2 * Copyright © 2012 Red Hat Inc.
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.
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.
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/>.
17 * Authors: Benjamin Otte <otte@gnome.org>
22 #include "gtkcsscomputedvaluesprivate.h"
24 #include "gtkcssanimationprivate.h"
25 #include "gtkcssarrayvalueprivate.h"
26 #include "gtkcssenumvalueprivate.h"
27 #include "gtkcssinheritvalueprivate.h"
28 #include "gtkcssinitialvalueprivate.h"
29 #include "gtkcssnumbervalueprivate.h"
30 #include "gtkcssshorthandpropertyprivate.h"
31 #include "gtkcssstringvalueprivate.h"
32 #include "gtkcssstylepropertyprivate.h"
33 #include "gtkcsstransitionprivate.h"
34 #include "gtkstyleanimationprivate.h"
35 #include "gtkstylepropertiesprivate.h"
36 #include "gtkstylepropertyprivate.h"
37 #include "gtkstyleproviderprivate.h"
39 G_DEFINE_TYPE (GtkCssComputedValues, _gtk_css_computed_values, G_TYPE_OBJECT)
42 gtk_css_computed_values_dispose (GObject *object)
44 GtkCssComputedValues *values = GTK_CSS_COMPUTED_VALUES (object);
48 g_ptr_array_unref (values->values);
49 values->values = NULL;
53 g_ptr_array_unref (values->sections);
54 values->sections = NULL;
56 if (values->animated_values)
58 g_ptr_array_unref (values->animated_values);
59 values->animated_values = NULL;
62 g_slist_free_full (values->animations, g_object_unref);
63 values->animations = NULL;
65 G_OBJECT_CLASS (_gtk_css_computed_values_parent_class)->dispose (object);
69 gtk_css_computed_values_finalize (GObject *object)
71 GtkCssComputedValues *values = GTK_CSS_COMPUTED_VALUES (object);
73 _gtk_bitmask_free (values->depends_on_parent);
74 _gtk_bitmask_free (values->equals_parent);
75 _gtk_bitmask_free (values->depends_on_color);
76 _gtk_bitmask_free (values->depends_on_font_size);
78 G_OBJECT_CLASS (_gtk_css_computed_values_parent_class)->finalize (object);
82 _gtk_css_computed_values_class_init (GtkCssComputedValuesClass *klass)
84 GObjectClass *object_class = G_OBJECT_CLASS (klass);
86 object_class->dispose = gtk_css_computed_values_dispose;
87 object_class->finalize = gtk_css_computed_values_finalize;
91 _gtk_css_computed_values_init (GtkCssComputedValues *values)
93 values->depends_on_parent = _gtk_bitmask_new ();
94 values->equals_parent = _gtk_bitmask_new ();
95 values->depends_on_color = _gtk_bitmask_new ();
96 values->depends_on_font_size = _gtk_bitmask_new ();
99 GtkCssComputedValues *
100 _gtk_css_computed_values_new (void)
102 return g_object_new (GTK_TYPE_CSS_COMPUTED_VALUES, NULL);
106 maybe_unref_section (gpointer section)
109 gtk_css_section_unref (section);
113 _gtk_css_computed_values_compute_value (GtkCssComputedValues *values,
114 GtkStyleContext *context,
116 GtkCssValue *specified,
117 GtkCssSection *section)
119 GtkCssDependencies dependencies;
122 g_return_if_fail (GTK_IS_CSS_COMPUTED_VALUES (values));
123 g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
125 /* http://www.w3.org/TR/css3-cascade/#cascade
126 * Then, for every element, the value for each property can be found
127 * by following this pseudo-algorithm:
128 * 1) Identify all declarations that apply to the element
130 if (specified == NULL)
132 GtkCssStyleProperty *prop = _gtk_css_style_property_lookup_by_id (id);
134 if (_gtk_css_style_property_is_inherit (prop))
135 specified = _gtk_css_inherit_value_new ();
137 specified = _gtk_css_initial_value_new ();
140 _gtk_css_value_ref (specified);
142 value = _gtk_css_value_compute (specified, id, context, &dependencies);
144 _gtk_css_computed_values_set_value (values, id, value, dependencies, section);
146 _gtk_css_value_unref (value);
147 _gtk_css_value_unref (specified);
151 _gtk_css_computed_values_set_animated_value (GtkCssComputedValues *values,
155 g_return_if_fail (GTK_IS_CSS_COMPUTED_VALUES (values));
