Commit 229b6fe1 authored by Benjamin Otte's avatar Benjamin Otte

css: Add animation support

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.
parent 206aa209
......@@ -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 \
......
......@@ -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);
......
......@@ -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;
......
/*
* 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;
}
/*
* 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__ */
......@@ -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)))
{
......
Markdown is supported
0% or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment