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d427b66a | 1 | /* Things for GLYPHS and glyph tables. |
73b0cd50 | 2 | Copyright (C) 1993, 2001-2011 Free Software Foundation, Inc. |
d427b66a JB |
3 | |
4 | This file is part of GNU Emacs. | |
5 | ||
b9b1cc14 | 6 | GNU Emacs is free software: you can redistribute it and/or modify |
d427b66a | 7 | it under the terms of the GNU General Public License as published by |
b9b1cc14 GM |
8 | the Free Software Foundation, either version 3 of the License, or |
9 | (at your option) any later version. | |
d427b66a JB |
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 | |
b9b1cc14 | 17 | along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */ |
d427b66a JB |
18 | |
19 | /* Access the slots of a display-table, according to their purpose. */ | |
20 | ||
80af4e50 RS |
21 | #define DISP_TABLE_P(obj) \ |
22 | (CHAR_TABLE_P (obj) \ | |
10ffbb91 | 23 | && EQ (XCHAR_TABLE (obj)->purpose, Qdisplay_table) \ |
80af4e50 RS |
24 | && CHAR_TABLE_EXTRA_SLOTS (XCHAR_TABLE (obj)) == DISP_TABLE_EXTRA_SLOTS) |
25 | ||
26 | #define DISP_TABLE_EXTRA_SLOTS 6 | |
27 | #define DISP_TRUNC_GLYPH(dp) ((dp)->extras[0]) | |
28 | #define DISP_CONTINUE_GLYPH(dp) ((dp)->extras[1]) | |
29 | #define DISP_ESCAPE_GLYPH(dp) ((dp)->extras[2]) | |
30 | #define DISP_CTRL_GLYPH(dp) ((dp)->extras[3]) | |
31 | #define DISP_INVIS_VECTOR(dp) ((dp)->extras[4]) | |
32 | #define DISP_BORDER_GLYPH(dp) ((dp)->extras[5]) | |
33 | ||
383e0970 | 34 | extern Lisp_Object disp_char_vector (struct Lisp_Char_Table *, int); |
1e05cf1d | 35 | |
f35dca99 KH |
36 | #define DISP_CHAR_VECTOR(dp, c) \ |
37 | (ASCII_CHAR_P(c) \ | |
38 | ? (NILP ((dp)->ascii) \ | |
39 | ? (dp)->defalt \ | |
40 | : (SUB_CHAR_TABLE_P ((dp)->ascii) \ | |
41 | ? XSUB_CHAR_TABLE ((dp)->ascii)->contents[c] \ | |
42 | : (dp)->ascii)) \ | |
43 | : disp_char_vector ((dp), (c))) | |
d427b66a | 44 | |
ef5623ef | 45 | /* Defined in window.c. */ |
383e0970 | 46 | extern struct Lisp_Char_Table *window_display_table (struct window *); |
ef5623ef JB |
47 | |
48 | /* Defined in indent.c. */ | |
383e0970 | 49 | extern struct Lisp_Char_Table *buffer_display_table (void); |
d427b66a | 50 | |
80af4e50 RS |
51 | /* This is the `purpose' slot of a display table. */ |
52 | extern Lisp_Object Qdisplay_table; | |
53 | ||
d427b66a JB |
54 | /* Return the current length of the GLYPH table, |
55 | or 0 if the table isn't currently valid. */ | |
56 | #define GLYPH_TABLE_LENGTH \ | |
40de0d7b | 57 | ((VECTORP (Vglyph_table)) ? XVECTOR (Vglyph_table)->size : 0) |
d427b66a JB |
58 | |
59 | /* Return the current base (for indexing) of the GLYPH table, | |
60 | or 0 if the table isn't currently valid. */ | |
61 | #define GLYPH_TABLE_BASE \ | |
40de0d7b | 62 | ((VECTORP (Vglyph_table)) ? XVECTOR (Vglyph_table)->contents : 0) |
d427b66a JB |
63 | |
64 | /* Given BASE and LEN returned by the two previous macros, | |
65 | return nonzero if the GLYPH code G should be output as a single | |
66 | character with code G. Return zero if G has a string in the table. */ | |
ea92fc1a KS |
67 | #define GLYPH_SIMPLE_P(base,len,g) \ |
68 | (GLYPH_FACE (g) != DEFAULT_FACE_ID || GLYPH_CHAR (g) >= (len) || !STRINGP (base[GLYPH_CHAR (g)])) | |
d427b66a JB |
69 | |
70 | /* Given BASE and LEN returned by the two previous macros, | |
71 | return nonzero if GLYPH code G is aliased to a different code. */ | |
ea92fc1a KS |
72 | #define GLYPH_ALIAS_P(base,len,g) \ |
73 | (GLYPH_FACE (g) == DEFAULT_FACE_ID && GLYPH_CHAR (g) < (len) && INTEGERP (base[GLYPH_CHAR (g)])) | |
d427b66a | 74 | |
be269961 JB |
75 | /* Follow all aliases for G in the glyph table given by (BASE, |
76 | LENGTH), and set G to the final glyph. */ | |
ea92fc1a KS |
77 | #define GLYPH_FOLLOW_ALIASES(base, length, g) \ |
78 | do { \ | |
79 | while (GLYPH_ALIAS_P ((base), (length), (g))) \ | |
80 | SET_GLYPH_CHAR ((g), XINT ((base)[GLYPH_CHAR (g)])); \ | |
81 | if (!GLYPH_CHAR_VALID_P (g)) \ | |
82 | SET_GLYPH_CHAR (g, ' '); \ | |
cd49fad3 KH |
83 | } while (0) |
84 | ||
d427b66a JB |
85 | /* Assuming that GLYPH_SIMPLE_P (BASE, LEN, G) is 0, |
86 | return the length and the address of the character-sequence | |
87 | used for outputting GLYPH G. */ | |
ea92fc1a KS |
88 | #define GLYPH_LENGTH(base,g) SCHARS (base[GLYPH_CHAR (g)]) |
89 | #define GLYPH_STRING(base,g) SDATA (base[GLYPH_CHAR (g)]) | |
d427b66a JB |
90 | |
91 | /* GLYPH for a space character. */ | |
92 | ||
93 | #define SPACEGLYPH 040 | |
94 | #define NULL_GLYPH 00 | |
95 | ||
ea92fc1a KS |
96 | #define SET_GLYPH_FROM_CHAR(glyph, c) \ |
97 | SET_GLYPH (glyph, c, DEFAULT_FACE_ID) | |
6b61353c | 98 |