Commit | Line | Data |
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55535639 | 1 | ;;; disp-table.el --- functions for dealing with char tables |
c0274f38 | 2 | |
e91081eb | 3 | ;; Copyright (C) 1987, 1994, 1995, 1999, 2001, 2002, 2003, 2004, |
409cc4a3 | 4 | ;; 2005, 2006, 2007, 2008 Free Software Foundation, Inc. |
9750e079 | 5 | |
ef9c36a5 EN |
6 | ;; Author: Erik Naggum <erik@naggum.no> |
7 | ;; Based on a previous version by Howard Gayle | |
e5167999 | 8 | ;; Maintainer: FSF |
a1d15b3e | 9 | ;; Keywords: i18n |
a2535589 JA |
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 | |
b4aa6026 | 15 | ;; the Free Software Foundation; either version 3, or (at your option) |
a2535589 JA |
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 | |
b578f267 | 24 | ;; along with GNU Emacs; see the file COPYING. If not, write to the |
086add15 LK |
25 | ;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
26 | ;; Boston, MA 02110-1301, USA. | |
a2535589 | 27 | |
55535639 PJ |
28 | ;;; Commentary: |
29 | ||
e5167999 | 30 | ;;; Code: |
a2535589 | 31 | |
963fd070 | 32 | (put 'display-table 'char-table-extra-slots 6) |
dc5a82ea | 33 | |
ef9c36a5 EN |
34 | ;;;###autoload |
35 | (defun make-display-table () | |
36 | "Return a new, empty display table." | |
963fd070 | 37 | (make-char-table 'display-table nil)) |
ef9c36a5 EN |
38 | |
39 | (or standard-display-table | |
40 | (setq standard-display-table (make-display-table))) | |
41 | ||
963fd070 RS |
42 | ;;; Display-table slot names. The property value says which slot. |
43 | ||
44 | (put 'truncation 'display-table-slot 0) | |
45 | (put 'wrap 'display-table-slot 1) | |
46 | (put 'escape 'display-table-slot 2) | |
47 | (put 'control 'display-table-slot 3) | |
48 | (put 'selective-display 'display-table-slot 4) | |
49 | (put 'vertical-border 'display-table-slot 5) | |
ef9c36a5 EN |
50 | |
51 | ;;;###autoload | |
52 | (defun display-table-slot (display-table slot) | |
53 | "Return the value of the extra slot in DISPLAY-TABLE named SLOT. | |
12c9fbcc EN |
54 | SLOT may be a number from 0 to 5 inclusive, or a slot name (symbol). |
55 | Valid symbols are `truncation', `wrap', `escape', `control', | |
56 | `selective-display', and `vertical-border'." | |
ef9c36a5 EN |
57 | (let ((slot-number |
58 | (if (numberp slot) slot | |
963fd070 | 59 | (or (get slot 'display-table-slot) |
ef9c36a5 EN |
60 | (error "Invalid display-table slot name: %s" slot))))) |
61 | (char-table-extra-slot display-table slot-number))) | |
62 | ||
63 | ;;;###autoload | |
64 | (defun set-display-table-slot (display-table slot value) | |
65 | "Set the value of the extra slot in DISPLAY-TABLE named SLOT to VALUE. | |
66 | SLOT may be a number from 0 to 5 inclusive, or a name (symbol). | |
12c9fbcc EN |
67 | Valid symbols are `truncation', `wrap', `escape', `control', |
68 | `selective-display', and `vertical-border'." | |
963fd070 RS |
69 | (let ((slot-number |
70 | (if (numberp slot) slot | |
71 | (or (get slot 'display-table-slot) | |
72 | (error "Invalid display-table slot name: %s" slot))))) | |
73 | (set-char-table-extra-slot display-table slot-number value))) | |
ef9c36a5 EN |
74 | |
75 | ;;;###autoload | |
e31b61e6 | 76 | (defun describe-display-table (dt) |
49116ac0 | 77 | "Describe the display table DT in a help buffer." |
e3d68257 | 78 | (with-help-window "*Help*" |
03131799 | 79 | (princ "\nTruncation glyph: ") |
963fd070 | 80 | (prin1 (display-table-slot dt 'truncation)) |
03131799 | 81 | (princ "\nWrap glyph: ") |
963fd070 | 82 | (prin1 (display-table-slot dt 'wrap)) |
03131799 | 83 | (princ "\nEscape glyph: ") |
963fd070 | 84 | (prin1 (display-table-slot dt 'escape)) |
03131799 | 85 | (princ "\nCtrl glyph: ") |
963fd070 | 86 | (prin1 (display-table-slot dt 'control)) |
afb1e4b4 | 87 | (princ "\nSelective display glyph sequence: ") |
963fd070 | 88 | (prin1 (display-table-slot dt 'selective-display)) |
dc5a82ea | 89 | (princ "\nVertical window border glyph: ") |
963fd070 | 90 | (prin1 (display-table-slot dt 'vertical-border)) |
afb1e4b4 | 91 | (princ "\nCharacter display glyph sequences:\n") |
bb6066c8 RS |
92 | (save-excursion |
93 | (set-buffer standard-output) | |
94 | (let ((vector (make-vector 256 nil)) | |
