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[emacs.git] / src / fontset.c
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1 /* Fontset handler.
2 Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010
3 Free Software Foundation, Inc.
4 Copyright (C) 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004,
5 2005, 2006, 2007, 2008, 2009, 2010
6 National Institute of Advanced Industrial Science and Technology (AIST)
7 Registration Number H14PRO021
8 Copyright (C) 2003, 2006
9 National Institute of Advanced Industrial Science and Technology (AIST)
10 Registration Number H13PRO009
12 This file is part of GNU Emacs.
14 GNU Emacs is free software: you can redistribute it and/or modify
15 it under the terms of the GNU General Public License as published by
16 the Free Software Foundation, either version 3 of the License, or
17 (at your option) any later version.
19 GNU Emacs is distributed in the hope that it will be useful,
20 but WITHOUT ANY WARRANTY; without even the implied warranty of
21 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 GNU General Public License for more details.
24 You should have received a copy of the GNU General Public License
25 along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */
27 /* #define FONTSET_DEBUG */
29 #include <config.h>
30 #include <stdio.h>
31 #include <setjmp.h>
33 #include "lisp.h"
34 #include "blockinput.h"
35 #include "buffer.h"
36 #include "character.h"
37 #include "charset.h"
38 #include "ccl.h"
39 #include "keyboard.h"
40 #include "frame.h"
41 #include "dispextern.h"
42 #include "intervals.h"
43 #include "fontset.h"
44 #include "window.h"
45 #ifdef HAVE_X_WINDOWS
46 #include "xterm.h"
47 #endif
48 #ifdef WINDOWSNT
49 #include "w32term.h"
50 #endif
51 #ifdef HAVE_NS
52 #include "nsterm.h"
53 #endif
54 #include "termhooks.h"
56 #include "font.h"
58 #undef xassert
59 #ifdef FONTSET_DEBUG
60 #define xassert(X) do {if (!(X)) abort ();} while (0)
61 #undef INLINE
62 #define INLINE
63 #else /* not FONTSET_DEBUG */
64 #define xassert(X) (void) 0
65 #endif /* not FONTSET_DEBUG */
67 EXFUN (Fclear_face_cache, 1);
69 /* FONTSET
71 A fontset is a collection of font related information to give
72 similar appearance (style, etc) of characters. A fontset has two
73 roles. One is to use for the frame parameter `font' as if it is an
74 ASCII font. In that case, Emacs uses the font specified for
75 `ascii' script for the frame's default font.
77 Another role, the more important one, is to provide information
78 about which font to use for each non-ASCII character.
80 There are two kinds of fontsets; base and realized. A base fontset
81 is created by `new-fontset' from Emacs Lisp explicitly. A realized
82 fontset is created implicitly when a face is realized for ASCII
83 characters. A face is also realized for non-ASCII characters based
84 on an ASCII face. All of non-ASCII faces based on the same ASCII
85 face share the same realized fontset.
87 A fontset object is implemented by a char-table whose default value
88 and parent are always nil.
90 An element of a base fontset is a vector of FONT-DEFs which itself
91 is a vector [ FONT-SPEC ENCODING REPERTORY ].
93 An element of a realized fontset is nil, t, 0, or a vector of this
94 form:
96 [ CHARSET-ORDERED-LIST-TICK PREFERRED-RFONT-DEF
97 RFONT-DEF0 RFONT-DEF1 ... ]
99 RFONT-DEFn (i.e. Realized FONT-DEF) has this form:
101 [ FACE-ID FONT-DEF FONT-OBJECT SORTING-SCORE ]
103 RFONT-DEFn are automatically reordered by the current charset
104 priority list.
106 The value nil means that we have not yet generated the above vector
107 from the base of the fontset.
109 The value t means that no font is available for the corresponding
110 range of characters.
112 The value 0 means that no font is available for the corresponding
113 range of characters in this fontset, but may be available in the
114 default fontset.
117 A fontset has 9 extra slots.
119 The 1st slot: the ID number of the fontset
121 The 2nd slot:
122 base: the name of the fontset
123 realized: nil
125 The 3rd slot:
126 base: nil
127 realized: the base fontset
129 The 4th slot:
130 base: nil
131 realized: the frame that the fontset belongs to
133 The 5th slot:
134 base: the font name for ASCII characters
135 realized: nil
137 The 6th slot:
138 base: nil
139 realized: the ID number of a face to use for characters that
140 has no font in a realized fontset.
142 The 7th slot:
143 base: nil
144 realized: Alist of font index vs the corresponding repertory
145 char-table.
147 The 8th slot:
148 base: nil
149 realized: If the base is not the default fontset, a fontset
150 realized from the default fontset, else nil.
152 The 9th slot:
153 base: Same as element value (but for fallback fonts).
154 realized: Likewise.
156 All fontsets are recorded in the vector Vfontset_table.
159 DEFAULT FONTSET
161 There's a special base fontset named `default fontset' which
162 defines the default font specifications. When a base fontset
163 doesn't specify a font for a specific character, the corresponding
164 value in the default fontset is used.
166 The parent of a realized fontset created for such a face that has
167 no fontset is the default fontset.
170 These structures are hidden from the other codes than this file.
171 The other codes handle fontsets only by their ID numbers. They
172 usually use the variable name `fontset' for IDs. But, in this
173 file, we always use varialbe name `id' for IDs, and name `fontset'
174 for an actual fontset object, i.e., char-table.
178 /********** VARIABLES and FUNCTION PROTOTYPES **********/
180 extern Lisp_Object Qfont;
181 static Lisp_Object Qfontset;
182 static Lisp_Object Qfontset_info;
183 static Lisp_Object Qprepend, Qappend;
184 Lisp_Object Qlatin;
186 /* Vector containing all fontsets. */
187 static Lisp_Object Vfontset_table;
189 /* Next possibly free fontset ID. Usually this keeps the minimum
190 fontset ID not yet used. */
191 static int next_fontset_id;
193 /* The default fontset. This gives default FAMILY and REGISTRY of
194 font for each character. */
195 static Lisp_Object Vdefault_fontset;
197 Lisp_Object Vfont_encoding_charset_alist;
198 Lisp_Object Vuse_default_ascent;
199 Lisp_Object Vignore_relative_composition;
200 Lisp_Object Valternate_fontname_alist;
201 Lisp_Object Vfontset_alias_alist;
202 Lisp_Object Vvertical_centering_font_regexp;
203 Lisp_Object Votf_script_alist;
205 /* Check if any window system is used now. */
206 void (*check_window_system_func) P_ ((void));
209 /* Prototype declarations for static functions. */
210 static Lisp_Object fontset_add P_ ((Lisp_Object, Lisp_Object, Lisp_Object,
211 Lisp_Object));
212 static Lisp_Object fontset_find_font P_ ((Lisp_Object, int, struct face *,
213 int, int));
214 static void reorder_font_vector P_ ((Lisp_Object, struct font *));
215 static Lisp_Object fontset_font P_ ((Lisp_Object, int, struct face *, int));
216 static Lisp_Object make_fontset P_ ((Lisp_Object, Lisp_Object, Lisp_Object));
217 static Lisp_Object fontset_pattern_regexp P_ ((Lisp_Object));
218 static void accumulate_script_ranges P_ ((Lisp_Object, Lisp_Object,
219 Lisp_Object));
220 Lisp_Object find_font_encoding P_ ((Lisp_Object));
222 static void set_fontset_font P_ ((Lisp_Object, Lisp_Object));
224 #ifdef FONTSET_DEBUG
226 /* Return 1 if ID is a valid fontset id, else return 0. */
228 static int
229 fontset_id_valid_p (id)
230 int id;
232 return (id >= 0 && id < ASIZE (Vfontset_table) - 1);
235 #endif
239 /********** MACROS AND FUNCTIONS TO HANDLE FONTSET **********/
241 /* Return the fontset with ID. No check of ID's validness. */
242 #define FONTSET_FROM_ID(id) AREF (Vfontset_table, id)
244 /* Macros to access special values of FONTSET. */
245 #define FONTSET_ID(fontset) XCHAR_TABLE (fontset)->extras[0]
247 /* Macros to access special values of (base) FONTSET. */
248 #define FONTSET_NAME(fontset) XCHAR_TABLE (fontset)->extras[1]
249 #define FONTSET_ASCII(fontset) XCHAR_TABLE (fontset)->extras[4]
250 #define FONTSET_SPEC(fontset) XCHAR_TABLE (fontset)->extras[5]
252 /* Macros to access special values of (realized) FONTSET. */
253 #define FONTSET_BASE(fontset) XCHAR_TABLE (fontset)->extras[2]
254 #define FONTSET_FRAME(fontset) XCHAR_TABLE (fontset)->extras[3]
255 #define FONTSET_OBJLIST(fontset) XCHAR_TABLE (fontset)->extras[4]
256 #define FONTSET_NOFONT_FACE(fontset) XCHAR_TABLE (fontset)->extras[5]
257 #define FONTSET_REPERTORY(fontset) XCHAR_TABLE (fontset)->extras[6]
258 #define FONTSET_DEFAULT(fontset) XCHAR_TABLE (fontset)->extras[7]
260 /* For both base and realized fontset. */
261 #define FONTSET_FALLBACK(fontset) XCHAR_TABLE (fontset)->extras[8]
263 #define BASE_FONTSET_P(fontset) (NILP (FONTSET_BASE (fontset)))
266 /* Macros for FONT-DEF and RFONT-DEF of fontset. */
267 #define FONT_DEF_NEW(font_def, font_spec, encoding, repertory) \
268 do { \
269 (font_def) = Fmake_vector (make_number (3), (font_spec)); \
270 ASET ((font_def), 1, encoding); \
271 ASET ((font_def), 2, repertory); \
272 } while (0)
274 #define FONT_DEF_SPEC(font_def) AREF (font_def, 0)
275 #define FONT_DEF_ENCODING(font_def) AREF (font_def, 1)
276 #define FONT_DEF_REPERTORY(font_def) AREF (font_def, 2)
278 #define RFONT_DEF_FACE(rfont_def) AREF (rfont_def, 0)
279 #define RFONT_DEF_SET_FACE(rfont_def, face_id) \
280 ASET ((rfont_def), 0, make_number (face_id))
281 #define RFONT_DEF_FONT_DEF(rfont_def) AREF (rfont_def, 1)
282 #define RFONT_DEF_SPEC(rfont_def) FONT_DEF_SPEC (AREF (rfont_def, 1))
283 #define RFONT_DEF_REPERTORY(rfont_def) FONT_DEF_REPERTORY (AREF (rfont_def, 1))
284 #define RFONT_DEF_OBJECT(rfont_def) AREF (rfont_def, 2)
285 #define RFONT_DEF_SET_OBJECT(rfont_def, object) \
286 ASET ((rfont_def), 2, (object))
287 #define RFONT_DEF_SCORE(rfont_def) XINT (AREF (rfont_def, 3))
288 #define RFONT_DEF_SET_SCORE(rfont_def, score) \
289 ASET ((rfont_def), 3, make_number (score))
290 #define RFONT_DEF_NEW(rfont_def, font_def) \
291 do { \
292 (rfont_def) = Fmake_vector (make_number (4), Qnil); \
293 ASET ((rfont_def), 1, (font_def)); \
294 RFONT_DEF_SET_SCORE ((rfont_def), 0); \
295 } while (0)
298 /* Return the element of FONTSET for the character C. If FONTSET is a
299 base fontset other then the default fontset and FONTSET doesn't
300 contain information for C, return the information in the default
301 fontset. */
303 #define FONTSET_REF(fontset, c) \
304 (EQ (fontset, Vdefault_fontset) \
305 ? CHAR_TABLE_REF (fontset, c) \
306 : fontset_ref ((fontset), (c)))
308 static Lisp_Object
309 fontset_ref (fontset, c)
310 Lisp_Object fontset;
311 int c;
313 Lisp_Object elt;
315 elt = CHAR_TABLE_REF (fontset, c);
316 if (NILP (elt) && ! EQ (fontset, Vdefault_fontset)
317 /* Don't check Vdefault_fontset for a realized fontset. */
318 && NILP (FONTSET_BASE (fontset)))
319 elt = CHAR_TABLE_REF (Vdefault_fontset, c);
320 return elt;
323 /* Set elements of FONTSET for characters in RANGE to the value ELT.
