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css: Add animation support

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This adds the GtkCssAnimation class and the code needed to hook it into
GtkStyleContext. It takes the values out of the CSS "animation"
properties and does animations. See
  http://dev.w3.org/csswg/css3-animations/
for details.

Note that the code for starting and stopping animations with widget
visibility doesn't work yet.
This commit is contained in:
Benjamin Otte 2012-09-10 13:57:56 +02:00
parent 206aa209ae
commit 229b6fe17a
6 changed files with 380 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
gtk/Makefile.am
View File

@ -427,6 +427,7 @@ gtk_private_h_sources = \
gtkcolorchooserprivate.h \
gtkcontainerprivate.h \
gtkcssanimatedvaluesprivate.h \
gtkcssanimationprivate.h \
gtkcssarrayvalueprivate.h \
gtkcssbgsizevalueprivate.h \
gtkcssbordervalueprivate.h \
@ -648,6 +649,7 @@ gtk_base_c_sources = \
gtkcomboboxtext.c \
gtkcontainer.c \
gtkcssanimatedvalues.c \
gtkcssanimation.c \
gtkcssarrayvalue.c \
gtkcssbgsizevalue.c \
gtkcssbordervalue.c \

89
gtk/gtkcssanimatedvalues.c
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@ -21,14 +21,18 @@
#include "gtkcssanimatedvaluesprivate.h"
#include "gtkcssanimationprivate.h"
#include "gtkcssarrayvalueprivate.h"
#include "gtkcssenumvalueprivate.h"
#include "gtkcssnumbervalueprivate.h"
#include "gtkcssshorthandpropertyprivate.h"
#include "gtkcssstringvalueprivate.h"
#include "gtkcssstylepropertyprivate.h"
#include "gtkcsstransitionprivate.h"
#include "gtkstyleanimationprivate.h"
#include "gtkstylepropertiesprivate.h"
#include "gtkstylepropertyprivate.h"
#include "gtkstyleproviderprivate.h"
G_DEFINE_TYPE (GtkCssAnimatedValues, _gtk_css_animated_values, GTK_TYPE_CSS_COMPUTED_VALUES)
@ -176,7 +180,6 @@ gtk_css_animated_values_start_transitions (GtkCssAnimatedValues *values,
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;
@ -215,20 +218,97 @@ gtk_css_animated_values_start_transitions (GtkCssAnimatedValues *values,
}
}
static GtkStyleAnimation *
gtk_css_animated_values_find_animation (GtkCssAnimatedValues *values,
const char *name)
{
GSList *list;
for (list = values->animations; list; list = list->next)
{
if (!GTK_IS_CSS_ANIMATION (list->data))
continue;
if (g_str_equal (_gtk_css_animation_get_name (list->data), name))
return list->data;
}
return NULL;
}
static void
gtk_css_animated_values_start_css_animations (GtkCssAnimatedValues *values,
gint64 timestamp,
GtkStyleContext *context)
{
GtkCssComputedValues *computed;
GtkStyleProviderPrivate *provider;
GtkCssValue *durations, *delays, *timing_functions, *animations;
GtkCssValue *iteration_counts, *directions, *play_states, *fill_modes;
guint i;
computed = GTK_CSS_COMPUTED_VALUES (values);
provider = _gtk_style_context_get_style_provider (context);
animations = _gtk_css_computed_values_get_value (computed, GTK_CSS_PROPERTY_ANIMATION_NAME);
durations = _gtk_css_computed_values_get_value (computed, GTK_CSS_PROPERTY_ANIMATION_DURATION);
delays = _gtk_css_computed_values_get_value (computed, GTK_CSS_PROPERTY_ANIMATION_DELAY);
timing_functions = _gtk_css_computed_values_get_value (computed, GTK_CSS_PROPERTY_ANIMATION_TIMING_FUNCTION);
iteration_counts = _gtk_css_computed_values_get_value (computed, GTK_CSS_PROPERTY_ANIMATION_ITERATION_COUNT);
