| blob | 02b121621a604cfcf6f86f89d3e451916674e593 |
1 ;;; isearch.el --- incremental search minor mode
3 ;; Copyright (C) 1992-1997, 1999-2013 Free Software Foundation, Inc.
5 ;; Author: Daniel LaLiberte <liberte@cs.uiuc.edu>
6 ;; Maintainer: FSF
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 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'.)
140 See also `reveal-mode' if you want overlays to automatically be opened
141 whenever point is in one of them."
148 "If non-nil, re-hide an invisible match right away.
149 This variable makes a difference when `search-invisible' is set to `open'.
150 It means that after search makes some invisible text visible
151 to show the match, it makes the text invisible again when the match moves.
152 Ordinarily the text becomes invisible again at the end of the search."
157 "If non-nil, `isearch-resume' commands are added to the command history.
158 This allows you to resume earlier Isearch sessions through the
159 command history."
170 "Function(s) to call after terminating an incremental search.
171 When these functions are called, `isearch-mode-end-hook-quit'
178 "Function to call to display the search prompt.
182 "Function to call to wrap the search when search is failed.
183 If nil, move point to the beginning of the buffer for a forward search,
187 "Function to save a function restoring the mode-specific Isearch state
191 "Predicate that filter the search hits that would normally be available.
192 Search hits that dissatisfy the predicate are skipped. The function
193 has two arguments: the positions of start and end of text matched by
194 the search. If this function returns nil, continue searching without
195 stopping at this match.
196 If you use `add-function' to modify this variable, you can use the
197 `isearch-message-prefix' advice property to specify the prefix string
200 ;; Search ring.
208 "Maximum length of search ring before oldest elements are thrown away."
212 "Maximum length of regexp search ring before oldest elements are thrown away."
217 "Index in `search-ring' of last string reused.
220 "Index in `regexp-search-ring' of last string reused.
224 "Non-nil if advancing or retreating in the search ring should cause search.
225 Default value, nil, means edit the string instead."
229 ;;; isearch highlight customization.
232 "Non-nil means incremental search highlights the current match."
238 ;; The background must not be too dark, for that means
239 ;; the character is hard to see when the cursor is there.
248 "Face for highlighting Isearch matches."
265 "Face for highlighting failed part in Isearch echo-area message."
270 "Controls the lazy-highlighting during incremental search.
271 When non-nil, all text in the buffer matching the current search
272 string is highlighted lazily (see `lazy-highlight-initial-delay'
273 and `lazy-highlight-interval')."
278 ;;; Lazy highlight customization.
281 "Lazy highlighting feature for matching strings."
288 'lazy-highlight-cleanup
292 "Controls whether to remove extra highlighting after a search.
299 'lazy-highlight-initial-delay
303 "Seconds to wait before beginning to lazily highlight all matches."
308 'lazy-highlight-interval
312 "Seconds between lazily highlighting successive matches."
317 'lazy-highlight-max-at-a-time
321 "Maximum matches to highlight at a time (for `lazy-highlight').
322 Larger values may reduce Isearch's responsiveness to user input;
323 smaller values make matches highlight slowly.
324 A value of nil means highlight all matches."
339 "Face for lazy highlighting of matches other than the current one."
344 'lazy-highlight-face
347 \f
348 ;; Define isearch help map.
354 (define-key map [f1] 'isearch-help-for-help)
355 (define-key map "?" 'isearch-help-for-help)
356 (define-key map "b" 'isearch-describe-bindings)
357 (define-key map "k" 'isearch-describe-key)
358 (define-key map "m" 'isearch-describe-mode)
359 (define-key map "q" 'help-quit)
360 map)
361 "Keymap for characters following the Help key for Isearch mode.")
363 (eval-when-compile (require 'help-macro))
365 (make-help-screen isearch-help-for-help-internal
366 (purecopy "Type a help option: [bkm] or ?")
367 "You have typed %THIS-KEY%, the help character. Type a Help option:
370 b Display all Isearch key bindings.
371 k KEYS Display full documentation of Isearch key sequence.
372 m Display documentation of Isearch mode.
374 You can't type here other help keys available in the global help map,
375 but outside of this help window when you type them in Isearch mode,
376 they exit Isearch mode before displaying global help."
377 isearch-help-map)
379 (defvar isearch--display-help-action '(nil (inhibit-same-window . t)))
381 (defun isearch-help-for-help ()
382 "Display Isearch help menu."
383 (interactive)
384 (let ((display-buffer-overriding-action isearch--display-help-action))
385 (isearch-help-for-help-internal))
386 (isearch-update))
388 (defun isearch-describe-bindings ()
389 "Show a list of all keys defined in Isearch mode, and their definitions.
390 This is like `describe-bindings', but displays only Isearch keys."
391 (interactive)
392 (let ((display-buffer-overriding-action isearch--display-help-action))
393 (with-help-window "*Help*"
394 (with-current-buffer standard-output
398 (defun isearch-describe-key ()
399 "Display documentation of the function invoked by isearch key."
400 (interactive)
401 (let ((display-buffer-overriding-action isearch--display-help-action))
402 (call-interactively 'describe-key))
403 (isearch-update))
405 (defun isearch-describe-mode ()
406 "Display documentation of Isearch mode."
407 (interactive)
408 (let ((display-buffer-overriding-action isearch--display-help-action))
409 (describe-function 'isearch-forward))
410 (isearch-update))
412 (defalias 'isearch-mode-help 'isearch-describe-mode)
414 \f
415 ;; Define isearch-mode keymap.
417 (defvar isearch-mode-map
418 (let ((i 0)
419 (map (make-keymap)))
420 (or (char-table-p (nth 1 map))
421 (error "The initialization of isearch-mode-map must be updated"))
422 ;; Make all multibyte characters search for themselves.
423 (set-char-table-range (nth 1 map) (cons #x100 (max-char))
424 'isearch-printing-char)
426 ;; Single-byte printing chars extend the search string by default.
427 (setq i ?\s)
428 (while (< i 256)
429 (define-key map (vector i) 'isearch-printing-char)
430 (setq i (1+ i)))
432 ;; To handle local bindings with meta char prefix keys, define
433 ;; another full keymap. This must be done for any other prefix
434 ;; keys as well, one full keymap per char of the prefix key. It
435 ;; would be simpler to disable the global keymap, and/or have a
436 ;; default local key binding for any key not otherwise bound.
437 (let ((meta-map (make-sparse-keymap)))
438 (define-key map (char-to-string meta-prefix-char) meta-map))
440 ;; Several non-printing chars change the searching behavior.
441 (define-key map "\C-s" 'isearch-repeat-forward)
442 (define-key map "\C-r" 'isearch-repeat-backward)
443 ;; Define M-C-s and M-C-r like C-s and C-r so that the same key
444 ;; combinations can be used to repeat regexp isearches that can
445 ;; be used to start these searches.
446 (define-key map "\M-\C-s" 'isearch-repeat-forward)
447 (define-key map "\M-\C-r" 'isearch-repeat-backward)
449 (define-key map "\C-g" 'isearch-abort)
451 ;; This assumes \e is the meta-prefix-char.
452 (or (= ?\e meta-prefix-char)
453 (error "Inconsistency in isearch.el"))
454 (define-key map "\e\e\e" 'isearch-cancel)
456 (define-key map "\C-q" 'isearch-quote-char)
459 (define-key map "\C-j" 'isearch-printing-char)
461 (define-key map [?\S-\ ] 'isearch-printing-char)
463 (define-key map "\C-w" 'isearch-yank-word-or-char)
464 (define-key map "\M-\C-w" 'isearch-del-char)
465 (define-key map "\M-\C-y" 'isearch-yank-char)
466 (define-key map "\C-y" 'isearch-yank-kill)
467 (define-key map "\M-s\C-e" 'isearch-yank-line)
469 (define-key map (char-to-string help-char) isearch-help-map)
473 (define-key map "\M-n" 'isearch-ring-advance)
474 (define-key map "\M-p" 'isearch-ring-retreat)
475 (define-key map "\M-y" 'isearch-yank-pop)
479 ;; Pass frame events transparently so they won't exit the search.
480 ;; In particular, if we have more than one display open, then a
481 ;; switch-frame might be generated by someone typing at another keyboard.
482 (define-key map [switch-frame] nil)
483 (define-key map [delete-frame] nil)
484 (define-key map [iconify-frame] nil)
485 (define-key map [make-frame-visible] nil)
486 (define-key map [mouse-movement] nil)
487 (define-key map [language-change] nil)
489 ;; For searching multilingual text.
491 (define-key map "\C-^" 'isearch-toggle-specified-input-method)
493 ;; People expect to be able to paste with the mouse.
494 (define-key map [mouse-2] #'isearch-mouse-2)
495 (define-key map [down-mouse-2] nil)
497 ;; Some bindings you may want to put in your isearch-mode-hook.
498 ;; Suggest some alternates...
499 (define-key map "\M-c" 'isearch-toggle-case-fold)
500 (define-key map "\M-r" 'isearch-toggle-regexp)
501 (define-key map "\M-e" 'isearch-edit-string)
503 (define-key map "\M-sc" 'isearch-toggle-case-fold)
504 (define-key map "\M-si" 'isearch-toggle-invisible)
505 (define-key map "\M-sr" 'isearch-toggle-regexp)
506 (define-key map "\M-sw" 'isearch-toggle-word)
507 (define-key map "\M-s_" 'isearch-toggle-symbol)
508 (define-key map "\M-s " 'isearch-toggle-lax-whitespace)
510 (define-key map [?\M-%] 'isearch-query-replace)
511 (define-key map [?\C-\M-%] 'isearch-query-replace-regexp)
512 (define-key map "\M-so" 'isearch-occur)
513 (define-key map "\M-shr" 'isearch-highlight-regexp)
515 ;; The key translations defined in the C-x 8 prefix should add
516 ;; characters to the search string. See iso-transl.el.
519 map)
520 "Keymap for `isearch-mode'.")
522 (defvar minibuffer-local-isearch-map
523 (let ((map (make-sparse-keymap)))
524 (set-keymap-parent map minibuffer-local-map)
527 (define-key map "\C-s" 'isearch-forward-exit-minibuffer)
528 (define-key map "\C-r" 'isearch-reverse-exit-minibuffer)
529 (define-key map "\C-f" 'isearch-yank-char-in-minibuffer)
530 (define-key map [right] 'isearch-yank-char-in-minibuffer)
531 map)
532 "Keymap for editing Isearch strings in the minibuffer.")
534 ;; Internal variables declared globally for byte-compiler.
535 ;; These are all set with setq while isearching
536 ;; and bound locally while editing the search string.
538 (defvar isearch-forward nil) ; Searching in the forward direction.
539 (defvar isearch-regexp nil) ; Searching for a regexp.
540 (defvar isearch-word nil
541 "Regexp-based search mode for words/symbols.
542 If t, do incremental search for a sequence of words, ignoring punctuation.
543 If the value is a function (e.g. `isearch-symbol-regexp'), it is called to
544 convert the search string to a regexp used by regexp search functions.
545 The property `isearch-message-prefix' put on this function specifies the
546 prefix string displayed in the search message.")
548 (defvar isearch-lax-whitespace t
549 "If non-nil, a space will match a sequence of whitespace chars.
550 When you enter a space or spaces in ordinary incremental search, it
551 will match any sequence matched by the regexp defined by the variable
552 `search-whitespace-regexp'. If the value is nil, each space you type
553 matches literally, against one space. You can toggle the value of this
554 variable by the command `isearch-toggle-lax-whitespace'.")
556 (defvar isearch-regexp-lax-whitespace nil
557 "If non-nil, a space will match a sequence of whitespace chars.
558 When you enter a space or spaces in regexp incremental search, it
559 will match any sequence matched by the regexp defined by the variable
560 `search-whitespace-regexp'. If the value is nil, each space you type
561 matches literally, against one space. You can toggle the value of this
562 variable by the command `isearch-toggle-lax-whitespace'.")
564 (defvar isearch-cmds nil
565 "Stack of search status sets.
566 Each set is a vector of the form:
567 [STRING MESSAGE POINT SUCCESS FORWARD OTHER-END WORD
568 INVALID-REGEXP WRAPPED BARRIER WITHIN-BRACKETS CASE-FOLD-SEARCH]")
570 (defvar isearch-string "") ; The current search string.
571 (defvar isearch-message "") ; text-char-description version of isearch-string
573 (defvar isearch-message-prefix-add nil) ; Additional text for the message prefix
574 (defvar isearch-message-suffix-add nil) ; Additional text for the message suffix
576 (defvar isearch-success t) ; Searching is currently successful.
577 (defvar isearch-error nil) ; Error message for failed search.
578 (defvar isearch-other-end nil) ; Start (end) of match if forward (backward).
579 (defvar isearch-wrapped nil) ; Searching restarted from the top (bottom).
580 (defvar isearch-barrier 0
581 "Recorded minimum/maximal point for the current search.")
582 (defvar isearch-just-started nil)
583 (defvar isearch-start-hscroll 0) ; hscroll when starting the search.
585 ;; case-fold-search while searching.
586 ;; either nil, t, or 'yes. 'yes means the same as t except that mixed
587 ;; case in the search string is ignored.
588 (defvar isearch-case-fold-search nil)
590 ;; search-invisible while searching.
591 ;; either nil, t, or 'open. 'open means the same as t except that
592 ;; opens hidden overlays.
593 (defvar isearch-invisible search-invisible)
595 (defvar isearch-last-case-fold-search nil)
597 ;; Used to save default value while isearch is active
598 (defvar isearch-original-minibuffer-message-timeout nil)
600 (defvar isearch-adjusted nil)
601 (defvar isearch-slow-terminal-mode nil)
602 ;; If t, using a small window.
603 (defvar isearch-small-window nil)
604 (defvar isearch-opoint 0)
605 ;; The window configuration active at the beginning of the search.
606 (defvar isearch-window-configuration nil)
608 ;; Flag to indicate a yank occurred, so don't move the cursor.
609 (defvar isearch-yank-flag nil)
611 ;; A function to be called after each input character is processed.
612 ;; (It is not called after characters that exit the search.)
613 ;; It is only set from an optional argument to `isearch-mode'.
614 (defvar isearch-op-fun nil)
616 ;; Is isearch-mode in a recursive edit for modal searching.
617 (defvar isearch-recursive-edit nil)
619 ;; Should isearch be terminated after doing one search?
620 (defvar isearch-nonincremental nil)
622 ;; New value of isearch-forward after isearch-edit-string.
623 (defvar isearch-new-forward nil)
625 ;; Accumulate here the overlays opened during searching.
626 (defvar isearch-opened-overlays nil)
628 ;; Non-nil if the string exists but is invisible.
629 (defvar isearch-hidden nil)
631 ;; The value of input-method-function when isearch is invoked.
632 (defvar isearch-input-method-function nil)
634 ;; A flag to tell if input-method-function is locally bound when
635 ;; isearch is invoked.
636 (defvar isearch-input-method-local-p nil)
638 (defvar isearch--saved-overriding-local-map nil)
640 ;; Minor-mode-alist changes - kind of redundant with the
641 ;; echo area, but if isearching in multiple windows, it can be useful.
