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 GtkStyleProviderPrivate *provider,
115 GtkCssComputedValues *parent_values,
117 GtkCssValue *specified,
118 GtkCssSection *section)
120 GtkCssDependencies dependencies;
123 g_return_if_fail (GTK_IS_CSS_COMPUTED_VALUES (values));
124 g_return_if_fail (GTK_IS_STYLE_PROVIDER_PRIVATE (provider));
125 g_return_if_fail (parent_values == NULL || GTK_IS_CSS_COMPUTED_VALUES (parent_values));
127 /* http://www.w3.org/TR/css3-cascade/#cascade
128 * Then, for every element, the value for each property can be found
129 * by following this pseudo-algorithm:
130 * 1) Identify all declarations that apply to the element
132 if (specified == NULL)
134 GtkCssStyleProperty *prop = _gtk_css_style_property_lookup_by_id (id);
136 if (_gtk_css_style_property_is_inherit (prop))
137 specified = _gtk_css_inherit_value_new ();
139 specified = _gtk_css_initial_value_new ();
142 _gtk_css_value_ref (specified);
144 value = _gtk_css_value_compute (specified, id, provider, values, parent_values, &dependencies);
146 _gtk_css_computed_values_set_value (values, id, value, dependencies, section);
148 _gtk_css_value_unref (value);
149 _gtk_css_value_unref (specified);
153 _gtk_css_computed_values_set_animated_value (GtkCssComputedValues *values,
157 g_return_if_fail (GTK_IS_CSS_COMPUTED_VALUES (values));
158 g_return_if_fail (value != NULL);
160 if (values->animated_values == NULL)
161 values->animated_values = g_ptr_array_new_with_free_func ((GDestroyNotify)_gtk_css_value_unref);
162 if (id >= values->animated_values->len)
163 g_ptr_array_set_size (values->animated_values, id + 1);
165 if (g_ptr_array_index (values->animated_values, id))
166 _gtk_css_value_unref (g_ptr_array_index (values->animated_values, id));
167 g_ptr_array_index (values->animated_values, id) = _gtk_css_value_ref (value);
172 _gtk_css_computed_values_set_value (GtkCssComputedValues *values,
175 GtkCssDependencies dependencies,
176 GtkCssSection *section)
178 g_return_if_fail (GTK_IS_CSS_COMPUTED_VALUES (values));
180 if (values->values == NULL)
181 values->values = g_ptr_array_new_with_free_func ((GDestroyNotify)_gtk_css_value_unref);
182 if (id >= values->values->len)
183 g_ptr_array_set_size (values->values, id + 1);
185 if (g_ptr_array_index (values->values, id))
186 _gtk_css_value_unref (g_ptr_array_index (values->values, id));
187 g_ptr_array_index (values->values, id) = _gtk_css_value_ref (value);
189 if (dependencies & (GTK_CSS_DEPENDS_ON_PARENT | GTK_CSS_EQUALS_PARENT))
190 values->depends_on_parent = _gtk_bitmask_set (values->depends_on_parent, id, TRUE);
191 if (dependencies & (GTK_CSS_EQUALS_PARENT))
192 values->equals_parent = _gtk_bitmask_set (values->equals_parent, id, TRUE);
193 if (dependencies & (GTK_CSS_DEPENDS_ON_COLOR))
194 values->depends_on_color = _gtk_bitmask_set (values->depends_on_color, id, TRUE);
195 if (dependencies & (GTK_CSS_DEPENDS_ON_FONT_SIZE))
196 values->depends_on_font_size = _gtk_bitmask_set (values->depends_on_font_size, id, TRUE);
198 if (values->sections && values->sections->len > id && g_ptr_array_index (values->sections, id))
200 gtk_css_section_unref (g_ptr_array_index (values->sections, id));
201 g_ptr_array_index (values->sections, id) = NULL;
206 if (values->sections == NULL)
207 values->sections = g_ptr_array_new_with_free_func (maybe_unref_section);
208 if (values->sections->len <= id)
209 g_ptr_array_set_size (values->sections, id + 1);
211 g_ptr_array_index (values->sections, id) = gtk_css_section_ref (section);
216 _gtk_css_computed_values_get_value (GtkCssComputedValues *values,
219 g_return_val_if_fail (GTK_IS_CSS_COMPUTED_VALUES (values), NULL);
221 if (values->animated_values &&
222 id < values->animated_values->len &&
223 g_ptr_array_index (values->animated_values, id))
224 return g_ptr_array_index (values->animated_values, id);
226 return _gtk_css_computed_values_get_intrinsic_value (values, id);
230 _gtk_css_computed_values_get_intrinsic_value (GtkCssComputedValues *values,
233 g_return_val_if_fail (GTK_IS_CSS_COMPUTED_VALUES (values), NULL);
235 if (values->values == NULL ||
236 id >= values->values->len)
239 return g_ptr_array_index (values->values, id);
