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d427b66a | 1 | /* Things for GLYPHS and glyph tables. |
c6c5df7f | 2 | Copyright (C) 1993 Free Software Foundation, Inc. |
d427b66a JB |
3 | |
4 | This file is part of GNU Emacs. | |
5 | ||
6 | GNU Emacs is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
7c938215 | 8 | the Free Software Foundation; either version 2, or (at your option) |
d427b66a JB |
9 | any later version. |
10 | ||
11 | GNU Emacs is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with GNU Emacs; see the file COPYING. If not, write to | |
3b7ad313 EN |
18 | the Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
19 | Boston, MA 02111-1307, USA. */ | |
d427b66a JB |
20 | |
21 | /* Access the slots of a display-table, according to their purpose. */ | |
22 | ||
80af4e50 RS |
23 | #define DISP_TABLE_P(obj) \ |
24 | (CHAR_TABLE_P (obj) \ | |
10ffbb91 | 25 | && EQ (XCHAR_TABLE (obj)->purpose, Qdisplay_table) \ |
80af4e50 RS |
26 | && CHAR_TABLE_EXTRA_SLOTS (XCHAR_TABLE (obj)) == DISP_TABLE_EXTRA_SLOTS) |
27 | ||
28 | #define DISP_TABLE_EXTRA_SLOTS 6 | |
29 | #define DISP_TRUNC_GLYPH(dp) ((dp)->extras[0]) | |
30 | #define DISP_CONTINUE_GLYPH(dp) ((dp)->extras[1]) | |
31 | #define DISP_ESCAPE_GLYPH(dp) ((dp)->extras[2]) | |
32 | #define DISP_CTRL_GLYPH(dp) ((dp)->extras[3]) | |
33 | #define DISP_INVIS_VECTOR(dp) ((dp)->extras[4]) | |
34 | #define DISP_BORDER_GLYPH(dp) ((dp)->extras[5]) | |
35 | ||
9b854db0 | 36 | extern Lisp_Object disp_char_vector P_ ((struct Lisp_Char_Table *, int)); |
1e05cf1d | 37 | |
3046d6fc | 38 | #define DISP_CHAR_VECTOR(dp, c) \ |
1e05cf1d | 39 | (SINGLE_BYTE_CHAR_P(c) ? (dp)->contents[c] : disp_char_vector ((dp), (c))) |
d427b66a | 40 | |
ef5623ef | 41 | /* Defined in window.c. */ |
9b854db0 | 42 | extern struct Lisp_Char_Table *window_display_table P_ ((struct window *)); |
ef5623ef JB |
43 | |
44 | /* Defined in indent.c. */ | |
9b854db0 | 45 | extern struct Lisp_Char_Table *buffer_display_table P_ ((void)); |
d427b66a JB |
46 | |
47 | /* Display table to use for vectors that don't specify their own. */ | |
48 | extern Lisp_Object Vstandard_display_table; | |
49 | ||
80af4e50 RS |
50 | /* This is the `purpose' slot of a display table. */ |
51 | extern Lisp_Object Qdisplay_table; | |
52 | ||
d427b66a JB |
53 | /* Vector of GLYPH definitions. Indexed by GLYPH number, |
54 | the contents are a string which is how to output the GLYPH. */ | |
55 | extern Lisp_Object Vglyph_table; | |
56 | ||
57 | /* Return the current length of the GLYPH table, | |
58 | or 0 if the table isn't currently valid. */ | |
59 | #define GLYPH_TABLE_LENGTH \ | |
40de0d7b | 60 | ((VECTORP (Vglyph_table)) ? XVECTOR (Vglyph_table)->size : 0) |
d427b66a JB |
61 | |
62 | /* Return the current base (for indexing) of the GLYPH table, | |
63 | or 0 if the table isn't currently valid. */ | |
64 | #define GLYPH_TABLE_BASE \ | |
40de0d7b | 65 | ((VECTORP (Vglyph_table)) ? XVECTOR (Vglyph_table)->contents : 0) |
d427b66a JB |
66 | |
67 | /* Given BASE and LEN returned by the two previous macros, | |
68 | return nonzero if the GLYPH code G should be output as a single | |
69 | character with code G. Return zero if G has a string in the table. */ | |
40de0d7b | 70 | #define GLYPH_SIMPLE_P(base,len,g) ((g) >= (len) || !STRINGP (base[g])) |
d427b66a JB |
71 | |
72 | /* Given BASE and LEN returned by the two previous macros, | |
73 | return nonzero if GLYPH code G is aliased to a different code. */ | |
40de0d7b | 74 | #define GLYPH_ALIAS_P(base,len,g) ((g) < (len) && INTEGERP (base[g])) |
d427b66a JB |
75 | |
76 | /* Assuming that GLYPH_SIMPLE_P (BASE, LEN, G) is 1, | |
77 | return the alias for G. */ | |
78 | #define GLYPH_ALIAS(base, g) XINT (base[g]) | |
79 | ||
be269961 JB |
80 | /* Follow all aliases for G in the glyph table given by (BASE, |
81 | LENGTH), and set G to the final glyph. */ | |
cd49fad3 KH |
82 | #define GLYPH_FOLLOW_ALIASES(base, length, g) \ |
83 | do { \ | |
84 | while (GLYPH_ALIAS_P ((base), (length), (g))) \ | |
85 | (g) = GLYPH_ALIAS ((base), (g)); \ | |
86 | if (!GLYPH_CHAR_VALID_P (FAST_GLYPH_CHAR (g))) \ | |
87 | g = FAST_MAKE_GLYPH (' ', FAST_GLYPH_FACE (g)); \ | |
88 | } while (0) | |
89 | ||
d427b66a JB |
90 | /* Assuming that GLYPH_SIMPLE_P (BASE, LEN, G) is 0, |
91 | return the length and the address of the character-sequence | |
92 | used for outputting GLYPH G. */ | |
d5db4077 KR |
93 | #define GLYPH_LENGTH(base,g) SCHARS (base[g]) |
94 | #define GLYPH_STRING(base,g) SDATA (base[g]) | |
d427b66a JB |
95 | |
96 | /* GLYPH for a space character. */ | |
97 | ||
98 | #define SPACEGLYPH 040 | |
99 | #define NULL_GLYPH 00 | |
100 | ||
101 | #define GLYPH_FROM_CHAR(c) (c) | |
ab5796a9 MB |
102 | |
103 | /* arch-tag: d7f792d2-f59c-4904-a91e-91522e3ab349 | |
104 | (do not change this comment) */ |