Commit | Line | Data |
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cb637678 | 1 | /* "Face" primitives. |
c6c5df7f | 2 | Copyright (C) 1993 Free Software Foundation. |
7b7739b1 | 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 | 36 | |
6233db35 RS |
37 | /* Compensate for bug in Xos.h on some systems. */ |
38 | #ifdef XOS_NEEDS_TIME_H | |
e11d186d RS |
39 | #include <time.h> |
40 | #define __TIMEVAL__ | |
41 | #endif | |
42 | ||
7a4d2269 JB |
43 | /* These don't seem to be used. */ |
44 | #if 0 | |
c115973b JB |
45 | /* Display Context for the icons */ |
46 | #include <X11/Intrinsic.h> | |
47 | #include <X11/StringDefs.h> | |
7a4d2269 JB |
48 | #include <X11/Xmu/Drawing.h> |
49 | #endif | |
50 | ||
c115973b JB |
51 | #include <X11/Xos.h> |
52 | ||
cb637678 JB |
53 | \f |
54 | /* An explanation of the face data structures. */ | |
55 | ||
56 | /* ========================= Face Data Structures ========================= | |
57 | ||
58 | All lisp code uses symbols as face names. | |
59 | ||
60 | Each frame has a face_alist member (with the frame-face-alist and | |
61 | set-frame-face-alist accessors), associating the face names with | |
62 | vectors of the form | |
63 | [face NAME ID FONT FOREGROUND BACKGROUND BACKGROUND-PIXMAP UNDERLINE-P] | |
64 | where | |
65 | face is the symbol `face', | |
66 | NAME is the symbol with which this vector is associated (a backpointer), | |
67 | ID is the face ID, an integer used internally by the C code to identify | |
68 | the face, | |
69 | FONT, FOREGROUND, and BACKGROUND are strings naming the fonts and colors | |
70 | to use with the face, | |
71 | BACKGROUND-PIXMAP is the name of an x bitmap filename, which we don't | |
72 | use right now, and | |
73 | UNDERLINE-P is non-nil if the face should be underlined. | |
660ed669 JB |
74 | If any of these elements are nil, that allows the frame's parameters to |
75 | show through. | |
cb637678 JB |
76 | (lisp/faces.el maintains these association lists.) |
77 | ||
78 | The frames' private alists hold the frame-local definitions for the | |
79 | faces. The lisp variable global-face-data contains the global | |
80 | defaults for faces. (See lisp/faces.el for this too.) | |
81 | ||
82 | In the C code, we also have a `struct face' with the elements | |
83 | `foreground', `background', `font', and `underline', | |
84 | which specify its visual appearance, and elements | |
85 | `gc' and `cached_index'; | |
86 | `gc' may be an X GC which has been built for the given display | |
87 | parameters. Faces with GC's are called `display faces'. Whether | |
88 | or not a face has a GC depends on what data structure the face is | |
89 | in; we explain these more below. (See src/dispextern.h.) | |
90 | ||
91 | Each frame also has members called `faces' and `n_faces' (with the | |
92 | accessors FRAME_FACES and FRAME_N_FACES), which define an array of | |
93 | struct face pointers, indexed by face ID (element 2 of the | |
94 | vector). These are called "frame faces". | |
95 | Element 0 is the default face --- the one used for normal text. | |
96 | Element 1 is the modeline face. | |
7b37f67b JB |
97 | These faces have their GC's set; the rest do not. |
98 | If faces[i] is filled in (i.e. non-zero) on one frame, then it must | |
99 | be filled in on all frames. Code assumes that face ID's can be | |
100 | used on any frame. (See src/xterm.h.) | |
cb637678 JB |
101 | |
102 | The global variables `face_vector' and `nfaces' define another | |
103 | array of struct face pointers, with their GC's set. This array | |
104 | acts as a cache of GC's to be used by all frames. The function | |
105 | `intern_face', passed a struct face *, searches face_vector for a | |
106 | struct face with the same parameters, adds a new one with a GC if | |
107 | it doesn't find one, and returns it. If you have a `struct face', | |
108 | and you want a GC for it, call intern_face on that struct, and it | |
109 | will return a `struct face *' with its GC set. The faces in | |
110 | face_vector are called `cached faces.' (See src/xfaces.c.) | |
111 | ||
112 | The `GLYPH' data type is an unsigned integer type; the bottom byte | |
113 | is a character code, and the byte above that is a face id. The | |
114 | `struct frame_glyphs' structure, used to describe frames' current | |
115 | or desired contents, is essentially a matrix of GLYPHs; the face | |
116 | ID's in a struct frame_glyphs are indices into FRAME_FACES. (See | |
117 | src/dispextern.h.) | |
118 | ||
119 | Some subtleties: | |
7b7739b1 | 120 | |
cb637678 JB |
121 | Since face_vector is just a cache --- there are no pointers into it |
122 | from the rest of the code, and everyone accesses it through | |
123 | intern_face --- we could just free its GC's and throw the whole | |
124 | thing away without breaking anything. This gives us a simple way | |
