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stylecontext: Add GtkCssAnimatedValues

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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.
This commit is contained in:
Benjamin Otte 2012-04-11 16:15:45 +02:00
parent 9c57b96f56
commit 632a84af8c
3 changed files with 373 additions and 0 deletions
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2
gtk/Makefile.am
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@ -422,6 +422,7 @@ gtk_private_h_sources = \
gtkcolorscaleprivate.h \
gtkcolorchooserprivate.h \
gtkcontainerprivate.h \
gtkcssanimatedvaluesprivate.h \
gtkcssarrayvalueprivate.h \
gtkcssbgsizevalueprivate.h \
gtkcssbordervalueprivate.h \
@ -637,6 +638,7 @@ gtk_base_c_sources = \
gtkcombobox.c \
gtkcomboboxtext.c \
gtkcontainer.c \
gtkcssanimatedvalues.c \
gtkcssarrayvalue.c \
gtkcssbgsizevalue.c \
gtkcssbordervalue.c \

307
gtk/gtkcssanimatedvalues.c Normal file
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@ -0,0 +1,307 @@
/*
* Copyright © 2012 Red Hat Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
*
* Authors: Benjamin Otte <otte@gnome.org>
*/
#include "config.h"
#include "gtkcssanimatedvaluesprivate.h"
#include "gtkcssarrayvalueprivate.h"
#include "gtkcssnumbervalueprivate.h"
#include "gtkcssshorthandpropertyprivate.h"
#include "gtkcssstringvalueprivate.h"
#include "gtkcssstylepropertyprivate.h"
#include "gtkcsstransitionprivate.h"
#include "gtkstyleanimationprivate.h"
#include "gtkstylepropertyprivate.h"
G_DEFINE_TYPE (GtkCssAnimatedValues, _gtk_css_animated_values, GTK_TYPE_CSS_COMPUTED_VALUES)
static void
gtk_css_animated_values_dispose (GObject *object)
{
GtkCssAnimatedValues *values = GTK_CSS_ANIMATED_VALUES (object);
g_clear_object (&values->computed);
g_slist_free_full (values->animations, g_object_unref);
values->animations = NULL;
G_OBJECT_CLASS (_gtk_css_animated_values_parent_class)->dispose (object);
}
static void
_gtk_css_animated_values_class_init (GtkCssAnimatedValuesClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
object_class->dispose = gtk_css_animated_values_dispose;
}
static void
_gtk_css_animated_values_init (GtkCssAnimatedValues *animated_values)
{
}
/* TRANSITIONS */
typedef struct _TransitionInfo TransitionInfo;
struct _TransitionInfo {
guint index; /* index into value arrays */
gboolean pending; /* TRUE if we still need to handle it */
};
static void
transition_info_add (TransitionInfo infos[GTK_CSS_PROPERTY_N_PROPERTIES],
GtkStyleProperty *property,
guint index)
{
if (property == NULL)
{
guint i;
for (i = 0; i < _gtk_css_style_property_get_n_properties (); i++)
{
GtkCssStyleProperty *prop = _gtk_css_style_property_lookup_by_id (i);
transition_info_add (infos, GTK_STYLE_PROPERTY (prop), index);
}
}
else if (GTK_IS_CSS_SHORTHAND_PROPERTY (property))
{
GtkCssShorthandProperty *shorthand = GTK_CSS_SHORTHAND_PROPERTY (property);
guint i;
for (i = 0; i < _gtk_css_shorthand_property_get_n_subproperties (shorthand); i++)
{
GtkCssStyleProperty *prop = _gtk_css_shorthand_property_get_subproperty (shorthand, i);
transition_info_add (infos, GTK_STYLE_PROPERTY (prop), index);
}
}
else if (GTK_IS_CSS_STYLE_PROPERTY (property))
{
guint id;
if (!_gtk_css_style_property_is_animated (GTK_CSS_STYLE_PROPERTY (property)))
return;
id = _gtk_css_style_property_get_id (GTK_CSS_STYLE_PROPERTY (property));
g_assert (id < GTK_CSS_PROPERTY_N_PROPERTIES);
infos[id].index = index;
infos[id].pending = TRUE;
}
else
{
g_assert_not_reached ();
