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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, |
114f9c96 | 4 | ;; 2005, 2006, 2007, 2008, 2009, 2010 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 | ||
eb3fa2cf | 13 | ;; GNU Emacs is free software: you can redistribute it and/or modify |
a2535589 | 14 | ;; it under the terms of the GNU General Public License as published by |
eb3fa2cf GM |
15 | ;; the Free Software Foundation, either version 3 of the License, or |
16 | ;; (at your option) any later version. | |
a2535589 JA |
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 | |
eb3fa2cf | 24 | ;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. |
a2535589 | 25 | |
55535639 PJ |
26 | ;;; Commentary: |
27 | ||
e5167999 | 28 | ;;; Code: |
a2535589 | 29 | |
963fd070 | 30 | (put 'display-table 'char-table-extra-slots 6) |
dc5a82ea | 31 | |
ef9c36a5 EN |
32 | ;;;###autoload |
33 | (defun make-display-table () | |
34 | "Return a new, empty display table." | |
963fd070 | 35 | (make-char-table 'display-table nil)) |
ef9c36a5 EN |
36 | |
37 | (or standard-display-table | |
38 | (setq standard-display-table (make-display-table))) | |
39 | ||
963fd070 RS |
40 | ;;; Display-table slot names. The property value says which slot. |
41 | ||
42 | (put 'truncation 'display-table-slot 0) | |
43 | (put 'wrap 'display-table-slot 1) | |
44 | (put 'escape 'display-table-slot 2) | |
45 | (put 'control 'display-table-slot 3) | |
46 | (put 'selective-display 'display-table-slot 4) | |
47 | (put 'vertical-border 'display-table-slot 5) | |
ef9c36a5 EN |
48 | |
49 | ;;;###autoload | |
50 | (defun display-table-slot (display-table slot) | |
51 | "Return the value of the extra slot in DISPLAY-TABLE named SLOT. | |
12c9fbcc EN |
52 | SLOT may be a number from 0 to 5 inclusive, or a slot name (symbol). |
53 | Valid symbols are `truncation', `wrap', `escape', `control', | |
54 | `selective-display', and `vertical-border'." | |
ef9c36a5 EN |
55 | (let ((slot-number |
56 | (if (numberp slot) slot | |
963fd070 | 57 | (or (get slot 'display-table-slot) |
ef9c36a5 EN |
58 | (error "Invalid display-table slot name: %s" slot))))) |
59 | (char-table-extra-slot display-table slot-number))) | |
60 | ||
61 | ;;;###autoload | |
62 | (defun set-display-table-slot (display-table slot value) | |
63 | "Set the value of the extra slot in DISPLAY-TABLE named SLOT to VALUE. | |
64 | SLOT may be a number from 0 to 5 inclusive, or a name (symbol). | |
12c9fbcc EN |
65 | Valid symbols are `truncation', `wrap', `escape', `control', |
66 | `selective-display', and `vertical-border'." | |
963fd070 RS |
67 | (let ((slot-number |
68 | (if (numberp slot) slot | |
69 | (or (get slot 'display-table-slot) | |
70 | (error "Invalid display-table slot name: %s" slot))))) | |
71 | (set-char-table-extra-slot display-table slot-number value))) | |
ef9c36a5 EN |
72 | |
73 | ;;;###autoload | |
e31b61e6 | 74 | (defun describe-display-table (dt) |
49116ac0 | 75 | "Describe the display table DT in a help buffer." |
e3d68257 | 76 | (with-help-window "*Help*" |
03131799 | 77 | (princ "\nTruncation glyph: ") |
963fd070 | 78 | (prin1 (display-table-slot dt 'truncation)) |
03131799 | 79 | (princ "\nWrap glyph: ") |
963fd070 | 80 | (prin1 (display-table-slot dt 'wrap)) |
03131799 | 81 | (princ "\nEscape glyph: ") |
963fd070 | 82 | (prin1 (display-table-slot dt 'escape)) |
03131799 | 83 | (princ "\nCtrl glyph: ") |
963fd070 | 84 | (prin1 (display-table-slot dt 'control)) |
afb1e4b4 | 85 | (princ "\nSelective display glyph sequence: ") |
963fd070 | 86 | (prin1 (display-table-slot dt 'selective-display)) |
dc5a82ea | 87 | (princ "\nVertical window border glyph: ") |
963fd070 | 88 | (prin1 (display-table-slot dt 'vertical-border)) |
afb1e4b4 | 89 | (princ "\nCharacter display glyph sequences:\n") |
7fdbcd83 | 90 | (with-current-buffer standard-output |
bb6066c8 RS |
91 | (let ((vector (make-vector 256 nil)) |
92 | (i 0)) | |
93 | (while (< i 256) | |
94 | (aset vector i (aref dt i)) | |
95 | (setq i (1+ i))) | |
5d74f2a6 | 96 | (describe-vector vector)) |
e3d68257 | 97 | (help-mode)))) |
a2535589 | 98 | |
e31b61e6 | 99 | ;;;###autoload |
a2535589 | 100 | (defun describe-current-display-table () |
bb6066c8 RS |