125 | to garbage-collect old GC's nobody's using any more - we can just | |
126 | purge face_vector, and then let subsequent calls to intern_face | |
127 | refill it as needed. The function clear_face_vector performs this | |
128 | purge. | |
129 | ||
130 | We're often applying intern_face to faces in frames' local arrays - | |
131 | for example, we do this while sending GLYPHs from a struct | |
132 | frame_glyphs to X during redisplay. It would be nice to avoid | |
133 | searching all of face_vector every time we intern a frame's face. | |
134 | So, when intern_face finds a match for FACE in face_vector, it | |
135 | stores the index of the match in FACE's cached_index member, and | |
136 | checks there first next time. */ | |
137 | ||
138 | \f | |
139 | /* Definitions and declarations. */ | |
140 | ||
c115973b JB |
141 | /* A table of display faces. */ |
142 | struct face **face_vector; | |
143 | /* The length in use of the table. */ | |
144 | int nfaces; | |
145 | /* The allocated length of the table. */ | |
146 | int nfaces_allocated; | |
147 | ||
148 | /* The number of face-id's in use (same for all frames). */ | |
149 | int next_face_id; | |
150 | ||
bc0db68d RS |
151 | /* The number of the face to use to indicate the region. */ |
152 | int region_face; | |
153 | ||
9516fe94 RS |
154 | /* This is what appears in a slot in a face to signify that the face |
155 | does not specify that display aspect. */ | |
7b7739b1 JB |
156 | #define FACE_DEFAULT (~0) |
157 | ||
f211082d JB |
158 | Lisp_Object Qface, Qwindow, Qpriority; |
159 | ||
c115973b | 160 | static void build_face (); |
1d9fd7fe | 161 | int face_name_id_number (); |
cb637678 JB |
162 | |
163 | struct face *intern_face (); | |
164 | static void ensure_face_ready (); | |
c115973b | 165 | \f |
cb637678 JB |
166 | /* Allocating, copying, and comparing struct faces. */ |
167 | ||
168 | /* Allocate a new face */ | |
169 | static struct face * | |
170 | allocate_face () | |
171 | { | |
172 | struct face *result = (struct face *) xmalloc (sizeof (struct face)); | |
173 | bzero (result, sizeof (struct face)); | |
174 | result->font = (XFontStruct *) FACE_DEFAULT; | |
175 | result->foreground = FACE_DEFAULT; | |
176 | result->background = FACE_DEFAULT; | |
177 | result->stipple = FACE_DEFAULT; | |
178 | return result; | |
179 | } | |
c115973b | 180 | |
cb637678 | 181 | /* Make a new face that's a copy of an existing one. */ |
c115973b JB |
182 | static struct face * |
183 | copy_face (face) | |
184 | struct face *face; | |
185 | { | |
186 | struct face *result = allocate_face (); | |
187 | ||
188 | result->font = face->font; | |
189 | result->foreground = face->foreground; | |
190 | result->background = face->background; | |
f211082d | 191 | result->stipple = face->stipple; |
c115973b JB |
192 | result->underline = face->underline; |
193 | ||
194 | return result; | |
195 | } | |
196 | ||
197 | static int | |
198 | face_eql (face1, face2) | |
199 | struct face *face1, *face2; | |
200 | { | |
cb637678 | 201 | return ( face1->font == face2->font |
c115973b JB |
202 | && face1->foreground == face2->foreground |
203 | && face1->background == face2->background | |
cb637678 JB |
204 | && face1->stipple == face2->stipple |
205 | && face1->underline == face2->underline); | |
c115973b | 206 | } |
cb637678 JB |
207 | \f |
208 | /* Interning faces in the `face_vector' cache, and clearing that cache. */ | |
c115973b JB |
209 | |
210 | /* Return the unique display face corresponding to the user-level face FACE. | |
c115973b JB |
211 | If there isn't one, make one, and find a slot in the face_vector to |
212 | put it in. */ | |
c115973b | 213 | static struct face * |
7b7739b1 | 214 | get_cached_face (f, face) |
c115973b JB |
215 | struct frame *f; |
216 | struct face *face; | |
217 | { | |
218 | int i, empty = -1; | |
f211082d | 219 | struct face *result; |
c115973b | 220 | |
cb637678 JB |
221 | /* Perhaps FACE->cached_index is valid; this could happen if FACE is |
222 | in a frame's face list. */ | |
223 | if (face->cached_index >= 0 | |
224 | && face->cached_index < nfaces | |
225 | && face_eql (face_vector[face->cached_index], face)) | |
226 | return face_vector[face->cached_index]; | |
227 | ||
c115973b JB |
228 | /* Look for an existing display face that does the job. |
229 | Also find an empty slot if any. */ | |
230 | for (i = 0; i < nfaces; i++) | |
231 | { | |
232 | if (face_eql (face_vector[i], face)) | |
233 | return face_vector[i]; | |
234 | if (face_vector[i] == 0) | |
235 | empty = i; | |
236 | } | |
237 | ||
238 | /* If no empty slots, make one. */ | |
239 | if (empty < 0 && nfaces == nfaces_allocated) | |
240 | { | |
241 | int newsize = nfaces + 20; | |
242 | face_vector | |
243 | = (struct face **) xrealloc (face_vector, | |
244 | newsize * sizeof (struct face *)); | |
245 | nfaces_allocated = newsize; | |
246 | } | |
247 | ||