643 (or (assq 'isearch-mode minor-mode-alist)
644 (nconc minor-mode-alist
645 (list '(isearch-mode isearch-mode))))
647 (defvar isearch-mode nil) ;; Name of the minor mode, if non-nil.
648 (make-variable-buffer-local 'isearch-mode)
650 (define-key global-map "\C-s" 'isearch-forward)
651 (define-key esc-map "\C-s" 'isearch-forward-regexp)
652 (define-key global-map "\C-r" 'isearch-backward)
653 (define-key esc-map "\C-r" 'isearch-backward-regexp)
654 (define-key search-map "w" 'isearch-forward-word)
655 (define-key search-map "_" 'isearch-forward-symbol)
656 (define-key search-map "." 'isearch-forward-symbol-at-point)
658 ;; Entry points to isearch-mode.
660 (defun isearch-forward (&optional regexp-p no-recursive-edit)
661 "\
662 Do incremental search forward.
663 With a prefix argument, do an incremental regular expression search instead.
665 As you type characters, they add to the search string and are found.
666 The following non-printing keys are bound in `isearch-mode-map'.
670 Type LFD (C-j) to match end of line.
674 onto the end of the search string, and search for it.
677 string and search for it.
679 and search for it.
682 with string killed before it.
685 with completion.
687 back to what has
688 been found successfully.
690 starting point.
692 If you try to exit with the search string still empty, it invokes
693 nonincremental search.
702 In incremental searches, a space or spaces normally matches any whitespace
703 defined by the variable `search-whitespace-regexp'; see also the variables
704 `isearch-lax-whitespace' and `isearch-regexp-lax-whitespace'.
708 Also supported is a search ring of the previous 16 search strings.
711 ring.
715 replace from last search string.
717 with the last search string.
719 the last search string.
721 that highlights the last search string.
727 If an input method is turned on in the current buffer, that input
728 method is also active while you are typing characters to search.
730 It also toggles the input
731 method in the current buffer.
733 To use a different input method for searching, type \
735 and specify an input method you want to use.
737 The above keys, bound in `isearch-mode-map', are often controlled by
739 Other control and meta characters terminate the search
740 and are then executed normally (depending on `search-exit-option').
741 Likewise for function keys and mouse button events.
743 If this function is called non-interactively with a nil NO-RECURSIVE-EDIT,
744 it does not return to the calling function until the search is done.
745 See the function `isearch-mode' for more information."
748 (isearch-mode t (not (null regexp-p)) nil (not no-recursive-edit)))
750 (defun isearch-forward-regexp (&optional not-regexp no-recursive-edit)
751 "Do incremental search forward for regular expression.
752 With a prefix argument, do a regular string search instead.
753 Like ordinary incremental search except that your input is treated
754 as a regexp. See the command `isearch-forward' for more information.
756 In incremental searches, a space or spaces normally matches any
757 whitespace defined by the variable `search-whitespace-regexp'.
758 To search for a literal space and nothing else, enter C-q SPC.
759 To toggle whitespace matching, use `isearch-toggle-lax-whitespace'."
761 (isearch-mode t (null not-regexp) nil (not no-recursive-edit)))
763 (defun isearch-forward-word (&optional not-word no-recursive-edit)
764 "Do incremental search forward for a sequence of words.
765 With a prefix argument, do a regular string search instead.
766 Like ordinary incremental search except that your input is treated
767 as a sequence of words without regard to how the words are separated.
768 See the command `isearch-forward' for more information."
770 (isearch-mode t nil nil (not no-recursive-edit) (null not-word)))
772 (defun isearch-forward-symbol (&optional _not-symbol no-recursive-edit)
773 "Do incremental search forward for a symbol.
774 The prefix argument is currently unused.
775 Like ordinary incremental search except that your input is treated
777 See the command `isearch-forward' for more information."
779 (isearch-mode t nil nil (not no-recursive-edit) 'isearch-symbol-regexp))
781 (defun isearch-backward (&optional regexp-p no-recursive-edit)
782 "Do incremental search backward.
783 With a prefix argument, do a regular expression search instead.
784 See the command `isearch-forward' for more information."
786 (isearch-mode nil (not (null regexp-p)) nil (not no-recursive-edit)))
788 (defun isearch-backward-regexp (&optional not-regexp no-recursive-edit)
789 "Do incremental search backward for regular expression.
790 With a prefix argument, do a regular string search instead.
791 Like ordinary incremental search except that your input is treated
792 as a regexp. See the command `isearch-forward' for more information."
794 (isearch-mode nil (null not-regexp) nil (not no-recursive-edit)))
796 (defun isearch-forward-symbol-at-point ()
797 "Do incremental search forward for a symbol found near point.
798 Like ordinary incremental search except that the symbol found at point
799 is added to the search string initially as a regexp surrounded
801 See the command `isearch-forward-symbol' for more information."
802 (interactive)
803 (isearch-forward-symbol nil 1)
804 (let ((bounds (find-tag-default-bounds)))
805 (cond
806 (bounds
807 (when (< (car bounds) (point))
808 (goto-char (car bounds)))
809 (isearch-yank-string
810 (buffer-substring-no-properties (car bounds) (cdr bounds))))
811 (t
812 (setq isearch-error "No symbol at point")
813 (isearch-update)))))
815 \f
816 ;; isearch-mode only sets up incremental search for the minor mode.
817 ;; All the work is done by the isearch-mode commands.
819 ;; Not used yet:
820 ;;(defvar isearch-commands '(isearch-forward isearch-backward
821 ;; isearch-forward-regexp isearch-backward-regexp)
822 ;; "List of commands for which isearch-mode does not recursive-edit.")
825 (defun isearch-mode (forward &optional regexp op-fun recursive-edit word)
826 "Start Isearch minor mode.
827 It is called by the function `isearch-forward' and other related functions.
829 The non-nil arg FORWARD means searching in the forward direction.
831 The non-nil arg REGEXP does an incremental regular expression search.
833 The arg OP-FUN is a function to be called after each input character
834 is processed. (It is not called after characters that exit the search.)
836 When the arg RECURSIVE-EDIT is non-nil, this function behaves modally and
837 does not return to the calling function until the search is completed.
838 To behave this way it enters a recursive-edit and exits it when done
839 isearching.
841 The arg WORD, if t, does incremental search for a sequence of words,
842 ignoring punctuation. If the value is a function, it is called to
843 convert the search string to a regexp used by regexp search functions."
845 ;; Initialize global vars.
846 (setq isearch-forward forward
847 isearch-regexp regexp
848 isearch-word word
849 isearch-op-fun op-fun
850 isearch-last-case-fold-search isearch-case-fold-search
851 isearch-case-fold-search case-fold-search
852 isearch-invisible search-invisible
853 isearch-string ""
854 isearch-message ""
855 isearch-cmds nil
856 isearch-success t
857 isearch-wrapped nil
858 isearch-barrier (point)
859 isearch-adjusted nil
860 isearch-yank-flag nil
861 isearch-error nil
862 isearch-slow-terminal-mode (and (<= baud-rate search-slow-speed)
863 (> (window-height)
864 (* 4
865 (abs search-slow-window-lines))))
866 isearch-other-end nil
867 isearch-small-window nil
868 isearch-just-started t
869 isearch-start-hscroll (window-hscroll)
871 isearch-opoint (point)
872 search-ring-yank-pointer nil
873 isearch-opened-overlays nil
874 isearch-input-method-function input-method-function
875 isearch-input-method-local-p (local-variable-p 'input-method-function)
876 regexp-search-ring-yank-pointer nil
878 ;; Save the original value of `minibuffer-message-timeout', and
879 ;; set it to nil so that isearch's messages don't get timed out.
880 isearch-original-minibuffer-message-timeout minibuffer-message-timeout
881 minibuffer-message-timeout nil)
883 ;; We must bypass input method while reading key. When a user type
884 ;; printable character, appropriate input method is turned on in
885 ;; minibuffer to read multibyte characters.
886 (or isearch-input-method-local-p
887 (make-local-variable 'input-method-function))
888 (setq input-method-function nil)
890 (looking-at "")
891 (setq isearch-window-configuration
892 (if isearch-slow-terminal-mode (current-window-configuration) nil))
894 ;; Maybe make minibuffer frame visible and/or raise it.
895 (let ((frame (window-frame (minibuffer-window))))
896 (unless (memq (frame-live-p frame) '(nil t))
897 (unless (frame-visible-p frame)
898 (make-frame-visible frame))
899 (if minibuffer-auto-raise
900 (raise-frame frame))))
902 (setq isearch-mode " Isearch") ;; forward? regexp?
903 (force-mode-line-update)
905 (setq overriding-terminal-local-map isearch-mode-map)
906 (run-hooks 'isearch-mode-hook)
907 ;; Remember the initial map possibly modified
908 ;; by external packages in isearch-mode-hook. (Bug#16035)
909 (setq isearch--saved-overriding-local-map overriding-terminal-local-map)
911 ;; Pushing the initial state used to be before running isearch-mode-hook,
912 ;; but a hook might set `isearch-push-state-function' used in
913 ;; `isearch-push-state' to save mode-specific initial state. (Bug#4994)
914 (isearch-push-state)
916 (isearch-update)
918 (add-hook 'pre-command-hook 'isearch-pre-command-hook)
919 (add-hook 'post-command-hook 'isearch-post-command-hook)
920 (add-hook 'mouse-leave-buffer-hook 'isearch-done)
921 (add-hook 'kbd-macro-termination-hook 'isearch-done)
923 ;; isearch-mode can be made modal (in the sense of not returning to
924 ;; the calling function until searching is completed) by entering
925 ;; a recursive-edit and exiting it when done isearching.
926 (if recursive-edit
927 (let ((isearch-recursive-edit t))
928 (recursive-edit)))
929 isearch-success)
932 ;; Some high level utilities. Others below.
934 (defun isearch-update ()
935 "This is called after every isearch command to update the display.
936 The last thing it does is to run `isearch-update-post-hook'."
937 (if (and (null unread-command-events)
938 (null executing-kbd-macro))
939 (progn
940 (if (not (input-pending-p))
941 (if isearch-message-function
942 (funcall isearch-message-function)
943 (isearch-message)))
944 (if (and isearch-slow-terminal-mode
945 (not (or isearch-small-window
946 (pos-visible-in-window-p))))
947 (let ((found-point (point)))
948 (setq isearch-small-window t)
949 (move-to-window-line 0)
950 (let ((window-min-height 1))
951 (split-window nil (if (< search-slow-window-lines 0)
952 (1+ (- search-slow-window-lines))
953 (- (window-height)
954 (1+ search-slow-window-lines)))))
955 (if (< search-slow-window-lines 0)
956 (progn (vertical-motion (- 1 search-slow-window-lines))
957 (set-window-start (next-window) (point))
958 (set-window-hscroll (next-window)
959 (window-hscroll))
960 (set-window-hscroll (selected-window) 0))
961 (other-window 1))
962 (goto-char found-point))
963 ;; Keep same hscrolling as at the start of the search when possible
964 (let ((current-scroll (window-hscroll)))
965 (set-window-hscroll (selected-window) isearch-start-hscroll)
966 (unless (pos-visible-in-window-p)
967 (set-window-hscroll (selected-window) current-scroll))))
968 (if isearch-other-end
969 (if (< isearch-other-end (point)) ; isearch-forward?
970 (isearch-highlight isearch-other-end (point))
971 (isearch-highlight (point) isearch-other-end))
972 (isearch-dehighlight))))
973 (setq ;; quit-flag nil not for isearch-mode
974 isearch-adjusted nil
975 isearch-yank-flag nil)
976 (when isearch-lazy-highlight
977 (isearch-lazy-highlight-new-loop))
978 ;; We must prevent the point moving to the end of composition when a
979 ;; part of the composition has just been searched.
980 (setq disable-point-adjustment t)
981 (run-hooks 'isearch-update-post-hook))
983 (defun isearch-done (&optional nopush edit)
984 "Exit Isearch mode.
985 For successful search, pass no args.
986 For a failing search, NOPUSH is t.
987 For going to the minibuffer to edit the search string,
988 NOPUSH is t and EDIT is t."
990 (if isearch-resume-in-command-history
991 (let ((command `(isearch-resume ,isearch-string ,isearch-regexp
992 ,isearch-word ,isearch-forward
993 ,isearch-message
994 ',isearch-case-fold-search)))
995 (unless (equal (car command-history) command)
996 (setq command-history (cons command command-history)))))
998 (remove-hook 'pre-command-hook 'isearch-pre-command-hook)
999 (remove-hook 'post-command-hook 'isearch-post-command-hook)
1000 (remove-hook 'mouse-leave-buffer-hook 'isearch-done)
1001 (remove-hook 'kbd-macro-termination-hook 'isearch-done)
1002 (setq isearch-lazy-highlight-start nil)
1004 ;; Called by all commands that terminate isearch-mode.
1005 ;; If NOPUSH is non-nil, we don't push the string on the search ring.
1006 (setq overriding-terminal-local-map nil)
1007 ;; (setq pre-command-hook isearch-old-pre-command-hook) ; for lemacs
1008 (setq minibuffer-message-timeout isearch-original-minibuffer-message-timeout)
1009 (isearch-dehighlight)
1010 (lazy-highlight-cleanup lazy-highlight-cleanup)
1011 (let ((found-start (window-start))
1012 (found-point (point)))
1013 (when isearch-window-configuration
1014 (set-window-configuration isearch-window-configuration)
1015 (if isearch-small-window
1016 (goto-char found-point)
1017 ;; set-window-configuration clobbers window-start; restore it.
1018 ;; This has an annoying side effect of clearing the last_modiff
1019 ;; field of the window, which can cause unwanted scrolling,
1020 ;; so don't do it unless truly necessary.
1021 (set-window-start (selected-window) found-start t))))
1023 (setq isearch-mode nil)
1024 (if isearch-input-method-local-p
1025 (setq input-method-function isearch-input-method-function)
1026 (kill-local-variable 'input-method-function))
1028 (force-mode-line-update)
1030 ;; If we ended in the middle of some intangible text,
1031 ;; move to the further end of that intangible text.
1032 (let ((after (if (eobp) nil
1033 (get-text-property (point) 'intangible)))
1034 (before (if (bobp) nil
1035 (get-text-property (1- (point)) 'intangible))))
1036 (when (and before after (eq before after))
1037 (goto-char
1038 (if isearch-forward
1039 (next-single-property-change (point) 'intangible)
1040 (previous-single-property-change (point) 'intangible)))))
1042 (if (and (> (length isearch-string) 0) (not nopush))
1043 ;; Update the ring data.
1044 (isearch-update-ring isearch-string isearch-regexp))
1046 (let ((isearch-mode-end-hook-quit (and nopush (not edit))))
1047 (run-hooks 'isearch-mode-end-hook))
1049 ;; If there was movement, mark the starting position.
1050 ;; Maybe should test difference between and set mark only if > threshold.
