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- ;; Incremental search minor mode.
- ;; Copyright (C) 1992 Free Software Foundation, Inc.
-
- ;; LCD Archive Entry:
- ;; isearch-mode|Daniel LaLiberte|liberte@cs.uiuc.edu|
- ;; A minor mode replacement for isearch.el.|
- ;; 1993-09-14|1.4|~/modes/isearch-mode.el.Z|
-
- ;; This file is not yet part of GNU Emacs, but it is based almost
- ;; entirely on isearch.el which is part of GNU Emacs.
-
- ;; GNU Emacs is distributed in the hope that it will be useful,
- ;; but WITHOUT ANY WARRANTY. No author or distributor
- ;; accepts responsibility to anyone for the consequences of using it
- ;; or for whether it serves any particular purpose or works at all,
- ;; unless he says so in writing. Refer to the GNU Emacs General Public
- ;; License for full details.
-
- ;; Everyone is granted permission to copy, modify and redistribute
- ;; GNU Emacs, but only under the conditions described in the
- ;; GNU Emacs General Public License. A copy of this license is
- ;; supposed to have been given to you along with GNU Emacs so you
- ;; can know your rights and responsibilities. It should be in a
- ;; file named COPYING. Among other things, the copyright notice
- ;; and this notice must be preserved on all copies.
-
- ;;;====================================================================
- ;; Instructions
-
- ;; Searching with isearch-mode.el should work just like isearch.el,
- ;; except it is done in a temporary minor mode that terminates when
- ;; you finish searching.
-
- ;; To use isearch-mode instead of the standard isearch.el, add the
- ;; following to your .emacs file. The standard key bindings to
- ;; isearch-forward, etc, will then use isearch-mode instead of
- ;; isearch.
-
- ;; (fset 'isearch 'isearch-mode)
- ;; (autoload 'isearch-mode "isearch-mode")
-
- ;; 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).
-
- ;; If any package you use invokes isearching non-interactively to get
- ;; the modal behavior described above, you must use the redefinitions
- ;; of isearch-forward, etc. found in this file instead of those in
- ;; loaddefs.el. The simplest way to ensure this is to just load
- ;; isearch-mode explicitly in your .emacs instead of using the above
- ;; fset and autoload.
-
- ;; (load "isearch-mode")
-
- ;; 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 commmand history.
- ;; - Think about incorporating query-replace.
- ;; - Hooks and options for failed search.
-
- ;;;====================================================================
- ;;; Change History
-
- ;;; $Header: /import/kaplan/kaplan/liberte/Isearch/RCS/isearch-mode.el,v 1.4 92/09/14 16:26:02 liberte Exp Locker: liberte $
- ;;; $Log: isearch-mode.el,v $
- ;;; 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.
-
-
-
- ;;;=========================================================================
- ;;; 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-frames-exist nil) ;; emacs 19
- (defconst isearch-pre-command-hook-exists (boundp 'pre-command-hook)) ;; lemacs
- (defconst isearch-events-exist nil) ;; lemacs
-
-
- ;;;=========================================================================
- ;;; The following, defined in loaddefs.el, are still used with isearch-mode.
-
- ;(defvar search-last-string ""
- ; "Last string search for by a search command.
- ;This does not include direct calls to the primitive search functions,
- ;and does not include searches that are aborted.")
-
- ;(defvar search-last-regexp ""
- ; "Last string searched for by a regexp search command.
- ;This does not include direct calls to the primitive search functions,
- ;and does not include searches that are aborted.")
-
- ;(defconst search-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.")
-
- ;(defconst 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-caps-disable-folding t
- "*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 prefixed with \\, for regexps.
- 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.")
-
- (defvar search-highlight nil
- "*Whether isearch and query-replace should highlight the text which
- currently matches the search-string.")
-
-
- (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
- "The tail of the search ring whose car is the last thing searched for.")
- (defvar regexp-search-ring-yank-pointer nil
- "The tail of the regular expression search ring whose car is the last
- thing searched for.")