directions = _gtk_css_computed_values_get_value (computed, GTK_CSS_PROPERTY_ANIMATION_DIRECTION);
play_states = _gtk_css_computed_values_get_value (computed, GTK_CSS_PROPERTY_ANIMATION_PLAY_STATE);
fill_modes = _gtk_css_computed_values_get_value (computed, GTK_CSS_PROPERTY_ANIMATION_FILL_MODE);
for (i = 0; i < _gtk_css_array_value_get_n_values (animations); i++)
{
GtkStyleAnimation *animation;
GtkCssKeyframes *keyframes;
const char *name;
name = _gtk_css_ident_value_get (_gtk_css_array_value_get_nth (animations, i));
if (g_ascii_strcasecmp (name, "none") == 0)
continue;
animation = gtk_css_animated_values_find_animation (values, name);
if (animation)
continue;
keyframes = _gtk_style_provider_private_get_keyframes (provider, name);
if (keyframes == NULL)
continue;
keyframes = _gtk_css_keyframes_compute (keyframes, context);
animation = _gtk_css_animation_new (name,
keyframes,
timestamp + _gtk_css_number_value_get (_gtk_css_array_value_get_nth (delays, i), 100) * G_USEC_PER_SEC,
_gtk_css_number_value_get (_gtk_css_array_value_get_nth (durations, i), 100) * G_USEC_PER_SEC,
_gtk_css_array_value_get_nth (timing_functions, i),
_gtk_css_direction_value_get (_gtk_css_array_value_get_nth (directions, i)),
_gtk_css_play_state_value_get (_gtk_css_array_value_get_nth (play_states, i)),
_gtk_css_fill_mode_value_get (_gtk_css_array_value_get_nth (fill_modes, i)),
_gtk_css_number_value_get (_gtk_css_array_value_get_nth (iteration_counts, i), 100));
values->animations = g_slist_prepend (values->animations, animation);
}
}
/* PUBLIC API */
static void
gtk_css_animated_values_start_animations (GtkCssAnimatedValues *values,
gint64 timestamp,
GtkCssComputedValues *source)
GtkCssComputedValues *source,
GtkStyleContext *context)
{
gtk_css_animated_values_start_transitions (values, timestamp, source);
gtk_css_animated_values_start_css_animations (values, timestamp, context);
}
GtkCssComputedValues *
_gtk_css_animated_values_new (GtkCssComputedValues *computed,
GtkCssComputedValues *source,
gint64 timestamp)
gint64 timestamp,
GtkStyleContext *context)
{
GtkCssAnimatedValues *values;
GtkCssValue *value;
@ -237,6 +317,7 @@ _gtk_css_animated_values_new (GtkCssComputedValues *computed,
g_return_val_if_fail (GTK_IS_CSS_COMPUTED_VALUES (computed), NULL);
g_return_val_if_fail (GTK_IS_CSS_COMPUTED_VALUES (source), NULL);
g_return_val_if_fail (GTK_IS_STYLE_CONTEXT (context), NULL);
values = g_object_new (GTK_TYPE_CSS_ANIMATED_VALUES, NULL);
@ -264,7 +345,7 @@ _gtk_css_animated_values_new (GtkCssComputedValues *computed,
GTK_CSS_COMPUTED_VALUES (values)->depends_on_color = _gtk_bitmask_copy (computed->depends_on_color);
GTK_CSS_COMPUTED_VALUES (values)->depends_on_font_size = _gtk_bitmask_copy (computed->depends_on_font_size);
gtk_css_animated_values_start_animations (values, timestamp, source);
gtk_css_animated_values_start_animations (values, timestamp, source, context);
ignore = _gtk_css_animated_values_advance (values, timestamp);
_gtk_bitmask_free (ignore);

3
gtk/gtkcssanimatedvaluesprivate.h
View File

@ -52,7 +52,8 @@ GType _gtk_css_animated_values_get_type (void) G_G
GtkCssComputedValues * _gtk_css_animated_values_new (GtkCssComputedValues *computed,
GtkCssComputedValues *source,
gint64 timestamp);
gint64 timestamp,
GtkStyleContext *context);
GtkBitmask * _gtk_css_animated_values_advance (GtkCssAnimatedValues *values,
gint64 timestamp) G_GNUC_WARN_UNUSED_RESULT;

