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-;;; isearch.el --- incremental search minor mode.
-
-;; Copyright (C) 1992, 1993 Free Software Foundation, Inc.
-
-;; Author: Daniel LaLiberte <liberte@cs.uiuc.edu>
-
-;; |$Date: 1994/01/21 04:19:19 $|$Revision: 1.64 $
-
-;; This file is part of GNU Emacs.
-
-;; GNU Emacs is free software; you can redistribute it and/or modify
-;; it under the terms of the GNU General Public License as published by
-;; the Free Software Foundation; either version 2, or (at your option)
-;; any later version.
-
-;; GNU Emacs is distributed in the hope that it will be useful,
-;; but WITHOUT ANY WARRANTY; without even the implied warranty of
-;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-;; GNU General Public License for more details.
-
-;; You should have received a copy of the GNU General Public License
-;; along with GNU Emacs; see the file COPYING. If not, write to
-;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
-
-;;; Commentary:
-
-;;;====================================================================
-;; Instructions
-
-;; For programmed use of isearch-mode, e.g. calling (isearch-forward),
-;; isearch-mode behaves modally and does not return until the search
-;; is completed. It uses a recursive-edit to behave this way. Note:
-;; gnus does it wrong: (call-interactively 'isearch-forward).
-
-;; The key bindings active within isearch-mode are defined below in
-;; `isearch-mode-map' which is given bindings close to the default
-;; characters of the original isearch.el. With `isearch-mode',
-;; however, you can bind multi-character keys and it should be easier
-;; to add new commands. One bug though: keys with meta-prefix cannot
-;; be longer than two chars. Also see minibuffer-local-isearch-map
-;; for bindings active during `isearch-edit-string'.
-
-;; Note to emacs version 19 users: isearch-mode should work even if
-;; you switch windows with the mouse, in which case isearch-mode is
-;; terminated automatically before the switch. This is true of lemacs
-;; too, with a few more cleanups I've neglected in this release.
-;; No one has supplied patches for epoch yet.
-
-;; The search ring and completion commands automatically put you in
-;; the minibuffer to edit the string. This gives you a chance to
-;; modify the search string before executing the search. There are
-;; three commands to terminate the editing: C-s and C-r exit the
-;; minibuffer and search forward and reverse respectively, while C-m
-;; exits and does a nonincremental search.
-
-;; Exiting immediately from isearch uses isearch-edit-string instead
-;; of nonincremental-search, if search-nonincremental-instead is non-nil.
-;; The name of this option should probably be changed if we decide to
-;; keep the behavior. No point in forcing nonincremental search until
-;; the last possible moment.
-
-;; TODO
-;; - Integrate the emacs 19 generalized command history.
-;; - Think about incorporating query-replace.
-;; - Hooks and options for failed search.
-
-;;; Change Log:
-
-;;; Changes before those recorded in ChangeLog:
-
-;;; Revision 1.4 92/09/14 16:26:02 liberte
-;;; Added prefix args to isearch-forward, etc. to switch between
-;;; string and regular expression searching.
-;;; Added some support for lemacs.
-;;; Added general isearch-highlight option - but only for lemacs so far.
-;;; Added support for frame switching in emacs 19.
-;;; Added word search option to isearch-edit-string.
-;;; Renamed isearch-quit to isearch-abort.
-;;; Numerous changes to comments and doc strings.
-;;;
-;;; Revision 1.3 92/06/29 13:10:08 liberte
-;;; Moved modal isearch-mode handling into isearch-mode.
-;;; Got rid of buffer-local isearch variables.
-;;; isearch-edit-string used by ring adjustments, completion, and
-;;; nonincremental searching. C-s and C-r are additional exit commands.
-;;; Renamed all regex to regexp.
-;;; Got rid of found-start and found-point globals.
-;;; Generalized handling of upper-case chars.
-
-;;; Revision 1.2 92/05/27 11:33:57 liberte
-;;; Emacs version 19 has a search ring, which is supported here.
-;;; Other fixes found in the version 19 isearch are included here.
-;;;
-;;; Also see variables search-caps-disable-folding,
-;;; search-nonincremental-instead, search-whitespace-regexp, and
-;;; commands isearch-toggle-regexp, isearch-edit-string.
-;;;
-;;; semi-modal isearching is supported.
-
-;;; Changes for 1.1
-;;; 3/18/92 Fixed invalid-regexp.
-;;; 3/18/92 Fixed yanking in regexps.
-
-;;; Code:
-
-
-;;;=========================================================================
-;;; Emacs features
-
-;; isearch-mode takes advantage of the features provided by several
-;; different versions of emacs. Rather than testing the version of
-;; emacs, several constants are defined, one for each of the features.
-;; Each of the tests below must work on any version of emacs.
-;; (Perhaps provide and featurep could be used for this purpose.)
-
-(defconst isearch-gnu-emacs-events (fboundp 'set-frame-height)) ;; emacs 19
-(defconst isearch-pre-command-hook-exists (boundp 'pre-command-hook)) ;; lemacs
-(defconst isearch-event-data-type nil) ;; lemacs
-
-(defconst search-exit-option t
- "*Non-nil means random control characters terminate incremental search.")
-
-(defvar search-slow-window-lines 1
- "*Number of lines in slow search display windows.
-These are the short windows used during incremental search on slow terminals.
-Negative means put the slow search window at the top (normally it's at bottom)
-and the value is minus the number of lines.")
-
-(defvar search-slow-speed 1200
- "*Highest terminal speed at which to use \"slow\" style incremental search.
-This is the style where a one-line window is created to show the line
-that the search has reached.")
-
-;;;========================================================================
-;;; Some additional options and constants.
-
-(defvar search-upper-case 'not-yanks
- "*If non-nil, upper case chars disable case fold searching.
-That is, upper and lower case chars must match exactly.
-This applies no matter where the chars come from, but does not
-apply to chars in regexps that are prefixed with `\\'.
-If this value is `not-yanks', yanked text is always downcased.")
-
-(defvar search-nonincremental-instead t
- "*If non-nil, do a nonincremental search instead if exiting immediately.
-Actually, `isearch-edit-string' is called to let you enter the search
-string, and RET terminates editing and does a nonincremental search.")
-
-(defconst search-whitespace-regexp "\\s-+"
- "*If non-nil, regular expression to match a sequence of whitespace chars.
-You might want to use something like \"[ \\t\\r\\n]+\" instead.")
-
-;; I removed the * from the doc string because highlighting is not
-;; currently a clean thing to do. Once highlighting is made clean,
-;; this feature can be re-enabled and advertised.
-(defvar search-highlight nil
- "*Non-nil means incremental search highlights the current match.")
-
-(defvar isearch-mode-hook nil
- "Function(s) to call after starting up an incremental search.")
