Commit | Line | Data |
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e8af40ee | 1 | ;;; double.el --- support for keyboard remapping with double clicking |
fc429cfe | 2 | |
acaf905b | 3 | ;; Copyright (C) 1994, 1997-1998, 2001-2012 Free Software Foundation, Inc. |
fc429cfe | 4 | |
3efc86ef | 5 | ;; Author: Per Abrahamsen <abraham@dina.kvl.dk> |
fc429cfe | 6 | ;; Keywords: i18n |
fc429cfe | 7 | |
70d949ea RS |
8 | ;; This file is part of GNU Emacs. |
9 | ||
eb3fa2cf | 10 | ;; GNU Emacs is free software: you can redistribute it and/or modify |
fc429cfe | 11 | ;; it under the terms of the GNU General Public License as published by |
eb3fa2cf GM |
12 | ;; the Free Software Foundation, either version 3 of the License, or |
13 | ;; (at your option) any later version. | |
70d949ea RS |
14 | |
15 | ;; GNU Emacs is distributed in the hope that it will be useful, | |
fc429cfe RS |
16 | ;; but WITHOUT ANY WARRANTY; without even the implied warranty of |
17 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | ;; GNU General Public License for more details. | |
70d949ea | 19 | |
fc429cfe | 20 | ;; You should have received a copy of the GNU General Public License |
eb3fa2cf | 21 | ;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. |
fc429cfe RS |
22 | |
23 | ;;; Commentary: | |
24 | ||
25 | ;; This mode is intended for use with languages that adds a small | |
26 | ;; number of extra letters not available on the keyboard. | |
71296446 | 27 | ;; |
fc429cfe RS |
28 | ;; Examples includes Scandinavian and German with an US keyboard. |
29 | ;; | |
30 | ;; The idea is that certain keys are overloaded. When you press it | |
31 | ;; once it will insert one string, and when you press it twice the | |
32 | ;; string will be replaced by another. This can be used for mapping | |
33 | ;; keys on a US keyboard to generate characters according to the local | |
34 | ;; keyboard convention when pressed once, and according to US keyboard | |
71296446 | 35 | ;; convention when pressed twice. |
fc429cfe RS |
36 | ;; |
37 | ;; To use this mode, you must define the variable `double-map' and | |
38 | ;; then enable double mode with `M-x double-mode'. Read the | |
39 | ;; documentation for both of them. | |
40 | ;; | |
41 | ;; The default mapping is for getting Danish/Norwegian keyboard layout | |
42 | ;; using ISO Latin 1 on a US keyboard. | |
43 | ;; | |
a7acbbe4 | 44 | ;; Important node: While I would like to hear comments, bug reports, |
fc429cfe | 45 | ;; suggestions, please do @strong{not} expect me to put other mappings |
a7acbbe4 | 46 | ;; than the default into this file. There are billions and billions |
fc429cfe RS |
47 | ;; of such mappings, and just supporting the most common would |
48 | ;; increase the size of this nice small file manyfold. | |
49 | ||
fc429cfe RS |
50 | ;;; Code: |
51 | ||
7b33b170 KH |
52 | (defgroup double nil |
53 | "Remap keyboard, but get original by typing the same key twice." | |
54 | :group 'i18n) | |
55 | ||
56 | (defcustom double-map | |
fc429cfe RS |
57 | '((?\; "\346" ";") |
58 | (?\' "\370" "'") | |
59 | (?\[ "\345" "[") | |
60 | (?\: "\306" ":") | |
61 | (?\" "\330" "\"") | |
62 | (?\{ "\305" "{")) | |
63 | "Alist of key translations activated by double mode. | |
64 | ||
65 | Each entry is a list with three elements: | |
66 | 1. The key activating the translation. | |
67 | 2. The string to be inserted when the key is pressed once. | |
7b33b170 KH |
68 | 3. The string to be inserted when the key is pressed twice." |
69 | :group 'double | |
70 | :type '(repeat (list (character :tag "Key") | |
71 | (string :tag "Once") | |
72 | (string :tag "Twice")))) | |
fc429cfe | 73 | |
7b33b170 | 74 | (defcustom double-prefix-only t |
c46f60a8 | 75 | "Non-nil means that Double mode mapping only works for prefix keys. |
8a3663f3 | 76 | That is, for any key `X' in `double-map', `X' alone will be mapped |
7b33b170 KH |