214
gtk/gtkcssanimation.c Normal file
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@ -0,0 +1,214 @@
/*
* 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 "gtkcssanimationprivate.h"
#include "gtkcsseasevalueprivate.h"
#include <math.h>
G_DEFINE_TYPE (GtkCssAnimation, _gtk_css_animation, GTK_TYPE_STYLE_ANIMATION)
/* NB: Return value can be negative and +-Inf */
static double
gtk_css_animation_get_iteration (GtkCssAnimation *animation,
gint64 for_time_us)
{
gint64 elapsed;
double iterations;
elapsed = for_time_us - animation->timestamp;
iterations = (double) elapsed / animation->duration;
return iterations;
}
static gboolean
gtk_css_animation_is_executing_at_iteration (GtkCssAnimation *animation,
double iteration)
{
switch (animation->fill_mode)
{
case GTK_CSS_FILL_NONE:
return iteration >= 0 && iteration <= animation->iteration_count;
case GTK_CSS_FILL_FORWARDS:
return iteration >= 0;
case GTK_CSS_FILL_BACKWARDS:
return iteration <= animation->iteration_count;
case GTK_CSS_FILL_BOTH:
return TRUE;
default:
g_return_val_if_reached (FALSE);
}
}
static double
gtk_css_animation_get_progress_from_iteration (GtkCssAnimation *animation,
double iteration)
{
double d;
iteration = CLAMP (iteration, 0, animation->iteration_count);
switch (animation->direction)
{
case GTK_CSS_DIRECTION_NORMAL:
if (iteration == animation->iteration_count)
return 1;
else
return iteration - floor (iteration);
case GTK_CSS_DIRECTION_REVERSE:
if (iteration == animation->iteration_count)
return 1;
else
return ceil (iteration) - iteration;
case GTK_CSS_DIRECTION_ALTERNATE:
d = floor (iteration);
if (fmod (d, 2))
return iteration - d;
else
return 1 + d - iteration;
case GTK_CSS_DIRECTION_ALTERNATE_REVERSE:
d = floor (iteration);
if (fmod (d, 2))
return 1 + d - iteration;
else
return iteration - d;
default:
g_return_val_if_reached (0);
}
}
static GtkBitmask *
gtk_css_animation_set_values (GtkStyleAnimation *style_animation,
GtkBitmask *changed,
gint64 for_time_us,
GtkCssComputedValues *values)
{
GtkCssAnimation *animation = GTK_CSS_ANIMATION (style_animation);
double iteration, progress;
guint i;
iteration = gtk_css_animation_get_iteration (animation, for_time_us);
if (!gtk_css_animation_is_executing_at_iteration (animation, iteration))
return changed;
progress = gtk_css_animation_get_progress_from_iteration (animation, iteration);
progress = _gtk_css_ease_value_transform (animation->ease, progress);
for (i = 0; i < _gtk_css_keyframes_get_n_properties (animation->keyframes); i++)
{
GtkCssValue *value;
guint property_id;
property_id = _gtk_css_keyframes_get_property_id (animation->keyframes, i);
value = _gtk_css_keyframes_get_value (animation->keyframes,
i,
progress,
_gtk_css_computed_values_get_value (values, i));
/* XXX: Is using 0 correct here? */
_gtk_css_computed_values_set_value (values, property_id, value, 0, NULL);
_gtk_css_value_unref (value);
changed = _gtk_bitmask_set (changed, property_id, TRUE);
}
return changed;
}
static gboolean
gtk_css_animation_is_finished (GtkStyleAnimation *style_animation,
gint64 at_time_us)
{
return FALSE;
}
static void
gtk_css_animation_finalize (GObject *object)
{
GtkCssAnimation *animation = GTK_CSS_ANIMATION (object);
g_free (animation->name);
_gtk_css_keyframes_unref (animation->keyframes);
_gtk_css_value_unref (animation->ease);
G_OBJECT_CLASS (_gtk_css_animation_parent_class)->finalize (object);
}
static void
_gtk_css_animation_class_init (GtkCssAnimationClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
GtkStyleAnimationClass *animation_class = GTK_STYLE_ANIMATION_CLASS (klass);
object_class->finalize = gtk_css_animation_finalize;
animation_class->set_values = gtk_css_animation_set_values;
animation_class->is_finished = gtk_css_animation_is_finished;
}
static void
_gtk_css_animation_init (GtkCssAnimation *animation)
{
}
GtkStyleAnimation *
_gtk_css_animation_new (const char *name,
GtkCssKeyframes *keyframes,
gint64 start_time_us,
gint64 duration_us,
GtkCssValue *ease,
GtkCssDirection direction,
GtkCssPlayState play_state,
GtkCssFillMode fill_mode,
double iteration_count)
{
GtkCssAnimation *animation;
g_return_val_if_fail (name != NULL, NULL);
g_return_val_if_fail (keyframes != NULL, NULL);
g_return_val_if_fail (ease != NULL, NULL);
g_return_val_if_fail (iteration_count >= 0, NULL);
animation = g_object_new (GTK_TYPE_CSS_ANIMATION, NULL);
animation->name = g_strdup (name);
animation->keyframes = _gtk_css_keyframes_ref (keyframes);
animation->timestamp = start_time_us;
animation->duration = duration_us;
animation->ease = _gtk_css_value_ref (ease);
animation->direction = direction;
animation->play_state = play_state;
animation->fill_mode = fill_mode;
animation->iteration_count = iteration_count;
return GTK_STYLE_ANIMATION (animation);
}
const char *
_gtk_css_animation_get_name (GtkCssAnimation *animation)
{
g_return_val_if_fail (GTK_IS_CSS_ANIMATION (animation), NULL);
return animation->name;
}

