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annotate src/faces.h @ 5126:2a462149bd6a ben-lisp-object
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| author | Ben Wing <ben@xemacs.org> |
|---|---|
| date | Wed, 24 Feb 2010 19:04:27 -0600 |
| parents | b5df3737028a 07dcc7000bbf |
| children | a9c41067dd88 |
| rev | line source |
|---|---|
| 428 | 1 /* Face data structures. |
| 2 Copyright (C) 1995 Board of Trustees, University of Illinois. | |
| 5043 | 3 Copyright (C) 1995, 2002, 2010 Ben Wing |
| 428 | 4 |
| 5 This file is part of XEmacs. | |
| 6 | |
| 7 XEmacs is free software; you can redistribute it and/or modify it | |
| 8 under the terms of the GNU General Public License as published by the | |
| 9 Free Software Foundation; either version 2, or (at your option) any | |
| 10 later version. | |
| 11 | |
| 12 XEmacs is distributed in the hope that it will be useful, but WITHOUT | |
| 13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 15 for more details. | |
| 16 | |
| 17 You should have received a copy of the GNU General Public License | |
| 18 along with XEmacs; see the file COPYING. If not, write to | |
| 19 the Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
| 20 Boston, MA 02111-1307, USA. */ | |
| 21 | |
| 22 /* Synched up with: Not in FSF. */ | |
| 23 | |
| 440 | 24 #ifndef INCLUDED_faces_h_ |
| 25 #define INCLUDED_faces_h_ | |
| 428 | 26 |
| 771 | 27 #include "charset.h" /* for NUM_LEADING_BYTES */ |
| 3659 | 28 #include "specifier.h" |
| 428 | 29 |
| 440 | 30 /* a Lisp_Face is the C object corresponding to a face. There is one |
| 31 of these per face. It basically contains all of the specifiers for | |
| 32 the built-in face properties, plus the plist of user-specified | |
| 428 | 33 properties. */ |
| 34 | |
| 35 struct Lisp_Face | |
| 36 { | |
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37 LISP_OBJECT_HEADER header; |
| 428 | 38 |
| 39 Lisp_Object name; | |
| 40 Lisp_Object doc_string; | |
| 41 unsigned int dirty :1; /* Set whenever a face property is changed on | |
| 42 a face. */ | |
| 43 | |
| 44 Lisp_Object foreground; | |
| 45 Lisp_Object background; | |
| 46 Lisp_Object font; | |
| 47 | |
| 48 Lisp_Object display_table; | |
| 49 Lisp_Object background_pixmap; | |
| 50 | |
| 51 Lisp_Object underline; | |
| 52 Lisp_Object strikethru; | |
| 53 Lisp_Object highlight; | |
| 54 Lisp_Object dim; | |
| 55 Lisp_Object blinking; | |
| 56 Lisp_Object reverse; | |
| 57 | |
| 58 Lisp_Object plist; | |
| 59 | |
| 60 Lisp_Object charsets_warned_about; | |
| 61 }; | |
| 62 | |
| 63 /* | |
| 64 | |
| 65 A face cache element caches the results of instantiating the | |
| 66 properties of a face in a particular window. (Instantiation can | |
| 67 take a long time so this is very important.) Each window contains | |
| 68 an array of face cache elements (called the "face cache"), one for | |
| 69 each face that has been seen in the window so far. | |
| 70 | |
| 71 Some tricky stuff is done to make sure the face cache does not | |
| 72 become inconsistent: | |
| 73 | |
| 74 1) Switching buffers in a window clears the face cache for that | |
| 75 window, because this can change the way any property is | |
| 76 instantiated in the window. | |
| 77 2) Setting a face property causes that face to be marked as | |
| 78 dirty. This causes various stuff to happen to make sure | |
| 79 the appropriate face cache elements are invalidated. | |
| 80 (#### Actually this doesn't work quite right, and errs | |
