emacs / src / fontset.c

  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
/* Fontset handler.
   Copyright (C) 1995, 1997 Electrotechnical Laboratory, JAPAN.
   Licensed to the Free Software Foundation.

This file is part of GNU Emacs.

GNU Emacs is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.

GNU Emacs is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with GNU Emacs; see the file COPYING.  If not, write to
the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.  */

#include <config.h>
#if HAVE_ALLOCA_H
#include <alloca.h>
#endif /* HAVE_ALLOCA_H */ 
#include "lisp.h"
#include "charset.h"
#include "ccl.h"
#include "fontset.h"
#include "frame.h"

Lisp_Object Vglobal_fontset_alist;
Lisp_Object Vfont_encoding_alist;
Lisp_Object Vuse_default_ascent;
Lisp_Object Vignore_relative_composition;
Lisp_Object Valternate_fontname_alist;
Lisp_Object Vfontset_alias_alist;
Lisp_Object Vhighlight_wrong_size_font;
Lisp_Object Vclip_large_size_font;

/* Used as a temporary in macro FS_LOAD_FONT.  */
int font_idx_temp;

/* We had better have our own strcasecmp function because some system
   doesn't have it.  */
static char my_strcasetbl[256];

/* Compare two strings S0 and S1 while ignoring differences in case.
   Return 1 if they differ, else return 0.  */
static int
my_strcasecmp (s0, s1)
     unsigned char *s0, *s1;
{
  while (*s0)
    if (my_strcasetbl[*s0++] != my_strcasetbl[*s1++]) return 1;
  return (int) *s1;
}

/* The following six are window system dependent functions.  See
   the comments in src/fontset.h for more detail.  */

/* Return a pointer to struct font_info of font FONT_IDX of frame F.  */
struct font_info *(*get_font_info_func) P_ ((FRAME_PTR f, int font_idx));

/* Return a list of font names which matches PATTERN.  See the document of
   `x-list-fonts' for more detail.  */
Lisp_Object (*list_fonts_func) P_ ((Lisp_Object pattern, Lisp_Object face,
				    Lisp_Object frame, Lisp_Object width));

/* Load a font named NAME for frame F and return a pointer to the
   information of the loaded font.  If loading is failed, return 0.  */
struct font_info *(*load_font_func) P_ ((FRAME_PTR f, char *name, int));

/* Return a pointer to struct font_info of a font named NAME for frame F.  */
struct font_info *(*query_font_func) P_ ((FRAME_PTR f, char *name));

/* Additional function for setting fontset or changing fontset
   contents of frame F.  */
void (*set_frame_fontset_func) P_ ((FRAME_PTR f, Lisp_Object arg,
				    Lisp_Object oldval));

/* Check if any window system is used now.  */
void (*check_window_system_func) P_ ((void));

struct fontset_data *
alloc_fontset_data ()
{
  struct fontset_data *fontset_data
    = (struct fontset_data *) xmalloc (sizeof (struct fontset_data));

  bzero (fontset_data, sizeof (struct fontset_data));

  return fontset_data;
}

void
free_fontset_data (fontset_data)
     struct fontset_data *fontset_data;
{
  if (fontset_data->fontset_table)
    {
      int i;

      for (i = 0; i < fontset_data->n_fontsets; i++)
	{
	  int j;
	  
	  xfree (fontset_data->fontset_table[i]->name);
	  for (j = 0; j <= MAX_CHARSET; j++)
	    if (fontset_data->fontset_table[i]->fontname[j])
	      xfree (fontset_data->fontset_table[i]->fontname[j]);
	  xfree (fontset_data->fontset_table[i]);
	}
      xfree (fontset_data->fontset_table);
    }

  xfree (fontset_data);
}

/* Load a font named FONTNAME for displaying CHARSET on frame F.
   All fonts for frame F is stored in a table pointed by FONT_TABLE.
   Return a pointer to the struct font_info of the loaded font.
   If loading fails, return 0;
   If FONTNAME is NULL, the name is taken from the information of FONTSET.
   If FONTSET is given, try to load a font whose size matches that of
   FONTSET, and, the font index is stored in the table for FONTSET.