-
-(defvar isearch-mode-end-hook nil
- "Function(s) to call after terminating an incremental search.")
-
-;;;==================================================================
-;;; Search ring.
-
-(defvar search-ring nil
- "List of search string sequences.")
-(defvar regexp-search-ring nil
- "List of regular expression search string sequences.")
-
-(defconst search-ring-max 16
- "*Maximum length of search ring before oldest elements are thrown away.")
-(defconst regexp-search-ring-max 16
- "*Maximum length of regexp search ring before oldest elements are thrown away.")
-
-(defvar search-ring-yank-pointer nil
- "Index in `search-ring' of last string reused.
-nil if none yet.")
-(defvar regexp-search-ring-yank-pointer nil
- "Index in `regexp-search-ring' of last string reused.
-nil if none yet.")
-
-(defvar search-ring-update nil
- "*Non-nil if advancing or retreating in the search ring should cause search.
-Default value, nil, means edit the string instead.")
-
-;;;====================================================
-;;; Define isearch-mode keymap.
-
-(defvar isearch-mode-map nil
- "Keymap for isearch-mode.")
-
-(or isearch-mode-map
- (let* ((i 0)
- (map (make-keymap)))
- (or (vectorp (nth 1 map))
- (error "The initialization of isearch-mode-map must be updated"))
- ;; Give this map a vector 256 long, for dense binding
- ;; of a larger range of ordinary characters.
- (setcar (cdr map) (make-vector 256 nil))
-
- ;; Make function keys, etc, exit the search.
- (define-key map [t] 'isearch-other-control-char)
- ;; Control chars, by default, end isearch mode transparently.
- ;; We need these explicit definitions because, in a dense keymap,
- ;; the binding for t does not affect characters.
- ;; We use a dense keymap to save space.
- (while (< i ?\ )
- (define-key map (make-string 1 i) 'isearch-other-control-char)
- (setq i (1+ i)))
-
- ;; Printing chars extend the search string by default.
- (setq i ?\ )
- (while (< i (length (nth 1 map)))
- (define-key map (vector i) 'isearch-printing-char)
- (setq i (1+ i)))
-
- ;; Several non-printing chars change the searching behavior.
- (define-key map "\C-s" 'isearch-repeat-forward)
- (define-key map "\C-r" 'isearch-repeat-backward)
- (define-key map "\177" 'isearch-delete-char)
- (define-key map "\C-g" 'isearch-abort)
-
- (define-key map "\C-q" 'isearch-quote-char)
-
- (define-key map "\r" 'isearch-exit)
- (define-key map "\C-j" 'isearch-printing-char)
- (define-key map "\t" 'isearch-printing-char)
- (define-key map " " 'isearch-whitespace-chars)
-
- (define-key map "\C-w" 'isearch-yank-word)
- (define-key map "\C-y" 'isearch-yank-line)
- (define-key map [mouse-2] 'isearch-yank-kill)
- ;; This overrides the default binding for t.
- (define-key map [down-mouse-2] 'nil)
-
- ;; Bind the ASCII-equivalent "function keys" explicitly
- ;; if we bind their equivalents,
- ;; since otherwise the default binding would override.
- ;; We bind [escape] below.
- (define-key map [tab] 'isearch-printing-char)
- (define-key map [kp-0] 'isearch-printing-char)
- (define-key map [kp-1] 'isearch-printing-char)
- (define-key map [kp-2] 'isearch-printing-char)
- (define-key map [kp-3] 'isearch-printing-char)
- (define-key map [kp-4] 'isearch-printing-char)
- (define-key map [kp-5] 'isearch-printing-char)
- (define-key map [kp-6] 'isearch-printing-char)
- (define-key map [kp-7] 'isearch-printing-char)
- (define-key map [kp-8] 'isearch-printing-char)
- (define-key map [kp-9] 'isearch-printing-char)
- (define-key map [kp-add] 'isearch-printing-char)
- (define-key map [kp-subtract] 'isearch-printing-char)
- (define-key map [kp-multiply] 'isearch-printing-char)
- (define-key map [kp-divide] 'isearch-printing-char)
- (define-key map [kp-decimal] 'isearch-printing-char)
- (define-key map [kp-separator] 'isearch-printing-char)
- (define-key map [kp-equal] 'isearch-printing-char)
- (define-key map [kp-tab] 'isearch-printing-char)
- (define-key map [kp-space] 'isearch-printing-char)
- (define-key map [kp-enter] 'isearch-exit)
- (define-key map [delete] 'isearch-delete-char)
- (define-key map [backspace] 'isearch-delete-char)
- (define-key map [return] 'isearch-exit)
- (define-key map [newline] 'isearch-printing-char)
-
- ;; Define keys for regexp chars * ? |.
- ;; Nothing special for + because it matches at least once.
- (define-key map "*" 'isearch-*-char)
- (define-key map "?" 'isearch-*-char)
- (define-key map "|" 'isearch-|-char)
-
-;;; Turned off because I find I expect to get the global definition--rms.
-;;; ;; Instead bind C-h to special help command for isearch-mode.
-;;; (define-key map "\C-h" 'isearch-mode-help)
-
- ;; To handle local bindings with meta char prefix keys, define
- ;; another full keymap. This must be done for any other prefix
- ;; keys as well, one full keymap per char of the prefix key. It
- ;; would be simpler to disable the global keymap, and/or have a
- ;; default local key binding for any key not otherwise bound.
- (let ((meta-map (make-sparse-keymap)))
- (define-key map (char-to-string meta-prefix-char) meta-map)
- (define-key map [escape] meta-map))
- (define-key map (vector meta-prefix-char t) 'isearch-other-meta-char)
-
- (define-key map "\M-n" 'isearch-ring-advance)
- (define-key map "\M-p" 'isearch-ring-retreat)
- (define-key map "\M-y" 'isearch-yank-kill)
-
- (define-key map "\M-\t" 'isearch-complete)
-
- ;; For emacs 19, switching frames should terminate isearch-mode
- (if isearch-gnu-emacs-events
- (define-key map [switch-frame] 'isearch-switch-frame-handler))
-
- (setq isearch-mode-map map)
- ))
-
-;; Some bindings you may want to put in your isearch-mode-hook.
-;; Suggest some alternates...
-;; (define-key isearch-mode-map "\C-t" 'isearch-toggle-regexp)
-;; (define-key isearch-mode-map "\C-^" 'isearch-edit-string)
-
-
-(defvar minibuffer-local-isearch-map nil
- "Keymap for editing isearch strings in the minibuffer.")