| 81 too much on the side of invalidating unnecessary stuff.) | |
| 82 | |
| 83 There are also face cache elements for "merged faces", which are the | |
| 84 result of merging all the faces that overlap a particular buffer | |
| 85 position. The merging is always done in the context of a particular | |
| 86 domain (specifically, a window), and the face cache element is | |
| 87 specific to a particular window. (Face cache elements are contained | |
| 88 in an array that is attached to each struct_window.) The reason that | |
| 89 the merging takes place in the context of a particular window has | |
| 90 to do with the way the merging works: | |
| 91 | |
| 92 1) All extents overlying the buffer position are sorted by descending | |
| 93 priority. | |
| 94 2) The property of a particular merged face comes from the highest- | |
| 95 priority face that specifies a value for that particular property. | |
| 96 3) The way to determine whether a face specifies a value for a | |
| 97 particular property is to instantiate that face's property in | |
| 98 the window in question with the no-fallback option set, to | |
| 99 see if we got anything. | |
| 100 | |
| 101 For Mule, things get a bit trickier because there can be multiple | |
| 102 fonts per face/window combination -- the charset is an argument | |
| 103 to specifier-instance. | |
| 104 | |
| 105 We have two possible data structure representations: | |
| 106 | |
| 107 1) Keep the original "one font per face cache element" representation | |
| 108 and use a different face cache element for each charset. | |
| 109 2) Allow multiple fonts to be in a single face cache element. | |
| 110 | |
| 111 I've chosen to use (2) -- the data structure gets more complicated | |
| 112 but the algorithms for maintaining face cache elements end up | |
| 113 simpler. | |
| 114 */ | |
| 115 | |
| 116 #define NUM_STATIC_CACHEL_FACES 4 | |
| 117 | |
| 118 typedef struct face_cachel face_cachel; | |
| 119 struct face_cachel | |
| 120 { | |
| 3092 | 121 #ifdef NEW_GC |
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122 LISP_OBJECT_HEADER header; |
| 3263 | 123 #endif /* NEW_GC */ |
| 428 | 124 /* There are two kinds of cachels; those created from a single face |
| 125 and those created by merging more than one face. In the former | |
| 126 case, the FACE element specifies the face used. In the latter | |
| 127 case, the MERGED_FACES_STATIC and MERGED_FACES elements specify | |
| 128 the faces used for merging by giving the indices of the | |
| 129 corresponding single-face cachels. | |
| 130 | |
| 131 Formerly we didn't bother to keep track of the faces used for | |
| 442 | 132 merging. We do now because we need to do so because there is no |
| 428 | 133 other way to properly handle multiple charsets for Mule in the |
| 134 presence of display tables short of always computing the values | |
| 135 for all charsets, which is very expensive. Instead, we use a | |
| 136 lazy scheme where we only compute the font for a particular charset | |
| 137 when it is needed. (The exception is the font for the ASCII charset. | |
| 138 We always compute it, just like the other attributes, because | |
| 139 many places in the C code refer to the font of the ASCII charset | |
| 140 and expect it to always be there.) | |
| 141 | |
| 142 We store the first four faces in a static array, and use a | |
| 143 Dynarr for the rest. This has the advantage that the space used | |
| 144 is small but the Dynarr will almost never be created, so we | |