   If you give FONTSET argument, don't call this function directry,
   instead call macro FS_LOAD_FONT with the same argument.  */

struct font_info *
fs_load_font (f, font_table, charset, fontname, fontset)
     FRAME_PTR f;
     struct font_info *font_table;
     int charset, fontset;
     char *fontname;
{
  Lisp_Object font_list;
  Lisp_Object list, elt;
  int font_idx;
  int size = 0;
  struct fontset_info *fontsetp = 0;
  struct font_info *fontp;

  if (fontset >= 0 && fontset < FRAME_FONTSET_DATA (f)->n_fontsets)
    {
      fontsetp = FRAME_FONTSET_DATA (f)->fontset_table[fontset];
      font_idx = fontsetp->font_indexes[charset];
      if (font_idx >= 0)
	/* We have already loaded a font.  */
	return font_table + font_idx;
      else if (font_idx == FONT_NOT_FOUND)
	/* We have already tried loading a font and failed.  */
	return 0;
      if (!fontname)
	fontname = fontsetp->fontname[charset];
    }

  if (!fontname)
    /* No way to get fontname.  */
    return 0;

  /* If CHARSET is not ASCII and FONTSET is specified, we must load a
     font of appropriate size to be used with other fonts in this
     fontset.  */
  if (charset != CHARSET_ASCII && fontsetp)
    {
      /* If we have not yet loaded ASCII font of FONTSET, we must load
	 it now to decided the size and height of this fontset.  */
      if (fontsetp->size == 0)
	{
	  fontp = fs_load_font (f, font_table, CHARSET_ASCII, 0, fontset);
	  if (!fontp)
	    /* Any fontset should contain avairable ASCII.  */
	    return 0;
	}
      /* Now we have surely decided the size of this fontset.  */
      size = fontsetp->size * CHARSET_WIDTH (charset);
    }

  fontp = (*load_font_func) (f, fontname, size);

  if (!fontp)
    {
      if (fontsetp)
	fontsetp->font_indexes[charset] = FONT_NOT_FOUND;
      return 0;
    }

  /* Fill in fields (CHARSET, ENCODING, and FONT_ENCODER) which are
     not set by (*load_font_func).  */
  fontp->charset = charset;

  if (fontp->encoding[1] != FONT_ENCODING_NOT_DECIDED)
    {
      /* The font itself tells which code points to be used.  Use this
	 encoding for all other charsets.  */
      int i;

      fontp->encoding[0] = fontp->encoding[1];
      for (i = MIN_CHARSET_OFFICIAL_DIMENSION1; i <= MAX_CHARSET; i++)
	fontp->encoding[i] = fontp->encoding[1];
    }
  else
    {
      /* The font itself doesn't tell which code points to be used.  */
      int i;

      /* At first, set 1 (means 0xA0..0xFF) as the default.  */
      fontp->encoding[0] = 1;
      for (i = MIN_CHARSET_OFFICIAL_DIMENSION1; i <= MAX_CHARSET; i++)
	fontp->encoding[i] = 1;
      /* Then override them by a specification in Vfont_encoding_alist.  */
      for (list = Vfont_encoding_alist; CONSP (list); list = XCONS (list)->cdr)
	{
	  elt = XCONS (list)->car;
	  if (CONSP (elt)
	      && STRINGP (XCONS (elt)->car) && CONSP (XCONS (elt)->cdr)
	      && (fast_c_string_match_ignore_case (XCONS (elt)->car, fontname)
		  >= 0))
	    {
	      Lisp_Object tmp;

	      for (tmp = XCONS (elt)->cdr; CONSP (tmp); tmp = XCONS (tmp)->cdr)
		if (CONSP (XCONS (tmp)->car)
		    && ((i = get_charset_id (XCONS (XCONS (tmp)->car)->car))
			>= 0)
		    && INTEGERP (XCONS (XCONS (tmp)->car)->cdr)
		    && XFASTINT (XCONS (XCONS (tmp)->car)->cdr) < 4)
		  fontp->encoding[i]
		    = XFASTINT (XCONS (XCONS (tmp)->car)->cdr);
	    }
	}
    }

