1/* Things for GLYPHS and glyph tables. 2 Copyright (C) 1993, 2001, 2002, 2003, 2004, 2005, 3 2006, 2007 Free Software Foundation, Inc. 4 5This file is part of GNU Emacs. 6 7GNU Emacs is free software; you can redistribute it and/or modify 8it under the terms of the GNU General Public License as published by 9the Free Software Foundation; either version 2, or (at your option) 10any later version. 11 12GNU Emacs is distributed in the hope that it will be useful, 13but WITHOUT ANY WARRANTY; without even the implied warranty of 14MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15GNU General Public License for more details. 16 17You should have received a copy of the GNU General Public License 18along with GNU Emacs; see the file COPYING. If not, write to 19the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, 20Boston, MA 02110-1301, USA. */ 21 22/* Access the slots of a display-table, according to their purpose. */ 23 24#define DISP_TABLE_P(obj) \ 25 (CHAR_TABLE_P (obj) \ 26 && EQ (XCHAR_TABLE (obj)->purpose, Qdisplay_table) \ 27 && CHAR_TABLE_EXTRA_SLOTS (XCHAR_TABLE (obj)) == DISP_TABLE_EXTRA_SLOTS) 28 29#define DISP_TABLE_EXTRA_SLOTS 6 30#define DISP_TRUNC_GLYPH(dp) ((dp)->extras[0]) 31#define DISP_CONTINUE_GLYPH(dp) ((dp)->extras[1]) 32#define DISP_ESCAPE_GLYPH(dp) ((dp)->extras[2]) 33#define DISP_CTRL_GLYPH(dp) ((dp)->extras[3]) 34#define DISP_INVIS_VECTOR(dp) ((dp)->extras[4]) 35#define DISP_BORDER_GLYPH(dp) ((dp)->extras[5]) 36 37extern Lisp_Object disp_char_vector P_ ((struct Lisp_Char_Table *, int)); 38 39#define DISP_CHAR_VECTOR(dp, c) \ 40 (SINGLE_BYTE_CHAR_P(c) ? (dp)->contents[c] : disp_char_vector ((dp), (c))) 41 42/* Defined in window.c. */ 43extern struct Lisp_Char_Table *window_display_table P_ ((struct window *)); 44 45/* Defined in indent.c. */ 46extern struct Lisp_Char_Table *buffer_display_table P_ ((void)); 47 48/* Display table to use for vectors that don't specify their own. */ 49extern Lisp_Object Vstandard_display_table; 50 51/* This is the `purpose' slot of a display table. */ 52extern Lisp_Object Qdisplay_table; 53 54/* Vector of GLYPH definitions. Indexed by GLYPH number, 55 the contents are a string which is how to output the GLYPH. */ 56extern Lisp_Object Vglyph_table; 57 58/* Return the current length of the GLYPH table, 59 or 0 if the table isn't currently valid. */ 60#define GLYPH_TABLE_LENGTH \ 61 ((VECTORP (Vglyph_table)) ? XVECTOR (Vglyph_table)->size : 0) 62 63/* Return the current base (for indexing) of the GLYPH table, 64 or 0 if the table isn't currently valid. */ 65#define GLYPH_TABLE_BASE \ 66 ((VECTORP (Vglyph_table)) ? XVECTOR (Vglyph_table)->contents : 0) 67 68/* Given BASE and LEN returned by the two previous macros, 69 return nonzero if the GLYPH code G should be output as a single 70 character with code G. Return zero if G has a string in the table. */ 71#define GLYPH_SIMPLE_P(base,len,g) ((g) >= (len) || !STRINGP (base[g])) 72 73/* Given BASE and LEN returned by the two previous macros, 74 return nonzero if GLYPH code G is aliased to a different code. */ 75#define GLYPH_ALIAS_P(base,len,g) ((g) < (len) && INTEGERP (base[g])) 76 77/* Assuming that GLYPH_SIMPLE_P (BASE, LEN, G) is 1, 78 return the alias for G. */ 79#define GLYPH_ALIAS(base, g) XINT (base[g]) 80 81/* Follow all aliases for G in the glyph table given by (BASE, 82 LENGTH), and set G to the final glyph. */ 83#define GLYPH_FOLLOW_ALIASES(base, length, g) \ 84 do { \ 85 while (GLYPH_ALIAS_P ((base), (length), (g))) \ 86 (g) = GLYPH_ALIAS ((base), (g)); \ 87 if (!GLYPH_CHAR_VALID_P (FAST_GLYPH_CHAR (g))) \ 88 g = FAST_MAKE_GLYPH (' ', FAST_GLYPH_FACE (g)); \ 89 } while (0) 90 91/* Assuming that GLYPH_SIMPLE_P (BASE, LEN, G) is 0, 92 return the length and the address of the character-sequence 93 used for outputting GLYPH G. */ 94#define GLYPH_LENGTH(base,g) SCHARS (base[g]) 95#define GLYPH_STRING(base,g) SDATA (base[g]) 96 97/* GLYPH for a space character. */ 98 99#define SPACEGLYPH 040 100#define NULL_GLYPH 00 101 102#define GLYPH_FROM_CHAR(c) (c) 103 104/* arch-tag: d7f792d2-f59c-4904-a91e-91522e3ab349 105 (do not change this comment) */ 106