| 145 won't spend much time in malloc()/free(). | |
| 146 | |
| 147 The order of the faces here is decreasing extent priority. */ | |
| 148 Lisp_Object face; | |
| 149 int merged_faces_static[NUM_STATIC_CACHEL_FACES]; | |
| 150 int_dynarr *merged_faces; | |
| 151 int nfaces; | |
| 152 | |
| 153 /* The values stored here are computed by calling specifier_instance() | |
| 154 on the appropriate specifiers. This means that we will have either | |
| 155 a value computed from the face itself or a value computed from the | |
| 156 default face. We need to distinguish the two so that merging works | |
| 157 properly -- a value that comes from the default face is treated | |
| 158 as "unspecified" during merging and is overridden by lower-priority | |
| 159 faces. This is what the _specified flags below are for. */ | |
| 160 | |
| 161 Lisp_Object foreground; | |
| 162 Lisp_Object background; | |
| 771 | 163 /* There are currently 128 or 129 possible charsets under Mule. For the |
| 428 | 164 moment we just take the easy way out and allocate space for each |
| 165 of them. This avoids messing with Dynarrs. | |
| 166 | |
| 167 #### We should look into this and probably clean it up | |
| 3094 | 168 to use Dynarrs. This may be a big space hog as is. |
| 169 sjt sez: doesn't look like it, my total face cache is 170KB. | |
| 170 Could be reduced to maybe 50KB. */ | |
| 428 | 171 Lisp_Object font[NUM_LEADING_BYTES]; |
| 172 | |
| 173 Lisp_Object display_table; | |
| 174 Lisp_Object background_pixmap; | |
| 175 | |
| 176 unsigned int underline :1; | |
| 177 unsigned int strikethru :1; | |
| 178 unsigned int highlight :1; | |
| 179 unsigned int dim :1; | |
| 180 unsigned int blinking :1; | |
| 181 unsigned int reverse :1; | |
| 182 | |
| 183 /* Used when merging to tell if the above field represents an actual | |
| 184 value of this face or a fallback value. */ | |
| 3659 | 185 DECLARE_INLINE_LISP_BIT_VECTOR(NUM_LEADING_BYTES) font_specified; |
| 186 | |
| 428 | 187 unsigned int foreground_specified :1; |
| 188 unsigned int background_specified :1; | |
| 189 unsigned int display_table_specified :1; | |
| 190 unsigned int background_pixmap_specified :1; | |
| 191 | |
| 192 unsigned int strikethru_specified :1; | |
| 193 unsigned int underline_specified :1; | |
| 194 unsigned int highlight_specified :1; | |
| 195 unsigned int dim_specified :1; | |
| 196 unsigned int blinking_specified :1; | |
| 197 unsigned int reverse_specified :1; | |
| 198 | |
| 199 /* The updated flag is set after we calculate the values for the | |
| 200 face cachel and cleared whenever a face changes, to indicate | |
| 201 that the values stored here might be wrong. The next time | |
| 202 we go to access the values, we recompute them; if any values | |
| 203 change, we set the DIRTY flag, which tells the output routines | |
| 204 that a face value has in fact changed and the sections of text | |
| 205 using this face need to be redrawn. | |
| 206 | |
| 207 It is trickier with fonts because we don't automatically | |
| 208 recompute the fonts but do it only when it is necessary. | |
| 209 (The ASCII font is an exception, of course; see above). | |
| 210 | |
| 211 In the case of fonts, we maintain a separate updated flag | |
| 212 for each font. Whenever we need to access the font for | |
| 213 a particular charset, we recalculate it if either its | |
| 214 value is Qunbound (meaning it's never been computed at all) | |
