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cb637678 | 1 | /* "Face" primitives. |
7b7739b1 JB |
2 | Copyright (C) 1992, 1993 Free Software Foundation. |
3 | ||
c115973b JB |
4 | This file is part of GNU Emacs. |
5 | ||
6 | GNU Emacs is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
7b7739b1 | 8 | the Free Software Foundation; either version 2, or (at your option) |
c115973b JB |
9 | any later version. |
10 | ||
11 | GNU Emacs is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with GNU Emacs; see the file COPYING. If not, write to | |
18 | the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
19 | ||
357f32fc | 20 | /* This is derived from work by Lucid (some parts very loosely so). */ |
7b7739b1 | 21 | |
c115973b JB |
22 | #include <sys/types.h> |
23 | #include <sys/stat.h> | |
24 | ||
25 | #include "config.h" | |
26 | #include "lisp.h" | |
27 | ||
cb637678 JB |
28 | #ifdef HAVE_X_WINDOWS |
29 | ||
c115973b JB |
30 | #include "xterm.h" |
31 | #include "buffer.h" | |
f211082d | 32 | #include "dispextern.h" |
7b7739b1 | 33 | #include "frame.h" |
357f32fc | 34 | #include "blockinput.h" |
b6d40e46 | 35 | #include "window.h" |
c115973b JB |
36 | |
37 | /* Display Context for the icons */ | |
38 | #include <X11/Intrinsic.h> | |
39 | #include <X11/StringDefs.h> | |
3dbae1e4 | 40 | /* #include <X11/Xmu/Drawing.h> */ /* Appears not to be used */ |
c115973b JB |
41 | #include <X11/Xos.h> |
42 | ||
cb637678 JB |
43 | \f |
44 | /* An explanation of the face data structures. */ | |
45 | ||
46 | /* ========================= Face Data Structures ========================= | |
47 | ||
48 | All lisp code uses symbols as face names. | |
49 | ||
50 | Each frame has a face_alist member (with the frame-face-alist and | |
51 | set-frame-face-alist accessors), associating the face names with | |
52 | vectors of the form | |
53 | [face NAME ID FONT FOREGROUND BACKGROUND BACKGROUND-PIXMAP UNDERLINE-P] | |
54 | where | |
55 | face is the symbol `face', | |
56 | NAME is the symbol with which this vector is associated (a backpointer), | |
57 | ID is the face ID, an integer used internally by the C code to identify | |
58 | the face, | |
59 | FONT, FOREGROUND, and BACKGROUND are strings naming the fonts and colors | |
60 | to use with the face, | |
61 | BACKGROUND-PIXMAP is the name of an x bitmap filename, which we don't | |
62 | use right now, and | |
63 | UNDERLINE-P is non-nil if the face should be underlined. | |
64 | (lisp/faces.el maintains these association lists.) | |
65 | ||
66 | The frames' private alists hold the frame-local definitions for the | |
67 | faces. The lisp variable global-face-data contains the global | |
68 | defaults for faces. (See lisp/faces.el for this too.) | |
69 | ||
70 | In the C code, we also have a `struct face' with the elements | |
71 | `foreground', `background', `font', and `underline', | |
72 | which specify its visual appearance, and elements | |
73 | `gc' and `cached_index'; | |
74 | `gc' may be an X GC which has been built for the given display | |
75 | parameters. Faces with GC's are called `display faces'. Whether | |
76 | or not a face has a GC depends on what data structure the face is | |
77 | in; we explain these more below. (See src/dispextern.h.) | |
78 | ||
79 | Each frame also has members called `faces' and `n_faces' (with the | |
80 | accessors FRAME_FACES and FRAME_N_FACES), which define an array of | |
81 | struct face pointers, indexed by face ID (element 2 of the | |
82 | vector). These are called "frame faces". | |
83 | Element 0 is the default face --- the one used for normal text. | |
84 | Element 1 is the modeline face. | |
85 | These faces have their GC's set; the rest do not. (See src/xterm.h.) | |
86 | ||
87 | The global variables `face_vector' and `nfaces' define another | |
88 | array of struct face pointers, with their GC's set. This array | |
89 | acts as a cache of GC's to be used by all frames. The function | |
90 | `intern_face', passed a struct face *, searches face_vector for a | |
91 | struct face with the same parameters, adds a new one with a GC if | |
92 | it doesn't find one, and returns it. If you have a `struct face', | |
93 | and you want a GC for it, call intern_face on that struct, and it | |
94 | will return a `struct face *' with its GC set. The faces in | |
95 | face_vector are called `cached faces.' (See src/xfaces.c.) | |
96 | ||