324 RANGE is a cons (FROM . TO), where FROM and TO are character codes
325 specifying a range. */
327 #define FONTSET_SET(fontset, range, elt) \
328 Fset_char_table_range ((fontset), (range), (elt))
331 /* Modify the elements of FONTSET for characters in RANGE by replacing
332 with ELT or adding ELT. RANGE is a cons (FROM . TO), where FROM
333 and TO are character codes specifying a range. If ADD is nil,
334 replace with ELT, if ADD is `prepend', prepend ELT, otherwise,
335 append ELT. */
337 #define FONTSET_ADD(fontset, range, elt, add) \
338 (NILP (add) \
339 ? (NILP (range) \
340 ? (FONTSET_FALLBACK (fontset) = Fmake_vector (make_number (1), (elt))) \
341 : Fset_char_table_range ((fontset), (range), \
342 Fmake_vector (make_number (1), (elt)))) \
343 : fontset_add ((fontset), (range), (elt), (add)))
345 static Lisp_Object
346 fontset_add (fontset, range, elt, add)
347 Lisp_Object fontset, range, elt, add;
349 Lisp_Object args[2];
350 int idx = (EQ (add, Qappend) ? 0 : 1);
352 args[1 - idx] = Fmake_vector (make_number (1), elt);
354 if (CONSP (range))
356 int from = XINT (XCAR (range));
357 int to = XINT (XCDR (range));
358 int from1, to1;
360 do {
361 from1 = from, to1 = to;
362 args[idx] = char_table_ref_and_range (fontset, from, &from1, &to1);
363 char_table_set_range (fontset, from, to1,
364 NILP (args[idx]) ? args[1 - idx]
365 : Fvconcat (2, args));
366 from = to1 + 1;
367 } while (from < to);
369 else
371 args[idx] = FONTSET_FALLBACK (fontset);
372 FONTSET_FALLBACK (fontset)
373 = NILP (args[idx]) ? args[1 - idx] : Fvconcat (2, args);
375 return Qnil;
378 static int
379 fontset_compare_rfontdef (val1, val2)
380 const void *val1, *val2;
382 return (RFONT_DEF_SCORE (*(Lisp_Object *) val1)
383 - RFONT_DEF_SCORE (*(Lisp_Object *) val2));
386 /* Update FONT-GROUP which has this form:
387 [ CHARSET-ORDERED-LIST-TICK PREFERRED-RFONT-DEF
388 RFONT-DEF0 RFONT-DEF1 ... ]
389 Reorder RFONT-DEFs according to the current language, and update
390 CHARSET-ORDERED-LIST-TICK.
392 If PREFERRED_FAMILY is not nil, that family has the higher priority
393 if the encoding charsets or languages in font-specs are the same. */
395 extern Lisp_Object Fassoc_string ();
397 static void
398 reorder_font_vector (font_group, font)
399 Lisp_Object font_group;
400 struct font *font;
402 Lisp_Object vec, font_object;
403 int size;
404 int i;
405 int score_changed = 0;
407 if (font)
408 XSETFONT (font_object, font);
409 else
410 font_object = Qnil;
412 vec = XCDR (font_group);
413 size = ASIZE (vec);
414 /* Exclude the tailing nil element from the reordering. */
415 if (NILP (AREF (vec, size - 1)))
416 size--;
418 for (i = 0; i < size; i++)
420 Lisp_Object rfont_def = AREF (vec, i);
421 Lisp_Object font_def = RFONT_DEF_FONT_DEF (rfont_def);
422 Lisp_Object font_spec = FONT_DEF_SPEC (font_def);
423 int score = RFONT_DEF_SCORE (rfont_def) & 0xFF;
425 if (! font_match_p (font_spec, font_object))
427 Lisp_Object encoding = FONT_DEF_ENCODING (font_def);
429 if (! NILP (encoding))
431 Lisp_Object tail;
433 for (tail = Vcharset_ordered_list;
434 ! EQ (tail, Vcharset_non_preferred_head) && CONSP (tail);
435 score += 0x100, tail = XCDR (tail))
436 if (EQ (encoding, XCAR (tail)))
437 break;
439 else
441 Lisp_Object lang = Ffont_get (font_spec, QClang);
443 if (! NILP (lang)
444 && ! EQ (lang, Vcurrent_iso639_language)
445 && (! CONSP (Vcurrent_iso639_language)
446 || NILP (Fmemq (lang, Vcurrent_iso639_language))))
447 score |= 0x100;
450 if (RFONT_DEF_SCORE (rfont_def) != score)
452 RFONT_DEF_SET_SCORE (rfont_def, score);
453 score_changed = 1;
457 if (score_changed)
458 qsort (XVECTOR (vec)->contents, size, sizeof (Lisp_Object),
459 fontset_compare_rfontdef);
460 XSETCAR (font_group, make_number (charset_ordered_list_tick));
463 /* Return a font-group (actually a cons (-1 . FONT-GROUP-VECTOR)) for
464 character C in FONTSET. If C is -1, return a fallback font-group.
465 If C is not -1, the value may be Qt (FONTSET doesn't have a font
466 for C even in the fallback group, or 0 (a font for C may be found
467 only in the fallback group). */
469 static Lisp_Object
470 fontset_get_font_group (Lisp_Object fontset, int c)
472 Lisp_Object font_group;
473 Lisp_Object base_fontset;
474 int from = 0, to = MAX_CHAR, i;
476 xassert (! BASE_FONTSET_P (fontset));
477 if (c >= 0)
478 font_group = CHAR_TABLE_REF (fontset, c);
479 else
480 font_group = FONTSET_FALLBACK (fontset);
481 if (! NILP (font_group))
482 return font_group;
483 base_fontset = FONTSET_BASE (fontset);
484 if (c >= 0)
485 font_group = char_table_ref_and_range (base_fontset, c, &from, &to);
486 else
487 font_group = FONTSET_FALLBACK (base_fontset);
488 if (NILP (font_group))
490 font_group = make_number (0);
491 if (c >= 0)
492 char_table_set_range (fontset, from, to, font_group);
493 return font_group;
495 font_group = Fcopy_sequence (font_group);
496 for (i = 0; i < ASIZE (font_group); i++)
497 if (! NILP (AREF (font_group, i)))
499 Lisp_Object rfont_def;
501 RFONT_DEF_NEW (rfont_def, AREF (font_group, i));
502 /* Remember the original order. */
503 RFONT_DEF_SET_SCORE (rfont_def, i);
504 ASET (font_group, i, rfont_def);
506 font_group = Fcons (make_number (-1), font_group);
507 if (c >= 0)
508 char_table_set_range (fontset, from, to, font_group);
509 else
510 FONTSET_FALLBACK (fontset) = font_group;
511 return font_group;
514 /* Return RFONT-DEF (vector) in the realized fontset FONTSET for the
515 character C. If no font is found, return Qnil if there's a
516 possibility that the default fontset or the fallback font groups
517 have a proper font, and return Qt if not.
519 If a font is found but is not yet opened, open it (if FACE is not
520 NULL) or return Qnil (if FACE is NULL).
522 ID is a charset-id that must be preferred, or -1 meaning no
523 preference.