248 | if (empty < 0) | |
249 | empty = nfaces++; | |
250 | ||
251 | /* Put a new display face in the empty slot. */ | |
252 | result = copy_face (face); | |
253 | face_vector[empty] = result; | |
254 | ||
255 | /* Make a graphics context for it. */ | |
256 | build_face (f, result); | |
257 | ||
258 | return result; | |
259 | } | |
260 | ||
cb637678 JB |
261 | /* Given a frame face, return an equivalent display face |
262 | (one which has a graphics context). */ | |
263 | ||
264 | struct face * | |
265 | intern_face (f, face) | |
266 | struct frame *f; | |
267 | struct face *face; | |
268 | { | |
cb637678 JB |
269 | /* If it's equivalent to the default face, use that. */ |
270 | if (face_eql (face, FRAME_DEFAULT_FACE (f))) | |
271 | { | |
272 | if (!FRAME_DEFAULT_FACE (f)->gc) | |
273 | build_face (f, FRAME_DEFAULT_FACE (f)); | |
274 | return FRAME_DEFAULT_FACE (f); | |
275 | } | |
276 | ||
277 | /* If it's equivalent to the mode line face, use that. */ | |
278 | if (face_eql (face, FRAME_MODE_LINE_FACE (f))) | |
279 | { | |
280 | if (!FRAME_MODE_LINE_FACE (f)->gc) | |
281 | build_face (f, FRAME_MODE_LINE_FACE (f)); | |
282 | return FRAME_MODE_LINE_FACE (f); | |
283 | } | |
284 | ||
f6b98e0b JB |
285 | /* If it's not one of the frame's default faces, it shouldn't have a GC. */ |
286 | if (face->gc) | |
287 | abort (); | |
288 | ||
cb637678 JB |
289 | /* Get a specialized display face. */ |
290 | return get_cached_face (f, face); | |
291 | } | |
292 | ||
c115973b JB |
293 | /* Clear out face_vector and start anew. |
294 | This should be done from time to time just to avoid | |
295 | keeping too many graphics contexts in face_vector | |
296 | that are no longer needed. */ | |
297 | ||
298 | void | |
299 | clear_face_vector () | |
300 | { | |
301 | Lisp_Object rest; | |
302 | Display *dpy = x_current_display; | |
f211082d | 303 | int i; |
c115973b JB |
304 | |
305 | BLOCK_INPUT; | |
306 | /* Free the display faces in the face_vector. */ | |
307 | for (i = 0; i < nfaces; i++) | |
308 | { | |
309 | struct face *face = face_vector[i]; | |
f211082d JB |
310 | if (face->gc) |
311 | XFreeGC (dpy, face->gc); | |
c115973b JB |
312 | xfree (face); |
313 | } | |
314 | nfaces = 0; | |
315 | ||
316 | UNBLOCK_INPUT; | |
317 | } | |
318 | \f | |
cb637678 JB |
319 | /* Allocating and freeing X resources for display faces. */ |
320 | ||
f211082d JB |
321 | /* Make a graphics context for face FACE, which is on frame F, |
322 | if that can be done. */ | |
c115973b JB |
323 | static void |
324 | build_face (f, face) | |
cb637678 JB |
325 | struct frame *f; |
326 | struct face *face; | |
c115973b JB |
327 | { |
328 | GC gc; | |
329 | XGCValues xgcv; | |
330 | unsigned long mask; | |
331 | ||
660ed669 JB |
332 | BLOCK_INPUT; |
333 | ||
f211082d JB |
334 | if (face->foreground != FACE_DEFAULT) |
335 | xgcv.foreground = face->foreground; | |
336 | else | |
660ed669 JB |
337 | xgcv.foreground = f->display.x->foreground_pixel; |
338 | ||
f211082d JB |
339 | if (face->background != FACE_DEFAULT) |
340 | xgcv.background = face->background; | |
341 | else | |
660ed669 JB |
342 | xgcv.background = f->display.x->background_pixel; |
343 | ||
f211082d JB |
344 | if (face->font && (int) face->font != FACE_DEFAULT) |
345 | xgcv.font = face->font->fid; | |
346 | else | |
347 | xgcv.font = f->display.x->font->fid; | |
660ed669 | 348 | |
c115973b | 349 | xgcv.graphics_exposures = 0; |
660ed669 | 350 | |
c115973b JB |
351 | mask = GCForeground | GCBackground | GCFont | GCGraphicsExposures; |
352 | gc = XCreateGC (x_current_display, FRAME_X_WINDOW (f), | |
353 | mask, &xgcv); | |
660ed669 | 354 | |
c115973b | 355 | #if 0 |
f211082d JB |
356 | if (face->stipple && face->stipple != FACE_DEFAULT) |
357 | XSetStipple (x_current_display, gc, face->stipple); | |
c115973b | 358 | #endif |
660ed669 | 359 | |
f211082d | 360 | face->gc = gc; |
660ed669 JB |
361 | |
362 | UNBLOCK_INPUT; | |
c115973b | 363 | } |
cb637678 JB |
364 | |
365 | /* Allocating, freeing, and duplicating fonts, colors, and pixmaps. */ | |
366 | ||
367 | static XFontStruct * | |
368 | load_font (f, name) | |
369 | struct frame *f; | |
370 | Lisp_Object name; | |
371 | { | |
372 | XFontStruct *font; | |
373 | ||
374 | if (NILP (name)) | |
375 | return (XFontStruct *) FACE_DEFAULT; | |
376 | ||
377 | CHECK_STRING (name, 0); | |
378 | BLOCK_INPUT; | |
379 | font = XLoadQueryFont (x_current_display, (char *) XSTRING (name)->data); | |
380 | UNBLOCK_INPUT; | |
381 | ||
382 | if (! font) | |
383 | Fsignal (Qerror, Fcons (build_string ("undefined font"), | |
384 | Fcons (name, Qnil))); | |
385 | return font; | |
386 | } | |
387 | ||
388 | static void | |
389 | unload_font (f, font) | |
390 | struct frame *f; | |
391 | XFontStruct *font; | |
392 | { | |
393 | if (!font || font == ((XFontStruct *) FACE_DEFAULT)) | |
394 | return; | |
660ed669 JB |
395 | |
