Pileus Git - ~andy/gtk/blob - gtk/gtkcsscomputedvalues.c

   1 /*
   2  * Copyright © 2012 Red Hat Inc.
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2.1 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with this library. If not, see <http://www.gnu.org/licenses/>.
  16  *
  17  * Authors: Benjamin Otte <otte@gnome.org>
  18  */
  19
  20 #include "config.h"
  21
  22 #include "gtkprivate.h"
  23 #include "gtkcsscomputedvaluesprivate.h"
  24
  25 #include "gtkcssanimationprivate.h"
  26 #include "gtkcssarrayvalueprivate.h"
  27 #include "gtkcssenumvalueprivate.h"
  28 #include "gtkcssinheritvalueprivate.h"
  29 #include "gtkcssinitialvalueprivate.h"
  30 #include "gtkcssnumbervalueprivate.h"
  31 #include "gtkcssshorthandpropertyprivate.h"
  32 #include "gtkcssstringvalueprivate.h"
  33 #include "gtkcssstylepropertyprivate.h"
  34 #include "gtkcsstransitionprivate.h"
  35 #include "gtkstyleanimationprivate.h"
  36 #include "gtkstylepropertiesprivate.h"
  37 #include "gtkstylepropertyprivate.h"
  38 #include "gtkstyleproviderprivate.h"
  39
  40 G_DEFINE_TYPE (GtkCssComputedValues, _gtk_css_computed_values, G_TYPE_OBJECT)
  41
  42 static void
  43 gtk_css_computed_values_dispose (GObject *object)
  44 {
  45   GtkCssComputedValues *values = GTK_CSS_COMPUTED_VALUES (object);
  46
  47   if (values->values)
  48     {
  49       g_ptr_array_unref (values->values);
  50       values->values = NULL;
  51     }
  52   if (values->sections)
  53     {
  54       g_ptr_array_unref (values->sections);
  55       values->sections = NULL;
  56     }
  57   if (values->animated_values)
  58     {
  59       g_ptr_array_unref (values->animated_values);
  60       values->animated_values = NULL;
  61     }
  62
  63   g_slist_free_full (values->animations, g_object_unref);
  64   values->animations = NULL;
  65
  66   G_OBJECT_CLASS (_gtk_css_computed_values_parent_class)->dispose (object);
  67 }
  68
  69 static void
  70 gtk_css_computed_values_finalize (GObject *object)
  71 {
  72   GtkCssComputedValues *values = GTK_CSS_COMPUTED_VALUES (object);
  73
  74   _gtk_bitmask_free (values->depends_on_parent);
  75   _gtk_bitmask_free (values->equals_parent);
  76   _gtk_bitmask_free (values->depends_on_color);
  77   _gtk_bitmask_free (values->depends_on_font_size);
  78
  79   G_OBJECT_CLASS (_gtk_css_computed_values_parent_class)->finalize (object);
  80 }
  81
  82 static void
  83 _gtk_css_computed_values_class_init (GtkCssComputedValuesClass *klass)
  84 {
  85   GObjectClass *object_class = G_OBJECT_CLASS (klass);
  86
  87   object_class->dispose = gtk_css_computed_values_dispose;
  88   object_class->finalize = gtk_css_computed_values_finalize;
  89 }
  90
  91 static void
  92 _gtk_css_computed_values_init (GtkCssComputedValues *values)
  93 {
  94   values->depends_on_parent = _gtk_bitmask_new ();
  95   values->equals_parent = _gtk_bitmask_new ();
  96   values->depends_on_color = _gtk_bitmask_new ();
  97   values->depends_on_font_size = _gtk_bitmask_new ();
  98 }
  99
 100 GtkCssComputedValues *
 101 _gtk_css_computed_values_new (void)
 102 {
 103   return g_object_new (GTK_TYPE_CSS_COMPUTED_VALUES, NULL);
 104 }
 105
 106 static void
 107 maybe_unref_section (gpointer section)
 108 {
 109   if (section)
 110     gtk_css_section_unref (section);
 111 }
 112
 113 void
 114 _gtk_css_computed_values_compute_value (GtkCssComputedValues    *values,
 115                                         GtkStyleProviderPrivate *provider,
 116                                         GtkCssComputedValues    *parent_values,
 117                                         guint                    id,
 118                                         GtkCssValue             *specified,
 119                                         GtkCssSection           *section)
 120 {
 121   GtkCssDependencies dependencies;
 122   GtkCssValue *value;
 123
 124   gtk_internal_return_if_fail (GTK_IS_CSS_COMPUTED_VALUES (values));
 125   gtk_internal_return_if_fail (GTK_IS_STYLE_PROVIDER_PRIVATE (provider));
 126   gtk_internal_return_if_fail (parent_values == NULL || GTK_IS_CSS_COMPUTED_VALUES (parent_values));
