* lisp/ielm.el (ielm-menu): New menu.
[emacs.git] / src / fontset.c
blob2f6313c421469f87e4e7f3c800d12bfb56f63fae
1 /* Fontset handler.
3 Copyright (C) 2001-2013 Free Software Foundation, Inc.
4 Copyright (C) 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004,
5 2005, 2006, 2007, 2008, 2009, 2010, 2011
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 #include <config.h>
28 #include <stdio.h>
30 #include "lisp.h"
31 #include "blockinput.h"
32 #include "character.h"
33 #include "buffer.h"
34 #include "charset.h"
35 #include "ccl.h"
36 #include "keyboard.h"
37 #include "frame.h"
38 #include "dispextern.h"
39 #include "intervals.h"
40 #include "fontset.h"
41 #include "window.h"
42 #ifdef HAVE_X_WINDOWS
43 #include "xterm.h"
44 #endif
45 #ifdef HAVE_NTGUI
46 #include "w32term.h"
47 #endif
48 #ifdef HAVE_NS
49 #include "nsterm.h"
50 #endif
51 #include "termhooks.h"
53 #include "font.h"
55 /* FONTSET
57 A fontset is a collection of font related information to give
58 similar appearance (style, etc) of characters. A fontset has two
59 roles. One is to use for the frame parameter `font' as if it is an
60 ASCII font. In that case, Emacs uses the font specified for
61 `ascii' script for the frame's default font.
63 Another role, the more important one, is to provide information
64 about which font to use for each non-ASCII character.
66 There are two kinds of fontsets; base and realized. A base fontset
67 is created by `new-fontset' from Emacs Lisp explicitly. A realized
68 fontset is created implicitly when a face is realized for ASCII
69 characters. A face is also realized for non-ASCII characters based
70 on an ASCII face. All of non-ASCII faces based on the same ASCII
71 face share the same realized fontset.
73 A fontset object is implemented by a char-table whose default value
74 and parent are always nil.
76 An element of a base fontset is a vector of FONT-DEFs which itself
77 is a vector [ FONT-SPEC ENCODING REPERTORY ].
79 An element of a realized fontset is nil, t, 0, or a vector of this
80 form:
82 [ CHARSET-ORDERED-LIST-TICK PREFERRED-RFONT-DEF
83 RFONT-DEF0 RFONT-DEF1 ... ]
85 RFONT-DEFn (i.e. Realized FONT-DEF) has this form:
87 [ FACE-ID FONT-DEF FONT-OBJECT SORTING-SCORE ]
89 RFONT-DEFn are automatically reordered by the current charset
90 priority list.
92 The value nil means that we have not yet generated the above vector
93 from the base of the fontset.
95 The value t means that no font is available for the corresponding
96 range of characters.
98 The value 0 means that no font is available for the corresponding
99 range of characters in this fontset, but may be available in the
100 default fontset.
103 A fontset has 9 extra slots.
105 The 1st slot: the ID number of the fontset
107 The 2nd slot:
108 base: the name of the fontset
109 realized: nil
111 The 3rd slot:
112 base: nil
113 realized: the base fontset
115 The 4th slot:
116 base: nil
117 realized: the frame that the fontset belongs to
119 The 5th slot:
120 base: the font name for ASCII characters
121 realized: nil
123 The 6th slot:
124 base: nil
125 realized: the ID number of a face to use for characters that
126 has no font in a realized fontset.
128 The 7th slot:
129 base: nil
130 realized: Alist of font index vs the corresponding repertory
131 char-table.
133 The 8th slot:
134 base: nil
135 realized: If the base is not the default fontset, a fontset
136 realized from the default fontset, else nil.
138 The 9th slot:
139 base: Same as element value (but for fallback fonts).
140 realized: Likewise.
142 All fontsets are recorded in the vector Vfontset_table.
145 DEFAULT FONTSET
147 There's a special base fontset named `default fontset' which
148 defines the default font specifications. When a base fontset
149 doesn't specify a font for a specific character, the corresponding
150 value in the default fontset is used.
152 The parent of a realized fontset created for such a face that has
153 no fontset is the default fontset.
156 These structures are hidden from the other codes than this file.
157 The other codes handle fontsets only by their ID numbers. They
158 usually use the variable name `fontset' for IDs. But, in this
159 file, we always use variable name `id' for IDs, and name `fontset'
160 for an actual fontset object, i.e., char-table.
164 /********** VARIABLES and FUNCTION PROTOTYPES **********/
166 static Lisp_Object Qfontset;
167 static Lisp_Object Qfontset_info;
168 static Lisp_Object Qprepend, Qappend;
169 Lisp_Object Qlatin;
171 /* Vector containing all fontsets. */
172 static Lisp_Object Vfontset_table;
174 /* Next possibly free fontset ID. Usually this keeps the minimum
175 fontset ID not yet used. */
176 static int next_fontset_id;
178 /* The default fontset. This gives default FAMILY and REGISTRY of
179 font for each character. */
180 static Lisp_Object Vdefault_fontset;
182 /* Prototype declarations for static functions. */
183 static Lisp_Object make_fontset (Lisp_Object, Lisp_Object, Lisp_Object);
185 /* Return true if ID is a valid fontset id.
186 Optimized away if ENABLE_CHECKING is not defined. */
188 static bool
189 fontset_id_valid_p (int id)
191 return (id >= 0 && id < ASIZE (Vfontset_table) - 1);
196 /********** MACROS AND FUNCTIONS TO HANDLE FONTSET **********/
198 /* Return the fontset with ID. No check of ID's validness. */
199 #define FONTSET_FROM_ID(id) AREF (Vfontset_table, id)
201 /* Access special values of FONTSET. */
203 #define FONTSET_ID(fontset) XCHAR_TABLE (fontset)->extras[0]
204 static void
205 set_fontset_id (Lisp_Object fontset, Lisp_Object id)
207 set_char_table_extras (fontset, 0, id);
210 /* Access special values of (base) FONTSET. */
212 #define FONTSET_NAME(fontset) XCHAR_TABLE (fontset)->extras[1]
213 static void
214 set_fontset_name (Lisp_Object fontset, Lisp_Object name)
216 set_char_table_extras (fontset, 1, name);
219 #define FONTSET_ASCII(fontset) XCHAR_TABLE (fontset)->extras[4]
220 static void
221 set_fontset_ascii (Lisp_Object fontset, Lisp_Object ascii)
223 set_char_table_extras (fontset, 4, ascii);
226 /* Access special values of (realized) FONTSET. */
228 #define FONTSET_BASE(fontset) XCHAR_TABLE (fontset)->extras[2]
229 static void
230 set_fontset_base (Lisp_Object fontset, Lisp_Object base)
232 set_char_table_extras (fontset, 2, base);
235 #define FONTSET_FRAME(fontset) XCHAR_TABLE (fontset)->extras[3]
236 static void
237 set_fontset_frame (Lisp_Object fontset, Lisp_Object frame)
239 set_char_table_extras (fontset, 3, frame);
242 #define FONTSET_NOFONT_FACE(fontset) XCHAR_TABLE (fontset)->extras[5]
243 static void
244 set_fontset_nofont_face (Lisp_Object fontset, Lisp_Object face)
246 set_char_table_extras (fontset, 5, face);
249 #define FONTSET_DEFAULT(fontset) XCHAR_TABLE (fontset)->extras[7]
250 static void
251 set_fontset_default (Lisp_Object fontset, Lisp_Object def)
253 set_char_table_extras (fontset, 7, def);
256 /* For both base and realized fontset. */
258 #define FONTSET_FALLBACK(fontset) XCHAR_TABLE (fontset)->extras[8]
259 static void
260 set_fontset_fallback (Lisp_Object fontset, Lisp_Object fallback)
262 set_char_table_extras (fontset, 8, fallback);
265 #define BASE_FONTSET_P(fontset) (NILP (FONTSET_BASE (fontset)))
267 /* Macros for FONT-DEF and RFONT-DEF of fontset. */
268 #define FONT_DEF_NEW(font_def, font_spec, encoding, repertory) \
269 do { \
270 (font_def) = make_uninit_vector (3); \
271 ASET ((font_def), 0, font_spec); \
272 ASET ((font_def), 1, encoding); \
273 ASET ((font_def), 2, repertory); \
274 } while (0)
276 #define FONT_DEF_SPEC(font_def) AREF (font_def, 0)
277 #define FONT_DEF_ENCODING(font_def) AREF (font_def, 1)
278 #define FONT_DEF_REPERTORY(font_def) AREF (font_def, 2)
280 #define RFONT_DEF_FACE(rfont_def) AREF (rfont_def, 0)
281 #define RFONT_DEF_SET_FACE(rfont_def, face_id) \
282 ASET ((rfont_def), 0, make_number (face_id))
283 #define RFONT_DEF_FONT_DEF(rfont_def) AREF (rfont_def, 1)
284 #define RFONT_DEF_SPEC(rfont_def) FONT_DEF_SPEC (AREF (rfont_def, 1))
285 #define RFONT_DEF_OBJECT(rfont_def) AREF (rfont_def, 2)
286 #define RFONT_DEF_SET_OBJECT(rfont_def, object) \
287 ASET ((rfont_def), 2, (object))
288 /* Score of RFONT_DEF is an integer value; the lowest 8 bits represent
289 the order of listing by font backends, the higher bits represents
290 the order given by charset priority list. The smaller value is
291 preferable. */
292 #define RFONT_DEF_SCORE(rfont_def) XINT (AREF (rfont_def, 3))
293 #define RFONT_DEF_SET_SCORE(rfont_def, score) \
294 ASET ((rfont_def), 3, make_number (score))
295 #define RFONT_DEF_NEW(rfont_def, font_def) \
296 do { \
297 (rfont_def) = Fmake_vector (make_number (4), Qnil); \
298 ASET ((rfont_def), 1, (font_def)); \
299 RFONT_DEF_SET_SCORE ((rfont_def), 0); \
300 } while (0)
303 /* Return the element of FONTSET for the character C. If FONTSET is a
304 base fontset other then the default fontset and FONTSET doesn't
305 contain information for C, return the information in the default
306 fontset. */
308 #define FONTSET_REF(fontset, c) \
309 (EQ (fontset, Vdefault_fontset) \
310 ? CHAR_TABLE_REF (fontset, c) \
311 : fontset_ref ((fontset), (c)))
313 static Lisp_Object
314 fontset_ref (Lisp_Object fontset, int c)
316 Lisp_Object elt;
318 elt = CHAR_TABLE_REF (fontset, c);
319 if (NILP (elt) && ! EQ (fontset, Vdefault_fontset)
320 /* Don't check Vdefault_fontset for a realized fontset. */
321 && NILP (FONTSET_BASE (fontset)))
322 elt = CHAR_TABLE_REF (Vdefault_fontset, c);
323 return elt;
326 /* Set elements of FONTSET for characters in RANGE to the value ELT.
