get ov 'invisible))
2732 (overlay-put ov 'invisible nil)))
2735 ;; This is called at the end of isearch. It will open the overlays
2736 ;; that contain the latest match. Obviously in case of a C-g the
2737 ;; point returns to the original location which surely is not contain
2738 ;; in any of these overlays, se we are safe in this case too.
2739 (defun isearch-open-necessary-overlays (ov)
2740 (let ((inside-overlay (and (> (point) (overlay-start ov))
2741 (<= (point) (overlay-end ov))))
2742 ;; If this exists it means that the overlay was opened using
2743 ;; this function, not by us tweaking the overlay properties.
2744 (fct-temp (overlay-get ov 'isearch-open-invisible-temporary)))
2745 (when (or inside-overlay (not fct-temp))
2746 ;; restore the values for the `invisible' properties.
2747 (overlay-put ov 'invisible (overlay-get ov 'isearch-invisible))
2748 (overlay-put ov 'isearch-invisible nil))
2749 (if inside-overlay
2750 (funcall (overlay-get ov 'isearch-open-invisible) ov)
2751 (if fct-temp
2752 (funcall fct-temp ov t)))))
2754 ;; This is called when exiting isearch. It closes the temporary
2755 ;; opened overlays, except the ones that contain the latest match.
2756 (defun isearch-clean-overlays ()
2757 (when isearch-opened-overlays
2758 (mapc 'isearch-open-necessary-overlays isearch-opened-overlays)
2759 (setq isearch-opened-overlays nil)))
2762 (defun isearch-intersects-p (start0 end0 start1 end1)
2763 "Return t if regions START0..END0 and START1..END1 intersect."
2764 (or (and (>= start0 start1) (< start0 end1))
2765 (and (> end0 start1) (<= end0 end1))
2766 (and (>= start1 start0) (< start1 end0))
2767 (and (> end1 start0) (<= end1 end0))))
2770 ;; Verify if the current match is outside of each element of
2771 ;; `isearch-opened-overlays', if so close that overlay.
2773 (defun isearch-close-unnecessary-overlays (begin end)
2774 (let ((overlays isearch-opened-overlays))
2775 (setq isearch-opened-overlays nil)
2776 (dolist (ov overlays)
2777 (if (isearch-intersects-p begin end (overlay-start ov) (overlay-end ov))
2778 (push ov isearch-opened-overlays)
2779 (let ((fct-temp (overlay-get ov 'isearch-open-invisible-temporary)))
2780 (if fct-temp
2781 ;; If this exists it means that the overlay was opened
2782 ;; using this function, not by us tweaking the overlay
2783 ;; properties.
2784 (funcall fct-temp ov t)
2785 (overlay-put ov 'invisible (overlay-get ov 'isearch-invisible))
2786 (overlay-put ov 'isearch-invisible nil)))))))
2789 (defun isearch-range-invisible (beg end)
2790 "Return t if all the text from BEG to END is invisible."
2791 (when (/= beg end)
2792 ;; Check that invisibility runs up to END.
2793 (save-excursion
2794 (goto-char beg)
2795 (let (;; can-be-opened keeps track if we can open some overlays.
2796 (can-be-opened (eq search-invisible 'open))
2797 ;; the list of overlays that could be opened
2798 (crt-overlays nil))
2799 (when (and can-be-opened isearch-hide-immediately)
2800 (isearch-close-unnecessary-overlays beg end))
2801 ;; If the following character is currently invisible,
2802 ;; skip all characters with that same `invisible' property value.
2803 ;; Do that over and over.
2804 (while (and (< (point) end) (invisible-p (point)))
2805 (if (invisible-p (get-text-property (point) 'invisible))
2806 (progn
2807 (goto-char (next-single-property-change (point) 'invisible
2808 nil end))
2809 ;; if text is hidden by an `invisible' text property
2810 ;; we cannot open it at all.
2811 (setq can-be-opened nil))
2812 (when can-be-opened
2813 (let ((overlays (overlays-at (point)))
2814 ov-list
2815 o
2816 invis-prop)
2817 (while overlays
2818 (setq o (car overlays)
2819 invis-prop (overlay-get o 'invisible))
2820 (if (invisible-p invis-prop)
2821 (if (overlay-get o 'isearch-open-invisible)
2822 (setq ov-list (cons o ov-list))
2823 ;; We found one overlay that cannot be
2824 ;; opened, that means the whole chunk
2825 ;; cannot be opened.