1051 (if (/= (point) isearch-opoint)
1052 (or (and transient-mark-mode mark-active)
1053 (progn
1054 (push-mark isearch-opoint t)
1055 (or executing-kbd-macro (> (minibuffer-depth) 0) edit
1056 (message "Mark saved where search started")))))
1058 (and (not edit) isearch-recursive-edit (exit-recursive-edit)))
1060 (defun isearch-update-ring (string &optional regexp)
1061 "Add STRING to the beginning of the search ring.
1062 REGEXP if non-nil says use the regexp search ring."
1063 (add-to-history
1064 (if regexp 'regexp-search-ring 'search-ring)
1065 string
1066 (if regexp regexp-search-ring-max search-ring-max)))
1068 ;; Switching buffers should first terminate isearch-mode.
1069 ;; ;; For Emacs 19, the frame switch event is handled.
1070 ;; (defun isearch-switch-frame-handler ()
1071 ;; (interactive) ;; Is this necessary?
1072 ;; ;; First terminate isearch-mode.
1073 ;; (isearch-done)
1074 ;; (isearch-clean-overlays)
1075 ;; (handle-switch-frame (car (cdr last-command-event))))
1077 \f
1078 ;; The search status structure and stack.
1080 (cl-defstruct (isearch--state
1081 (:constructor nil)
1082 (:copier nil)
1083 (:constructor isearch--get-state
1084 (&aux
1085 (string isearch-string)
1086 (message isearch-message)
1087 (point (point))
1088 (success isearch-success)
1089 (forward isearch-forward)
1090 (other-end isearch-other-end)
1091 (word isearch-word)
1092 (error isearch-error)
1093 (wrapped isearch-wrapped)
1094 (barrier isearch-barrier)
1095 (case-fold-search isearch-case-fold-search)
1096 (pop-fun (if isearch-push-state-function
1097 (funcall isearch-push-state-function))))))
1098 (string :read-only t)
1099 (message :read-only t)
1100 (point :read-only t)
1101 (success :read-only t)
1102 (forward :read-only t)
1103 (other-end :read-only t)
1104 (word :read-only t)
1105 (error :read-only t)
1106 (wrapped :read-only t)
1107 (barrier :read-only t)
1108 (case-fold-search :read-only t)
1109 (pop-fun :read-only t))
1111 (defun isearch--set-state (cmd)
1112 (setq isearch-string (isearch--state-string cmd)
1113 isearch-message (isearch--state-message cmd)
1114 isearch-success (isearch--state-success cmd)
1115 isearch-forward (isearch--state-forward cmd)
1116 isearch-other-end (isearch--state-other-end cmd)
1117 isearch-word (isearch--state-word cmd)
1118 isearch-error (isearch--state-error cmd)
1119 isearch-wrapped (isearch--state-wrapped cmd)
1120 isearch-barrier (isearch--state-barrier cmd)
1121 isearch-case-fold-search (isearch--state-case-fold-search cmd))
1122 (if (functionp (isearch--state-pop-fun cmd))
1123 (funcall (isearch--state-pop-fun cmd) cmd))
1124 (goto-char (isearch--state-point cmd)))
1126 (defun isearch-pop-state ()
1127 (setq isearch-cmds (cdr isearch-cmds))
1128 (isearch--set-state (car isearch-cmds)))
1130 (defun isearch-push-state ()
1131 (push (isearch--get-state) isearch-cmds))
1133 \f
1134 ;; Commands active while inside of the isearch minor mode.
1136 (defun isearch-exit ()
1137 "Exit search normally.
1138 However, if this is the first command after starting incremental
1139 search and `search-nonincremental-instead' is non-nil, do a
1140 nonincremental search instead via `isearch-edit-string'."
1141 (interactive)
1142 (if (and search-nonincremental-instead
1143 (= 0 (length isearch-string)))
1144 (let ((isearch-nonincremental t))
1145 (isearch-edit-string)))
1146 (isearch-done)
1147 (isearch-clean-overlays))
1149 (defvar minibuffer-history-symbol) ;; from external package gmhist.el
1151 (defun isearch-fail-pos (&optional msg)
1152 "Return position of first mismatch in search string, or nil if none.
1153 If MSG is non-nil, use variable `isearch-message', otherwise `isearch-string'."
1154 (let ((cmds isearch-cmds)
1155 (curr-msg (if msg isearch-message isearch-string))
1156 succ-msg)
1157 (when (or (not isearch-success) isearch-error)
1158 (while (and cmds
1159 (or (not (isearch--state-success (car cmds)))
1160 (isearch--state-error (car cmds))))
1161 (pop cmds))
1162 (setq succ-msg (and cmds (if msg (isearch--state-message (car cmds))
1163 (isearch--state-string (car cmds)))))
1164 (if (and (stringp succ-msg)
1165 (< (length succ-msg) (length curr-msg))
1166 (equal succ-msg
1167 (substring curr-msg 0 (length succ-msg))))
1168 (length succ-msg)
1169 0))))
1171 (defmacro with-isearch-suspended (&rest body)
1172 "Exit Isearch mode, run BODY, and reinvoke the pending search.
1173 You can update the global isearch variables by setting new values to
1174 `isearch-new-string', `isearch-new-message', `isearch-new-forward',
1175 `isearch-new-word', `isearch-new-case-fold'."
1176 ;; This code is very hairy for several reasons, explained in the code.
1177 ;; Mainly, isearch-mode must be terminated while editing and then restarted.
1178 ;; If there were a way to catch any change of buffer from the minibuffer,
1179 ;; this could be simplified greatly.
1180 ;; Editing doesn't back up the search point. Should it?
1181 `(condition-case nil
1182 (progn
1183 (let ((isearch-nonincremental isearch-nonincremental)
1185 ;; Locally bind all isearch global variables to protect them
1186 ;; from recursive isearching.
1187 ;; isearch-string -message and -forward are not bound
1188 ;; so they may be changed. Instead, save the values.
1189 (isearch-new-string isearch-string)
1190 (isearch-new-message isearch-message)
1191 (isearch-new-forward isearch-forward)
1192 (isearch-new-word isearch-word)
1193 (isearch-new-case-fold isearch-case-fold-search)
1195 (isearch-regexp isearch-regexp)
1196 (isearch-op-fun isearch-op-fun)
1197 (isearch-cmds isearch-cmds)
1198 (isearch-success isearch-success)
1199 (isearch-wrapped isearch-wrapped)
1200 (isearch-barrier isearch-barrier)
1201 (isearch-adjusted isearch-adjusted)
1202 (isearch-yank-flag isearch-yank-flag)
1203 (isearch-error isearch-error)
1204 ;;; Don't bind this. We want isearch-search, below, to set it.
1205 ;;; And the old value won't matter after that.
1206 ;;; (isearch-other-end isearch-other-end)
1207 ;;; Perhaps some of these other variables should be bound for a
1208 ;;; shorter period, ending before the next isearch-search.
1209 ;;; But there doesn't seem to be a real bug, so let's not risk it now.
1210 (isearch-opoint isearch-opoint)
1211 (isearch-slow-terminal-mode isearch-slow-terminal-mode)
1212 (isearch-small-window isearch-small-window)
1213 (isearch-recursive-edit isearch-recursive-edit)
1214 ;; Save current configuration so we can restore it here.
1215 (isearch-window-configuration (current-window-configuration))
1217 ;; This could protect the index of the search rings,
1218 ;; but we can't reliably count the number of typed M-p
1219 ;; in `read-from-minibuffer' to adjust the index accordingly.
1220 ;; So when the following is commented out, `isearch-mode'
1221 ;; below resets the index to the predictable value nil.
1222 ;; (search-ring-yank-pointer search-ring-yank-pointer)
1223 ;; (regexp-search-ring-yank-pointer regexp-search-ring-yank-pointer)
1225 ;; Temporarily restore `minibuffer-message-timeout'.
1226 (minibuffer-message-timeout
1227 isearch-original-minibuffer-message-timeout)
1228 (isearch-original-minibuffer-message-timeout
1229 isearch-original-minibuffer-message-timeout)
1230 old-point old-other-end)
1232 ;; Actually terminate isearching until editing is done.
1233 ;; This is so that the user can do anything without failure,
1234 ;; like switch buffers and start another isearch, and return.
1235 (condition-case nil
1236 (isearch-done t t)
1237 (exit nil)) ; was recursive editing
1239 ;; Save old point and isearch-other-end before reading from minibuffer
1240 ;; that can change their values.
1241 (setq old-point (point) old-other-end isearch-other-end)
1243 (unwind-protect
1244 (progn ,@body)
1246 ;; Set point at the start (end) of old match if forward (backward),
1247 ;; so after exiting minibuffer isearch resumes at the start (end)
1248 ;; of this match and can find it again.
1249 (if (and old-other-end (eq old-point (point))
1250 (eq isearch-forward isearch-new-forward))
1251 (goto-char old-other-end))
1253 ;; Always resume isearching by restarting it.
1254 (isearch-mode isearch-forward
1255 isearch-regexp
1256 isearch-op-fun
1257 nil
1258 isearch-word)
1260 ;; Copy new local values to isearch globals
1261 (setq isearch-string isearch-new-string
1262 isearch-message isearch-new-message
1263 isearch-forward isearch-new-forward
1264 isearch-word isearch-new-word
1265 isearch-case-fold-search isearch-new-case-fold))
1267 ;; Empty isearch-string means use default.
1268 (when (= 0 (length isearch-string))
1269 (setq isearch-string (or (car (if isearch-regexp
1270 regexp-search-ring
1271 search-ring))
1272 "")
1274 isearch-message
1275 (mapconcat 'isearch-text-char-description
1276 isearch-string ""))
1277 ;; After taking the last element, adjust ring to previous one.
1278 (isearch-ring-adjust1 nil)))
1280 ;; This used to push the state as of before this C-s, but it adds
1281 ;; an inconsistent state where part of variables are from the
1282 ;; previous search (e.g. `isearch-success'), and part of variables
1283 ;; are just entered from the minibuffer (e.g. `isearch-string').
1284 ;; (isearch-push-state)
1286 ;; Reinvoke the pending search.
1287 (isearch-search)
1288 (isearch-push-state) ; this pushes the correct state
1289 (isearch-update)
1290 (if isearch-nonincremental
1291 (progn
1292 ;; (sit-for 1) ;; needed if isearch-done does: (message "")
1293 (isearch-done)
1294 ;; The search done message is confusing when the string
1295 ;; is empty, so erase it.
1296 (if (equal isearch-string "")
1297 (message "")))))
1299 (quit ; handle abort-recursive-edit
1300 (isearch-abort) ;; outside of let to restore outside global values
1301 )))
1303 (defun isearch-edit-string ()
1304 "Edit the search string in the minibuffer.
1305 The following additional command keys are active while editing.
1311 (interactive)
1312 (with-isearch-suspended
1313 (let* ((message-log-max nil)
1314 ;; Don't add a new search string to the search ring here
1315 ;; in `read-from-minibuffer'. It should be added only
1316 ;; by `isearch-update-ring' called from `isearch-done'.
1317 (history-add-new-input nil)
1318 ;; Binding minibuffer-history-symbol to nil is a work-around
1319 ;; for some incompatibility with gmhist.
1320 (minibuffer-history-symbol))
1321 (setq isearch-new-string
1322 (read-from-minibuffer
1323 (isearch-message-prefix nil isearch-nonincremental)
1324 (cons isearch-string (1+ (or (isearch-fail-pos)
1325 (length isearch-string))))
1326 minibuffer-local-isearch-map nil
1327 (if isearch-regexp
1328 (cons 'regexp-search-ring
1329 (1+ (or regexp-search-ring-yank-pointer -1)))
1330 (cons 'search-ring
1331 (1+ (or search-ring-yank-pointer -1))))
1332 nil t)
1333 isearch-new-message
1334 (mapconcat 'isearch-text-char-description
1335 isearch-new-string "")))))
1337 (defun isearch-nonincremental-exit-minibuffer ()
1338 (interactive)
1339 (setq isearch-nonincremental t)
1340 (exit-minibuffer))
1341 ;; Changing the value of `isearch-nonincremental' has no effect here,
1342 ;; because `isearch-edit-string' ignores this change. Thus marked as obsolete.
1343 (make-obsolete 'isearch-nonincremental-exit-minibuffer 'exit-minibuffer "24.4")
1345 (defun isearch-forward-exit-minibuffer ()
1346 "Resume isearching forward from the minibuffer that edits the search string."
1347 (interactive)
1348 (setq isearch-new-forward t)
1349 (exit-minibuffer))
1351 (defun isearch-reverse-exit-minibuffer ()
1352 "Resume isearching backward from the minibuffer that edits the search string."
1353 (interactive)
1354 (setq isearch-new-forward nil)
1355 (exit-minibuffer))
1357 (defun isearch-cancel ()
1358 "Terminate the search and go back to the starting point."
1359 (interactive)
1360 (if (and isearch-push-state-function isearch-cmds)
1361 ;; For defined push-state function, restore the first state.
1362 ;; This calls pop-state function and restores original point.
1363 (let ((isearch-cmds (last isearch-cmds)))
1364 (isearch--set-state (car isearch-cmds)))
1365 (goto-char isearch-opoint))
1366 (isearch-done t) ; Exit isearch..
1367 (isearch-clean-overlays)
1368 (signal 'quit nil)) ; ..and pass on quit signal.
1370 (defun isearch-abort ()
1371 "Abort incremental search mode if searching is successful, signaling quit.
1372 Otherwise, revert to previous successful search and continue searching.
1373 Use `isearch-exit' to quit without signaling."
1374 (interactive)
1375 ;; (ding) signal instead below, if quitting
1376 (discard-input)
1377 (if (and isearch-success (not isearch-error))
1378 ;; If search is successful and has no incomplete regexp,
1379 ;; move back to starting point and really do quit.
1380 (progn
1381 (setq isearch-success nil)
1382 (isearch-cancel))
1383 ;; If search is failing, or has an incomplete regexp,
1384 ;; rub out until it is once more successful.
1385 (while (or (not isearch-success) isearch-error)
1386 (isearch-pop-state))
1387 (isearch-update)))
1389 (defun isearch-repeat (direction)
1390 ;; Utility for isearch-repeat-forward and -backward.
1391 (if (eq isearch-forward (eq direction 'forward))
1392 ;; C-s in forward or C-r in reverse.
1393 (if (equal isearch-string "")
1394 ;; If search string is empty, use last one.
1395 (if (null (if isearch-regexp regexp-search-ring search-ring))
1396 (setq isearch-error "No previous search string")
1397 (setq isearch-string
1398 (car (if isearch-regexp regexp-search-ring search-ring))
1399 isearch-message
1400 (mapconcat 'isearch-text-char-description
1401 isearch-string "")
1402 isearch-case-fold-search isearch-last-case-fold-search)
1403 ;; After taking the last element, adjust ring to previous one.
1404 (isearch-ring-adjust1 nil))
1405 ;; If already have what to search for, repeat it.
1406 (or isearch-success
1407 (progn
1408 ;; Set isearch-wrapped before calling isearch-wrap-function
1409 (setq isearch-wrapped t)
1410 (if isearch-wrap-function
1411 (funcall isearch-wrap-function)
1412 (goto-char (if isearch-forward (point-min) (point-max)))))))
1413 ;; C-s in reverse or C-r in forward, change direction.