327 RANGE is a cons (FROM . TO), where FROM and TO are character codes
328 specifying a range. */
330 #define FONTSET_SET(fontset, range, elt) \
331 Fset_char_table_range ((fontset), (range), (elt))
334 /* Modify the elements of FONTSET for characters in RANGE by replacing
335 with ELT or adding ELT. RANGE is a cons (FROM . TO), where FROM
336 and TO are character codes specifying a range. If ADD is nil,
337 replace with ELT, if ADD is `prepend', prepend ELT, otherwise,
338 append ELT. */
340 #define FONTSET_ADD(fontset, range, elt, add) \
341 (NILP (add) \
342 ? (NILP (range) \
343 ? (set_fontset_fallback \
344 (fontset, Fmake_vector (make_number (1), (elt)))) \
345 : ((void) \
346 Fset_char_table_range (fontset, range, \
347 Fmake_vector (make_number (1), elt)))) \
348 : fontset_add ((fontset), (range), (elt), (add)))
350 static void
351 fontset_add (Lisp_Object fontset, Lisp_Object range, Lisp_Object elt, Lisp_Object add)
353 Lisp_Object args[2];
354 int idx = (EQ (add, Qappend) ? 0 : 1);
356 args[1 - idx] = Fmake_vector (make_number (1), elt);
358 if (CONSP (range))
360 int from = XINT (XCAR (range));
361 int to = XINT (XCDR (range));
362 int from1, to1;
364 do {
365 from1 = from, to1 = to;
366 args[idx] = char_table_ref_and_range (fontset, from, &from1, &to1);
367 char_table_set_range (fontset, from, to1,
368 NILP (args[idx]) ? args[1 - idx]
369 : Fvconcat (2, args));
370 from = to1 + 1;
371 } while (from < to);
373 else
375 args[idx] = FONTSET_FALLBACK (fontset);
376 set_fontset_fallback
377 (fontset, NILP (args[idx]) ? args[1 - idx] : Fvconcat (2, args));
381 static int
382 fontset_compare_rfontdef (const void *val1, const void *val2)
384 return (RFONT_DEF_SCORE (*(Lisp_Object *) val1)
385 - RFONT_DEF_SCORE (*(Lisp_Object *) val2));
388 /* Update FONT-GROUP which has this form:
389 [ CHARSET-ORDERED-LIST-TICK PREFERRED-RFONT-DEF
390 RFONT-DEF0 RFONT-DEF1 ... ]
391 Reorder RFONT-DEFs according to the current language, and update
392 CHARSET-ORDERED-LIST-TICK.
394 If PREFERRED_FAMILY is not nil, that family has the higher priority
395 if the encoding charsets or languages in font-specs are the same. */
397 static void
398 reorder_font_vector (Lisp_Object font_group, struct font *font)
400 Lisp_Object vec, font_object;
401 int size;
402 int i;
403 bool score_changed = 0;
405 if (font)
406 XSETFONT (font_object, font);
407 else
408 font_object = Qnil;
410 vec = XCDR (font_group);
411 size = ASIZE (vec);
412 /* Exclude the tailing nil element from the reordering. */
413 if (NILP (AREF (vec, size - 1)))
414 size--;
416 for (i = 0; i < size; i++)
418 Lisp_Object rfont_def = AREF (vec, i);
419 Lisp_Object font_def = RFONT_DEF_FONT_DEF (rfont_def);
420 Lisp_Object font_spec = FONT_DEF_SPEC (font_def);
421 int score = RFONT_DEF_SCORE (rfont_def) & 0xFF;
422 Lisp_Object otf_spec = Ffont_get (font_spec, QCotf);
424 if (! NILP (otf_spec))
425 /* A font-spec with :otf is preferable regardless of encoding
426 and language.. */
428 else if (! font_match_p (font_spec, font_object))
430 Lisp_Object encoding = FONT_DEF_ENCODING (font_def);
432 if (! NILP (encoding))
434 Lisp_Object tail;
436 for (tail = Vcharset_ordered_list;
437 ! EQ (tail, Vcharset_non_preferred_head) && CONSP (tail);
438 tail = XCDR (tail))
439 if (EQ (encoding, XCAR (tail)))
440 break;
441 else if (score <= min (INT_MAX, MOST_POSITIVE_FIXNUM) - 0x100)
442 score += 0x100;
444 else
446 Lisp_Object lang = Ffont_get (font_spec, QClang);
448 if (! NILP (lang)
449 && ! EQ (lang, Vcurrent_iso639_language)
450 && (! CONSP (Vcurrent_iso639_language)
451 || NILP (Fmemq (lang, Vcurrent_iso639_language))))
452 score |= 0x100;
455 if (RFONT_DEF_SCORE (rfont_def) != score)
457 RFONT_DEF_SET_SCORE (rfont_def, score);
458 score_changed = 1;
462 if (score_changed)
463 qsort (XVECTOR (vec)->contents, size, word_size,
464 fontset_compare_rfontdef);
465 XSETCAR (font_group, make_number (charset_ordered_list_tick));
468 /* Return a font-group (actually a cons (-1 . FONT-GROUP-VECTOR)) for
469 character C in FONTSET. If C is -1, return a fallback font-group.
470 If C is not -1, the value may be Qt (FONTSET doesn't have a font
471 for C even in the fallback group), or 0 (a font for C may be found
472 only in the fallback group). */
474 static Lisp_Object
475 fontset_get_font_group (Lisp_Object fontset, int c)
477 Lisp_Object font_group;
478 Lisp_Object base_fontset;
479 int from = 0, to = MAX_CHAR, i;
481 eassert (! BASE_FONTSET_P (fontset));
482 if (c >= 0)
483 font_group = CHAR_TABLE_REF (fontset, c);
484 else
485 font_group = FONTSET_FALLBACK (fontset);
486 if (! NILP (font_group))
487 return font_group;
488 base_fontset = FONTSET_BASE (fontset);
489 if (NILP (base_fontset))
490 font_group = Qnil;
491 else if (c >= 0)
492 font_group = char_table_ref_and_range (base_fontset, c, &from, &to);
493 else
494 font_group = FONTSET_FALLBACK (base_fontset);
495 if (NILP (font_group))
497 font_group = make_number (0);
498 if (c >= 0)
499 char_table_set_range (fontset, from, to, font_group);
500 return font_group;
502 if (!VECTORP (font_group))
503 return font_group;
504 font_group = Fcopy_sequence (font_group);
505 for (i = 0; i < ASIZE (font_group); i++)
506 if (! NILP (AREF (font_group, i)))
508 Lisp_Object rfont_def;
510 RFONT_DEF_NEW (rfont_def, AREF (font_group, i));
511 /* Remember the original order. */
512 RFONT_DEF_SET_SCORE (rfont_def, i);
513 ASET (font_group, i, rfont_def);
515 font_group = Fcons (make_number (-1), font_group);
516 if (c >= 0)
517 char_table_set_range (fontset, from, to, font_group);
518 else
519 set_fontset_fallback (fontset, font_group);
520 return font_group;
523 /* Return RFONT-DEF (vector) in the realized fontset FONTSET for the
524 character C. If no font is found, return Qnil if there's a
525 possibility that the default fontset or the fallback font groups
526 have a proper font, and return Qt if not.
528 If a font is found but is not yet opened, open it (if FACE is not
529 NULL) or return Qnil (if FACE is NULL).
531 ID is a charset-id that must be preferred, or -1 meaning no
532 preference.
