Commit | Line | Data |
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55535639 | 1 | ;;; disp-table.el --- functions for dealing with char tables |
c0274f38 | 2 | |
3ea1bd50 | 3 | ;; Copyright (C) 1987, 1994, 1995, 1999 Free Software Foundation, Inc. |
9750e079 | 4 | |
ef9c36a5 EN |
5 | ;; Author: Erik Naggum <erik@naggum.no> |
6 | ;; Based on a previous version by Howard Gayle | |
e5167999 | 7 | ;; Maintainer: FSF |
a1d15b3e | 8 | ;; Keywords: i18n |
a2535589 JA |
9 | |
10 | ;; This file is part of GNU Emacs. | |
11 | ||
12 | ;; GNU Emacs is free software; you can redistribute it and/or modify | |
13 | ;; it under the terms of the GNU General Public License as published by | |
e5167999 | 14 | ;; the Free Software Foundation; either version 2, or (at your option) |
a2535589 JA |
15 | ;; any later version. |
16 | ||
17 | ;; GNU Emacs is distributed in the hope that it will be useful, | |
18 | ;; but WITHOUT ANY WARRANTY; without even the implied warranty of | |
19 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
20 | ;; GNU General Public License for more details. | |
21 | ||
22 | ;; You should have received a copy of the GNU General Public License | |
b578f267 EN |
23 | ;; along with GNU Emacs; see the file COPYING. If not, write to the |
24 | ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
25 | ;; Boston, MA 02111-1307, USA. | |
a2535589 | 26 | |
55535639 PJ |
27 | ;;; Commentary: |
28 | ||
e5167999 | 29 | ;;; Code: |
a2535589 | 30 | |
963fd070 | 31 | (put 'display-table 'char-table-extra-slots 6) |
dc5a82ea | 32 | |
ef9c36a5 EN |
33 | ;;;###autoload |
34 | (defun make-display-table () | |
35 | "Return a new, empty display table." | |
963fd070 | 36 | (make-char-table 'display-table nil)) |
ef9c36a5 EN |
37 | |
38 | (or standard-display-table | |
39 | (setq standard-display-table (make-display-table))) | |
40 | ||
963fd070 RS |
41 | ;;; Display-table slot names. The property value says which slot. |
42 | ||
43 | (put 'truncation 'display-table-slot 0) | |
44 | (put 'wrap 'display-table-slot 1) | |
45 | (put 'escape 'display-table-slot 2) | |
46 | (put 'control 'display-table-slot 3) | |
47 | (put 'selective-display 'display-table-slot 4) | |
48 | (put 'vertical-border 'display-table-slot 5) | |
ef9c36a5 EN |
49 | |
50 | ;;;###autoload | |
51 | (defun display-table-slot (display-table slot) | |
52 | "Return the value of the extra slot in DISPLAY-TABLE named SLOT. | |
12c9fbcc EN |
53 | SLOT may be a number from 0 to 5 inclusive, or a slot name (symbol). |
54 | Valid symbols are `truncation', `wrap', `escape', `control', | |
55 | `selective-display', and `vertical-border'." | |
ef9c36a5 EN |
56 | (let ((slot-number |
57 | (if (numberp slot) slot | |
963fd070 | 58 | (or (get slot 'display-table-slot) |
ef9c36a5 EN |
59 | (error "Invalid display-table slot name: %s" slot))))) |
60 | (char-table-extra-slot display-table slot-number))) | |
61 | ||
62 | ;;;###autoload | |
63 | (defun set-display-table-slot (display-table slot value) | |
64 | "Set the value of the extra slot in DISPLAY-TABLE named SLOT to VALUE. | |
65 | SLOT may be a number from 0 to 5 inclusive, or a name (symbol). | |
12c9fbcc EN |
66 | Valid symbols are `truncation', `wrap', `escape', `control', |
67 | `selective-display', and `vertical-border'." | |
963fd070 RS |
68 | (let ((slot-number |
69 | (if (numberp slot) slot | |
70 | (or (get slot 'display-table-slot) | |
71 | (error "Invalid display-table slot name: %s" slot))))) | |
72 | (set-char-table-extra-slot display-table slot-number value))) | |
ef9c36a5 EN |
73 | |
74 | ;;;###autoload | |
e31b61e6 | 75 | (defun describe-display-table (dt) |
49116ac0 | 76 | "Describe the display table DT in a help buffer." |
a2535589 | 77 | (with-output-to-temp-buffer "*Help*" |
03131799 | 78 | (princ "\nTruncation glyph: ") |
963fd070 | 79 | (prin1 (display-table-slot dt 'truncation)) |
03131799 | 80 | (princ "\nWrap glyph: ") |
963fd070 | 81 | (prin1 (display-table-slot dt 'wrap)) |
03131799 | 82 | (princ "\nEscape glyph: ") |
963fd070 | 83 | (prin1 (display-table-slot dt 'escape)) |