1414 (setq isearch-forward (not isearch-forward)
1415 isearch-success t))
1417 (setq isearch-barrier (point)) ; For subsequent \| if regexp.
1419 (if (equal isearch-string "")
1420 (setq isearch-success t)
1421 (if (and isearch-success
1422 (equal (point) isearch-other-end)
1423 (not isearch-just-started))
1424 ;; If repeating a search that found
1425 ;; an empty string, ensure we advance.
1426 (if (if isearch-forward (eobp) (bobp))
1427 ;; If there's nowhere to advance to, fail (and wrap next time).
1428 (progn
1429 (setq isearch-success nil)
1430 (ding))
1431 (forward-char (if isearch-forward 1 -1))
1432 (isearch-search))
1433 (isearch-search)))
1435 (isearch-push-state)
1436 (isearch-update))
1438 (defun isearch-repeat-forward ()
1439 "Repeat incremental search forwards."
1440 (interactive)
1441 (isearch-repeat 'forward))
1443 (defun isearch-repeat-backward ()
1444 "Repeat incremental search backwards."
1445 (interactive)
1446 (isearch-repeat 'backward))
1448 (defun isearch-toggle-regexp ()
1449 "Toggle regexp searching on or off."
1450 ;; The status stack is left unchanged.
1451 (interactive)
1452 (setq isearch-regexp (not isearch-regexp))
1453 (if isearch-regexp (setq isearch-word nil))
1454 (setq isearch-success t isearch-adjusted t)
1455 (isearch-update))
1457 (defun isearch-toggle-word ()
1458 "Toggle word searching on or off."
1459 ;; The status stack is left unchanged.
1460 (interactive)
1461 (setq isearch-word (not isearch-word))
1462 (if isearch-word (setq isearch-regexp nil))
1463 (setq isearch-success t isearch-adjusted t)
1464 (isearch-update))
1466 (defun isearch-toggle-symbol ()
1467 "Toggle symbol searching on or off."
1468 (interactive)
1469 (setq isearch-word (unless (eq isearch-word 'isearch-symbol-regexp)
1470 'isearch-symbol-regexp))
1471 (if isearch-word (setq isearch-regexp nil))
1472 (setq isearch-success t isearch-adjusted t)
1473 (isearch-update))
1475 (defun isearch-toggle-lax-whitespace ()
1476 "Toggle whitespace matching in searching on or off.
1477 In ordinary search, toggles the value of the variable
1478 `isearch-lax-whitespace'. In regexp search, toggles the
1479 value of the variable `isearch-regexp-lax-whitespace'."
1480 (interactive)
1481 (if isearch-regexp
1482 (setq isearch-regexp-lax-whitespace (not isearch-regexp-lax-whitespace))
1483 (setq isearch-lax-whitespace (not isearch-lax-whitespace)))
1484 (let ((message-log-max nil))
1485 (message "%s%s [%s]"
1486 (isearch-message-prefix nil isearch-nonincremental)
1487 isearch-message
1488 (if (if isearch-regexp
1489 isearch-regexp-lax-whitespace
1490 isearch-lax-whitespace)
1491 "match spaces loosely"
1492 "match spaces literally")))
1493 (setq isearch-success t isearch-adjusted t)
1494 (sit-for 1)
1495 (isearch-update))
1497 (defun isearch-toggle-case-fold ()
1498 "Toggle case folding in searching on or off.
1499 Toggles the value of the variable `isearch-case-fold-search'."
1500 (interactive)
1501 (setq isearch-case-fold-search
1502 (if isearch-case-fold-search nil 'yes))
1503 (let ((message-log-max nil))
1504 (message "%s%s [case %ssensitive]"
1505 (isearch-message-prefix nil isearch-nonincremental)
1506 isearch-message
1507 (if isearch-case-fold-search "in" "")))
1508 (setq isearch-success t isearch-adjusted t)
1509 (sit-for 1)
1510 (isearch-update))
1512 (defun isearch-toggle-invisible ()
1513 "Toggle searching in invisible text on or off.
1514 Toggles the variable `isearch-invisible' between values
1515 nil and a non-nil value of the option `search-invisible'
1516 \(or `open' if `search-invisible' is nil)."
1517 (interactive)
1518 (setq isearch-invisible
1519 (if isearch-invisible nil (or search-invisible 'open)))
1520 (let ((message-log-max nil))
1521 (message "%s%s [match %svisible text]"
1522 (isearch-message-prefix nil isearch-nonincremental)
1523 isearch-message
1524 (if isearch-invisible "in" "")))
1525 (setq isearch-success t isearch-adjusted t)
1526 (sit-for 1)
1527 (isearch-update))
1529 \f
1530 ;; Word search
1532 (defun word-search-regexp (string &optional lax)
1533 "Return a regexp which matches words, ignoring punctuation.
1534 Given STRING, a string of words separated by word delimiters,
1535 compute a regexp that matches those exact words separated by
1536 arbitrary punctuation. If the string begins or ends in whitespace,
1537 the beginning or the end of the string matches arbitrary whitespace.
1538 Otherwise if LAX is non-nil, the beginning or the end of the string
1539 need not match a word boundary.
1541 Used in `word-search-forward', `word-search-backward',
1542 `word-search-forward-lax', `word-search-backward-lax'."
1543 (cond
1544 ((equal string "") "")
1546 (t (concat
1553 (defun word-search-backward (string &optional bound noerror count)
1554 "Search backward from point for STRING, ignoring differences in punctuation.
1555 Set point to the beginning of the occurrence found, and return point.
1556 An optional second argument bounds the search; it is a buffer position.
1557 The match found must not extend before that position.
1558 Optional third argument, if t, means if fail just return nil (no error).
1559 If not nil and not t, move to limit of search and return nil.
1560 Optional fourth argument is repeat count--search for successive occurrences.
1562 Relies on the function `word-search-regexp' to convert a sequence
1563 of words in STRING to a regexp used to search words without regard
1564 to punctuation."
1565 (interactive "sWord search backward: ")
1566 (re-search-backward (word-search-regexp string nil) bound noerror count))
1568 (defun word-search-forward (string &optional bound noerror count)
1569 "Search forward from point for STRING, ignoring differences in punctuation.
1570 Set point to the end of the occurrence found, and return point.
1571 An optional second argument bounds the search; it is a buffer position.
1572 The match found must not extend after that position.
1573 Optional third argument, if t, means if fail just return nil (no error).
1574 If not nil and not t, move to limit of search and return nil.
1575 Optional fourth argument is repeat count--search for successive occurrences.
1577 Relies on the function `word-search-regexp' to convert a sequence
1578 of words in STRING to a regexp used to search words without regard
1579 to punctuation."
1580 (interactive "sWord search: ")
1581 (re-search-forward (word-search-regexp string nil) bound noerror count))
1583 (defun word-search-backward-lax (string &optional bound noerror count)
1584 "Search backward from point for STRING, ignoring differences in punctuation.
1585 Set point to the beginning of the occurrence found, and return point.
1587 Unlike `word-search-backward', the end of STRING need not match a word
1588 boundary, unless STRING ends in whitespace.
1590 An optional second argument bounds the search; it is a buffer position.
1591 The match found must not extend before that position.
1592 Optional third argument, if t, means if fail just return nil (no error).
1593 If not nil and not t, move to limit of search and return nil.
1594 Optional fourth argument is repeat count--search for successive occurrences.
1596 Relies on the function `word-search-regexp' to convert a sequence
1597 of words in STRING to a regexp used to search words without regard
1598 to punctuation."
1599 (interactive "sWord search backward: ")
1600 (re-search-backward (word-search-regexp string t) bound noerror count))
1602 (defun word-search-forward-lax (string &optional bound noerror count)
1603 "Search forward from point for STRING, ignoring differences in punctuation.
1604 Set point to the end of the occurrence found, and return point.
1606 Unlike `word-search-forward', the end of STRING need not match a word
1607 boundary, unless STRING ends in whitespace.
1609 An optional second argument bounds the search; it is a buffer position.
1610 The match found must not extend after that position.
1611 Optional third argument, if t, means if fail just return nil (no error).
1612 If not nil and not t, move to limit of search and return nil.
1613 Optional fourth argument is repeat count--search for successive occurrences.
1615 Relies on the function `word-search-regexp' to convert a sequence
1616 of words in STRING to a regexp used to search words without regard
1617 to punctuation."
1618 (interactive "sWord search: ")
1619 (re-search-forward (word-search-regexp string t) bound noerror count))
1621 ;; Symbol search
1623 (defun isearch-symbol-regexp (string &optional lax)
1624 "Return a regexp which matches STRING as a symbol.
1626 If there are more than one symbol, then compute a regexp that matches
1627 those exact symbols separated by non-symbol characters. If the string
1628 begins or ends in whitespace, the beginning or the end of the string
1629 matches arbitrary non-symbol whitespace. Otherwise if LAX is non-nil,
1630 the beginning or the end of the string need not match a symbol boundary."
1631 (let ((not-word-symbol-re
1632 ;; This regexp matches all syntaxes except word and symbol syntax.
1633 ;; FIXME: Replace it with something shorter if possible (bug#14602).
1634 "\\(?:\\s-\\|\\s.\\|\\s(\\|\\s)\\|\\s\"\\|\\s\\\\|\\s/\\|\\s$\\|\\s'\\|\\s<\\|\\s>\\|\\s@\\|\\s!\\|\\s|\\)+"))
1635 (cond
1636 ((equal string "") "")
1638 (t (concat
1641 (mapconcat 'regexp-quote (split-string string not-word-symbol-re t) not-word-symbol-re)
1645 (put 'isearch-symbol-regexp 'isearch-message-prefix "symbol ")
1647 ;; Search with lax whitespace
1649 (defun search-forward-lax-whitespace (string &optional bound noerror count)
1650 "Search forward for STRING, matching a sequence of whitespace chars."
1651 (let ((search-spaces-regexp search-whitespace-regexp))
1652 (re-search-forward (regexp-quote string) bound noerror count)))
1654 (defun search-backward-lax-whitespace (string &optional bound noerror count)
1655 "Search backward for STRING, matching a sequence of whitespace chars."
1656 (let ((search-spaces-regexp search-whitespace-regexp))
1657 (re-search-backward (regexp-quote string) bound noerror count)))
1659 (defun re-search-forward-lax-whitespace (regexp &optional bound noerror count)
1660 "Search forward for REGEXP, matching a sequence of whitespace chars."
1661 (let ((search-spaces-regexp search-whitespace-regexp))
1662 (re-search-forward regexp bound noerror count)))
1664 (defun re-search-backward-lax-whitespace (regexp &optional bound noerror count)
1665 "Search backward for REGEXP, matching a sequence of whitespace chars."
1666 (let ((search-spaces-regexp search-whitespace-regexp))
1667 (re-search-backward regexp bound noerror count)))
1669 \f
1670 (defun isearch-query-replace (&optional delimited regexp-flag)
1671 "Start `query-replace' with string to replace from last search string.
1672 The arg DELIMITED (prefix arg if interactive), if non-nil, means replace
1673 only matches surrounded by word boundaries. Note that using the prefix arg
1674 is possible only when `isearch-allow-scroll' is non-nil or
1675 `isearch-allow-prefix' is non-nil, and it doesn't always provide the
1676 correct matches for `query-replace', so the preferred way to run word
1677 replacements from Isearch is `M-s w ... M-%'."
1678 (interactive
1679 (list current-prefix-arg))
1680 (barf-if-buffer-read-only)
1681 (if regexp-flag (setq isearch-regexp t))
1682 (let ((case-fold-search isearch-case-fold-search)
1683 ;; set `search-upper-case' to nil to not call
1684 ;; `isearch-no-upper-case-p' in `perform-replace'
1685 (search-upper-case nil)
1686 (search-invisible isearch-invisible)
1687 (replace-lax-whitespace
1688 isearch-lax-whitespace)
1689 (replace-regexp-lax-whitespace
1690 isearch-regexp-lax-whitespace)
1691 ;; Set `isearch-recursive-edit' to nil to prevent calling
1692 ;; `exit-recursive-edit' in `isearch-done' that terminates
1693 ;; the execution of this command when it is non-nil.
1694 ;; We call `exit-recursive-edit' explicitly at the end below.
1695 (isearch-recursive-edit nil))
1696 (isearch-done nil t)
1697 (isearch-clean-overlays)
1698 (if (and isearch-other-end
1699 (< isearch-other-end (point))
1700 (not (and transient-mark-mode mark-active
1701 (< (mark) (point)))))
1702 (goto-char isearch-other-end))
1703 (set query-replace-from-history-variable
1704 (cons isearch-string
1705 (symbol-value query-replace-from-history-variable)))
1706 (perform-replace
1707 isearch-string
1708 (query-replace-read-to
1709 isearch-string
1710 (concat "Query replace"
1711 (if (or delimited isearch-word)
1712 (let* ((symbol (or delimited isearch-word))
1713 (string (and symbol (symbolp symbol)
1714 (get symbol 'isearch-message-prefix))))
1715 (if (stringp string)
1716 ;; Move space from the end to the beginning.
1718 " word"))
1719 "")
1720 (if isearch-regexp " regexp" "")
1721 (if (and transient-mark-mode mark-active) " in region" ""))
1722 isearch-regexp)
1723 t isearch-regexp (or delimited isearch-word) nil nil
1724 (if (and transient-mark-mode mark-active) (region-beginning))
1725 (if (and transient-mark-mode mark-active) (region-end))))
1726 (and isearch-recursive-edit (exit-recursive-edit)))
1728 (defun isearch-query-replace-regexp (&optional delimited)
1729 "Start `query-replace-regexp' with string to replace from last search string.
1730 See `isearch-query-replace' for more information."
1731 (interactive
1732 (list current-prefix-arg))
1733 (isearch-query-replace delimited t))
1735 (defun isearch-occur (regexp &optional nlines)
1736 "Run `occur' using the last search string as the regexp.
1737 Interactively, REGEXP is constructed using the search string from the
1738 last search command. NLINES has the same meaning as in `occur'.
1740 If the last search command was a word search, REGEXP is computed from
1741 the search words, ignoring punctuation. If the last search
1742 command was a regular expression search, REGEXP is the regular
1743 expression used in that search. If the last search command searched
1744 for a literal string, REGEXP is constructed by quoting all the special
1745 characters in that string."
1746 (interactive
1747 (let* ((perform-collect (consp current-prefix-arg))
1748 (regexp (cond
1749 ((functionp isearch-word)
1750 (funcall isearch-word isearch-string))
1751 (isearch-word (word-search-regexp isearch-string))
1752 (isearch-regexp isearch-string)
1753 (t (regexp-quote isearch-string)))))
1754 (list regexp
1755 (if perform-collect
1756 ;; Perform collect operation
1757 (if (zerop (regexp-opt-depth regexp))
1758 ;; No subexpression so collect the entire match.
1760 ;; Get the regexp for collection pattern.