-
-(or minibuffer-local-isearch-map
- (let ((map (copy-keymap minibuffer-local-map)))
- (define-key map "\r" 'isearch-nonincremental-exit-minibuffer)
- (define-key map "\M-n" 'isearch-ring-advance-edit)
- (define-key map "\M-p" 'isearch-ring-retreat-edit)
- (define-key map "\M-\t" 'isearch-complete-edit)
- (define-key map "\C-s" 'isearch-forward-exit-minibuffer)
- (define-key map "\C-r" 'isearch-reverse-exit-minibuffer)
- (setq minibuffer-local-isearch-map map)
- ))
-
-;;;========================================================
-;; Internal variables declared globally for byte-compiler.
-;; These are all set with setq while isearching
-;; and bound locally while editing the search string.
-
-(defvar isearch-forward nil) ; Searching in the forward direction.
-(defvar isearch-regexp nil) ; Searching for a regexp.
-(defvar isearch-word nil) ; Searching for words.
-
-(defvar isearch-cmds nil) ; Stack of search status sets.
-(defvar isearch-string "") ; The current search string.
-(defvar isearch-message "") ; text-char-description version of isearch-string
-
-(defvar isearch-success t) ; Searching is currently successful.
-(defvar isearch-invalid-regexp nil) ; Regexp not well formed.
-(defvar isearch-within-brackets nil) ; Regexp has unclosed [.
-(defvar isearch-other-end nil) ; Start (end) of match if forward (backward).
-(defvar isearch-wrapped nil) ; Searching restarted from the top (bottom).
-(defvar isearch-barrier 0)
-
-(defvar isearch-case-fold-search nil) ; case-fold-search while searching.
-
-(defvar isearch-adjusted nil)
-(defvar isearch-slow-terminal-mode nil)
-;;; If t, using a small window.
-(defvar isearch-small-window nil)
-(defvar isearch-opoint 0)
-;;; The window configuration active at the beginning of the search.
-(defvar isearch-window-configuration nil)
-
-;; Flag to indicate a yank occurred, so don't move the cursor.
-(defvar isearch-yank-flag nil)
-
-;;; A function to be called after each input character is processed.
-;;; (It is not called after characters that exit the search.)
-;;; It is only set from an optional argument to `isearch-mode'.
-(defvar isearch-op-fun nil)
-
-;;; Is isearch-mode in a recursive edit for modal searching.
-(defvar isearch-recursive-edit nil)
-
-;;; Should isearch be terminated after doing one search?
-(defvar isearch-nonincremental nil)
-
-;; New value of isearch-forward after isearch-edit-string.
-(defvar isearch-new-forward nil)
-
-
-;;;==============================================================
-;; Minor-mode-alist changes - kind of redundant with the
-;; echo area, but if isearching in multiple windows, it can be useful.
-
-(or (assq 'isearch-mode minor-mode-alist)
- (nconc minor-mode-alist
- (list '(isearch-mode isearch-mode))))
-
-(defvar isearch-mode nil) ;; Name of the minor mode, if non-nil.
-(make-variable-buffer-local 'isearch-mode)
-
-(define-key global-map "\C-s" 'isearch-forward)
-(define-key esc-map "\C-s" 'isearch-forward-regexp)
-(define-key global-map "\C-r" 'isearch-backward)
-(define-key esc-map "\C-r" 'isearch-backward-regexp)
-
-;;;===============================================================
-;;; Entry points to isearch-mode.
-;;; These four functions should replace those in loaddefs.el
-;;; An alternative is to defalias isearch-forward etc to isearch-mode,
-;;; and look at this-command to set the options accordingly.
-
-(defun isearch-forward (&optional regexp-p no-recursive-edit)
- "\
-Do incremental search forward.
-With a prefix argument, do an incremental regular expression search instead.
-\\<isearch-mode-map>
-As you type characters, they add to the search string and are found.
-The following non-printing keys are bound in `isearch-mode-map'.
-
-Type \\[isearch-delete-char] to cancel characters from end of search string.
-Type \\[isearch-exit] to exit, leaving point at location found.
-Type LFD (C-j) to match end of line.
-Type \\[isearch-repeat-forward] to search again forward,\
- \\[isearch-repeat-backward] to search again backward.
-Type \\[isearch-yank-word] to yank word from buffer onto end of search\
- string and search for it.
-Type \\[isearch-yank-line] to yank rest of line onto end of search string\
- and search for it.
-Type \\[isearch-quote-char] to quote control character to search for it.
-\\[isearch-abort] while searching or when search has failed cancels input\
- back to what has
- been found successfully.
-\\[isearch-abort] when search is successful aborts and moves point to\
- starting point.
-
-Also supported is a search ring of the previous 16 search strings.
-Type \\[isearch-ring-advance] to search for the next item in the search ring.
-Type \\[isearch-ring-retreat] to search for the previous item in the search\
- ring.
-Type \\[isearch-complete] to complete the search string using the search ring.
-
-The above keys, bound in `isearch-mode-map', are often controlled by
- options; do M-x apropos on search-.* to find them.
-Other control and meta characters terminate the search
- and are then executed normally (depending on `search-exit-option').
-
-If this function is called non-interactively, it does not return to
-the calling function until the search is done."
-
- (interactive "P\np")
- (isearch-mode t (not (null regexp-p)) nil (not no-recursive-edit)))
-
-(defun isearch-forward-regexp (&optional not-regexp no-recursive-edit)
- "\
-Do incremental search forward for regular expression.
-With a prefix argument, do a regular string search instead.
-Like ordinary incremental search except that your input
-is treated as a regexp. See \\[isearch-forward] for more info."
- (interactive "P\np")
- (isearch-mode t (null not-regexp) nil (not no-recursive-edit)))
-
-(defun isearch-backward (&optional regexp-p no-recursive-edit)
- "\
-Do incremental search backward.
-With a prefix argument, do a regular expression search instead.
-See \\[isearch-forward] for more information."
- (interactive "P\np")
- (isearch-mode nil (not (null regexp-p)) nil (not no-recursive-edit)))
-
-(defun isearch-backward-regexp (&optional not-regexp no-recursive-edit)
- "\
-Do incremental search backward for regular expression.
-With a prefix argument, do a regular string search instead.
-Like ordinary incremental search except that your input
-is treated as a regexp. See \\[isearch-forward] for more info."
- (interactive "P\np")
- (isearch-mode nil (null not-regexp) nil (not no-recursive-edit)))
-
-
-(defun isearch-mode-help ()
- (interactive)
- (describe-function 'isearch-forward)
- (isearch-update))
-
-
-;;;==================================================================
-;; isearch-mode only sets up incremental search for the minor mode.
-;; All the work is done by the isearch-mode commands.
-
-;; Not used yet:
-;;(defconst isearch-commands '(isearch-forward isearch-backward
-;; isearch-forward-regexp isearch-backward-regexp)
-;; "List of commands for which isearch-mode does not recursive-edit.")
-
-
-(defun isearch-mode (forward &optional regexp op-fun recursive-edit word-p)
- "Start isearch minor mode. Called by isearch-forward, etc."