 127
 128   /* http://www.w3.org/TR/css3-cascade/#cascade
 129    * Then, for every element, the value for each property can be found
 130    * by following this pseudo-algorithm:
 131    * 1) Identify all declarations that apply to the element
 132    */
 133   if (specified == NULL)
 134     {
 135       GtkCssStyleProperty *prop = _gtk_css_style_property_lookup_by_id (id);
 136
 137       if (_gtk_css_style_property_is_inherit (prop))
 138         specified = _gtk_css_inherit_value_new ();
 139       else
 140         specified = _gtk_css_initial_value_new ();
 141     }
 142   else
 143     _gtk_css_value_ref (specified);
 144
 145   value = _gtk_css_value_compute (specified, id, provider, values, parent_values, &dependencies);
 146
 147   _gtk_css_computed_values_set_value (values, id, value, dependencies, section);
 148
 149   _gtk_css_value_unref (value);
 150   _gtk_css_value_unref (specified);
 151 }
 152
 153 void
 154 _gtk_css_computed_values_set_animated_value (GtkCssComputedValues *values,
 155                                              guint                 id,
 156                                              GtkCssValue          *value)
 157 {
 158   gtk_internal_return_if_fail (GTK_IS_CSS_COMPUTED_VALUES (values));
 159   gtk_internal_return_if_fail (value != NULL);
 160
 161   if (values->animated_values == NULL)
 162     values->animated_values = g_ptr_array_new_with_free_func ((GDestroyNotify)_gtk_css_value_unref);
 163   if (id >= values->animated_values->len)
 164    g_ptr_array_set_size (values->animated_values, id + 1);
 165
 166   if (g_ptr_array_index (values->animated_values, id))
 167     _gtk_css_value_unref (g_ptr_array_index (values->animated_values, id));
 168   g_ptr_array_index (values->animated_values, id) = _gtk_css_value_ref (value);
 169
 170 }
 171
 172 void
 173 _gtk_css_computed_values_set_value (GtkCssComputedValues *values,
 174                                     guint                 id,
 175                                     GtkCssValue          *value,
 176                                     GtkCssDependencies    dependencies,
 177                                     GtkCssSection        *section)
 178 {
 179   gtk_internal_return_if_fail (GTK_IS_CSS_COMPUTED_VALUES (values));
 180
 181   if (values->values == NULL)
 182     values->values = g_ptr_array_new_with_free_func ((GDestroyNotify)_gtk_css_value_unref);
 183   if (id >= values->values->len)
 184    g_ptr_array_set_size (values->values, id + 1);
 185
 186   if (g_ptr_array_index (values->values, id))
 187     _gtk_css_value_unref (g_ptr_array_index (values->values, id));
 188   g_ptr_array_index (values->values, id) = _gtk_css_value_ref (value);
 189
 190   if (dependencies & (GTK_CSS_DEPENDS_ON_PARENT | GTK_CSS_EQUALS_PARENT))
 191     values->depends_on_parent = _gtk_bitmask_set (values->depends_on_parent, id, TRUE);
 192   if (dependencies & (GTK_CSS_EQUALS_PARENT))
 193     values->equals_parent = _gtk_bitmask_set (values->equals_parent, id, TRUE);
 194   if (dependencies & (GTK_CSS_DEPENDS_ON_COLOR))
 195     values->depends_on_color = _gtk_bitmask_set (values->depends_on_color, id, TRUE);
 196   if (dependencies & (GTK_CSS_DEPENDS_ON_FONT_SIZE))
 197     values->depends_on_font_size = _gtk_bitmask_set (values->depends_on_font_size, id, TRUE);
 198
 199   if (values->sections && values->sections->len > id && g_ptr_array_index (values->sections, id))
 200     {
 201       gtk_css_section_unref (g_ptr_array_index (values->sections, id));
 202       g_ptr_array_index (values->sections, id) = NULL;
 203     }
 204
 205   if (section)
 206     {
 207       if (values->sections == NULL)
 208         values->sections = g_ptr_array_new_with_free_func (maybe_unref_section);
 209       if (values->sections->len <= id)
 210         g_ptr_array_set_size (values->sections, id + 1);
 211
 212       g_ptr_array_index (values->sections, id) = gtk_css_section_ref (section);
 213     }
 214 }
 215
 216 GtkCssValue *
 217 _gtk_css_computed_values_get_value (GtkCssComputedValues *values,
 218                                     guint                 id)
 219 {
