lisp/international/isearch-x.el

   1 ;;; isearch-x.el --- extended isearch handling commands
   2
   3 ;; Copyright (C) 1995 Electrotechnical Laboratory, JAPAN.
   4 ;; Licensed to the Free Software Foundation.
   5
   6 ;; Keywords: multilingual, isearch
   7
   8 ;; Author: Kenichi HANDA <handa@etl.go.jp>
   9 ;; Maintainer: Kenichi HANDA <handa@etl.go.jp>
  10
  11 ;; This file is part of GNU Emacs.
  12
  13 ;; GNU Emacs is free software; you can redistribute it and/or modify
  14 ;; it under the terms of the GNU General Public License as published by
  15 ;; the Free Software Foundation; either version 2, or (at your option)
  16 ;; any later version.
  17
  18 ;; GNU Emacs is distributed in the hope that it will be useful,
  19 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  20 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21 ;; GNU General Public License for more details.
  22
  23 ;; You should have received a copy of the GNU General Public License
  24 ;; along with GNU Emacs; see the file COPYING.  If not, write to the
  25 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  26 ;; Boston, MA 02111-1307, USA.
  27
  28 ;;; Code:
  29
  30 ;;;###autoload
  31 (defun isearch-toggle-specified-input-method ()
  32   "Select an input method and turn it on in interactive search."
  33   (interactive)
  34   (let ((overriding-terminal-local-map nil))
  35     (toggle-input-method t))
  36   (setq isearch-input-method-function input-method-function
  37         isearch-input-method-local-p t)
  38   (setq input-method-function nil)
  39   (isearch-update))
  40
  41 ;;;###autoload
  42 (defun isearch-toggle-input-method ()
  43   "Toggle input method in interactive search."
  44   (interactive)
  45   (let ((overriding-terminal-local-map nil))
  46     (toggle-input-method))
  47   (setq isearch-input-method-function input-method-function
  48         isearch-input-method-local-p t)
  49   (setq input-method-function nil)
  50   (isearch-update))
  51
  52 (defvar isearch-minibuffer-local-map
  53   (let ((map (copy-keymap minibuffer-local-map)))
  54     (define-key map [with-keyboard-coding] 'isearch-with-keyboard-coding)
  55     (define-key map [with-input-method] 'isearch-with-input-method)
  56     map)
  57   "Keymap to use in minibuffer for multibyte character inputting in isearch.")
  58
  59 ;; Exit from recursive edit safely.  Set in `after-change-functions'
  60 ;; by isearch-with-keyboard-coding.
  61 (defun isearch-exit-recursive-edit ()
  62   (interactive)
  63   (throw 'exit nil))
  64
  65 ;; Simulate character decoding by the keyboard coding system in the
  66 ;; current buffer (minibuffer).  As soon as a character is inserted,
  67 ;; it exits from minibuffer.
  68
  69 (defun isearch-with-keyboard-coding ()
  70   (interactive)
  71   (let ((after-change-functions '(isearch-exit-recursive-edit)))
  72     (recursive-edit))
  73   (exit-minibuffer))
  74
  75 ;; Simulate the work of the current input method in the current buffer
  76 ;; (minibuffer).
  77
  78 (defun isearch-with-input-method ()
  79   (interactive)
  80   (let ((key (car unread-command-events))
  81         events)
  82     (setq unread-command-events (cdr unread-command-events)
  83           events (funcall input-method-function key))
  84     ;; EVENTS is a list of events the input method has generated.  It
  85     ;; contains a character event and/or the special event
  86     ;; `compose-last-chars'.  We extract only character events and
  87     ;; insert the corresponding characters.
  88     (while events
  89       (if (integerp (car events)) (insert (car events)))
  90       (setq events (cdr events)))
  91     (exit-minibuffer)))
  92
  93 ;;;###autoload
  94 (defun isearch-process-search-multibyte-characters (last-char)
  95   (if (eq this-command 'isearch-printing-char)
  96       (let ((overriding-terminal-local-map nil)
  97             (prompt (concat (isearch-message-prefix) isearch-message))
  98             (minibuffer-local-map isearch-minibuffer-local-map)
  99             str)
 100         (if isearch-input-method-function
 101             (let (;; Let input method work rather tersely.
 102                   (input-method-verbose-flag nil))
 103               (setq unread-command-events
 104                     (cons 'with-input-method
 105                           (cons last-char unread-command-events))
 106                     ;; Inherit current-input-method in a minibuffer.
 107                     str (read-string prompt nil nil nil t))
 108               (if (not str)
 109                   ;; All inputs were deleted while the input method
 110                   ;; was working.
 111                   (setq str "")
 112                 (if (and (= (length str) 1)
 113                          (= (aref str 0) last-char)
 114                          (>= last-char 128))
 115                     ;; The input method couldn't handle LAST-CHAR.
 116                     (setq str nil)))))
 117
 118         (if (and (not str) (keyboard-coding-system))
 119             (setq unread-command-events
 120                   (cons 'with-keyboard-coding
 121                         (cons last-char unread-command-events))
 122                   str (read-string prompt)))
 123
 124         (if (and str (> (length str) 0))
 125             (let ((unread-command-events nil))
 126               (isearch-process-search-string str str))
 127           (isearch-update)))
 128     (isearch-process-search-char last-char)))
 129
 130 ;;; isearch-x.el ends here