-
- ;; Initialize global vars.
- (setq isearch-forward forward
- isearch-regexp regexp
- isearch-word word-p
- isearch-op-fun op-fun
- isearch-case-fold-search case-fold-search
- isearch-string ""
- isearch-message ""
- isearch-cmds nil
- isearch-success t
- isearch-wrapped nil
- isearch-barrier (point)
- isearch-adjusted nil
- isearch-yank-flag nil
- isearch-invalid-regexp nil
- isearch-within-brackets nil
- ;; Use (baud-rate) for now, for sake of other versions.
- isearch-slow-terminal-mode (and (<= (baud-rate) search-slow-speed)
- (> (window-height)
- (* 4 search-slow-window-lines)))
- isearch-other-end nil
- isearch-small-window nil
-
- isearch-opoint (point)
- search-ring-yank-pointer nil
- regexp-search-ring-yank-pointer nil)
- (setq isearch-window-configuration
- (if isearch-slow-terminal-mode (current-window-configuration) nil))
-
-;; This was for Lucid Emacs. But now that we have pre-command-hook,
-;; it causes trouble.
-;; (if isearch-pre-command-hook-exists
-;; (add-hook 'pre-command-hook 'isearch-pre-command-hook))
- (setq isearch-mode " Isearch") ;; forward? regexp?
- (set-buffer-modified-p (buffer-modified-p)) ; update modeline
-
- ;; It is ugly to show region highlighting while the search
- ;; is going on. And we don't want the mark active at the end either.
- (setq deactivate-mark t)
-
- (isearch-push-state)
-
- (make-local-variable 'overriding-local-map)
- (setq overriding-local-map isearch-mode-map)
- (isearch-update)
- (run-hooks 'isearch-mode-hook)
-
- ;; isearch-mode can be made modal (in the sense of not returning to
- ;; the calling function until searching is completed) by entering
- ;; a recursive-edit and exiting it when done isearching.
- (if recursive-edit
- (let ((isearch-recursive-edit t))
- (recursive-edit)))
- )
-
-
-;;;====================================================
-;; Some high level utilities. Others below.
-
-(defun isearch-update ()
- ;; Called after each command to update the display.
- (if (if isearch-event-data-type
- (null unread-command-event)
- (if isearch-gnu-emacs-events
- (null unread-command-events)
- (< unread-command-char 0)))
- (progn
- (if (not (input-pending-p))
- (isearch-message))
- (if (and isearch-slow-terminal-mode
- (not (or isearch-small-window
- (pos-visible-in-window-p))))
- (let ((found-point (point)))
- (setq isearch-small-window t)
- (move-to-window-line 0)
- (let ((window-min-height 1))
- (split-window nil (if (< search-slow-window-lines 0)
- (1+ (- search-slow-window-lines))
- (- (window-height)
- (1+ search-slow-window-lines)))))
- (if (< search-slow-window-lines 0)
- (progn (vertical-motion (- 1 search-slow-window-lines))
- (set-window-start (next-window) (point))
- (set-window-hscroll (next-window)
- (window-hscroll))
- (set-window-hscroll (selected-window) 0))
- (other-window 1))
- (goto-char found-point)))
- (if isearch-other-end
- (if (< isearch-other-end (point)) ; isearch-forward?
- (isearch-highlight isearch-other-end (point))
- (isearch-highlight (point) isearch-other-end))
- (isearch-dehighlight nil))
- ))
- (setq ;; quit-flag nil not for isearch-mode
- isearch-adjusted nil
- isearch-yank-flag nil)
- )
-
-
-(defun isearch-done (&optional nopush)
- ;; Called by all commands that terminate isearch-mode.
- ;; If NOPUSH is non-nil, we don't push the string on the search ring.
- (setq overriding-local-map nil)
- ;; (setq pre-command-hook isearch-old-pre-command-hook) ; for lemacs
- (isearch-dehighlight t)
- (let ((found-start (window-start (selected-window)))
- (found-point (point)))
- (if isearch-window-configuration
- (set-window-configuration isearch-window-configuration))
-
- (if isearch-small-window
- (goto-char found-point)
- ;; Exiting the save-window-excursion clobbers window-start; restore it.
- (set-window-start (selected-window) found-start t)))
-
- ;; If there was movement, mark the starting position.
- ;; Maybe should test difference between and set mark iff > threshold.
- (if (/= (point) isearch-opoint)
- (progn
- (push-mark isearch-opoint t)
- (deactivate-mark)
- (or executing-macro (> (minibuffer-depth) 0)
- (message "Mark saved where search started")))
- ;; (message "") why is this needed?
- )
-
- (setq isearch-mode nil)
- (set-buffer-modified-p (buffer-modified-p)) ;; update modeline
-
- (if (and (> (length isearch-string) 0) (not nopush))
- ;; Update the ring data.
- (if isearch-regexp
- (if (or (null regexp-search-ring)
- (not (string= isearch-string (car regexp-search-ring))))
- (progn
- (setq regexp-search-ring
- (cons isearch-string regexp-search-ring))
- (if (> (length regexp-search-ring) regexp-search-ring-max)
- (setcdr (nthcdr (1- search-ring-max) regexp-search-ring)
- nil))))
- (if (or (null search-ring)
- (not (string= isearch-string (car search-ring))))
- (progn
- (setq search-ring (cons isearch-string search-ring))
- (if (> (length search-ring) search-ring-max)
- (setcdr (nthcdr (1- search-ring-max) search-ring) nil))))))
-
- (run-hooks 'isearch-mode-end-hook)
- (if isearch-recursive-edit (exit-recursive-edit)))
-
-;;;=======================================================
-;;; Switching buffers should first terminate isearch-mode.
-;;; This is done quite differently for each variant of emacs.
-;;; For lemacs, see Exiting in lemacs below
-
-;; For Emacs 19, the frame switch event is handled.
-(defun isearch-switch-frame-handler ()
- (interactive) ;; Is this necessary?
- ;; First terminate isearch-mode.
- (isearch-done)
- (handle-switch-frame (car (cdr (isearch-last-command-char)))))
-
-;;;========================================================
-
-
-;;;====================================================
-;; Commands active while inside of the isearch minor mode.
-
-(defun isearch-exit ()
- "Exit search normally.
-However, if this is the first command after starting incremental
-search and `search-nonincremental-instead' is non-nil, do a
-nonincremental search instead via `isearch-edit-string'."
- (interactive)
- (if (and search-nonincremental-instead
- (= 0 (length isearch-string)))
- (let ((isearch-nonincremental t))
- (isearch-edit-string)))
- (isearch-done))
-
-
-(defun isearch-edit-string ()
- "Edit the search string in the minibuffer.