 220   gtk_internal_return_val_if_fail (GTK_IS_CSS_COMPUTED_VALUES (values), NULL);
 221
 222   if (values->animated_values &&
 223       id < values->animated_values->len &&
 224       g_ptr_array_index (values->animated_values, id))
 225     return g_ptr_array_index (values->animated_values, id);
 226
 227   return _gtk_css_computed_values_get_intrinsic_value (values, id);
 228 }
 229
 230 GtkCssValue *
 231 _gtk_css_computed_values_get_intrinsic_value (GtkCssComputedValues *values,
 232                                               guint                 id)
 233 {
 234   gtk_internal_return_val_if_fail (GTK_IS_CSS_COMPUTED_VALUES (values), NULL);
 235
 236   if (values->values == NULL ||
 237       id >= values->values->len)
 238     return NULL;
 239
 240   return g_ptr_array_index (values->values, id);
 241 }
 242
 243 GtkCssSection *
 244 _gtk_css_computed_values_get_section (GtkCssComputedValues *values,
 245                                       guint                 id)
 246 {
 247   gtk_internal_return_val_if_fail (GTK_IS_CSS_COMPUTED_VALUES (values), NULL);
 248
 249   if (values->sections == NULL ||
 250       id >= values->sections->len)
 251     return NULL;
 252
 253   return g_ptr_array_index (values->sections, id);
 254 }
 255
 256 GtkBitmask *
 257 _gtk_css_computed_values_get_difference (GtkCssComputedValues *values,
 258                                          GtkCssComputedValues *other)
 259 {
 260   GtkBitmask *result;
 261   guint i, len;
 262
 263   len = MIN (values->values->len, other->values->len);
 264   result = _gtk_bitmask_new ();
 265   if (values->values->len != other->values->len)
 266     result = _gtk_bitmask_invert_range (result, len, MAX (values->values->len, other->values->len));
 267
 268   for (i = 0; i < len; i++)
 269     {
 270       if (!_gtk_css_value_equal (g_ptr_array_index (values->values, i),
 271                                  g_ptr_array_index (other->values, i)))
 272         result = _gtk_bitmask_set (result, i, TRUE);
 273     }
 274
 275   return result;
 276 }
 277
 278 /* TRANSITIONS */
 279
 280 typedef struct _TransitionInfo TransitionInfo;
 281 struct _TransitionInfo {
 282   guint index;                  /* index into value arrays */
 283   gboolean pending;             /* TRUE if we still need to handle it */
 284 };
 285
 286 static void
 287 transition_info_add (TransitionInfo    infos[GTK_CSS_PROPERTY_N_PROPERTIES],
 288                      GtkStyleProperty *property,
 289                      guint             index)
 290 {
 291   if (property == NULL)
 292     {
 293       guint i;
 294
 295       for (i = 0; i < _gtk_css_style_property_get_n_properties (); i++)
 296         {
 297           GtkCssStyleProperty *prop = _gtk_css_style_property_lookup_by_id (i);
 298
 299           transition_info_add (infos, GTK_STYLE_PROPERTY (prop), index);
 300         }
 301     }
 302   else if (GTK_IS_CSS_SHORTHAND_PROPERTY (property))
 303     {
 304       GtkCssShorthandProperty *shorthand = GTK_CSS_SHORTHAND_PROPERTY (property);
 305       guint i;
 306
 307       for (i = 0; i < _gtk_css_shorthand_property_get_n_subproperties (shorthand); i++)
 308         {
 309           GtkCssStyleProperty *prop = _gtk_css_shorthand_property_get_subproperty (shorthand, i);
 310
 311           transition_info_add (infos, GTK_STYLE_PROPERTY (prop), index);
 312         }
 313     }
 314   else if (GTK_IS_CSS_STYLE_PROPERTY (property))
 315     {
 316       guint id;
 317
 318       if (!_gtk_css_style_property_is_animated (GTK_CSS_STYLE_PROPERTY (property)))
 319         return;
 320
 321       id = _gtk_css_style_property_get_id (GTK_CSS_STYLE_PROPERTY (property));
 322       g_assert (id < GTK_CSS_PROPERTY_N_PROPERTIES);
 323       infos[id].index = index;
 324       infos[id].pending = TRUE;
 325     }
 326   else
 327     {
 328       g_assert_not_reached ();
 329     }
 330 }
 331
 332 static void
 333 transition_infos_set (TransitionInfo  infos[GTK_CSS_PROPERTY_N_PROPERTIES],
 334                       GtkCssValue    *transitions)
 335 {
 336   guint i;
 337
 338   for (i = 0; i < _gtk_css_array_value_get_n_values (transitions); i++)