156 g_return_if_fail (value != NULL);
158 if (values->animated_values == NULL)
159 values->animated_values = g_ptr_array_new_with_free_func ((GDestroyNotify)_gtk_css_value_unref);
160 if (id >= values->animated_values->len)
161 g_ptr_array_set_size (values->animated_values, id + 1);
163 if (g_ptr_array_index (values->animated_values, id))
164 _gtk_css_value_unref (g_ptr_array_index (values->animated_values, id));
165 g_ptr_array_index (values->animated_values, id) = _gtk_css_value_ref (value);
170 _gtk_css_computed_values_set_value (GtkCssComputedValues *values,
173 GtkCssDependencies dependencies,
174 GtkCssSection *section)
176 g_return_if_fail (GTK_IS_CSS_COMPUTED_VALUES (values));
178 if (values->values == NULL)
179 values->values = g_ptr_array_new_with_free_func ((GDestroyNotify)_gtk_css_value_unref);
180 if (id >= values->values->len)
181 g_ptr_array_set_size (values->values, id + 1);
183 if (g_ptr_array_index (values->values, id))
184 _gtk_css_value_unref (g_ptr_array_index (values->values, id));
185 g_ptr_array_index (values->values, id) = _gtk_css_value_ref (value);
187 if (dependencies & (GTK_CSS_DEPENDS_ON_PARENT | GTK_CSS_EQUALS_PARENT))
188 values->depends_on_parent = _gtk_bitmask_set (values->depends_on_parent, id, TRUE);
189 if (dependencies & (GTK_CSS_EQUALS_PARENT))
190 values->equals_parent = _gtk_bitmask_set (values->equals_parent, id, TRUE);
191 if (dependencies & (GTK_CSS_DEPENDS_ON_COLOR))
192 values->depends_on_color = _gtk_bitmask_set (values->depends_on_color, id, TRUE);
193 if (dependencies & (GTK_CSS_DEPENDS_ON_FONT_SIZE))
194 values->depends_on_font_size = _gtk_bitmask_set (values->depends_on_font_size, id, TRUE);
198 if (values->sections == NULL)
199 values->sections = g_ptr_array_new_with_free_func (maybe_unref_section);
200 if (values->sections->len <= id)
201 g_ptr_array_set_size (values->sections, id + 1);
203 g_ptr_array_index (values->sections, id) = gtk_css_section_ref (section);
208 _gtk_css_computed_values_get_value (GtkCssComputedValues *values,
211 g_return_val_if_fail (GTK_IS_CSS_COMPUTED_VALUES (values), NULL);
213 if (values->animated_values &&
214 id < values->animated_values->len &&
215 g_ptr_array_index (values->animated_values, id))
216 return g_ptr_array_index (values->animated_values, id);
218 return _gtk_css_computed_values_get_intrinsic_value (values, id);
222 _gtk_css_computed_values_get_intrinsic_value (GtkCssComputedValues *values,
225 g_return_val_if_fail (GTK_IS_CSS_COMPUTED_VALUES (values), NULL);
227 if (values->values == NULL ||
228 id >= values->values->len)
231 return g_ptr_array_index (values->values, id);
235 _gtk_css_computed_values_get_section (GtkCssComputedValues *values,
238 g_return_val_if_fail (GTK_IS_CSS_COMPUTED_VALUES (values), NULL);
240 if (values->sections == NULL ||
241 id >= values->sections->len)
244 return g_ptr_array_index (values->sections, id);
248 _gtk_css_computed_values_get_difference (GtkCssComputedValues *values,
249 GtkCssComputedValues *other)
254 len = MIN (values->values->len, other->values->len);
255 result = _gtk_bitmask_new ();
256 if (values->values->len != other->values->len)
257 result = _gtk_bitmask_invert_range (result, len, MAX (values->values->len, other->values->len));
259 for (i = 0; i < len; i++)
261 if (!_gtk_css_value_equal (g_ptr_array_index (values->values, i),
262 g_ptr_array_index (other->values, i)))
263 result = _gtk_bitmask_set (result, i, TRUE);
271 typedef struct _TransitionInfo TransitionInfo;
272 struct _TransitionInfo {
273 guint index; /* index into value arrays */
274 gboolean pending; /* TRUE if we still need to handle it */
278 transition_info_add (TransitionInfo infos[GTK_CSS_PROPERTY_N_PROPERTIES],
279 GtkStyleProperty *property,
282 if (property == NULL)
286 for (i = 0; i < _gtk_css_style_property_get_n_properties (); i++)
