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/*
* 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 "gtkprogresstrackerprivate.h"
#include <math.h>
static gboolean
gtk_css_animation_is_executing (GtkCssAnimation *animation)
{
GtkProgressState state = gtk_progress_tracker_get_state (&animation->tracker);
switch (animation->fill_mode)
{
case GTK_CSS_FILL_NONE:
return state == GTK_PROGRESS_STATE_DURING;
case GTK_CSS_FILL_FORWARDS:
return state != GTK_PROGRESS_STATE_BEFORE;
case GTK_CSS_FILL_BACKWARDS:
return state != GTK_PROGRESS_STATE_AFTER;
case GTK_CSS_FILL_BOTH:
return TRUE;
default:
g_return_val_if_reached (FALSE);
}
}
static double
gtk_css_animation_get_progress (GtkCssAnimation *animation)
{
gboolean reverse, odd_iteration;
int cycle = gtk_progress_tracker_get_iteration_cycle (&animation->tracker);
odd_iteration = cycle % 2 > 0;
switch (animation->direction)
{
case GTK_CSS_DIRECTION_NORMAL:
reverse = FALSE;
break;
case GTK_CSS_DIRECTION_REVERSE:
reverse = TRUE;
break;
case GTK_CSS_DIRECTION_ALTERNATE:
reverse = odd_iteration;
break;
case GTK_CSS_DIRECTION_ALTERNATE_REVERSE:
reverse = !odd_iteration;
break;
default:
g_return_val_if_reached (0.0);
}
return gtk_progress_tracker_get_progress (&animation->tracker, reverse);
}
static GtkStyleAnimation *
gtk_css_animation_advance (GtkStyleAnimation *style_animation,
gint64 timestamp)
{
GtkCssAnimation *animation = (GtkCssAnimation *)style_animation;
return _gtk_css_animation_advance_with_play_state (animation,
timestamp,
animation->play_state);
}
static void
gtk_css_animation_apply_values (GtkStyleAnimation *style_animation,
GtkCssAnimatedStyle *style)
{
GtkCssAnimation *animation = (GtkCssAnimation *)style_animation;
double progress;
guint i;
if (!gtk_css_animation_is_executing (animation))
return;
progress = gtk_css_animation_get_progress (animation);
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_animated_style_get_intrinsic_value (style, property_id));
gtk_css_animated_style_set_animated_value (style, property_id, value);
}
}
static gboolean
gtk_css_animation_is_finished (GtkStyleAnimation *style_animation)
{
return FALSE;
}
static gboolean
gtk_css_animation_is_static (GtkStyleAnimation *style_animation)
{
GtkCssAnimation *animation = (GtkCssAnimation *)style_animation;
if (animation->play_state == GTK_CSS_PLAY_STATE_PAUSED)
return TRUE;
return gtk_progress_tracker_get_state (&animation->tracker) == GTK_PROGRESS_STATE_AFTER;
}
static void
gtk_css_animation_free (GtkStyleAnimation *animation)
{
GtkCssAnimation *self = (GtkCssAnimation *)animation;
g_free (self->name);
_gtk_css_keyframes_unref (self->keyframes);
_gtk_css_value_unref (self->ease);
g_slice_free (GtkCssAnimation, self);
}
static const GtkStyleAnimationClass GTK_CSS_ANIMATION_CLASS = {
"GtkCssAnimation",
gtk_css_animation_free,
gtk_css_animation_is_finished,
gtk_css_animation_is_static,
gtk_css_animation_apply_values,
gtk_css_animation_advance,
};
GtkStyleAnimation *
_gtk_css_animation_new (const char *name,
GtkCssKeyframes *keyframes,
gint64 timestamp,
gint64 delay_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_slice_alloc (sizeof (GtkCssAnimation));
animation->parent.class = >K_CSS_ANIMATION_CLASS;
animation->parent.ref_count = 1;
animation->name = g_strdup (name);
animation->keyframes = _gtk_css_keyframes_ref (keyframes);
animation->ease = _gtk_css_value_ref (ease);
animation->direction = direction;
animation->play_state = play_state;
animation->fill_mode = fill_mode;
gtk_progress_tracker_start (&animation->tracker, duration_us, delay_us, iteration_count);
if (animation->play_state == GTK_CSS_PLAY_STATE_PAUSED)
gtk_progress_tracker_skip_frame (&animation->tracker, timestamp);
else
gtk_progress_tracker_advance_frame (&animation->tracker, timestamp);
return (GtkStyleAnimation *)animation;
}
const char *
_gtk_css_animation_get_name (GtkCssAnimation *animation)
{
return animation->name;
}
GtkStyleAnimation *
_gtk_css_animation_advance_with_play_state (GtkCssAnimation *source,
gint64 timestamp,
GtkCssPlayState play_state)
{
GtkCssAnimation *animation = g_slice_alloc (sizeof (GtkCssAnimation));
animation->parent.class = >K_CSS_ANIMATION_CLASS;
animation->parent.ref_count = 1;
animation->name = g_strdup (source->name);
animation->keyframes = _gtk_css_keyframes_ref (source->keyframes);
animation->ease = _gtk_css_value_ref (source->ease);
animation->direction = source->direction;
animation->play_state = play_state;
animation->fill_mode = source->fill_mode;
gtk_progress_tracker_init_copy (&source->tracker, &animation->tracker);
if (animation->play_state == GTK_CSS_PLAY_STATE_PAUSED)
gtk_progress_tracker_skip_frame (&animation->tracker, timestamp);
else
gtk_progress_tracker_advance_frame (&animation->tracker, timestamp);
return (GtkStyleAnimation *)animation;
}
gboolean
_gtk_css_animation_is_animation (GtkStyleAnimation *animation)
{
return animation->class == >K_CSS_ANIMATION_CLASS;
}
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