396 | BLOCK_INPUT; | |
cb637678 | 397 | XFreeFont (x_current_display, font); |
660ed669 | 398 | UNBLOCK_INPUT; |
cb637678 JB |
399 | } |
400 | ||
401 | static unsigned long | |
402 | load_color (f, name) | |
403 | struct frame *f; | |
404 | Lisp_Object name; | |
405 | { | |
406 | Display *dpy = x_current_display; | |
407 | Colormap cmap; | |
408 | XColor color; | |
409 | int result; | |
410 | ||
411 | if (NILP (name)) | |
412 | return FACE_DEFAULT; | |
413 | ||
414 | cmap = DefaultColormapOfScreen (DefaultScreenOfDisplay (x_current_display)); | |
415 | ||
416 | CHECK_STRING (name, 0); | |
417 | BLOCK_INPUT; | |
418 | result = XParseColor (dpy, cmap, (char *) XSTRING (name)->data, &color); | |
419 | UNBLOCK_INPUT; | |
420 | if (! result) | |
421 | Fsignal (Qerror, Fcons (build_string ("undefined color"), | |
422 | Fcons (name, Qnil))); | |
423 | BLOCK_INPUT; | |
424 | result = XAllocColor (dpy, cmap, &color); | |
425 | UNBLOCK_INPUT; | |
426 | if (! result) | |
427 | Fsignal (Qerror, Fcons (build_string ("X server cannot allocate color"), | |
428 | Fcons (name, Qnil))); | |
429 | return (unsigned long) color.pixel; | |
430 | } | |
431 | ||
432 | static void | |
433 | unload_color (f, pixel) | |
434 | struct frame *f; | |
7a4d2269 | 435 | unsigned long pixel; |
cb637678 | 436 | { |
1d9fd7fe JB |
437 | /* Since faces get built by copying parameters from other faces, the |
438 | allocation counts for the colors get all screwed up. I don't see | |
439 | any solution that will take less than 10 minutes, and it's better | |
440 | to have a color leak than a crash, so I'm just dyking this out. | |
441 | This isn't really a color leak, anyway - if we ask for it again, | |
442 | we'll get the same pixel. */ | |
443 | #if 0 | |
cb637678 JB |
444 | Colormap cmap; |
445 | Display *dpy = x_current_display; | |
32dc0866 JB |
446 | if (pixel == FACE_DEFAULT |
447 | || pixel == BLACK_PIX_DEFAULT | |
448 | || pixel == WHITE_PIX_DEFAULT) | |
cb637678 JB |
449 | return; |
450 | cmap = DefaultColormapOfScreen (DefaultScreenOfDisplay (x_current_display)); | |
451 | BLOCK_INPUT; | |
452 | XFreeColors (dpy, cmap, &pixel, 1, 0); | |
453 | UNBLOCK_INPUT; | |
1d9fd7fe | 454 | #endif |
cb637678 JB |
455 | } |
456 | \f | |
457 | /* Initializing face arrays for frames. */ | |
458 | ||
cb637678 JB |
459 | void |
460 | init_frame_faces (f) | |
660ed669 | 461 | FRAME_PTR f; |
cb637678 JB |
462 | { |
463 | ensure_face_ready (f, 0); | |
cb637678 | 464 | ensure_face_ready (f, 1); |
660ed669 JB |
465 | |
466 | recompute_basic_faces (f); | |
7b37f67b | 467 | |
1120eb5e JB |
468 | /* Find another X frame. */ |
469 | { | |
470 | Lisp_Object tail, frame, result; | |
471 | ||
472 | result = Qnil; | |
473 | FOR_EACH_FRAME (tail, frame) | |
474 | if (FRAME_X_P (XFRAME (frame)) | |
475 | && XFRAME (frame) != f) | |
476 | { | |
477 | result = frame; | |
478 | break; | |
479 | } | |
480 | ||
481 | /* If we didn't find any X frames other than f, then we don't need | |
482 | any faces other than 0 and 1, so we're okay. Otherwise, make | |
483 | sure that all faces valid on the selected frame are also valid | |
484 | on this new frame. */ | |
485 | if (FRAMEP (result)) | |
486 | { | |
487 | int i; | |
488 | int n_faces = XFRAME (result)->display.x->n_faces; | |
489 | struct face **faces = XFRAME (result)->display.x->faces; | |
490 | ||
491 | for (i = 2; i < n_faces; i++) | |
492 | if (faces[i]) | |
493 | ensure_face_ready (f, i); | |
494 | } | |
495 | } | |
cb637678 JB |
496 | } |
497 | ||
660ed669 | 498 | |
cb637678 JB |
499 | /* Called from Fdelete_frame. */ |
500 | void | |
501 | free_frame_faces (f) | |
502 | struct frame *f; | |
503 | { | |
504 | Display *dpy = x_current_display; | |
505 | int i; | |
506 | ||
660ed669 JB |
507 | BLOCK_INPUT; |
508 | ||
509 | for (i = 0; i < FRAME_N_FACES (f); i++) | |
cb637678 JB |
510 | { |
511 | struct face *face = FRAME_FACES (f) [i]; | |
660ed669 JB |
512 | if (face) |
513 | { | |
514 | if (face->gc) | |
515 | XFreeGC (dpy, face->gc); | |
516 | if (! face->copy) | |
517 | { | |
518 | unload_font (f, face->font); | |
519 | unload_color (f, face->foreground); | |
520 | unload_color (f, face->background); | |
cb637678 | 521 | #if 0 |
660ed669 | 522 | unload_pixmap (f, face->stipple); |
cb637678 | 523 | #endif |
660ed669 JB |
524 | } |
525 | xfree (face); | |
526 | } | |
cb637678 JB |
527 | } |
528 | xfree (FRAME_FACES (f)); | |
529 | FRAME_FACES (f) = 0; | |
530 | FRAME_N_FACES (f) = 0; | |
660ed669 JB |
531 | |
532 | UNBLOCK_INPUT; | |
cb637678 | 533 | } |
c115973b | 534 | \f |
cb637678 JB |
535 | /* Interning faces in a frame's face array. */ |
536 | ||
537 | /* Find a match for NEW_FACE in a FRAME's face array, and add it if we don't | |
538 | find one. */ | |
660ed669 | 539 | static int |
b6d40e46 | 540 | intern_frame_face (frame, new_face) |
cb637678 | 541 | struct frame *frame; |
b6d40e46 | 542 | struct face *new_face; |
cb637678 JB |
543 | { |
544 | int len = FRAME_N_FACES (frame); | |
545 | int i; | |
546 | ||
547 | /* Search for a face already on FRAME equivalent to FACE. */ | |
548 | for (i = 0; i < len; i++) | |
549 | { | |
550 | struct face *frame_face = FRAME_FACES (frame)[i]; | |
551 | ||
552 | if (frame_face && face_eql (new_face, frame_face)) | |
553 | return i; | |
554 | } | |
555 | ||
556 | /* We didn't find one; add a new one. */ | |
557 | i = next_face_id++; | |
558 | ||
559 | ensure_face_ready (frame, i); | |
f6b98e0b | 560 | bcopy (new_face, FRAME_FACES (frame)[i], sizeof (*new_face)); |
660ed669 | 561 | FRAME_FACES (frame)[i]->copy = 1; |
cb637678 JB |
562 | |
563 | return i; | |
564 | } | |
565 | ||
566 | /* Make face id ID valid on frame F. */ | |
567 | ||
568 | static void | |
569 | ensure_face_ready (f, id) | |
570 | struct frame *f; | |
571 | int id; | |
572 | { | |
573 | if (FRAME_N_FACES (f) <= id) | |
574 | { | |
575 | int n = id + 10; | |
576 | int i; | |
577 | if (!FRAME_N_FACES (f)) | |
578 | FRAME_FACES (f) | |
579 | = (struct face **) xmalloc (sizeof (struct face *) * n); | |
580 | else | |
581 | FRAME_FACES (f) | |
582 | = (struct face **) xrealloc (FRAME_FACES (f), | |
583 | sizeof (struct face *) * n); | |
584 | ||
585 | bzero (FRAME_FACES (f) + FRAME_N_FACES (f), | |
586 | (n - FRAME_N_FACES (f)) * sizeof (struct face *)); | |
587 | FRAME_N_FACES (f) = n; | |
588 | } | |
589 | ||
590 | if (FRAME_FACES (f) [id] == 0) | |
591 | FRAME_FACES (f) [id] = allocate_face (); | |
592 | } | |
593 | \f | |
594 | /* Computing faces appropriate for a given piece of text in a buffer. */ | |
595 | ||
660ed669 JB |
596 | /* Return non-zero if FONT1 and FONT2 have the same size bounding box. |
597 | We assume that they're both character-cell fonts. */ | |
598 | int | |
599 | same_size_fonts (font1, font2) | |
600 | XFontStruct *font1, *font2; | |
601 | { | |
602 | XCharStruct *bounds1 = &font1->min_bounds; | |
603 | XCharStruct *bounds2 = &font2->min_bounds; | |
604 | ||
46407861 RS |
605 | return (bounds1->width == bounds2->width); |
606 | /* Checking the following caused bad results in some cases | |
607 | when fonts that should be the same size | |
608 | actually have very slightly different size. | |
609 | It is possible that this reintroduces the bug whereby line positions | |
610 | were not right. However, the right way to fix that is to change xterm.c | |
611 | so that the vertical positions of lines | |
612 | depend only on the height of the frame's font. | |
660ed669 | 613 | && bounds1->ascent == bounds2->ascent |
46407861 | 614 | && bounds1->descent == bounds2->descent); */ |
660ed669 JB |
615 | } |
616 | ||
7b7739b1 JB |
617 | /* Modify face TO by copying from FROM all properties which have |
618 | nondefault settings. */ | |
7b7739b1 JB |
619 | static void |
620 | merge_faces (from, to) | |
621 | struct face *from, *to; | |
622 | { | |
68a97335 JB |
623 | /* Only merge the font if it's the same size as the base font. */ |
624 | if (from->font != (XFontStruct *) FACE_DEFAULT | |
68a97335 JB |
625 | && same_size_fonts (from->font, to->font)) |
626 | to->font = from->font; | |
7b7739b1 JB |
627 | if (from->foreground != FACE_DEFAULT) |
628 | to->foreground = from->foreground; | |
629 | if (from->background != FACE_DEFAULT) | |
630 | to->background = from->background; | |
f211082d JB |
631 | if (from->stipple != FACE_DEFAULT) |
632 | to->stipple = from->stipple; | |
7b7739b1 JB |
633 | if (from->underline) |
634 | to->underline = from->underline; | |
635 | } | |
636 | ||
660ed669 JB |
637 | /* Set up the basic set of facial parameters, based on the frame's |
638 | data; all faces are deltas applied to this. */ | |
639 | static void | |
640 | compute_base_face (f, face) | |
641 | FRAME_PTR f; | |
642 | struct face *face; | |
643 | { | |
644 | struct x_display *d = f->display.x; | |
645 | ||
646 | face->gc = 0; | |
647 | face->foreground = d->foreground_pixel; | |
648 | face->background = d->background_pixel; | |
649 | face->font = d->font; | |
650 | face->underline = 0; | |
651 | } | |
652 | ||
653 | ||
f211082d JB |
654 | struct sortvec |
655 | { | |
656 | Lisp_Object overlay; | |
657 | int beg, end; | |
658 | int priority; | |
659 | }; | |
660 | ||
cb637678 JB |
661 | static int |
662 | sort_overlays (s1, s2) | |
663 | struct sortvec *s1, *s2; | |
664 | { | |
665 | if (s1->priority != s2->priority) | |
666 | return s1->priority - s2->priority; | |
667 | if (s1->beg != s2->beg) | |
668 | return s1->beg - s2->beg; | |
669 | if (s1->end != s2->end) | |
670 | return s2->end - s1->end; | |
671 | return 0; | |
672 | } | |
673 | ||
674 | /* Return the face ID associated with a buffer position POS. | |
7b7739b1 JB |
675 | Store into *ENDPTR the position at which a different face is needed. |
