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7115232b DL |
1 | ;;; uni-input.el --- Hex Unicode input method |
2 | ||
ccb93d40 | 3 | ;; Copyright (C) 2001, 2003, 2006 Free Software Foundation, Inc. |
698218a2 KH |
4 | ;; Copyright (C) 2004 |
5 | ;; National Institute of Advanced Industrial Science and Technology (AIST) | |
6 | ;; Registration Number H14PRO021 | |
7115232b DL |
7 | |
8 | ;; Author: Dave Love <fx@gnu.org> | |
9 | ;; Keywords: i18n | |
10 | ||
041f4d74 PJ |
11 | ;; This file is part of GNU Emacs. |
12 | ||
7115232b DL |
13 | ;; This file 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 | ;; This file 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 | |
364c38d3 LK |
25 | ;; the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
26 | ;; Boston, MA 02110-1301, USA. | |
7115232b DL |
27 | |
28 | ;;; Commentary: | |
29 | ||
30 | ;; Provides an input method for entering characters by hex unicode in | |
31 | ;; the form `uxxxx', similarly to the Yudit editor. | |
32 | ||
33 | ;; This is not really a Quail method, but uses some Quail functions. | |
34 | ;; There is probably A Better Way. | |
35 | ||
36 | ;; Compare `ucs-insert', which explicitly inserts a unicoded character | |
37 | ;; rather than supplying an input method. | |
38 | ||
39 | ;;; Code: | |
40 | ||
41 | (require 'quail) | |
42 | ||
43 | ;; Maybe stolen from Mule-UCS -- I don't remember. | |
44 | (define-ccl-program utf-8-ccl-encode | |
45 | `(4 (if (r0 < ?\x80) | |
46 | ((write r0)) | |
47 | (if (r0 < #x800) | |
48 | ((write ((r0 >> 6) | ?\xC0)) | |
49 | (write ((r0 & ?\x3F) | ?\x80))) | |
50 | (if (r0 < #x10000) | |
51 | ((write ((r0 >> 12) | ?\xE0)) | |
52 | (write (((r0 >> 6) & ?\x3F) | ?\x80)) | |
53 | (write ((r0 & ?\x3F) | ?\x80))) | |
54 | (if (r0 < #x200000) | |
55 | ((write ((r0 >> 18) | ?\xF0)) | |
83930535 | 56 | (write (((r0 >> 12) & ?\x3F) | ?\x80)) |
7115232b DL |
57 | (write (((r0 >> 6) & ?\x3F) | ?\x80)) |
58 | (write ((r0 & ?\x3F) | ?\x80))) | |
59 | (if (r0 < #x4000000) | |
60 | ((write ((r0 >> 24) | ?\xF8)) | |
61 | (write (((r0 >> 18) & ?\x3F) | ?\x80)) | |
62 | (write (((r0 >> 12) & ?\x3F) | ?\x80)) | |
63 | (write (((r0 >> 6) & ?\x3F) | ?\x80)) | |
83930535 | 64 | (write ((r0 & ?\x3F) | ?\x80))) |
7115232b DL |
65 | ((write ((r0 >> 30) | ?\xFC)) |
66 | (write (((r0 >> 24) & ?\x3F) | ?\x80)) | |
67 | (write (((r0 >> 18) & ?\x3F) | ?\x80)) | |
68 | (write (((r0 >> 12) & ?\x3F) | ?\x80)) | |
69 | (write (((r0 >> 6) & ?\x3F) | ?\x80)) | |
83930535 | 70 | (write ((r0 & ?\x3F) | ?\x80)))))))))) |
7115232b | 71 | |
ad7d24c4 KH |
72 | (defun ucs-input-insert-char (char) |
73 | (insert char) | |
74 | (move-overlay quail-overlay (overlay-start quail-overlay) (point))) | |
75 | ||
7115232b DL |
76 | (defun ucs-input-method (key) |
77 | (if (or buffer-read-only | |
78 | (and (/= key ?U) (/= key ?u))) | |
79 | (list key) | |
80 | (quail-setup-overlays nil) | |
ad7d24c4 | 81 | (ucs-input-insert-char key) |
7115232b DL |
82 | (let ((modified-p (buffer-modified-p)) |
83 | (buffer-undo-list t) | |
84 | (input-method-function nil) | |
