root/trunk/lisp/international/isearch-x.el

;;; isearch-x.el --- extended isearch handling commands

;; Copyright (C) 1997, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008
;;   Free Software Foundation, Inc.
;; Copyright (C) 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004,
;;   2005, 2006, 2007, 2008
;;   National Institute of Advanced Industrial Science and Technology (AIST)
;;   Registration Number H14PRO021

;; Keywords: multilingual, isearch

;; Author: Kenichi HANDA <handa@etl.go.jp>
;; Maintainer: Kenichi HANDA <handa@etl.go.jp>

;; 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 3, 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, Inc., 51 Franklin Street, Fifth Floor,
;; Boston, MA 02110-1301, USA.

;;; Commentary:

;;; Code:

;;;###autoload
(defun isearch-toggle-specified-input-method ()
  "Select an input method and turn it on in interactive search."
  (interactive)
  (let ((overriding-terminal-local-map nil))
    (toggle-input-method t))
  (setq isearch-input-method-function input-method-function
        isearch-input-method-local-p t)
  (setq input-method-function nil)
  (isearch-update))

;;;###autoload
(defun isearch-toggle-input-method ()
  "Toggle input method in interactive search."
  (interactive)
  (let ((overriding-terminal-local-map nil))
    (toggle-input-method))
  (setq isearch-input-method-function input-method-function
        isearch-input-method-local-p t)
  (setq input-method-function nil)
  (isearch-update))

(defvar isearch-minibuffer-local-map
  (let ((map (copy-keymap minibuffer-local-map)))
    (define-key map [with-keyboard-coding] 'isearch-with-keyboard-coding)
    (define-key map [with-input-method] 'isearch-with-input-method)
    map)
  "Keymap to use in minibuffer for multibyte character inputting in isearch.")

;; Exit from recursive edit safely.  Set in `after-change-functions'
;; by isearch-with-keyboard-coding.
(defun isearch-exit-recursive-edit (start end length)
  (interactive)
  (throw 'exit nil))

;; Simulate character decoding by the keyboard coding system in the
;; current buffer (minibuffer).  As soon as a character is inserted,
;; it exits from minibuffer.

(defun isearch-with-keyboard-coding ()
  (interactive)
  (let ((after-change-functions '(isearch-exit-recursive-edit)))
    (recursive-edit))
  (exit-minibuffer))

;; Simulate the work of the current input method in the current buffer
;; (minibuffer).

(defun isearch-with-input-method ()
  (interactive)
  (let ((key (car unread-command-events))
        events)
    (setq unread-command-events (cdr unread-command-events)
          events (funcall input-method-function key))
    ;; EVENTS is a list of events the input method has generated.  It
    ;; contains a character event and/or the special event
    ;; `compose-last-chars'.  We extract only character events and
    ;; insert the corresponding characters.
    (while events
      (if (integerp (car events)) (insert (car events)))
      (setq events (cdr events)))
    (exit-minibuffer)))

;;;###autoload
(defun isearch-process-search-multibyte-characters (last-char)
  (if (eq this-command 'isearch-printing-char)
      (let ((overriding-terminal-local-map nil)
            (prompt (isearch-message-prefix))
            (minibuffer-local-map isearch-minibuffer-local-map)
            str junk-hist)

        ;; PROMPT contains text-properties from
        ;; `minibuffer-prompt-properties', and some of these can screw up
        ;; its use in `read-string' below (specifically, a read-only
        ;; property will cause it to signal an error), so strip them here;
        ;; read-string will add the same properties itself anyway.
        ;;
        (set-text-properties 0 (length prompt) nil prompt)

        (if isearch-input-method-function
            (let (;; Let input method work rather tersely.
                  (input-method-verbose-flag nil))
              (setq unread-command-events
                    (cons 'with-input-method
                          (cons last-char unread-command-events))
                    ;; Inherit current-input-method in a minibuffer.
                    str (read-string prompt isearch-message 'junk-hist nil t))
              (if (or (not str) (< (length str) (length isearch-message)))
                  ;; All inputs were deleted while the input method
                  ;; was working.
                  (setq str "")
                (setq str (substring str (length isearch-message)))
                (if (and (= (length str) 1)
                         (= (aref str 0) last-char)
                         (>= last-char 128))
                    ;; The input method couldn't handle LAST-CHAR.
                    (setq str nil)))))

        (if (and (not str) (keyboard-coding-system))
            (setq unread-command-events
                  (cons 'with-keyboard-coding
                        (cons last-char unread-command-events))
                  str (read-string prompt nil 'junk-hist)))

        (if (and str (> (length str) 0))
            (let ((unread-command-events nil))
              (isearch-process-search-string str str))
          (isearch-update)))
    (isearch-process-search-char last-char)))

;;; arch-tag: 1a90a6cf-2cb2-477a-814a-9ff895852822
;;; isearch-x.el ends here