1761 (let ((default (car occur-collect-regexp-history))
1762 regexp-collect)
1763 (with-isearch-suspended
1764 (setq regexp-collect
1765 (read-regexp
1766 (format "Regexp to collect (default %s): " default)
1767 default 'occur-collect-regexp-history)))
1768 regexp-collect))
1769 ;; Otherwise normal occur takes numerical prefix argument.
1770 (when current-prefix-arg
1771 (prefix-numeric-value current-prefix-arg))))))
1772 (let ((case-fold-search isearch-case-fold-search)
1773 ;; Set `search-upper-case' to nil to not call
1774 ;; `isearch-no-upper-case-p' in `occur-1'.
1775 (search-upper-case nil)
1776 (search-spaces-regexp
1777 (if (if isearch-regexp
1778 isearch-regexp-lax-whitespace
1779 isearch-lax-whitespace)
1780 search-whitespace-regexp)))
1781 (occur regexp nlines)))
1783 (declare-function hi-lock-read-face-name "hi-lock" ())
1785 (defun isearch-highlight-regexp ()
1786 "Run `highlight-regexp' with regexp from the current search string.
1787 It exits Isearch mode and calls `hi-lock-face-buffer' with its regexp
1788 argument from the last search regexp or a quoted search string,
1789 and reads its face argument using `hi-lock-read-face-name'."
1790 (interactive)
1791 (let (
1792 ;; Set `isearch-recursive-edit' to nil to prevent calling
1793 ;; `exit-recursive-edit' in `isearch-done' that terminates
1794 ;; the execution of this command when it is non-nil.
1795 ;; We call `exit-recursive-edit' explicitly at the end below.
1796 (isearch-recursive-edit nil))
1797 (isearch-done nil t)
1798 (isearch-clean-overlays))
1799 (require 'hi-lock nil t)
1800 (let ((regexp (cond ((functionp isearch-word)
1801 (funcall isearch-word isearch-string))
1802 (isearch-word (word-search-regexp isearch-string))
1803 (isearch-regexp isearch-string)
1804 ((if (and (eq isearch-case-fold-search t)
1805 search-upper-case)
1806 (isearch-no-upper-case-p
1807 isearch-string isearch-regexp)
1808 isearch-case-fold-search)
1809 ;; Turn isearch-string into a case-insensitive
1810 ;; regexp.
1811 (mapconcat
1812 (lambda (c)
1813 (let ((s (string c)))
1814 (if (string-match "[[:alpha:]]" s)
1815 (format "[%s%s]" (upcase s) (downcase s))
1816 (regexp-quote s))))
1817 isearch-string ""))
1818 (t (regexp-quote isearch-string)))))
1819 (hi-lock-face-buffer regexp (hi-lock-read-face-name)))
1820 (and isearch-recursive-edit (exit-recursive-edit)))
1822 \f
1823 (defun isearch-delete-char ()
1824 "Discard last input item and move point back.
1825 Last input means the last character or the last isearch command
1826 that added or deleted characters from the search string,
1827 moved point, toggled regexp mode or case-sensitivity, etc.
1828 If no previous match was done, just beep."
1829 (interactive)
1830 (if (null (cdr isearch-cmds))
1831 (ding)
1832 (isearch-pop-state))
1833 (isearch-update))
1835 (defun isearch-del-char (&optional arg)
1836 "Delete character from end of search string and search again.
1837 Unlike `isearch-delete-char', it only deletes the last character,
1838 but doesn't cancel the effect of other isearch command.
1839 If search string is empty, just beep."
1840 (interactive "p")
1841 (if (= 0 (length isearch-string))
1842 (ding)
1843 (setq isearch-string (substring isearch-string 0
1844 (- (min (or arg 1)
1845 (length isearch-string))))
1846 isearch-message (mapconcat 'isearch-text-char-description
1847 isearch-string "")))
1848 ;; Use the isearch-other-end as new starting point to be able
1849 ;; to find the remaining part of the search string again.
1850 ;; This is like what `isearch-search-and-update' does,
1851 ;; but currently it doesn't support deletion of characters
1852 ;; for the case where unsuccessful search may become successful
1853 ;; by deletion of characters.
1854 (if isearch-other-end (goto-char isearch-other-end))
1855 (isearch-search)
1856 (isearch-push-state)
1857 (isearch-update))
1859 (defun isearch-yank-string (string)
1860 "Pull STRING into search string."
1861 ;; Downcase the string if not supposed to case-fold yanked strings.
1862 (if (and isearch-case-fold-search
1863 (eq 'not-yanks search-upper-case))
1864 (setq string (downcase string)))
1865 (if isearch-regexp (setq string (regexp-quote string)))
1866 ;; Don't move cursor in reverse search.
1867 (setq isearch-yank-flag t)
1868 (isearch-process-search-string
1869 string (mapconcat 'isearch-text-char-description string "")))
1871 (defun isearch-yank-kill ()
1872 "Pull string from kill ring into search string."
1873 (interactive)
1874 (isearch-yank-string (current-kill 0)))
1876 (defun isearch-yank-pop ()
1877 "Replace just-yanked search string with previously killed string."
1878 (interactive)
1879 (if (not (memq last-command '(isearch-yank-kill isearch-yank-pop)))
1880 ;; Fall back on `isearch-yank-kill' for the benefits of people
1881 ;; who are used to the old behavior of `M-y' in isearch mode. In
1882 ;; future, this fallback may be changed if we ever change
1883 ;; `yank-pop' to do something like the kill-ring-browser.
1884 (isearch-yank-kill)
1885 (isearch-pop-state)
1886 (isearch-yank-string (current-kill 1))))
1888 (defun isearch-yank-x-selection ()
1889 "Pull current X selection into search string."
1890 (interactive)
1891 (isearch-yank-string (x-get-selection))
1892 ;; If `x-get-selection' returned the text from the active region,
1893 ;; then it "used" the mark which we should hence deactivate.
1894 (when select-active-regions (deactivate-mark)))
1897 (defun isearch-mouse-2 (click)
1898 "Handle mouse-2 in Isearch mode.
1899 For a click in the echo area, invoke `isearch-yank-x-selection'.
1900 Otherwise invoke whatever the calling mouse-2 command sequence
1901 is bound to outside of Isearch."
1902 (interactive "e")
1903 (let* ((w (posn-window (event-start click)))
1904 (overriding-terminal-local-map nil)
1905 (binding (key-binding (this-command-keys-vector) t)))
1906 (if (and (window-minibuffer-p w)
1907 (not (minibuffer-window-active-p w))) ; in echo area
1908 (isearch-yank-x-selection)
1909 (when (functionp binding)
1910 (call-interactively binding)))))
1912 (defun isearch-yank-internal (jumpform)
1913 "Pull the text from point to the point reached by JUMPFORM.
1914 JUMPFORM is a lambda expression that takes no arguments and returns
1915 a buffer position, possibly having moved point to that position.
1916 For example, it might move point forward by a word and return point,
1917 or it might return the position of the end of the line."
1918 (isearch-yank-string
1919 (save-excursion
1920 (and (not isearch-forward) isearch-other-end
1921 (goto-char isearch-other-end))
1922 (buffer-substring-no-properties (point) (funcall jumpform)))))
1924 (defun isearch-yank-char-in-minibuffer (&optional arg)
1925 "Pull next character from buffer into end of search string in minibuffer."
1926 (interactive "p")
1927 (if (eobp)
1928 (insert
1929 (with-current-buffer (cadr (buffer-list))
1930 (buffer-substring-no-properties
1931 (point) (progn (forward-char arg) (point)))))
1932 (forward-char arg)))
1934 (defun isearch-yank-char (&optional arg)
1935 "Pull next character from buffer into search string."
1936 (interactive "p")
1937 (isearch-yank-internal (lambda () (forward-char arg) (point))))
1939 (declare-function subword-forward "subword" (&optional arg))
1940 (defun isearch-yank-word-or-char ()
1941 "Pull next character, subword or word from buffer into search string.
1942 Subword is used when `subword-mode' is activated. "
1943 (interactive)
1944 (isearch-yank-internal
1945 (lambda ()
1946 (if (or (= (char-syntax (or (char-after) 0)) ?w)
1947 (= (char-syntax (or (char-after (1+ (point))) 0)) ?w))
1948 (if (and (boundp 'subword-mode) subword-mode)
1949 (subword-forward 1)
1950 (forward-word 1))
1951 (forward-char 1)) (point))))
1953 (defun isearch-yank-word (&optional arg)
1954 "Pull next word from buffer into search string."
1955 (interactive "p")
1956 (isearch-yank-internal (lambda () (forward-word arg) (point))))
1958 (defun isearch-yank-line (&optional arg)
1959 "Pull rest of line from buffer into search string."
1960 (interactive "p")
1961 (isearch-yank-internal
1962 (lambda () (let ((inhibit-field-text-motion t))
1963 (line-end-position (if (eolp) (1+ arg) arg))))))
1965 (defun isearch-char-by-name (&optional count)
1966 "Read a character by its Unicode name and add it to the search string.
1967 Completion is available like in `read-char-by-name' used by `insert-char'.
1968 With argument, add COUNT copies of the character."
1969 (interactive "p")
1970 (with-isearch-suspended
1971 (let ((char (read-char-by-name "Add character to search (Unicode name or hex): ")))
1972 (when char
1973 (let ((string (if (and (integerp count) (> count 1))
1974 (make-string count char)
1975 (char-to-string char))))
1976 (setq isearch-new-string (concat isearch-string string)
1977 isearch-new-message (concat isearch-message
1978 (mapconcat 'isearch-text-char-description
1979 string ""))))))))
1981 (defun isearch-search-and-update ()
1982 ;; Do the search and update the display.
1983 (when (or isearch-success
1984 ;; Unsuccessful regexp search may become successful by
1985 ;; addition of characters which make isearch-string valid
1986 isearch-regexp
1987 ;; If the string was found but was completely invisible,
1988 ;; it might now be partly visible, so try again.
1989 (prog1 isearch-hidden (setq isearch-hidden nil)))
1990 ;; In reverse search, adding stuff at
1991 ;; the end may cause zero or many more chars to be
1992 ;; matched, in the string following point.
1993 ;; Allow all those possibilities without moving point as
1994 ;; long as the match does not extend past search origin.
1995 (if (and (not isearch-forward) (not isearch-adjusted)
1996 (condition-case ()
1997 (let ((case-fold-search isearch-case-fold-search))
1998 (if (and (eq case-fold-search t) search-upper-case)
1999 (setq case-fold-search
2000 (isearch-no-upper-case-p isearch-string isearch-regexp)))
2001 (looking-at (cond
2002 ((functionp isearch-word)
2003 (funcall isearch-word isearch-string t))
2004 (isearch-word (word-search-regexp isearch-string t))
2005 (isearch-regexp isearch-string)
2006 (t (regexp-quote isearch-string)))))
2007 (error nil))
2008 (or isearch-yank-flag
2009 (<= (match-end 0)
2010 (min isearch-opoint isearch-barrier))))
2011 (progn
2012 (setq isearch-success t
2013 isearch-error nil
2014 isearch-other-end (match-end 0))
2015 (if (and (eq isearch-case-fold-search t) search-upper-case)
2016 (setq isearch-case-fold-search
2017 (isearch-no-upper-case-p isearch-string isearch-regexp))))
2018 ;; Not regexp, not reverse, or no match at point.
2019 (if (and isearch-other-end (not isearch-adjusted))
2020 (goto-char (if isearch-forward isearch-other-end
2021 (min isearch-opoint
2022 isearch-barrier
2023 (1+ isearch-other-end)))))
2024 (isearch-search)
2025 ))
2026 (isearch-push-state)
2027 (if isearch-op-fun (funcall isearch-op-fun))
2028 (isearch-update))
2031 ;; *, ?, }, and | chars can make a regexp more liberal.
2032 ;; They can make a regexp match sooner or make it succeed instead of failing.
2033 ;; So go back to place last successful search started
2034 ;; or to the last ^S/^R (barrier), whichever is nearer.
2035 ;; + needs no special handling because the string must match at least once.
2037 (defun isearch-backslash (str)
2038 "Return t if STR ends in an odd number of backslashes."
2041 (defun isearch-fallback (want-backslash &optional allow-invalid to-barrier)
2042 "Return point to previous successful match to allow regexp liberalization.
2045 stopping at `isearch-barrier' as needed.
2047 Do nothing if a backslash is escaping the liberalizing character.
2050 Do nothing if regexp has recently been invalid unless optional
2051 ALLOW-INVALID non-nil.
2053 If optional TO-BARRIER non-nil, ignore previous matches and go exactly
2054 to the barrier."
2055 ;; (eq (not a) (not b)) makes all non-nil values equivalent
2056 (when (and isearch-regexp (eq (not (isearch-backslash isearch-string))
2057 (not want-backslash))
2058 ;; We have to check 2 stack frames because the last might be
2059 ;; invalid just because of a backslash.
2060 (or (not isearch-error)
2061 (not (isearch--state-error (cadr isearch-cmds)))
2062 allow-invalid))
2063 (if to-barrier
2064 (progn (goto-char isearch-barrier)
2065 (setq isearch-adjusted t))
2066 (let* ((stack isearch-cmds)
2067 (previous (cdr stack)) ; lookbelow in the stack
2068 (frame (car stack)))
2069 ;; Walk down the stack looking for a valid regexp (as of course only
2070 ;; they can be the previous successful match); this conveniently
2071 ;; removes all bracket-sets and groups that might be in the way, as
2072 ;; well as partial \{\} constructs that the code below leaves behind.
2073 ;; Also skip over postfix operators -- though horrid,
2074 ;; 'ab?\{5,6\}+\{1,2\}*' is perfectly valid.
2075 (while (and previous
2076 (or (isearch--state-error frame)
2077 (let* ((string (isearch--state-string frame))
2078 (lchar (aref string (1- (length string)))))
2079 ;; The operators aren't always operators; check
2080 ;; backslashes. This doesn't handle the case of
2081 ;; operators at the beginning of the regexp not
2082 ;; being special, but then we should fall back to
2083 ;; the barrier anyway because it's all optional.
2084 (if (isearch-backslash
2085 (isearch--state-string (car previous)))
2086 (eq lchar ?\})
2087 (memq lchar '(?* ?? ?+))))))
2088 (setq stack previous previous (cdr previous) frame (car stack)))
2089 (when stack
2090 ;; `stack' now refers the most recent valid regexp that is not at
2091 ;; all optional in its last term. Now dig one level deeper and find
2092 ;; what matched before that.
2093 (let ((last-other-end
2094 (or (and (car previous)
2095 (isearch--state-other-end (car previous)))
2096 isearch-barrier)))
2097 (goto-char (if isearch-forward
2098 (max last-other-end isearch-barrier)
2099 (min last-other-end isearch-barrier)))
2100 (setq isearch-adjusted t)))))))
2102 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
2103 ;; scrolling within Isearch mode. Alan Mackenzie (acm@muc.de), 2003/2/24
2104 ;;
2105 ;; The idea here is that certain vertical scrolling commands (like C-l
2106 ;; `recenter') should be usable WITHIN Isearch mode. For a command to be
2107 ;; suitable, it must NOT alter the buffer, swap to another buffer or frame,
2108 ;; tamper with isearch's state, or move point. It is unacceptable for the
2109 ;; search string to be scrolled out of the current window. If a command
2110 ;; attempts this, we scroll the text back again.