-The following additional command keys are active while editing.
-\\<minibuffer-local-isearch-map>
-\\[exit-minibuffer] to resume incremental searching with the edited string.
-\\[isearch-nonincremental-exit-minibuffer] to do one nonincremental search.
-\\[isearch-forward-exit-minibuffer] to resume isearching forward.
-\\[isearch-backward-exit-minibuffer] to resume isearching backward.
-\\[isearch-ring-advance-edit] to replace the search string with the next item in the search ring.
-\\[isearch-ring-retreat-edit] to replace the search string with the previous item in the search ring.
-\\[isearch-complete-edit] to complete the search string using the search ring.
-
-If first char entered is \\[isearch-yank-word], then do word search instead."
-
- ;; This code is very hairy for several reasons, explained in the code.
- ;; Mainly, isearch-mode must be terminated while editing and then restarted.
- ;; If there were a way to catch any change of buffer from the minibuffer,
- ;; this could be simplified greatly.
- ;; Editing doesn't back up the search point. Should it?
- (interactive)
- (condition-case err
- (let ((isearch-nonincremental isearch-nonincremental)
-
- ;; Locally bind all isearch global variables to protect them
- ;; from recursive isearching.
- ;; isearch-string -message and -forward are not bound
- ;; so they may be changed. Instead, save the values.
- (isearch-new-string isearch-string)
- (isearch-new-message isearch-message)
- (isearch-new-forward isearch-forward)
- (isearch-new-word isearch-word)
-
- (isearch-regexp isearch-regexp)
- (isearch-op-fun isearch-op-fun)
- (isearch-cmds isearch-cmds)
- (isearch-success isearch-success)
- (isearch-wrapped isearch-wrapped)
- (isearch-barrier isearch-barrier)
- (isearch-adjusted isearch-adjusted)
- (isearch-yank-flag isearch-yank-flag)
- (isearch-invalid-regexp isearch-invalid-regexp)
- (isearch-within-brackets isearch-within-brackets)
- (isearch-other-end isearch-other-end)
- (isearch-opoint isearch-opoint)
- (isearch-slow-terminal-mode isearch-slow-terminal-mode)
- (isearch-small-window isearch-small-window)
- (isearch-recursive-edit isearch-recursive-edit)
- ;; Save current configuration so we can restore it here.
- (isearch-window-configuration (current-window-configuration))
- )
-
- ;; Actually terminate isearching until editing is done.
- ;; This is so that the user can do anything without failure,
- ;; like switch buffers and start another isearch, and return.
- (condition-case err
- (isearch-done t)
- (exit nil)) ; was recursive editing
-
- (isearch-message) ;; for read-char
- (unwind-protect
- (let* (;; Why does following read-char echo?
- ;;(echo-keystrokes 0) ;; not needed with above message
- (e (let ((cursor-in-echo-area t))
- (read-event)))
- ;; Binding minibuffer-history-symbol to nil is a work-around
- ;; for some incompatibility with gmhist.
- (minibuffer-history-symbol))
- ;; If the first character the user types when we prompt them
- ;; for a string is the yank-word character, then go into
- ;; word-search mode. Otherwise unread that character and
- ;; read a key the normal way.
- ;; Word search does not apply (yet) to regexp searches,
- ;; no check is made here.
- (message (isearch-message-prefix nil nil t))
- (if (eq 'isearch-yank-word
- (lookup-key isearch-mode-map (vector e)))
- (setq isearch-word t ;; so message-prefix is right
- isearch-new-word t)
- (isearch-unread e))
- (setq cursor-in-echo-area nil)
- (setq isearch-new-string
- (let (junk-ring)
- (read-from-minibuffer (isearch-message-prefix)
- isearch-string
- minibuffer-local-isearch-map nil
- 'junk-ring))
- isearch-new-message (mapconcat 'text-char-description
- isearch-new-string "")))
- ;; Always resume isearching by restarting it.
- (isearch-mode isearch-forward
- isearch-regexp
- isearch-op-fun
- isearch-recursive-edit
- isearch-word)
-
- ;; Copy new local values to isearch globals
- (setq isearch-string isearch-new-string
- isearch-message isearch-new-message
- isearch-forward isearch-new-forward
- isearch-word isearch-new-word))
-
- ;; Empty isearch-string means use default.
- (if (= 0 (length isearch-string))
- (setq isearch-string (car (if isearch-regexp regexp-search-ring
- search-ring)))
- ;; This used to set the last search string,
- ;; but I think it is not right to do that here.
- ;; Only the string actually used should be saved.
- )
-
- ;; Reinvoke the pending search.
- (isearch-push-state)
- (isearch-search)
- (isearch-update)
- (if isearch-nonincremental
- (progn
- ;; (sit-for 1) ;; needed if isearch-done does: (message "")
- (isearch-done))))
-
- (quit ; handle abort-recursive-edit
- (isearch-abort) ;; outside of let to restore outside global values
- )))
-
-(defun isearch-nonincremental-exit-minibuffer ()
- (interactive)
- (setq isearch-nonincremental t)
- (exit-minibuffer))
-
-(defun isearch-forward-exit-minibuffer ()
- (interactive)
- (setq isearch-new-forward t)
- (exit-minibuffer))
-
-(defun isearch-reverse-exit-minibuffer ()
- (interactive)
- (setq isearch-new-forward nil)
- (exit-minibuffer))
-
-
-(defun isearch-abort ()
- "Abort incremental search mode if searching is successful, signalling quit.
-Otherwise, revert to previous successful search and continue searching.
-Use `isearch-exit' to quit without signalling."
- (interactive)
-;; (ding) signal instead below, if quitting
- (discard-input)
- (if isearch-success
- ;; If search is successful, move back to starting point
- ;; and really do quit.
- (progn (goto-char isearch-opoint)
- (isearch-done t) ; exit isearch
- (signal 'quit nil)) ; and pass on quit signal
- ;; If search is failing, rub out until it is once more successful.
- (while (not isearch-success) (isearch-pop-state))
- (isearch-update)))
-
-
-(defun isearch-repeat (direction)
- ;; Utility for isearch-repeat-forward and -backward.
- (if (eq isearch-forward (eq direction 'forward))
- ;; C-s in forward or C-r in reverse.
- (if (equal isearch-string "")
- ;; If search string is empty, use last one.
- (setq isearch-string
- (or (if isearch-regexp
- (car regexp-search-ring)
- (car search-ring))
- "")
- isearch-message
- (mapconcat 'isearch-text-char-description
- isearch-string ""))
- ;; If already have what to search for, repeat it.
- (or isearch-success
- (progn
-
- (goto-char (if isearch-forward (point-min) (point-max)))
- (setq isearch-wrapped t))))
- ;; C-s in reverse or C-r in forward, change direction.