525 If FALLBACK is nonzero, search only fallback fonts. */
527 static Lisp_Object
528 fontset_find_font (fontset, c, face, id, fallback)
529 Lisp_Object fontset;
530 int c;
531 struct face *face;
532 int id, fallback;
534 Lisp_Object vec, font_group;
535 int i, charset_matched = 0, found_index;
536 FRAME_PTR f = (FRAMEP (FONTSET_FRAME (fontset))
537 ? XFRAME (FONTSET_FRAME (fontset)) : XFRAME (selected_frame));
538 Lisp_Object rfont_def;
540 font_group = fontset_get_font_group (fontset, fallback ? -1 : c);
541 if (! CONSP (font_group))
542 return font_group;
543 vec = XCDR (font_group);
544 if (ASIZE (vec) == 0)
545 return Qnil;
547 if (ASIZE (vec) > 1)
549 if (XINT (XCAR (font_group)) != charset_ordered_list_tick)
550 /* We have just created the font-group,
551 or the charset priorities were changed. */
552 reorder_font_vector (font_group, face->ascii_face->font);
553 if (id >= 0)
554 /* Find a spec matching with the charset ID to try at
555 first. */
556 for (i = 0; i < ASIZE (vec); i++)
558 Lisp_Object repertory;
560 rfont_def = AREF (vec, i);
561 if (NILP (rfont_def))
562 break;
563 repertory = FONT_DEF_REPERTORY (RFONT_DEF_FONT_DEF (rfont_def));
565 if (XINT (repertory) == id)
567 charset_matched = i;
568 break;
573 /* Find the first available font in the vector of RFONT-DEF. */
574 for (i = 0; i < ASIZE (vec); i++)
576 Lisp_Object font_def;
577 Lisp_Object font_entity, font_object;
579 found_index = i;
580 if (i == 0)
582 if (charset_matched > 0)
584 /* Try the element matching with the charset ID at first. */
585 found_index = charset_matched;
586 /* Make this negative so that we don't come here in the
587 next loop. */
588 charset_matched = - charset_matched;
589 /* We must try the first element in the next loop. */
590 i--;
593 else if (i == - charset_matched)
595 /* We have already tried this element and the followings
596 that have the same font specifications in the first
597 iteration. So, skip them all. */
598 rfont_def = AREF (vec, i);
599 font_def = RFONT_DEF_FONT_DEF (rfont_def);
600 for (; i + 1 < ASIZE (vec); i++)
602 rfont_def = AREF (vec, i + 1);
603 if (NILP (rfont_def))
604 break;
605 if (! EQ (RFONT_DEF_FONT_DEF (rfont_def), font_def))
606 break;
608 continue;
611 rfont_def = AREF (vec, found_index);
612 if (NILP (rfont_def))
614 if (i < 0)
615 continue;
616 /* This is a sign of not to try the other fonts. */
617 return Qt;
619 if (INTEGERP (RFONT_DEF_FACE (rfont_def))
620 && XINT (RFONT_DEF_FACE (rfont_def)) < 0)
621 /* We couldn't open this font last time. */
622 continue;
624 font_object = RFONT_DEF_OBJECT (rfont_def);
625 if (NILP (font_object))
627 font_def = RFONT_DEF_FONT_DEF (rfont_def);
629 if (! face)
630 /* We have not yet opened the font. */
631 return Qnil;
632 /* Find a font best-matching with the spec without checking
633 the support of the character C. That checking is costly,
634 and even without the checking, the found font supports C
635 in high possibility. */
636 font_entity = font_find_for_lface (f, face->lface,
637 FONT_DEF_SPEC (font_def), -1);
638 if (NILP (font_entity))
640 /* Record that no font matches the spec. */
641 RFONT_DEF_SET_FACE (rfont_def, -1);
642 continue;
644 font_object = font_open_for_lface (f, font_entity, face->lface,
645 FONT_DEF_SPEC (font_def));
646 if (NILP (font_object))
648 /* Something strange happened, perhaps because of a
649 Font-backend problem. Too avoid crashing, record
650 that this spec is unsable. It may be better to find
651 another font of the same spec, but currently we don't
652 have such an API. */
653 RFONT_DEF_SET_FACE (rfont_def, -1);
654 continue;
656 RFONT_DEF_SET_OBJECT (rfont_def, font_object);
659 if (font_has_char (f, font_object, c))
660 goto found;
662 /* Find a font already opened, maching with the current spec,
663 and supporting C. */
664 font_def = RFONT_DEF_FONT_DEF (rfont_def);
665 for (; found_index + 1 < ASIZE (vec); found_index++)
667 rfont_def = AREF (vec, found_index + 1);
668 if (NILP (rfont_def))
669 break;
670 if (! EQ (RFONT_DEF_FONT_DEF (rfont_def), font_def))
671 break;
672 font_object = RFONT_DEF_OBJECT (rfont_def);
673 if (! NILP (font_object) && font_has_char (f, font_object, c))
675 found_index++;
676 goto found;
680 /* Find a font-entity with the current spec and supporting C. */
681 font_entity = font_find_for_lface (f, face->lface,
682 FONT_DEF_SPEC (font_def), c);
683 if (! NILP (font_entity))
685 /* We found a font. Open it and insert a new element for
686 that font in VEC. */
687 Lisp_Object new_vec;
688 int j;
690 font_object = font_open_for_lface (f, font_entity, face->lface,
691 Qnil);
692 if (NILP (font_object))
693 continue;
694 RFONT_DEF_NEW (rfont_def, font_def);
695 RFONT_DEF_SET_OBJECT (rfont_def, font_object);
696 RFONT_DEF_SET_SCORE (rfont_def, RFONT_DEF_SCORE (rfont_def));
697 new_vec = Fmake_vector (make_number (ASIZE (vec) + 1), Qnil);
698 found_index++;
699 for (j = 0; j < found_index; j++)
700 ASET (new_vec, j, AREF (vec, j));
701 ASET (new_vec, j, rfont_def);
702 for (j++; j < ASIZE (new_vec); j++)
703 ASET (new_vec, j, AREF (vec, j - 1));
704 XSETCDR (font_group, new_vec);
705 vec = new_vec;
706 goto found;
708 if (i >= 0)
709 i = found_index;
712 FONTSET_SET (fontset, make_number (c), make_number (0));
713 return Qnil;
715 found:
716 if (fallback && found_index > 0)
718 /* The order of fonts in the fallback font-group is not that
719 important, and it is better to move the found font to the
720 first of the group so that the next try will find it
721 quickly. */
722 for (i = found_index; i > 0; i--)
723 ASET (vec, i, AREF (vec, i - 1));
724 ASET (vec, 0, rfont_def);
726 return rfont_def;
730 static Lisp_Object
731 fontset_font (fontset, c, face, id)
732 Lisp_Object fontset;
733 int c;
734 struct face *face;
735 int id;
737 Lisp_Object rfont_def, default_rfont_def;
738 Lisp_Object base_fontset;
740 /* Try a font-group of FONTSET. */
741 FONT_DEFERRED_LOG ("current fontset: font for", make_number (c), Qnil);
742 rfont_def = fontset_find_font (fontset, c, face, id, 0);
743 if (VECTORP (rfont_def))
744 return rfont_def;
745 if (NILP (rfont_def))
746 FONTSET_SET (fontset, make_number (c), make_number (0));
748 /* Try a font-group of the default fontset. */
749 base_fontset = FONTSET_BASE (fontset);
750 if (! EQ (base_fontset, Vdefault_fontset))
752 if (NILP (FONTSET_DEFAULT (fontset)))
753 FONTSET_DEFAULT (fontset)
754 = make_fontset (FONTSET_FRAME (fontset), Qnil, Vdefault_fontset);
755 FONT_DEFERRED_LOG ("default fontset: font for", make_number (c), Qnil);
756 default_rfont_def
757 = fontset_find_font (FONTSET_DEFAULT (fontset), c, face, id, 0);
758 if (VECTORP (default_rfont_def))
759 return default_rfont_def;
760 if (NILP (default_rfont_def))
761 FONTSET_SET (FONTSET_DEFAULT (fontset), make_number (c),
762 make_number (0));
765 /* Try a fallback font-group of FONTSET. */
766 if (! EQ (rfont_def, Qt))
768 FONT_DEFERRED_LOG ("current fallback: font for", make_number (c), Qnil);
769 rfont_def = fontset_find_font (fontset, c, face, id, 1);
770 if (VECTORP (rfont_def))
771 return rfont_def;
772 /* Remember that FONTSET has no font for C. */
773 FONTSET_SET (fontset, make_number (c), Qt);
776 /* Try a fallback font-group of the default fontset. */
777 if (! EQ (base_fontset, Vdefault_fontset)
778 && ! EQ (default_rfont_def, Qt))
780 FONT_DEFERRED_LOG ("default fallback: font for", make_number (c), Qnil);
781 rfont_def = fontset_find_font (FONTSET_DEFAULT (fontset), c, face, id, 1);
782 if (VECTORP (rfont_def))
783 return rfont_def;
784 /* Remember that the default fontset has no font for C. */
785 FONTSET_SET (FONTSET_DEFAULT (fontset), make_number (c), Qt);
788 return Qnil;
791 /* Return a newly created fontset with NAME. If BASE is nil, make a
792 base fontset. Otherwise make a realized fontset whose base is
793 BASE. */
795 static Lisp_Object
796 make_fontset (frame, name, base)
797 Lisp_Object frame, name, base;
799 Lisp_Object fontset;
800 int size = ASIZE (Vfontset_table);
801 int id = next_fontset_id;
803 /* Find a free slot in Vfontset_table. Usually, next_fontset_id is
804 the next available fontset ID. So it is expected that this loop
805 terminates quickly. In addition, as the last element of
806 Vfontset_table is always nil, we don't have to check the range of
807 id. */
808 while (!NILP (AREF (Vfontset_table, id))) id++;
810 if (id + 1 == size)
811 Vfontset_table = larger_vector (Vfontset_table, size + 32, Qnil);
813 fontset = Fmake_char_table (Qfontset, Qnil);
815 FONTSET_ID (fontset) = make_number (id);
816 if (NILP (base))
818 FONTSET_NAME (fontset) = name;
820 else
822 FONTSET_NAME (fontset) = Qnil;
823 FONTSET_FRAME (fontset) = frame;
824 FONTSET_BASE (fontset) = base;
827 ASET (Vfontset_table, id, fontset);
828 next_fontset_id = id + 1;
829 return fontset;
833 /********** INTERFACES TO xfaces.c, xfns.c, and dispextern.h **********/
835 /* Return the name of the fontset who has ID. */
837 Lisp_Object
838 fontset_name (id)
839 int id;
841 Lisp_Object fontset;
843 fontset = FONTSET_FROM_ID (id);
844 return FONTSET_NAME (fontset);
848 /* Return the ASCII font name of the fontset who has ID. */
850 Lisp_Object
851 fontset_ascii (id)
852 int id;
854 Lisp_Object fontset, elt;
856 fontset= FONTSET_FROM_ID (id);
857 elt = FONTSET_ASCII (fontset);
858 if (CONSP (elt))
859 elt = XCAR (elt);
860 return elt;
863 void
864 free_realized_fontset (f, fontset)
865 FRAME_PTR f;
866 Lisp_Object fontset;
868 Lisp_Object tail;
870 return;
871 for (tail = FONTSET_OBJLIST (fontset); CONSP (tail); tail = XCDR (tail))
873 xassert (FONT_OBJECT_P (XCAR (tail)));
874 font_close_object (f, XCAR (tail));
878 /* Free fontset of FACE defined on frame F. Called from
879 free_realized_face. */
881 void
882 free_face_fontset (f, face)
883 FRAME_PTR f;
884 struct face *face;
886 Lisp_Object fontset;
888 fontset = FONTSET_FROM_ID (face->fontset);
889 if (NILP (fontset))
890 return;
891 xassert (! BASE_FONTSET_P (fontset));
892 xassert (f == XFRAME (FONTSET_FRAME (fontset)));
893 free_realized_fontset (f, fontset);
894 ASET (Vfontset_table, face->fontset, Qnil);
895 if (face->fontset < next_fontset_id)
896 next_fontset_id = face->fontset;
897 if (! NILP (FONTSET_DEFAULT (fontset)))
899 int id = XINT (FONTSET_ID (FONTSET_DEFAULT (fontset)));
901 fontset = AREF (Vfontset_table, id);
902 xassert (!NILP (fontset) && ! BASE_FONTSET_P (fontset));
903 xassert (f == XFRAME (FONTSET_FRAME (fontset)));
904 free_realized_fontset (f, fontset);
905 ASET (Vfontset_table, id, Qnil);
906 if (id < next_fontset_id)
907 next_fontset_id = face->fontset;
909 face->fontset = -1;
913 /* Return 1 if FACE is suitable for displaying character C.