2111 ;;
2112 ;; We implement this feature with a property called `isearch-scroll'.
2113 ;; If a command's symbol has the value t for this property or for the
2114 ;; `scroll-command' property, it is a scrolling command. The feature
2115 ;; needs to be enabled by setting the customizable variable
2116 ;; `isearch-allow-scroll' to a non-nil value.
2117 ;;
2118 ;; The universal argument commands (e.g. C-u) in simple.el are marked
2119 ;; as scrolling commands, and isearch.el has been amended to allow
2120 ;; prefix arguments to be passed through to scrolling commands. Thus
2121 ;; M-0 C-l will scroll point to the top of the window.
2122 ;;
2123 ;; Horizontal scrolling commands are currently not catered for.
2124 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
2126 ;; Set the isearch-scroll property on some standard functions:
2127 ;; Scroll-bar functions:
2128 (if (fboundp 'scroll-bar-toolkit-scroll)
2129 (put 'scroll-bar-toolkit-scroll 'isearch-scroll t))
2130 (if (fboundp 'w32-handle-scroll-bar-event)
2131 (put 'w32-handle-scroll-bar-event 'isearch-scroll t))
2133 ;; Commands which scroll the window (some scroll commands
2134 ;; already have the `scroll-command' property on them):
2135 (put 'recenter 'isearch-scroll t)
2136 (put 'recenter-top-bottom 'isearch-scroll t)
2137 (put 'reposition-window 'isearch-scroll t)
2139 ;; Commands which act on the other window
2140 (put 'list-buffers 'isearch-scroll t)
2141 (put 'scroll-other-window 'isearch-scroll t)
2142 (put 'scroll-other-window-down 'isearch-scroll t)
2143 (put 'beginning-of-buffer-other-window 'isearch-scroll t)
2144 (put 'end-of-buffer-other-window 'isearch-scroll t)
2146 ;; Commands which change the window layout
2147 (put 'delete-other-windows 'isearch-scroll t)
2148 (put 'balance-windows 'isearch-scroll t)
2149 (put 'split-window-right 'isearch-scroll t)
2150 (put 'split-window-below 'isearch-scroll t)
2151 (put 'enlarge-window 'isearch-scroll t)
2153 ;; Aliases for split-window-*
2154 (put 'split-window-vertically 'isearch-scroll t)
2155 (put 'split-window-horizontally 'isearch-scroll t)
2157 ;; Universal argument commands
2158 (put 'universal-argument 'isearch-scroll t)
2159 (put 'negative-argument 'isearch-scroll t)
2160 (put 'digit-argument 'isearch-scroll t)
2162 (defcustom isearch-allow-scroll nil
2163 "Whether scrolling is allowed during incremental search.
2164 If non-nil, scrolling commands can be used in Isearch mode.
2165 However, the current match will never scroll offscreen.
2166 If nil, scrolling commands will first cancel Isearch mode."
2167 :type 'boolean
2168 :group 'isearch)
2170 (defcustom isearch-allow-prefix t
2171 "Whether prefix arguments are allowed during incremental search.
2172 If non-nil, entering a prefix argument will not terminate the
2173 search. This option is ignored \(presumed t) when
2174 `isearch-allow-scroll' is set."
2175 :version "24.4"
2176 :type 'boolean
2177 :group 'isearch)
2179 (defun isearch-string-out-of-window (isearch-point)
2180 "Test whether the search string is currently outside of the window.
2181 Return nil if it's completely visible, or if point is visible,
2182 together with as much of the search string as will fit; the symbol
2183 `above' if we need to scroll the text downwards; the symbol `below',
2184 if upwards."
2185 (let ((w-start (window-start))
2186 (w-end (window-end nil t))
2187 (w-L1 (save-excursion (move-to-window-line 1) (point)))
2188 (w-L-1 (save-excursion (move-to-window-line -1) (point)))
2189 start end) ; start and end of search string in buffer
2190 (if isearch-forward
2191 (setq end isearch-point start (or isearch-other-end isearch-point))
2192 (setq start isearch-point end (or isearch-other-end isearch-point)))
2193 (cond ((or (and (>= start w-start) (<= end w-end))
2194 (if isearch-forward
2195 (and (>= isearch-point w-L-1) (< isearch-point w-end)) ; point on Line -1
2196 (and (>= isearch-point w-start) (< isearch-point w-L1)))) ; point on Line 0
2197 nil)
2198 ((and (< start w-start)
2199 (< isearch-point w-L-1))
2200 'above)
2201 (t 'below))))
2203 (defun isearch-back-into-window (above isearch-point)
2204 "Scroll the window to bring the search string back into view.
2205 Restore point to ISEARCH-POINT in the process. ABOVE is t when the
2206 search string is above the top of the window, nil when it is beneath
2207 the bottom."
2208 (let (start end)
2209 (if isearch-forward
2210 (setq end isearch-point start (or isearch-other-end isearch-point))
2211 (setq start isearch-point end (or isearch-other-end isearch-point)))
2212 (if above
2213 (progn
2214 (goto-char start)
2215 (recenter 0)
2216 (when (>= isearch-point (window-end nil t))
2217 (goto-char isearch-point)
2218 (recenter -1)))
2219 (goto-char end)
2220 (recenter -1)
2221 (when (< isearch-point (window-start))
2222 (goto-char isearch-point)
2223 (recenter 0))))
2224 (goto-char isearch-point))
2226 (defvar isearch-pre-scroll-point nil)
2228 (defun isearch-pre-command-hook ()
2229 "Decide whether to exit Isearch mode before executing the command.
2230 Don't exit Isearch if the key sequence that invoked this command
2231 is bound in `isearch-mode-map', or if the invoked command is
2232 a prefix argument command (when `isearch-allow-prefix' is non-nil),
2233 or it is a scrolling command (when `isearch-allow-scroll' is non-nil).
2234 Otherwise, exit Isearch (when `search-exit-option' is non-nil)
2235 before the command is executed globally with terminated Isearch."
2236 (let* ((key (this-single-command-keys))
2237 (main-event (aref key 0)))
2238 (cond
2239 ;; Don't exit Isearch if we're in the middle of some
2240 ;; set-temporary-overlay-map thingy like universal-argument--mode.
2241 ((not (eq overriding-terminal-local-map isearch--saved-overriding-local-map)))
2242 ;; Don't exit Isearch for isearch key bindings.
2243 ((commandp (lookup-key isearch-mode-map key nil)))
2244 ;; Optionally edit the search string instead of exiting.
2245 ((eq search-exit-option 'edit)
2246 (setq this-command 'isearch-edit-string))
2247 ;; Handle a scrolling function or prefix argument.
2248 ((or (and isearch-allow-prefix
2249 (memq this-command '(universal-argument
2250 digit-argument negative-argument)))
2251 (and isearch-allow-scroll
2252 (symbolp this-command)
2253 (or (eq (get this-command 'isearch-scroll) t)
2254 (eq (get this-command 'scroll-command) t))))
2255 (when isearch-allow-scroll
2256 (setq isearch-pre-scroll-point (point))))
2257 ;; A mouse click on the isearch message starts editing the search string.
2258 ((and (eq (car-safe main-event) 'down-mouse-1)
2259 (window-minibuffer-p (posn-window (event-start main-event))))
2260 ;; Swallow the up-event.
2261 (read-event)
2262 (setq this-command 'isearch-edit-string))
2263 ;; Other characters terminate the search and are then executed normally.
2264 (search-exit-option
2265 (isearch-done)
2266 (isearch-clean-overlays))
2267 ;; If search-exit-option is nil, run the command without exiting Isearch.
2268 (t
2269 (isearch-process-search-string key key)))))
2271 (defun isearch-post-command-hook ()
2272 (when isearch-pre-scroll-point
2273 (let ((ab-bel (isearch-string-out-of-window isearch-pre-scroll-point)))
2274 (if ab-bel
2275 (isearch-back-into-window (eq ab-bel 'above) isearch-pre-scroll-point)
2276 (goto-char isearch-pre-scroll-point)))
2277 (setq isearch-pre-scroll-point nil)
2278 (isearch-update)))
2280 (defun isearch-quote-char (&optional count)
2281 "Quote special characters for incremental search.
2282 With argument, add COUNT copies of the character."
2283 (interactive "p")
2284 (let ((char (read-quoted-char (isearch-message t))))
2285 ;; Assume character codes 0200 - 0377 stand for characters in some
2286 ;; single-byte character set, and convert them to Emacs
2287 ;; characters.
2288 (if (and isearch-regexp isearch-regexp-lax-whitespace (= char ?\s))
2289 (if (subregexp-context-p isearch-string (length isearch-string))
2290 (isearch-process-search-string "[ ]" " ")
2291 (isearch-process-search-char char count))
2292 ;; This used to assume character codes 0240 - 0377 stand for
2293 ;; characters in some single-byte character set, and converted them
2294 ;; to Emacs characters. But in 23.1 this feature is deprecated
2295 ;; in favor of inserting the corresponding Unicode characters.
2296 ;; (and enable-multibyte-characters
2299 ;; (setq char (unibyte-char-to-multibyte char)))
2300 (isearch-process-search-char char count))))
2302 (defun isearch-printing-char (&optional char count)
2303 "Add this ordinary printing CHAR to the search string and search.
2304 With argument, add COUNT copies of the character."
2305 (interactive (list last-command-event
2306 (prefix-numeric-value current-prefix-arg)))
2307 (let ((char (or char last-command-event)))
2308 (if (= char ?\S-\ )
2309 (setq char ?\s))
2310 (if current-input-method
2311 (isearch-process-search-multibyte-characters char count)
2312 (isearch-process-search-char char count))))
2314 (defun isearch-process-search-char (char &optional count)
2315 ;; * and ? are special in regexps when not preceded by \.
2316 ;; } and | are special in regexps when preceded by \.
2317 ;; Nothing special for + because it matches at least once.
2318 (cond
2319 ((memq char '(?* ??)) (isearch-fallback nil))
2320 ((eq char ?\}) (isearch-fallback t t))
2321 ((eq char ?|) (isearch-fallback t nil t)))
2323 ;; Append the char(s) to the search string,
2324 ;; update the message and re-search.
2325 (let* ((string (if (and (integerp count) (> count 1))
2326 (make-string count char)
2327 (char-to-string char)))
2329 string
2330 (mapconcat 'isearch-text-char-description string ""))))
2331 (isearch-process-search-string string message)))
2333 (defun isearch-process-search-string (string message)
2334 (setq isearch-string (concat isearch-string string)
2335 isearch-message (concat isearch-message message))
2336 (isearch-search-and-update))
2338 \f
2339 ;; Search Ring
2341 (defun isearch-ring-adjust1 (advance)
2342 ;; Helper for isearch-ring-adjust
2343 (let* ((ring (if isearch-regexp regexp-search-ring search-ring))
2344 (length (length ring))
2345 (yank-pointer-name (if isearch-regexp
2346 'regexp-search-ring-yank-pointer
2347 'search-ring-yank-pointer))
2348 (yank-pointer (eval yank-pointer-name)))
2349 (if (zerop length)
2350 ()
2351 (set yank-pointer-name
2352 (setq yank-pointer
2353 (mod (+ (or yank-pointer (if advance 0 -1))
2354 (if advance -1 1))
2355 length)))
2356 (setq isearch-string (nth yank-pointer ring)
2357 isearch-message (mapconcat 'isearch-text-char-description
2358 isearch-string "")))))
2360 (defun isearch-ring-adjust (advance)
2361 ;; Helper for isearch-ring-advance and isearch-ring-retreat
2362 (isearch-ring-adjust1 advance)
2363 (if search-ring-update
2364 (progn
2365 (isearch-search)
2366 (isearch-push-state)
2367 (isearch-update))
2368 ;; Otherwise, edit the search string instead. Note that there is
2369 ;; no need to push the search state after isearch-edit-string here
2370 ;; since isearch-edit-string already pushes its state
2371 (isearch-edit-string)))
2373 (defun isearch-ring-advance ()
2374 "Advance to the next search string in the ring."
2375 ;; This could be more general to handle a prefix arg, but who would use it.
2376 (interactive)
2377 (isearch-ring-adjust 'advance))
2379 (defun isearch-ring-retreat ()
2380 "Retreat to the previous search string in the ring."
2381 (interactive)
2382 (isearch-ring-adjust nil))
2384 (defun isearch-complete1 ()
2385 ;; Helper for isearch-complete and isearch-complete-edit
2386 ;; Return t if completion OK, nil if no completion exists.
2387 (let* ((ring (if isearch-regexp regexp-search-ring search-ring))
2388 (completion-ignore-case case-fold-search)
2389 (completion (try-completion isearch-string ring)))
2390 (cond
2391 ((eq completion t)
2392 ;; isearch-string stays the same
2393 t)
2394 ((or completion ; not nil, must be a string
2395 (= 0 (length isearch-string))) ; shouldn't have to say this
2396 (if (equal completion isearch-string) ;; no extension?
2397 (progn
2398 (if completion-auto-help
2399 (with-output-to-temp-buffer "*Isearch completions*"
2400 (display-completion-list
2401 (all-completions isearch-string ring))))
2402 t)
2403 (and completion
2404 (setq isearch-string completion))))
2405 (t
2406 (message "No completion") ; waits a second if in minibuffer
2407 nil))))
2409 (defun isearch-complete ()
2410 "Complete the search string from the strings on the search ring.
2411 The completed string is then editable in the minibuffer.
2412 If there is no completion possible, say so and continue searching."
2413 (interactive)
2414 (if (isearch-complete1)
2415 (progn (setq isearch-message
2416 (mapconcat 'isearch-text-char-description
2417 isearch-string ""))
2418 (isearch-edit-string))
2419 ;; else
2420 (sit-for 1)
2421 (isearch-update)))
2423 (defun isearch-complete-edit ()
2424 "Same as `isearch-complete' except in the minibuffer."
2425 (interactive)
2426 (setq isearch-string (field-string))
2427 (if (isearch-complete1)
2428 (progn
2429 (delete-field)
2430 (insert isearch-string))))
2432 \f
2433 ;; Message string
2435 (defun isearch-message (&optional c-q-hack ellipsis)
2436 ;; Generate and print the message string.
2437 (let ((cursor-in-echo-area ellipsis)
2438 (m isearch-message)
2439 (fail-pos (isearch-fail-pos t)))
2440 ;; Highlight failed part
2441 (when fail-pos
2442 (setq m (copy-sequence m))
2443 (add-text-properties fail-pos (length m) '(face isearch-fail) m)
2444 ;; Highlight failed trailing whitespace
2445 (when (string-match " +$" m)
2446 (add-text-properties (match-beginning 0) (match-end 0)
2447 '(face trailing-whitespace) m)))
2448 (setq m (concat
2449 (isearch-message-prefix ellipsis isearch-nonincremental)
2450 m
2451 (isearch-message-suffix c-q-hack)))
2452 (if c-q-hack m (let ((message-log-max nil)) (message "%s" m)))))
2454 (defun isearch-message-prefix (&optional ellipsis nonincremental)
2455 ;; If about to search, and previous search regexp was invalid,
2456 ;; check that it still is. If it is valid now,
2457 ;; let the message we display while searching say that it is valid.