03131799 | 84 | (princ "\nCtrl glyph: ") |
963fd070 | 85 | (prin1 (display-table-slot dt 'control)) |
afb1e4b4 | 86 | (princ "\nSelective display glyph sequence: ") |
963fd070 | 87 | (prin1 (display-table-slot dt 'selective-display)) |
dc5a82ea | 88 | (princ "\nVertical window border glyph: ") |
963fd070 | 89 | (prin1 (display-table-slot dt 'vertical-border)) |
afb1e4b4 | 90 | (princ "\nCharacter display glyph sequences:\n") |
bb6066c8 RS |
91 | (save-excursion |
92 | (set-buffer standard-output) | |
93 | (let ((vector (make-vector 256 nil)) | |
94 | (i 0)) | |
95 | (while (< i 256) | |
96 | (aset vector i (aref dt i)) | |
97 | (setq i (1+ i))) | |
5d74f2a6 KH |
98 | (describe-vector vector)) |
99 | (help-mode)) | |
a2535589 JA |
100 | (print-help-return-message))) |
101 | ||
e31b61e6 | 102 | ;;;###autoload |
a2535589 | 103 | (defun describe-current-display-table () |
bb6066c8 RS |
104 | "Describe the display table in use in the selected window and buffer." |
105 | (interactive) | |
ef9c36a5 EN |
106 | (let ((disptab (or (window-display-table (selected-window)) |
107 | buffer-display-table | |
108 | standard-display-table))) | |
bb6066c8 RS |
109 | (if disptab |
110 | (describe-display-table disptab) | |
111 | (message "No display table")))) | |
a2535589 | 112 | |
e31b61e6 | 113 | ;;;###autoload |
a2535589 | 114 | (defun standard-display-8bit (l h) |
49116ac0 | 115 | "Display characters in the range L to H literally." |
a2535589 JA |
116 | (while (<= l h) |
117 | (if (and (>= l ?\ ) (< l 127)) | |
ef9c36a5 | 118 | (aset standard-display-table l nil) |
afb1e4b4 | 119 | (aset standard-display-table l (vector l))) |
a2535589 JA |
120 | (setq l (1+ l)))) |
121 | ||
798aa8d0 JB |
122 | ;;;###autoload |
123 | (defun standard-display-default (l h) | |
124 | "Display characters in the range L to H using the default notation." | |
125 | (while (<= l h) | |
1c2c3f16 DL |
126 | (if (and (>= l ?\ ) (char-valid-p l)) |
127 | (aset standard-display-table l nil)) | |
798aa8d0 JB |
128 | (setq l (1+ l)))) |
129 | ||
a171458a KH |
130 | ;; This function does NOT take terminal-dependent escape sequences. |
131 | ;; For that, you need to go through create-glyph. Use one of the | |
132 | ;; other functions below, or roll your own. | |
ef9c36a5 | 133 | ;;;###autoload |
a2535589 | 134 | (defun standard-display-ascii (c s) |
a171458a | 135 | "Display character C using printable string S." |
ef9c36a5 | 136 | (aset standard-display-table c (vconcat s))) |
a2535589 | 137 | |
e31b61e6 | 138 | ;;;###autoload |
a2535589 | 139 | (defun standard-display-g1 (c sc) |
de7d5cb6 KH |
140 | "Display character C as character SC in the g1 character set. |
141 | This function assumes that your terminal uses the SO/SI characters; | |
142 | it is meaningless for an X frame." | |
744bcf11 | 143 | (if (memq window-system '(x w32)) |
de7d5cb6 | 144 | (error "Cannot use string glyphs in a windowing system")) |
a2535589 | 145 | (aset standard-display-table c |
82093c70 | 146 | (vector (create-glyph (concat "\016" (char-to-string sc) "\017"))))) |
a2535589 | 147 | |
e31b61e6 | 148 | ;;;###autoload |
a2535589 | 149 | (defun standard-display-graphic (c gc) |
de7d5cb6 KH |
150 | "Display character C as character GC in graphics character set. |
151 | This function assumes VT100-compatible escapes; it is meaningless for an | |
152 | X frame." | |
744bcf11 | 153 | (if (memq window-system '(x w32)) |
de7d5cb6 | 154 | (error "Cannot use string glyphs in a windowing system")) |
a2535589 | 155 | (aset standard-display-table c |
82093c70 | 156 | (vector (create-glyph (concat "\e(0" (char-to-string gc) "\e(B"))))) |
a2535589 | 157 | |
e31b61e6 | 158 | ;;;###autoload |
a2535589 JA |
159 | (defun standard-display-underline (c uc) |
160 | "Display character C as character UC plus underlining." | |
a2535589 | 161 | (aset standard-display-table c |
de7d5cb6 KH |
162 | (vector |
163 | (if window-system | |
30c5ceb4 | 164 | (logior uc (lsh (face-id 'underline) 19)) |
de7d5cb6 | 165 | (create-glyph (concat "\e[4m" (char-to-string uc) "\e[m")))))) |