2826 (setq can-be-opened nil)))
2827 (setq overlays (cdr overlays)))
2828 (if can-be-opened
2829 ;; It makes sense to append to the open
2830 ;; overlays list only if we know that this is
2831 ;; t.
2832 (setq crt-overlays (append ov-list crt-overlays)))))
2833 (goto-char (next-overlay-change (point)))))
2834 ;; See if invisibility reaches up thru END.
2835 (if (>= (point) end)
2836 (if (and can-be-opened (consp crt-overlays))
2837 (progn
2838 (setq isearch-opened-overlays
2839 (append isearch-opened-overlays crt-overlays))
2840 (mapc 'isearch-open-overlay-temporary crt-overlays)
2841 nil)
2842 (setq isearch-hidden t)))))))
2844 (defun isearch-filter-visible (beg end)
2845 "Test whether the current search hit is visible at least partially.
2846 Return non-nil if the text from BEG to END is visible to Isearch as
2847 determined by `isearch-range-invisible' unless invisible text can be
2848 searched too when `search-invisible' is t."
2849 (or (eq search-invisible t)
2850 (not (isearch-range-invisible beg end))))
2852 \f
2853 ;; General utilities
2855 (defun isearch-no-upper-case-p (string regexp-flag)
2856 "Return t if there are no upper case chars in STRING.
2858 since they have special meaning in a regexp."
2859 (let (quote-flag (i 0) (len (length string)) found)
2860 (while (and (not found) (< i len))
2861 (let ((char (aref string i)))
2863 (setq quote-flag (not quote-flag))
2864 (if (and (not quote-flag) (not (eq char (downcase char))))
2865 (setq found t))
2866 (setq quote-flag nil)))
2867 (setq i (1+ i)))
2868 (not (or found
2869 ;; Even if there's no uppercase char, we want to detect the use
2870 ;; of [:upper:] or [:lower:] char-class, which indicates
2871 ;; clearly that the user cares about case distinction.
2873 (condition-case err
2874 (progn
2875 (string-match (substring string 0 (match-beginning 0))
2876 "")
2877 nil)
2878 (invalid-regexp
2879 (equal "Unmatched [ or [^" (cadr err)))))))))
2881 ;; Portability functions to support various Emacs versions.
2883 (defun isearch-text-char-description (c)
2884 (cond
2885 ((< c ?\s) (propertize
2886 (char-to-string c)
2887 'display (propertize (format "^%c" (+ c 64)) 'face 'escape-glyph)))
2888 ((= c ?\^?) (propertize
2889 (char-to-string c)
2890 'display (propertize "^?" 'face 'escape-glyph)))
2891 (t (char-to-string c))))
2893 ;; General function to unread characters or events.
2894 ;; Also insert them in a keyboard macro being defined.
2895 (defun isearch-unread (&rest char-or-events)
2896 (mapc 'store-kbd-macro-event char-or-events)
2897 (setq unread-command-events
2898 (append char-or-events unread-command-events)))
2900 \f
2901 ;; Highlighting
2903 (defvar isearch-overlay nil)
2905 (defun isearch-highlight (beg end)
2906 (if search-highlight
2907 (if isearch-overlay
2908 ;; Overlay already exists, just move it.
2909 (move-overlay isearch-overlay beg end (current-buffer))
2910 ;; Overlay doesn't exist, create it.
2911 (setq isearch-overlay (make-overlay beg end))
2912 ;; 1001 is higher than lazy's 1000 and ediff's 100+
2913 (overlay-put isearch-overlay 'priority 1001)
2914 (overlay-put isearch-overlay 'face isearch-face))))
2916 (defun isearch-dehighlight ()
2917 (when isearch-overlay
2918 (delete-overlay isearch-overlay)))
2919 \f
2920 ;; isearch-lazy-highlight feature
2921 ;; by Bob Glickstein <http://www.zanshin.com/~bobg/>
2923 ;; When active, *every* match for the current search string is
2924 ;; highlighted: the current one using the normal isearch match color
2925 ;; and all the others using `isearch-lazy-highlight'. The extra
2926 ;; highlighting makes it easier to anticipate where the cursor will
2927 ;; land each time you press C-s or C-r to repeat a pending search.