2458 (and isearch-error ellipsis
2459 (condition-case ()
2460 (progn (re-search-forward isearch-string (point) t)
2461 (setq isearch-error nil))
2462 (error nil)))
2463 ;; If currently failing, display no ellipsis.
2464 (or isearch-success (setq ellipsis nil))
2465 (let ((m (concat (if isearch-success "" "failing ")
2466 (if isearch-adjusted "pending " "")
2467 (if (and isearch-wrapped
2468 (not isearch-wrap-function)
2469 (if isearch-forward
2470 (> (point) isearch-opoint)
2471 (< (point) isearch-opoint)))
2472 "over")
2473 (if isearch-wrapped "wrapped ")
2474 (let ((prefix ""))
2475 (advice-function-mapc
2476 (lambda (_ props)
2477 (let ((np (cdr (assq 'isearch-message-prefix props))))
2478 (if np (setq prefix (concat np prefix)))))
2479 isearch-filter-predicate)
2480 prefix)
2481 (if isearch-word
2482 (or (and (symbolp isearch-word)
2483 (get isearch-word 'isearch-message-prefix))
2484 "word ")
2485 "")
2486 (if isearch-regexp "regexp " "")
2487 (if multi-isearch-next-buffer-current-function "multi " "")
2488 (or isearch-message-prefix-add "")
2489 (if nonincremental "search" "I-search")
2490 (if isearch-forward "" " backward")
2491 (if current-input-method
2492 ;; Input methods for RTL languages use RTL
2493 ;; characters for their title, and that messes
2494 ;; up the display of search text after the prompt.
2495 (bidi-string-mark-left-to-right
2496 (concat " [" current-input-method-title "]: "))
2497 ": ")
2498 )))
2499 (propertize (concat (upcase (substring m 0 1)) (substring m 1))
2500 'face 'minibuffer-prompt)))
2502 (defun isearch-message-suffix (&optional c-q-hack)
2503 (concat (if c-q-hack "^Q" "")
2504 (if isearch-error
2505 (concat " [" isearch-error "]")
2506 "")
2507 (or isearch-message-suffix-add "")))
2509 \f
2510 ;; Searching
2512 (defvar isearch-search-fun-function 'isearch-search-fun-default
2513 "Non-default value overrides the behavior of `isearch-search-fun-default'.
2514 This variable's value should be a function, which will be called
2515 with no arguments, and should return a function that takes three
2516 arguments: STRING, BOUND, and NOERROR.
2518 This returned function will be used by `isearch-search-string' to
2519 search for the first occurrence of STRING or its translation.")
2521 (defun isearch-search-fun ()
2522 "Return the function to use for the search.
2523 Can be changed via `isearch-search-fun-function' for special needs."
2524 (funcall (or isearch-search-fun-function 'isearch-search-fun-default)))
2526 (defun isearch-search-fun-default ()
2527 "Return default functions to use for the search."
2528 (cond
2529 (isearch-word
2530 (lambda (string &optional bound noerror count)
2531 ;; Use lax versions to not fail at the end of the word while
2532 ;; the user adds and removes characters in the search string
2533 ;; (or when using nonincremental word isearch)
2534 (let ((lax (not (or isearch-nonincremental
2535 (null (car isearch-cmds))
2536 (eq (length isearch-string)
2537 (length (isearch--state-string
2538 (car isearch-cmds))))))))
2539 (funcall
2540 (if isearch-forward #'re-search-forward #'re-search-backward)
2541 (if (functionp isearch-word)
2542 (funcall isearch-word string lax)
2543 (word-search-regexp string lax))
2544 bound noerror count))))
2545 ((and isearch-regexp isearch-regexp-lax-whitespace
2546 search-whitespace-regexp)
2547 (if isearch-forward
2548 're-search-forward-lax-whitespace
2549 're-search-backward-lax-whitespace))
2550 (isearch-regexp
2551 (if isearch-forward 're-search-forward 're-search-backward))
2552 ((and isearch-lax-whitespace search-whitespace-regexp)
2553 (if isearch-forward
2554 'search-forward-lax-whitespace
2555 'search-backward-lax-whitespace))
2556 (t
2557 (if isearch-forward 'search-forward 'search-backward))))
2559 (defun isearch-search-string (string bound noerror)
2560 "Search for the first occurrence of STRING or its translation.
2561 If found, move point to the end of the occurrence,
2562 update the match data, and return point."
2563 (let* ((func (isearch-search-fun))
2564 (pos1 (save-excursion (funcall func string bound noerror)))
2565 pos2)
2566 (when (and
2567 ;; Avoid "obsolete" warnings for translation-table-for-input.
2568 (with-no-warnings
2569 (char-table-p translation-table-for-input))
2570 (multibyte-string-p string)
2571 ;; Minor optimization.
2572 (string-match-p "[^[:ascii:]]" string))
2573 (let ((translated
2574 (apply 'string
2575 (mapcar (lambda (c)
2576 (or
2577 ;; Avoid "obsolete" warnings for
2578 ;; translation-table-for-input.
2579 (with-no-warnings
2580 (aref translation-table-for-input c))
2581 c))
2582 string)))
2583 match-data)
2584 (when translated
2585 (save-match-data
2586 (save-excursion
2587 (if (setq pos2 (funcall func translated bound noerror))
2588 (setq match-data (match-data t)))))
2589 (when (and pos2
2590 (or (not pos1)
2591 (if isearch-forward (< pos2 pos1) (> pos2 pos1))))
2592 (setq pos1 pos2)
2593 (set-match-data match-data)))))
2594 (when pos1
2595 ;; When using multiple buffers isearch, switch to the new buffer here,
2596 ;; because `save-excursion' above doesn't allow doing it inside funcall.
2597 (if (and multi-isearch-next-buffer-current-function
2598 (buffer-live-p multi-isearch-current-buffer))
2599 (switch-to-buffer multi-isearch-current-buffer))
2600 (goto-char pos1)
2601 pos1)))
2603 (defun isearch-search ()
2604 ;; Do the search with the current search string.
2605 (if isearch-message-function
2606 (funcall isearch-message-function nil t)
2607 (isearch-message nil t))
2608 (if (and (eq isearch-case-fold-search t) search-upper-case)
2609 (setq isearch-case-fold-search
2610 (isearch-no-upper-case-p isearch-string isearch-regexp)))
2611 (condition-case lossage
2612 (let ((inhibit-point-motion-hooks isearch-invisible)
2613 (inhibit-quit nil)
2614 (case-fold-search isearch-case-fold-search)
2615 (search-invisible isearch-invisible)
2616 (retry t))
2617 (setq isearch-error nil)
2618 (while retry
2619 (setq isearch-success
2620 (isearch-search-string isearch-string nil t))
2621 ;; Clear RETRY unless the search predicate says
2622 ;; to skip this search hit.
2623 (if (or (not isearch-success)
2624 (bobp) (eobp)
2625 (= (match-beginning 0) (match-end 0))
2626 (funcall isearch-filter-predicate
2627 (match-beginning 0) (match-end 0)))
2628 (setq retry nil)))
2629 (setq isearch-just-started nil)
2630 (if isearch-success
2631 (setq isearch-other-end
2632 (if isearch-forward (match-beginning 0) (match-end 0)))))
2634 (quit (isearch-unread ?\C-g)
2635 (setq isearch-success nil))
2637 (invalid-regexp
2638 (setq isearch-error (car (cdr lossage)))
2639 (cond
2640 ((string-match
2642 isearch-error)
2643 (setq isearch-error "incomplete input"))
2644 ((and (not isearch-regexp)
2646 (cond
2647 (isearch-word
2648 (setq isearch-error "Too many words"))
2649 ((and isearch-lax-whitespace search-whitespace-regexp)
2650 (setq isearch-error "Too many spaces for whitespace matching"))))))
2652 (search-failed
2653 (setq isearch-success nil)
2654 (setq isearch-error (nth 2 lossage)))
2656 (error
2657 ;; stack overflow in regexp search.
2658 (setq isearch-error (format "%s" lossage))))
2660 (if isearch-success
2661 nil
2662 ;; Ding if failed this time after succeeding last time.
2663 (and (isearch--state-success (car isearch-cmds))
2664 (ding))
2665 (if (functionp (isearch--state-pop-fun (car isearch-cmds)))
2666 (funcall (isearch--state-pop-fun (car isearch-cmds))
2667 (car isearch-cmds)))
2668 (goto-char (isearch--state-point (car isearch-cmds)))))
2671 ;; Called when opening an overlay, and we are still in isearch.
2672 (defun isearch-open-overlay-temporary (ov)
2673 (if (not (null (overlay-get ov 'isearch-open-invisible-temporary)))
2674 ;; Some modes would want to open the overlays temporary during
2675 ;; isearch in their own way, they should set the
2676 ;; `isearch-open-invisible-temporary' to a function doing this.
2677 (funcall (overlay-get ov 'isearch-open-invisible-temporary) ov nil)
2678 ;; Store the values for the `invisible' and `intangible'
2679 ;; properties, and then set them to nil. This way the text hidden
2680 ;; by this overlay becomes visible.
2682 ;; Do we really need to set the `intangible' property to t? Can we
2683 ;; have the point inside an overlay with an `intangible' property?
2684 ;; In 19.34 this does not exist so I cannot test it.
2685 (overlay-put ov 'isearch-invisible (overlay-get ov 'invisible))
2686 (overlay-put ov 'isearch-intangible (overlay-get ov 'intangible))
2687 (overlay-put ov 'invisible nil)
2688 (overlay-put ov 'intangible nil)))
2691 ;; This is called at the end of isearch. It will open the overlays
2692 ;; that contain the latest match. Obviously in case of a C-g the
2693 ;; point returns to the original location which surely is not contain
2694 ;; in any of these overlays, se we are safe in this case too.
2695 (defun isearch-open-necessary-overlays (ov)
2696 (let ((inside-overlay (and (> (point) (overlay-start ov))
2697 (< (point) (overlay-end ov))))
2698 ;; If this exists it means that the overlay was opened using
2699 ;; this function, not by us tweaking the overlay properties.
2700 (fct-temp (overlay-get ov 'isearch-open-invisible-temporary)))
2701 (when (or inside-overlay (not fct-temp))
2702 ;; restore the values for the `invisible' and `intangible'
2703 ;; properties
2704 (overlay-put ov 'invisible (overlay-get ov 'isearch-invisible))
2705 (overlay-put ov 'intangible (overlay-get ov 'isearch-intangible))
2706 (overlay-put ov 'isearch-invisible nil)
2707 (overlay-put ov 'isearch-intangible nil))
2708 (if inside-overlay
2709 (funcall (overlay-get ov 'isearch-open-invisible) ov)
2710 (if fct-temp
2711 (funcall fct-temp ov t)))))
2713 ;; This is called when exiting isearch. It closes the temporary
2714 ;; opened overlays, except the ones that contain the latest match.
2715 (defun isearch-clean-overlays ()
2716 (when isearch-opened-overlays
2717 (mapc 'isearch-open-necessary-overlays isearch-opened-overlays)
2718 (setq isearch-opened-overlays nil)))
2721 (defun isearch-intersects-p (start0 end0 start1 end1)
2722 "Return t if regions START0..END0 and START1..END1 intersect."
2723 (or (and (>= start0 start1) (< start0 end1))
2724 (and (> end0 start1) (<= end0 end1))
2725 (and (>= start1 start0) (< start1 end0))
2726 (and (> end1 start0) (<= end1 end0))))
2729 ;; Verify if the current match is outside of each element of
2730 ;; `isearch-opened-overlays', if so close that overlay.
2732 (defun isearch-close-unnecessary-overlays (begin end)
2733 (let ((overlays isearch-opened-overlays))
2734 (setq isearch-opened-overlays nil)
2735 (dolist (ov overlays)
2736 (if (isearch-intersects-p begin end (overlay-start ov) (overlay-end ov))
2737 (push ov isearch-opened-overlays)
2738 (let ((fct-temp (overlay-get ov 'isearch-open-invisible-temporary)))
2739 (if fct-temp
2740 ;; If this exists it means that the overlay was opened
2741 ;; using this function, not by us tweaking the overlay
2742 ;; properties.
2743 (funcall fct-temp ov t)
2744 (overlay-put ov 'invisible (overlay-get ov 'isearch-invisible))
2745 (overlay-put ov 'intangible (overlay-get ov 'isearch-intangible))
2746 (overlay-put ov 'isearch-invisible nil)
2747 (overlay-put ov 'isearch-intangible nil)))))))
2750 (defun isearch-range-invisible (beg end)
2751 "Return t if all the text from BEG to END is invisible."
2752 (when (/= beg end)
2753 ;; Check that invisibility runs up to END.
2754 (save-excursion
2755 (goto-char beg)
2756 (let (;; can-be-opened keeps track if we can open some overlays.
2757 (can-be-opened (eq search-invisible 'open))
2758 ;; the list of overlays that could be opened
2759 (crt-overlays nil))
2760 (when (and can-be-opened isearch-hide-immediately)
2761 (isearch-close-unnecessary-overlays beg end))
2762 ;; If the following character is currently invisible,
2763 ;; skip all characters with that same `invisible' property value.
2764 ;; Do that over and over.
2765 (while (and (< (point) end) (invisible-p (point)))
2766 (if (invisible-p (get-text-property (point) 'invisible))
2767 (progn
2768 (goto-char (next-single-property-change (point) 'invisible
2769 nil end))
2770 ;; if text is hidden by an `invisible' text property
2771 ;; we cannot open it at all.
2772 (setq can-be-opened nil))
2773 (when can-be-opened
2774 (let ((overlays (overlays-at (point)))
2775 ov-list
2776 o
2777 invis-prop)
2778 (while overlays
2779 (setq o (car overlays)
2780 invis-prop (overlay-get o 'invisible))
2781 (if (invisible-p invis-prop)
2782 (if (overlay-get o 'isearch-open-invisible)
2783 (setq ov-list (cons o ov-list))
2784 ;; We found one overlay that cannot be
2785 ;; opened, that means the whole chunk
2786 ;; cannot be opened.
2787 (setq can-be-opened nil)))
2788 (setq overlays (cdr overlays)))
2789 (if can-be-opened
2790 ;; It makes sense to append to the open
2791 ;; overlays list only if we know that this is
2792 ;; t.
2793 (setq crt-overlays (append ov-list crt-overlays)))))
2794 (goto-char (next-overlay-change (point)))))
2795 ;; See if invisibility reaches up thru END.
2796 (if (>= (point) end)
2797 (if (and can-be-opened (consp crt-overlays))
2798 (progn
2799 (setq isearch-opened-overlays
2800 (append isearch-opened-overlays crt-overlays))
2801 (mapc 'isearch-open-overlay-temporary crt-overlays)
2802 nil)
2803 (setq isearch-hidden t)))))))
2805 (defun isearch-filter-visible (beg end)
2806 "Test whether the current search hit is visible at least partially.