243 _gtk_css_computed_values_get_section (GtkCssComputedValues *values,
246 g_return_val_if_fail (GTK_IS_CSS_COMPUTED_VALUES (values), NULL);
248 if (values->sections == NULL ||
249 id >= values->sections->len)
252 return g_ptr_array_index (values->sections, id);
256 _gtk_css_computed_values_get_difference (GtkCssComputedValues *values,
257 GtkCssComputedValues *other)
262 len = MIN (values->values->len, other->values->len);
263 result = _gtk_bitmask_new ();
264 if (values->values->len != other->values->len)
265 result = _gtk_bitmask_invert_range (result, len, MAX (values->values->len, other->values->len));
267 for (i = 0; i < len; i++)
269 if (!_gtk_css_value_equal (g_ptr_array_index (values->values, i),
270 g_ptr_array_index (other->values, i)))
271 result = _gtk_bitmask_set (result, i, TRUE);
279 typedef struct _TransitionInfo TransitionInfo;
280 struct _TransitionInfo {
281 guint index; /* index into value arrays */
282 gboolean pending; /* TRUE if we still need to handle it */
286 transition_info_add (TransitionInfo infos[GTK_CSS_PROPERTY_N_PROPERTIES],
287 GtkStyleProperty *property,
290 if (property == NULL)
294 for (i = 0; i < _gtk_css_style_property_get_n_properties (); i++)
296 GtkCssStyleProperty *prop = _gtk_css_style_property_lookup_by_id (i);
298 transition_info_add (infos, GTK_STYLE_PROPERTY (prop), index);
301 else if (GTK_IS_CSS_SHORTHAND_PROPERTY (property))
303 GtkCssShorthandProperty *shorthand = GTK_CSS_SHORTHAND_PROPERTY (property);
306 for (i = 0; i < _gtk_css_shorthand_property_get_n_subproperties (shorthand); i++)
308 GtkCssStyleProperty *prop = _gtk_css_shorthand_property_get_subproperty (shorthand, i);
310 transition_info_add (infos, GTK_STYLE_PROPERTY (prop), index);
313 else if (GTK_IS_CSS_STYLE_PROPERTY (property))
317 if (!_gtk_css_style_property_is_animated (GTK_CSS_STYLE_PROPERTY (property)))
320 id = _gtk_css_style_property_get_id (GTK_CSS_STYLE_PROPERTY (property));
321 g_assert (id < GTK_CSS_PROPERTY_N_PROPERTIES);
322 infos[id].index = index;
323 infos[id].pending = TRUE;
327 g_assert_not_reached ();
332 transition_infos_set (TransitionInfo infos[GTK_CSS_PROPERTY_N_PROPERTIES],
333 GtkCssValue *transitions)
337 for (i = 0; i < _gtk_css_array_value_get_n_values (transitions); i++)
339 GtkStyleProperty *property;
340 GtkCssValue *prop_value;
342 prop_value = _gtk_css_array_value_get_nth (transitions, i);
343 if (g_ascii_strcasecmp (_gtk_css_ident_value_get (prop_value), "all") == 0)
347 property = _gtk_style_property_lookup (_gtk_css_ident_value_get (prop_value));
348 if (property == NULL)
352 transition_info_add (infos, property, i);
356 static GtkStyleAnimation *
357 gtk_css_computed_values_find_transition (GtkCssComputedValues *values,
362 for (list = values->animations; list; list = list->next)
364 if (!GTK_IS_CSS_TRANSITION (list->data))
367 if (_gtk_css_transition_get_property (list->data) == property_id)
375 gtk_css_computed_values_create_css_transitions (GtkCssComputedValues *values,
377 GtkCssComputedValues *source)
379 TransitionInfo transitions[GTK_CSS_PROPERTY_N_PROPERTIES] = { { 0, } };
380 GtkCssValue *durations, *delays, *timing_functions;
383 transition_infos_set (transitions, _gtk_css_computed_values_get_value (values, GTK_CSS_PROPERTY_TRANSITION_PROPERTY));
385 durations = _gtk_css_computed_values_get_value (values, GTK_CSS_PROPERTY_TRANSITION_DURATION);
386 delays = _gtk_css_computed_values_get_value (values, GTK_CSS_PROPERTY_TRANSITION_DELAY);
387 timing_functions = _gtk_css_computed_values_get_value (values, GTK_CSS_PROPERTY_TRANSITION_TIMING_FUNCTION);
389 for (i = 0; i < GTK_CSS_PROPERTY_N_PROPERTIES; i++)
391 GtkStyleAnimation *animation;
392 GtkCssValue *start, *end;
393 double duration, delay;
395 if (!transitions[i].pending)
398 duration = _gtk_css_number_value_get (_gtk_css_array_value_get_nth (durations, transitions[i].index), 100);
399 delay = _gtk_css_number_value_get (_gtk_css_array_value_get_nth (delays, transitions[i].index), 100);
400 if (duration + delay == 0.0)
403 start = _gtk_css_computed_values_get_intrinsic_value (source, i);
404 end = _gtk_css_computed_values_get_intrinsic_value (values, i);
405 if (_gtk_css_value_equal (start, end))