 339     {
 340       GtkStyleProperty *property;
 341       GtkCssValue *prop_value;
 342
 343       prop_value = _gtk_css_array_value_get_nth (transitions, i);
 344       if (g_ascii_strcasecmp (_gtk_css_ident_value_get (prop_value), "all") == 0)
 345         property = NULL;
 346       else
 347         {
 348           property = _gtk_style_property_lookup (_gtk_css_ident_value_get (prop_value));
 349           if (property == NULL)
 350             continue;
 351         }
 352
 353       transition_info_add (infos, property, i);
 354     }
 355 }
 356
 357 static GtkStyleAnimation *
 358 gtk_css_computed_values_find_transition (GtkCssComputedValues *values,
 359                                          guint                 property_id)
 360 {
 361   GSList *list;
 362
 363   for (list = values->animations; list; list = list->next)
 364     {
 365       if (!GTK_IS_CSS_TRANSITION (list->data))
 366         continue;
 367
 368       if (_gtk_css_transition_get_property (list->data) == property_id)
 369         return list->data;
 370     }
 371
 372   return NULL;
 373 }
 374
 375 static void
 376 gtk_css_computed_values_create_css_transitions (GtkCssComputedValues *values,
 377                                                 gint64                timestamp,
 378                                                 GtkCssComputedValues *source)
 379 {
 380   TransitionInfo transitions[GTK_CSS_PROPERTY_N_PROPERTIES] = { { 0, } };
 381   GtkCssValue *durations, *delays, *timing_functions;
 382   guint i;
 383
 384   transition_infos_set (transitions, _gtk_css_computed_values_get_value (values, GTK_CSS_PROPERTY_TRANSITION_PROPERTY));
 385
 386   durations = _gtk_css_computed_values_get_value (values, GTK_CSS_PROPERTY_TRANSITION_DURATION);
 387   delays = _gtk_css_computed_values_get_value (values, GTK_CSS_PROPERTY_TRANSITION_DELAY);
 388   timing_functions = _gtk_css_computed_values_get_value (values, GTK_CSS_PROPERTY_TRANSITION_TIMING_FUNCTION);
 389
 390   for (i = 0; i < GTK_CSS_PROPERTY_N_PROPERTIES; i++)
 391     {
 392       GtkStyleAnimation *animation;
 393       GtkCssValue *start, *end;
 394       double duration, delay;
 395
 396       if (!transitions[i].pending)
 397         continue;
 398
 399       duration = _gtk_css_number_value_get (_gtk_css_array_value_get_nth (durations, transitions[i].index), 100);
 400       delay = _gtk_css_number_value_get (_gtk_css_array_value_get_nth (delays, transitions[i].index), 100);
 401       if (duration + delay == 0.0)
 402         continue;
 403
 404       start = _gtk_css_computed_values_get_intrinsic_value (source, i);
 405       end = _gtk_css_computed_values_get_intrinsic_value (values, i);
 406       if (_gtk_css_value_equal (start, end))
 407         {
 408           animation = gtk_css_computed_values_find_transition (GTK_CSS_COMPUTED_VALUES (source), i);
 409           if (animation)
 410             values->animations = g_slist_prepend (values->animations, g_object_ref (animation));
 411         }
 412       else
 413         {
 414           animation = _gtk_css_transition_new (i,
 415                                                _gtk_css_computed_values_get_value (source, i),
 416                                                _gtk_css_array_value_get_nth (timing_functions, i),
 417                                                timestamp + delay * G_USEC_PER_SEC,
 418                                                timestamp + (delay + duration) * G_USEC_PER_SEC);
 419           values->animations = g_slist_prepend (values->animations, animation);
 420         }
 421     }
 422 }
 423
 424 static GtkStyleAnimation *
 425 gtk_css_computed_values_find_animation (GtkCssComputedValues *values,
 426                                         const char           *name)
 427 {
 428   GSList *list;
 429
 430   for (list = values->animations; list; list = list->next)
 431     {
 432       if (!GTK_IS_CSS_ANIMATION (list->data))
 433         continue;
 434
 435       if (g_str_equal (_gtk_css_animation_get_name (list->data), name))
 436         return list->data;
 437     }
 438
 439   return NULL;
 440 }