914 Otherwise return 0. Called from the macro FACE_SUITABLE_FOR_CHAR_P
915 when C is not an ASCII character. */
918 face_suitable_for_char_p (face, c)
919 struct face *face;
920 int c;
922 Lisp_Object fontset, rfont_def;
924 fontset = FONTSET_FROM_ID (face->fontset);
925 rfont_def = fontset_font (fontset, c, NULL, -1);
926 return (VECTORP (rfont_def)
927 && INTEGERP (RFONT_DEF_FACE (rfont_def))
928 && face->id == XINT (RFONT_DEF_FACE (rfont_def)));
932 /* Return ID of face suitable for displaying character C on frame F.
933 FACE must be reazlied for ASCII characters in advance. Called from
934 the macro FACE_FOR_CHAR. */
937 face_for_char (f, face, c, pos, object)
938 FRAME_PTR f;
939 struct face *face;
940 int c, pos;
941 Lisp_Object object;
943 Lisp_Object fontset, rfont_def, charset;
944 int face_id;
945 int id;
947 /* If face->fontset is negative (that happens when no font is found
948 for face), just return face->ascii_face because we can't do
949 anything. Perhaps, we should fix the callers to assure
950 that face->fontset is always valid. */
951 if (ASCII_CHAR_P (c) || face->fontset < 0)
952 return face->ascii_face->id;
954 xassert (fontset_id_valid_p (face->fontset));
955 fontset = FONTSET_FROM_ID (face->fontset);
956 xassert (!BASE_FONTSET_P (fontset));
958 if (pos < 0)
960 id = -1;
961 charset = Qnil;
963 else
965 charset = Fget_char_property (make_number (pos), Qcharset, object);
966 if (CHARSETP (charset))
968 Lisp_Object val;
970 val = assq_no_quit (charset, Vfont_encoding_charset_alist);
971 if (CONSP (val) && CHARSETP (XCDR (val)))
972 charset = XCDR (val);
973 id = XINT (CHARSET_SYMBOL_ID (charset));
975 else
976 id = -1;
979 rfont_def = fontset_font (fontset, c, face, id);
980 if (VECTORP (rfont_def))
982 if (INTEGERP (RFONT_DEF_FACE (rfont_def)))
983 face_id = XINT (RFONT_DEF_FACE (rfont_def));
984 else
986 Lisp_Object font_object;
988 font_object = RFONT_DEF_OBJECT (rfont_def);
989 face_id = face_for_font (f, font_object, face);
990 RFONT_DEF_SET_FACE (rfont_def, face_id);
993 else
995 if (INTEGERP (FONTSET_NOFONT_FACE (fontset)))
996 face_id = XINT (FONTSET_NOFONT_FACE (fontset));
997 else
999 face_id = face_for_font (f, Qnil, face);
1000 FONTSET_NOFONT_FACE (fontset) = make_number (face_id);
1003 xassert (face_id >= 0);
1004 return face_id;
1008 Lisp_Object
1009 font_for_char (face, c, pos, object)
1010 struct face *face;
1011 int c, pos;
1012 Lisp_Object object;
1014 Lisp_Object fontset, rfont_def, charset;
1015 int id;
1017 if (ASCII_CHAR_P (c))
1019 Lisp_Object font_object;
1021 XSETFONT (font_object, face->ascii_face->font);
1022 return font_object;
1025 xassert (fontset_id_valid_p (face->fontset));
1026 fontset = FONTSET_FROM_ID (face->fontset);
1027 xassert (!BASE_FONTSET_P (fontset));
1028 if (pos < 0)
1030 id = -1;
1031 charset = Qnil;
1033 else
1035 charset = Fget_char_property (make_number (pos), Qcharset, object);
1036 if (CHARSETP (charset))
1038 Lisp_Object val;
1040 val = assq_no_quit (charset, Vfont_encoding_charset_alist);
1041 if (CONSP (val) && CHARSETP (XCDR (val)))
1042 charset = XCDR (val);
1043 id = XINT (CHARSET_SYMBOL_ID (charset));
1045 else
1046 id = -1;
1049 rfont_def = fontset_font (fontset, c, face, id);
1050 return (VECTORP (rfont_def)
1051 ? RFONT_DEF_OBJECT (rfont_def)
1052 : Qnil);
1056 /* Make a realized fontset for ASCII face FACE on frame F from the
1057 base fontset BASE_FONTSET_ID. If BASE_FONTSET_ID is -1, use the
1058 default fontset as the base. Value is the id of the new fontset.
1059 Called from realize_x_face. */
1062 make_fontset_for_ascii_face (f, base_fontset_id, face)
1063 FRAME_PTR f;
1064 int base_fontset_id;
1065 struct face *face;
1067 Lisp_Object base_fontset, fontset, frame;
1069 XSETFRAME (frame, f);
1070 if (base_fontset_id >= 0)
1072 base_fontset = FONTSET_FROM_ID (base_fontset_id);
1073 if (!BASE_FONTSET_P (base_fontset))
1074 base_fontset = FONTSET_BASE (base_fontset);
1075 if (! BASE_FONTSET_P (base_fontset))
1076 abort ();
1078 else
1079 base_fontset = Vdefault_fontset;
1081 fontset = make_fontset (frame, Qnil, base_fontset);
1082 return XINT (FONTSET_ID (fontset));
1087 /* Cache data used by fontset_pattern_regexp. The car part is a
1088 pattern string containing at least one wild card, the cdr part is
1089 the corresponding regular expression. */
1090 static Lisp_Object Vcached_fontset_data;
1092 #define CACHED_FONTSET_NAME ((char *) SDATA (XCAR (Vcached_fontset_data)))
1093 #define CACHED_FONTSET_REGEX (XCDR (Vcached_fontset_data))
1095 /* If fontset name PATTERN contains any wild card, return regular
1096 expression corresponding to PATTERN. */
1098 static Lisp_Object
1099 fontset_pattern_regexp (pattern)
1100 Lisp_Object pattern;
1102 if (!index ((char *) SDATA (pattern), '*')
1103 && !index ((char *) SDATA (pattern), '?'))
1104 /* PATTERN does not contain any wild cards. */
1105 return Qnil;
1107 if (!CONSP (Vcached_fontset_data)
1108 || strcmp ((char *) SDATA (pattern), CACHED_FONTSET_NAME))
1110 /* We must at first update the cached data. */
1111 unsigned char *regex, *p0, *p1;
1112 int ndashes = 0, nstars = 0, nescs = 0;
1114 for (p0 = SDATA (pattern); *p0; p0++)
1116 if (*p0 == '-')
1117 ndashes++;
1118 else if (*p0 == '*')
1119 nstars++;
1120 else if (*p0 == '['
1121 || *p0 == '.' || *p0 == '\\'
1122 || *p0 == '+' || *p0 == '^'
1123 || *p0 == '$')
1124 nescs++;
1127 /* If PATTERN is not full XLFD we conert "*" to ".*". Otherwise
1128 we convert "*" to "[^-]*" which is much faster in regular
1129 expression matching. */
1130 if (ndashes < 14)
1131 p1 = regex = (unsigned char *) alloca (SBYTES (pattern) + 2 * nstars + 2 * nescs + 1);
1132 else
1133 p1 = regex = (unsigned char *) alloca (SBYTES (pattern) + 5 * nstars + 2 * nescs + 1);
1135 *p1++ = '^';
1136 for (p0 = SDATA (pattern); *p0; p0++)
1138 if (*p0 == '*')
1140 if (ndashes < 14)
1141 *p1++ = '.';
1142 else
1143 *p1++ = '[', *p1++ = '^', *p1++ = '-', *p1++ = ']';
1144 *p1++ = '*';
1146 else if (*p0 == '?')
1147 *p1++ = '.';
1148 else if (*p0 == '['
1149 || *p0 == '.' || *p0 == '\\'
1150 || *p0 == '+' || *p0 == '^'
1151 || *p0 == '$')
1152 *p1++ = '\\', *p1++ = *p0;
1153 else
1154 *p1++ = *p0;
1156 *p1++ = '$';
1157 *p1++ = 0;
1159 Vcached_fontset_data = Fcons (build_string ((char *) SDATA (pattern)),
1160 build_string ((char *) regex));
1163 return CACHED_FONTSET_REGEX;
1166 /* Return ID of the base fontset named NAME. If there's no such
1167 fontset, return -1. NAME_PATTERN specifies how to treat NAME as this:
1168 0: pattern containing '*' and '?' as wildcards
1169 1: regular expression
1170 2: literal fontset name
1174 fs_query_fontset (name, name_pattern)
1175 Lisp_Object name;
1176 int name_pattern;
1178 Lisp_Object tem;
1179 int i;
1181 name = Fdowncase (name);
1182 if (name_pattern != 1)
1184 tem = Frassoc (name, Vfontset_alias_alist);
1185 if (NILP (tem))
1186 tem = Fassoc (name, Vfontset_alias_alist);
1187 if (CONSP (tem) && STRINGP (XCAR (tem)))
1188 name = XCAR (tem);
1189 else if (name_pattern == 0)
1191 tem = fontset_pattern_regexp (name);
1192 if (STRINGP (tem))
1194 name = tem;
1195 name_pattern = 1;
1200 for (i = 0; i < ASIZE (Vfontset_table); i++)
1202 Lisp_Object fontset, this_name;
1204 fontset = FONTSET_FROM_ID (i);
1205 if (NILP (fontset)
1206 || !BASE_FONTSET_P (fontset))
1207 continue;
1209 this_name = FONTSET_NAME (fontset);
1210 if (name_pattern == 1
1211 ? fast_string_match_ignore_case (name, this_name) >= 0
1212 : !xstrcasecmp (SDATA (name), SDATA (this_name)))
1213 return i;
1215 return -1;
1219 DEFUN ("query-fontset", Fquery_fontset, Squery_fontset, 1, 2, 0,
1220 doc: /* Return the name of a fontset that matches PATTERN.
