code.delx.au - gnu-emacs/blob - 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
  60 ;; These two variables are used to refer to the values of
  61 ;; `current-input-method' and `input-method-function' of the original
  62 ;; buffer in the function isearch-with-input-method which runs in a
  63 ;; minibuffer.
  64
  65 (defvar isearch-minibuffer-input-method nil)
  66 (defvar isearch-minibuffer-input-method-function nil)
  67
  68 ;; Exit from recursive edit safely.  Set in `after-change-functions'
  69 ;; by isearch-with-keyboard-coding.
  70 (defun isearch-exit-recursive-edit ()
  71   (interactive)
  72   (throw 'exit nil))
  73
  74 ;; Simulate character decoding by the keyboard coding system in the
  75 ;; current buffer (minibuffer).  As soon as a character is inserted,
  76 ;; it exits from minibuffer.
  77
  78 (defun isearch-with-keyboard-coding ()
  79   (interactive)
  80   (let ((after-change-functions '(isearch-exit-recursive-edit)))
  81     (recursive-edit))
  82   (exit-minibuffer))
  83
  84 ;; Simulate the work of the current input method in the current buffer
  85 ;; (minibuffer).
  86
  87 (defun isearch-with-input-method ()
  88   (interactive)
  89   (let* ((current-input-method isearch-minibuffer-input-method)
  90          (events (funcall isearch-minibuffer-input-method-function nil)))
  91     ;; EVENTS is a list of events the input method has generated.  It
  92     ;; contains a character event and/or the special event
  93     ;; `compose-last-chars'.  We extract only character events and
  94     ;; insert the corresponding characters.
  95     (while events
  96       (if (integerp (car events)) (insert (car events)))
  97       (setq events (cdr events)))
  98     (exit-minibuffer)))
  99
 100 ;;;###autoload
 101 (defun isearch-process-search-multibyte-characters (last-char)
 102   (if (eq this-command 'isearch-printing-char)
 103       (let ((overriding-terminal-local-map nil)
 104             (prompt (concat (isearch-message-prefix) isearch-message))
 105             (minibuffer-local-map isearch-minibuffer-local-map)
 106             str)
 107         (if isearch-input-method-function
 108             (let (;; Let input method work rather tersely.
 109                   (input-method-verbose-flag nil)
 110                   (isearch-minibuffer-input-method current-input-method)
 111                   (isearch-minibuffer-input-method-function
 112                    isearch-input-method-function))
 113               (setq unread-command-events
 114                     (cons 'with-input-method
 115                           (cons last-char unread-command-events))
 116                     str (read-string prompt))
 117               (if (not str)
 118                   ;; All inputs were deleted while the input method
 119                   ;; was working.
 120                   (setq str "")
 121                 (if (and (= (length str) 1)
 122                          (= (aref str 0) last-char))
 123                     ;; The input method couldn't handle LAST-CHAR.
 124                     (setq str nil)))))
 125
 126         (if (and (not str) (keyboard-coding-system))
 127             (setq unread-command-events
 128                   (cons 'with-keyboard-coding
 129                         (cons last-char unread-command-events))
 130                   str (read-string prompt)))
 131
 132         (if (and str (> (length str) 0))
 133             (let ((unread-command-events nil))
 134               (isearch-process-search-string str str))
 135           (isearch-update)))
 136     (isearch-process-search-char last-char)))
 137
 138 ;;; isearch-x.el ends here