534 If FALLBACK, search only fallback fonts. */
536 static Lisp_Object
537 fontset_find_font (Lisp_Object fontset, int c, struct face *face, int id,
538 bool fallback)
540 Lisp_Object vec, font_group;
541 int i, charset_matched = 0, found_index;
542 FRAME_PTR f = (FRAMEP (FONTSET_FRAME (fontset))
543 ? XFRAME (FONTSET_FRAME (fontset)) : XFRAME (selected_frame));
544 Lisp_Object rfont_def;
546 font_group = fontset_get_font_group (fontset, fallback ? -1 : c);
547 if (! CONSP (font_group))
548 return font_group;
549 vec = XCDR (font_group);
550 if (ASIZE (vec) == 0)
551 return Qnil;
553 if (ASIZE (vec) > 1)
555 if (XINT (XCAR (font_group)) != charset_ordered_list_tick)
556 /* We have just created the font-group,
557 or the charset priorities were changed. */
558 reorder_font_vector (font_group, face->ascii_face->font);
559 if (id >= 0)
560 /* Find a spec matching with the charset ID to try at
561 first. */
562 for (i = 0; i < ASIZE (vec); i++)
564 Lisp_Object repertory;
566 rfont_def = AREF (vec, i);
567 if (NILP (rfont_def))
568 break;
569 repertory = FONT_DEF_REPERTORY (RFONT_DEF_FONT_DEF (rfont_def));
571 if (XINT (repertory) == id)
573 charset_matched = i;
574 break;
579 /* Find the first available font in the vector of RFONT-DEF. */
580 for (i = 0; i < ASIZE (vec); i++)
582 Lisp_Object font_def;
583 Lisp_Object font_entity, font_object;
585 found_index = i;
586 if (i == 0)
588 if (charset_matched > 0)
590 /* Try the element matching with the charset ID at first. */
591 found_index = charset_matched;
592 /* Make this negative so that we don't come here in the
593 next loop. */
594 charset_matched = - charset_matched;
595 /* We must try the first element in the next loop. */
596 i--;
599 else if (i == - charset_matched)
601 /* We have already tried this element and the followings
602 that have the same font specifications in the first
603 iteration. So, skip them all. */
604 rfont_def = AREF (vec, i);
605 font_def = RFONT_DEF_FONT_DEF (rfont_def);
606 for (; i + 1 < ASIZE (vec); i++)
608 rfont_def = AREF (vec, i + 1);
609 if (NILP (rfont_def))
610 break;
611 if (! EQ (RFONT_DEF_FONT_DEF (rfont_def), font_def))
612 break;
614 continue;
617 rfont_def = AREF (vec, found_index);
618 if (NILP (rfont_def))
620 if (i < 0)
621 continue;
622 /* This is a sign of not to try the other fonts. */
623 return Qt;
625 if (INTEGERP (RFONT_DEF_FACE (rfont_def))
626 && XINT (RFONT_DEF_FACE (rfont_def)) < 0)
627 /* We couldn't open this font last time. */
628 continue;
630 font_object = RFONT_DEF_OBJECT (rfont_def);
631 if (NILP (font_object))
633 font_def = RFONT_DEF_FONT_DEF (rfont_def);
635 if (! face)
636 /* We have not yet opened the font. */
637 return Qnil;
638 /* Find a font best-matching with the spec without checking
639 the support of the character C. That checking is costly,
640 and even without the checking, the found font supports C
641 in high possibility. */
642 font_entity = font_find_for_lface (f, face->lface,
643 FONT_DEF_SPEC (font_def), -1);
644 if (NILP (font_entity))
646 /* Record that no font matches the spec. */
647 RFONT_DEF_SET_FACE (rfont_def, -1);
648 continue;
650 font_object = font_open_for_lface (f, font_entity, face->lface,
651 FONT_DEF_SPEC (font_def));
652 if (NILP (font_object))
654 /* Something strange happened, perhaps because of a
655 Font-backend problem. Too avoid crashing, record
656 that this spec is unusable. It may be better to find
657 another font of the same spec, but currently we don't
658 have such an API. */
659 RFONT_DEF_SET_FACE (rfont_def, -1);
660 continue;
662 RFONT_DEF_SET_OBJECT (rfont_def, font_object);
665 if (font_has_char (f, font_object, c))
666 goto found;
668 /* Find a font already opened, matching with the current spec,
669 and supporting C. */
670 font_def = RFONT_DEF_FONT_DEF (rfont_def);
671 for (; found_index + 1 < ASIZE (vec); found_index++)
673 rfont_def = AREF (vec, found_index + 1);
674 if (NILP (rfont_def))
675 break;
676 if (! EQ (RFONT_DEF_FONT_DEF (rfont_def), font_def))
677 break;
678 font_object = RFONT_DEF_OBJECT (rfont_def);
679 if (! NILP (font_object) && font_has_char (f, font_object, c))
681 found_index++;
682 goto found;
686 /* Find a font-entity with the current spec and supporting C. */
687 font_entity = font_find_for_lface (f, face->lface,
688 FONT_DEF_SPEC (font_def), c);
689 if (! NILP (font_entity))
691 /* We found a font. Open it and insert a new element for
692 that font in VEC. */
693 Lisp_Object new_vec;
694 int j;
696 font_object = font_open_for_lface (f, font_entity, face->lface,
697 Qnil);
698 if (NILP (font_object))
699 continue;
700 RFONT_DEF_NEW (rfont_def, font_def);
701 RFONT_DEF_SET_OBJECT (rfont_def, font_object);
702 RFONT_DEF_SET_SCORE (rfont_def, RFONT_DEF_SCORE (rfont_def));
703 new_vec = Fmake_vector (make_number (ASIZE (vec) + 1), Qnil);
704 found_index++;
705 for (j = 0; j < found_index; j++)
706 ASET (new_vec, j, AREF (vec, j));
707 ASET (new_vec, j, rfont_def);
708 for (j++; j < ASIZE (new_vec); j++)
709 ASET (new_vec, j, AREF (vec, j - 1));
710 XSETCDR (font_group, new_vec);
711 vec = new_vec;
712 goto found;
714 if (i >= 0)
715 i = found_index;
718 FONTSET_SET (fontset, make_number (c), make_number (0));
719 return Qnil;
721 found:
722 if (fallback && found_index > 0)
724 /* The order of fonts in the fallback font-group is not that
725 important, and it is better to move the found font to the
726 first of the group so that the next try will find it
727 quickly. */
728 for (i = found_index; i > 0; i--)
729 ASET (vec, i, AREF (vec, i - 1));
730 ASET (vec, 0, rfont_def);
732 return rfont_def;
736 static Lisp_Object
737 fontset_font (Lisp_Object fontset, int c, struct face *face, int id)
739 Lisp_Object rfont_def, default_rfont_def IF_LINT (= Qnil);
740 Lisp_Object base_fontset;
742 /* Try a font-group of FONTSET. */
743 FONT_DEFERRED_LOG ("current fontset: font for", make_number (c), Qnil);
744 rfont_def = fontset_find_font (fontset, c, face, id, 0);
745 if (VECTORP (rfont_def))
746 return rfont_def;
747 if (NILP (rfont_def))
748 FONTSET_SET (fontset, make_number (c), make_number (0));
750 /* Try a font-group of the default fontset. */
751 base_fontset = FONTSET_BASE (fontset);
752 if (! EQ (base_fontset, Vdefault_fontset))
754 if (NILP (FONTSET_DEFAULT (fontset)))
755 set_fontset_default
756 (fontset,
757 make_fontset (FONTSET_FRAME (fontset), Qnil, Vdefault_fontset));
758 FONT_DEFERRED_LOG ("default fontset: font for", make_number (c), Qnil);
759 default_rfont_def
760 = fontset_find_font (FONTSET_DEFAULT (fontset), c, face, id, 0);
761 if (VECTORP (default_rfont_def))
762 return default_rfont_def;
763 if (NILP (default_rfont_def))
764 FONTSET_SET (FONTSET_DEFAULT (fontset), make_number (c),
765 make_number (0));
768 /* Try a fallback font-group of FONTSET. */
769 if (! EQ (rfont_def, Qt))
771 FONT_DEFERRED_LOG ("current fallback: font for", make_number (c), Qnil);
772 rfont_def = fontset_find_font (fontset, c, face, id, 1);
773 if (VECTORP (rfont_def))
774 return rfont_def;
775 /* Remember that FONTSET has no font for C. */
776 FONTSET_SET (fontset, make_number (c), Qt);
779 /* Try a fallback font-group of the default fontset. */
780 if (! EQ (base_fontset, Vdefault_fontset)
781 && ! EQ (default_rfont_def, Qt))
783 FONT_DEFERRED_LOG ("default fallback: font for", make_number (c), Qnil);
784 rfont_def = fontset_find_font (FONTSET_DEFAULT (fontset), c, face, id, 1);
785 if (VECTORP (rfont_def))
786 return rfont_def;
787 /* Remember that the default fontset has no font for C. */
788 FONTSET_SET (FONTSET_DEFAULT (fontset), make_number (c), Qt);
791 return Qnil;
794 /* Return a newly created fontset with NAME. If BASE is nil, make a
795 base fontset. Otherwise make a realized fontset whose base is
796 BASE. */
798 static Lisp_Object
799 make_fontset (Lisp_Object frame, Lisp_Object name, Lisp_Object base)
801 Lisp_Object fontset;
802 int size = ASIZE (Vfontset_table);
803 int id = next_fontset_id;
805 /* Find a free slot in Vfontset_table. Usually, next_fontset_id is
806 the next available fontset ID. So it is expected that this loop
807 terminates quickly. In addition, as the last element of
808 Vfontset_table is always nil, we don't have to check the range of
809 id. */
810 while (!NILP (AREF (Vfontset_table, id))) id++;
812 if (id + 1 == size)
813 Vfontset_table = larger_vector (Vfontset_table, 1, -1);
815 fontset = Fmake_char_table (Qfontset, Qnil);
817 set_fontset_id (fontset, make_number (id));
818 if (NILP (base))
819 set_fontset_name (fontset, name);
820 else
822 set_fontset_name (fontset, Qnil);
823 set_fontset_frame (fontset, frame);
824 set_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 (int id)
840 Lisp_Object fontset;
842 fontset = FONTSET_FROM_ID (id);
843 return FONTSET_NAME (fontset);
847 /* Return the ASCII font name of the fontset who has ID. */
849 Lisp_Object
850 fontset_ascii (int id)
852 Lisp_Object fontset, elt;
854 fontset= FONTSET_FROM_ID (id);
855 elt = FONTSET_ASCII (fontset);
856 if (CONSP (elt))
857 elt = XCAR (elt);
858 return elt;
861 static void
862 free_realized_fontset (FRAME_PTR f, Lisp_Object fontset)
864 #if 0
865 Lisp_Object tail;
867 if (0)
868 for (tail = FONTSET_OBJLIST (fontset); CONSP (tail); tail = XCDR (tail))
870 eassert (FONT_OBJECT_P (XCAR (tail)));
871 font_close_object (f, XCAR (tail));
873 #endif
876 /* Free fontset of FACE defined on frame F. Called from
877 free_realized_face. */
879 void
880 free_face_fontset (FRAME_PTR f, struct face *face)
882 Lisp_Object fontset;
884 fontset = FONTSET_FROM_ID (face->fontset);
885 if (NILP (fontset))
886 return;
887 eassert (! BASE_FONTSET_P (fontset));
888 eassert (f == XFRAME (FONTSET_FRAME (fontset)));
889 free_realized_fontset (f, fontset);
890 ASET (Vfontset_table, face->fontset, Qnil);
891 if (face->fontset < next_fontset_id)
892 next_fontset_id = face->fontset;
893 if (! NILP (FONTSET_DEFAULT (fontset)))
895 int id = XINT (FONTSET_ID (FONTSET_DEFAULT (fontset)));
897 fontset = AREF (Vfontset_table, id);
898 eassert (!NILP (fontset) && ! BASE_FONTSET_P (fontset));
899 eassert (f == XFRAME (FONTSET_FRAME (fontset)));
900 free_realized_fontset (f, fontset);
901 ASET (Vfontset_table, id, Qnil);
902 if (id < next_fontset_id)
903 next_fontset_id = face->fontset;
905 face->fontset = -1;
909 #if 0
910 /* Return true if FACE is suitable for displaying character C.