97 | The `GLYPH' data type is an unsigned integer type; the bottom byte | |
98 | is a character code, and the byte above that is a face id. The | |
99 | `struct frame_glyphs' structure, used to describe frames' current | |
100 | or desired contents, is essentially a matrix of GLYPHs; the face | |
101 | ID's in a struct frame_glyphs are indices into FRAME_FACES. (See | |
102 | src/dispextern.h.) | |
103 | ||
104 | Some subtleties: | |
7b7739b1 | 105 | |
cb637678 JB |
106 | Since face_vector is just a cache --- there are no pointers into it |
107 | from the rest of the code, and everyone accesses it through | |
108 | intern_face --- we could just free its GC's and throw the whole | |
109 | thing away without breaking anything. This gives us a simple way | |
110 | to garbage-collect old GC's nobody's using any more - we can just | |
111 | purge face_vector, and then let subsequent calls to intern_face | |
112 | refill it as needed. The function clear_face_vector performs this | |
113 | purge. | |
114 | ||
115 | We're often applying intern_face to faces in frames' local arrays - | |
116 | for example, we do this while sending GLYPHs from a struct | |
117 | frame_glyphs to X during redisplay. It would be nice to avoid | |
118 | searching all of face_vector every time we intern a frame's face. | |
119 | So, when intern_face finds a match for FACE in face_vector, it | |
120 | stores the index of the match in FACE's cached_index member, and | |
121 | checks there first next time. */ | |
122 | ||
123 | \f | |
124 | /* Definitions and declarations. */ | |
125 | ||
c115973b JB |
126 | /* A table of display faces. */ |
127 | struct face **face_vector; | |
128 | /* The length in use of the table. */ | |
129 | int nfaces; | |
130 | /* The allocated length of the table. */ | |
131 | int nfaces_allocated; | |
132 | ||
133 | /* The number of face-id's in use (same for all frames). */ | |
134 | int next_face_id; | |
135 | ||
bc0db68d RS |
136 | /* The number of the face to use to indicate the region. */ |
137 | int region_face; | |
138 | ||
7b7739b1 JB |
139 | #define FACE_DEFAULT (~0) |
140 | ||
f211082d JB |
141 | Lisp_Object Qface, Qwindow, Qpriority; |
142 | ||
c115973b | 143 | static void build_face (); |
f211082d | 144 | static Lisp_Object face_name_id_number (); |
cb637678 JB |
145 | |
146 | struct face *intern_face (); | |
147 | static void ensure_face_ready (); | |
c115973b | 148 | \f |
cb637678 JB |
149 | /* Allocating, copying, and comparing struct faces. */ |
150 | ||
151 | /* Allocate a new face */ | |
152 | static struct face * | |
153 | allocate_face () | |
154 | { | |
155 | struct face *result = (struct face *) xmalloc (sizeof (struct face)); | |
156 | bzero (result, sizeof (struct face)); | |
157 | result->font = (XFontStruct *) FACE_DEFAULT; | |
158 | result->foreground = FACE_DEFAULT; | |
159 | result->background = FACE_DEFAULT; | |
160 | result->stipple = FACE_DEFAULT; | |
161 | return result; | |
162 | } | |
c115973b | 163 | |
cb637678 | 164 | /* Make a new face that's a copy of an existing one. */ |
c115973b JB |
165 | static struct face * |
166 | copy_face (face) | |
167 | struct face *face; | |
168 | { | |
169 | struct face *result = allocate_face (); | |
170 | ||
171 | result->font = face->font; | |
172 | result->foreground = face->foreground; | |
173 | result->background = face->background; | |
f211082d | 174 | result->stipple = face->stipple; |
c115973b JB |
175 | result->underline = face->underline; |
176 | ||
177 | return result; | |
178 | } | |
179 | ||
180 | static int | |
181 | face_eql (face1, face2) | |
182 | struct face *face1, *face2; | |
183 | { | |
cb637678 | 184 | return ( face1->font == face2->font |
c115973b JB |
185 | && face1->foreground == face2->foreground |
186 | && face1->background == face2->background | |
cb637678 JB |
187 | && face1->stipple == face2->stipple |
188 | && face1->underline == face2->underline); | |
c115973b | 189 | } |
cb637678 JB |
190 | \f |
191 | /* Interning faces in the `face_vector' cache, and clearing that cache. */ | |
c115973b JB |
192 | |
193 | /* Return the unique display face corresponding to the user-level face FACE. | |
c115973b JB |
194 | If there isn't one, make one, and find a slot in the face_vector to |
195 | put it in. */ | |
c115973b | 196 | static struct face * |
7b7739b1 | 197 | get_cached_face (f, face) |
c115973b JB |
198 | struct frame *f; |
199 | struct face *face; | |
200 | { | |