1221 The value is nil if there is no matching fontset.
1222 PATTERN can contain `*' or `?' as a wildcard
1223 just as X font name matching algorithm allows.
1224 If REGEXPP is non-nil, PATTERN is a regular expression. */)
1225 (pattern, regexpp)
1226 Lisp_Object pattern, regexpp;
1228 Lisp_Object fontset;
1229 int id;
1231 (*check_window_system_func) ();
1233 CHECK_STRING (pattern);
1235 if (SCHARS (pattern) == 0)
1236 return Qnil;
1238 id = fs_query_fontset (pattern, !NILP (regexpp));
1239 if (id < 0)
1240 return Qnil;
1242 fontset = FONTSET_FROM_ID (id);
1243 return FONTSET_NAME (fontset);
1246 /* Return a list of base fontset names matching PATTERN on frame F. */
1248 Lisp_Object
1249 list_fontsets (f, pattern, size)
1250 FRAME_PTR f;
1251 Lisp_Object pattern;
1252 int size;
1254 Lisp_Object frame, regexp, val;
1255 int id;
1257 XSETFRAME (frame, f);
1259 regexp = fontset_pattern_regexp (pattern);
1260 val = Qnil;
1262 for (id = 0; id < ASIZE (Vfontset_table); id++)
1264 Lisp_Object fontset, name;
1266 fontset = FONTSET_FROM_ID (id);
1267 if (NILP (fontset)
1268 || !BASE_FONTSET_P (fontset)
1269 || !EQ (frame, FONTSET_FRAME (fontset)))
1270 continue;
1271 name = FONTSET_NAME (fontset);
1273 if (STRINGP (regexp)
1274 ? (fast_string_match (regexp, name) < 0)
1275 : strcmp ((char *) SDATA (pattern), (char *) SDATA (name)))
1276 continue;
1278 val = Fcons (Fcopy_sequence (FONTSET_NAME (fontset)), val);
1281 return val;
1285 /* Free all realized fontsets whose base fontset is BASE. */
1287 static void
1288 free_realized_fontsets (base)
1289 Lisp_Object base;
1291 int id;
1293 #if 0
1294 /* For the moment, this doesn't work because free_realized_face
1295 doesn't remove FACE from a cache. Until we find a solution, we
1296 suppress this code, and simply use Fclear_face_cache even though
1297 that is not efficient. */
1298 BLOCK_INPUT;
1299 for (id = 0; id < ASIZE (Vfontset_table); id++)
1301 Lisp_Object this = AREF (Vfontset_table, id);
1303 if (EQ (FONTSET_BASE (this), base))
1305 Lisp_Object tail;
1307 for (tail = FONTSET_FACE_ALIST (this); CONSP (tail);
1308 tail = XCDR (tail))
1310 FRAME_PTR f = XFRAME (FONTSET_FRAME (this));
1311 int face_id = XINT (XCDR (XCAR (tail)));
1312 struct face *face = FACE_FROM_ID (f, face_id);
1314 /* Face THIS itself is also freed by the following call. */
1315 free_realized_face (f, face);
1319 UNBLOCK_INPUT;
1320 #else /* not 0 */
1321 /* But, we don't have to call Fclear_face_cache if no fontset has
1322 been realized from BASE. */
1323 for (id = 0; id < ASIZE (Vfontset_table); id++)
1325 Lisp_Object this = AREF (Vfontset_table, id);
1327 if (CHAR_TABLE_P (this) && EQ (FONTSET_BASE (this), base))
1329 Fclear_face_cache (Qt);
1330 break;
1333 #endif /* not 0 */
1337 /* Check validity of NAME as a fontset name and return the
1338 corresponding fontset. If not valid, signal an error.
1340 If NAME is t, return Vdefault_fontset. If NAME is nil, return the
1341 fontset of *FRAME.
1343 Set *FRAME to the actual frame. */
1345 static Lisp_Object
1346 check_fontset_name (name, frame)
1347 Lisp_Object name, *frame;
1349 int id;
1351 if (NILP (*frame))
1352 *frame = selected_frame;
1353 CHECK_LIVE_FRAME (*frame);
1355 if (EQ (name, Qt))
1356 return Vdefault_fontset;
1357 if (NILP (name))
1359 id = FRAME_FONTSET (XFRAME (*frame));
1361 else
1363 CHECK_STRING (name);
1364 /* First try NAME as literal. */
1365 id = fs_query_fontset (name, 2);
1366 if (id < 0)
1367 /* For backward compatibility, try again NAME as pattern. */
1368 id = fs_query_fontset (name, 0);
1369 if (id < 0)
1370 error ("Fontset `%s' does not exist", SDATA (name));
1372 return FONTSET_FROM_ID (id);
1375 static void
1376 accumulate_script_ranges (arg, range, val)
1377 Lisp_Object arg, range, val;
1379 if (EQ (XCAR (arg), val))
1381 if (CONSP (range))
1382 XSETCDR (arg, Fcons (Fcons (XCAR (range), XCDR (range)), XCDR (arg)));
1383 else
1384 XSETCDR (arg, Fcons (Fcons (range, range), XCDR (arg)));
1389 /* Callback function for map_charset_chars in Fset_fontset_font.
1390 ARG is a vector [ FONTSET FONT_DEF ADD ASCII SCRIPT_RANGE_LIST ].
1392 In FONTSET, set FONT_DEF in a fashion specified by ADD for
1393 characters in RANGE and ranges in SCRIPT_RANGE_LIST before RANGE.
1394 The consumed ranges are poped up from SCRIPT_RANGE_LIST, and the
1395 new SCRIPT_RANGE_LIST is stored in ARG.
1397 If ASCII is nil, don't set FONT_DEF for ASCII characters. It is
1398 assured that SCRIPT_RANGE_LIST doesn't contain ASCII in that
1399 case. */
1401 static void
1402 set_fontset_font (arg, range)
1403 Lisp_Object arg, range;
1405 Lisp_Object fontset, font_def, add, ascii, script_range_list;
1406 int from = XINT (XCAR (range)), to = XINT (XCDR (range));
1408 fontset = AREF (arg, 0);
1409 font_def = AREF (arg, 1);
1410 add = AREF (arg, 2);
1411 ascii = AREF (arg, 3);
1412 script_range_list = AREF (arg, 4);
1414 if (NILP (ascii) && from < 0x80)
1416 if (to < 0x80)
1417 return;
1418 from = 0x80;
1419 range = Fcons (make_number (0x80), XCDR (range));
1422 #define SCRIPT_FROM XINT (XCAR (XCAR (script_range_list)))
1423 #define SCRIPT_TO XINT (XCDR (XCAR (script_range_list)))
1424 #define POP_SCRIPT_RANGE() script_range_list = XCDR (script_range_list)
1426 for (; CONSP (script_range_list) && SCRIPT_TO < from; POP_SCRIPT_RANGE ())
1427 FONTSET_ADD (fontset, XCAR (script_range_list), font_def, add);
1428 if (CONSP (script_range_list))
1430 if (SCRIPT_FROM < from)
1431 range = Fcons (make_number (SCRIPT_FROM), XCDR (range));
1432 while (CONSP (script_range_list) && SCRIPT_TO <= to)
1433 POP_SCRIPT_RANGE ();
1434 if (CONSP (script_range_list) && SCRIPT_FROM <= to)
1435 XSETCAR (XCAR (script_range_list), make_number (to + 1));
1438 FONTSET_ADD (fontset, range, font_def, add);
1439 ASET (arg, 4, script_range_list);
1442 extern Lisp_Object QCfamily, QCregistry;
1443 static void update_auto_fontset_alist P_ ((Lisp_Object, Lisp_Object));
1446 DEFUN ("set-fontset-font", Fset_fontset_font, Sset_fontset_font, 3, 5, 0,
1447 doc: /*
1448 Modify fontset NAME to use FONT-SPEC for TARGET characters.
1450 NAME is a fontset name string, nil for the fontset of FRAME, or t for
1451 the default fontset.
1453 TARGET may be a cons; (FROM . TO), where FROM and TO are characters.
1454 In that case, use FONT-SPEC for all characters in the range FROM and
1455 TO (inclusive).
1457 TARGET may be a script name symbol. In that case, use FONT-SPEC for
1458 all characters that belong to the script.
1460 TARGET may be a charset. In that case, use FONT-SPEC for all
1461 characters in the charset.
1463 TARGET may be nil. In that case, use FONT-SPEC for any characters for
1464 that no FONT-SPEC is specified.
1466 FONT-SPEC may one of these:
1467 * A font-spec object made by the function `font-spec' (which see).
1468 * A cons (FAMILY . REGISTRY), where FAMILY is a font family name and
1469 REGISTRY is a font registry name. FAMILY may contain foundry
1470 name, and REGISTRY may contain encoding name.
1471 * A font name string.
1472 * nil, which explicitly specifies that there's no font for TARGET.
1474 Optional 4th argument FRAME is a frame or nil for the selected frame
1475 that is concerned in the case that NAME is nil.
