632a84af8c
This is a GtkCssComputedValues subclass. So it's essentially a store for computed CSS values. But it can be animated by advancing it to a certain timestamp.
308 lines
9.7 KiB
C
308 lines
9.7 KiB
C
/*
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* Copyright © 2012 Red Hat Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see <http://www.gnu.org/licenses/>.
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*
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* Authors: Benjamin Otte <otte@gnome.org>
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*/
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#include "config.h"
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#include "gtkcssanimatedvaluesprivate.h"
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#include "gtkcssarrayvalueprivate.h"
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#include "gtkcssnumbervalueprivate.h"
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#include "gtkcssshorthandpropertyprivate.h"
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#include "gtkcssstringvalueprivate.h"
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#include "gtkcssstylepropertyprivate.h"
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#include "gtkcsstransitionprivate.h"
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#include "gtkstyleanimationprivate.h"
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#include "gtkstylepropertyprivate.h"
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G_DEFINE_TYPE (GtkCssAnimatedValues, _gtk_css_animated_values, GTK_TYPE_CSS_COMPUTED_VALUES)
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static void
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gtk_css_animated_values_dispose (GObject *object)
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{
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GtkCssAnimatedValues *values = GTK_CSS_ANIMATED_VALUES (object);
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g_clear_object (&values->computed);
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g_slist_free_full (values->animations, g_object_unref);
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values->animations = NULL;
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G_OBJECT_CLASS (_gtk_css_animated_values_parent_class)->dispose (object);
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}
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static void
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_gtk_css_animated_values_class_init (GtkCssAnimatedValuesClass *klass)
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{
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GObjectClass *object_class = G_OBJECT_CLASS (klass);
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object_class->dispose = gtk_css_animated_values_dispose;
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}
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static void
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_gtk_css_animated_values_init (GtkCssAnimatedValues *animated_values)
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{
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}
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/* TRANSITIONS */
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typedef struct _TransitionInfo TransitionInfo;
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struct _TransitionInfo {
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guint index; /* index into value arrays */
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gboolean pending; /* TRUE if we still need to handle it */
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};
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static void
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transition_info_add (TransitionInfo infos[GTK_CSS_PROPERTY_N_PROPERTIES],
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GtkStyleProperty *property,
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guint index)
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{
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if (property == NULL)
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{
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guint i;
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for (i = 0; i < _gtk_css_style_property_get_n_properties (); i++)
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{
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GtkCssStyleProperty *prop = _gtk_css_style_property_lookup_by_id (i);
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transition_info_add (infos, GTK_STYLE_PROPERTY (prop), index);
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}
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}
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else if (GTK_IS_CSS_SHORTHAND_PROPERTY (property))
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{
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GtkCssShorthandProperty *shorthand = GTK_CSS_SHORTHAND_PROPERTY (property);
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guint i;
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for (i = 0; i < _gtk_css_shorthand_property_get_n_subproperties (shorthand); i++)
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{
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GtkCssStyleProperty *prop = _gtk_css_shorthand_property_get_subproperty (shorthand, i);
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transition_info_add (infos, GTK_STYLE_PROPERTY (prop), index);
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}
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}
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else if (GTK_IS_CSS_STYLE_PROPERTY (property))
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{
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guint id;
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if (!_gtk_css_style_property_is_animated (GTK_CSS_STYLE_PROPERTY (property)))
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return;
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id = _gtk_css_style_property_get_id (GTK_CSS_STYLE_PROPERTY (property));
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g_assert (id < GTK_CSS_PROPERTY_N_PROPERTIES);
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infos[id].index = index;
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infos[id].pending = TRUE;
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}
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else
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{
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g_assert_not_reached ();
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}
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}
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static void
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transition_infos_set (TransitionInfo infos[GTK_CSS_PROPERTY_N_PROPERTIES],
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GtkCssValue *transitions)
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{
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guint i;
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for (i = 0; i < _gtk_css_array_value_get_n_values (transitions); i++)
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{
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GtkStyleProperty *property;
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GtkCssValue *prop_value;
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prop_value = _gtk_css_array_value_get_nth (transitions, i);
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if (g_ascii_strcasecmp (_gtk_css_ident_value_get (prop_value), "all") == 0)
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property = NULL;
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else
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{
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property = _gtk_style_property_lookup (_gtk_css_ident_value_get (prop_value));
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if (property == NULL)
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continue;
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}
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transition_info_add (infos, property, i);
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}
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}
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static GtkStyleAnimation *
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gtk_css_animated_values_find_transition (GtkCssAnimatedValues *values,
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guint property_id)
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{
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GSList *list;
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for (list = values->animations; list; list = list->next)
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{
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if (!GTK_IS_CSS_TRANSITION (list->data))
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continue;
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if (_gtk_css_transition_get_property (list->data) == property_id)
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return list->data;
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}
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return NULL;
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}
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static void
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gtk_css_animated_values_start_transitions (GtkCssAnimatedValues *values,
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gint64 timestamp,
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GtkCssComputedValues *source)
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{