-
- (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))
- (len (length map)))
-
- ;; Control chars, by default, end isearch mode transparently.
- (while (< i ?\ )
- (aset map i 'isearch-other-control-char)
- (setq i (1+ i)))
-
- ;; Printing chars extend the selection by default.
- ;; This assumes that all remaining chars are printable.
- (while (< i len)
- (aset map 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-return-char)
- ;; For version 19, RET (C-m) terminates search and LFD (C-j) matches eol.
- ;; We could make this conditional.
- (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 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)
-
- ;; You can reenable global keys by binding them locally to nil.
- ;; For the help char this doesnt work quite as expected because
- ;; isearch-mode is not a major mode. Also the echo area is not
- ;; restored after the help command while isearch-mode is
- ;; still active. Furthermore, we should not assume that the
- ;; help-command is on C-h. But here is how it would be done:
- ;; (define-key map "\C-h" nil)
-
- ;; 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.
- (define-key map (char-to-string meta-prefix-char) (make-keymap))
- (setq i 0)
- (while (< i (- len 128))
- (define-key map (char-to-string (+ 128 i)) ;; Needs to be generalized.
- 'isearch-other-meta-char)
- (setq i (1+ i)))
-
- (define-key map "\M-n" 'isearch-ring-advance)
- (define-key map "\M-p" 'isearch-ring-retreat)
- (define-key map "\M-\t" 'isearch-complete)
-
- ;; For emacs 19, switching frames should terminate isearch-mode
- (if isearch-frames-exist
- (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-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)
- (defvar isearch-old-local-map 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)
-
- ;;;===============================================================
- ;;; Entry points to isearch-mode.
- ;;; These four functions should replace those in loaddefs.el
- ;;; An alternative is to fset isearch-forward etc to isearch-mode,
- ;;; and look at this-command to set the options accordingly.
-
- (defun isearch-forward (&optional regexp-p)
- "\
- 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.
- Type \\[isearch-whitespace-chars] to match all whitespace chars in regexp.
- \\[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")
- (isearch-mode t (not (null regexp-p)) nil (not (interactive-p))))
-
- (defun isearch-forward-regexp (&optional regexp-p)
- "\
- 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)
- (isearch-mode t (null regexp-p) nil (not (interactive-p))))
-
- (defun isearch-backward (&optional regexp-p)
- "\
- Do incremental search backward.
- With a prefix argument, do a regular expression search instead.
- See \\[isearch-forward] for more information."
- (interactive)
- (isearch-mode nil (not (null regexp-p)) nil (not (interactive-p))))
-
- (defun isearch-backward-regexp (&optional regexp-p)
- "\
- 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)
- (isearch-mode nil (null regexp-p) nil (not (interactive-p))))
-
-
- (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-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)
- isearch-window-configuration (current-window-configuration)
- isearch-old-local-map (current-local-map))
- (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
-
- (isearch-push-state)
-
- (use-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 (recursive-edit))
- )
-
-
- ;;;====================================================
- ;; Some high level utilities. Others below.
-
- (defun isearch-update ()
- ;; Called after each command to update the display.
- (if (if isearch-events-exist
- (null unread-command-event)
- (< 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)))
- ))
- (setq ;; quit-flag nil not for isearch-mode
- isearch-adjusted nil
- isearch-yank-flag nil)
- )
-
-
- (defun isearch-done ()
- ;; Called by all commands that terminate isearch-mode.
- (use-local-map isearch-old-local-map)
- ;; (setq pre-command-hook isearch-old-pre-command-hook) ; for lemacs
- (isearch-dehighlight t)
- (let ((found-start (window-start (selected-window)))
- (found-point (point)))
- (set-window-configuration isearch-window-configuration)
-
- ;; If there was movement, mark the starting position.
- ;; Maybe should test difference between and set mark iff > threshold.
- (if (/= (point) isearch-opoint)
- (push-mark isearch-opoint)
- ;; (message "") why is this needed?
- )
- (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)))
-
- (setq isearch-mode nil)
- (set-buffer-modified-p (buffer-modified-p)) ;; update modeline
-
- (if (> (length isearch-string) 0)
- ;; Update the ring data.