911 Called from the macro FACE_SUITABLE_FOR_CHAR_P
912 when C is not an ASCII character. */
914 bool
915 face_suitable_for_char_p (struct face *face, int c)
917 Lisp_Object fontset, rfont_def;
919 fontset = FONTSET_FROM_ID (face->fontset);
920 rfont_def = fontset_font (fontset, c, NULL, -1);
921 return (VECTORP (rfont_def)
922 && INTEGERP (RFONT_DEF_FACE (rfont_def))
923 && face->id == XINT (RFONT_DEF_FACE (rfont_def)));
925 #endif
928 /* Return ID of face suitable for displaying character C on frame F.
929 FACE must be realized for ASCII characters in advance. Called from
930 the macro FACE_FOR_CHAR. */
933 face_for_char (FRAME_PTR f, struct face *face, int c, int pos, Lisp_Object object)
935 Lisp_Object fontset, rfont_def, charset;
936 int face_id;
937 int id;
939 /* If face->fontset is negative (that happens when no font is found
940 for face), just return face->ascii_face because we can't do
941 anything. Perhaps, we should fix the callers to assure
942 that face->fontset is always valid. */
943 if (ASCII_CHAR_P (c) || face->fontset < 0)
944 return face->ascii_face->id;
946 eassert (fontset_id_valid_p (face->fontset));
947 fontset = FONTSET_FROM_ID (face->fontset);
948 eassert (!BASE_FONTSET_P (fontset));
950 if (pos < 0)
952 id = -1;
953 charset = Qnil;
955 else
957 charset = Fget_char_property (make_number (pos), Qcharset, object);
958 if (CHARSETP (charset))
960 Lisp_Object val;
962 val = assq_no_quit (charset, Vfont_encoding_charset_alist);
963 if (CONSP (val) && CHARSETP (XCDR (val)))
964 charset = XCDR (val);
965 id = XINT (CHARSET_SYMBOL_ID (charset));
967 else
968 id = -1;
971 rfont_def = fontset_font (fontset, c, face, id);
972 if (VECTORP (rfont_def))
974 if (INTEGERP (RFONT_DEF_FACE (rfont_def)))
975 face_id = XINT (RFONT_DEF_FACE (rfont_def));
976 else
978 Lisp_Object font_object;
980 font_object = RFONT_DEF_OBJECT (rfont_def);
981 face_id = face_for_font (f, font_object, face);
982 RFONT_DEF_SET_FACE (rfont_def, face_id);
985 else
987 if (INTEGERP (FONTSET_NOFONT_FACE (fontset)))
988 face_id = XINT (FONTSET_NOFONT_FACE (fontset));
989 else
991 face_id = face_for_font (f, Qnil, face);
992 set_fontset_nofont_face (fontset, make_number (face_id));
995 eassert (face_id >= 0);
996 return face_id;
1000 Lisp_Object
1001 font_for_char (struct face *face, int c, int pos, Lisp_Object object)
1003 Lisp_Object fontset, rfont_def, charset;
1004 int id;
1006 if (ASCII_CHAR_P (c))
1008 Lisp_Object font_object;
1010 XSETFONT (font_object, face->ascii_face->font);
1011 return font_object;
1014 eassert (fontset_id_valid_p (face->fontset));
1015 fontset = FONTSET_FROM_ID (face->fontset);
1016 eassert (!BASE_FONTSET_P (fontset));
1017 if (pos < 0)
1019 id = -1;
1020 charset = Qnil;
1022 else
1024 charset = Fget_char_property (make_number (pos), Qcharset, object);
1025 if (CHARSETP (charset))
1027 Lisp_Object val;
1029 val = assq_no_quit (charset, Vfont_encoding_charset_alist);
1030 if (CONSP (val) && CHARSETP (XCDR (val)))
1031 charset = XCDR (val);
1032 id = XINT (CHARSET_SYMBOL_ID (charset));
1034 else
1035 id = -1;
1038 rfont_def = fontset_font (fontset, c, face, id);
1039 return (VECTORP (rfont_def)
1040 ? RFONT_DEF_OBJECT (rfont_def)
1041 : Qnil);
1045 /* Make a realized fontset for ASCII face FACE on frame F from the
1046 base fontset BASE_FONTSET_ID. If BASE_FONTSET_ID is -1, use the
1047 default fontset as the base. Value is the id of the new fontset.
1048 Called from realize_x_face. */
1051 make_fontset_for_ascii_face (FRAME_PTR f, int base_fontset_id, struct face *face)
1053 Lisp_Object base_fontset, fontset, frame;
1055 XSETFRAME (frame, f);
1056 if (base_fontset_id >= 0)
1058 base_fontset = FONTSET_FROM_ID (base_fontset_id);
1059 if (!BASE_FONTSET_P (base_fontset))
1060 base_fontset = FONTSET_BASE (base_fontset);
1061 eassert (BASE_FONTSET_P (base_fontset));
1063 else
1064 base_fontset = Vdefault_fontset;
1066 fontset = make_fontset (frame, Qnil, base_fontset);
1067 return XINT (FONTSET_ID (fontset));
1072 /* Cache data used by fontset_pattern_regexp. The car part is a
1073 pattern string containing at least one wild card, the cdr part is
1074 the corresponding regular expression. */
1075 static Lisp_Object Vcached_fontset_data;
1077 #define CACHED_FONTSET_NAME SSDATA (XCAR (Vcached_fontset_data))
1078 #define CACHED_FONTSET_REGEX (XCDR (Vcached_fontset_data))
1080 /* If fontset name PATTERN contains any wild card, return regular
1081 expression corresponding to PATTERN. */
1083 static Lisp_Object
1084 fontset_pattern_regexp (Lisp_Object pattern)
1086 if (!strchr (SSDATA (pattern), '*')
1087 && !strchr (SSDATA (pattern), '?'))
1088 /* PATTERN does not contain any wild cards. */
1089 return Qnil;
1091 if (!CONSP (Vcached_fontset_data)
1092 || strcmp (SSDATA (pattern), CACHED_FONTSET_NAME))
1094 /* We must at first update the cached data. */
1095 unsigned char *regex, *p0, *p1;
1096 int ndashes = 0, nstars = 0, nescs = 0;
1098 for (p0 = SDATA (pattern); *p0; p0++)
1100 if (*p0 == '-')
1101 ndashes++;
1102 else if (*p0 == '*')
1103 nstars++;
1104 else if (*p0 == '['
1105 || *p0 == '.' || *p0 == '\\'
1106 || *p0 == '+' || *p0 == '^'
1107 || *p0 == '$')
1108 nescs++;
1111 /* If PATTERN is not full XLFD we convert "*" to ".*". Otherwise
1112 we convert "*" to "[^-]*" which is much faster in regular
1113 expression matching. */
1114 if (ndashes < 14)
1115 p1 = regex = alloca (SBYTES (pattern) + 2 * nstars + 2 * nescs + 1);
1116 else
1117 p1 = regex = alloca (SBYTES (pattern) + 5 * nstars + 2 * nescs + 1);
1119 *p1++ = '^';
1120 for (p0 = SDATA (pattern); *p0; p0++)
1122 if (*p0 == '*')
1124 if (ndashes < 14)
1125 *p1++ = '.';
1126 else
1127 *p1++ = '[', *p1++ = '^', *p1++ = '-', *p1++ = ']';
1128 *p1++ = '*';
1130 else if (*p0 == '?')
1131 *p1++ = '.';
1132 else if (*p0 == '['
1133 || *p0 == '.' || *p0 == '\\'
1134 || *p0 == '+' || *p0 == '^'
1135 || *p0 == '$')
1136 *p1++ = '\\', *p1++ = *p0;
1137 else
1138 *p1++ = *p0;
1140 *p1++ = '$';
1141 *p1++ = 0;
1143 Vcached_fontset_data = Fcons (build_string (SSDATA (pattern)),
1144 build_string ((char *) regex));
1147 return CACHED_FONTSET_REGEX;
1150 /* Return ID of the base fontset named NAME. If there's no such
1151 fontset, return -1. NAME_PATTERN specifies how to treat NAME as this:
1152 0: pattern containing '*' and '?' as wildcards
1153 1: regular expression
1154 2: literal fontset name
1158 fs_query_fontset (Lisp_Object name, int name_pattern)
1160 Lisp_Object tem;
1161 int i;
1163 name = Fdowncase (name);
1164 if (name_pattern != 1)
1166 tem = Frassoc (name, Vfontset_alias_alist);
1167 if (NILP (tem))
1168 tem = Fassoc (name, Vfontset_alias_alist);
1169 if (CONSP (tem) && STRINGP (XCAR (tem)))
1170 name = XCAR (tem);
1171 else if (name_pattern == 0)
1173 tem = fontset_pattern_regexp (name);
1174 if (STRINGP (tem))
1176 name = tem;
1177 name_pattern = 1;
1182 for (i = 0; i < ASIZE (Vfontset_table); i++)
1184 Lisp_Object fontset, this_name;
1186 fontset = FONTSET_FROM_ID (i);
1187 if (NILP (fontset)
1188 || !BASE_FONTSET_P (fontset))
1189 continue;
1191 this_name = FONTSET_NAME (fontset);
1192 if (name_pattern == 1
1193 ? fast_string_match_ignore_case (name, this_name) >= 0
1194 : !xstrcasecmp (SSDATA (name), SSDATA (this_name)))
1195 return i;
1197 return -1;
1201 DEFUN ("query-fontset", Fquery_fontset, Squery_fontset, 1, 2, 0,
1202 doc: /* Return the name of a fontset that matches PATTERN.