85 | (echo-keystrokes 0) | |
86 | (help-char nil) | |
87 | (events (list key)) | |
88 | (str " ")) | |
89 | (unwind-protect | |
90 | (catch 'non-digit | |
91 | (progn | |
92 | (dotimes (i 4) | |
93 | (let ((seq (read-key-sequence nil)) | |
94 | key) | |
95 | (if (and (stringp seq) | |
96 | (= 1 (length seq)) | |
97 | (setq key (aref seq 0)) | |
98 | (memq key '(?0 ?1 ?2 ?3 ?4 ?5 ?6 ?7 ?8 ?9 ?a | |
99 | ?b ?c ?d ?e ?f ?A ?B ?C ?D ?E ?F))) | |
100 | (progn | |
101 | (push key events) | |
ad7d24c4 | 102 | (ucs-input-insert-char key)) |
7115232b DL |
103 | (quail-delete-region) |
104 | (throw 'non-digit (append (reverse events) | |
105 | (listify-key-sequence seq)))))) | |
106 | (quail-delete-region) | |
107 | (let* ((n (string-to-number (apply 'string | |
108 | (cdr (nreverse events))) | |
109 | 16)) | |
110 | (c (decode-char 'ucs n)) | |
ad7d24c4 | 111 | (status (make-vector 9 nil))) |
7115232b DL |
112 | (if c |
113 | (list c) | |
114 | (aset status 0 n) | |
115 | (string-to-list (ccl-execute-on-string | |
116 | 'utf-8-ccl-encode status "")))))) | |
117 | (quail-delete-overlays) | |
118 | (set-buffer-modified-p modified-p) | |
119 | (run-hooks 'input-method-after-insert-chunk-hook))))) | |
120 | ||
121 | (defun ucs-input-activate (&optional arg) | |
122 | "Activate UCS input method. | |
123 | With arg, activate UCS input method if and only if arg is positive. | |
124 | ||
125 | While this input method is active, the variable | |
126 | `input-method-function' is bound to the function `ucs-input-method'." | |
127 | (if (and arg | |
128 | (< (prefix-numeric-value arg) 0)) | |
129 | (unwind-protect | |
130 | (progn | |
ad7d24c4 | 131 | (quail-hide-guidance) |
7115232b DL |
132 | (quail-delete-overlays) |
133 | (setq describe-current-input-method-function nil)) | |
134 | (kill-local-variable 'input-method-function)) | |
135 | (setq inactivate-current-input-method-function 'ucs-input-inactivate) | |
136 | (setq describe-current-input-method-function 'ucs-input-help) | |
137 | (quail-delete-overlays) | |
138 | (if (eq (selected-window) (minibuffer-window)) | |
139 | (add-hook 'minibuffer-exit-hook 'quail-exit-from-minibuffer)) | |
7115232b DL |
140 | (set (make-local-variable 'input-method-function) |
141 | 'ucs-input-method))) | |
142 | ||
143 | (defun ucs-input-inactivate () | |
144 | "Inactivate UCS input method." | |
145 | (interactive) | |
146 | (ucs-input-activate -1)) | |
147 | ||
148 | (defun ucs-input-help () | |
149 | (interactive) | |
150 | (with-output-to-temp-buffer "*Help*" | |
151 | (princ "\ | |
152 | Input method: ucs (mode line indicator:U) | |
153 | ||
154 | Input as Unicode: U<hex> or u<hex>, where <hex> is a four-digit hex number."))) | |
155 | ||
ad7d24c4 KH |
156 | ;; The file ../leim-ext.el contains the following call. |
157 | ;; (register-input-method "ucs" "UTF-8" 'ucs-input-activate "U+" | |
158 | ;; "Unicode input as hex in the form Uxxxx.") | |
7115232b DL |
159 | |
160 | (provide 'uni-input) | |
161 | ||
ab5796a9 | 162 | ;;; arch-tag: e0d91c7c-19a1-43d3-8f2b-28c0e031efaa |
7115232b | 163 | ;;; uni-input.el ends here |