- (if isearch-regexp
- (if (not (setq regexp-search-ring-yank-pointer
- ;; really need equal test instead of eq.
- (isearch-member-equal
- isearch-string regexp-search-ring)))
- (progn
- (setq regexp-search-ring
- (cons isearch-string regexp-search-ring)
- regexp-search-ring-yank-pointer regexp-search-ring)
- (if (> (length regexp-search-ring) regexp-search-ring-max)
- (setcdr (nthcdr (1- search-ring-max) regexp-search-ring)
- nil))))
- (if (not (setq search-ring-yank-pointer
- ;; really need equal test instead of eq.
- (isearch-member-equal isearch-string search-ring)))
- (progn
- (setq search-ring (cons isearch-string search-ring)
- search-ring-yank-pointer 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 varient 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)
- (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 previou 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 doesnt back up the search point. Should it?
- (interactive)
- (condition-case err
- (let ((minibuffer-local-map minibuffer-local-isearch-map)
- isearch-nonincremental ; should search nonincrementally?
-
- ;; 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-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)
- (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 (if isearch-events-exist (allocate-event)
- (let ((cursor-in-echo-area t))
- (read-char))))
- ;; 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
- (char-to-string
- (if isearch-events-exist
- (or (event-to-character (next-command-event e)) 0)
- e))))
- (setq isearch-word t ;; so message-prefix is right
- isearch-new-word t)
- (isearch-unread e))
- (setq isearch-new-string (read-string (isearch-message-prefix)
- isearch-string)
- 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 (if isearch-regexp search-last-regexp
- search-last-string))
- ;; Set last search string now so it is set even if we fail.
- (if search-last-regexp
- (setq search-last-regexp isearch-string)
- (setq search-last-string isearch-string)))
-
- ;; 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 quiting
- (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) ; exit isearch
- (signal 'quit '(isearch))) ; 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
- (if regexp-search-ring-yank-pointer
- (car regexp-search-ring-yank-pointer)
- (car regexp-search-ring))
- (if search-ring-yank-pointer
- (car search-ring-yank-pointer)
- (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.
- (setq isearch-success t)
- (or (equal isearch-string "")
- (progn
- ;; If repeating a search that found
- ;; an empty string, ensure we advance.
- (if (equal (match-end 0) (match-beginning 0))
- (forward-char (if isearch-forward 1 -1)))
- (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
- (let ((string (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-caps-disable-folding))
- (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-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-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)))
-
-
- (defun isearch-other-control-char ()
- "Any other control char => unread it and exit the search normally.
- 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 control char is unread so that it is applied to the editing."
- (interactive)
- (cond
- ((eq search-exit-option 'edit)
- (isearch-unread (isearch-last-command-char))
- (isearch-edit-string))
- (search-exit-option ;; any other non-nil value
- (isearch-unread (isearch-last-command-char))
- (isearch-done))
- (t ;; search-exit-option is nil
- (isearch-process-search-char (isearch-last-command-char)))
- ))
-
-
- (defun isearch-other-meta-char ()
- "Any other meta char => exit the search normally and reexecute the whole key.
- But only if `search-exit-option' is non-nil."
- ;; This will probably work in place of isearch-other-control-char too,
- ;; but here we use unwind-protect and command-execute since it is
- ;; a multi-char key we would want to unread.
- (interactive)
- (cond
- (search-exit-option
- (unwind-protect
- ;; Exit recursive edit and restore the outside keymap.
- (isearch-done)
- ;; Reexecute the key with the outside keymap.
- ;; Note: this doesnt work unless the entered key is the same
- ;; as some outside key since command-execute only takes whole keys.
- ;; So three character keys typically will not work!
- ;; Also, executing the command here may not work if isearch was
- ;; invoked non-interactively, since other input may be expected.
- ;; We also can't do isearch-edit-string as in -other-control-char.
- ;; because we need to set unread-command-key, if that existed.
- ;; So a new unread-command-key would solve all these problems.