1203 The value is nil if there is no matching fontset.
1204 PATTERN can contain `*' or `?' as a wildcard
1205 just as X font name matching algorithm allows.
1206 If REGEXPP is non-nil, PATTERN is a regular expression. */)
1207 (Lisp_Object pattern, Lisp_Object regexpp)
1209 Lisp_Object fontset;
1210 int id;
1212 check_window_system (NULL);
1214 CHECK_STRING (pattern);
1216 if (SCHARS (pattern) == 0)
1217 return Qnil;
1219 id = fs_query_fontset (pattern, !NILP (regexpp));
1220 if (id < 0)
1221 return Qnil;
1223 fontset = FONTSET_FROM_ID (id);
1224 return FONTSET_NAME (fontset);
1227 /* Return a list of base fontset names matching PATTERN on frame F. */
1229 Lisp_Object
1230 list_fontsets (FRAME_PTR f, Lisp_Object pattern, int size)
1232 Lisp_Object frame, regexp, val;
1233 int id;
1235 XSETFRAME (frame, f);
1237 regexp = fontset_pattern_regexp (pattern);
1238 val = Qnil;
1240 for (id = 0; id < ASIZE (Vfontset_table); id++)
1242 Lisp_Object fontset, name;
1244 fontset = FONTSET_FROM_ID (id);
1245 if (NILP (fontset)
1246 || !BASE_FONTSET_P (fontset)
1247 || !EQ (frame, FONTSET_FRAME (fontset)))
1248 continue;
1249 name = FONTSET_NAME (fontset);
1251 if (STRINGP (regexp)
1252 ? (fast_string_match (regexp, name) < 0)
1253 : strcmp (SSDATA (pattern), SSDATA (name)))
1254 continue;
1256 val = Fcons (Fcopy_sequence (FONTSET_NAME (fontset)), val);
1259 return val;
1263 /* Free all realized fontsets whose base fontset is BASE. */
1265 static void
1266 free_realized_fontsets (Lisp_Object base)
1268 int id;
1270 #if 0
1271 /* For the moment, this doesn't work because free_realized_face
1272 doesn't remove FACE from a cache. Until we find a solution, we
1273 suppress this code, and simply use Fclear_face_cache even though
1274 that is not efficient. */
1275 block_input ();
1276 for (id = 0; id < ASIZE (Vfontset_table); id++)
1278 Lisp_Object this = AREF (Vfontset_table, id);
1280 if (EQ (FONTSET_BASE (this), base))
1282 Lisp_Object tail;
1284 for (tail = FONTSET_FACE_ALIST (this); CONSP (tail);
1285 tail = XCDR (tail))
1287 FRAME_PTR f = XFRAME (FONTSET_FRAME (this));
1288 int face_id = XINT (XCDR (XCAR (tail)));
1289 struct face *face = FACE_FROM_ID (f, face_id);
1291 /* Face THIS itself is also freed by the following call. */
1292 free_realized_face (f, face);
1296 unblock_input ();
1297 #else /* not 0 */
1298 /* But, we don't have to call Fclear_face_cache if no fontset has
1299 been realized from BASE. */
1300 for (id = 0; id < ASIZE (Vfontset_table); id++)
1302 Lisp_Object this = AREF (Vfontset_table, id);
1304 if (CHAR_TABLE_P (this) && EQ (FONTSET_BASE (this), base))
1306 Fclear_face_cache (Qt);
1307 break;
1310 #endif /* not 0 */
1314 /* Check validity of NAME as a fontset name and return the
1315 corresponding fontset. If not valid, signal an error.
1317 If NAME is t, return Vdefault_fontset. If NAME is nil, return the
1318 fontset of *FRAME.
1320 Set *FRAME to the actual frame. */
1322 static Lisp_Object
1323 check_fontset_name (Lisp_Object name, Lisp_Object *frame)
1325 int id;
1326 struct frame *f = decode_live_frame (*frame);
1328 XSETFRAME (*frame, f);
1330 if (EQ (name, Qt))
1331 return Vdefault_fontset;
1332 if (NILP (name))
1333 id = FRAME_FONTSET (f);
1334 else
1336 CHECK_STRING (name);
1337 /* First try NAME as literal. */
1338 id = fs_query_fontset (name, 2);
1339 if (id < 0)
1340 /* For backward compatibility, try again NAME as pattern. */
1341 id = fs_query_fontset (name, 0);
1342 if (id < 0)
1343 error ("Fontset `%s' does not exist", SDATA (name));
1345 return FONTSET_FROM_ID (id);
1348 static void
1349 accumulate_script_ranges (Lisp_Object arg, Lisp_Object range, Lisp_Object val)
1351 if (EQ (XCAR (arg), val))
1353 if (CONSP (range))
1354 XSETCDR (arg, Fcons (Fcons (XCAR (range), XCDR (range)), XCDR (arg)));
1355 else
1356 XSETCDR (arg, Fcons (Fcons (range, range), XCDR (arg)));
1361 /* Callback function for map_charset_chars in Fset_fontset_font.
1362 ARG is a vector [ FONTSET FONT_DEF ADD ASCII SCRIPT_RANGE_LIST ].
1364 In FONTSET, set FONT_DEF in a fashion specified by ADD for
1365 characters in RANGE and ranges in SCRIPT_RANGE_LIST before RANGE.
1366 The consumed ranges are popped up from SCRIPT_RANGE_LIST, and the
1367 new SCRIPT_RANGE_LIST is stored in ARG.
1369 If ASCII is nil, don't set FONT_DEF for ASCII characters. It is
1370 assured that SCRIPT_RANGE_LIST doesn't contain ASCII in that
1371 case. */
1373 static void
1374 set_fontset_font (Lisp_Object arg, Lisp_Object range)
1376 Lisp_Object fontset, font_def, add, ascii, script_range_list;
1377 int from = XINT (XCAR (range)), to = XINT (XCDR (range));
1379 fontset = AREF (arg, 0);
1380 font_def = AREF (arg, 1);
1381 add = AREF (arg, 2);
1382 ascii = AREF (arg, 3);
1383 script_range_list = AREF (arg, 4);
1385 if (NILP (ascii) && from < 0x80)
1387 if (to < 0x80)
1388 return;
1389 from = 0x80;
1390 range = Fcons (make_number (0x80), XCDR (range));
1393 #define SCRIPT_FROM XINT (XCAR (XCAR (script_range_list)))
1394 #define SCRIPT_TO XINT (XCDR (XCAR (script_range_list)))
1395 #define POP_SCRIPT_RANGE() script_range_list = XCDR (script_range_list)
1397 for (; CONSP (script_range_list) && SCRIPT_TO < from; POP_SCRIPT_RANGE ())
1398 FONTSET_ADD (fontset, XCAR (script_range_list), font_def, add);
1399 if (CONSP (script_range_list))
1401 if (SCRIPT_FROM < from)
1402 range = Fcons (make_number (SCRIPT_FROM), XCDR (range));
1403 while (CONSP (script_range_list) && SCRIPT_TO <= to)
1404 POP_SCRIPT_RANGE ();
1405 if (CONSP (script_range_list) && SCRIPT_FROM <= to)
1406 XSETCAR (XCAR (script_range_list), make_number (to + 1));
1409 FONTSET_ADD (fontset, range, font_def, add);
1410 ASET (arg, 4, script_range_list);
1413 static void update_auto_fontset_alist (Lisp_Object, Lisp_Object);
1416 DEFUN ("set-fontset-font", Fset_fontset_font, Sset_fontset_font, 3, 5, 0,
1417 doc: /*
1418 Modify fontset NAME to use FONT-SPEC for TARGET characters.
1420 NAME is a fontset name string, nil for the fontset of FRAME, or t for
1421 the default fontset.
1423 TARGET may be a cons; (FROM . TO), where FROM and TO are characters.
1424 In that case, use FONT-SPEC for all characters in the range FROM and
1425 TO (inclusive).
1427 TARGET may be a script name symbol. In that case, use FONT-SPEC for
1428 all characters that belong to the script.
1430 TARGET may be a charset. In that case, use FONT-SPEC for all
1431 characters in the charset.
1433 TARGET may be nil. In that case, use FONT-SPEC for any characters for
1434 that no FONT-SPEC is specified.
1436 FONT-SPEC may one of these:
1437 * A font-spec object made by the function `font-spec' (which see).
1438 * A cons (FAMILY . REGISTRY), where FAMILY is a font family name and
1439 REGISTRY is a font registry name. FAMILY may contain foundry
1440 name, and REGISTRY may contain encoding name.
1441 * A font name string.
1442 * nil, which explicitly specifies that there's no font for TARGET.
1444 Optional 4th argument FRAME is a frame or nil for the selected frame
1445 that is concerned in the case that NAME is nil.