  fontp->font_encoder = (struct ccl_program *) 0;
  for (list = Vfont_ccl_encoder_alist; CONSP (list); list = XCONS (list)->cdr)
    {
      elt = XCONS (list)->car;
      if (CONSP (elt)
	  && STRINGP (XCONS (elt)->car) && VECTORP (XCONS (elt)->cdr)
	  && fast_c_string_match_ignore_case (XCONS (elt)->car, fontname) >= 0)
	{
	  fontp->font_encoder
	    = (struct ccl_program *) xmalloc (sizeof (struct ccl_program));
	  setup_ccl_program (fontp->font_encoder, XCONS (elt)->cdr);
	  break;
	}
    }

  /* If FONTSET is specified, setup various fields of it.  */
  if (fontsetp)
    {
      fontsetp->font_indexes[charset] = fontp->font_idx;
      if (charset == CHARSET_ASCII)
	{
	  /* Decide or change the size and height of this fontset.  */
	  if (fontsetp->size == 0)
	    {
	      fontsetp->size = fontp->size;
	      fontsetp->height = fontp->height;
	    }
	  else if (fontsetp->size != fontp->size
		   || fontsetp->height != fontp->height)
	    {
	      /* When loading ASCII font of the different size from
		 the size of FONTSET, we have to update the size of
		 FONTSET.  Since changing the size of FONTSET may make
		 some fonts already loaded inappropriate to be used in
		 FONTSET, we must delete the record of such fonts.  In
		 that case, we also have to calculate the height of
		 FONTSET from the remaining fonts.  */
	      int i;

	      fontsetp->size = fontp->size;
	      fontsetp->height = fontp->height;
	      for (i = CHARSET_ASCII + 1; i <= MAX_CHARSET; i++)
		{
		  font_idx = fontsetp->font_indexes[i];
		  if (font_idx >= 0)
		    {
		      struct font_info *fontp2 = font_table + font_idx;

		      if (fontp2->size != fontp->size * CHARSET_WIDTH (i))
			fontsetp->font_indexes[i] = FONT_NOT_OPENED;
		      /* The following code should be disabled until
			 Emacs supports variable height lines.  */
#if 0
		      else if (fontsetp->height < fontp->height)
			fontsetp->height = fontp->height;
#endif
		    }
		}
	    }
	}
    }

  return fontp;
}

/* Return ID of the fontset named NAME on frame F.  */

int
fs_query_fontset (f, name)
     FRAME_PTR f;
     char *name;
{
  struct fontset_data *fontset_data = FRAME_FONTSET_DATA (f);
  int i;

  for (i = 0; i < fontset_data->n_fontsets; i++)
    if (!my_strcasecmp(name, fontset_data->fontset_table[i]->name))
      return i;
  return -1;
}

/* Register a fontset specified by FONTSET_INFO for frame FRAME.
   Return the fontset ID if successfully registered, else return -1.
   FONTSET_INFO is a cons of name of the fontset and FONTLIST, where
   FONTLIST is an alist of charsets vs fontnames.  */

int
fs_register_fontset (f, fontset_info)
     FRAME_PTR f;
     Lisp_Object fontset_info;
{
  struct fontset_data *fontset_data = FRAME_FONTSET_DATA (f);
  Lisp_Object name, fontlist;
  int fontset;
  struct fontset_info *fontsetp;
  int i;

  if (!CONSP (fontset_info)
      || !STRINGP (XCONS (fontset_info)->car)
      || !CONSP (XCONS (fontset_info)->cdr))
    /* Invalid data in FONTSET_INFO.  */
    return -1;

  name = XCONS (fontset_info)->car;
  if ((fontset = fs_query_fontset (f, XSTRING (name)->data)) >= 0)
    /* This fontset already exists on frame F.  */
    return fontset;

  fontsetp = (struct fontset_info *) xmalloc (sizeof (struct fontset_info));

  fontsetp->name = (char *) xmalloc (XSTRING (name)->size + 1);
  bcopy(XSTRING (name)->data, fontsetp->name, XSTRING (name)->size + 1);

  fontsetp->size = fontsetp->height = 0;