676 | This does not take account of glyphs that specify their own face codes. | |
f6b98e0b | 677 | F is the frame in use for display, and W is a window displaying |
bc0db68d RS |
678 | the current buffer. |
679 | ||
680 | REGION_BEG, REGION_END delimit the region, so it can be highlighted. */ | |
681 | ||
cb637678 | 682 | int |
bc0db68d | 683 | compute_char_face (f, w, pos, region_beg, region_end, endptr) |
7b7739b1 | 684 | struct frame *f; |
f211082d | 685 | struct window *w; |
7b7739b1 | 686 | int pos; |
bc0db68d | 687 | int region_beg, region_end; |
7b7739b1 JB |
688 | int *endptr; |
689 | { | |
690 | struct face face; | |
b6d40e46 | 691 | Lisp_Object prop, position; |
7b7739b1 JB |
692 | int i, j, noverlays; |
693 | int facecode; | |
7b7739b1 | 694 | Lisp_Object *overlay_vec; |
f211082d JB |
695 | struct sortvec *sortvec; |
696 | Lisp_Object frame; | |
f6b98e0b JB |
697 | int endpos; |
698 | ||
699 | /* W must display the current buffer. We could write this function | |
700 | to use the frame and buffer of W, but right now it doesn't. */ | |
701 | if (XBUFFER (w->buffer) != current_buffer) | |
702 | abort (); | |
f211082d JB |
703 | |
704 | XSET (frame, Lisp_Frame, f); | |
7b7739b1 | 705 | |
f6b98e0b | 706 | endpos = ZV; |
bc0db68d RS |
707 | if (pos < region_beg && region_beg < endpos) |
708 | endpos = region_beg; | |
f6b98e0b | 709 | |
7b7739b1 | 710 | XFASTINT (position) = pos; |
b6d40e46 JB |
711 | prop = Fget_text_property (position, Qface, w->buffer); |
712 | { | |
713 | Lisp_Object end; | |
7b7739b1 | 714 | |
b6d40e46 JB |
715 | end = Fnext_single_property_change (position, Qface, w->buffer); |
716 | if (INTEGERP (end)) | |
717 | endpos = XINT (end); | |
718 | } | |
719 | ||
720 | { | |
f6b98e0b | 721 | int next_overlay; |
9516fe94 RS |
722 | int len; |
723 | ||
724 | /* First try with room for 40 overlays. */ | |
725 | len = 40; | |
726 | overlay_vec = (Lisp_Object *) alloca (len * sizeof (Lisp_Object)); | |
727 | ||
728 | noverlays = overlays_at (pos, 0, &overlay_vec, &len, &next_overlay); | |
729 | ||
730 | /* If there are more than 40, | |
731 | make enough space for all, and try again. */ | |
732 | if (noverlays > len) | |
733 | { | |
734 | len = noverlays; | |
735 | overlay_vec = (Lisp_Object *) alloca (len * sizeof (Lisp_Object)); | |
736 | noverlays = overlays_at (pos, 0, &overlay_vec, &len, &next_overlay); | |
737 | } | |
b6d40e46 | 738 | |
f6b98e0b JB |
739 | if (next_overlay < endpos) |
740 | endpos = next_overlay; | |
b6d40e46 JB |
741 | } |
742 | ||
743 | *endptr = endpos; | |
7b7739b1 JB |
744 | |
745 | /* Optimize the default case. */ | |
bc0db68d RS |
746 | if (noverlays == 0 && NILP (prop) |
747 | && !(pos >= region_beg && pos < region_end)) | |
cb637678 | 748 | return 0; |
7b7739b1 | 749 | |
660ed669 | 750 | compute_base_face (f, &face); |
7b7739b1 JB |
751 | |
752 | if (!NILP (prop)) | |
753 | { | |
1d9fd7fe | 754 | facecode = face_name_id_number (f, prop); |
f211082d JB |
755 | if (facecode >= 0 && facecode < FRAME_N_FACES (f) |
756 | && FRAME_FACES (f) [facecode] != 0) | |
757 | merge_faces (FRAME_FACES (f) [facecode], &face); | |
7b7739b1 JB |
758 | } |
759 | ||
f211082d JB |
760 | /* Put the valid and relevant overlays into sortvec. */ |
761 | sortvec = (struct sortvec *) alloca (noverlays * sizeof (struct sortvec)); | |
762 | ||
7b7739b1 JB |
763 | for (i = 0, j = 0; i < noverlays; i++) |
764 | { | |
b6d40e46 | 765 | Lisp_Object overlay = overlay_vec[i]; |
7b7739b1 JB |
766 | |
767 | if (OVERLAY_VALID (overlay) | |
768 | && OVERLAY_POSITION (OVERLAY_START (overlay)) > 0 | |
769 | && OVERLAY_POSITION (OVERLAY_END (overlay)) > 0) | |
f211082d JB |
770 | { |
771 | Lisp_Object window; | |
772 | window = Foverlay_get (overlay, Qwindow); | |
773 | ||
774 | /* Also ignore overlays limited to one window | |
775 | if it's not the window we are using. */ | |
f6b98e0b JB |
776 | if (XTYPE (window) != Lisp_Window |
777 | || XWINDOW (window) == w) | |
f211082d JB |
778 | { |
779 | Lisp_Object tem; | |
780 | ||
781 | /* This overlay is good and counts: | |
782 | put it in sortvec. */ | |
783 | sortvec[j].overlay = overlay; | |
784 | sortvec[j].beg = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
785 | sortvec[j].end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
786 | tem = Foverlay_get (overlay, Qpriority); | |
787 | if (INTEGERP (tem)) | |
788 | sortvec[j].priority = XINT (tem); | |
789 | else | |
790 | sortvec[j].priority = 0; | |
791 | j++; | |
792 | } | |
793 | } | |
7b7739b1 JB |
794 | } |
795 | noverlays = j; | |
796 | ||
f211082d JB |
797 | /* Sort the overlays into the proper order: increasing priority. */ |
798 | ||
bc0db68d RS |
799 | if (noverlays > 1) |
800 | qsort (sortvec, noverlays, sizeof (struct sortvec), sort_overlays); | |
7b7739b1 JB |
801 | |
802 | /* Now merge the overlay data in that order. */ | |
7b7739b1 JB |
803 | for (i = 0; i < noverlays; i++) |