1447 Optional 5th argument ADD, if non-nil, specifies how to add FONT-SPEC
1448 to the font specifications for TARGET previously set. If it is
1449 `prepend', FONT-SPEC is prepended. If it is `append', FONT-SPEC is
1450 appended. By default, FONT-SPEC overrides the previous settings. */)
1451 (Lisp_Object name, Lisp_Object target, Lisp_Object font_spec, Lisp_Object frame, Lisp_Object add)
1453 Lisp_Object fontset;
1454 Lisp_Object font_def, registry, family;
1455 Lisp_Object range_list;
1456 struct charset *charset = NULL;
1457 Lisp_Object fontname;
1458 bool ascii_changed = 0;
1460 fontset = check_fontset_name (name, &frame);
1462 fontname = Qnil;
1463 if (CONSP (font_spec))
1465 Lisp_Object spec = Ffont_spec (0, NULL);
1467 font_parse_family_registry (XCAR (font_spec), XCDR (font_spec), spec);
1468 font_spec = spec;
1469 fontname = Ffont_xlfd_name (font_spec, Qnil);
1471 else if (STRINGP (font_spec))
1473 Lisp_Object args[2];
1475 fontname = font_spec;
1476 args[0] = QCname;
1477 args[1] = font_spec;
1478 font_spec = Ffont_spec (2, args);
1480 else if (FONT_SPEC_P (font_spec))
1481 fontname = Ffont_xlfd_name (font_spec, Qnil);
1482 else if (! NILP (font_spec))
1483 Fsignal (Qfont, list2 (build_string ("Invalid font-spec"), font_spec));
1485 if (! NILP (font_spec))
1487 Lisp_Object encoding, repertory;
1489 family = AREF (font_spec, FONT_FAMILY_INDEX);
1490 if (! NILP (family) )
1491 family = SYMBOL_NAME (family);
1492 registry = AREF (font_spec, FONT_REGISTRY_INDEX);
1493 if (! NILP (registry))
1494 registry = Fdowncase (SYMBOL_NAME (registry));
1495 encoding = find_font_encoding (concat3 (family, build_string ("-"),
1496 registry));
1497 if (NILP (encoding))
1498 encoding = Qascii;
1500 if (SYMBOLP (encoding))
1502 CHECK_CHARSET (encoding);
1503 encoding = repertory = CHARSET_SYMBOL_ID (encoding);
1505 else
1507 repertory = XCDR (encoding);
1508 encoding = XCAR (encoding);
1509 CHECK_CHARSET (encoding);
1510 encoding = CHARSET_SYMBOL_ID (encoding);
1511 if (! NILP (repertory) && SYMBOLP (repertory))
1513 CHECK_CHARSET (repertory);
1514 repertory = CHARSET_SYMBOL_ID (repertory);
1517 FONT_DEF_NEW (font_def, font_spec, encoding, repertory);
1519 else
1520 font_def = Qnil;
1522 if (CHARACTERP (target))
1524 if (XFASTINT (target) < 0x80)
1525 error ("Can't set a font for partial ASCII range");
1526 range_list = Fcons (Fcons (target, target), Qnil);
1528 else if (CONSP (target))
1530 Lisp_Object from, to;
1532 from = Fcar (target);
1533 to = Fcdr (target);
1534 CHECK_CHARACTER (from);
1535 CHECK_CHARACTER (to);
1536 if (XFASTINT (from) < 0x80)
1538 if (XFASTINT (from) != 0 || XFASTINT (to) < 0x7F)
1539 error ("Can't set a font for partial ASCII range");
1540 ascii_changed = 1;
1542 range_list = Fcons (target, Qnil);
1544 else if (SYMBOLP (target) && !NILP (target))
1546 Lisp_Object script_list;
1547 Lisp_Object val;
1549 range_list = Qnil;
1550 script_list = XCHAR_TABLE (Vchar_script_table)->extras[0];
1551 if (! NILP (Fmemq (target, script_list)))
1553 if (EQ (target, Qlatin))
1554 ascii_changed = 1;
1555 val = Fcons (target, Qnil);
1556 map_char_table (accumulate_script_ranges, Qnil, Vchar_script_table,
1557 val);
1558 range_list = Fnreverse (XCDR (val));
1560 if (CHARSETP (target))
1562 CHECK_CHARSET_GET_CHARSET (target, charset);
1563 if (charset->ascii_compatible_p)
1564 ascii_changed = 1;
1566 else if (NILP (range_list))
1567 error ("Invalid script or charset name: %s",
1568 SDATA (SYMBOL_NAME (target)));
1570 else if (NILP (target))
1571 range_list = Fcons (Qnil, Qnil);
1572 else
1573 error ("Invalid target for setting a font");
1575 if (ascii_changed)
1577 Lisp_Object val;
1579 if (NILP (font_spec))
1580 error ("Can't set ASCII font to nil");
1581 val = CHAR_TABLE_REF (fontset, 0);
1582 if (! NILP (val) && EQ (add, Qappend))
1583 /* We are going to change just an additional font for ASCII. */
1584 ascii_changed = 0;
1587 if (charset)
1589 Lisp_Object arg;
1591 arg = make_uninit_vector (5);
1592 ASET (arg, 0, fontset);
1593 ASET (arg, 1, font_def);
1594 ASET (arg, 2, add);
1595 ASET (arg, 3, ascii_changed ? Qt : Qnil);
1596 ASET (arg, 4, range_list);
1598 map_charset_chars (set_fontset_font, Qnil, arg, charset,
1599 CHARSET_MIN_CODE (charset),
1600 CHARSET_MAX_CODE (charset));
1601 range_list = AREF (arg, 4);
1603 for (; CONSP (range_list); range_list = XCDR (range_list))
1604 FONTSET_ADD (fontset, XCAR (range_list), font_def, add);
1606 if (ascii_changed)
1608 Lisp_Object tail, fr, alist;
1609 int fontset_id = XINT (FONTSET_ID (fontset));
1611 set_fontset_ascii (fontset, fontname);
1612 name = FONTSET_NAME (fontset);
1613 FOR_EACH_FRAME (tail, fr)
1615 FRAME_PTR f = XFRAME (fr);
1616 Lisp_Object font_object;
1617 struct face *face;
1619 if (FRAME_INITIAL_P (f) || FRAME_TERMCAP_P (f))
1620 continue;
1621 if (fontset_id != FRAME_FONTSET (f))
1622 continue;
1623 face = FACE_FROM_ID (f, DEFAULT_FACE_ID);
1624 if (face)
1625 font_object = font_load_for_lface (f, face->lface, font_spec);
1626 else
1627 font_object = font_open_by_spec (f, font_spec);
1628 if (! NILP (font_object))
1630 update_auto_fontset_alist (font_object, fontset);
1631 alist = Fcons (Fcons (Qfont, Fcons (name, font_object)), Qnil);
1632 Fmodify_frame_parameters (fr, alist);
1637 /* Free all realized fontsets whose base is FONTSET. This way, the
1638 specified character(s) are surely redisplayed by a correct
1639 font. */
1640 free_realized_fontsets (fontset);
1642 return Qnil;
1646 DEFUN ("new-fontset", Fnew_fontset, Snew_fontset, 2, 2, 0,
1647 doc: /* Create a new fontset NAME from font information in FONTLIST.
1649 FONTLIST is an alist of scripts vs the corresponding font specification list.
1650 Each element of FONTLIST has the form (SCRIPT FONT-SPEC ...), where a
1651 character of SCRIPT is displayed by a font that matches one of
1652 FONT-SPEC.
1654 SCRIPT is a symbol that appears in the first extra slot of the
1655 char-table `char-script-table'.
1657 FONT-SPEC is a vector, a cons, or a string. See the documentation of
1658 `set-fontset-font' for the meaning. */)
1659 (Lisp_Object name, Lisp_Object fontlist)
1661 Lisp_Object fontset;
1662 int id;
1664 CHECK_STRING (name);
1665 CHECK_LIST (fontlist);
1667 name = Fdowncase (name);
1668 id = fs_query_fontset (name, 0);
1669 if (id < 0)
1671 Lisp_Object font_spec = Ffont_spec (0, NULL);
1672 Lisp_Object short_name;
1673 char xlfd[256];
1674 int len;
1676 if (font_parse_xlfd (SSDATA (name), SBYTES (name), font_spec) < 0)
1677 error ("Fontset name must be in XLFD format");
1678 short_name = AREF (font_spec, FONT_REGISTRY_INDEX);
1679 if (strncmp (SSDATA (SYMBOL_NAME (short_name)), "fontset-", 8)
1680 || SBYTES (SYMBOL_NAME (short_name)) < 9)
1681 error ("Registry field of fontset name must be \"fontset-*\"");
1682 Vfontset_alias_alist = Fcons (Fcons (name, SYMBOL_NAME (short_name)),
1683 Vfontset_alias_alist);
1684 ASET (font_spec, FONT_REGISTRY_INDEX, Qiso8859_1);
1685 fontset = make_fontset (Qnil, name, Qnil);
1686 len = font_unparse_xlfd (font_spec, 0, xlfd, 256);
1687 if (len < 0)
1688 error ("Invalid fontset name (perhaps too long): %s", SDATA (name));
1689 set_fontset_ascii (fontset, make_unibyte_string (xlfd, len));
1691 else
1693 fontset = FONTSET_FROM_ID (id);
1694 free_realized_fontsets (fontset);
1695 Fset_char_table_range (fontset, Qt, Qnil);
1698 for (; CONSP (fontlist); fontlist = XCDR (fontlist))
1700 Lisp_Object elt, script;
1702 elt = XCAR (fontlist);
1703 script = Fcar (elt);
1704 elt = Fcdr (elt);
1705 if (CONSP (elt) && (NILP (XCDR (elt)) || CONSP (XCDR (elt))))
1706 for (; CONSP (elt); elt = XCDR (elt))
1707 Fset_fontset_font (name, script, XCAR (elt), Qnil, Qappend);
1708 else
1709 Fset_fontset_font (name, script, elt, Qnil, Qappend);
1711 return name;
1715 /* Alist of automatically created fontsets. Each element is a cons
1716 (FONT-SPEC . FONTSET-ID). */
1717 static Lisp_Object auto_fontset_alist;
1719 /* Number of automatically created fontsets. */
1720 static ptrdiff_t num_auto_fontsets;
1722 /* Return a fontset synthesized from FONT-OBJECT. This is called from
1723 x_new_font when FONT-OBJECT is used for the default ASCII font of a
1724 frame, and the returned fontset is used for the default fontset of
1725 that frame. The fontset specifies a font of the same registry as
1726 FONT-OBJECT for all characters in the repertory of the registry
1727 (see Vfont_encoding_alist). If the repertory is not known, the
1728 fontset specifies the font for all Latin characters assuming that a
1729 user intends to use FONT-OBJECT for Latin characters. */
1732 fontset_from_font (Lisp_Object font_object)
1734 Lisp_Object font_name = font_get_name (font_object);
1735 Lisp_Object font_spec = copy_font_spec (font_object);
1736 Lisp_Object registry = AREF (font_spec, FONT_REGISTRY_INDEX);
1737 Lisp_Object fontset_spec, alias, name, fontset;
1738 Lisp_Object val;
1740 val = assoc_no_quit (font_spec, auto_fontset_alist);
1741 if (CONSP (val))
1742 return XINT (FONTSET_ID (XCDR (val)));
1743 if (num_auto_fontsets++ == 0)
1744 alias = intern ("fontset-startup");
1745 else
1747 char temp[sizeof "fontset-auto" + INT_STRLEN_BOUND (ptrdiff_t)];
1749 sprintf (temp, "fontset-auto%"pD"d", num_auto_fontsets - 1);
1750 alias = intern (temp);
1752 fontset_spec = copy_font_spec (font_spec);
1753 ASET (fontset_spec, FONT_REGISTRY_INDEX, alias);
1754 name = Ffont_xlfd_name (fontset_spec, Qnil);
1755 eassert (!NILP (name));
1756 fontset = make_fontset (Qnil, name, Qnil);
1757 Vfontset_alias_alist = Fcons (Fcons (name, SYMBOL_NAME (alias)),
1758 Vfontset_alias_alist);
1759 alias = Fdowncase (AREF (font_object, FONT_NAME_INDEX));
1760 Vfontset_alias_alist = Fcons (Fcons (name, alias), Vfontset_alias_alist);
1761 auto_fontset_alist = Fcons (Fcons (font_spec, fontset), auto_fontset_alist);
1762 font_spec = Ffont_spec (0, NULL);
1763 ASET (font_spec, FONT_REGISTRY_INDEX, registry);
1765 Lisp_Object target = find_font_encoding (SYMBOL_NAME (registry));
1767 if (CONSP (target))
1768 target = XCDR (target);
1769 if (! CHARSETP (target))
1770 target = Qlatin;
1771 Fset_fontset_font (name, target, font_spec, Qnil, Qnil);
1772 Fset_fontset_font (name, Qnil, font_spec, Qnil, Qnil);
1775 set_fontset_ascii (fontset, font_name);
1777 return XINT (FONTSET_ID (fontset));
1781 /* Update auto_fontset_alist for FONTSET. When an ASCII font of
1782 FONTSET is changed, we delete an entry of FONTSET if any from
1783 auto_fontset_alist so that FONTSET is not re-used by
1784 fontset_from_font. */
1786 static void
1787 update_auto_fontset_alist (Lisp_Object font_object, Lisp_Object fontset)
1789 Lisp_Object prev, tail;
1791 for (prev = Qnil, tail = auto_fontset_alist; CONSP (tail);
1792 prev = tail, tail = XCDR (tail))
1793 if (EQ (fontset, XCDR (XCAR (tail))))
1795 if (NILP (prev))
1796 auto_fontset_alist = XCDR (tail);
1797 else
1798 XSETCDR (prev, XCDR (tail));
1799 break;
1804 /* Return a cons (FONT-OBJECT . GLYPH-CODE).