| 215 or the updated flag is not set. We set the dirty flag if | |
| 216 the value is not the same as before and the previous value | |
| 217 was not Qunbound. | |
| 218 | |
| 219 #### Note that we don't yet deal with the case of the new | |
| 220 value being Qunbound, as could happen if no fonts of the | |
| 221 right sort are available on the system. In this case, the | |
| 222 whole program will just crash. For the moment, this is | |
| 223 OK (for debugging purposes) but we should fix this by | |
| 224 storing a "blank font" if the instantiation fails. */ | |
| 225 unsigned int dirty :1; | |
| 226 unsigned int updated :1; | |
| 3659 | 227 |
| 228 DECLARE_INLINE_LISP_BIT_VECTOR(NUM_LEADING_BYTES) font_updated; | |
| 229 | |
| 230 /* Whether the font for the charset in question was determined in the | |
| 231 "final stage"; that is, the last stage Lisp code could specify it, | |
| 232 after the initial stage and before the fallback. */ | |
| 233 DECLARE_INLINE_LISP_BIT_VECTOR(NUM_LEADING_BYTES) font_final_stage; | |
| 428 | 234 }; |
| 235 | |
| 3092 | 236 #ifdef NEW_GC |
| 237 typedef struct face_cachel Lisp_Face_Cachel; | |
| 238 | |
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239 DECLARE_LISP_OBJECT (face_cachel, Lisp_Face_Cachel); |
| 3092 | 240 |
| 241 #define XFACE_CACHEL(x) \ | |
| 242 XRECORD (x, face_cachel, Lisp_Face_Cachel) | |
| 243 #define wrap_face_cachel(p) wrap_record (p, face_cachel) | |
| 244 #define FACE_CACHEL_P(x) RECORDP (x, face_cachel) | |
| 245 #define CHECK_FACE_CACHEL(x) CHECK_RECORD (x, face_cachel) | |
| 246 #define CONCHECK_FACE_CACHEL(x) CONCHECK_RECORD (x, face_cachel) | |
| 247 #endif /* NEW_GC */ | |
| 248 | |
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249 DECLARE_LISP_OBJECT (face, Lisp_Face); |
| 440 | 250 #define XFACE(x) XRECORD (x, face, Lisp_Face) |
| 617 | 251 #define wrap_face(p) wrap_record (p, face) |
| 428 | 252 #define FACEP(x) RECORDP (x, face) |
| 253 #define CHECK_FACE(x) CHECK_RECORD (x, face) | |
| 254 | |
| 255 Lisp_Object ensure_face_cachel_contains_charset (struct face_cachel *cachel, | |
| 256 Lisp_Object domain, | |
| 257 Lisp_Object charset); | |
| 258 void ensure_face_cachel_complete (struct face_cachel *cachel, | |
| 259 Lisp_Object domain, | |
| 260 unsigned char *charsets); | |
| 261 void update_face_cachel_data (struct face_cachel *cachel, | |
| 262 Lisp_Object domain, | |
| 263 Lisp_Object face); | |
| 264 void face_cachel_charset_font_metric_info (struct face_cachel *cachel, | |
| 265 unsigned char *charsets, | |
| 266 struct font_metric_info *fm); | |
| 267 void mark_face_cachels (face_cachel_dynarr *elements); | |
| 268 void mark_face_cachels_as_clean (struct window *w); | |
| 269 void mark_face_cachels_as_not_updated (struct window *w); | |
| 270 void reset_face_cachel (struct face_cachel *inst); | |
| 271 void reset_face_cachels (struct window *w); | |
| 272 face_index get_builtin_face_cache_index (struct window *w, | |
| 273 Lisp_Object face); | |
| 3094 | 274 /* WARNING: this interface may change. */ |
| 275 face_index merge_face_list_to_cache_index (struct window *w, | |
| 276 Lisp_Object *face_list, int count); | |
| 277 | |
| 428 | 278 #ifdef MEMORY_USAGE_STATS |
| 279 int compute_face_cachel_usage (face_cachel_dynarr *face_cachels, | |
| 280 struct overhead_stats *ovstats); | |
| 281 #endif /* MEMORY_USAGE_STATS */ | |
| 282 | |
| 283 EXFUN (Fface_name, 1); | |
| 284 EXFUN (Ffind_face, 1); | |
| 285 EXFUN (Fget_face, 1); | |
| 286 | |