- (setq isearch-forward (not isearch-forward)))
-
- (setq isearch-barrier (point)) ; For subsequent \| if regexp.
-
- (if (equal isearch-string "")
- (setq isearch-success t)
- (if (and isearch-success (equal (match-end 0) (match-beginning 0)))
- ;; If repeating a search that found
- ;; an empty string, ensure we advance.
- (if (if isearch-forward (eobp) (bobp))
- ;; If there's nowhere to advance to, fail (and wrap next time).
- (progn
- (setq isearch-success nil)
- (ding))
- (forward-char (if isearch-forward 1 -1))
- (isearch-search))
- (isearch-search)))
-
- (isearch-push-state)
- (isearch-update))
-
-(defun isearch-repeat-forward ()
- "Repeat incremental search forwards."
- (interactive)
- (isearch-repeat 'forward))
-
-(defun isearch-repeat-backward ()
- "Repeat incremental search backwards."
- (interactive)
- (isearch-repeat 'backward))
-
-(defun isearch-toggle-regexp ()
- "Toggle regexp searching on or off."
- ;; The status stack is left unchanged.
- (interactive)
- (setq isearch-regexp (not isearch-regexp))
- (if isearch-regexp (setq isearch-word nil))
- (isearch-update))
-
-(defun isearch-delete-char ()
- "Discard last input item and move point back.
-If no previous match was done, just beep."
- (interactive)
- (if (null (cdr isearch-cmds))
- (ding)
- (isearch-pop-state))
- (isearch-update))
-
-
-(defun isearch-yank (chunk)
- ;; Helper for isearch-yank-word and isearch-yank-line
- ;; CHUNK should be word, line or kill.
- (let ((string (cond
- ((eq chunk 'kill)
- (current-kill 0))
- (t
- (save-excursion
- (and (not isearch-forward) isearch-other-end
- (goto-char isearch-other-end))
- (buffer-substring
- (point)
- (save-excursion
- (cond
- ((eq chunk 'word)
- (forward-word 1))
- ((eq chunk 'line)
- (end-of-line)))
- (point))))))))
- ;; Downcase the string if not supposed to case-fold yanked strings.
- (if (and isearch-case-fold-search
- (eq 'not-yanks search-upper-case))
- (setq string (downcase string)))
- (if isearch-regexp (setq string (regexp-quote string)))
- (setq isearch-string (concat isearch-string string)
- isearch-message
- (concat isearch-message
- (mapconcat 'isearch-text-char-description
- string ""))
- ;; Don't move cursor in reverse search.
- isearch-yank-flag t))
- (isearch-search-and-update))
-
-(defun isearch-yank-kill ()
- "Pull string from kill ring into search string."
- (interactive)
- (isearch-yank 'kill))
-
-(defun isearch-yank-word ()
- "Pull next word from buffer into search string."
- (interactive)
- (isearch-yank 'word))
-
-(defun isearch-yank-line ()
- "Pull rest of line from buffer into search string."
- (interactive)
- (isearch-yank 'line))
-
-
-(defun isearch-search-and-update ()
- ;; Do the search and update the display.
- (if (and (not isearch-success)
- ;; unsuccessful regexp search may become
- ;; successful by addition of characters which
- ;; make isearch-string valid
- (not isearch-regexp))
- nil
- ;; In reverse search, adding stuff at
- ;; the end may cause zero or many more chars to be
- ;; matched, in the string following point.
- ;; Allow all those possibilities without moving point as
- ;; long as the match does not extend past search origin.
- (if (and (not isearch-forward) (not isearch-adjusted)
- (condition-case ()
- (looking-at (if isearch-regexp isearch-string
- (regexp-quote isearch-string)))
- (error nil))
- (or isearch-yank-flag
- (<= (match-end 0)
- (min isearch-opoint isearch-barrier))))
- (setq isearch-success t
- isearch-invalid-regexp nil
- isearch-within-brackets nil
- isearch-other-end (match-end 0))
- ;; Not regexp, not reverse, or no match at point.
- (if (and isearch-other-end (not isearch-adjusted))
- (goto-char (if isearch-forward isearch-other-end
- (min isearch-opoint
- isearch-barrier
- (1+ isearch-other-end)))))
- (isearch-search)
- ))
- (isearch-push-state)
- (if isearch-op-fun (funcall isearch-op-fun))
- (isearch-update))
-
-
-;; *, ?, and | chars can make a regexp more liberal.
-;; They can make a regexp match sooner or make it succeed instead of failing.
-;; So go back to place last successful search started
-;; or to the last ^S/^R (barrier), whichever is nearer.
-;; + needs no special handling because the string must match at least once.
-
-(defun isearch-*-char ()
- "Handle * and ? specially in regexps."
- (interactive)
- (if isearch-regexp
-
- (progn
- (setq isearch-adjusted t)
- (let ((cs (nth (if isearch-forward
- 5 ; isearch-other-end
- 2) ; saved (point)
- (car (cdr isearch-cmds)))))
- ;; (car isearch-cmds) is after last search;
- ;; (car (cdr isearch-cmds)) is from before it.
- (setq cs (or cs isearch-barrier))
- (goto-char
- (if isearch-forward
- (max cs isearch-barrier)
- (min cs isearch-barrier))))))
- (isearch-process-search-char (isearch-last-command-char)))
-
-
-(defun isearch-|-char ()
- "If in regexp search, jump to the barrier."
- (interactive)
- (if isearch-regexp
- (progn
- (setq isearch-adjusted t)
- (goto-char isearch-barrier)))
- (isearch-process-search-char (isearch-last-command-char)))
-
-
-(defalias 'isearch-other-control-char 'isearch-other-meta-char)
-
-(defun isearch-other-meta-char ()
- "Exit the search normally and reread this key sequence.
-But only if `search-exit-option' is non-nil, the default.
-If it is the symbol `edit', the search string is edited in the minibuffer
-and the meta character is unread so that it applies to editing the string."
- (interactive)
- (cond ((eq search-exit-option 'edit)
- (let ((key (this-command-keys)))
- (apply 'isearch-unread (listify-key-sequence key)))
- (isearch-edit-string))
- (search-exit-option
- (let ((key (this-command-keys))
- (index 0)
- window)
- (apply 'isearch-unread (listify-key-sequence key))
- ;; Properly handle scroll-bar and mode-line clicks
- ;; for which a dummy prefix event was generated as (aref key 0).
- (and (> (length key) 1)
- (symbolp (aref key 0))
- (listp (aref key 1))
- ;; These events now have a symbol; they used to have a list.
- ;; Accept either one. Other events have a number here.
- (not (numberp (posn-point (event-start (aref key 1)))))
- (setq index 1))
- ;; If we got a mouse click, maybe it was read with the buffer
- ;; it was clicked on. If so, that buffer, not the current one,
- ;; is in isearch mode. So end the search in that buffer.