}
}
static void
transition_infos_set (TransitionInfo infos[GTK_CSS_PROPERTY_N_PROPERTIES],
GtkCssValue *transitions)
{
guint i;
for (i = 0; i < _gtk_css_array_value_get_n_values (transitions); i++)
{
GtkStyleProperty *property;
GtkCssValue *prop_value;
prop_value = _gtk_css_array_value_get_nth (transitions, i);
if (g_ascii_strcasecmp (_gtk_css_ident_value_get (prop_value), "all") == 0)
property = NULL;
else
{
property = _gtk_style_property_lookup (_gtk_css_ident_value_get (prop_value));
if (property == NULL)
continue;
}
transition_info_add (infos, property, i);
}
}
static GtkStyleAnimation *
gtk_css_animated_values_find_transition (GtkCssAnimatedValues *values,
guint property_id)
{
GSList *list;
for (list = values->animations; list; list = list->next)
{
if (!GTK_IS_CSS_TRANSITION (list->data))
continue;
if (_gtk_css_transition_get_property (list->data) == property_id)
return list->data;
}
return NULL;
}
static void
gtk_css_animated_values_start_transitions (GtkCssAnimatedValues *values,
gint64 timestamp,
GtkCssComputedValues *source)
{
TransitionInfo transitions[GTK_CSS_PROPERTY_N_PROPERTIES] = { { 0, } };
GtkCssComputedValues *source_computed, *computed;
GtkCssValue *durations, *delays, *timing_functions;
guint i;
computed = GTK_CSS_COMPUTED_VALUES (values);
if (GTK_IS_CSS_ANIMATED_VALUES (source))
source_computed = GTK_CSS_ANIMATED_VALUES (source)->computed;
else
source_computed = source;
transition_infos_set (transitions, _gtk_css_computed_values_get_value (computed, GTK_CSS_PROPERTY_TRANSITION_PROPERTY));
durations = _gtk_css_computed_values_get_value (computed, GTK_CSS_PROPERTY_TRANSITION_DURATION);
delays = _gtk_css_computed_values_get_value (computed, GTK_CSS_PROPERTY_TRANSITION_DELAY);
timing_functions = _gtk_css_computed_values_get_value (computed, GTK_CSS_PROPERTY_TRANSITION_TIMING_FUNCTION);
for (i = 0; i < GTK_CSS_PROPERTY_N_PROPERTIES; i++)
{
GtkStyleAnimation *animation;
GtkCssValue *start, *end;
double duration, delay;
if (!transitions[i].pending)
continue;
duration = _gtk_css_number_value_get (_gtk_css_array_value_get_nth (durations, transitions[i].index), 100);
delay = _gtk_css_number_value_get (_gtk_css_array_value_get_nth (delays, transitions[i].index), 100);
if (duration + delay == 0.0)
continue;
start = _gtk_css_computed_values_get_value (source_computed, i);
end = _gtk_css_computed_values_get_value (values->computed, i);
if (_gtk_css_value_equal (start, end))
{
if (GTK_IS_CSS_ANIMATED_VALUES (source))
{
animation = gtk_css_animated_values_find_transition (GTK_CSS_ANIMATED_VALUES (source), i);
if (animation)
values->animations = g_slist_prepend (values->animations, g_object_ref (animation));
}
}
else
{
animation = _gtk_css_transition_new (i,
start,
end,
_gtk_css_array_value_get_nth (timing_functions, i),
timestamp + delay * G_USEC_PER_SEC,
timestamp + (delay + duration) * G_USEC_PER_SEC);
values->animations = g_slist_prepend (values->animations, animation);
}
}
}
/* PUBLIC API */
static void
gtk_css_animated_values_start_animations (GtkCssAnimatedValues *values,
gint64 timestamp,
GtkCssComputedValues *source)
{
gtk_css_animated_values_start_transitions (values, timestamp, source);
}
GtkCssComputedValues *
_gtk_css_animated_values_new (GtkCssComputedValues *computed,
GtkCssComputedValues *source,
gint64 timestamp)
{
GtkCssAnimatedValues *values;
GtkCssValue *value;
GtkBitmask *ignore;
guint i;
g_return_val_if_fail (GTK_IS_CSS_COMPUTED_VALUES (computed), NULL);
g_return_val_if_fail (GTK_IS_CSS_COMPUTED_VALUES (source), NULL);