201 | int i, empty = -1; | |
f211082d | 202 | struct face *result; |
c115973b | 203 | |
cb637678 JB |
204 | /* Perhaps FACE->cached_index is valid; this could happen if FACE is |
205 | in a frame's face list. */ | |
206 | if (face->cached_index >= 0 | |
207 | && face->cached_index < nfaces | |
208 | && face_eql (face_vector[face->cached_index], face)) | |
209 | return face_vector[face->cached_index]; | |
210 | ||
c115973b JB |
211 | /* Look for an existing display face that does the job. |
212 | Also find an empty slot if any. */ | |
213 | for (i = 0; i < nfaces; i++) | |
214 | { | |
215 | if (face_eql (face_vector[i], face)) | |
216 | return face_vector[i]; | |
217 | if (face_vector[i] == 0) | |
218 | empty = i; | |
219 | } | |
220 | ||
221 | /* If no empty slots, make one. */ | |
222 | if (empty < 0 && nfaces == nfaces_allocated) | |
223 | { | |
224 | int newsize = nfaces + 20; | |
225 | face_vector | |
226 | = (struct face **) xrealloc (face_vector, | |
227 | newsize * sizeof (struct face *)); | |
228 | nfaces_allocated = newsize; | |
229 | } | |
230 | ||
231 | if (empty < 0) | |
232 | empty = nfaces++; | |
233 | ||
234 | /* Put a new display face in the empty slot. */ | |
235 | result = copy_face (face); | |
236 | face_vector[empty] = result; | |
237 | ||
238 | /* Make a graphics context for it. */ | |
239 | build_face (f, result); | |
240 | ||
241 | return result; | |
242 | } | |
243 | ||
cb637678 JB |
244 | /* Given a frame face, return an equivalent display face |
245 | (one which has a graphics context). */ | |
246 | ||
247 | struct face * | |
248 | intern_face (f, face) | |
249 | struct frame *f; | |
250 | struct face *face; | |
251 | { | |
cb637678 JB |
252 | /* If it's equivalent to the default face, use that. */ |
253 | if (face_eql (face, FRAME_DEFAULT_FACE (f))) | |
254 | { | |
255 | if (!FRAME_DEFAULT_FACE (f)->gc) | |
256 | build_face (f, FRAME_DEFAULT_FACE (f)); | |
257 | return FRAME_DEFAULT_FACE (f); | |
258 | } | |
259 | ||
260 | /* If it's equivalent to the mode line face, use that. */ | |
261 | if (face_eql (face, FRAME_MODE_LINE_FACE (f))) | |
262 | { | |
263 | if (!FRAME_MODE_LINE_FACE (f)->gc) | |
264 | build_face (f, FRAME_MODE_LINE_FACE (f)); | |
265 | return FRAME_MODE_LINE_FACE (f); | |
266 | } | |
267 | ||
f6b98e0b JB |
268 | /* If it's not one of the frame's default faces, it shouldn't have a GC. */ |
269 | if (face->gc) | |
270 | abort (); | |
271 | ||
cb637678 JB |
272 | /* Get a specialized display face. */ |
273 | return get_cached_face (f, face); | |
274 | } | |
275 | ||
c115973b JB |
276 | /* Clear out face_vector and start anew. |
277 | This should be done from time to time just to avoid | |
278 | keeping too many graphics contexts in face_vector | |
279 | that are no longer needed. */ | |
280 | ||
281 | void | |
282 | clear_face_vector () | |
283 | { | |
284 | Lisp_Object rest; | |
285 | Display *dpy = x_current_display; | |
f211082d | 286 | int i; |
c115973b JB |
287 | |
288 | BLOCK_INPUT; | |
289 | /* Free the display faces in the face_vector. */ | |
290 | for (i = 0; i < nfaces; i++) | |
291 | { | |
292 | struct face *face = face_vector[i]; | |
f211082d JB |
293 | if (face->gc) |
294 | XFreeGC (dpy, face->gc); | |
c115973b JB |
295 | xfree (face); |
296 | } | |
297 | nfaces = 0; | |
298 | ||
299 | UNBLOCK_INPUT; | |
300 | } | |
301 | \f | |
cb637678 JB |
302 | /* Allocating and freeing X resources for display faces. */ |
303 | ||
f211082d JB |
304 | /* Make a graphics context for face FACE, which is on frame F, |
305 | if that can be done. */ | |
c115973b JB |
306 | static void |
307 | build_face (f, face) | |
cb637678 JB |
308 | struct frame *f; |
309 | struct face *face; | |
c115973b JB |
310 | { |
311 | GC gc; | |
312 | XGCValues xgcv; | |
313 | unsigned long mask; | |
314 | ||
f211082d JB |
315 | if (face->foreground != FACE_DEFAULT) |
316 | xgcv.foreground = face->foreground; | |
317 | else | |
318 | xgcv. foreground = f->display.x->foreground_pixel; | |
319 | if (face->background != FACE_DEFAULT) | |
320 | xgcv.background = face->background; | |
321 | else | |
322 | xgcv. background = f->display.x->background_pixel; | |
323 | if (face->font && (int) face->font != FACE_DEFAULT) | |
324 | xgcv.font = face->font->fid; | |
325 | else | |
326 | xgcv.font = f->display.x->font->fid; | |
c115973b JB |
327 | xgcv.graphics_exposures = 0; |
328 | mask = GCForeground | GCBackground | GCFont | GCGraphicsExposures; | |