  for (i = 0; i <= MAX_CHARSET; i++)
    {
      fontsetp->fontname[i] = (char *) 0;
      fontsetp->font_indexes[i] = FONT_NOT_OPENED;
    }

  for (fontlist = XCONS (fontset_info)->cdr; CONSP (fontlist);
       fontlist = XCONS (fontlist)->cdr)
    {
      Lisp_Object tem = Fcar (fontlist);
      int charset;

      if (CONSP (tem)
	  && (charset = get_charset_id (XCONS (tem)->car)) >= 0
	  && STRINGP (XCONS (tem)->cdr))
	{
	  fontsetp->fontname[charset]
	     = (char *) xmalloc (XSTRING (XCONS (tem)->cdr)->size + 1);
	  bcopy (XSTRING (XCONS (tem)->cdr)->data,
		 fontsetp->fontname[charset],
		 XSTRING (XCONS (tem)->cdr)->size + 1);
	}
      else
	/* Broken or invalid data structure.  */
	return -1;
    }

  /* Do we need to create the table?  */
  if (fontset_data->fontset_table_size == 0)
    {
      fontset_data->fontset_table_size = 8;
      fontset_data->fontset_table
	= (struct fontset_info **) xmalloc (fontset_data->fontset_table_size
					    * sizeof (struct fontset_info *));
    }
  /* Do we need to grow the table?  */
  else if (fontset_data->n_fontsets >= fontset_data->fontset_table_size)
    {
      fontset_data->fontset_table_size += 8;
      fontset_data->fontset_table
	= (struct fontset_info **) xrealloc (fontset_data->fontset_table,
					     fontset_data->fontset_table_size
					     * sizeof (struct fontset_info *));
    }
  fontset = fontset_data->n_fontsets++;
  fontset_data->fontset_table[fontset] = fontsetp;

  return fontset;
}

/* Cache data used by fontset_pattern_regexp.  The car part is a
   pattern string containing at least one wild card, the cdr part is
   the corresponding regular expression.  */
static Lisp_Object Vcached_fontset_data;

#define CACHED_FONTSET_NAME (XSTRING (XCONS (Vcached_fontset_data)->car)->data)
#define CACHED_FONTSET_REGEX (XCONS (Vcached_fontset_data)->cdr)

/* If fontset name PATTERN contains any wild card, return regular
   expression corresponding to PATTERN.  */

Lisp_Object
fontset_pattern_regexp (pattern)
     Lisp_Object pattern;
{
  if (!index (XSTRING (pattern)->data, '*')
      && !index (XSTRING (pattern)->data, '?'))
    /* PATTERN does not contain any wild cards.  */
    return Qnil;

  if (!CONSP (Vcached_fontset_data)
      || strcmp (XSTRING (pattern)->data, CACHED_FONTSET_NAME))
    {
      /* We must at first update the cached data.  */
      char *regex = (char *) alloca (XSTRING (pattern)->size * 2);
      char *p0, *p1 = regex;

      /* Convert "*" to ".*", "?" to ".".  */
      *p1++ = '^';
      for (p0 = (char *) XSTRING (pattern)->data; *p0; p0++)
	{
	  if (*p0 == '*')
	    {
	      *p1++ = '.';
	      *p1++ = '*';
	    }
	  else if (*p0 == '?')
	    *p1++ == '.';
	  else
	    *p1++ = *p0;
	}
      *p1++ = '$';
      *p1++ = 0;

      Vcached_fontset_data = Fcons (build_string (XSTRING (pattern)->data),
				    build_string (regex));
    }

  return CACHED_FONTSET_REGEX;
}

DEFUN ("query-fontset", Fquery_fontset, Squery_fontset, 1, 1, 0,
  "Return a fontset name which matches PATTERN, nil if no matching fontset.\n\
PATTERN can contain `*' or `?' as a wild card\n\
just like X's font name matching algorithm allows.")
  (pattern)
     Lisp_Object pattern;
{
  Lisp_Object regexp, tem;

  (*check_window_system_func) ();