1477 Optional 5th argument ADD, if non-nil, specifies how to add FONT-SPEC
1478 to the font specifications for TARGET previously set. If it is
1479 `prepend', FONT-SPEC is prepended. If it is `append', FONT-SPEC is
1480 appended. By default, FONT-SPEC overrides the previous settings. */)
1481 (name, target, font_spec, frame, add)
1482 Lisp_Object name, target, font_spec, frame, add;
1484 Lisp_Object fontset;
1485 Lisp_Object font_def, registry, family;
1486 Lisp_Object range_list;
1487 struct charset *charset = NULL;
1488 Lisp_Object fontname;
1489 int ascii_changed = 0;
1491 fontset = check_fontset_name (name, &frame);
1493 fontname = Qnil;
1494 if (CONSP (font_spec))
1496 Lisp_Object spec = Ffont_spec (0, NULL);
1498 font_parse_family_registry (XCAR (font_spec), XCDR (font_spec), spec);
1499 font_spec = spec;
1500 fontname = Ffont_xlfd_name (font_spec, Qnil);
1502 else if (STRINGP (font_spec))
1504 Lisp_Object args[2];
1505 extern Lisp_Object QCname;
1507 fontname = font_spec;
1508 args[0] = QCname;
1509 args[1] = font_spec;
1510 font_spec = Ffont_spec (2, args);
1512 else if (FONT_SPEC_P (font_spec))
1513 fontname = Ffont_xlfd_name (font_spec, Qnil);
1514 else if (! NILP (font_spec))
1515 Fsignal (Qfont, list2 (build_string ("Invalid font-spec"), font_spec));
1517 if (! NILP (font_spec))
1519 Lisp_Object encoding, repertory;
1521 family = AREF (font_spec, FONT_FAMILY_INDEX);
1522 if (! NILP (family) )
1523 family = SYMBOL_NAME (family);
1524 registry = AREF (font_spec, FONT_REGISTRY_INDEX);
1525 if (! NILP (registry))
1526 registry = Fdowncase (SYMBOL_NAME (registry));
1527 encoding = find_font_encoding (concat3 (family, build_string ("-"),
1528 registry));
1529 if (NILP (encoding))
1530 encoding = Qascii;
1532 if (SYMBOLP (encoding))
1534 CHECK_CHARSET (encoding);
1535 encoding = repertory = CHARSET_SYMBOL_ID (encoding);
1537 else
1539 repertory = XCDR (encoding);
1540 encoding = XCAR (encoding);
1541 CHECK_CHARSET (encoding);
1542 encoding = CHARSET_SYMBOL_ID (encoding);
1543 if (! NILP (repertory) && SYMBOLP (repertory))
1545 CHECK_CHARSET (repertory);
1546 repertory = CHARSET_SYMBOL_ID (repertory);
1549 FONT_DEF_NEW (font_def, font_spec, encoding, repertory);
1551 else
1552 font_def = Qnil;
1554 if (CHARACTERP (target))
1556 if (XFASTINT (target) < 0x80)
1557 error ("Can't set a font for partial ASCII range");
1558 range_list = Fcons (Fcons (target, target), Qnil);
1560 else if (CONSP (target))
1562 Lisp_Object from, to;
1564 from = Fcar (target);
1565 to = Fcdr (target);
1566 CHECK_CHARACTER (from);
1567 CHECK_CHARACTER (to);
1568 if (XFASTINT (from) < 0x80)
1570 if (XFASTINT (from) != 0 || XFASTINT (to) < 0x7F)
1571 error ("Can't set a font for partial ASCII range");
1572 ascii_changed = 1;
1574 range_list = Fcons (target, Qnil);
1576 else if (SYMBOLP (target) && !NILP (target))
1578 Lisp_Object script_list;
1579 Lisp_Object val;
1581 range_list = Qnil;
1582 script_list = XCHAR_TABLE (Vchar_script_table)->extras[0];
1583 if (! NILP (Fmemq (target, script_list)))
1585 if (EQ (target, Qlatin))
1586 ascii_changed = 1;
1587 val = Fcons (target, Qnil);
1588 map_char_table (accumulate_script_ranges, Qnil, Vchar_script_table,
1589 val);
1590 range_list = Fnreverse (XCDR (val));
1592 if (CHARSETP (target))
1594 CHECK_CHARSET_GET_CHARSET (target, charset);
1595 if (charset->ascii_compatible_p)
1596 ascii_changed = 1;
1598 else if (NILP (range_list))
1599 error ("Invalid script or charset name: %s",
1600 SDATA (SYMBOL_NAME (target)));
1602 else if (NILP (target))
1603 range_list = Fcons (Qnil, Qnil);
1604 else
1605 error ("Invalid target for setting a font");
1607 if (ascii_changed)
1609 Lisp_Object val;
1611 if (NILP (font_spec))
1612 error ("Can't set ASCII font to nil");
1613 val = CHAR_TABLE_REF (fontset, 0);
1614 if (! NILP (val) && EQ (add, Qappend))
1615 /* We are going to change just an additional font for ASCII. */
1616 ascii_changed = 0;
1619 if (charset)
1621 Lisp_Object arg;
1623 arg = Fmake_vector (make_number (5), Qnil);
1624 ASET (arg, 0, fontset);
1625 ASET (arg, 1, font_def);
1626 ASET (arg, 2, add);
1627 ASET (arg, 3, ascii_changed ? Qt : Qnil);
1628 ASET (arg, 4, range_list);
1630 map_charset_chars (set_fontset_font, Qnil, arg, charset,
1631 CHARSET_MIN_CODE (charset),
1632 CHARSET_MAX_CODE (charset));
1633 range_list = AREF (arg, 4);
1635 for (; CONSP (range_list); range_list = XCDR (range_list))
1636 FONTSET_ADD (fontset, XCAR (range_list), font_def, add);
1638 if (ascii_changed)
1640 Lisp_Object tail, frame, alist;
1641 int fontset_id = XINT (FONTSET_ID (fontset));
1643 FONTSET_ASCII (fontset) = fontname;
1644 name = FONTSET_NAME (fontset);
1645 FOR_EACH_FRAME (tail, frame)
1647 FRAME_PTR f = XFRAME (frame);
1648 Lisp_Object font_object;
1649 struct face *face;
1651 if (FRAME_INITIAL_P (f) || FRAME_TERMCAP_P (f))
1652 continue;
1653 if (fontset_id != FRAME_FONTSET (f))
1654 continue;
1655 face = FACE_FROM_ID (f, DEFAULT_FACE_ID);
1656 if (face)
1657 font_object = font_load_for_lface (f, face->lface, font_spec);
1658 else
1659 font_object = font_open_by_spec (f, font_spec);
1660 if (! NILP (font_object))
1662 update_auto_fontset_alist (font_object, fontset);
1663 alist = Fcons (Fcons (Qfont, Fcons (name, font_object)), Qnil);
1664 Fmodify_frame_parameters (frame, alist);
1669 /* Free all realized fontsets whose base is FONTSET. This way, the
1670 specified character(s) are surely redisplayed by a correct
1671 font. */
1672 free_realized_fontsets (fontset);
1674 return Qnil;
1678 DEFUN ("new-fontset", Fnew_fontset, Snew_fontset, 2, 2, 0,
1679 doc: /* Create a new fontset NAME from font information in FONTLIST.
1681 FONTLIST is an alist of scripts vs the corresponding font specification list.
1682 Each element of FONTLIST has the form (SCRIPT FONT-SPEC ...), where a
1683 character of SCRIPT is displayed by a font that matches one of
1684 FONT-SPEC.
1686 SCRIPT is a symbol that appears in the first extra slot of the
1687 char-table `char-script-table'.
1689 FONT-SPEC is a vector, a cons, or a string. See the documentation of
1690 `set-fontset-font' for the meaning. */)
1691 (name, fontlist)
1692 Lisp_Object name, fontlist;
1694 Lisp_Object fontset;
1695 int id;
1697 CHECK_STRING (name);
1698 CHECK_LIST (fontlist);
1700 name = Fdowncase (name);
1701 id = fs_query_fontset (name, 0);
1702 if (id < 0)
1704 Lisp_Object font_spec = Ffont_spec (0, NULL);
1705 Lisp_Object short_name;
1706 char xlfd[256];
1707 int len;
1709 if (font_parse_xlfd ((char *) SDATA (name), font_spec) < 0)
1710 error ("Fontset name must be in XLFD format");
1711 short_name = AREF (font_spec, FONT_REGISTRY_INDEX);
1712 if (strncmp ((char *) SDATA (SYMBOL_NAME (short_name)), "fontset-", 8)
1713 || SBYTES (SYMBOL_NAME (short_name)) < 9)
1714 error ("Registry field of fontset name must be \"fontset-*\"");
1715 Vfontset_alias_alist = Fcons (Fcons (name, SYMBOL_NAME (short_name)),
1716 Vfontset_alias_alist);
1717 ASET (font_spec, FONT_REGISTRY_INDEX, Qiso8859_1);
1718 fontset = make_fontset (Qnil, name, Qnil);
1719 len = font_unparse_xlfd (font_spec, 0, xlfd, 256);
1720 if (len < 0)
1721 error ("Invalid fontset name (perhaps too long): %s", SDATA (name));
1722 FONTSET_ASCII (fontset) = make_unibyte_string (xlfd, len);
1724 else
1726 fontset = FONTSET_FROM_ID (id);
1727 free_realized_fontsets (fontset);
1728 Fset_char_table_range (fontset, Qt, Qnil);
1731 for (; ! NILP (fontlist); fontlist = Fcdr (fontlist))
1733 Lisp_Object elt, script;
1735 elt = Fcar (fontlist);
1736 script = Fcar (elt);
1737 elt = Fcdr (elt);
1738 if (CONSP (elt) && (NILP (XCDR (elt)) || CONSP (XCDR (elt))))
1739 for (; CONSP (elt); elt = XCDR (elt))
1740 Fset_fontset_font (name, script, XCAR (elt), Qnil, Qappend);
1741 else
1742 Fset_fontset_font (name, script, elt, Qnil, Qappend);
1744 return name;
1748 /* Alist of automatically created fontsets. Each element is a cons
1749 (FONT-SPEC . FONTSET-ID). */
1750 static Lisp_Object auto_fontset_alist;
1752 /* Number of automatically created fontsets. */
1753 static int num_auto_fontsets;
1755 /* Retun a fontset synthesized from FONT-OBJECT. This is called from
1756 x_new_font when FONT-OBJECT is used for the default ASCII font of a
1757 frame, and the returned fontset is used for the default fontset of
1758 that frame. The fontset specifies a font of the same registry as
1759 FONT-OBJECT for all characters in the repertory of the registry
1760 (see Vfont_encoding_alist). If the repertory is not known, the
1761 fontset specifies the font for all Latin characters assuming that a
1762 user intends to use FONT-OBJECT for Latin characters. */
1765 fontset_from_font (font_object)
1766 Lisp_Object font_object;
1768 Lisp_Object font_name = font_get_name (font_object);
1769 Lisp_Object font_spec = Fcopy_font_spec (font_object);
1770 Lisp_Object registry = AREF (font_spec, FONT_REGISTRY_INDEX);
1771 Lisp_Object fontset_spec, alias, name, fontset;
1772 Lisp_Object val;
1774 val = assoc_no_quit (font_spec, auto_fontset_alist);
1775 if (CONSP (val))
1776 return XINT (FONTSET_ID (XCDR (val)));
1777 if (num_auto_fontsets++ == 0)
1778 alias = intern ("fontset-startup");
1779 else
1781 char temp[32];
1783 sprintf (temp, "fontset-auto%d", num_auto_fontsets - 1);
1784 alias = intern (temp);
1786 fontset_spec = Fcopy_font_spec (font_spec);
1787 ASET (fontset_spec, FONT_REGISTRY_INDEX, alias);
1788 name = Ffont_xlfd_name (fontset_spec, Qnil);
1789 if (NILP (name))
1790 abort ();
1791 fontset = make_fontset (Qnil, name, Qnil);
1792 Vfontset_alias_alist = Fcons (Fcons (name, SYMBOL_NAME (alias)),
1793 Vfontset_alias_alist);
1794 alias = Fdowncase (AREF (font_object, FONT_NAME_INDEX));
1795 Vfontset_alias_alist = Fcons (Fcons (name, alias), Vfontset_alias_alist);
1796 auto_fontset_alist = Fcons (Fcons (font_spec, fontset), auto_fontset_alist);
1797 font_spec = Ffont_spec (0, NULL);
1798 ASET (font_spec, FONT_REGISTRY_INDEX, registry);
1800 Lisp_Object target = find_font_encoding (SYMBOL_NAME (registry));
1802 if (CONSP (target))
1803 target = XCDR (target);
1804 if (! CHARSETP (target))
1805 target = Qlatin;
1806 Fset_fontset_font (name, target, font_spec, Qnil, Qnil);
1807 Fset_fontset_font (name, Qnil, font_spec, Qnil, Qnil);
1810 FONTSET_ASCII (fontset) = font_name;
1812 return XINT (FONTSET_ID (fontset));
1816 /* Update auto_fontset_alist for FONTSET. When an ASCII font of
1817 FONTSET is changed, we delete an entry of FONTSET if any from
1818 auto_fontset_alist so that FONTSET is not re-used by
1819 fontset_from_font. */
1821 static void
1822 update_auto_fontset_alist (font_object, fontset)
1823 Lisp_Object font_object, fontset;
1825 Lisp_Object prev, tail;
1827 for (prev = Qnil, tail = auto_fontset_alist; CONSP (tail);
1828 prev = tail, tail = XCDR (tail))
1829 if (EQ (fontset, XCDR (XCAR (tail))))
1831 if (NILP (prev))
1832 auto_fontset_alist = XCDR (tail);
1833 else
1834 XSETCDR (prev, XCDR (tail));
1835 break;
1840 /* Return a cons (FONT-OBJECT . GLYPH-CODE).