2928 ;; Highlighting of these additional matches happens in a deferred
2929 ;; fashion using "idle timers," so the cycles needed do not rob
2930 ;; isearch of its usual snappy response.
2932 ;; IMPLEMENTATION NOTE: This depends on some isearch internals.
2933 ;; Specifically:
2934 ;; - `isearch-update' is expected to be called (at least) every time
2935 ;; the search string or window-start changes;
2936 ;; - `isearch-string' is expected to contain the current search
2937 ;; string as entered by the user;
2938 ;; - the type of the current search is expected to be given by
2939 ;; `isearch-word' and `isearch-regexp';
2940 ;; - the direction of the current search is expected to be given by
2941 ;; `isearch-forward';
2942 ;; - the variable `isearch-error' is expected to be true
2943 ;; only if `isearch-string' is an invalid regexp.
2945 (defvar isearch-lazy-highlight-overlays nil)
2946 (defvar isearch-lazy-highlight-wrapped nil)
2947 (defvar isearch-lazy-highlight-start-limit nil)
2948 (defvar isearch-lazy-highlight-end-limit nil)
2949 (defvar isearch-lazy-highlight-start nil)
2950 (defvar isearch-lazy-highlight-end nil)
2951 (defvar isearch-lazy-highlight-timer nil)
2952 (defvar isearch-lazy-highlight-last-string nil)
2953 (defvar isearch-lazy-highlight-window nil)
2954 (defvar isearch-lazy-highlight-window-start nil)
2955 (defvar isearch-lazy-highlight-window-end nil)
2956 (defvar isearch-lazy-highlight-case-fold-search nil)
2957 (defvar isearch-lazy-highlight-regexp nil)
2958 (defvar isearch-lazy-highlight-lax-whitespace nil)
2959 (defvar isearch-lazy-highlight-regexp-lax-whitespace nil)
2960 (defvar isearch-lazy-highlight-word nil)
2961 (defvar isearch-lazy-highlight-forward nil)
2962 (defvar isearch-lazy-highlight-error nil)
2964 (defun lazy-highlight-cleanup (&optional force)
2965 "Stop lazy highlighting and remove extra highlighting from current buffer.
2966 FORCE non-nil means do it whether or not `lazy-highlight-cleanup'
2967 is nil. This function is called when exiting an incremental search if
2968 `lazy-highlight-cleanup' is non-nil."
2969 (interactive '(t))
2970 (if (or force lazy-highlight-cleanup)
2971 (while isearch-lazy-highlight-overlays
2972 (delete-overlay (car isearch-lazy-highlight-overlays))
2973 (setq isearch-lazy-highlight-overlays
2974 (cdr isearch-lazy-highlight-overlays))))
2975 (when isearch-lazy-highlight-timer
2976 (cancel-timer isearch-lazy-highlight-timer)
2977 (setq isearch-lazy-highlight-timer nil)))
2979 (define-obsolete-function-alias 'isearch-lazy-highlight-cleanup
2980 'lazy-highlight-cleanup
2981 "22.1")
2983 (defun isearch-lazy-highlight-new-loop (&optional beg end)
2984 "Cleanup any previous `lazy-highlight' loop and begin a new one.
2985 BEG and END specify the bounds within which highlighting should occur.
2986 This is called when `isearch-update' is invoked (which can cause the
2987 search string to change or the window to scroll). It is also used
2988 by other Emacs features."
2989 (when (and (null executing-kbd-macro)
2990 (sit-for 0) ;make sure (window-start) is credible
2991 (or (not (equal isearch-string
2992 isearch-lazy-highlight-last-string))
2993 (not (eq (selected-window)
2994 isearch-lazy-highlight-window))
2995 (not (eq isearch-lazy-highlight-case-fold-search
2996 isearch-case-fold-search))
2997 (not (eq isearch-lazy-highlight-regexp
2998 isearch-regexp))
2999 (not (eq isearch-lazy-highlight-word
3000 isearch-word))
3001 (not (eq isearch-lazy-highlight-lax-whitespace
3002 isearch-lax-whitespace))
3003 (not (eq isearch-lazy-highlight-regexp-lax-whitespace
3004 isearch-regexp-lax-whitespace))
3005 (not (= (window-start)
3006 isearch-lazy-highlight-window-start))
3007 (not (= (window-end) ; Window may have been split/joined.