101 | "Describe the display table in use in the selected window and buffer." |
102 | (interactive) | |
ef9c36a5 EN |
103 | (let ((disptab (or (window-display-table (selected-window)) |
104 | buffer-display-table | |
105 | standard-display-table))) | |
bb6066c8 RS |
106 | (if disptab |
107 | (describe-display-table disptab) | |
108 | (message "No display table")))) | |
a2535589 | 109 | |
e31b61e6 | 110 | ;;;###autoload |
a2535589 | 111 | (defun standard-display-8bit (l h) |
49116ac0 | 112 | "Display characters in the range L to H literally." |
6b61353c KH |
113 | (or standard-display-table |
114 | (setq standard-display-table (make-display-table))) | |
a2535589 | 115 | (while (<= l h) |
dae50e4f | 116 | (aset standard-display-table l (if (or (< l ?\s) (>= l 127)) (vector l))) |
a2535589 JA |
117 | (setq l (1+ l)))) |
118 | ||
798aa8d0 JB |
119 | ;;;###autoload |
120 | (defun standard-display-default (l h) | |
121 | "Display characters in the range L to H using the default notation." | |
6b61353c KH |
122 | (or standard-display-table |
123 | (setq standard-display-table (make-display-table))) | |
798aa8d0 | 124 | (while (<= l h) |
a0451a71 | 125 | (if (and (>= l ?\s) (characterp l)) |
1c2c3f16 | 126 | (aset standard-display-table l nil)) |
798aa8d0 JB |
127 | (setq l (1+ l)))) |
128 | ||
a171458a KH |
129 | ;; This function does NOT take terminal-dependent escape sequences. |
130 | ;; For that, you need to go through create-glyph. Use one of the | |
131 | ;; other functions below, or roll your own. | |
ef9c36a5 | 132 | ;;;###autoload |
a2535589 | 133 | (defun standard-display-ascii (c s) |
a171458a | 134 | "Display character C using printable string S." |
6b61353c KH |
135 | (or standard-display-table |
136 | (setq standard-display-table (make-display-table))) | |
ef9c36a5 | 137 | (aset standard-display-table c (vconcat s))) |
a2535589 | 138 | |
e31b61e6 | 139 | ;;;###autoload |
a2535589 | 140 | (defun standard-display-g1 (c sc) |
de7d5cb6 KH |
141 | "Display character C as character SC in the g1 character set. |
142 | This function assumes that your terminal uses the SO/SI characters; | |
143 | it is meaningless for an X frame." | |
9e2a2647 | 144 | (if (memq window-system '(x w32 ns)) |
de7d5cb6 | 145 | (error "Cannot use string glyphs in a windowing system")) |
6b61353c KH |
146 | (or standard-display-table |
147 | (setq standard-display-table (make-display-table))) | |
a2535589 | 148 | (aset standard-display-table c |
82093c70 | 149 | (vector (create-glyph (concat "\016" (char-to-string sc) "\017"))))) |
a2535589 | 150 | |
e31b61e6 | 151 | ;;;###autoload |
a2535589 | 152 | (defun standard-display-graphic (c gc) |
de7d5cb6 KH |
153 | "Display character C as character GC in graphics character set. |
154 | This function assumes VT100-compatible escapes; it is meaningless for an | |
155 | X frame." | |
9e2a2647 | 156 | (if (memq window-system '(x w32 ns)) |
de7d5cb6 | 157 | (error "Cannot use string glyphs in a windowing system")) |
6b61353c KH |
158 | (or standard-display-table |
159 | (setq standard-display-table (make-display-table))) | |
a2535589 | 160 | (aset standard-display-table c |
82093c70 | 161 | (vector (create-glyph (concat "\e(0" (char-to-string gc) "\e(B"))))) |
a2535589 | 162 | |
e31b61e6 | 163 | ;;;###autoload |
a2535589 JA |
164 | (defun standard-display-underline (c uc) |
165 | "Display character C as character UC plus underlining." | |
6b61353c KH |
166 | (or standard-display-table |
167 | (setq standard-display-table (make-display-table))) | |
a2535589 | 168 | (aset standard-display-table c |
71296446 | 169 | (vector |
de7d5cb6 | 170 | (if window-system |
7dbfbd91 | 171 | (make-glyph-code uc 'underline) |
de7d5cb6 | 172 | (create-glyph (concat "\e[4m" (char-to-string uc) "\e[m")))))) |
03131799 | 173 | |
e31b61e6 | 174 | ;;;###autoload |
03131799 | 175 | (defun create-glyph (string) |
b8fbaf52 | 176 | "Allocate a glyph code to display by sending STRING to the terminal." |
03131799 RS |
177 | (if (= (length glyph-table) 65536) |
178 | (error "No free glyph codes remain")) | |
03fd83c5 KH |
179 | ;; Don't use slots that correspond to ASCII characters. |
180 | (if (= (length glyph-table) 32) | |
181 | (setq glyph-table (vconcat glyph-table (make-vector 224 nil)))) | |