288 GtkCssStyleProperty *prop = _gtk_css_style_property_lookup_by_id (i);
290 transition_info_add (infos, GTK_STYLE_PROPERTY (prop), index);
293 else if (GTK_IS_CSS_SHORTHAND_PROPERTY (property))
295 GtkCssShorthandProperty *shorthand = GTK_CSS_SHORTHAND_PROPERTY (property);
298 for (i = 0; i < _gtk_css_shorthand_property_get_n_subproperties (shorthand); i++)
300 GtkCssStyleProperty *prop = _gtk_css_shorthand_property_get_subproperty (shorthand, i);
302 transition_info_add (infos, GTK_STYLE_PROPERTY (prop), index);
305 else if (GTK_IS_CSS_STYLE_PROPERTY (property))
309 if (!_gtk_css_style_property_is_animated (GTK_CSS_STYLE_PROPERTY (property)))
312 id = _gtk_css_style_property_get_id (GTK_CSS_STYLE_PROPERTY (property));
313 g_assert (id < GTK_CSS_PROPERTY_N_PROPERTIES);
314 infos[id].index = index;
315 infos[id].pending = TRUE;
319 g_assert_not_reached ();
324 transition_infos_set (TransitionInfo infos[GTK_CSS_PROPERTY_N_PROPERTIES],
325 GtkCssValue *transitions)
329 for (i = 0; i < _gtk_css_array_value_get_n_values (transitions); i++)
331 GtkStyleProperty *property;
332 GtkCssValue *prop_value;
334 prop_value = _gtk_css_array_value_get_nth (transitions, i);
335 if (g_ascii_strcasecmp (_gtk_css_ident_value_get (prop_value), "all") == 0)
339 property = _gtk_style_property_lookup (_gtk_css_ident_value_get (prop_value));
340 if (property == NULL)
344 transition_info_add (infos, property, i);
348 static GtkStyleAnimation *
349 gtk_css_computed_values_find_transition (GtkCssComputedValues *values,
354 for (list = values->animations; list; list = list->next)
356 if (!GTK_IS_CSS_TRANSITION (list->data))
359 if (_gtk_css_transition_get_property (list->data) == property_id)
367 gtk_css_computed_values_start_transitions (GtkCssComputedValues *values,
369 GtkCssComputedValues *source)
371 TransitionInfo transitions[GTK_CSS_PROPERTY_N_PROPERTIES] = { { 0, } };
372 GtkCssValue *durations, *delays, *timing_functions;
375 transition_infos_set (transitions, _gtk_css_computed_values_get_value (values, GTK_CSS_PROPERTY_TRANSITION_PROPERTY));
377 durations = _gtk_css_computed_values_get_value (values, GTK_CSS_PROPERTY_TRANSITION_DURATION);
378 delays = _gtk_css_computed_values_get_value (values, GTK_CSS_PROPERTY_TRANSITION_DELAY);
379 timing_functions = _gtk_css_computed_values_get_value (values, GTK_CSS_PROPERTY_TRANSITION_TIMING_FUNCTION);
381 for (i = 0; i < GTK_CSS_PROPERTY_N_PROPERTIES; i++)
383 GtkStyleAnimation *animation;
384 GtkCssValue *start, *end;
385 double duration, delay;
387 if (!transitions[i].pending)
390 duration = _gtk_css_number_value_get (_gtk_css_array_value_get_nth (durations, transitions[i].index), 100);
391 delay = _gtk_css_number_value_get (_gtk_css_array_value_get_nth (delays, transitions[i].index), 100);
392 if (duration + delay == 0.0)
395 start = _gtk_css_computed_values_get_intrinsic_value (source, i);
396 end = _gtk_css_computed_values_get_intrinsic_value (values, i);
397 if (_gtk_css_value_equal (start, end))
399 animation = gtk_css_computed_values_find_transition (GTK_CSS_COMPUTED_VALUES (source), i);
401 values->animations = g_slist_prepend (values->animations, g_object_ref (animation));
405 animation = _gtk_css_transition_new (i,
408 _gtk_css_array_value_get_nth (timing_functions, i),
409 timestamp + delay * G_USEC_PER_SEC,
410 timestamp + (delay + duration) * G_USEC_PER_SEC);
411 values->animations = g_slist_prepend (values->animations, animation);
416 static GtkStyleAnimation *
417 gtk_css_computed_values_find_animation (GtkCssComputedValues *values,
422 for (list = values->animations; list; list = list->next)
424 if (!GTK_IS_CSS_ANIMATION (list->data))
427 if (g_str_equal (_gtk_css_animation_get_name (list->data), name))
435 gtk_css_computed_values_start_css_animations (GtkCssComputedValues *values,
