102 lines
3.7 KiB
C
102 lines
3.7 KiB
C
/* Things for GLYPHS and glyph tables.
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Copyright (C) 1993, 2001-2024 Free Software Foundation, Inc.
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This file is part of GNU Emacs.
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GNU Emacs is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or (at
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your option) any later version.
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GNU Emacs is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Emacs. If not, see <https://www.gnu.org/licenses/>. */
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/* Access the slots of a display-table, according to their purpose. */
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#ifndef EMACS_DISPTAB_H
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#define EMACS_DISPTAB_H
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#include "lisp.h"
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#define DISP_TABLE_P(obj) \
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(CHAR_TABLE_P (obj) \
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&& EQ (XCHAR_TABLE (obj)->purpose, Qdisplay_table) \
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&& CHAR_TABLE_EXTRA_SLOTS (XCHAR_TABLE (obj)) == DISP_TABLE_EXTRA_SLOTS)
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#define DISP_TABLE_EXTRA_SLOTS 6
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#define DISP_TRUNC_GLYPH(dp) ((dp)->extras[0])
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#define DISP_CONTINUE_GLYPH(dp) ((dp)->extras[1])
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#define DISP_ESCAPE_GLYPH(dp) ((dp)->extras[2])
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#define DISP_CTRL_GLYPH(dp) ((dp)->extras[3])
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#define DISP_INVIS_VECTOR(dp) ((dp)->extras[4])
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#define DISP_BORDER_GLYPH(dp) ((dp)->extras[5])
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extern Lisp_Object disp_char_vector (struct Lisp_Char_Table *, int);
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#define DISP_CHAR_VECTOR(dp, c) \
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(ASCII_CHAR_P (c) \
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? (NILP ((dp)->ascii) \
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? (dp)->defalt \
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: (SUB_CHAR_TABLE_P ((dp)->ascii) \
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? XSUB_CHAR_TABLE ((dp)->ascii)->contents[c] \
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: (dp)->ascii)) \
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: disp_char_vector (dp, c))
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/* Defined in window.c. */
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extern struct Lisp_Char_Table *window_display_table (struct window *);
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/* Defined in indent.c. */
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extern struct Lisp_Char_Table *buffer_display_table (void);
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/* Return the current length of the GLYPH table,
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or 0 if the table isn't currently valid. */
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#define GLYPH_TABLE_LENGTH \
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((VECTORP (Vglyph_table)) ? ASIZE (Vglyph_table) : 0)
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/* Return the current base (for indexing) of the GLYPH table,
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or 0 if the table isn't currently valid. */
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#define GLYPH_TABLE_BASE \
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((VECTORP (Vglyph_table)) ? XVECTOR (Vglyph_table)->contents : 0)
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/* Given BASE and LEN returned by the two previous macros,
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return nonzero if the GLYPH code G should be output as a single
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character with code G. Return zero if G has a string in the table. */
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#define GLYPH_SIMPLE_P(base,len,g) \
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(GLYPH_FACE (g) != DEFAULT_FACE_ID || GLYPH_CHAR (g) >= (len) || !STRINGP (base[GLYPH_CHAR (g)]))
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/* Given BASE and LEN returned by the two previous macros,
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return nonzero if GLYPH code G is aliased to a different code. */
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#define GLYPH_ALIAS_P(base,len,g) \
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(GLYPH_FACE (g) == DEFAULT_FACE_ID && GLYPH_CHAR (g) < (len) && FIXNUMP (base[GLYPH_CHAR (g)]))
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/* Follow all aliases for G in the glyph table given by (BASE,
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LENGTH), and set G to the final glyph. */
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#define GLYPH_FOLLOW_ALIASES(base, length, g) \
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do { \
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while (GLYPH_ALIAS_P (base, length, g)) \
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SET_GLYPH_CHAR (g, XFIXNUM ((base)[GLYPH_CHAR (g)])); \
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if (!GLYPH_CHAR_VALID_P (g)) \
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SET_GLYPH_CHAR (g, ' '); \
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} while (false)
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/* Assuming that GLYPH_SIMPLE_P (BASE, LEN, G) is 0,
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return the length and the address of the character-sequence
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used for outputting GLYPH G. */
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#define GLYPH_LENGTH(base,g) SCHARS (base[GLYPH_CHAR (g)])
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#define GLYPH_STRING(base,g) SDATA (base[GLYPH_CHAR (g)])
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/* GLYPH for a space character. */
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#define SPACEGLYPH 040
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#define NULL_GLYPH 00
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#define SET_GLYPH_FROM_CHAR(glyph, c) \
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SET_GLYPH (glyph, c, DEFAULT_FACE_ID)
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#endif /* EMACS_DISPTAB_H */
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