407 animation = gtk_css_computed_values_find_transition (GTK_CSS_COMPUTED_VALUES (source), i);
409 values->animations = g_slist_prepend (values->animations, g_object_ref (animation));
413 animation = _gtk_css_transition_new (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);
424 static GtkStyleAnimation *
425 gtk_css_computed_values_find_animation (GtkCssComputedValues *values,
430 for (list = values->animations; list; list = list->next)
432 if (!GTK_IS_CSS_ANIMATION (list->data))
435 if (g_str_equal (_gtk_css_animation_get_name (list->data), name))
443 gtk_css_computed_values_create_css_animations (GtkCssComputedValues *values,
444 GtkCssComputedValues *parent_values,
446 GtkStyleProviderPrivate *provider,
447 GtkCssComputedValues *source)
449 GtkCssValue *durations, *delays, *timing_functions, *animations;
450 GtkCssValue *iteration_counts, *directions, *play_states, *fill_modes;
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);
462 for (i = 0; i < _gtk_css_array_value_get_n_values (animations); i++)
464 GtkStyleAnimation *animation;
465 GtkCssKeyframes *keyframes;
468 name = _gtk_css_ident_value_get (_gtk_css_array_value_get_nth (animations, i));
469 if (g_ascii_strcasecmp (name, "none") == 0)
472 animation = gtk_css_computed_values_find_animation (values, name);
477 animation = gtk_css_computed_values_find_animation (source, name);
481 animation = _gtk_css_animation_copy (GTK_CSS_ANIMATION (animation),
483 _gtk_css_play_state_value_get (_gtk_css_array_value_get_nth (play_states, i)));
487 keyframes = _gtk_style_provider_private_get_keyframes (provider, name);
488 if (keyframes == NULL)
491 keyframes = _gtk_css_keyframes_compute (keyframes, provider, values, parent_values);
493 animation = _gtk_css_animation_new (name,
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));
504 values->animations = g_slist_prepend (values->animations, animation);
511 _gtk_css_computed_values_create_animations (GtkCssComputedValues *values,
512 GtkCssComputedValues *parent_values,
514 GtkStyleProviderPrivate *provider,
515 GtkCssComputedValues *source)
518 gtk_css_computed_values_create_css_transitions (values, timestamp, source);
519 gtk_css_computed_values_create_css_animations (values, parent_values, timestamp, provider, source);
523 _gtk_css_computed_values_advance (GtkCssComputedValues *values,
527 GPtrArray *old_computed_values;
531 g_return_val_if_fail (GTK_IS_CSS_COMPUTED_VALUES (values), NULL);
532 g_return_val_if_fail (timestamp >= values->current_time, NULL);
534 values->current_time = timestamp;
535 old_computed_values = values->animated_values;
536 values->animated_values = NULL;
538 list = values->animations;
541 GtkStyleAnimation *animation = list->data;
545 _gtk_style_animation_set_values (animation,
547 GTK_CSS_COMPUTED_VALUES (values));
549 if (_gtk_style_animation_is_finished (animation, timestamp))
551 values->animations = g_slist_remove (values->animations, animation);
552 g_object_unref (animation);
556 /* figure out changes */
557 changed = _gtk_bitmask_new ();
559 for (i = 0; i < GTK_CSS_PROPERTY_N_PROPERTIES; i++)
561 GtkCssValue *old_animated, *new_animated;
563 old_animated = old_computed_values && i < old_computed_values->len ? g_ptr_array_index (old_computed_values, i) : NULL;
564 new_animated = values->animated_values && i < values->animated_values->len ? g_ptr_array_index (values->animated_values, i) : NULL;
566 if (!_gtk_css_value_equal0 (old_animated, new_animated))
567 changed = _gtk_bitmask_set (changed, i, TRUE);
570 if (old_computed_values)
571 g_ptr_array_unref (old_computed_values);
577 _gtk_css_computed_values_is_static (GtkCssComputedValues *values)
581 g_return_val_if_fail (GTK_IS_CSS_COMPUTED_VALUES (values), TRUE);
583 for (list = values->animations; list; list = list->next)
585 if (!_gtk_style_animation_is_static (list->data, values->current_time))
593 _gtk_css_computed_values_cancel_animations (GtkCssComputedValues *values)
595 g_return_if_fail (GTK_IS_CSS_COMPUTED_VALUES (values));
597 if (values->animated_values)
599 g_ptr_array_unref (values->animated_values);
600 values->animated_values = NULL;
603 g_slist_free_full (values->animations, g_object_unref);
604 values->animations = NULL;