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TransitionInfo transitions[GTK_CSS_PROPERTY_N_PROPERTIES] = { { 0, } };
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GtkCssComputedValues *source_computed, *computed;
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GtkCssValue *durations, *delays, *timing_functions;
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guint i;
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computed = GTK_CSS_COMPUTED_VALUES (values);
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if (GTK_IS_CSS_ANIMATED_VALUES (source))
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source_computed = GTK_CSS_ANIMATED_VALUES (source)->computed;
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else
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source_computed = source;
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transition_infos_set (transitions, _gtk_css_computed_values_get_value (computed, GTK_CSS_PROPERTY_TRANSITION_PROPERTY));
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durations = _gtk_css_computed_values_get_value (computed, GTK_CSS_PROPERTY_TRANSITION_DURATION);
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delays = _gtk_css_computed_values_get_value (computed, GTK_CSS_PROPERTY_TRANSITION_DELAY);
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timing_functions = _gtk_css_computed_values_get_value (computed, GTK_CSS_PROPERTY_TRANSITION_TIMING_FUNCTION);
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for (i = 0; i < GTK_CSS_PROPERTY_N_PROPERTIES; i++)
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{
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GtkStyleAnimation *animation;
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GtkCssValue *start, *end;
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double duration, delay;
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if (!transitions[i].pending)
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continue;
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duration = _gtk_css_number_value_get (_gtk_css_array_value_get_nth (durations, transitions[i].index), 100);
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delay = _gtk_css_number_value_get (_gtk_css_array_value_get_nth (delays, transitions[i].index), 100);
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if (duration + delay == 0.0)
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continue;
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start = _gtk_css_computed_values_get_value (source_computed, i);
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end = _gtk_css_computed_values_get_value (values->computed, i);
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if (_gtk_css_value_equal (start, end))
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{
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if (GTK_IS_CSS_ANIMATED_VALUES (source))
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{
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animation = gtk_css_animated_values_find_transition (GTK_CSS_ANIMATED_VALUES (source), i);
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if (animation)
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values->animations = g_slist_prepend (values->animations, g_object_ref (animation));
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}
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}
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else
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{
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animation = _gtk_css_transition_new (i,
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start,
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end,
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_gtk_css_array_value_get_nth (timing_functions, i),
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timestamp + delay * G_USEC_PER_SEC,
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timestamp + (delay + duration) * G_USEC_PER_SEC);
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values->animations = g_slist_prepend (values->animations, animation);
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}
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}
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}
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/* PUBLIC API */
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static void
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gtk_css_animated_values_start_animations (GtkCssAnimatedValues *values,
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gint64 timestamp,
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GtkCssComputedValues *source)
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{
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gtk_css_animated_values_start_transitions (values, timestamp, source);
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}
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GtkCssComputedValues *
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_gtk_css_animated_values_new (GtkCssComputedValues *computed,
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GtkCssComputedValues *source,
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gint64 timestamp)
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{
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GtkCssAnimatedValues *values;
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GtkCssValue *value;
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GtkBitmask *ignore;
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guint i;
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g_return_val_if_fail (GTK_IS_CSS_COMPUTED_VALUES (computed), NULL);
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g_return_val_if_fail (GTK_IS_CSS_COMPUTED_VALUES (source), NULL);
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values = g_object_new (GTK_TYPE_CSS_ANIMATED_VALUES, NULL);
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values->computed = g_object_ref (computed);
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for (i = 0; ; i++)
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{
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value = _gtk_css_computed_values_get_value (computed, i);
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if (value == NULL)
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break;
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_gtk_css_computed_values_set_value (GTK_CSS_COMPUTED_VALUES (values),
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i,
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value,
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_gtk_css_computed_values_get_section (computed, i));
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}
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gtk_css_animated_values_start_animations (values, timestamp, source);
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ignore = _gtk_css_animated_values_advance (values, timestamp);
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_gtk_bitmask_free (ignore);
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return GTK_CSS_COMPUTED_VALUES (values);
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}
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GtkBitmask *
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_gtk_css_animated_values_advance (GtkCssAnimatedValues *values,
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gint64 timestamp)
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{
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GtkBitmask *changed;
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GSList *list;
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g_return_val_if_fail (GTK_IS_CSS_ANIMATED_VALUES (values), NULL);
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g_return_val_if_fail (timestamp >= values->current_time, NULL);
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changed = _gtk_bitmask_new ();
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values->current_time = timestamp;
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list = values->animations;
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while (list)
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{
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GtkStyleAnimation *animation = list->data;
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list = list->next;
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changed = _gtk_style_animation_set_values (animation,
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changed,
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timestamp,
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GTK_CSS_COMPUTED_VALUES (values));
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if (_gtk_style_animation_is_finished (animation, timestamp))
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{
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values->animations = g_slist_remove (values->animations, animation);
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g_object_unref (animation);
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}
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}
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return changed;
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}
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gboolean
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_gtk_css_animated_values_is_finished (GtkCssAnimatedValues *values)
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{
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g_return_val_if_fail (GTK_IS_CSS_ANIMATED_VALUES (values), TRUE);
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return values->animations == NULL;
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}
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