03131799 RS |
182 | (setq glyph-table (vconcat glyph-table (list string))) |
183 | (1- (length glyph-table))) | |
a2535589 | 184 | |
7dbfbd91 KS |
185 | ;;;###autoload |
186 | (defun make-glyph-code (char &optional face) | |
187 | "Return a glyph code representing char CHAR with face FACE." | |
188 | ;; Due to limitations on Emacs integer values, faces with | |
7cc8cfc0 | 189 | ;; face id greater that 512 are silently ignored. |
20e70daf KS |
190 | (if (not face) |
191 | char | |
192 | (let ((fid (face-id face))) | |
e0c8ae10 JB |
193 | (if (< fid 64) ; we have 32 - 3(LSB) - 1(SIGN) - 22(CHAR) = 6 bits for face id |
194 | (logior char (lsh fid 22)) | |
195 | (cons char fid))))) | |
7dbfbd91 KS |
196 | |
197 | ;;;###autoload | |
198 | (defun glyph-char (glyph) | |
199 | "Return the character of glyph code GLYPH." | |
20e70daf KS |
200 | (if (consp glyph) |
201 | (car glyph) | |
202 | (logand glyph #x3fffff))) | |
7dbfbd91 KS |
203 | |
204 | ;;;###autoload | |
205 | (defun glyph-face (glyph) | |
206 | "Return the face of glyph code GLYPH, or nil if glyph has default face." | |
20e70daf | 207 | (let ((face-id (if (consp glyph) (cdr glyph) (lsh glyph -22)))) |
7dbfbd91 | 208 | (and (> face-id 0) |
e0c8ae10 JB |
209 | (catch 'face |
210 | (dolist (face (face-list)) | |
211 | (when (eq (face-id face) face-id) | |
212 | (throw 'face face))))))) | |
7dbfbd91 | 213 | |
2eae7226 | 214 | ;;;###autoload |
951bc45f | 215 | (defun standard-display-european (arg) |
3fbd8622 | 216 | "Semi-obsolete way to toggle display of ISO 8859 European characters. |
3ea1bd50 | 217 | |
82e98df4 SM |
218 | This function is semi-obsolete; you probably don't need it, or else you |
219 | probably should use `set-language-environment' or `set-locale-environment'. | |
828fac3a | 220 | |
82e98df4 SM |
221 | This function enables European character display if ARG is positive, |
222 | disables it if negative. Otherwise, it toggles European character display. | |
b2b52747 | 223 | |
3fbd8622 KH |
224 | When this mode is enabled, characters in the range of 160 to 255 |
225 | display not as octal escapes, but as accented characters. Codes 146 | |
226 | and 160 display as apostrophe and space, even though they are not the | |
227 | ASCII codes for apostrophe and space. | |
40e82ac1 | 228 | |
3fbd8622 | 229 | Enabling European character display with this command noninteractively |
82e98df4 SM |
230 | from Lisp code also selects Latin-1 as the language environment. |
231 | This provides increased compatibility for users who call this function | |
232 | in `.emacs'." | |
f5af76c2 | 233 | |
c3a14a2b | 234 | (if (or (<= (prefix-numeric-value arg) 0) |
2eae7226 | 235 | (and (null arg) |
ef9c36a5 | 236 | (char-table-p standard-display-table) |
55f5abaf | 237 | ;; Test 161, because 160 displays as a space. |
e470e6f0 | 238 | (equal (aref standard-display-table 161) [161]))) |
3304a6c4 RS |
239 | (progn |
240 | (standard-display-default 160 255) | |
9e2a2647 | 241 | (unless (or (memq window-system '(x w32 ns))) |
3fbd8622 KH |
242 | (and (terminal-coding-system) |
243 | (set-terminal-coding-system nil)))) | |
6fbb1eb0 RS |
244 | |
245 | (display-warning 'i18n | |
61af05c3 | 246 | "`standard-display-european' is semi-obsolete; see its doc string for details" |
6fbb1eb0 | 247 | :warning) |
fbd798e2 SM |
248 | |
249 | ;; Switch to Latin-1 language environment | |
eb72c1bd | 250 | ;; unless some other has been specified. |
fbd798e2 SM |
251 | (if (equal current-language-environment "English") |
252 | (set-language-environment "latin-1")) | |
9e2a2647 | 253 | (unless (or noninteractive (memq window-system '(x w32 ns))) |
951bc45f PE |
254 | ;; Send those codes literally to a character-based terminal. |
255 | ;; If we are using single-byte characters, | |
256 | ;; it doesn't matter which coding system we use. | |
4e633bb8 | 257 | (set-terminal-coding-system |
951bc45f PE |
258 | (let ((c (intern (downcase current-language-environment)))) |
259 | (if (coding-system-p c) c 'latin-1)))) | |
eb72c1bd | 260 | (standard-display-european-internal))) |
798aa8d0 | 261 | |
a2535589 | 262 | (provide 'disp-table) |
c0274f38 | 263 | |
178f6d1f | 264 | ;; arch-tag: ffe4c28c-960c-47aa-b8a8-ae89d371ffc7 |
c0274f38 | 265 | ;;; disp-table.el ends here |