329 | gc = XCreateGC (x_current_display, FRAME_X_WINDOW (f), | |
330 | mask, &xgcv); | |
331 | #if 0 | |
f211082d JB |
332 | if (face->stipple && face->stipple != FACE_DEFAULT) |
333 | XSetStipple (x_current_display, gc, face->stipple); | |
c115973b | 334 | #endif |
f211082d | 335 | face->gc = gc; |
c115973b | 336 | } |
cb637678 JB |
337 | |
338 | /* Allocating, freeing, and duplicating fonts, colors, and pixmaps. */ | |
339 | ||
340 | static XFontStruct * | |
341 | load_font (f, name) | |
342 | struct frame *f; | |
343 | Lisp_Object name; | |
344 | { | |
345 | XFontStruct *font; | |
346 | ||
347 | if (NILP (name)) | |
348 | return (XFontStruct *) FACE_DEFAULT; | |
349 | ||
350 | CHECK_STRING (name, 0); | |
351 | BLOCK_INPUT; | |
352 | font = XLoadQueryFont (x_current_display, (char *) XSTRING (name)->data); | |
353 | UNBLOCK_INPUT; | |
354 | ||
355 | if (! font) | |
356 | Fsignal (Qerror, Fcons (build_string ("undefined font"), | |
357 | Fcons (name, Qnil))); | |
358 | return font; | |
359 | } | |
360 | ||
361 | static void | |
362 | unload_font (f, font) | |
363 | struct frame *f; | |
364 | XFontStruct *font; | |
365 | { | |
366 | if (!font || font == ((XFontStruct *) FACE_DEFAULT)) | |
367 | return; | |
368 | XFreeFont (x_current_display, font); | |
369 | } | |
370 | ||
371 | static unsigned long | |
372 | load_color (f, name) | |
373 | struct frame *f; | |
374 | Lisp_Object name; | |
375 | { | |
376 | Display *dpy = x_current_display; | |
377 | Colormap cmap; | |
378 | XColor color; | |
379 | int result; | |
380 | ||
381 | if (NILP (name)) | |
382 | return FACE_DEFAULT; | |
383 | ||
384 | cmap = DefaultColormapOfScreen (DefaultScreenOfDisplay (x_current_display)); | |
385 | ||
386 | CHECK_STRING (name, 0); | |
387 | BLOCK_INPUT; | |
388 | result = XParseColor (dpy, cmap, (char *) XSTRING (name)->data, &color); | |
389 | UNBLOCK_INPUT; | |
390 | if (! result) | |
391 | Fsignal (Qerror, Fcons (build_string ("undefined color"), | |
392 | Fcons (name, Qnil))); | |
393 | BLOCK_INPUT; | |
394 | result = XAllocColor (dpy, cmap, &color); | |
395 | UNBLOCK_INPUT; | |
396 | if (! result) | |
397 | Fsignal (Qerror, Fcons (build_string ("X server cannot allocate color"), | |
398 | Fcons (name, Qnil))); | |
399 | return (unsigned long) color.pixel; | |
400 | } | |
401 | ||
402 | static void | |
403 | unload_color (f, pixel) | |
404 | struct frame *f; | |
405 | Pixel pixel; | |
406 | { | |
407 | Colormap cmap; | |
408 | Display *dpy = x_current_display; | |
409 | if (pixel == FACE_DEFAULT) | |
410 | return; | |
411 | cmap = DefaultColormapOfScreen (DefaultScreenOfDisplay (x_current_display)); | |
412 | BLOCK_INPUT; | |
413 | XFreeColors (dpy, cmap, &pixel, 1, 0); | |
414 | UNBLOCK_INPUT; | |
415 | } | |
416 | \f | |
417 | /* Initializing face arrays for frames. */ | |
418 | ||
419 | /* Set up faces 0 and 1 based on the normal text and modeline GC's. */ | |
420 | void | |
421 | init_frame_faces (f) | |
422 | struct frame *f; | |
423 | { | |
424 | ensure_face_ready (f, 0); | |
425 | { | |
426 | XGCValues gcv; | |
427 | struct face *face = FRAME_FACES (f) [0]; | |
428 | ||
429 | XGetGCValues (x_current_display, f->display.x->normal_gc, | |
430 | GCForeground | GCBackground | GCFont, &gcv); | |
431 | face->gc = f->display.x->normal_gc; | |
432 | face->foreground = gcv.foreground; | |
433 | face->background = gcv.background; | |
434 | face->font = XQueryFont (x_current_display, gcv.font); | |
435 | face->stipple = 0; | |
436 | face->underline = 0; | |
437 | } | |
438 | ||
439 | ensure_face_ready (f, 1); | |
440 | { | |
441 | XGCValues gcv; | |
442 | struct face *face = FRAME_FACES (f) [1]; | |
443 | ||
444 | XGetGCValues (x_current_display, f->display.x->reverse_gc, | |
445 | GCForeground | GCBackground | GCFont, &gcv); | |
446 | face->gc = f->display.x->reverse_gc; | |
447 | face->foreground = gcv.foreground; | |
448 | face->background = gcv.background; | |
449 | face->font = XQueryFont (x_current_display, gcv.font); | |
450 | face->stipple = 0; | |
451 | face->underline = 0; | |
452 | } | |
453 | } | |
454 | ||
455 | #if 0 | |
456 | void | |
457 | init_frame_faces (f) | |
458 | struct frame *f; | |
459 | { | |
460 | struct frame *other_frame = 0; | |
461 | Lisp_Object rest; | |
462 | ||
463 | for (rest = Vframe_list; !NILP (rest); rest = Fcdr (rest)) | |
464 | { | |
465 | struct frame *f2 = XFRAME (Fcar (rest)); | |