95 | (i 0)) | |
96 | (while (< i 256) | |
97 | (aset vector i (aref dt i)) | |
98 | (setq i (1+ i))) | |
5d74f2a6 | 99 | (describe-vector vector)) |
e3d68257 | 100 | (help-mode)))) |
a2535589 | 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." |
6b61353c KH |
116 | (or standard-display-table |
117 | (setq standard-display-table (make-display-table))) | |
a2535589 | 118 | (while (<= l h) |
dae50e4f | 119 | (aset standard-display-table l (if (or (< l ?\s) (>= l 127)) (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." | |
6b61353c KH |
125 | (or standard-display-table |
126 | (setq standard-display-table (make-display-table))) | |
798aa8d0 | 127 | (while (<= l h) |
a0451a71 | 128 | (if (and (>= l ?\s) (characterp l)) |
1c2c3f16 | 129 | (aset standard-display-table l nil)) |
798aa8d0 JB |
130 | (setq l (1+ l)))) |
131 | ||
a171458a KH |
132 | ;; This function does NOT take terminal-dependent escape sequences. |
133 | ;; For that, you need to go through create-glyph. Use one of the | |
134 | ;; other functions below, or roll your own. | |
ef9c36a5 | 135 | ;;;###autoload |
a2535589 | 136 | (defun standard-display-ascii (c s) |
a171458a | 137 | "Display character C using printable string S." |
6b61353c KH |
138 | (or standard-display-table |
139 | (setq standard-display-table (make-display-table))) | |
ef9c36a5 | 140 | (aset standard-display-table c (vconcat s))) |
a2535589 | 141 | |
e31b61e6 | 142 | ;;;###autoload |
a2535589 | 143 | (defun standard-display-g1 (c sc) |
de7d5cb6 KH |
144 | "Display character C as character SC in the g1 character set. |
145 | This function assumes that your terminal uses the SO/SI characters; | |
146 | it is meaningless for an X frame." | |
06b4a81b | 147 | (if (memq window-system '(x w32 mac)) |
de7d5cb6 | 148 | (error "Cannot use string glyphs in a windowing system")) |
6b61353c KH |
149 | (or standard-display-table |
150 | (setq standard-display-table (make-display-table))) | |
a2535589 | 151 | (aset standard-display-table c |
82093c70 | 152 | (vector (create-glyph (concat "\016" (char-to-string sc) "\017"))))) |
a2535589 | 153 | |
e31b61e6 | 154 | ;;;###autoload |
a2535589 | 155 | (defun standard-display-graphic (c gc) |
de7d5cb6 KH |
156 | "Display character C as character GC in graphics character set. |
157 | This function assumes VT100-compatible escapes; it is meaningless for an | |
158 | X frame." | |
06b4a81b | 159 | (if (memq window-system '(x w32 mac)) |
de7d5cb6 | 160 | (error "Cannot use string glyphs in a windowing system")) |
6b61353c KH |
161 | (or standard-display-table |
162 | (setq standard-display-table (make-display-table))) | |
a2535589 | 163 | (aset standard-display-table c |
82093c70 | 164 | (vector (create-glyph (concat "\e(0" (char-to-string gc) "\e(B"))))) |
a2535589 | 165 | |
e31b61e6 | 166 | ;;;###autoload |
a2535589 JA |
167 | (defun standard-display-underline (c uc) |
168 | "Display character C as character UC plus underlining." | |
6b61353c KH |
169 | (or standard-display-table |
170 | (setq standard-display-table (make-display-table))) | |
a2535589 | 171 | (aset standard-display-table c |
71296446 | 172 | (vector |
de7d5cb6 | 173 | (if window-system |
7dbfbd91 | 174 | (make-glyph-code uc 'underline) |
de7d5cb6 | 175 | (create-glyph (concat "\e[4m" (char-to-string uc) "\e[m")))))) |
03131799 | 176 | |
e31b61e6 | 177 | ;;;###autoload |
03131799 | 178 | (defun create-glyph (string) |
b8fbaf52 | 179 | "Allocate a glyph code to display by sending STRING to the terminal." |
03131799 RS |
180 | (if (= (length glyph-table) 65536) |
181 | (error "No free glyph codes remain")) | |
03fd83c5 KH |
182 | ;; Don't use slots that correspond to ASCII characters. |
183 | (if (= (length glyph-table) 32) | |
184 | (setq glyph-table (vconcat glyph-table (make-vector 224 nil)))) | |
03131799 RS |
185 | (setq glyph-table (vconcat glyph-table (list string))) |
186 | (1- (length glyph-table))) | |
a2535589 | 187 | |
7dbfbd91 KS |
188 | ;;;###autoload |
189 | (defun make-glyph-code (char &optional face) | |
190 | "Return a glyph code representing char CHAR with face FACE." | |
191 | ;; Due to limitations on Emacs integer values, faces with | |
