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1 | ;;; disp-table.el --- functions for dealing with char tables. |
2 | ||
9750e079 ER |
3 | ;; Copyright (C) 1987 Free Software Foundation, Inc. |
4 | ||
e5167999 ER |
5 | ;; Author: Howard Gayle |
6 | ;; Maintainer: FSF | |
9750e079 | 7 | ;; Keywords: i14n |
a2535589 JA |
8 | |
9 | ;; This file is part of GNU Emacs. | |
10 | ||
11 | ;; GNU Emacs is free software; you can redistribute it and/or modify | |
12 | ;; it under the terms of the GNU General Public License as published by | |
e5167999 | 13 | ;; the Free Software Foundation; either version 2, or (at your option) |
a2535589 JA |
14 | ;; any later version. |
15 | ||
16 | ;; GNU Emacs is distributed in the hope that it will be useful, | |
17 | ;; but WITHOUT ANY WARRANTY; without even the implied warranty of | |
18 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
19 | ;; GNU General Public License for more details. | |
20 | ||
21 | ;; You should have received a copy of the GNU General Public License | |
22 | ;; along with GNU Emacs; see the file COPYING. If not, write to | |
23 | ;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. | |
24 | ||
e5167999 | 25 | ;;; Code: |
a2535589 | 26 | |
e31b61e6 | 27 | (defun describe-display-table (dt) |
49116ac0 | 28 | "Describe the display table DT in a help buffer." |
a2535589 | 29 | (with-output-to-temp-buffer "*Help*" |
03131799 | 30 | (princ "\nTruncation glyph: ") |
a2535589 | 31 | (prin1 (aref dt 256)) |
03131799 | 32 | (princ "\nWrap glyph: ") |
a2535589 | 33 | (prin1 (aref dt 257)) |
03131799 | 34 | (princ "\nEscape glyph: ") |
a2535589 | 35 | (prin1 (aref dt 258)) |
03131799 | 36 | (princ "\nCtrl glyph: ") |
a2535589 | 37 | (prin1 (aref dt 259)) |
afb1e4b4 | 38 | (princ "\nSelective display glyph sequence: ") |
e31b61e6 | 39 | (prin1 (aref dt 260)) |
afb1e4b4 | 40 | (princ "\nCharacter display glyph sequences:\n") |
a2535589 JA |
41 | (let ((vector (make-vector 256 nil)) |
42 | (i 0)) | |
43 | (while (< i 256) | |
e31b61e6 | 44 | (aset vector i (aref dt i)) |
a2535589 JA |
45 | (setq i (1+ i))) |
46 | (describe-vector vector)) | |
47 | (print-help-return-message))) | |
48 | ||
e31b61e6 | 49 | ;;;###autoload |
a2535589 | 50 | (defun describe-current-display-table () |
49116ac0 | 51 | "Describe the display table in use in the selected window and buffer." |
a2535589 JA |
52 | (interactive) |
53 | (describe-display-table | |
54 | (or (window-display-table (selected-window)) | |
55 | buffer-display-table | |
56 | standard-display-table))) | |
57 | ||
e31b61e6 | 58 | ;;;###autoload |
a2535589 | 59 | (defun make-display-table () |
e31b61e6 | 60 | "Return a new, empty display table." |
a2535589 JA |
61 | (make-vector 261 nil)) |
62 | ||
e31b61e6 | 63 | ;;;###autoload |
a2535589 | 64 | (defun standard-display-8bit (l h) |
49116ac0 | 65 | "Display characters in the range L to H literally." |
a2535589 JA |
66 | (while (<= l h) |
67 | (if (and (>= l ?\ ) (< l 127)) | |
68 | (if standard-display-table (aset standard-display-table l nil)) | |
69 | (or standard-display-table | |
70 | (setq standard-display-table (make-vector 261 nil))) | |
afb1e4b4 | 71 | (aset standard-display-table l (vector l))) |
a2535589 JA |
72 | (setq l (1+ l)))) |
73 | ||
e31b61e6 | 74 | ;;;###autoload |
a2535589 JA |
75 | (defun standard-display-ascii (c s) |
76 | "Display character C using string S." | |
77 | (or standard-display-table | |
78 | (setq standard-display-table (make-vector 261 nil))) | |
82093c70 | 79 | (aset standard-display-table c (apply 'vector (append s nil)))) |
a2535589 | 80 | |
e31b61e6 | 81 | ;;;###autoload |
a2535589 JA |
82 | (defun standard-display-g1 (c sc) |
83 | "Display character C as character SC in the g1 character set." | |
84 | (or standard-display-table | |
85 | (setq standard-display-table (make-vector 261 nil))) | |
86 | (aset standard-display-table c | |
82093c70 | 87 | (vector (create-glyph (concat "\016" (char-to-string sc) "\017"))))) |
a2535589 | 88 | |
e31b61e6 | 89 | ;;;###autoload |
a2535589 JA |
90 | (defun standard-display-graphic (c gc) |
91 | "Display character C as character GC in graphics character set." | |
92 | (or standard-display-table | |
93 | (setq standard-display-table (make-vector 261 nil))) | |
94 | (aset standard-display-table c | |
82093c70 | 95 | (vector (create-glyph (concat "\e(0" (char-to-string gc) "\e(B"))))) |
a2535589 | 96 | |
e31b61e6 | 97 | ;;;###autoload |
a2535589 JA |
98 | (defun standard-display-underline (c uc) |
99 | "Display character C as character UC plus underlining." | |
100 | (or standard-display-table | |
101 | (setq standard-display-table (make-vector 261 nil))) | |
102 | (aset standard-display-table c | |
82093c70 | 103 | (vector (create-glyph (concat "\e[4m" (char-to-string uc) "\e[m"))))) |
03131799 RS |
104 | |
105 | ;; Allocate a glyph code to display by sending STRING to the terminal. | |
e31b61e6 | 106 | ;;;###autoload |
03131799 RS |
107 | (defun create-glyph (string) |
108 | (if (= (length glyph-table) 65536) | |
109 | (error "No free glyph codes remain")) | |
110 | (setq glyph-table (vconcat glyph-table (list string))) | |
111 | (1- (length glyph-table))) | |
a2535589 JA |
112 | |
113 | (provide 'disp-table) | |
c0274f38 ER |
114 | |
115 | ;;; disp-table.el ends here |