466 | if (f2 != f && FRAME_X_P (f2)) | |
467 | { | |
468 | other_frame = f2; | |
469 | break; | |
470 | } | |
471 | } | |
472 | ||
473 | if (other_frame) | |
474 | { | |
475 | /* Make sure this frame's face vector is as big as the others. */ | |
476 | FRAME_N_FACES (f) = FRAME_N_FACES (other_frame); | |
477 | FRAME_FACES (f) | |
478 | = (struct face **) xmalloc (FRAME_N_FACES (f) * sizeof (struct face *)); | |
479 | ||
480 | /* Make sure the frame has the two basic faces. */ | |
481 | FRAME_DEFAULT_FACE (f) | |
482 | = copy_face (FRAME_DEFAULT_FACE (other_frame)); | |
483 | FRAME_MODE_LINE_FACE (f) | |
484 | = copy_face (FRAME_MODE_LINE_FACE (other_frame)); | |
485 | } | |
486 | } | |
487 | #endif | |
488 | ||
489 | ||
490 | /* Called from Fdelete_frame. */ | |
491 | void | |
492 | free_frame_faces (f) | |
493 | struct frame *f; | |
494 | { | |
495 | Display *dpy = x_current_display; | |
496 | int i; | |
497 | ||
498 | for (i = 0; i < FRAME_N_FACES (f); i++) | |
499 | { | |
500 | struct face *face = FRAME_FACES (f) [i]; | |
501 | if (! face) | |
502 | continue; | |
503 | if (face->gc) | |
504 | XFreeGC (dpy, face->gc); | |
505 | unload_font (f, face->font); | |
506 | unload_color (f, face->foreground); | |
507 | unload_color (f, face->background); | |
508 | #if 0 | |
509 | unload_pixmap (f, face->stipple); | |
510 | #endif | |
511 | xfree (face); | |
512 | } | |
513 | xfree (FRAME_FACES (f)); | |
514 | FRAME_FACES (f) = 0; | |
515 | FRAME_N_FACES (f) = 0; | |
516 | } | |
c115973b | 517 | \f |
cb637678 JB |
518 | /* Interning faces in a frame's face array. */ |
519 | ||
520 | /* Find a match for NEW_FACE in a FRAME's face array, and add it if we don't | |
521 | find one. */ | |
522 | int | |
b6d40e46 | 523 | intern_frame_face (frame, new_face) |
cb637678 | 524 | struct frame *frame; |
b6d40e46 | 525 | struct face *new_face; |
cb637678 JB |
526 | { |
527 | int len = FRAME_N_FACES (frame); | |
528 | int i; | |
529 | ||
530 | /* Search for a face already on FRAME equivalent to FACE. */ | |
531 | for (i = 0; i < len; i++) | |
532 | { | |
533 | struct face *frame_face = FRAME_FACES (frame)[i]; | |
534 | ||
535 | if (frame_face && face_eql (new_face, frame_face)) | |
536 | return i; | |
537 | } | |
538 | ||
539 | /* We didn't find one; add a new one. */ | |
540 | i = next_face_id++; | |
541 | ||
542 | ensure_face_ready (frame, i); | |
f6b98e0b | 543 | bcopy (new_face, FRAME_FACES (frame)[i], sizeof (*new_face)); |
cb637678 JB |
544 | |
545 | return i; | |
546 | } | |
547 | ||
548 | /* Make face id ID valid on frame F. */ | |
549 | ||
550 | static void | |
551 | ensure_face_ready (f, id) | |
552 | struct frame *f; | |
553 | int id; | |
554 | { | |
555 | if (FRAME_N_FACES (f) <= id) | |
556 | { | |
557 | int n = id + 10; | |
558 | int i; | |
559 | if (!FRAME_N_FACES (f)) | |
560 | FRAME_FACES (f) | |
561 | = (struct face **) xmalloc (sizeof (struct face *) * n); | |
562 | else | |
563 | FRAME_FACES (f) | |
564 | = (struct face **) xrealloc (FRAME_FACES (f), | |
565 | sizeof (struct face *) * n); | |
566 | ||
567 | bzero (FRAME_FACES (f) + FRAME_N_FACES (f), | |
568 | (n - FRAME_N_FACES (f)) * sizeof (struct face *)); | |
569 | FRAME_N_FACES (f) = n; | |
570 | } | |
571 | ||
572 | if (FRAME_FACES (f) [id] == 0) | |
573 | FRAME_FACES (f) [id] = allocate_face (); | |
574 | } | |
575 | \f | |
576 | /* Computing faces appropriate for a given piece of text in a buffer. */ | |
577 | ||
7b7739b1 JB |
578 | /* Modify face TO by copying from FROM all properties which have |
579 | nondefault settings. */ | |
7b7739b1 JB |
580 | static void |
581 | merge_faces (from, to) | |
582 | struct face *from, *to; | |
583 | { | |
584 | if (from->font != (XFontStruct *)FACE_DEFAULT) | |
585 | { | |
586 | to->font = from->font; | |
587 | } | |
588 | if (from->foreground != FACE_DEFAULT) | |
589 | to->foreground = from->foreground; | |
590 | if (from->background != FACE_DEFAULT) | |
591 | to->background = from->background; | |
f211082d JB |
592 | if (from->stipple != FACE_DEFAULT) |
593 | to->stipple = from->stipple; | |
7b7739b1 JB |
594 | if (from->underline) |
595 | to->underline = from->underline; | |
596 | } | |
597 | ||
f211082d JB |
598 | struct sortvec |
599 | { | |
600 | Lisp_Object overlay; | |
601 | int beg, end; | |
602 | int priority; | |
603 | }; | |
604 | ||
cb637678 JB |
605 | static int |
606 | sort_overlays (s1, s2) | |
607 | struct sortvec *s1, *s2; | |