804 | { | |
f6b98e0b | 805 | prop = Foverlay_get (sortvec[i].overlay, Qface); |
7b7739b1 JB |
806 | if (!NILP (prop)) |
807 | { | |
808 | Lisp_Object oend; | |
809 | int oendpos; | |
810 | ||
1d9fd7fe | 811 | facecode = face_name_id_number (f, prop); |
f211082d JB |
812 | if (facecode >= 0 && facecode < FRAME_N_FACES (f) |
813 | && FRAME_FACES (f) [facecode] != 0) | |
814 | merge_faces (FRAME_FACES (f) [facecode], &face); | |
7b7739b1 | 815 | |
f6b98e0b | 816 | oend = OVERLAY_END (sortvec[i].overlay); |
7b7739b1 | 817 | oendpos = OVERLAY_POSITION (oend); |
f6b98e0b | 818 | if (oendpos < endpos) |
7b7739b1 JB |
819 | endpos = oendpos; |
820 | } | |
821 | } | |
822 | ||
bc0db68d RS |
823 | if (pos >= region_beg && pos < region_end) |
824 | { | |
825 | if (region_end < endpos) | |
826 | endpos = region_end; | |
827 | if (region_face >= 0 && region_face < next_face_id) | |
828 | merge_faces (FRAME_FACES (f) [region_face], &face); | |
829 | } | |
830 | ||
7b7739b1 JB |
831 | *endptr = endpos; |
832 | ||
cb637678 | 833 | return intern_frame_face (f, &face); |
f211082d JB |
834 | } |
835 | ||
cb637678 JB |
836 | /* Return the face ID to use to display a special glyph which selects |
837 | FACE_CODE as the face ID, assuming that ordinarily the face would | |
838 | be BASIC_FACE. F is the frame. */ | |
839 | int | |
18004d2b | 840 | compute_glyph_face (f, face_code) |
7b7739b1 | 841 | struct frame *f; |
7b7739b1 JB |
842 | int face_code; |
843 | { | |
844 | struct face face; | |
845 | ||
660ed669 | 846 | compute_base_face (f, &face); |
7b7739b1 | 847 | |
f211082d JB |
848 | if (face_code >= 0 && face_code < FRAME_N_FACES (f) |
849 | && FRAME_FACES (f) [face_code] != 0) | |
850 | merge_faces (FRAME_FACES (f) [face_code], &face); | |
7b7739b1 | 851 | |
cb637678 | 852 | return intern_frame_face (f, &face); |
c115973b | 853 | } |
660ed669 JB |
854 | |
855 | ||
856 | /* Recompute the GC's for the default and modeline faces. | |
857 | We call this after changing frame parameters on which those GC's | |
858 | depend. */ | |
859 | void | |
860 | recompute_basic_faces (f) | |
861 | FRAME_PTR f; | |
862 | { | |
863 | /* If the frame's faces haven't been initialized yet, don't worry about | |
864 | this stuff. */ | |
865 | if (FRAME_N_FACES (f) < 2) | |
866 | return; | |
867 | ||
868 | BLOCK_INPUT; | |
869 | ||
870 | if (FRAME_DEFAULT_FACE (f)->gc) | |
871 | XFreeGC (x_current_display, FRAME_DEFAULT_FACE (f)->gc); | |
872 | build_face (f, FRAME_DEFAULT_FACE (f)); | |
873 | ||
874 | if (FRAME_MODE_LINE_FACE (f)->gc) | |
875 | XFreeGC (x_current_display, FRAME_MODE_LINE_FACE (f)->gc); | |
876 | build_face (f, FRAME_MODE_LINE_FACE (f)); | |
877 | ||
878 | UNBLOCK_INPUT; | |
879 | } | |
880 | ||
881 | ||
c115973b | 882 | \f |
cb637678 | 883 | /* Lisp interface. */ |
c115973b JB |
884 | |
885 | DEFUN ("frame-face-alist", Fframe_face_alist, Sframe_face_alist, 1, 1, 0, | |
886 | "") | |
887 | (frame) | |
888 | Lisp_Object frame; | |
889 | { | |
890 | CHECK_FRAME (frame, 0); | |
891 | return XFRAME (frame)->face_alist; | |
892 | } | |
893 | ||
894 | DEFUN ("set-frame-face-alist", Fset_frame_face_alist, Sset_frame_face_alist, | |
895 | 2, 2, 0, "") | |
896 | (frame, value) | |
897 | Lisp_Object frame, value; | |
898 | { | |
899 | CHECK_FRAME (frame, 0); | |
900 | XFRAME (frame)->face_alist = value; | |
901 | return value; | |
902 | } | |
903 | ||
904 | ||
905 | DEFUN ("make-face-internal", Fmake_face_internal, Smake_face_internal, 1, 1, 0, | |
906 | "Create face number FACE-ID on all frames.") | |
907 | (face_id) | |
908 | Lisp_Object face_id; | |
909 | { | |
910 | Lisp_Object rest; | |
911 | int id = XINT (face_id); | |
912 | ||
f211082d JB |
913 | CHECK_NUMBER (face_id, 0); |
914 | if (id < 0 || id >= next_face_id) | |
915 | error ("Face id out of range"); | |
c115973b JB |
916 | |
917 | for (rest = Vframe_list; !NILP (rest); rest = XCONS (rest)->cdr) | |
918 | { | |
919 | struct frame *f = XFRAME (XCONS (rest)->car); | |
cb637678 JB |
920 | if (FRAME_X_P (f)) |
921 | ensure_face_ready (f, id); | |
c115973b JB |
922 | } |
923 | return Qnil; | |
924 | } | |
925 | ||
926 | ||
927 | DEFUN ("set-face-attribute-internal", Fset_face_attribute_internal, | |
928 | Sset_face_attribute_internal, 4, 4, 0, "") | |
929 | (face_id, attr_name, attr_value, frame) | |
930 | Lisp_Object face_id, attr_name, attr_value, frame; | |
931 | { | |
932 | struct face *face; | |
933 | struct frame *f; | |
934 | int magic_p; | |
935 | int id; | |
936 | ||
937 | CHECK_FRAME (frame, 0); | |
f211082d | 938 | CHECK_NUMBER (face_id, 0); |
c115973b JB |
939 | CHECK_SYMBOL (attr_name, 0); |
940 | ||
941 | f = XFRAME (frame); | |
942 | id = XINT (face_id); | |
f211082d JB |
943 | if (id < 0 || id >= next_face_id) |
944 | error ("Face id out of range"); | |
c115973b | 945 | |
b6d40e46 JB |
946 | if (! FRAME_X_P (f)) |
947 | return; | |
