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102 lines
3.8 KiB
C
102 lines
3.8 KiB
C
/* Things for GLYPHS and glyph tables.
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Copyright (C) 1993 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 2, or (at your option)
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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; see the file COPYING. If not, write to
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the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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/* Access the slots of a display-table, according to their purpose. */
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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 P_ ((struct Lisp_Char_Table *, int));
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#define DISP_CHAR_VECTOR(dp, c) \
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(SINGLE_BYTE_CHAR_P(c) ? (dp)->contents[c] : 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 P_ ((struct window *));
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/* Defined in indent.c. */
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extern struct Lisp_Char_Table *buffer_display_table P_ ((void));
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/* Display table to use for vectors that don't specify their own. */
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extern Lisp_Object Vstandard_display_table;
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/* This is the `purpose' slot of a display table. */
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extern Lisp_Object Qdisplay_table;
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/* Vector of GLYPH definitions. Indexed by GLYPH number,
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the contents are a string which is how to output the GLYPH. */
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extern Lisp_Object Vglyph_table;
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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)) ? XVECTOR (Vglyph_table)->size : 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) ((g) >= (len) || !STRINGP (base[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) ((g) < (len) && INTEGERP (base[g]))
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/* Assuming that GLYPH_SIMPLE_P (BASE, LEN, G) is 1,
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return the alias for G. */
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#define GLYPH_ALIAS(base, g) XINT (base[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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(g) = GLYPH_ALIAS ((base), (g)); \
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if (!GLYPH_CHAR_VALID_P (FAST_GLYPH_CHAR (g))) \
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g = FAST_MAKE_GLYPH (' ', FAST_GLYPH_FACE (g)); \
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} while (0)
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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) XSTRING (base[g])->size
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#define GLYPH_STRING(base,g) XSTRING (base[g])->data
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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 GLYPH_FROM_CHAR(c) (c)
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