437 GtkStyleContext *context)
439 GtkStyleProviderPrivate *provider;
440 GtkCssValue *durations, *delays, *timing_functions, *animations;
441 GtkCssValue *iteration_counts, *directions, *play_states, *fill_modes;
444 provider = _gtk_style_context_get_style_provider (context);
445 animations = _gtk_css_computed_values_get_value (values, GTK_CSS_PROPERTY_ANIMATION_NAME);
446 durations = _gtk_css_computed_values_get_value (values, GTK_CSS_PROPERTY_ANIMATION_DURATION);
447 delays = _gtk_css_computed_values_get_value (values, GTK_CSS_PROPERTY_ANIMATION_DELAY);
448 timing_functions = _gtk_css_computed_values_get_value (values, GTK_CSS_PROPERTY_ANIMATION_TIMING_FUNCTION);
449 iteration_counts = _gtk_css_computed_values_get_value (values, GTK_CSS_PROPERTY_ANIMATION_ITERATION_COUNT);
450 directions = _gtk_css_computed_values_get_value (values, GTK_CSS_PROPERTY_ANIMATION_DIRECTION);
451 play_states = _gtk_css_computed_values_get_value (values, GTK_CSS_PROPERTY_ANIMATION_PLAY_STATE);
452 fill_modes = _gtk_css_computed_values_get_value (values, GTK_CSS_PROPERTY_ANIMATION_FILL_MODE);
454 for (i = 0; i < _gtk_css_array_value_get_n_values (animations); i++)
456 GtkStyleAnimation *animation;
457 GtkCssKeyframes *keyframes;
460 name = _gtk_css_ident_value_get (_gtk_css_array_value_get_nth (animations, i));
461 if (g_ascii_strcasecmp (name, "none") == 0)
464 animation = gtk_css_computed_values_find_animation (values, name);
468 keyframes = _gtk_style_provider_private_get_keyframes (provider, name);
469 if (keyframes == NULL)
472 keyframes = _gtk_css_keyframes_compute (keyframes, context);
474 animation = _gtk_css_animation_new (name,
476 timestamp + _gtk_css_number_value_get (_gtk_css_array_value_get_nth (delays, i), 100) * G_USEC_PER_SEC,
477 _gtk_css_number_value_get (_gtk_css_array_value_get_nth (durations, i), 100) * G_USEC_PER_SEC,
478 _gtk_css_array_value_get_nth (timing_functions, i),
479 _gtk_css_direction_value_get (_gtk_css_array_value_get_nth (directions, i)),
480 _gtk_css_play_state_value_get (_gtk_css_array_value_get_nth (play_states, i)),
481 _gtk_css_fill_mode_value_get (_gtk_css_array_value_get_nth (fill_modes, i)),
482 _gtk_css_number_value_get (_gtk_css_array_value_get_nth (iteration_counts, i), 100));
483 values->animations = g_slist_prepend (values->animations, animation);
490 _gtk_css_computed_values_start_animations (GtkCssComputedValues *values,
492 GtkCssComputedValues *source,
493 GtkStyleContext *context)
497 gtk_css_computed_values_start_transitions (values, timestamp, source);
498 gtk_css_computed_values_start_css_animations (values, timestamp, context);
500 ignore = _gtk_css_computed_values_advance (values, timestamp);
501 _gtk_bitmask_free (ignore);
505 _gtk_css_computed_values_advance (GtkCssComputedValues *values,
509 GPtrArray *old_computed_values;
512 g_return_val_if_fail (GTK_IS_CSS_COMPUTED_VALUES (values), NULL);
513 g_return_val_if_fail (timestamp >= values->current_time, NULL);
515 changed = _gtk_bitmask_new ();
517 values->current_time = timestamp;
518 old_computed_values = values->animated_values;
519 values->animated_values = NULL;
521 list = values->animations;
524 GtkStyleAnimation *animation = list->data;
528 changed = _gtk_style_animation_set_values (animation,
531 GTK_CSS_COMPUTED_VALUES (values));
533 if (_gtk_style_animation_is_finished (animation, timestamp))
535 values->animations = g_slist_remove (values->animations, animation);
536 g_object_unref (animation);
540 if (old_computed_values)
541 g_ptr_array_unref (old_computed_values);
547 _gtk_css_computed_values_is_static (GtkCssComputedValues *values)
551 g_return_val_if_fail (GTK_IS_CSS_COMPUTED_VALUES (values), TRUE);
553 for (list = values->animations; list; list = list->next)
555 if (!_gtk_style_animation_is_static (list->data, values->current_time))