948 | ||
c115973b | 949 | ensure_face_ready (f, id); |
f211082d | 950 | face = FRAME_FACES (f) [XFASTINT (face_id)]; |
c115973b JB |
951 | |
952 | if (EQ (attr_name, intern ("font"))) | |
953 | { | |
f211082d | 954 | XFontStruct *font = load_font (f, attr_value); |
ebc64af3 RS |
955 | if (face->font != f->display.x->font) |
956 | unload_font (f, face->font); | |
c115973b | 957 | face->font = font; |
c115973b JB |
958 | } |
959 | else if (EQ (attr_name, intern ("foreground"))) | |
960 | { | |
f211082d | 961 | unsigned long new_color = load_color (f, attr_value); |
c115973b JB |
962 | unload_color (f, face->foreground); |
963 | face->foreground = new_color; | |
c115973b JB |
964 | } |
965 | else if (EQ (attr_name, intern ("background"))) | |
966 | { | |
f211082d | 967 | unsigned long new_color = load_color (f, attr_value); |
c115973b JB |
968 | unload_color (f, face->background); |
969 | face->background = new_color; | |
c115973b JB |
970 | } |
971 | #if 0 | |
972 | else if (EQ (attr_name, intern ("background-pixmap"))) | |
973 | { | |
c115973b JB |
974 | unsigned int w, h, d; |
975 | unsigned long new_pixmap = load_pixmap (f, attr_value, &w, &h, &d, 0); | |
f211082d JB |
976 | unload_pixmap (f, face->stipple); |
977 | if (NILP (attr_value)) | |
978 | new_pixmap = 0; | |
979 | face->stipple = new_pixmap; | |
c115973b JB |
980 | face->pixmap_w = w; |
981 | face->pixmap_h = h; | |
982 | /* face->pixmap_depth = d; */ | |
c115973b JB |
983 | } |
984 | #endif /* 0 */ | |
985 | else if (EQ (attr_name, intern ("underline"))) | |
986 | { | |
987 | int new = !NILP (attr_value); | |
988 | face->underline = new; | |
989 | } | |
990 | else | |
991 | error ("unknown face attribute"); | |
992 | ||
993 | if (id == 0) | |
994 | { | |
995 | BLOCK_INPUT; | |
660ed669 | 996 | if (FRAME_DEFAULT_FACE (f)->gc != 0) |
f211082d JB |
997 | XFreeGC (x_current_display, FRAME_DEFAULT_FACE (f)->gc); |
998 | build_face (f, FRAME_DEFAULT_FACE (f)); | |
c115973b JB |
999 | UNBLOCK_INPUT; |
1000 | } | |
1001 | ||
1002 | if (id == 1) | |
1003 | { | |
1004 | BLOCK_INPUT; | |
660ed669 | 1005 | if (FRAME_MODE_LINE_FACE (f)->gc != 0) |
f211082d JB |
1006 | XFreeGC (x_current_display, FRAME_MODE_LINE_FACE (f)->gc); |
1007 | build_face (f, FRAME_MODE_LINE_FACE (f)); | |
c115973b JB |
1008 | UNBLOCK_INPUT; |
1009 | } | |
1010 | ||
584d0634 JB |
1011 | /* If we're modifying either of the frame's display faces, that |
1012 | means that we're changing the parameters of a fixed face code; | |
1013 | since the color/font/whatever is changed but the face ID hasn't, | |
1014 | redisplay won't know to redraw the affected sections. Give it a | |
1015 | kick. */ | |
1016 | if (id == 0 || id == 1) | |
1017 | SET_FRAME_GARBAGED (f); | |
1018 | else | |
1019 | /* Otherwise, it's enough to tell it to redisplay the text. */ | |
1020 | windows_or_buffers_changed = 1; | |
1021 | ||
c115973b JB |
1022 | return Qnil; |
1023 | } | |
1024 | ||
1025 | DEFUN ("internal-next-face-id", Finternal_next_face_id, Sinternal_next_face_id, | |
1026 | 0, 0, 0, "") | |
1027 | () | |
1028 | { | |
1029 | return make_number (next_face_id++); | |
1030 | } | |
f211082d JB |
1031 | |
1032 | /* Return the face id for name NAME on frame FRAME. | |
1033 | (It should be the same for all frames, | |
1034 | but it's as easy to use the "right" frame to look it up | |
1035 | as to use any other one.) */ | |
1036 | ||
1d9fd7fe JB |
1037 | int |
1038 | face_name_id_number (f, name) | |
1039 | FRAME_PTR f; | |
1040 | Lisp_Object name; | |
f211082d JB |
1041 | { |
1042 | Lisp_Object tem; | |
1043 | ||
1d9fd7fe | 1044 | tem = Fcdr (Fassq (name, f->face_alist)); |
b6d40e46 JB |
1045 | if (NILP (tem)) |
1046 | return 0; | |
f211082d JB |
1047 | CHECK_VECTOR (tem, 0); |
1048 | tem = XVECTOR (tem)->contents[2]; | |
1049 | CHECK_NUMBER (tem, 0); | |
1050 | return XINT (tem); | |
1051 | } | |
c115973b | 1052 | \f |
cb637678 JB |
1053 | /* Emacs initialization. */ |
1054 | ||
c115973b | 1055 | void |
f211082d | 1056 | syms_of_xfaces () |
c115973b | 1057 | { |
f211082d JB |
1058 | Qwindow = intern ("window"); |
1059 | staticpro (&Qwindow); | |
1060 | Qface = intern ("face"); | |
1061 | staticpro (&Qface); | |
1062 | Qpriority = intern ("priority"); | |
1063 | staticpro (&Qpriority); | |
1064 | ||
bc0db68d RS |
1065 | DEFVAR_INT ("region-face", ®ion_face, |
1066 | "Face number to use to highlight the region\n\ | |
1067 | The region is highlighted with this face\n\ | |
1068 | when Transient Mark mode is enabled and the mark is active."); | |
1069 | ||
c115973b JB |
1070 | defsubr (&Sframe_face_alist); |
1071 | defsubr (&Sset_frame_face_alist); | |
1072 | defsubr (&Smake_face_internal); | |
1073 | defsubr (&Sset_face_attribute_internal); | |
1074 | defsubr (&Sinternal_next_face_id); | |
1075 | } | |
cb637678 JB |
1076 | |
1077 | #endif /* HAVE_X_WINDOWS */ | |
1078 |