608 | { | |
609 | if (s1->priority != s2->priority) | |
610 | return s1->priority - s2->priority; | |
611 | if (s1->beg != s2->beg) | |
612 | return s1->beg - s2->beg; | |
613 | if (s1->end != s2->end) | |
614 | return s2->end - s1->end; | |
615 | return 0; | |
616 | } | |
617 | ||
618 | /* Return the face ID associated with a buffer position POS. | |
7b7739b1 JB |
619 | Store into *ENDPTR the position at which a different face is needed. |
620 | This does not take account of glyphs that specify their own face codes. | |
f6b98e0b | 621 | F is the frame in use for display, and W is a window displaying |
bc0db68d RS |
622 | the current buffer. |
623 | ||
624 | REGION_BEG, REGION_END delimit the region, so it can be highlighted. */ | |
625 | ||
cb637678 | 626 | int |
bc0db68d | 627 | compute_char_face (f, w, pos, region_beg, region_end, endptr) |
7b7739b1 | 628 | struct frame *f; |
f211082d | 629 | struct window *w; |
7b7739b1 | 630 | int pos; |
bc0db68d | 631 | int region_beg, region_end; |
7b7739b1 JB |
632 | int *endptr; |
633 | { | |
634 | struct face face; | |
b6d40e46 | 635 | Lisp_Object prop, position; |
7b7739b1 JB |
636 | int i, j, noverlays; |
637 | int facecode; | |
7b7739b1 JB |
638 | Lisp_Object *overlay_vec; |
639 | int len; | |
f211082d JB |
640 | struct sortvec *sortvec; |
641 | Lisp_Object frame; | |
f6b98e0b JB |
642 | int endpos; |
643 | ||
644 | /* W must display the current buffer. We could write this function | |
645 | to use the frame and buffer of W, but right now it doesn't. */ | |
646 | if (XBUFFER (w->buffer) != current_buffer) | |
647 | abort (); | |
f211082d JB |
648 | |
649 | XSET (frame, Lisp_Frame, f); | |
7b7739b1 | 650 | |
f6b98e0b | 651 | endpos = ZV; |
bc0db68d RS |
652 | if (pos < region_beg && region_beg < endpos) |
653 | endpos = region_beg; | |
f6b98e0b | 654 | |
7b7739b1 | 655 | XFASTINT (position) = pos; |
b6d40e46 JB |
656 | prop = Fget_text_property (position, Qface, w->buffer); |
657 | { | |
658 | Lisp_Object end; | |
7b7739b1 | 659 | |
b6d40e46 JB |
660 | end = Fnext_single_property_change (position, Qface, w->buffer); |
661 | if (INTEGERP (end)) | |
662 | endpos = XINT (end); | |
663 | } | |
664 | ||
665 | { | |
f6b98e0b | 666 | int next_overlay; |
b6d40e46 JB |
667 | |
668 | len = 10; | |
669 | overlay_vec = (Lisp_Object *) xmalloc (len * sizeof (Lisp_Object)); | |
f6b98e0b JB |
670 | noverlays = overlays_at (pos, &overlay_vec, &len, &next_overlay); |
671 | if (next_overlay < endpos) | |
672 | endpos = next_overlay; | |
b6d40e46 JB |
673 | } |
674 | ||
675 | *endptr = endpos; | |
7b7739b1 JB |
676 | |
677 | /* Optimize the default case. */ | |
bc0db68d RS |
678 | if (noverlays == 0 && NILP (prop) |
679 | && !(pos >= region_beg && pos < region_end)) | |
cb637678 | 680 | return 0; |
7b7739b1 | 681 | |
f211082d | 682 | bcopy (FRAME_DEFAULT_FACE (f), &face, sizeof (struct face)); |
f6b98e0b | 683 | face.gc = 0; |
7b7739b1 JB |
684 | |
685 | if (!NILP (prop)) | |
686 | { | |
f211082d JB |
687 | facecode = face_name_id_number (frame, prop); |
688 | if (facecode >= 0 && facecode < FRAME_N_FACES (f) | |
689 | && FRAME_FACES (f) [facecode] != 0) | |
690 | merge_faces (FRAME_FACES (f) [facecode], &face); | |
7b7739b1 JB |
691 | } |
692 | ||
f211082d JB |
693 | /* Put the valid and relevant overlays into sortvec. */ |
694 | sortvec = (struct sortvec *) alloca (noverlays * sizeof (struct sortvec)); | |
695 | ||
7b7739b1 JB |
696 | for (i = 0, j = 0; i < noverlays; i++) |
697 | { | |
b6d40e46 | 698 | Lisp_Object overlay = overlay_vec[i]; |
7b7739b1 JB |
699 | |
700 | if (OVERLAY_VALID (overlay) | |
701 | && OVERLAY_POSITION (OVERLAY_START (overlay)) > 0 | |
702 | && OVERLAY_POSITION (OVERLAY_END (overlay)) > 0) | |
f211082d JB |
703 | { |
704 | Lisp_Object window; | |
705 | window = Foverlay_get (overlay, Qwindow); | |
706 | ||
707 | /* Also ignore overlays limited to one window | |
708 | if it's not the window we are using. */ | |
f6b98e0b JB |
709 | if (XTYPE (window) != Lisp_Window |
710 | || XWINDOW (window) == w) | |
f211082d JB |
711 | { |
712 | Lisp_Object tem; | |
713 | ||
714 | /* This overlay is good and counts: | |
715 | put it in sortvec. */ | |
716 | sortvec[j].overlay = overlay; | |
717 | sortvec[j].beg = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
718 | sortvec[j].end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
719 | tem = Foverlay_get (overlay, Qpriority); | |