3008 isearch-lazy-highlight-window-end))
3009 (not (eq isearch-forward
3010 isearch-lazy-highlight-forward))
3011 ;; In case we are recovering from an error.
3012 (not (equal isearch-error
3013 isearch-lazy-highlight-error))))
3014 ;; something important did indeed change
3015 (lazy-highlight-cleanup t) ;kill old loop & remove overlays
3016 (setq isearch-lazy-highlight-error isearch-error)
3017 ;; It used to check for `(not isearch-error)' here, but actually
3018 ;; lazy-highlighting might find matches to highlight even when
3019 ;; `isearch-error' is non-nil. (Bug#9918)
3020 (setq isearch-lazy-highlight-start-limit beg
3021 isearch-lazy-highlight-end-limit end)
3022 (setq isearch-lazy-highlight-window (selected-window)
3023 isearch-lazy-highlight-window-start (window-start)
3024 isearch-lazy-highlight-window-end (window-end)
3025 ;; Start lazy-highlighting at the beginning of the found
3026 ;; match (`isearch-other-end'). If no match, use point.
3027 ;; One of the next two variables (depending on search direction)
3028 ;; is used to define the starting position of lazy-highlighting
3029 ;; and also to remember the current position of point between
3030 ;; calls of `isearch-lazy-highlight-update', and another variable
3031 ;; is used to define where the wrapped search must stop.
3032 isearch-lazy-highlight-start (or isearch-other-end (point))
3033 isearch-lazy-highlight-end (or isearch-other-end (point))
3034 isearch-lazy-highlight-wrapped nil
3035 isearch-lazy-highlight-last-string isearch-string
3036 isearch-lazy-highlight-case-fold-search isearch-case-fold-search
3037 isearch-lazy-highlight-regexp isearch-regexp
3038 isearch-lazy-highlight-lax-whitespace isearch-lax-whitespace
3039 isearch-lazy-highlight-regexp-lax-whitespace isearch-regexp-lax-whitespace
3040 isearch-lazy-highlight-word isearch-word
3041 isearch-lazy-highlight-forward isearch-forward)
3042 (unless (equal isearch-string "")
3043 (setq isearch-lazy-highlight-timer
3044 (run-with-idle-timer lazy-highlight-initial-delay nil
3045 'isearch-lazy-highlight-update)))))
3047 (defun isearch-lazy-highlight-search ()
3048 "Search ahead for the next or previous match, for lazy highlighting.
3049 Attempt to do the search exactly the way the pending Isearch would."
3050 (condition-case nil
3051 (let ((case-fold-search isearch-lazy-highlight-case-fold-search)
3052 (isearch-regexp isearch-lazy-highlight-regexp)
3053 (isearch-word isearch-lazy-highlight-word)
3054 (isearch-lax-whitespace
3055 isearch-lazy-highlight-lax-whitespace)
3056 (isearch-regexp-lax-whitespace
3057 isearch-lazy-highlight-regexp-lax-whitespace)
3058 (isearch-forward isearch-lazy-highlight-forward)
3059 (search-invisible nil) ; don't match invisible text
3060 (retry t)
3061 (success nil)
3062 (bound (if isearch-lazy-highlight-forward
3063 (min (or isearch-lazy-highlight-end-limit (point-max))
3064 (if isearch-lazy-highlight-wrapped
3065 (+ isearch-lazy-highlight-start
3066 ;; Extend bound to match whole string at point
3067 (1- (length isearch-lazy-highlight-last-string)))
3068 (window-end)))
3069 (max (or isearch-lazy-highlight-start-limit (point-min))
3070 (if isearch-lazy-highlight-wrapped
3071 (- isearch-lazy-highlight-end
3072 ;; Extend bound to match whole string at point
3073 (1- (length isearch-lazy-highlight-last-string)))
3074 (window-start))))))
3075 ;; Use a loop like in `isearch-search'.
3076 (while retry
3077 (setq success (isearch-search-string
3078 isearch-lazy-highlight-last-string bound t))
3079 ;; Clear RETRY unless the search predicate says
3080 ;; to skip this search hit.