03131799 | 166 | |
e31b61e6 | 167 | ;;;###autoload |
03131799 | 168 | (defun create-glyph (string) |
b8fbaf52 | 169 | "Allocate a glyph code to display by sending STRING to the terminal." |
03131799 RS |
170 | (if (= (length glyph-table) 65536) |
171 | (error "No free glyph codes remain")) | |
03fd83c5 KH |
172 | ;; Don't use slots that correspond to ASCII characters. |
173 | (if (= (length glyph-table) 32) | |
174 | (setq glyph-table (vconcat glyph-table (make-vector 224 nil)))) | |
03131799 RS |
175 | (setq glyph-table (vconcat glyph-table (list string))) |
176 | (1- (length glyph-table))) | |
a2535589 | 177 | |
2eae7226 | 178 | ;;;###autoload |
951bc45f | 179 | (defun standard-display-european (arg) |
3fbd8622 | 180 | "Semi-obsolete way to toggle display of ISO 8859 European characters. |
3ea1bd50 | 181 | |
3fbd8622 KH |
182 | This function is semi-obsolete; if you want to do your editing with |
183 | unibyte characters, it is better to `set-language-environment' coupled | |
184 | with either the `--unibyte' option or the EMACS_UNIBYTE environment | |
185 | variable, or else customize `enable-multibyte-characters'. | |
828fac3a | 186 | |
3fbd8622 KH |
187 | With prefix argument, this command enables European character display |
188 | if arg is positive, disables it otherwise. Otherwise, it toggles | |
189 | European character display. | |
b2b52747 | 190 | |
3fbd8622 KH |
191 | When this mode is enabled, characters in the range of 160 to 255 |
192 | display not as octal escapes, but as accented characters. Codes 146 | |
193 | and 160 display as apostrophe and space, even though they are not the | |
194 | ASCII codes for apostrophe and space. | |
40e82ac1 | 195 | |
3fbd8622 KH |
196 | Enabling European character display with this command noninteractively |
197 | from Lisp code also selects Latin-1 as the language environment, and | |
198 | selects unibyte mode for all Emacs buffers \(both existing buffers and | |
199 | those created subsequently). This provides increased compatibility | |
200 | for users who call this function in `.emacs'." | |
f5af76c2 | 201 | |
c3a14a2b | 202 | (if (or (<= (prefix-numeric-value arg) 0) |
2eae7226 | 203 | (and (null arg) |
ef9c36a5 | 204 | (char-table-p standard-display-table) |
55f5abaf | 205 | ;; Test 161, because 160 displays as a space. |
e470e6f0 | 206 | (equal (aref standard-display-table 161) [161]))) |
3304a6c4 RS |
207 | (progn |
208 | (standard-display-default 160 255) | |
3fbd8622 | 209 | (unless (or (memq window-system '(x w32)) |
951bc45f | 210 | (interactive-p)) |
3fbd8622 KH |
211 | (and (terminal-coding-system) |
212 | (set-terminal-coding-system nil)))) | |
213 | ;; If the user does this explicitly from Lisp (as in .emacs), | |
40e82ac1 | 214 | ;; turn off multibyte chars for more compatibility. |
951bc45f | 215 | (unless (interactive-p) |
65c9d785 | 216 | (setq-default enable-multibyte-characters nil) |
3ea1bd50 RS |
217 | (mapcar (lambda (buffer) |
218 | (with-current-buffer buffer | |
219 | (if enable-multibyte-characters | |
220 | (set-buffer-multibyte nil)))) | |
221 | (buffer-list))) | |
eb72c1bd RS |
222 | ;; If the user does this explicitly, |
223 | ;; switch to Latin-1 language environment | |
224 | ;; unless some other has been specified. | |
951bc45f | 225 | (unless (interactive-p) |
eb72c1bd RS |
226 | (if (equal current-language-environment "English") |
227 | (set-language-environment "latin-1"))) | |
3fbd8622 | 228 | (unless (or noninteractive (memq window-system '(x w32)) |
951bc45f PE |
229 | (interactive-p)) |
230 | ;; Send those codes literally to a character-based terminal. | |
231 | ;; If we are using single-byte characters, | |
232 | ;; it doesn't matter which coding system we use. | |
4e633bb8 | 233 | (set-terminal-coding-system |
951bc45f PE |
234 | (let ((c (intern (downcase current-language-environment)))) |
235 | (if (coding-system-p c) c 'latin-1)))) | |
eb72c1bd | 236 | (standard-display-european-internal))) |
798aa8d0 | 237 | |
a2535589 | 238 | (provide 'disp-table) |
c0274f38 ER |
239 | |
240 | ;;; disp-table.el ends here |