| 287 extern Lisp_Object Qstrikethru, Vbuilt_in_face_specifiers, Vdefault_face; | |
| 288 extern Lisp_Object Vleft_margin_face, Vpointer_face, Vright_margin_face; | |
| 432 | 289 extern Lisp_Object Vtext_cursor_face, Vvertical_divider_face; |
| 428 | 290 extern Lisp_Object Vtoolbar_face, Vgui_element_face, Vwidget_face; |
| 291 | |
| 292 void mark_all_faces_as_clean (void); | |
| 293 void init_frame_faces (struct frame *f); | |
| 294 void init_device_faces (struct device *d); | |
| 295 void init_global_faces (struct device *d); | |
| 296 face_index get_extent_fragment_face_cache_index (struct window *w, | |
| 297 struct extent_fragment *ef); | |
| 298 void update_frame_face_values (struct frame *f); | |
| 299 void face_property_was_changed (Lisp_Object face, Lisp_Object property, | |
| 300 Lisp_Object locale); | |
| 301 void default_face_font_info (Lisp_Object domain, int *ascent, | |
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302 int *descent, int *width, int *height, |
| 428 | 303 int *proportional_p); |
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304 void default_face_width_and_height (Lisp_Object domain, int *width, |
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305 int *height); |
| 428 | 306 |
| 307 #define FACE_CACHEL_FONT(cachel, charset) \ | |
| 771 | 308 (cachel->font[XCHARSET_LEADING_BYTE (charset) - MIN_LEADING_BYTE]) |
| 428 | 309 |
| 3659 | 310 #define FACE_CACHEL_FONT_UPDATED(x) \ |
| 311 ((struct Lisp_Bit_Vector *)(&((x)->font_updated))) | |
| 312 #define FACE_CACHEL_FONT_SPECIFIED(x) \ | |
| 313 ((struct Lisp_Bit_Vector *)(&((x)->font_specified))) | |
| 314 #define FACE_CACHEL_FONT_FINAL_STAGE(x) \ | |
| 315 ((struct Lisp_Bit_Vector *)(&((x)->font_final_stage))) | |
| 316 | |
| 428 | 317 #define WINDOW_FACE_CACHEL(window, index) \ |
| 318 Dynarr_atp ((window)->face_cachels, index) | |
| 319 | |
| 320 #define FACE_CACHEL_FINDEX_UNSAFE(cachel, offset) \ | |
| 321 ((offset) < NUM_STATIC_CACHEL_FACES \ | |
| 322 ? (cachel)->merged_faces_static[offset] \ | |
| 323 : Dynarr_at ((cachel)->merged_faces, (offset) - NUM_STATIC_CACHEL_FACES)) | |
| 324 | |
| 325 #define WINDOW_FACE_CACHEL_FACE(window, index) \ | |
| 326 (WINDOW_FACE_CACHEL (window, index)->face) | |
| 327 #define WINDOW_FACE_CACHEL_FOREGROUND(window, index) \ | |
| 328 (WINDOW_FACE_CACHEL (window, index)->foreground) | |
| 329 #define WINDOW_FACE_CACHEL_BACKGROUND(window, index) \ | |
| 330 (WINDOW_FACE_CACHEL (window, index)->background) | |
| 331 /* #### This can be referenced by various functions, | |
| 332 but face_cachels isn't initialized for the stream device. | |
| 333 Since it doesn't need the value we just return nil here to avoid | |
| 334 blowing up in multiple places. */ | |
| 335 #define WINDOW_FACE_CACHEL_FONT(window, index, charset) \ | |
| 336 ((window)->face_cachels \ | |
| 337 ? FACE_CACHEL_FONT (WINDOW_FACE_CACHEL (window, index), charset) \ | |
| 338 : Qnil) | |
| 339 #define WINDOW_FACE_CACHEL_DISPLAY_TABLE(window, index) \ | |
| 340 (WINDOW_FACE_CACHEL (window, index)->display_table) | |
| 341 #define WINDOW_FACE_CACHEL_BACKGROUND_PIXMAP(window, index) \ | |
| 342 (WINDOW_FACE_CACHEL (window, index)->background_pixmap) | |
| 343 #define WINDOW_FACE_CACHEL_DIRTY(window, index) \ | |
| 344 (WINDOW_FACE_CACHEL (window, index)->dirty) | |
| 345 #define WINDOW_FACE_CACHEL_UNDERLINE_P(window, index) \ | |
| 346 (WINDOW_FACE_CACHEL (window, index)->underline) | |
| 347 #define WINDOW_FACE_CACHEL_HIGHLIGHT_P(window, index) \ | |