7cc8cfc0 | 192 | ;; face id greater that 512 are silently ignored. |
20e70daf KS |
193 | (if (not face) |
194 | char | |
195 | (let ((fid (face-id face))) | |
196 | (cond | |
197 | ((not fid) (error "unknown face")) | |
198 | ((< fid 64) ; we have 32 - 3(LSB) - 1(SIGN) - 22(CHAR) = 6 bits for face id | |
199 | (logior char (lsh fid 22))) | |
200 | (t (cons char fid)))))) | |
7dbfbd91 KS |
201 | |
202 | ;;;###autoload | |
203 | (defun glyph-char (glyph) | |
204 | "Return the character of glyph code GLYPH." | |
20e70daf KS |
205 | (if (consp glyph) |
206 | (car glyph) | |
207 | (logand glyph #x3fffff))) | |
7dbfbd91 KS |
208 | |
209 | ;;;###autoload | |
210 | (defun glyph-face (glyph) | |
211 | "Return the face of glyph code GLYPH, or nil if glyph has default face." | |
20e70daf KS |
212 | |
213 | (let ((face-id (if (consp glyph) (cdr glyph) (lsh glyph -22)))) | |
7dbfbd91 KS |
214 | (and (> face-id 0) |
215 | (car (delq nil (mapcar (lambda (face) | |
216 | (and (eq (get face 'face) face-id) | |
217 | face)) | |
218 | (face-list))))))) | |
219 | ||
2eae7226 | 220 | ;;;###autoload |
951bc45f | 221 | (defun standard-display-european (arg) |
3fbd8622 | 222 | "Semi-obsolete way to toggle display of ISO 8859 European characters. |
3ea1bd50 | 223 | |
3fbd8622 KH |
224 | This function is semi-obsolete; if you want to do your editing with |
225 | unibyte characters, it is better to `set-language-environment' coupled | |
226 | with either the `--unibyte' option or the EMACS_UNIBYTE environment | |
227 | variable, or else customize `enable-multibyte-characters'. | |
828fac3a | 228 | |
3fbd8622 | 229 | With prefix argument, this command enables European character display |
178f6d1f | 230 | if ARG is positive, disables it otherwise. Otherwise, it toggles |
3fbd8622 | 231 | European character display. |
b2b52747 | 232 | |
3fbd8622 KH |
233 | When this mode is enabled, characters in the range of 160 to 255 |
234 | display not as octal escapes, but as accented characters. Codes 146 | |
235 | and 160 display as apostrophe and space, even though they are not the | |
236 | ASCII codes for apostrophe and space. | |
40e82ac1 | 237 | |
3fbd8622 KH |
238 | Enabling European character display with this command noninteractively |
239 | from Lisp code also selects Latin-1 as the language environment, and | |
240 | selects unibyte mode for all Emacs buffers \(both existing buffers and | |
241 | those created subsequently). This provides increased compatibility | |
242 | for users who call this function in `.emacs'." | |
f5af76c2 | 243 | |
c3a14a2b | 244 | (if (or (<= (prefix-numeric-value arg) 0) |
2eae7226 | 245 | (and (null arg) |
ef9c36a5 | 246 | (char-table-p standard-display-table) |
55f5abaf | 247 | ;; Test 161, because 160 displays as a space. |
e470e6f0 | 248 | (equal (aref standard-display-table 161) [161]))) |
3304a6c4 RS |
249 | (progn |
250 | (standard-display-default 160 255) | |
06b4a81b | 251 | (unless (or (memq window-system '(x w32 mac))) |
3fbd8622 KH |
252 | (and (terminal-coding-system) |
253 | (set-terminal-coding-system nil)))) | |
6fbb1eb0 RS |
254 | |
255 | (display-warning 'i18n | |
61af05c3 | 256 | "`standard-display-european' is semi-obsolete; see its doc string for details" |
6fbb1eb0 | 257 | :warning) |
fbd798e2 SM |
258 | |
259 | ;; Switch to Latin-1 language environment | |
eb72c1bd | 260 | ;; unless some other has been specified. |
fbd798e2 SM |
261 | (if (equal current-language-environment "English") |
262 | (set-language-environment "latin-1")) | |
d64f470d | 263 | (unless (or noninteractive (memq window-system '(x w32 mac))) |
951bc45f PE |
264 | ;; Send those codes literally to a character-based terminal. |
265 | ;; If we are using single-byte characters, | |
266 | ;; it doesn't matter which coding system we use. | |
4e633bb8 | 267 | (set-terminal-coding-system |
951bc45f PE |
268 | (let ((c (intern (downcase current-language-environment)))) |
269 | (if (coding-system-p c) c 'latin-1)))) | |
eb72c1bd | 270 | (standard-display-european-internal))) |
798aa8d0 | 271 | |
a2535589 | 272 | (provide 'disp-table) |
c0274f38 | 273 | |
178f6d1f | 274 | ;; arch-tag: ffe4c28c-960c-47aa-b8a8-ae89d371ffc7 |
c0274f38 | 275 | ;;; disp-table.el ends here |