720 | if (INTEGERP (tem)) | |
721 | sortvec[j].priority = XINT (tem); | |
722 | else | |
723 | sortvec[j].priority = 0; | |
724 | j++; | |
725 | } | |
726 | } | |
7b7739b1 JB |
727 | } |
728 | noverlays = j; | |
729 | ||
f211082d JB |
730 | /* Sort the overlays into the proper order: increasing priority. */ |
731 | ||
bc0db68d RS |
732 | if (noverlays > 1) |
733 | qsort (sortvec, noverlays, sizeof (struct sortvec), sort_overlays); | |
7b7739b1 JB |
734 | |
735 | /* Now merge the overlay data in that order. */ | |
7b7739b1 JB |
736 | for (i = 0; i < noverlays; i++) |
737 | { | |
f6b98e0b | 738 | prop = Foverlay_get (sortvec[i].overlay, Qface); |
7b7739b1 JB |
739 | if (!NILP (prop)) |
740 | { | |
741 | Lisp_Object oend; | |
742 | int oendpos; | |
743 | ||
f211082d JB |
744 | facecode = face_name_id_number (frame, prop); |
745 | if (facecode >= 0 && facecode < FRAME_N_FACES (f) | |
746 | && FRAME_FACES (f) [facecode] != 0) | |
747 | merge_faces (FRAME_FACES (f) [facecode], &face); | |
7b7739b1 | 748 | |
f6b98e0b | 749 | oend = OVERLAY_END (sortvec[i].overlay); |
7b7739b1 | 750 | oendpos = OVERLAY_POSITION (oend); |
f6b98e0b | 751 | if (oendpos < endpos) |
7b7739b1 JB |
752 | endpos = oendpos; |
753 | } | |
754 | } | |
755 | ||
bc0db68d RS |
756 | if (pos >= region_beg && pos < region_end) |
757 | { | |
758 | if (region_end < endpos) | |
759 | endpos = region_end; | |
760 | if (region_face >= 0 && region_face < next_face_id) | |
761 | merge_faces (FRAME_FACES (f) [region_face], &face); | |
762 | } | |
763 | ||
7b7739b1 JB |
764 | xfree (overlay_vec); |
765 | ||
766 | *endptr = endpos; | |
767 | ||
cb637678 | 768 | return intern_frame_face (f, &face); |
f211082d JB |
769 | } |
770 | ||
cb637678 JB |
771 | /* Return the face ID to use to display a special glyph which selects |
772 | FACE_CODE as the face ID, assuming that ordinarily the face would | |
773 | be BASIC_FACE. F is the frame. */ | |
774 | int | |
18004d2b | 775 | compute_glyph_face (f, face_code) |
7b7739b1 | 776 | struct frame *f; |
7b7739b1 JB |
777 | int face_code; |
778 | { | |
779 | struct face face; | |
780 | ||
18004d2b | 781 | bcopy (FRAME_DEFAULT_FACE (f), &face, sizeof (face)); |
f6b98e0b | 782 | face.gc = 0; |
7b7739b1 | 783 | |
f211082d JB |
784 | if (face_code >= 0 && face_code < FRAME_N_FACES (f) |
785 | && FRAME_FACES (f) [face_code] != 0) | |
786 | merge_faces (FRAME_FACES (f) [face_code], &face); | |
7b7739b1 | 787 | |
cb637678 | 788 | return intern_frame_face (f, &face); |
c115973b | 789 | } |
c115973b | 790 | \f |
cb637678 | 791 | /* Lisp interface. */ |
c115973b JB |
792 | |
793 | DEFUN ("frame-face-alist", Fframe_face_alist, Sframe_face_alist, 1, 1, 0, | |
794 | "") | |
795 | (frame) | |
796 | Lisp_Object frame; | |
797 | { | |
798 | CHECK_FRAME (frame, 0); | |
799 | return XFRAME (frame)->face_alist; | |
800 | } | |
801 | ||
802 | DEFUN ("set-frame-face-alist", Fset_frame_face_alist, Sset_frame_face_alist, | |
803 | 2, 2, 0, "") | |
804 | (frame, value) | |
805 | Lisp_Object frame, value; | |
806 | { | |
807 | CHECK_FRAME (frame, 0); | |
808 | XFRAME (frame)->face_alist = value; | |
809 | return value; | |
810 | } | |
811 | ||
812 | ||
813 | DEFUN ("make-face-internal", Fmake_face_internal, Smake_face_internal, 1, 1, 0, | |
814 | "Create face number FACE-ID on all frames.") | |
815 | (face_id) | |
816 | Lisp_Object face_id; | |
817 | { | |
818 | Lisp_Object rest; | |
819 | int id = XINT (face_id); | |
820 | ||
f211082d JB |
821 | CHECK_NUMBER (face_id, 0); |
822 | if (id < 0 || id >= next_face_id) | |
823 | error ("Face id out of range"); | |
c115973b JB |
824 | |
825 | for (rest = Vframe_list; !NILP (rest); rest = XCONS (rest)->cdr) | |
826 | { | |
827 | struct frame *f = XFRAME (XCONS (rest)->car); | |
cb637678 JB |
828 | if (FRAME_X_P (f)) |
829 | ensure_face_ready (f, id); | |
c115973b JB |
830 | } |
831 | return Qnil; | |
832 | } | |
833 | ||
834 | ||
835 | DEFUN ("set-face-attribute-internal", Fset_face_attribute_internal, | |
836 | Sset_face_attribute_internal, 4, 4, 0, "") | |
837 | (face_id, attr_name, attr_value, frame) | |
838 | Lisp_Object face_id, attr_name, attr_value, frame; | |
839 | { | |
840 | struct face *face; | |
841 | struct frame *f; | |
842 | int magic_p; | |
843 | int id; | |
844 | ||
845 | CHECK_FRAME (frame, 0); | |
f211082d | 846 | CHECK_NUMBER (face_id, 0); |
c115973b JB |
847 | CHECK_SYMBOL (attr_name, 0); |
848 | ||