| 348 (WINDOW_FACE_CACHEL (window, index)->highlight) | |
| 349 #define WINDOW_FACE_CACHEL_DIM_P(window, index) \ | |
| 350 (WINDOW_FACE_CACHEL (window, index)->dim) | |
| 351 #define WINDOW_FACE_CACHEL_BLINKING_P(window, index) \ | |
| 352 (WINDOW_FACE_CACHEL (window, index)->blinking) | |
| 353 #define WINDOW_FACE_CACHEL_REVERSE_P(window, index) \ | |
| 354 (WINDOW_FACE_CACHEL (window, index)->reverse) | |
| 355 | |
| 356 #define FACE_PROPERTY_SPECIFIER(face, property) Fget (face, property, Qnil) | |
| 357 | |
| 358 #define FACE_PROPERTY_INSTANCE_1(face, property, domain, errb, no_fallback, depth) \ | |
| 359 specifier_instance (FACE_PROPERTY_SPECIFIER (face, property), Qunbound, \ | |
| 360 domain, errb, 1, no_fallback, depth) | |
| 361 | |
| 362 #define FACE_PROPERTY_INSTANCE(face, property, domain, no_fallback, depth) \ | |
| 793 | 363 FACE_PROPERTY_INSTANCE_1 (face, property, domain, ERROR_ME_DEBUG_WARN, \ |
| 428 | 364 no_fallback, depth) |
| 365 | |
| 3659 | 366 Lisp_Object face_property_matching_instance |
| 367 (Lisp_Object face, | |
| 368 Lisp_Object property, | |
| 369 Lisp_Object charset, | |
| 370 Lisp_Object domain, | |
| 371 Error_Behavior errb, | |
| 372 int no_fallback, | |
| 373 Lisp_Object depth, | |
| 374 enum font_specifier_matchspec_stages stages); | |
| 428 | 375 |
| 376 #define FACE_PROPERTY_SPEC_LIST(face, property, locale) \ | |
| 377 Fspecifier_spec_list (FACE_PROPERTY_SPECIFIER (face, property), \ | |
| 378 locale, Qnil, Qnil) | |
| 498 | 379 #define SET_FACE_PROPERTY(face, property, value, locale, tag, how_to_add) \ |
| 428 | 380 Fadd_spec_to_specifier (FACE_PROPERTY_SPECIFIER (face, property), \ |
| 498 | 381 value, locale, tag, how_to_add) |
| 428 | 382 |
| 383 #define FACE_FOREGROUND(face, domain) \ | |
| 384 FACE_PROPERTY_INSTANCE (face, Qforeground, domain, 0, Qzero) | |
| 385 #define FACE_BACKGROUND(face, domain) \ | |
| 386 FACE_PROPERTY_INSTANCE (face, Qbackground, domain, 0, Qzero) | |
| 3676 | 387 |
| 388 /* Calling this function on the default face with the ASCII character set | |
| 389 may delete any X11 frames; see the code at the end of | |
| 390 x_find_charset_font. */ | |
| 428 | 391 #define FACE_FONT(face, domain, charset) \ |
| 392 face_property_matching_instance (face, Qfont, charset, domain, \ | |
| 3659 | 393 ERROR_ME_DEBUG_WARN, 0, Qzero, \ |
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394 STAGE_INITIAL) |
| 428 | 395 #define FACE_DISPLAY_TABLE(face, domain) \ |
| 396 FACE_PROPERTY_INSTANCE (face, Qdisplay_table, domain, 0, Qzero) | |
| 397 #define FACE_BACKGROUND_PIXMAP(face, domain) \ | |
| 398 FACE_PROPERTY_INSTANCE (face, Qbackground_pixmap, domain, 0, Qzero) | |
| 399 #define FACE_UNDERLINE_P(face, domain) \ | |
| 400 (!NILP (FACE_PROPERTY_INSTANCE (face, Qunderline, domain, 0, Qzero))) | |
| 440 | 401 #define FACE_STRIKETHRU_P(face, domain) \ |
| 402 (!NILP (FACE_PROPERTY_INSTANCE (face, Qstrikethru, domain, 0, Qzero))) | |
| 428 | 403 #define FACE_HIGHLIGHT_P(face, domain) \ |
| 404 (!NILP (FACE_PROPERTY_INSTANCE (face, Qhighlight, domain, 0, Qzero))) | |
| 405 #define FACE_DIM_P(face, domain) \ | |
| 406 (!NILP (FACE_PROPERTY_INSTANCE (face, Qdim, domain, 0, Qzero))) | |
| 407 #define FACE_BLINKING_P(face, domain) \ | |
| 408 (!NILP (FACE_PROPERTY_INSTANCE (face, Qblinking, domain, 0, Qzero))) | |
| 409 #define FACE_REVERSE_P(face, domain) \ | |
| 410 (!NILP (FACE_PROPERTY_INSTANCE (face, Qreverse, domain, 0, Qzero))) | |
| 411 | |
| 440 | 412 #endif /* INCLUDED_faces_h_ */ |