- (command-execute (this-command-keys))))
- (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 ()
- "Any other printing character => add it 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 not in regexp mode, activate word search."
- (interactive)
- (if isearch-regexp
- (if search-whitespace-regexp
- (isearch-process-search-string search-whitespace-regexp " ")
- (isearch-printing-char))
- (progn
- ;; This way of doing word search doesnt 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
- (nthcdr (% (+ (- length (length yank-pointer))
- (if advance (1- length) 1))
- length) ring)))
- (setq isearch-string (car yank-pointer)
- 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-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))
- (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-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 search-caps-disable-folding
- (setq isearch-case-fold-search (isearch-no-upper-case-p isearch-string)))
- (condition-case lossage
- (let ((inhibit-quit nil)
- (case-fold-search isearch-case-fold-search))
- (if isearch-regexp (setq isearch-invalid-regexp 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)))
- (if (string-match
- "\\`Premature \\|\\`Unmatched \\|\\`Invalid "
- isearch-invalid-regexp)
- (setq isearch-invalid-regexp "incomplete input"))))
-
- (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
-
- (defun isearch-highlight (begin end))
- (defun isearch-dehighlight (totally))
-
- ;; lemacs uses faces
- '(progn
- (defvar isearch-extent nil)
-
- (or (find-face 'isearch) ;; this face is initialized by x-faces.el
- (make-face 'isearch)) ;; since isearch is preloaded
-
- (defun isearch-lemacs-highlight (begin end)
- (if (null isearch-highlight)
- nil
- (if (and (extentp isearch-extent)
- (eq (extent-buffer isearch-extent) (current-buffer)))
- (set-extent-endpoints isearch-extent begin end)
- (if (and (extentp isearch-extent)
- (bufferp (extent-buffer isearch-extent))
- (buffer-name (extent-buffer isearch-extent)))
- (delete-extent isearch-extent))
- (setq isearch-extent (make-extent begin end (current-buffer))))
- (set-extent-face isearch-extent 'isearch)))
-
- (defun isearch-lemacs-dehighlight (totally)
- (if (and isearch-highlight isearch-extent)
- (if totally
- (let ((inhibit-quit t))
- (if (and (extentp isearch-extent)
- (bufferp (extent-buffer isearch-extent))
- (buffer-name (extent-buffer isearch-extent)))
- (delete-extent isearch-extent))
- (setq isearch-extent nil))
- (if (and (extentp isearch-extent)
- (bufferp (extent-buffer isearch-extent))
- (buffer-name (extent-buffer isearch-extent)))
- (set-extent-face isearch-extent 'default)
- (isearch-dehighlight t)))))
-
- (fset 'isearch-highlight (symbol-function 'isearch-lemacs-highlight))
- (fset 'isearch-dehighlight (symbol-function 'isearch-lemacs-dehighlight))
- )
-
- ;;;===========================================================
- ;;; General utilities
-
- ;; (fset 'isearch-member-equal (symbol-function 'member)) ; for emacs 19
-
- (defun isearch-member-equal (item list)
- "Return non-nil if ITEM is `equal' to some item in LIST.
- Actually return the list whose car is that item."
- (while (and list (not (equal item (car list))))
- (setq list (cdr list)))
- list)
-
-
- (defun isearch-no-upper-case-p (string)
- "Return t if there are no upper case chars in string.
- But upper case chars preceeded by \\ (but not \\\\) do not count since they
- have special meaning in a regexp."
- (let ((case-fold-search nil))
- (not (string-match "\\(^\\|\\\\\\\\\\|[^\\]\\)[A-Z]" string))))
-
-
- ;;;=================================================
- ;;; Special functions for lemacs events.
-
- ;; To quiet the byte-compiler.
- (defvar unread-command-event)
- (defvar last-command-event)
-
- (defun isearch-char-to-string (c)
- (if (integerp c)
- (make-string 1 c)
- (make-string 1 (event-to-character c))))
-
- (defun isearch-text-char-description (c)
- (isearch-char-to-string c))
-
- (defun isearch-unread (char-or-event)
- ;; General function to unread a character or event.