values = g_object_new (GTK_TYPE_CSS_ANIMATED_VALUES, NULL);
values->computed = g_object_ref (computed);
for (i = 0; ; i++)
{
value = _gtk_css_computed_values_get_value (computed, i);
if (value == NULL)
break;
_gtk_css_computed_values_set_value (GTK_CSS_COMPUTED_VALUES (values),
i,
value,
_gtk_css_computed_values_get_section (computed, i));
}
gtk_css_animated_values_start_animations (values, timestamp, source);
ignore = _gtk_css_animated_values_advance (values, timestamp);
_gtk_bitmask_free (ignore);
return GTK_CSS_COMPUTED_VALUES (values);
}
GtkBitmask *
_gtk_css_animated_values_advance (GtkCssAnimatedValues *values,
gint64 timestamp)
{
GtkBitmask *changed;
GSList *list;
g_return_val_if_fail (GTK_IS_CSS_ANIMATED_VALUES (values), NULL);
g_return_val_if_fail (timestamp >= values->current_time, NULL);
changed = _gtk_bitmask_new ();
values->current_time = timestamp;
list = values->animations;
while (list)
{
GtkStyleAnimation *animation = list->data;
list = list->next;
changed = _gtk_style_animation_set_values (animation,
changed,
timestamp,
GTK_CSS_COMPUTED_VALUES (values));
if (_gtk_style_animation_is_finished (animation, timestamp))
{
values->animations = g_slist_remove (values->animations, animation);
g_object_unref (animation);
}
}
return changed;
}
gboolean
_gtk_css_animated_values_is_finished (GtkCssAnimatedValues *values)
{
g_return_val_if_fail (GTK_IS_CSS_ANIMATED_VALUES (values), TRUE);
return values->animations == NULL;
}

64
gtk/gtkcssanimatedvaluesprivate.h Normal file
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@ -0,0 +1,64 @@
/*
* Copyright © 2012 Red Hat Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
*
* Authors: Benjamin Otte <otte@gnome.org>
*/
#ifndef __GTK_CSS_ANIMATED_VALUES_PRIVATE_H__
#define __GTK_CSS_ANIMATED_VALUES_PRIVATE_H__
#include "gtk/gtkcsscomputedvaluesprivate.h"
G_BEGIN_DECLS
#define GTK_TYPE_CSS_ANIMATED_VALUES (_gtk_css_animated_values_get_type ())
#define GTK_CSS_ANIMATED_VALUES(obj) (G_TYPE_CHECK_INSTANCE_CAST (obj, GTK_TYPE_CSS_ANIMATED_VALUES, GtkCssAnimatedValues))
#define GTK_CSS_ANIMATED_VALUES_CLASS(cls) (G_TYPE_CHECK_CLASS_CAST (cls, GTK_TYPE_CSS_ANIMATED_VALUES, GtkCssAnimatedValuesClass))
#define GTK_IS_CSS_ANIMATED_VALUES(obj) (G_TYPE_CHECK_INSTANCE_TYPE (obj, GTK_TYPE_CSS_ANIMATED_VALUES))
#define GTK_IS_CSS_ANIMATED_VALUES_CLASS(obj) (G_TYPE_CHECK_CLASS_TYPE (obj, GTK_TYPE_CSS_ANIMATED_VALUES))
#define GTK_CSS_ANIMATED_VALUES_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GTK_TYPE_CSS_ANIMATED_VALUES, GtkCssAnimatedValuesClass))
typedef struct _GtkCssAnimatedValues GtkCssAnimatedValues;
typedef struct _GtkCssAnimatedValuesClass GtkCssAnimatedValuesClass;
struct _GtkCssAnimatedValues
{
GtkCssComputedValues parent;
gint64 current_time; /* the current time in our world */
GtkCssComputedValues *computed; /* the computed values we'd have without animations */
GSList *animations; /* the running animations */
};
struct _GtkCssAnimatedValuesClass
{
GtkCssComputedValuesClass parent_class;
};
GType _gtk_css_animated_values_get_type (void) G_GNUC_CONST;
GtkCssComputedValues * _gtk_css_animated_values_new (GtkCssComputedValues *computed,
GtkCssComputedValues *source,
gint64 timestamp);
GtkBitmask * _gtk_css_animated_values_advance (GtkCssAnimatedValues *values,
gint64 timestamp) G_GNUC_WARN_UNUSED_RESULT;
gboolean _gtk_css_animated_values_is_finished (GtkCssAnimatedValues *values);
G_END_DECLS
#endif /* __GTK_CSS_ANIMATED_VALUES_PRIVATE_H__ */