849 | f = XFRAME (frame); | |
850 | id = XINT (face_id); | |
f211082d JB |
851 | if (id < 0 || id >= next_face_id) |
852 | error ("Face id out of range"); | |
c115973b | 853 | |
b6d40e46 JB |
854 | if (! FRAME_X_P (f)) |
855 | return; | |
856 | ||
c115973b | 857 | ensure_face_ready (f, id); |
f211082d | 858 | face = FRAME_FACES (f) [XFASTINT (face_id)]; |
c115973b JB |
859 | |
860 | if (EQ (attr_name, intern ("font"))) | |
861 | { | |
f211082d | 862 | XFontStruct *font = load_font (f, attr_value); |
c115973b JB |
863 | unload_font (f, face->font); |
864 | face->font = font; | |
c115973b JB |
865 | } |
866 | else if (EQ (attr_name, intern ("foreground"))) | |
867 | { | |
f211082d | 868 | unsigned long new_color = load_color (f, attr_value); |
c115973b JB |
869 | unload_color (f, face->foreground); |
870 | face->foreground = new_color; | |
c115973b JB |
871 | } |
872 | else if (EQ (attr_name, intern ("background"))) | |
873 | { | |
f211082d | 874 | unsigned long new_color = load_color (f, attr_value); |
c115973b JB |
875 | unload_color (f, face->background); |
876 | face->background = new_color; | |
c115973b JB |
877 | } |
878 | #if 0 | |
879 | else if (EQ (attr_name, intern ("background-pixmap"))) | |
880 | { | |
c115973b JB |
881 | unsigned int w, h, d; |
882 | unsigned long new_pixmap = load_pixmap (f, attr_value, &w, &h, &d, 0); | |
f211082d JB |
883 | unload_pixmap (f, face->stipple); |
884 | if (NILP (attr_value)) | |
885 | new_pixmap = 0; | |
886 | face->stipple = new_pixmap; | |
c115973b JB |
887 | face->pixmap_w = w; |
888 | face->pixmap_h = h; | |
889 | /* face->pixmap_depth = d; */ | |
c115973b JB |
890 | } |
891 | #endif /* 0 */ | |
892 | else if (EQ (attr_name, intern ("underline"))) | |
893 | { | |
894 | int new = !NILP (attr_value); | |
895 | face->underline = new; | |
896 | } | |
897 | else | |
898 | error ("unknown face attribute"); | |
899 | ||
900 | if (id == 0) | |
901 | { | |
902 | BLOCK_INPUT; | |
f211082d JB |
903 | if (FRAME_DEFAULT_FACE (f)->gc != 0) |
904 | XFreeGC (x_current_display, FRAME_DEFAULT_FACE (f)->gc); | |
905 | build_face (f, FRAME_DEFAULT_FACE (f)); | |
c115973b JB |
906 | UNBLOCK_INPUT; |
907 | } | |
908 | ||
909 | if (id == 1) | |
910 | { | |
911 | BLOCK_INPUT; | |
f211082d JB |
912 | if (FRAME_MODE_LINE_FACE (f)->gc != 0) |
913 | XFreeGC (x_current_display, FRAME_MODE_LINE_FACE (f)->gc); | |
914 | build_face (f, FRAME_MODE_LINE_FACE (f)); | |
c115973b JB |
915 | UNBLOCK_INPUT; |
916 | } | |
917 | ||
918 | return Qnil; | |
919 | } | |
920 | ||
921 | DEFUN ("internal-next-face-id", Finternal_next_face_id, Sinternal_next_face_id, | |
922 | 0, 0, 0, "") | |
923 | () | |
924 | { | |
925 | return make_number (next_face_id++); | |
926 | } | |
f211082d JB |
927 | |
928 | /* Return the face id for name NAME on frame FRAME. | |
929 | (It should be the same for all frames, | |
930 | but it's as easy to use the "right" frame to look it up | |
931 | as to use any other one.) */ | |
932 | ||
933 | static Lisp_Object | |
934 | face_name_id_number (frame, name) | |
935 | Lisp_Object frame, name; | |
936 | { | |
937 | Lisp_Object tem; | |
938 | ||
939 | CHECK_FRAME (frame, 0); | |
940 | tem = Fcdr (Fassq (name, XFRAME (frame)->face_alist)); | |
b6d40e46 JB |
941 | if (NILP (tem)) |
942 | return 0; | |
f211082d JB |
943 | CHECK_VECTOR (tem, 0); |
944 | tem = XVECTOR (tem)->contents[2]; | |
945 | CHECK_NUMBER (tem, 0); | |
946 | return XINT (tem); | |
947 | } | |
c115973b | 948 | \f |
cb637678 JB |
949 | /* Emacs initialization. */ |
950 | ||
c115973b | 951 | void |
f211082d | 952 | syms_of_xfaces () |
c115973b | 953 | { |
f211082d JB |
954 | Qwindow = intern ("window"); |
955 | staticpro (&Qwindow); | |
956 | Qface = intern ("face"); | |
957 | staticpro (&Qface); | |
958 | Qpriority = intern ("priority"); | |
959 | staticpro (&Qpriority); | |
960 | ||
bc0db68d RS |
961 | DEFVAR_INT ("region-face", ®ion_face, |
962 | "Face number to use to highlight the region\n\ | |
963 | The region is highlighted with this face\n\ | |
964 | when Transient Mark mode is enabled and the mark is active."); | |
965 | ||
c115973b JB |
966 | defsubr (&Sframe_face_alist); |
967 | defsubr (&Sset_frame_face_alist); | |
968 | defsubr (&Smake_face_internal); | |
969 | defsubr (&Sset_face_attribute_internal); | |
970 | defsubr (&Sinternal_next_face_id); | |
971 | } | |
cb637678 JB |
972 | |
973 | #endif /* HAVE_X_WINDOWS */ | |
974 |