77 | but not `C-u X' or `ESC X' since the X is not the prefix key." |
78 | :group 'double | |
79 | :type 'boolean) | |
5867a409 | 80 | |
fc429cfe RS |
81 | ;;; Read Event |
82 | ||
83 | (defvar double-last-event nil) | |
84 | ;; The last key that generated a double key event. | |
85 | ||
86 | (defun double-read-event (prompt) | |
87 | ;; Read an event | |
88 | (if isearch-mode (isearch-update)) | |
89 | (if prompt | |
90 | (prog2 (message "%s%c" prompt double-last-event) | |
91 | (read-event) | |
92 | (message "")) | |
93 | (read-event))) | |
94 | ||
c46f60a8 | 95 | (global-set-key [ignore] 'ignore) |
fc429cfe RS |
96 | |
97 | (or (boundp 'isearch-mode-map) | |
98 | (load-library "isearch")) | |
99 | ||
71296446 | 100 | (define-key isearch-mode-map [ignore] |
fc429cfe RS |
101 | (function (lambda () (interactive) (isearch-update)))) |
102 | ||
103 | (defun double-translate-key (prompt) | |
104 | ;; Translate input events using double map. | |
1e4bd40d | 105 | (let ((key last-input-event)) |
fc429cfe RS |
106 | (cond (unread-command-events |
107 | ;; Artificial event, ignore it. | |
108 | (vector key)) | |
5867a409 RS |
109 | ((and double-prefix-only |
110 | (> (length (this-command-keys)) 1)) | |
111 | ;; This is not a prefix key, ignore it. | |
112 | (vector key)) | |
fc429cfe RS |
113 | ((eq key 'magic-start) |
114 | ;; End of generated event. See if he will repeat it... | |
115 | (let ((new (double-read-event prompt)) | |
116 | (entry (assoc double-last-event double-map))) | |
18d2b950 | 117 | (force-window-update (selected-window)) |
fc429cfe | 118 | (if (eq new double-last-event) |
71296446 | 119 | (progn |
fc429cfe RS |
120 | (setq unread-command-events |
121 | (append (make-list (1- (length (nth 1 entry))) | |
f55e5c6b | 122 | 127) |
fc429cfe RS |
123 | (nth 2 entry) |
124 | '(magic-end))) | |
125 | (vector 127)) | |
126 | (setq unread-command-events (list new)) | |
f55e5c6b | 127 | [ignore]))) |
fc429cfe RS |
128 | ((eq key 'magic-end) |
129 | ;; End of double event. Ignore. | |
f55e5c6b | 130 | [ignore]) |
fc429cfe RS |
131 | (t |
132 | ;; New key. | |
133 | (let ((exp (nth 1 (assoc key double-map)))) | |
134 | (setq double-last-event key) | |
135 | (setq unread-command-events | |
136 | (append (substring exp 1) '(magic-start))) | |
137 | (vector (aref exp 0))))))) | |
138 | ||
fc429cfe RS |
139 | ;;; Mode |
140 | ||
48a0ae63 | 141 | ;; This feature seemed useless and it confused describe-mode, |
c46f60a8 SM |
142 | ;; so I deleted it. |
143 | ;; (defvar double-mode-name "Double") | |
144 | ;; ;; Name of current double mode. | |
145 | ;; (make-variable-buffer-local 'double-mode-name) | |
fc429cfe RS |
146 | |
147 | ;;;###autoload | |
c46f60a8 | 148 | (define-minor-mode double-mode |
06e21633 CY |
149 | "Toggle special insertion on double keypresses (Double mode). |
150 | With a prefix argument ARG, enable Double mode if ARG is | |
151 | positive, and disable it otherwise. If called from Lisp, enable | |
152 | the mode if ARG is omitted or nil. | |
fc429cfe | 153 | |
06e21633 CY |
154 | When Double mode is enabled, some keys will insert different |
155 | strings when pressed twice. See `double-map' for details." | |
c46f60a8 SM |
156 | :lighter " Double" |
157 | :link '(emacs-commentary-link "double") | |
158 | (kill-local-variable 'key-translation-map) | |
159 | (when double-mode | |
160 | ;; Set up key-translation-map as indicated by `double-map'. | |
161 | ;; XXX I don't think key-translation-map should be made local here. -- Lorentey | |
162 | (make-local-variable 'key-translation-map) | |
163 | (let ((map (make-sparse-keymap))) | |
164 | (set-keymap-parent map key-translation-map) | |
165 | (setq key-translation-map map) | |
166 | (dolist (entry (append double-map '((magic-start) (magic-end)))) | |
167 | (define-key map | |
168 | (vector (nth 0 entry)) 'double-translate-key))))) | |
fc429cfe RS |
169 | |
170 | (provide 'double) | |
171 | ||
172 | ;;; double.el ends here |