  CHECK_STRING (pattern, 0);

  if (XSTRING (pattern)->size == 0)
    return Qnil;

  tem = Frassoc (pattern, Vfontset_alias_alist);
  if (!NILP (tem))
    return Fcar (tem);

  regexp = fontset_pattern_regexp (pattern);

  for (tem = Vglobal_fontset_alist; CONSP (tem); tem = XCONS (tem)->cdr)
    {
      Lisp_Object fontset_name = XCONS (XCONS (tem)->car)->car;
      if (!NILP (regexp))
	{
	  if (fast_c_string_match_ignore_case (regexp,
					       XSTRING (fontset_name)->data)
	      >= 0)
	    return fontset_name;
	}
      else
	{
	  if (!my_strcasecmp (XSTRING (pattern)->data,
			      XSTRING (fontset_name)->data))
	    return fontset_name;
	}
    }

  return Qnil;
}

Lisp_Object Fframe_char_width ();

/* Return a list of names of available fontsets matching PATTERN on
   frame F.  If SIZE is not 0, it is the size (maximum bound width) of
   fontsets to be listed. */

Lisp_Object
list_fontsets (f, pattern, size)
     FRAME_PTR f;
     Lisp_Object pattern;
     int size;
{
  int i;
  Lisp_Object regexp, val;

  regexp = fontset_pattern_regexp (pattern);

  val = Qnil;
  for (i = 0; i < FRAME_FONTSET_DATA (f)->n_fontsets; i++)
    {
      struct fontset_info *fontsetp = FRAME_FONTSET_DATA (f)->fontset_table[i];
      int name_matched = 0;
      int size_matched = 0;

      if (!NILP (regexp))
	{
	  if (fast_c_string_match_ignore_case (regexp, fontsetp->name) >= 0)
	    name_matched = 1;
	}
      else
	{
	  if (!my_strcasecmp (XSTRING (pattern)->data, fontsetp->name))
	    name_matched = 1;	  
	}

      if (name_matched)
	{
	  if (!size || fontsetp->size == size)
	    size_matched = 1;
	  else if (fontsetp->size == 0)
	    {
	      /* No font of this fontset has loaded yet.  Try loading
		 one with SIZE.  */
	      int j;

	      for (j = 0; j <= MAX_CHARSET; j++)
		if (fontsetp->fontname[j])
		  {
		    if ((*load_font_func) (f, fontsetp->fontname[j], size))
		      size_matched = 1;
		    break;
		  }
	    }

	  if (size_matched)
	    val = Fcons (build_string (fontsetp->name), val);
	}
    }

  return val;
}

DEFUN ("new-fontset", Fnew_fontset, Snew_fontset, 2, 2, 0,
  "Create a new fontset NAME which contains fonts in FONTLIST.\n\
FONTLIST is an alist of charsets vs corresponding font names.")
  (name, fontlist)
     Lisp_Object name, fontlist;
{
  Lisp_Object fullname, fontset_info;
  Lisp_Object tail;

  (*check_window_system_func) ();

  CHECK_STRING (name, 0);
  CHECK_LIST (fontlist, 1);

  fullname = Fquery_fontset (name);
  if (!NILP (fullname))
    error ("Fontset \"%s\" matches the existing fontset \"%s\"",
	   XSTRING (name)->data, XSTRING (fullname)->data);

  /* Check the validity of FONTLIST.  */
  for (tail = fontlist; CONSP (tail); tail = XCONS (tail)->cdr)
    {
      Lisp_Object tem = XCONS (tail)->car;
      int charset;

      if (!CONSP (tem)
	  || (charset = get_charset_id (XCONS (tem)->car)) < 0
	  || !STRINGP (XCONS (tem)->cdr))
	error ("Elements of fontlist must be a cons of charset and font name");
    }

  fontset_info = Fcons (name, fontlist);
  Vglobal_fontset_alist  = Fcons (fontset_info, Vglobal_fontset_alist);

  /* Register this fontset for all existing frames.  */
  {
    Lisp_Object framelist, frame;
    
    FOR_EACH_FRAME (framelist, frame)
      if (!FRAME_TERMCAP_P (XFRAME (frame)))
	fs_register_fontset (XFRAME (frame), fontset_info);
  }

  return Qnil;
}

extern Lisp_Object Fframe_parameters ();
extern Lisp_Object Qfont;
Lisp_Object Qfontset;