 441
 442 static void
 443 gtk_css_computed_values_create_css_animations (GtkCssComputedValues    *values,
 444                                                GtkCssComputedValues    *parent_values,
 445                                                gint64                   timestamp,
 446                                                GtkStyleProviderPrivate *provider,
 447                                                GtkCssComputedValues    *source)
 448 {
 449   GtkCssValue *durations, *delays, *timing_functions, *animations;
 450   GtkCssValue *iteration_counts, *directions, *play_states, *fill_modes;
 451   guint i;
 452
 453   animations = _gtk_css_computed_values_get_value (values, GTK_CSS_PROPERTY_ANIMATION_NAME);
 454   durations = _gtk_css_computed_values_get_value (values, GTK_CSS_PROPERTY_ANIMATION_DURATION);
 455   delays = _gtk_css_computed_values_get_value (values, GTK_CSS_PROPERTY_ANIMATION_DELAY);
 456   timing_functions = _gtk_css_computed_values_get_value (values, GTK_CSS_PROPERTY_ANIMATION_TIMING_FUNCTION);
 457   iteration_counts = _gtk_css_computed_values_get_value (values, GTK_CSS_PROPERTY_ANIMATION_ITERATION_COUNT);
 458   directions = _gtk_css_computed_values_get_value (values, GTK_CSS_PROPERTY_ANIMATION_DIRECTION);
 459   play_states = _gtk_css_computed_values_get_value (values, GTK_CSS_PROPERTY_ANIMATION_PLAY_STATE);
 460   fill_modes = _gtk_css_computed_values_get_value (values, GTK_CSS_PROPERTY_ANIMATION_FILL_MODE);
 461
 462   for (i = 0; i < _gtk_css_array_value_get_n_values (animations); i++)
 463     {
 464       GtkStyleAnimation *animation;
 465       GtkCssKeyframes *keyframes;
 466       const char *name;
 467
 468       name = _gtk_css_ident_value_get (_gtk_css_array_value_get_nth (animations, i));
 469       if (g_ascii_strcasecmp (name, "none") == 0)
 470         continue;
 471
 472       animation = gtk_css_computed_values_find_animation (values, name);
 473       if (animation)
 474         continue;
 475
 476       if (source)
 477         animation = gtk_css_computed_values_find_animation (source, name);
 478
 479       if (animation)
 480         {
 481           animation = _gtk_css_animation_copy (GTK_CSS_ANIMATION (animation),
 482                                                timestamp,
 483                                                _gtk_css_play_state_value_get (_gtk_css_array_value_get_nth (play_states, i)));
 484         }
 485       else
 486         {
 487           keyframes = _gtk_style_provider_private_get_keyframes (provider, name);
 488           if (keyframes == NULL)
 489             continue;
 490
 491           keyframes = _gtk_css_keyframes_compute (keyframes, provider, values, parent_values);
 492
 493           animation = _gtk_css_animation_new (name,
 494                                               keyframes,
 495                                               timestamp,
 496                                               _gtk_css_number_value_get (_gtk_css_array_value_get_nth (delays, i), 100) * G_USEC_PER_SEC,
 497                                               _gtk_css_number_value_get (_gtk_css_array_value_get_nth (durations, i), 100) * G_USEC_PER_SEC,
 498                                               _gtk_css_array_value_get_nth (timing_functions, i),
 499                                               _gtk_css_direction_value_get (_gtk_css_array_value_get_nth (directions, i)),
 500                                               _gtk_css_play_state_value_get (_gtk_css_array_value_get_nth (play_states, i)),
 501                                               _gtk_css_fill_mode_value_get (_gtk_css_array_value_get_nth (fill_modes, i)),
 502                                               _gtk_css_number_value_get (_gtk_css_array_value_get_nth (iteration_counts, i), 100));
 503           _gtk_css_keyframes_unref (keyframes);
 504         }
 505       values->animations = g_slist_prepend (values->animations, animation);
 506     }
 507 }
 508
 509 /* PUBLIC API */
 510
 511 void
 512 _gtk_css_computed_values_create_animations (GtkCssComputedValues    *values,