1841 FONT-OBJECT is the font for the character at POSITION in the current
1842 buffer. This is computed from all the text properties and overlays
1843 that apply to POSITION. POSTION may be nil, in which case,
1844 FONT-SPEC is the font for displaying the character CH with the
1845 default face.
1847 GLYPH-CODE is the glyph code in the font to use for the character.
1849 If the 2nd optional arg CH is non-nil, it is a character to check
1850 the font instead of the character at POSITION.
1852 It returns nil in the following cases:
1854 (1) The window system doesn't have a font for the character (thus
1855 it is displayed by an empty box).
1857 (2) The character code is invalid.
1859 (3) If POSITION is not nil, and the current buffer is not displayed
1860 in any window.
1862 In addition, the returned font name may not take into account of
1863 such redisplay engine hooks as what used in jit-lock-mode if
1864 POSITION is currently not visible. */
1867 DEFUN ("internal-char-font", Finternal_char_font, Sinternal_char_font, 1, 2, 0,
1868 doc: /* For internal use only. */)
1869 (position, ch)
1870 Lisp_Object position, ch;
1872 EMACS_INT pos, pos_byte, dummy;
1873 int face_id;
1874 int c;
1875 struct frame *f;
1876 struct face *face;
1877 int cs_id;
1879 if (NILP (position))
1881 CHECK_CHARACTER (ch);
1882 c = XINT (ch);
1883 f = XFRAME (selected_frame);
1884 face_id = lookup_basic_face (f, DEFAULT_FACE_ID);
1885 pos = -1;
1886 cs_id = -1;
1888 else
1890 Lisp_Object window, charset;
1891 struct window *w;
1893 CHECK_NUMBER_COERCE_MARKER (position);
1894 pos = XINT (position);
1895 if (pos < BEGV || pos >= ZV)
1896 args_out_of_range_3 (position, make_number (BEGV), make_number (ZV));
1897 pos_byte = CHAR_TO_BYTE (pos);
1898 if (NILP (ch))
1899 c = FETCH_CHAR (pos_byte);
1900 else
1902 CHECK_NATNUM (ch);
1903 c = XINT (ch);
1905 window = Fget_buffer_window (Fcurrent_buffer (), Qnil);
1906 if (NILP (window))
1907 return Qnil;
1908 w = XWINDOW (window);
1909 f = XFRAME (w->frame);
1910 face_id = face_at_buffer_position (w, pos, -1, -1, &dummy,
1911 pos + 100, 0, -1);
1912 charset = Fget_char_property (position, Qcharset, Qnil);
1913 if (CHARSETP (charset))
1914 cs_id = XINT (CHARSET_SYMBOL_ID (charset));
1915 else
1916 cs_id = -1;
1918 if (! CHAR_VALID_P (c, 0))
1919 return Qnil;
1920 face_id = FACE_FOR_CHAR (f, FACE_FROM_ID (f, face_id), c, pos, Qnil);
1921 face = FACE_FROM_ID (f, face_id);
1922 if (face->font)
1924 unsigned code = face->font->driver->encode_char (face->font, c);
1925 Lisp_Object font_object;
1926 /* Assignment to EMACS_INT stops GCC whining about limited range
1927 of data type. */
1928 EMACS_INT cod = code;
1930 if (code == FONT_INVALID_CODE)
1931 return Qnil;
1932 XSETFONT (font_object, face->font);
1933 if (cod <= MOST_POSITIVE_FIXNUM)
1934 return Fcons (font_object, make_number (code));
1935 return Fcons (font_object, Fcons (make_number (code >> 16),
1936 make_number (code & 0xFFFF)));
1938 return Qnil;
1942 DEFUN ("fontset-info", Ffontset_info, Sfontset_info, 1, 2, 0,
1943 doc: /* Return information about a fontset FONTSET on frame FRAME.
1945 FONTSET is a fontset name string, nil for the fontset of FRAME, or t
1946 for the default fontset. FRAME nil means the selected frame.
1948 The value is a char-table whose elements have this form:
1950 ((FONT OPENED-FONT ...) ...)
1952 FONT is a name of font specified for a range of characters.
1954 OPENED-FONT is a name of a font actually opened.
1956 The char-table has one extra slot. If FONTSET is not the default
1957 fontset, the value the extra slot is a char-table containing the
1958 information about the derived fonts from the default fontset. The
1959 format is the same as above. */)
1960 (fontset, frame)
1961 Lisp_Object fontset, frame;
1963 FRAME_PTR f;
1964 Lisp_Object *realized[2], fontsets[2], tables[2];
1965 Lisp_Object val, elt;
1966 int c, i, j, k;
1968 (*check_window_system_func) ();
1970 fontset = check_fontset_name (fontset, &frame);
1971 f = XFRAME (frame);
1973 /* Recode fontsets realized on FRAME from the base fontset FONTSET
1974 in the table `realized'. */
1975 realized[0] = (Lisp_Object *) alloca (sizeof (Lisp_Object)
1976 * ASIZE (Vfontset_table));
1977 for (i = j = 0; i < ASIZE (Vfontset_table); i++)
1979 elt = FONTSET_FROM_ID (i);
1980 if (!NILP (elt)
1981 && EQ (FONTSET_BASE (elt), fontset)
1982 && EQ (FONTSET_FRAME (elt), frame))
1983 realized[0][j++] = elt;
1985 realized[0][j] = Qnil;
1987 realized[1] = (Lisp_Object *) alloca (sizeof (Lisp_Object)
1988 * ASIZE (Vfontset_table));
1989 for (i = j = 0; ! NILP (realized[0][i]); i++)
1991 elt = FONTSET_DEFAULT (realized[0][i]);
1992 if (! NILP (elt))
1993 realized[1][j++] = elt;
1995 realized[1][j] = Qnil;
1997 tables[0] = Fmake_char_table (Qfontset_info, Qnil);
1998 fontsets[0] = fontset;
1999 if (!EQ (fontset, Vdefault_fontset))
2001 tables[1] = Fmake_char_table (Qnil, Qnil);
2002 XCHAR_TABLE (tables[0])->extras[0] = tables[1];
2003 fontsets[1] = Vdefault_fontset;
2006 /* Accumulate information of the fontset in TABLE. The format of
2007 each element is ((FONT-SPEC OPENED-FONT ...) ...). */
2008 for (k = 0; k <= 1; k++)
2010 for (c = 0; c <= MAX_CHAR; )
2012 int from = c, to = MAX_5_BYTE_CHAR;
2014 if (c <= MAX_5_BYTE_CHAR)
2016 val = char_table_ref_and_range (fontsets[k], c, &from, &to);
2018 else
2020 val = FONTSET_FALLBACK (fontsets[k]);
2021 to = MAX_CHAR;
2023 if (VECTORP (val))
2025 Lisp_Object alist;
2027 /* At first, set ALIST to ((FONT-SPEC) ...). */
2028 for (alist = Qnil, i = 0; i < ASIZE (val); i++)
2029 if (! NILP (AREF (val, i)))
2030 alist = Fcons (Fcons (FONT_DEF_SPEC (AREF (val, i)), Qnil),
2031 alist);
2032 alist = Fnreverse (alist);
2034 /* Then store opened font names to cdr of each elements. */
2035 for (i = 0; ! NILP (realized[k][i]); i++)
2037 if (c <= MAX_5_BYTE_CHAR)
2038 val = FONTSET_REF (realized[k][i], c);
2039 else
2040 val = FONTSET_FALLBACK (realized[k][i]);
2041 if (! CONSP (val) || ! VECTORP (XCDR (val)))
2042 continue;
2043 /* VAL: (int . [[FACE-ID FONT-DEF FONT-OBJECT int] ... ]) */
2044 val = XCDR (val);
2045 for (j = 0; j < ASIZE (val); j++)
2047 elt = AREF (val, j);
2048 if (FONT_OBJECT_P (RFONT_DEF_OBJECT (elt)))
2050 Lisp_Object font_object = RFONT_DEF_OBJECT (elt);
2051 Lisp_Object slot, name;
2053 slot = Fassq (RFONT_DEF_SPEC (elt), alist);
2054 name = AREF (font_object, FONT_NAME_INDEX);
2055 if (NILP (Fmember (name, XCDR (slot))))
2056 nconc2 (slot, Fcons (name, Qnil));
2061 /* Store ALIST in TBL for characters C..TO. */
2062 if (c <= MAX_5_BYTE_CHAR)
2063 char_table_set_range (tables[k], c, to, alist);
2064 else
2065 XCHAR_TABLE (tables[k])->defalt = alist;
2067 /* At last, change each elements to font names. */
2068 for (; CONSP (alist); alist = XCDR (alist))
2070 elt = XCAR (alist);
2071 XSETCAR (elt, Ffont_xlfd_name (XCAR (elt), Qnil));
2074 c = to + 1;
2076 if (EQ (fontset, Vdefault_fontset))
2077 break;
2080 return tables[0];
2084 DEFUN ("fontset-font", Ffontset_font, Sfontset_font, 2, 3, 0,
2085 doc: /* Return a font name pattern for character CH in fontset NAME.