DEFUN ("set-fontset-font", Fset_fontset_font, Sset_fontset_font, 3, 4, 0,
  "Set FONTNAME for a font of CHARSET in fontset NAME on frame FRAME.\n\
If FRAME is omitted or nil, all frames are affected.")
  (name, charset_symbol, fontname, frame)
     Lisp_Object name, charset_symbol, fontname, frame;
{
  int charset;
  Lisp_Object fullname, fontlist;

  (*check_window_system_func) ();

  CHECK_STRING (name, 0);
  CHECK_SYMBOL (charset_symbol, 1);
  CHECK_STRING (fontname, 2);
  if (!NILP (frame))
    CHECK_LIVE_FRAME (frame, 3);

  if ((charset = get_charset_id (charset_symbol)) < 0)
    error ("Invalid charset: %s", XSYMBOL (charset_symbol)->name->data);

  fullname = Fquery_fontset (name);
  if (NILP (fullname))
    error ("Fontset \"%s\" does not exist", XSTRING (name)->data);

  /* If FRAME is not specified, we must, at first, update contents of
     `global-fontset-alist' for a frame created in the future.  */
  if (NILP (frame))
    {
      Lisp_Object fontset_info = Fassoc (fullname, Vglobal_fontset_alist);
      Lisp_Object tem = Fassq (charset_symbol, XCONS (fontset_info)->cdr);

      if (NILP (tem))
	XCONS (fontset_info)->cdr
	  = Fcons (Fcons (charset_symbol, fontname),
		   XCONS (fontset_info)->cdr);
      else
	XCONS (tem)->cdr = fontname;
    }

  /* Then, update information in the specified frame or all existing
     frames.  */
  {
    Lisp_Object framelist, tem;

    FOR_EACH_FRAME (framelist, tem)
      if (!FRAME_TERMCAP_P (XFRAME (tem))
	  && (NILP (frame) || EQ (frame, tem)))
	{
	  FRAME_PTR f = XFRAME (tem);
	  int fontset = fs_query_fontset (f, XSTRING (fullname)->data);
	  struct fontset_info *fontsetp
	    = FRAME_FONTSET_DATA (f)->fontset_table[fontset];

	  if (fontsetp->fontname[charset])
	    xfree (fontsetp->fontname[charset]);
	  fontsetp->fontname[charset]
	    = (char *) xmalloc (XSTRING (fontname)->size + 1);
	  bcopy (XSTRING (fontname)->data, fontsetp->fontname[charset],
		 XSTRING (fontname)->size + 1);
	  fontsetp->font_indexes[charset] = FONT_NOT_OPENED;

	  if (charset == CHARSET_ASCII)
	    {
	      Lisp_Object font_param = Fassq (Qfont, Fframe_parameters (tem));

	      if (set_frame_fontset_func
		  && !NILP (font_param)
		  && !strcmp (XSTRING (fullname)->data,
			      XSTRING (XCONS (font_param)->cdr)->data))
		/* This fontset is the default fontset on frame TEM.
		   We may have to resize this frame because of new
		   ASCII font.  */
		(*set_frame_fontset_func) (f, fullname, Qnil);
	    }
	}
  }

  return Qnil;
}

DEFUN ("font-info", Ffont_info, Sfont_info, 1, 2, 0,
  "Return information about a font named NAME on frame FRAME.\n\
If FRAME is omitted or nil, use the selected frame.\n\
The returned value is a vector of OPENED-NAME, FULL-NAME, CHARSET, SIZE,\n\
  HEIGHT, BASELINE-OFFSET, RELATIVE-COMPOSE, and DEFAULT-ASCENT,\n\
where\n\
  OPENED-NAME is the name used for opening the font,\n\
  FULL-NAME is the full name of the font,\n\
  CHARSET is the charset displayed by the font,\n\
  SIZE is the minimum bound width of the font,\n\
  HEIGHT is the height of the font,\n\
  BASELINE-OFFSET is the upward offset pixels from ASCII baseline,\n\
  RELATIVE-COMPOSE and DEFAULT-ASCENT are the numbers controlling\n\
    how to compose characters.\n\
If the named font is not yet loaded, return nil.")
  (name, frame)
     Lisp_Object name, frame;
{
  FRAME_PTR f;
  struct font_info *fontp;
  Lisp_Object info;