- (if (and (listp (aref key index))
- (setq window (posn-window (event-start (aref key index))))
- (windowp window))
- (save-excursion
- (set-buffer (window-buffer window))
- (isearch-done))
- (isearch-done))))
- (t;; otherwise nil
- (isearch-process-search-string (this-command-keys)
- (this-command-keys)))))
-
-(defun isearch-quote-char ()
- "Quote special characters for incremental search."
- (interactive)
- (isearch-process-search-char (read-quoted-char (isearch-message t))))
-
-(defun isearch-return-char ()
- "Convert return into newline for incremental search.
-Obsolete."
- (interactive)
- (isearch-process-search-char ?\n))
-
-(defun isearch-printing-char ()
- "Add this ordinary printing character to the search string and search."
- (interactive)
- (isearch-process-search-char (isearch-last-command-char)))
-
-(defun isearch-whitespace-chars ()
- "Match all whitespace chars, if in regexp mode.
-If you want to search for just a space, type C-q SPC."
- (interactive)
- (if isearch-regexp
- (if (and search-whitespace-regexp (not isearch-within-brackets))
- (isearch-process-search-string search-whitespace-regexp " ")
- (isearch-printing-char))
- (progn
- ;; This way of doing word search doesn't correctly extend current search.
- ;; (setq isearch-word t)
- ;; (setq isearch-adjusted t)
- ;; (goto-char isearch-barrier)
- (isearch-printing-char))))
-
-(defun isearch-process-search-char (char)
- ;; Append the char to the search string, update the message and re-search.
- (isearch-process-search-string
- (isearch-char-to-string char)
- (isearch-text-char-description char)))
-
-(defun isearch-process-search-string (string message)
- (setq isearch-string (concat isearch-string string)
- isearch-message (concat isearch-message message))
- (isearch-search-and-update))
-
-
-;;===========================================================
-;; Search Ring
-
-(defun isearch-ring-adjust1 (advance)
- ;; Helper for isearch-ring-adjust
- (let* ((ring (if isearch-regexp regexp-search-ring search-ring))
- (length (length ring))
- (yank-pointer-name (if isearch-regexp
- 'regexp-search-ring-yank-pointer
- 'search-ring-yank-pointer))
- (yank-pointer (eval yank-pointer-name)))
- (if (zerop length)
- ()
- (set yank-pointer-name
- (setq yank-pointer
- (mod (+ (or yank-pointer 0)
- (if advance -1 1))
- length)))
- (setq isearch-string (nth yank-pointer ring)
- isearch-message (mapconcat 'isearch-text-char-description
- isearch-string "")))))
-
-(defun isearch-ring-adjust (advance)
- ;; Helper for isearch-ring-advance and isearch-ring-retreat
- (if (cdr isearch-cmds) ;; is there more than one thing on stack?
- (isearch-pop-state))
- (isearch-ring-adjust1 advance)
- (isearch-push-state)
- (if search-ring-update
- (progn
- (isearch-search)
- (isearch-update))
- (isearch-edit-string)
- ))
-
-(defun isearch-ring-advance ()
- "Advance to the next search string in the ring."
- ;; This could be more general to handle a prefix arg, but who would use it.
- (interactive)
- (isearch-ring-adjust 'advance))
-
-(defun isearch-ring-retreat ()
- "Retreat to the previous search string in the ring."
- (interactive)
- (isearch-ring-adjust nil))
-
-(defun isearch-ring-advance-edit (n)
- "Insert the next element of the search history into the minibuffer."
- (interactive "p")
- (let* ((yank-pointer-name (if isearch-regexp
- 'regexp-search-ring-yank-pointer
- 'search-ring-yank-pointer))
- (yank-pointer (eval yank-pointer-name))
- (ring (if isearch-regexp regexp-search-ring search-ring))
- (length (length ring)))
- (if (zerop length)
- ()
- (set yank-pointer-name
- (setq yank-pointer
- (mod (- (or yank-pointer 0) n)
- length)))
-
- (erase-buffer)
- (insert (nth yank-pointer ring))
- (goto-char (point-max)))))
-
-(defun isearch-ring-retreat-edit (n)
- "Inserts the previous element of the search history into the minibuffer."
- (interactive "p")
- (isearch-ring-advance-edit (- n)))
-
-;;(defun isearch-ring-adjust-edit (advance)
-;; "Use the next or previous search string in the ring while in minibuffer."
-;; (isearch-ring-adjust1 advance)
-;; (erase-buffer)
-;; (insert isearch-string))
-
-;;(defun isearch-ring-advance-edit ()
-;; (interactive)
-;; (isearch-ring-adjust-edit 'advance))
-
-;;(defun isearch-ring-retreat-edit ()
-;; "Retreat to the previous search string in the ring while in the minibuffer."
-;; (interactive)
-;; (isearch-ring-adjust-edit nil))
-
-
-(defun isearch-complete1 ()
- ;; Helper for isearch-complete and isearch-complete-edit
- ;; Return t if completion OK, nil if no completion exists.
- (let* ((ring (if isearch-regexp regexp-search-ring search-ring))
- (alist (mapcar (function (lambda (string) (list string))) ring))
- (completion-ignore-case case-fold-search)
- (completion (try-completion isearch-string alist)))
- (cond
- ((eq completion t)
- ;; isearch-string stays the same
- t)
- ((or completion ; not nil, must be a string
- (= 0 (length isearch-string))) ; shouldnt have to say this
- (if (equal completion isearch-string) ;; no extension?
- (if completion-auto-help
- (with-output-to-temp-buffer "*Isearch completions*"
- (display-completion-list
- (all-completions isearch-string alist))))
- (setq isearch-string completion))
- t)
- (t
- (message "No completion") ; waits a second if in minibuffer
- nil))))
-
-(defun isearch-complete ()
- "Complete the search string from the strings on the search ring.
-The completed string is then editable in the minibuffer.
-If there is no completion possible, say so and continue searching."
- (interactive)
- (if (isearch-complete1)
- (isearch-edit-string)
- ;; else
- (sit-for 1)
- (isearch-update)))
-
-(defun isearch-complete-edit ()
- "Same as `isearch-complete' except in the minibuffer."
- (interactive)
- (setq isearch-string (buffer-string))
- (if (isearch-complete1)
- (progn
- (erase-buffer)
- (insert isearch-string))))
-
-
-;;;==============================================================
-;; The search status stack (and isearch window-local variables, not used).
-;; Need a structure for this.