75
gtk/gtkcssanimationprivate.h Normal file
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@ -0,0 +1,75 @@
/*
* 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_ANIMATION_PRIVATE_H__
#define __GTK_CSS_ANIMATION_PRIVATE_H__
#include "gtkstyleanimationprivate.h"
#include "gtkcsskeyframesprivate.h"
G_BEGIN_DECLS
#define GTK_TYPE_CSS_ANIMATION (_gtk_css_animation_get_type ())
#define GTK_CSS_ANIMATION(obj) (G_TYPE_CHECK_INSTANCE_CAST (obj, GTK_TYPE_CSS_ANIMATION, GtkCssAnimation))
#define GTK_CSS_ANIMATION_CLASS(cls) (G_TYPE_CHECK_CLASS_CAST (cls, GTK_TYPE_CSS_ANIMATION, GtkCssAnimationClass))
#define GTK_IS_CSS_ANIMATION(obj) (G_TYPE_CHECK_INSTANCE_TYPE (obj, GTK_TYPE_CSS_ANIMATION))
#define GTK_IS_CSS_ANIMATION_CLASS(obj) (G_TYPE_CHECK_CLASS_TYPE (obj, GTK_TYPE_CSS_ANIMATION))
#define GTK_CSS_ANIMATION_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GTK_TYPE_CSS_ANIMATION, GtkCssAnimationClass))
typedef struct _GtkCssAnimation GtkCssAnimation;
typedef struct _GtkCssAnimationClass GtkCssAnimationClass;
struct _GtkCssAnimation
{
GtkStyleAnimation parent;
char *name;
GtkCssKeyframes *keyframes;
GtkCssValue *ease;
gint64 timestamp; /* elapsed time when paused, start time when playing (can be negative) */
gint64 duration; /* duration of 1 cycle */
GtkCssDirection direction;
GtkCssPlayState play_state;
GtkCssFillMode fill_mode;
double iteration_count;
};
struct _GtkCssAnimationClass
{
GtkStyleAnimationClass parent_class;
};
GType _gtk_css_animation_get_type (void) G_GNUC_CONST;
GtkStyleAnimation * _gtk_css_animation_new (const char *name,
GtkCssKeyframes *keyframes,
gint64 start_time_us,
gint64 duration_us,
GtkCssValue *ease,
GtkCssDirection direction,
GtkCssPlayState play_state,
GtkCssFillMode fill_mode,
double iteration_count);
const char * _gtk_css_animation_get_name (GtkCssAnimation *animation);
G_END_DECLS
#endif /* __GTK_CSS_ANIMATION_PRIVATE_H__ */

3
gtk/gtkstylecontext.c
View File

@ -3057,7 +3057,8 @@ gtk_style_context_start_animations (GtkStyleContext *context,
animated = style_data_new ();
animated->store = _gtk_css_animated_values_new (style_data_lookup (context)->store,
previous,
timestamp);
timestamp,
context);
if (_gtk_css_animated_values_is_finished (GTK_CSS_ANIMATED_VALUES (animated->store)))
{