 513                                             GtkCssComputedValues    *parent_values,
 514                                             gint64                   timestamp,
 515                                             GtkStyleProviderPrivate *provider,
 516                                             GtkCssComputedValues    *source)
 517 {
 518   if (source != NULL)
 519     gtk_css_computed_values_create_css_transitions (values, timestamp, source);
 520   gtk_css_computed_values_create_css_animations (values, parent_values, timestamp, provider, source);
 521 }
 522
 523 GtkBitmask *
 524 _gtk_css_computed_values_advance (GtkCssComputedValues *values,
 525                                   gint64                timestamp)
 526 {
 527   GtkBitmask *changed;
 528   GPtrArray *old_computed_values;
 529   GSList *list;
 530   guint i;
 531
 532   gtk_internal_return_val_if_fail (GTK_IS_CSS_COMPUTED_VALUES (values), NULL);
 533   gtk_internal_return_val_if_fail (timestamp >= values->current_time, NULL);
 534
 535   values->current_time = timestamp;
 536   old_computed_values = values->animated_values;
 537   values->animated_values = NULL;
 538
 539   list = values->animations;
 540   while (list)
 541     {
 542       GtkStyleAnimation *animation = list->data;
 543
 544       list = list->next;
 545
 546       _gtk_style_animation_set_values (animation,
 547                                        timestamp,
 548                                        GTK_CSS_COMPUTED_VALUES (values));
 549
 550       if (_gtk_style_animation_is_finished (animation, timestamp))
 551         {
 552           values->animations = g_slist_remove (values->animations, animation);
 553           g_object_unref (animation);
 554         }
 555     }
 556
 557   /* figure out changes */
 558   changed = _gtk_bitmask_new ();
 559
 560   for (i = 0; i < GTK_CSS_PROPERTY_N_PROPERTIES; i++)
 561     {
 562       GtkCssValue *old_animated, *new_animated;
 563
 564       old_animated = old_computed_values && i < old_computed_values->len ? g_ptr_array_index (old_computed_values, i) : NULL;
 565       new_animated = values->animated_values && i < values->animated_values->len ? g_ptr_array_index (values->animated_values, i) : NULL;
 566
 567       if (!_gtk_css_value_equal0 (old_animated, new_animated))
 568         changed = _gtk_bitmask_set (changed, i, TRUE);
 569     }
 570
 571   if (old_computed_values)
 572     g_ptr_array_unref (old_computed_values);
 573
 574   return changed;
 575 }
 576
 577 gboolean
 578 _gtk_css_computed_values_is_static (GtkCssComputedValues *values)
 579 {
 580   GSList *list;
 581
 582   gtk_internal_return_val_if_fail (GTK_IS_CSS_COMPUTED_VALUES (values), TRUE);
 583
 584   for (list = values->animations; list; list = list->next)
 585     {
 586       if (!_gtk_style_animation_is_static (list->data, values->current_time))
 587         return FALSE;
 588     }
 589
 590   return TRUE;
 591 }
 592
 593 void
 594 _gtk_css_computed_values_cancel_animations (GtkCssComputedValues *values)
 595 {
 596   gtk_internal_return_if_fail (GTK_IS_CSS_COMPUTED_VALUES (values));
 597
 598   if (values->animated_values)
 599     {
 600       g_ptr_array_unref (values->animated_values);
 601       values->animated_values = NULL;
 602     }
 603
 604   g_slist_free_full (values->animations, g_object_unref);
 605   values->animations = NULL;
 606 }
 607
 608 GtkBitmask *
 609 _gtk_css_computed_values_compute_dependencies (GtkCssComputedValues *values,
 610                                                const GtkBitmask     *parent_changes)
 611 {
 612   GtkBitmask *changes;
 613
 614   gtk_internal_return_val_if_fail (GTK_IS_CSS_COMPUTED_VALUES (values), _gtk_bitmask_new ());
 615
 616   changes = _gtk_bitmask_copy (parent_changes);
 617   changes = _gtk_bitmask_intersect (changes, values->depends_on_parent);
 618   if (_gtk_bitmask_get (changes, GTK_CSS_PROPERTY_COLOR))
 619     changes = _gtk_bitmask_union (changes, values->depends_on_color);
 620   if (_gtk_bitmask_get (changes, GTK_CSS_PROPERTY_FONT_SIZE))
 621     changes = _gtk_bitmask_union (changes, values->depends_on_font_size);
 622
 623   return changes;
 624 }
 625