1805 FONT-OBJECT is the font for the character at POSITION in the current
1806 buffer. This is computed from all the text properties and overlays
1807 that apply to POSITION. POSITION may be nil, in which case,
1808 FONT-SPEC is the font for displaying the character CH with the
1809 default face.
1811 GLYPH-CODE is the glyph code in the font to use for the character.
1813 If the 2nd optional arg CH is non-nil, it is a character to check
1814 the font instead of the character at POSITION.
1816 It returns nil in the following cases:
1818 (1) The window system doesn't have a font for the character (thus
1819 it is displayed by an empty box).
1821 (2) The character code is invalid.
1823 (3) If POSITION is not nil, and the current buffer is not displayed
1824 in any window.
1826 In addition, the returned font name may not take into account of
1827 such redisplay engine hooks as what used in jit-lock-mode if
1828 POSITION is currently not visible. */
1831 DEFUN ("internal-char-font", Finternal_char_font, Sinternal_char_font, 1, 2, 0,
1832 doc: /* For internal use only. */)
1833 (Lisp_Object position, Lisp_Object ch)
1835 ptrdiff_t pos, pos_byte, dummy;
1836 int face_id;
1837 int c;
1838 struct frame *f;
1839 struct face *face;
1841 if (NILP (position))
1843 CHECK_CHARACTER (ch);
1844 c = XINT (ch);
1845 f = XFRAME (selected_frame);
1846 face_id = lookup_basic_face (f, DEFAULT_FACE_ID);
1847 pos = -1;
1849 else
1851 Lisp_Object window;
1852 struct window *w;
1854 CHECK_NUMBER_COERCE_MARKER (position);
1855 if (! (BEGV <= XINT (position) && XINT (position) < ZV))
1856 args_out_of_range_3 (position, make_number (BEGV), make_number (ZV));
1857 pos = XINT (position);
1858 pos_byte = CHAR_TO_BYTE (pos);
1859 if (NILP (ch))
1860 c = FETCH_CHAR (pos_byte);
1861 else
1863 CHECK_NATNUM (ch);
1864 c = XINT (ch);
1866 window = Fget_buffer_window (Fcurrent_buffer (), Qnil);
1867 if (NILP (window))
1868 return Qnil;
1869 w = XWINDOW (window);
1870 f = XFRAME (w->frame);
1871 face_id = face_at_buffer_position (w, pos, -1, -1, &dummy,
1872 pos + 100, 0, -1);
1874 if (! CHAR_VALID_P (c))
1875 return Qnil;
1876 if (!FRAME_WINDOW_P (f))
1877 return Qnil;
1878 face_id = FACE_FOR_CHAR (f, FACE_FROM_ID (f, face_id), c, pos, Qnil);
1879 face = FACE_FROM_ID (f, face_id);
1880 if (face->font)
1882 unsigned code = face->font->driver->encode_char (face->font, c);
1883 Lisp_Object font_object;
1885 if (code == FONT_INVALID_CODE)
1886 return Qnil;
1887 XSETFONT (font_object, face->font);
1888 return Fcons (font_object, INTEGER_TO_CONS (code));
1890 return Qnil;
1894 DEFUN ("fontset-info", Ffontset_info, Sfontset_info, 1, 2, 0,
1895 doc: /* Return information about a fontset FONTSET on frame FRAME.
1897 FONTSET is a fontset name string, nil for the fontset of FRAME, or t
1898 for the default fontset. FRAME nil means the selected frame.
1900 The value is a char-table whose elements have this form:
1902 ((FONT OPENED-FONT ...) ...)
1904 FONT is a name of font specified for a range of characters.
1906 OPENED-FONT is a name of a font actually opened.
1908 The char-table has one extra slot. If FONTSET is not the default
1909 fontset, the value the extra slot is a char-table containing the
1910 information about the derived fonts from the default fontset. The
1911 format is the same as above. */)
1912 (Lisp_Object fontset, Lisp_Object frame)
1914 Lisp_Object *realized[2], fontsets[2], tables[2];
1915 Lisp_Object val, elt;
1916 int c, i, j, k;
1918 check_window_system (NULL);
1919 fontset = check_fontset_name (fontset, &frame);
1921 /* Recode fontsets realized on FRAME from the base fontset FONTSET
1922 in the table `realized'. */
1923 realized[0] = alloca (word_size * ASIZE (Vfontset_table));
1924 for (i = j = 0; i < ASIZE (Vfontset_table); i++)
1926 elt = FONTSET_FROM_ID (i);
1927 if (!NILP (elt)
1928 && EQ (FONTSET_BASE (elt), fontset)
1929 && EQ (FONTSET_FRAME (elt), frame))
1930 realized[0][j++] = elt;
1932 realized[0][j] = Qnil;
1934 realized[1] = alloca (word_size * ASIZE (Vfontset_table));
1935 for (i = j = 0; ! NILP (realized[0][i]); i++)
1937 elt = FONTSET_DEFAULT (realized[0][i]);
1938 if (! NILP (elt))
1939 realized[1][j++] = elt;
1941 realized[1][j] = Qnil;
1943 tables[0] = Fmake_char_table (Qfontset_info, Qnil);
1944 fontsets[0] = fontset;
1945 if (!EQ (fontset, Vdefault_fontset))
1947 tables[1] = Fmake_char_table (Qnil, Qnil);
1948 set_char_table_extras (tables[0], 0, tables[1]);
1949 fontsets[1] = Vdefault_fontset;
1952 /* Accumulate information of the fontset in TABLE. The format of
1953 each element is ((FONT-SPEC OPENED-FONT ...) ...). */
1954 for (k = 0; k <= 1; k++)
1956 for (c = 0; c <= MAX_CHAR; )
1958 int from = c, to = MAX_5_BYTE_CHAR;
1960 if (c <= MAX_5_BYTE_CHAR)
1962 val = char_table_ref_and_range (fontsets[k], c, &from, &to);
1964 else
1966 val = FONTSET_FALLBACK (fontsets[k]);
1967 to = MAX_CHAR;
1969 if (VECTORP (val))
1971 Lisp_Object alist;
1973 /* At first, set ALIST to ((FONT-SPEC) ...). */
1974 for (alist = Qnil, i = 0; i < ASIZE (val); i++)
1975 if (! NILP (AREF (val, i)))
1976 alist = Fcons (Fcons (FONT_DEF_SPEC (AREF (val, i)), Qnil),
1977 alist);
1978 alist = Fnreverse (alist);
1980 /* Then store opened font names to cdr of each elements. */
1981 for (i = 0; ! NILP (realized[k][i]); i++)
1983 if (c <= MAX_5_BYTE_CHAR)
1984 val = FONTSET_REF (realized[k][i], c);
1985 else
1986 val = FONTSET_FALLBACK (realized[k][i]);
1987 if (! CONSP (val) || ! VECTORP (XCDR (val)))
1988 continue;
1989 /* VAL: (int . [[FACE-ID FONT-DEF FONT-OBJECT int] ... ]) */
1990 val = XCDR (val);
1991 for (j = 0; j < ASIZE (val); j++)
1993 elt = AREF (val, j);
1994 if (FONT_OBJECT_P (RFONT_DEF_OBJECT (elt)))
1996 Lisp_Object font_object = RFONT_DEF_OBJECT (elt);
1997 Lisp_Object slot, name;
1999 slot = Fassq (RFONT_DEF_SPEC (elt), alist);
2000 name = AREF (font_object, FONT_NAME_INDEX);
2001 if (NILP (Fmember (name, XCDR (slot))))
2002 nconc2 (slot, Fcons (name, Qnil));
2007 /* Store ALIST in TBL for characters C..TO. */
2008 if (c <= MAX_5_BYTE_CHAR)
2009 char_table_set_range (tables[k], c, to, alist);
2010 else
2011 set_char_table_defalt (tables[k], alist);
2013 /* At last, change each elements to font names. */
2014 for (; CONSP (alist); alist = XCDR (alist))
2016 elt = XCAR (alist);
2017 XSETCAR (elt, Ffont_xlfd_name (XCAR (elt), Qnil));
2020 c = to + 1;
2022 if (EQ (fontset, Vdefault_fontset))
2023 break;
2026 return tables[0];
2030 DEFUN ("fontset-font", Ffontset_font, Sfontset_font, 2, 3, 0,
2031 doc: /* Return a font name pattern for character CH in fontset NAME.