2086 If NAME is t, find a pattern in the default fontset.
2087 If NAME is nil, find a pattern in the fontset of the selected frame.
2089 The value has the form (FAMILY . REGISTRY), where FAMILY is a font
2090 family name and REGISTRY is a font registry name. This is actually
2091 the first font name pattern for CH in the fontset or in the default
2092 fontset.
2094 If the 2nd optional arg ALL is non-nil, return a list of all font name
2095 patterns. */)
2096 (name, ch, all)
2097 Lisp_Object name, ch, all;
2099 int c;
2100 Lisp_Object fontset, elt, list, repertory, val;
2101 int i, j;
2102 Lisp_Object frame;
2104 frame = Qnil;
2105 fontset = check_fontset_name (name, &frame);
2107 CHECK_CHARACTER (ch);
2108 c = XINT (ch);
2109 list = Qnil;
2110 while (1)
2112 for (i = 0, elt = FONTSET_REF (fontset, c); i < 2;
2113 i++, elt = FONTSET_FALLBACK (fontset))
2114 if (VECTORP (elt))
2115 for (j = 0; j < ASIZE (elt); j++)
2117 Lisp_Object family, registry;
2119 val = AREF (elt, j);
2120 if (NILP (val))
2121 return Qnil;
2122 repertory = AREF (val, 1);
2123 if (INTEGERP (repertory))
2125 struct charset *charset = CHARSET_FROM_ID (XINT (repertory));
2127 if (! CHAR_CHARSET_P (c, charset))
2128 continue;
2130 else if (CHAR_TABLE_P (repertory))
2132 if (NILP (CHAR_TABLE_REF (repertory, c)))
2133 continue;
2135 val = AREF (val, 0);
2136 /* VAL is a FONT-SPEC */
2137 family = AREF (val, FONT_FAMILY_INDEX);
2138 if (! NILP (family))
2139 family = SYMBOL_NAME (family);
2140 registry = AREF (val, FONT_REGISTRY_INDEX);
2141 if (! NILP (registry))
2142 registry = SYMBOL_NAME (registry);
2143 val = Fcons (family, registry);
2144 if (NILP (all))
2145 return val;
2146 list = Fcons (val, list);
2148 if (EQ (fontset, Vdefault_fontset))
2149 break;
2150 fontset = Vdefault_fontset;
2152 return (Fnreverse (list));
2155 DEFUN ("fontset-list", Ffontset_list, Sfontset_list, 0, 0, 0,
2156 doc: /* Return a list of all defined fontset names. */)
2159 Lisp_Object fontset, list;
2160 int i;
2162 list = Qnil;
2163 for (i = 0; i < ASIZE (Vfontset_table); i++)
2165 fontset = FONTSET_FROM_ID (i);
2166 if (!NILP (fontset)
2167 && BASE_FONTSET_P (fontset))
2168 list = Fcons (FONTSET_NAME (fontset), list);
2171 return list;
2175 #ifdef FONTSET_DEBUG
2177 Lisp_Object
2178 dump_fontset (fontset)
2179 Lisp_Object fontset;
2181 Lisp_Object vec;
2183 vec = Fmake_vector (make_number (3), Qnil);
2184 ASET (vec, 0, FONTSET_ID (fontset));
2186 if (BASE_FONTSET_P (fontset))
2188 ASET (vec, 1, FONTSET_NAME (fontset));
2190 else
2192 Lisp_Object frame;
2194 frame = FONTSET_FRAME (fontset);
2195 if (FRAMEP (frame))
2197 FRAME_PTR f = XFRAME (frame);
2199 if (FRAME_LIVE_P (f))
2200 ASET (vec, 1,
2201 Fcons (FONTSET_NAME (FONTSET_BASE (fontset)), f->name));
2202 else
2203 ASET (vec, 1,
2204 Fcons (FONTSET_NAME (FONTSET_BASE (fontset)), Qnil));
2206 if (!NILP (FONTSET_DEFAULT (fontset)))
2207 ASET (vec, 2, FONTSET_ID (FONTSET_DEFAULT (fontset)));
2209 return vec;
2212 DEFUN ("fontset-list-all", Ffontset_list_all, Sfontset_list_all, 0, 0, 0,
2213 doc: /* Return a brief summary of all fontsets for debug use. */)
2216 Lisp_Object val;
2217 int i;
2219 for (i = 0, val = Qnil; i < ASIZE (Vfontset_table); i++)
2220 if (! NILP (AREF (Vfontset_table, i)))
2221 val = Fcons (dump_fontset (AREF (Vfontset_table, i)), val);
2222 return (Fnreverse (val));
2224 #endif /* FONTSET_DEBUG */
2226 void
2227 syms_of_fontset ()
2229 DEFSYM (Qfontset, "fontset");
2230 Fput (Qfontset, Qchar_table_extra_slots, make_number (9));
2231 DEFSYM (Qfontset_info, "fontset-info");
2232 Fput (Qfontset_info, Qchar_table_extra_slots, make_number (1));
2234 DEFSYM (Qprepend, "prepend");
2235 DEFSYM (Qappend, "append");
2236 DEFSYM (Qlatin, "latin");
2238 Vcached_fontset_data = Qnil;
2239 staticpro (&Vcached_fontset_data);
2241 Vfontset_table = Fmake_vector (make_number (32), Qnil);
2242 staticpro (&Vfontset_table);
2244 Vdefault_fontset = Fmake_char_table (Qfontset, Qnil);
2245 staticpro (&Vdefault_fontset);
2246 FONTSET_ID (Vdefault_fontset) = make_number (0);
2247 FONTSET_NAME (Vdefault_fontset)
2248 = make_pure_c_string ("-*-*-*-*-*-*-*-*-*-*-*-*-fontset-default");
2249 ASET (Vfontset_table, 0, Vdefault_fontset);
2250 next_fontset_id = 1;
2252 auto_fontset_alist = Qnil;
2253 staticpro (&auto_fontset_alist);
2255 DEFVAR_LISP ("font-encoding-charset-alist", &Vfont_encoding_charset_alist,
2256 doc: /*
2257 Alist of charsets vs the charsets to determine the preferred font encoding.
2258 Each element looks like (CHARSET . ENCODING-CHARSET),
2259 where ENCODING-CHARSET is a charset registered in the variable
2260 `font-encoding-alist' as ENCODING.
2262 When a text has a property `charset' and the value is CHARSET, a font
2263 whose encoding corresponds to ENCODING-CHARSET is preferred. */);
2264 Vfont_encoding_charset_alist = Qnil;
2266 DEFVAR_LISP ("use-default-ascent", &Vuse_default_ascent,
2267 doc: /*
2268 Char table of characters whose ascent values should be ignored.
2269 If an entry for a character is non-nil, the ascent value of the glyph
2270 is assumed to be specified by _MULE_DEFAULT_ASCENT property of a font.
2272 This affects how a composite character which contains
2273 such a character is displayed on screen. */);
2274 Vuse_default_ascent = Qnil;
2276 DEFVAR_LISP ("ignore-relative-composition", &Vignore_relative_composition,
2277 doc: /*
2278 Char table of characters which are not composed relatively.
2279 If an entry for a character is non-nil, a composition sequence
2280 which contains that character is displayed so that
2281 the glyph of that character is put without considering
2282 an ascent and descent value of a previous character. */);
2283 Vignore_relative_composition = Qnil;
2285 DEFVAR_LISP ("alternate-fontname-alist", &Valternate_fontname_alist,
2286 doc: /* Alist of fontname vs list of the alternate fontnames.
2287 When a specified font name is not found, the corresponding
2288 alternate fontnames (if any) are tried instead. */);
2289 Valternate_fontname_alist = Qnil;
2291 DEFVAR_LISP ("fontset-alias-alist", &Vfontset_alias_alist,
2292 doc: /* Alist of fontset names vs the aliases. */);
2293 Vfontset_alias_alist = Fcons (Fcons (FONTSET_NAME (Vdefault_fontset),
2294 make_pure_c_string ("fontset-default")),
2295 Qnil);
2297 DEFVAR_LISP ("vertical-centering-font-regexp",
2298 &Vvertical_centering_font_regexp,
2299 doc: /* *Regexp matching font names that require vertical centering on display.
2300 When a character is displayed with such fonts, the character is displayed
2301 at the vertical center of lines. */);
2302 Vvertical_centering_font_regexp = Qnil;
2304 DEFVAR_LISP ("otf-script-alist", &Votf_script_alist,
2305 doc: /* Alist of OpenType script tags vs the corresponding script names. */);
2306 Votf_script_alist = Qnil;
2308 defsubr (&Squery_fontset);
2309 defsubr (&Snew_fontset);
2310 defsubr (&Sset_fontset_font);
2311 defsubr (&Sinternal_char_font);
2312 defsubr (&Sfontset_info);
2313 defsubr (&Sfontset_font);
2314 defsubr (&Sfontset_list);
2315 #ifdef FONTSET_DEBUG
2316 defsubr (&Sfontset_list_all);
2317 #endif
2320 /* arch-tag: ea861585-2f5f-4e5b-9849-d04a9c3a3537
2321 (do not change this comment) */