  (*check_window_system_func) ();

  CHECK_STRING (name, 0);
  if (NILP (frame))
    f = selected_frame;
  else
    {
      CHECK_LIVE_FRAME (frame, 1);
      f = XFRAME (frame);
    }

  if (!query_font_func)
    error ("Font query function is not supported");

  fontp = (*query_font_func) (f, XSTRING (name)->data);
  if (!fontp)
    return Qnil;

  info = Fmake_vector (make_number (8), Qnil);

  XVECTOR (info)->contents[0] = build_string (fontp->name);
  XVECTOR (info)->contents[1] = build_string (fontp->full_name);
  XVECTOR (info)->contents[2] = CHARSET_SYMBOL (fontp->charset);
  XVECTOR (info)->contents[3] = make_number (fontp->size);
  XVECTOR (info)->contents[4] = make_number (fontp->height);
  XVECTOR (info)->contents[5] = make_number (fontp->baseline_offset);
  XVECTOR (info)->contents[6] = make_number (fontp->relative_compose);
  XVECTOR (info)->contents[7] = make_number (fontp->default_ascent);

  return info;
}

DEFUN ("fontset-info", Ffontset_info, Sfontset_info, 1, 2, 0,
  "Return information about a fontset named NAME on frame FRAME.\n\
If FRAME is omitted or nil, use the selected frame.\n\
The returned value is a vector of SIZE, HEIGHT, and FONT-LIST,\n\
where\n\
  SIZE is the minimum bound width of ASCII font of the fontset,\n\
  HEIGHT is the height of the tallest font in the fontset, and\n\
  FONT-LIST is an alist of the format:\n\
    (CHARSET REQUESTED-FONT-NAME LOADED-FONT-NAME).\n\
LOADED-FONT-NAME t means the font is not yet loaded, nil means the\n\
loading failed.")
  (name, frame)
     Lisp_Object name, frame;
{
  FRAME_PTR f;
  int fontset;
  struct fontset_info *fontsetp;
  Lisp_Object info, val;
  int i;
  
  (*check_window_system_func) ();

  CHECK_STRING(name, 0);
  if (NILP (frame))
    f = selected_frame;
  else
    {
      CHECK_LIVE_FRAME (frame, 1);
      f = XFRAME (frame);
    }

  fontset = fs_query_fontset (f, XSTRING (name)->data);
  if (fontset < 0)
    error ("Fontset \"%s\" does not exist", XSTRING (name)->data);

  info = Fmake_vector (make_number (3), Qnil);

  fontsetp = FRAME_FONTSET_DATA (f)->fontset_table[fontset];

  XVECTOR (info)->contents[0] = make_number (fontsetp->size);
  XVECTOR (info)->contents[1] = make_number (fontsetp->height);
  val = Qnil;
  for (i = 0; i <= MAX_CHARSET; i++)
    if (fontsetp->fontname[i])
      {
	int font_idx = fontsetp->font_indexes[i];
	Lisp_Object loaded;

	if (font_idx == FONT_NOT_OPENED)
	  loaded = Qt;
	else if (font_idx == FONT_NOT_FOUND)
	  loaded = Qnil;
	else
	  loaded
	    = build_string ((*get_font_info_func) (f, font_idx)->full_name);
	val = Fcons (Fcons (CHARSET_SYMBOL (i),
			    Fcons (build_string (fontsetp->fontname[i]),
				   Fcons (loaded, Qnil))),
		     val);
      }
  XVECTOR (info)->contents[2] = val;
  return info;
}

syms_of_fontset ()
{
  int i;

  for (i = 0; i < 256; i++)
    my_strcasetbl[i] = (i >= 'A' && i <= 'Z') ? i + 'a' - 'A' : i;

  if (!load_font_func)
    /* Window system initializer should have set proper functions.  */
    abort ();

  Qfontset = intern ("fontset");
  staticpro (&Qfontset);

  Vcached_fontset_data = Qnil;
  staticpro (&Vcached_fontset_data);