3081 (if (or (not success)
3082 (= (point) bound) ; like (bobp) (eobp) in `isearch-search'.
3083 (= (match-beginning 0) (match-end 0))
3084 (funcall isearch-filter-predicate
3085 (match-beginning 0) (match-end 0)))
3086 (setq retry nil)))
3087 success)
3088 (error nil)))
3090 (defun isearch-lazy-highlight-update ()
3091 "Update highlighting of other matches for current search."
3092 (let ((max lazy-highlight-max-at-a-time)
3093 (looping t)
3094 nomore)
3095 (with-local-quit
3096 (save-selected-window
3097 (if (and (window-live-p isearch-lazy-highlight-window)
3098 (not (eq (selected-window) isearch-lazy-highlight-window)))
3099 (select-window isearch-lazy-highlight-window))
3100 (save-excursion
3101 (save-match-data
3102 (goto-char (if isearch-lazy-highlight-forward
3103 isearch-lazy-highlight-end
3104 isearch-lazy-highlight-start))
3105 (while looping
3106 (let ((found (isearch-lazy-highlight-search)))
3107 (when max
3108 (setq max (1- max))
3109 (if (<= max 0)
3110 (setq looping nil)))
3111 (if found
3112 (let ((mb (match-beginning 0))
3113 (me (match-end 0)))
3114 (if (= mb me) ;zero-length match
3115 (if isearch-lazy-highlight-forward
3116 (if (= mb (if isearch-lazy-highlight-wrapped
3117 isearch-lazy-highlight-start
3118 (window-end)))
3119 (setq found nil)
3120 (forward-char 1))
3121 (if (= mb (if isearch-lazy-highlight-wrapped
3122 isearch-lazy-highlight-end
3123 (window-start)))
3124 (setq found nil)
3125 (forward-char -1)))
3127 ;; non-zero-length match
3128 (let ((ov (make-overlay mb me)))
3129 (push ov isearch-lazy-highlight-overlays)
3130 ;; 1000 is higher than ediff's 100+,
3131 ;; but lower than isearch main overlay's 1001
3132 (overlay-put ov 'priority 1000)
3133 (overlay-put ov 'face lazy-highlight-face)
3134 (overlay-put ov 'window (selected-window))))
3135 ;; Remember the current position of point for
3136 ;; the next call of `isearch-lazy-highlight-update'
3137 ;; when `lazy-highlight-max-at-a-time' is too small.
3138 (if isearch-lazy-highlight-forward
3139 (setq isearch-lazy-highlight-end (point))
3140 (setq isearch-lazy-highlight-start (point)))))
3142 ;; not found or zero-length match at the search bound
3143 (if (not found)
3144 (if isearch-lazy-highlight-wrapped
3145 (setq looping nil
3146 nomore t)
3147 (setq isearch-lazy-highlight-wrapped t)
3148 (if isearch-lazy-highlight-forward
3149 (progn
3150 (setq isearch-lazy-highlight-end (window-start))
3151 (goto-char (max (or isearch-lazy-highlight-start-limit (point-min))
3152 (window-start))))
3153 (setq isearch-lazy-highlight-start (window-end))
3154 (goto-char (min (or isearch-lazy-highlight-end-limit (point-max))
3155 (window-end))))))))
3156 (unless nomore
3157 (setq isearch-lazy-highlight-timer
3158 (run-at-time lazy-highlight-interval nil
3159 'isearch-lazy-highlight-update)))))))))
3161 (defun isearch-resume (string regexp word forward message case-fold)
3162 "Resume an incremental search.
3163 STRING is the string or regexp searched for.
3164 REGEXP non-nil means the resumed search was a regexp search.
3165 WORD non-nil means resume a word search.
3166 FORWARD non-nil means resume a forward search.
3167 MESSAGE is the echo-area message recorded for the search resumed.
3168 CASE-FOLD non-nil means the search was case-insensitive."
3169 (isearch-mode forward regexp nil nil word)
3170 (setq isearch-string string
3171 isearch-message message
3172 isearch-case-fold-search case-fold)
3173 (isearch-search)
3174 (isearch-update))
3176 ;;; isearch.el ends here