- (if isearch-events-exist
- (setq unread-command-event char-or-event)
- (setq unread-command-char char-or-event)))
-
- (defun isearch-last-command-char ()
- ;; General function to return the last command character.
- (if isearch-events-exist
- last-command-event
- last-command-char))
-
-
-
-
- ;;;========================================================
- ;;; Exiting in lemacs
-
- ;; This is a large amount of code to support automatic termination of
- ;; isearch-mode when a command (however it is invoked) is not an
- ;; isearch command, or the buffer is switched out from under
- ;; isearch-mode. Only later versions of lemacs have the pre-command-hook.
-
- (if isearch-pre-command-hook-exists
- (progn
-
- ;; This list must be modified whenever the available commands are modified.
- (mapcar (function (lambda (command)
- (put command 'isearch-command t)))
- '(isearch-printing-char
- isearch-return-char
- isearch-repeat-forward
- isearch-repeat-backward
- isearch-delete-char
- isearch-abort
- isearch-quote-char
- isearch-exit
- isearch-printing-char
- isearch-printing-char
- isearch-yank-word
- isearch-yank-line
- isearch-*-char
- isearch-*-char
- isearch-|-char
- isearch-toggle-regexp
- isearch-edit-string
- isearch-mode-help
- isearch-ring-advance
- isearch-ring-retreat
- isearch-ring-advance-edit
- isearch-ring-retreat-edit
- isearch-whitespace-chars
- isearch-complete
- isearch-complete-edit
- isearch-edit-string
- isearch-toggle-regexp
- ;; The following may not be needed since isearch-mode is off already.
- isearch-forward-exit-minibuffer
- isearch-reverse-exit-minibuffer
- isearch-nonincremental-exit-minibuffer))
-
- (defun isearch-pre-command-hook ()
- ;;
- ;; For use as the value of `pre-command-hook' when isearch-mode is active.
- ;; If the command about to be executed is not one of the isearch commands,
- ;; then isearch-mode is turned off before that command is executed.
- ;;
- ;; If the command about to be executed is self-insert-command, or is a
- ;; keyboard macro of a single key sequence which is bound to self-insert-
- ;; command, then we add those chars to the search ring instead of inserting
- ;; them in the buffer. In this way, the set of self-searching characters
- ;; need not be exhaustively enumerated, but is derived from other maps.
- ;;
- (isearch-maybe-frob-keyboard-macros)
- (if (and (symbolp this-command)
- (get this-command 'isearch-command))
- nil
- (isearch-done)))
-
- (defun isearch-maybe-frob-keyboard-macros ()
- ;;
- ;; If the command about to be executed is `self-insert-command' then change
- ;; the command to `isearch-printing-char' instead, meaning add the last-
- ;; typed character to the search string.
- ;;
- ;; If `this-command' is a string or a vector (that is, a keyboard macro)
- ;; and it contains only one command, which is bound to self-insert-command,
- ;; then do the same thing as for self-inserting commands: arrange for that
- ;; character to be added to the search string. If we didn't do this, then
- ;; typing a compose sequence (a la x-compose.el) would terminate the search
- ;; and insert the character, instead of searching for that character.
- ;;
- (cond ((eq this-command 'self-insert-command)
- (setq this-command 'isearch-printing-char))
- ((and (stringp this-command)
- (eq (key-binding this-command) 'self-insert-command))
- (setq last-command-char (aref this-command 0)
- last-command-event (character-to-event last-command-char)
- this-command 'isearch-printing-char))
- ((and (vectorp this-command)
- (eq (key-binding this-command) 'self-insert-command))
- (let* ((desc (aref this-command 0))
- (code (cond ((integerp desc) desc)
- ((symbolp desc) (get desc character-set-property))
- ((consp desc)
- (and (null (cdr desc))
- (get (car desc) character-set-property)))
- (t nil))))
- (if code
- (setq last-command-char code
- last-command-event (character-to-event last-command-char)
- this-command 'isearch-printing-char))))
- ))
-
- ))
-