-
-(defun isearch-top-state ()
- (let ((cmd (car isearch-cmds)))
- (setq isearch-string (car cmd)
- isearch-message (car (cdr cmd))
- isearch-success (nth 3 cmd)
- isearch-forward (nth 4 cmd)
- isearch-other-end (nth 5 cmd)
- isearch-word (nth 6 cmd)
- isearch-invalid-regexp (nth 7 cmd)
- isearch-wrapped (nth 8 cmd)
- isearch-barrier (nth 9 cmd)
- isearch-within-brackets (nth 10 cmd)
- isearch-case-fold-search (nth 11 cmd))
- (goto-char (car (cdr (cdr cmd))))))
-
-(defun isearch-pop-state ()
- (setq isearch-cmds (cdr isearch-cmds))
- (isearch-top-state)
- )
-
-(defun isearch-push-state ()
- (setq isearch-cmds
- (cons (list isearch-string isearch-message (point)
- isearch-success isearch-forward isearch-other-end
- isearch-word
- isearch-invalid-regexp isearch-wrapped isearch-barrier
- isearch-within-brackets isearch-case-fold-search)
- isearch-cmds)))
-
-
-;;;==================================================================
-;; Message string
-
-(defun isearch-message (&optional c-q-hack ellipsis)
- ;; Generate and print the message string.
- (let ((cursor-in-echo-area ellipsis)
- (m (concat
- (isearch-message-prefix c-q-hack ellipsis isearch-nonincremental)
- isearch-message
- (isearch-message-suffix c-q-hack ellipsis)
- )))
- (if c-q-hack m (message "%s" m))))
-
-(defun isearch-message-prefix (&optional c-q-hack ellipsis nonincremental)
- ;; If about to search, and previous search regexp was invalid,
- ;; check that it still is. If it is valid now,
- ;; let the message we display while searching say that it is valid.
- (and isearch-invalid-regexp ellipsis
- (condition-case ()
- (progn (re-search-forward isearch-string (point) t)
- (setq isearch-invalid-regexp nil))
- (error nil)))
- ;; If currently failing, display no ellipsis.
- (or isearch-success (setq ellipsis nil))
- (let ((m (concat (if isearch-success "" "failing ")
- (if isearch-wrapped "wrapped ")
- (if isearch-word "word " "")
- (if isearch-regexp "regexp " "")
- (if nonincremental "search" "I-search")
- (if isearch-forward ": " " backward: ")
- )))
- (aset m 0 (upcase (aref m 0)))
- m))
-
-
-(defun isearch-message-suffix (&optional c-q-hack ellipsis)
- (concat (if c-q-hack "^Q" "")
- (if isearch-invalid-regexp
- (concat " [" isearch-invalid-regexp "]")
- "")))
-
-
-;;;========================================================
-;;; Searching
-
-(defun isearch-search ()
- ;; Do the search with the current search string.
- (isearch-message nil t)
- (if (and isearch-case-fold-search search-upper-case)
- (setq isearch-case-fold-search
- (isearch-no-upper-case-p isearch-string isearch-regexp)))
- (condition-case lossage
- (let ((inhibit-quit nil)
- (case-fold-search isearch-case-fold-search))
- (if isearch-regexp (setq isearch-invalid-regexp nil))
- (setq isearch-within-brackets nil)
- (setq isearch-success
- (funcall
- (cond (isearch-word
- (if isearch-forward
- 'word-search-forward 'word-search-backward))
- (isearch-regexp
- (if isearch-forward
- 're-search-forward 're-search-backward))
- (t
- (if isearch-forward 'search-forward 'search-backward)))
- isearch-string nil t))
- (if isearch-success
- (setq isearch-other-end
- (if isearch-forward (match-beginning 0) (match-end 0)))))
-
- (quit (isearch-unread ?\C-g)
- (setq isearch-success nil))
-
- (invalid-regexp
- (setq isearch-invalid-regexp (car (cdr lossage)))
- (setq isearch-within-brackets (string-match "\\`Unmatched \\["
- isearch-invalid-regexp))
- (if (string-match
- "\\`Premature \\|\\`Unmatched \\|\\`Invalid "
- isearch-invalid-regexp)
- (setq isearch-invalid-regexp "incomplete input")))
- (error
- ;; stack overflow in regexp search.
- (setq isearch-invalid-regexp (car (cdr lossage)))))
-
- (if isearch-success
- nil
- ;; Ding if failed this time after succeeding last time.
- (and (nth 3 (car isearch-cmds))
- (ding))
- (goto-char (nth 2 (car isearch-cmds)))))
-
-
-
-;;;========================================================
-;;; Highlighting
-
-(defvar isearch-overlay nil)
-
-(defun isearch-highlight (beg end)
- (if (or (null search-highlight) (null window-system))
- nil
- (or isearch-overlay (setq isearch-overlay (make-overlay beg end)))
- (move-overlay isearch-overlay beg end (current-buffer))
- (overlay-put isearch-overlay 'face
- (if (internal-find-face 'isearch nil)
- 'isearch 'region))))
-
-(defun isearch-dehighlight (totally)
- (if isearch-overlay
- (delete-overlay isearch-overlay)))
-
-;;;===========================================================
-;;; General utilities
-
-
-(defun isearch-no-upper-case-p (string regexp-flag)
- "Return t if there are no upper case chars in STRING.
-If REGEXP-FLAG is non-nil, disregard letters preceeded by `\\' (but not `\\\\')
-since they have special meaning in a regexp."
- (let ((case-fold-search nil))
- (not (string-match (if regexp-flag "\\(^\\|\\\\\\\\\\|[^\\]\\)[A-Z]"
- "[A-Z]")
- string))))
-
-
-;;;=================================================
-;; Portability functions to support various Emacs versions.
-
-;; To quiet the byte-compiler.
-(defvar unread-command-event)
-(defvar unread-command-events)
-(defvar last-command-event)
-
-(defun isearch-char-to-string (c)
- (if (integerp c)
- (make-string 1 c)
- (if (and (symbolp c) (get c 'ascii-character))
- (make-string 1 (get c 'ascii-character))
- (make-string 1 (event-to-character c)))))
-
-(defun isearch-text-char-description (c)
- (if (and (integerp c) (or (< c ?\ ) (= c ?\^?)))
- (text-char-description c)
- (isearch-char-to-string c)))
-
-(defun isearch-unread (&rest char-or-events)
- ;; General function to unread characters or events.
- (if isearch-gnu-emacs-events
- (setq unread-command-events
- (append char-or-events unread-command-events))
- (let ((char (if (cdr char-or-events)
- (progn
- (while (cdr char-or-events)
- (setq char-or-events (cdr char-or-events)))
- (+ 128 (car char-or-events)))
- (car char-or-events))))
- (if isearch-event-data-type
- (setq unread-command-event char)
- (setq unread-command-char char)))))
-
-(defun isearch-last-command-char ()
- ;; General function to return the last command character.
- (if isearch-event-data-type
- last-command-event
- last-command-char))
-
-;;; isearch.el ends here