  DEFVAR_LISP ("global-fontset-alist", &Vglobal_fontset_alist,
    "Internal data for fontset.  Not for external use.\n\
This is an alist associating fontset names with the lists of fonts\n\
 contained in them.\n\
Newly created frames make their own fontset database from here.");
  Vglobal_fontset_alist = Qnil;

  DEFVAR_LISP ("font-encoding-alist", &Vfont_encoding_alist,
    "Alist of fontname patterns vs corresponding encoding info.\n\
Each element looks like (REGEXP . ENCODING-INFO),\n\
 where ENCODING-INFO is an alist of CHARSET vs ENCODING.\n\
ENCODING is one of the following integer values:\n\
	0: code points 0x20..0x7F or 0x2020..0x7F7F are used,\n\
	1: code points 0xA0..0xFF or 0xA0A0..0xFFFF are used,\n\
	2: code points 0x20A0..0x7FFF are used,\n\
	3: code points 0xA020..0xFF7F are used.");
  Vfont_encoding_alist = Qnil;

  DEFVAR_LISP ("use-default-ascent", &Vuse_default_ascent,
     "Char table of characters whose ascent values should be ignored.\n\
If an entry for a character is non-nil, the ascent value of the glyph\n\
is assumed to be what specified by _MULE_DEFAULT_ASCENT property of a font.\n\
\n\
This affects how a composite character which contains\n\
such a character is displayed on screen.");
  Vuse_default_ascent = Qnil;

  DEFVAR_LISP ("ignore-relative-composition", &Vignore_relative_composition,
     "Char table of characters which is not composed relatively.\n\
If an entry for a character is non-nil, a composite character\n\
which contains that character is displayed so that\n\
the glyph of that character is put without considering\n\
an ascent and descent value of a previous character.");
  Vuse_default_ascent = Qnil;

  DEFVAR_LISP ("alternate-fontname-alist", &Valternate_fontname_alist,
     "Alist of fontname vs list of the alternate fontnames.\n\
When a specified font name is not found, the corresponding\n\
alternate fontnames (if any) are tried instead.");
  Valternate_fontname_alist = Qnil;

  DEFVAR_LISP ("fontset-alias-alist", &Vfontset_alias_alist,
     "Alist of fontset names vs the aliases.");
  Vfontset_alias_alist = Qnil;

  DEFVAR_LISP ("highlight-wrong-size-font", &Vhighlight_wrong_size_font,
     "*Non-nil means highlight characters shown in wrong size fonts somehow.\n\
The way to highlight them depends on window system on which Emacs runs.\n\
On X11, a rectangle is shown around each such character.");
  Vhighlight_wrong_size_font = Qnil;

  DEFVAR_LISP ("clip-large-size-font", &Vclip_large_size_font,
     "*Non-nil means characters shown in overlarge fonts are clipped.\n\
The height of clipping area is the same as that of an ASCII character.\n\
The width of the area is the same as that of an ASCII character,\n\
or twice as wide, depending on the character set's column-width.\n\
\n\
If the only font you have for a specific character set is too large,\n\
and clipping these characters makes them hard to read,\n\
you can set this variable to nil to display the characters without clipping.\n\
The drawback is that you will get some garbage left on your screen.");
  Vclip_large_size_font = Qt;

  defsubr (&Squery_fontset);
  defsubr (&Snew_fontset);
  defsubr (&Sset_fontset_font);
  defsubr (&Sfont_info);
  defsubr (&Sfontset_info);
}
Tip: Filter by directory path e.g. /media app.js to search for public/media/app.js.
Tip: Use camelCasing e.g. ProjME to search for ProjectModifiedEvent.java.
Tip: Filter by extension type e.g. /repo .js to search for all .js files in the /repo directory.
Tip: Separate your search with spaces e.g. /ssh pom.xml to search for src/ssh/pom.xml.
Tip: Use ↑ and ↓ arrow keys to navigate and return to view the file.
Tip: You can also navigate files with Ctrl+j (next) and Ctrl+k (previous) and view the file with Ctrl+o.
Tip: You can also navigate files with Alt+j (next) and Alt+k (previous) and view the file with Alt+o.