2032 If NAME is t, find a pattern in the default fontset.
2033 If NAME is nil, find a pattern in the fontset of the selected frame.
2035 The value has the form (FAMILY . REGISTRY), where FAMILY is a font
2036 family name and REGISTRY is a font registry name. This is actually
2037 the first font name pattern for CH in the fontset or in the default
2038 fontset.
2040 If the 2nd optional arg ALL is non-nil, return a list of all font name
2041 patterns. */)
2042 (Lisp_Object name, Lisp_Object ch, Lisp_Object all)
2044 int c;
2045 Lisp_Object fontset, elt, list, repertory, val;
2046 int i, j;
2047 Lisp_Object frame;
2049 frame = Qnil;
2050 fontset = check_fontset_name (name, &frame);
2052 CHECK_CHARACTER (ch);
2053 c = XINT (ch);
2054 list = Qnil;
2055 while (1)
2057 for (i = 0, elt = FONTSET_REF (fontset, c); i < 2;
2058 i++, elt = FONTSET_FALLBACK (fontset))
2059 if (VECTORP (elt))
2060 for (j = 0; j < ASIZE (elt); j++)
2062 Lisp_Object family, registry;
2064 val = AREF (elt, j);
2065 if (NILP (val))
2066 return Qnil;
2067 repertory = AREF (val, 1);
2068 if (INTEGERP (repertory))
2070 struct charset *charset = CHARSET_FROM_ID (XINT (repertory));
2072 if (! CHAR_CHARSET_P (c, charset))
2073 continue;
2075 else if (CHAR_TABLE_P (repertory))
2077 if (NILP (CHAR_TABLE_REF (repertory, c)))
2078 continue;
2080 val = AREF (val, 0);
2081 /* VAL is a FONT-SPEC */
2082 family = AREF (val, FONT_FAMILY_INDEX);
2083 if (! NILP (family))
2084 family = SYMBOL_NAME (family);
2085 registry = AREF (val, FONT_REGISTRY_INDEX);
2086 if (! NILP (registry))
2087 registry = SYMBOL_NAME (registry);
2088 val = Fcons (family, registry);
2089 if (NILP (all))
2090 return val;
2091 list = Fcons (val, list);
2093 if (EQ (fontset, Vdefault_fontset))
2094 break;
2095 fontset = Vdefault_fontset;
2097 return (Fnreverse (list));
2100 DEFUN ("fontset-list", Ffontset_list, Sfontset_list, 0, 0, 0,
2101 doc: /* Return a list of all defined fontset names. */)
2102 (void)
2104 Lisp_Object fontset, list;
2105 int i;
2107 list = Qnil;
2108 for (i = 0; i < ASIZE (Vfontset_table); i++)
2110 fontset = FONTSET_FROM_ID (i);
2111 if (!NILP (fontset)
2112 && BASE_FONTSET_P (fontset))
2113 list = Fcons (FONTSET_NAME (fontset), list);
2116 return list;
2120 #ifdef ENABLE_CHECKING
2122 Lisp_Object dump_fontset (Lisp_Object) EXTERNALLY_VISIBLE;
2124 Lisp_Object
2125 dump_fontset (Lisp_Object fontset)
2127 Lisp_Object vec;
2129 vec = Fmake_vector (make_number (3), Qnil);
2130 ASET (vec, 0, FONTSET_ID (fontset));
2132 if (BASE_FONTSET_P (fontset))
2134 ASET (vec, 1, FONTSET_NAME (fontset));
2136 else
2138 Lisp_Object frame;
2140 frame = FONTSET_FRAME (fontset);
2141 if (FRAMEP (frame))
2143 FRAME_PTR f = XFRAME (frame);
2145 if (FRAME_LIVE_P (f))
2146 ASET (vec, 1,
2147 Fcons (FONTSET_NAME (FONTSET_BASE (fontset)),
2148 f->name));
2149 else
2150 ASET (vec, 1,
2151 Fcons (FONTSET_NAME (FONTSET_BASE (fontset)), Qnil));
2153 if (!NILP (FONTSET_DEFAULT (fontset)))
2154 ASET (vec, 2, FONTSET_ID (FONTSET_DEFAULT (fontset)));
2156 return vec;
2159 DEFUN ("fontset-list-all", Ffontset_list_all, Sfontset_list_all, 0, 0, 0,
2160 doc: /* Return a brief summary of all fontsets for debug use. */)
2161 (void)
2163 Lisp_Object val;
2164 int i;
2166 for (i = 0, val = Qnil; i < ASIZE (Vfontset_table); i++)
2167 if (! NILP (AREF (Vfontset_table, i)))
2168 val = Fcons (dump_fontset (AREF (Vfontset_table, i)), val);
2169 return (Fnreverse (val));
2171 #endif /* ENABLE_CHECKING */
2173 void
2174 syms_of_fontset (void)
2176 DEFSYM (Qfontset, "fontset");
2177 Fput (Qfontset, Qchar_table_extra_slots, make_number (9));
2178 DEFSYM (Qfontset_info, "fontset-info");
2179 Fput (Qfontset_info, Qchar_table_extra_slots, make_number (1));
2181 DEFSYM (Qprepend, "prepend");
2182 DEFSYM (Qappend, "append");
2183 DEFSYM (Qlatin, "latin");
2185 Vcached_fontset_data = Qnil;
2186 staticpro (&Vcached_fontset_data);
2188 Vfontset_table = Fmake_vector (make_number (32), Qnil);
2189 staticpro (&Vfontset_table);
2191 Vdefault_fontset = Fmake_char_table (Qfontset, Qnil);
2192 staticpro (&Vdefault_fontset);
2193 set_fontset_id (Vdefault_fontset, make_number (0));
2194 set_fontset_name
2195 (Vdefault_fontset,
2196 build_pure_c_string ("-*-*-*-*-*-*-*-*-*-*-*-*-fontset-default"));
2197 ASET (Vfontset_table, 0, Vdefault_fontset);
2198 next_fontset_id = 1;
2200 auto_fontset_alist = Qnil;
2201 staticpro (&auto_fontset_alist);
2203 DEFVAR_LISP ("font-encoding-charset-alist", Vfont_encoding_charset_alist,
2204 doc: /*
2205 Alist of charsets vs the charsets to determine the preferred font encoding.
2206 Each element looks like (CHARSET . ENCODING-CHARSET),
2207 where ENCODING-CHARSET is a charset registered in the variable
2208 `font-encoding-alist' as ENCODING.
2210 When a text has a property `charset' and the value is CHARSET, a font
2211 whose encoding corresponds to ENCODING-CHARSET is preferred. */);
2212 Vfont_encoding_charset_alist = Qnil;
2214 DEFVAR_LISP ("use-default-ascent", Vuse_default_ascent,
2215 doc: /*
2216 Char table of characters whose ascent values should be ignored.
2217 If an entry for a character is non-nil, the ascent value of the glyph
2218 is assumed to be specified by _MULE_DEFAULT_ASCENT property of a font.
2220 This affects how a composite character which contains
2221 such a character is displayed on screen. */);
2222 Vuse_default_ascent = Qnil;
2224 DEFVAR_LISP ("ignore-relative-composition", Vignore_relative_composition,
2225 doc: /*
2226 Char table of characters which are not composed relatively.
2227 If an entry for a character is non-nil, a composition sequence
2228 which contains that character is displayed so that
2229 the glyph of that character is put without considering
2230 an ascent and descent value of a previous character. */);
2231 Vignore_relative_composition = Qnil;
2233 DEFVAR_LISP ("alternate-fontname-alist", Valternate_fontname_alist,
2234 doc: /* Alist of fontname vs list of the alternate fontnames.
2235 When a specified font name is not found, the corresponding
2236 alternate fontnames (if any) are tried instead. */);
2237 Valternate_fontname_alist = Qnil;
2239 DEFVAR_LISP ("fontset-alias-alist", Vfontset_alias_alist,
2240 doc: /* Alist of fontset names vs the aliases. */);
2241 Vfontset_alias_alist = Fcons (Fcons (FONTSET_NAME (Vdefault_fontset),
2242 build_pure_c_string ("fontset-default")),
2243 Qnil);
2245 DEFVAR_LISP ("vertical-centering-font-regexp",
2246 Vvertical_centering_font_regexp,
2247 doc: /* Regexp matching font names that require vertical centering on display.
2248 When a character is displayed with such fonts, the character is displayed
2249 at the vertical center of lines. */);
2250 Vvertical_centering_font_regexp = Qnil;
2252 DEFVAR_LISP ("otf-script-alist", Votf_script_alist,
2253 doc: /* Alist of OpenType script tags vs the corresponding script names. */);
2254 Votf_script_alist = Qnil;
2256 defsubr (&Squery_fontset);
2257 defsubr (&Snew_fontset);
2258 defsubr (&Sset_fontset_font);
2259 defsubr (&Sinternal_char_font);
2260 defsubr (&Sfontset_info);
2261 defsubr (&Sfontset_font);
2262 defsubr (&Sfontset_list);
2263 #ifdef ENABLE_CHECKING
2264 defsubr (&Sfontset_list_all);
2265 #endif