2807 Return non-nil if the text from BEG to END is visible to Isearch as
2808 determined by `isearch-range-invisible' unless invisible text can be
2809 searched too when `search-invisible' is t."
2810 (or (eq search-invisible t)
2811 (not (isearch-range-invisible beg end))))
2813 \f
2814 ;; General utilities
2816 (defun isearch-no-upper-case-p (string regexp-flag)
2817 "Return t if there are no upper case chars in STRING.
2819 since they have special meaning in a regexp."
2820 (let (quote-flag (i 0) (len (length string)) found)
2821 (while (and (not found) (< i len))
2822 (let ((char (aref string i)))
2824 (setq quote-flag (not quote-flag))
2825 (if (and (not quote-flag) (not (eq char (downcase char))))
2826 (setq found t))
2827 (setq quote-flag nil)))
2828 (setq i (1+ i)))
2829 (not (or found
2830 ;; Even if there's no uppercase char, we want to detect the use
2831 ;; of [:upper:] or [:lower:] char-class, which indicates
2832 ;; clearly that the user cares about case distinction.
2834 (condition-case err
2835 (progn
2836 (string-match (substring string 0 (match-beginning 0))
2837 "")
2838 nil)
2839 (invalid-regexp
2840 (equal "Unmatched [ or [^" (cadr err)))))))))
2842 ;; Portability functions to support various Emacs versions.
2844 (defun isearch-text-char-description (c)
2845 (cond
2846 ((< c ?\s) (propertize (format "^%c" (+ c 64)) 'face 'escape-glyph))
2847 ((= c ?\^?) (propertize "^?" 'face 'escape-glyph))
2848 (t (char-to-string c))))
2850 ;; General function to unread characters or events.
2851 ;; Also insert them in a keyboard macro being defined.
2852 (defun isearch-unread (&rest char-or-events)
2853 (mapc 'store-kbd-macro-event char-or-events)
2854 (setq unread-command-events
2855 (append char-or-events unread-command-events)))
2857 \f
2858 ;; Highlighting
2860 (defvar isearch-overlay nil)
2862 (defun isearch-highlight (beg end)
2863 (if search-highlight
2864 (if isearch-overlay
2865 ;; Overlay already exists, just move it.
2866 (move-overlay isearch-overlay beg end (current-buffer))
2867 ;; Overlay doesn't exist, create it.
2868 (setq isearch-overlay (make-overlay beg end))
2869 ;; 1001 is higher than lazy's 1000 and ediff's 100+
2870 (overlay-put isearch-overlay 'priority 1001)
2871 (overlay-put isearch-overlay 'face isearch-face))))
2873 (defun isearch-dehighlight ()
2874 (when isearch-overlay
2875 (delete-overlay isearch-overlay)))
2876 \f
2877 ;; isearch-lazy-highlight feature
2878 ;; by Bob Glickstein <http://www.zanshin.com/~bobg/>
2880 ;; When active, *every* match for the current search string is
2881 ;; highlighted: the current one using the normal isearch match color
2882 ;; and all the others using `isearch-lazy-highlight'. The extra
2883 ;; highlighting makes it easier to anticipate where the cursor will
2884 ;; land each time you press C-s or C-r to repeat a pending search.
2885 ;; Highlighting of these additional matches happens in a deferred
2886 ;; fashion using "idle timers," so the cycles needed do not rob
2887 ;; isearch of its usual snappy response.
2889 ;; IMPLEMENTATION NOTE: This depends on some isearch internals.
2890 ;; Specifically:
2891 ;; - `isearch-update' is expected to be called (at least) every time
2892 ;; the search string or window-start changes;
2893 ;; - `isearch-string' is expected to contain the current search
2894 ;; string as entered by the user;
2895 ;; - the type of the current search is expected to be given by
2896 ;; `isearch-word' and `isearch-regexp';
2897 ;; - the direction of the current search is expected to be given by
2898 ;; `isearch-forward';
2899 ;; - the variable `isearch-error' is expected to be true
2900 ;; only if `isearch-string' is an invalid regexp.
2902 (defvar isearch-lazy-highlight-overlays nil)
2903 (defvar isearch-lazy-highlight-wrapped nil)
2904 (defvar isearch-lazy-highlight-start-limit nil)
2905 (defvar isearch-lazy-highlight-end-limit nil)
2906 (defvar isearch-lazy-highlight-start nil)
2907 (defvar isearch-lazy-highlight-end nil)
2908 (defvar isearch-lazy-highlight-timer nil)
2909 (defvar isearch-lazy-highlight-last-string nil)
2910 (defvar isearch-lazy-highlight-window nil)
2911 (defvar isearch-lazy-highlight-window-start nil)
2912 (defvar isearch-lazy-highlight-window-end nil)
2913 (defvar isearch-lazy-highlight-case-fold-search nil)
2914 (defvar isearch-lazy-highlight-regexp nil)
2915 (defvar isearch-lazy-highlight-lax-whitespace nil)
2916 (defvar isearch-lazy-highlight-regexp-lax-whitespace nil)
2917 (defvar isearch-lazy-highlight-word nil)
2918 (defvar isearch-lazy-highlight-forward nil)
2919 (defvar isearch-lazy-highlight-error nil)
2921 (defun lazy-highlight-cleanup (&optional force)
2922 "Stop lazy highlighting and remove extra highlighting from current buffer.
2923 FORCE non-nil means do it whether or not `lazy-highlight-cleanup'
2924 is nil. This function is called when exiting an incremental search if
2925 `lazy-highlight-cleanup' is non-nil."
2926 (interactive '(t))
2927 (if (or force lazy-highlight-cleanup)
2928 (while isearch-lazy-highlight-overlays
2929 (delete-overlay (car isearch-lazy-highlight-overlays))
2930 (setq isearch-lazy-highlight-overlays
2931 (cdr isearch-lazy-highlight-overlays))))
2932 (when isearch-lazy-highlight-timer
2933 (cancel-timer isearch-lazy-highlight-timer)
2934 (setq isearch-lazy-highlight-timer nil)))
2936 (define-obsolete-function-alias 'isearch-lazy-highlight-cleanup
2937 'lazy-highlight-cleanup
2938 "22.1")
2940 (defun isearch-lazy-highlight-new-loop (&optional beg end)
2941 "Cleanup any previous `lazy-highlight' loop and begin a new one.
2942 BEG and END specify the bounds within which highlighting should occur.
2943 This is called when `isearch-update' is invoked (which can cause the
2944 search string to change or the window to scroll). It is also used
2945 by other Emacs features."
2946 (when (and (null executing-kbd-macro)
2947 (sit-for 0) ;make sure (window-start) is credible
2948 (or (not (equal isearch-string
2949 isearch-lazy-highlight-last-string))
2950 (not (eq (selected-window)
2951 isearch-lazy-highlight-window))
2952 (not (eq isearch-lazy-highlight-case-fold-search
2953 isearch-case-fold-search))
2954 (not (eq isearch-lazy-highlight-regexp
2955 isearch-regexp))
2956 (not (eq isearch-lazy-highlight-word
2957 isearch-word))
2958 (not (eq isearch-lazy-highlight-lax-whitespace
2959 isearch-lax-whitespace))
2960 (not (eq isearch-lazy-highlight-regexp-lax-whitespace
2961 isearch-regexp-lax-whitespace))
2962 (not (= (window-start)
2963 isearch-lazy-highlight-window-start))
2964 (not (= (window-end) ; Window may have been split/joined.
2965 isearch-lazy-highlight-window-end))
2966 (not (eq isearch-forward
2967 isearch-lazy-highlight-forward))
2968 ;; In case we are recovering from an error.
2969 (not (equal isearch-error
2970 isearch-lazy-highlight-error))))
2971 ;; something important did indeed change
2972 (lazy-highlight-cleanup t) ;kill old loop & remove overlays
2973 (setq isearch-lazy-highlight-error isearch-error)
2974 ;; It used to check for `(not isearch-error)' here, but actually
2975 ;; lazy-highlighting might find matches to highlight even when
2976 ;; `isearch-error' is non-nil. (Bug#9918)
2977 (setq isearch-lazy-highlight-start-limit beg
2978 isearch-lazy-highlight-end-limit end)
2979 (setq isearch-lazy-highlight-window (selected-window)
2980 isearch-lazy-highlight-window-start (window-start)
2981 isearch-lazy-highlight-window-end (window-end)
2982 ;; Start lazy-highlighting at the beginning of the found
2983 ;; match (`isearch-other-end'). If no match, use point.
2984 ;; One of the next two variables (depending on search direction)
2985 ;; is used to define the starting position of lazy-highlighting
2986 ;; and also to remember the current position of point between
2987 ;; calls of `isearch-lazy-highlight-update', and another variable
2988 ;; is used to define where the wrapped search must stop.
2989 isearch-lazy-highlight-start (or isearch-other-end (point))
2990 isearch-lazy-highlight-end (or isearch-other-end (point))
2991 isearch-lazy-highlight-wrapped nil
2992 isearch-lazy-highlight-last-string isearch-string
2993 isearch-lazy-highlight-case-fold-search isearch-case-fold-search
2994 isearch-lazy-highlight-regexp isearch-regexp
2995 isearch-lazy-highlight-lax-whitespace isearch-lax-whitespace
2996 isearch-lazy-highlight-regexp-lax-whitespace isearch-regexp-lax-whitespace
2997 isearch-lazy-highlight-word isearch-word
2998 isearch-lazy-highlight-forward isearch-forward)
2999 (unless (equal isearch-string "")
3000 (setq isearch-lazy-highlight-timer
3001 (run-with-idle-timer lazy-highlight-initial-delay nil
3002 'isearch-lazy-highlight-update)))))
3004 (defun isearch-lazy-highlight-search ()
3005 "Search ahead for the next or previous match, for lazy highlighting.
3006 Attempt to do the search exactly the way the pending Isearch would."
3007 (condition-case nil
3008 (let ((case-fold-search isearch-lazy-highlight-case-fold-search)
3009 (isearch-regexp isearch-lazy-highlight-regexp)
3010 (isearch-word isearch-lazy-highlight-word)
3011 (isearch-lax-whitespace
3012 isearch-lazy-highlight-lax-whitespace)
3013 (isearch-regexp-lax-whitespace
3014 isearch-lazy-highlight-regexp-lax-whitespace)
3015 (isearch-forward isearch-lazy-highlight-forward)
3016 (search-invisible nil) ; don't match invisible text
3017 (retry t)
3018 (success nil)
3019 (bound (if isearch-lazy-highlight-forward
3020 (min (or isearch-lazy-highlight-end-limit (point-max))
3021 (if isearch-lazy-highlight-wrapped
3022 isearch-lazy-highlight-start
3023 (window-end)))
3024 (max (or isearch-lazy-highlight-start-limit (point-min))
3025 (if isearch-lazy-highlight-wrapped
3026 isearch-lazy-highlight-end
3027 (window-start))))))
3028 ;; Use a loop like in `isearch-search'.
3029 (while retry
3030 (setq success (isearch-search-string
3031 isearch-lazy-highlight-last-string bound t))
3032 ;; Clear RETRY unless the search predicate says
3033 ;; to skip this search hit.
3034 (if (or (not success)
3035 (= (point) bound) ; like (bobp) (eobp) in `isearch-search'.
3036 (= (match-beginning 0) (match-end 0))
3037 (funcall isearch-filter-predicate
3038 (match-beginning 0) (match-end 0)))
3039 (setq retry nil)))
3040 success)
3041 (error nil)))
3043 (defun isearch-lazy-highlight-update ()
3044 "Update highlighting of other matches for current search."
3045 (let ((max lazy-highlight-max-at-a-time)
3046 (looping t)
3047 nomore)
3048 (with-local-quit
3049 (save-selected-window
3050 (if (and (window-live-p isearch-lazy-highlight-window)
3051 (not (eq (selected-window) isearch-lazy-highlight-window)))
3052 (select-window isearch-lazy-highlight-window))
3053 (save-excursion
3054 (save-match-data
3055 (goto-char (if isearch-lazy-highlight-forward
3056 isearch-lazy-highlight-end
3057 isearch-lazy-highlight-start))
3058 (while looping
3059 (let ((found (isearch-lazy-highlight-search)))
3060 (when max
3061 (setq max (1- max))
3062 (if (<= max 0)
3063 (setq looping nil)))
3064 (if found
3065 (let ((mb (match-beginning 0))
3066 (me (match-end 0)))
3067 (if (= mb me) ;zero-length match
3068 (if isearch-lazy-highlight-forward
3069 (if (= mb (if isearch-lazy-highlight-wrapped
3070 isearch-lazy-highlight-start
3071 (window-end)))
3072 (setq found nil)
3073 (forward-char 1))
3074 (if (= mb (if isearch-lazy-highlight-wrapped
3075 isearch-lazy-highlight-end
3076 (window-start)))
3077 (setq found nil)
3078 (forward-char -1)))
3080 ;; non-zero-length match
3081 (let ((ov (make-overlay mb me)))
3082 (push ov isearch-lazy-highlight-overlays)
3083 ;; 1000 is higher than ediff's 100+,
3084 ;; but lower than isearch main overlay's 1001
3085 (overlay-put ov 'priority 1000)
3086 (overlay-put ov 'face lazy-highlight-face)
3087 (overlay-put ov 'window (selected-window))))
3088 ;; Remember the current position of point for
3089 ;; the next call of `isearch-lazy-highlight-update'
3090 ;; when `lazy-highlight-max-at-a-time' is too small.
3091 (if isearch-lazy-highlight-forward
3092 (setq isearch-lazy-highlight-end (point))
3093 (setq isearch-lazy-highlight-start (point)))))
3095 ;; not found or zero-length match at the search bound
3096 (if (not found)
3097 (if isearch-lazy-highlight-wrapped
3098 (setq looping nil
3099 nomore t)
3100 (setq isearch-lazy-highlight-wrapped t)
3101 (if isearch-lazy-highlight-forward
3102 (progn
3103 (setq isearch-lazy-highlight-end (window-start))
3104 (goto-char (max (or isearch-lazy-highlight-start-limit (point-min))
3105 (window-start))))
3106 (setq isearch-lazy-highlight-start (window-end))
3107 (goto-char (min (or isearch-lazy-highlight-end-limit (point-max))
3108 (window-end))))))))
3109 (unless nomore
3110 (setq isearch-lazy-highlight-timer
3111 (run-at-time lazy-highlight-interval nil
3112 'isearch-lazy-highlight-update)))))))))
3114 (defun isearch-resume (string regexp word forward message case-fold)
3115 "Resume an incremental search.
3116 STRING is the string or regexp searched for.
3117 REGEXP non-nil means the resumed search was a regexp search.
3118 WORD non-nil means resume a word search.
3119 FORWARD non-nil means resume a forward search.
3120 MESSAGE is the echo-area message recorded for the search resumed.
3121 CASE-FOLD non-nil means the search was case-insensitive."
3122 (isearch-mode forward regexp nil nil word)
3123 (setq isearch-string string
3124 isearch-message message
3125 isearch-case-fold-search case-fold)
3126 (isearch-search)
3127 (isearch-update))
3129 ;;; isearch.el ends here