forked from AuroraMiddleware/gtk
a970ba5ef6
Because of our port of css animation and css transition to progress tracker, we should not think of animated styles as immutable objects that can map any timestamp to css values. Rather, timestamps can correspond to different values depending on the value of GTK_SLOWDOWN over the course of the animation. To keep animated styles and style animations totally immutable, we will not share styleanimations between animatedstyles, and make a new copy of a styleanimation for each timestamp.
239 lines
7.5 KiB
C
239 lines
7.5 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 "gtkcssanimationprivate.h"
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#include "gtkcsseasevalueprivate.h"
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#include "gtkprogresstrackerprivate.h"
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#include <math.h>
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G_DEFINE_TYPE (GtkCssAnimation, _gtk_css_animation, GTK_TYPE_STYLE_ANIMATION)
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static gboolean
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gtk_css_animation_is_executing (GtkCssAnimation *animation)
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{
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GtkProgressState state = gtk_progress_tracker_get_state (&animation->tracker);
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switch (animation->fill_mode)
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{
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case GTK_CSS_FILL_NONE:
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return state == GTK_PROGRESS_STATE_DURING;
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case GTK_CSS_FILL_FORWARDS:
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return state != GTK_PROGRESS_STATE_BEFORE;
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case GTK_CSS_FILL_BACKWARDS:
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return state != GTK_PROGRESS_STATE_AFTER;
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case GTK_CSS_FILL_BOTH:
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return TRUE;
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default:
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g_return_val_if_reached (FALSE);
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}
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}
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static double
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gtk_css_animation_get_progress (GtkCssAnimation *animation)
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{
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gboolean reverse, odd_iteration;
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gint cycle = gtk_progress_tracker_get_iteration_cycle (&animation->tracker);
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odd_iteration = cycle % 2 > 0;
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switch (animation->direction)
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{
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case GTK_CSS_DIRECTION_NORMAL:
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reverse = FALSE;
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break;
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case GTK_CSS_DIRECTION_REVERSE:
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reverse = TRUE;
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break;
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case GTK_CSS_DIRECTION_ALTERNATE:
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reverse = odd_iteration;
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break;
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case GTK_CSS_DIRECTION_ALTERNATE_REVERSE:
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reverse = !odd_iteration;
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break;
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default:
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g_return_val_if_reached (0.0);
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}
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return gtk_progress_tracker_get_progress (&animation->tracker, reverse);
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}
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GtkStyleAnimation *
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gtk_css_animation_advance (GtkStyleAnimation *style_animation,
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gint64 timestamp)
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{
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GtkCssAnimation *animation = GTK_CSS_ANIMATION (style_animation);
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return _gtk_css_animation_advance_with_play_state (animation,
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timestamp,
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animation->play_state);
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}
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static void
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gtk_css_animation_apply_values (GtkStyleAnimation *style_animation,
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GtkCssAnimatedStyle *style)
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{
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GtkCssAnimation *animation = GTK_CSS_ANIMATION (style_animation);
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double progress;
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guint i;
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if (!gtk_css_animation_is_executing (animation))
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return;
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progress = gtk_css_animation_get_progress (animation);
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progress = _gtk_css_ease_value_transform (animation->ease, progress);
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for (i = 0; i < _gtk_css_keyframes_get_n_properties (animation->keyframes); i++)
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{
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GtkCssValue *value;
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guint property_id;
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property_id = _gtk_css_keyframes_get_property_id (animation->keyframes, i);
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value = _gtk_css_keyframes_get_value (animation->keyframes,
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i,
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progress,
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gtk_css_animated_style_get_intrinsic_value (style, property_id));
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gtk_css_animated_style_set_animated_value (style, property_id, value);
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_gtk_css_value_unref (value);
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}
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}
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static gboolean
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gtk_css_animation_is_finished (GtkStyleAnimation *style_animation)
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{
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return FALSE;
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}
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static gboolean
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gtk_css_animation_is_static (GtkStyleAnimation *style_animation)
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{
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GtkCssAnimation *animation = GTK_CSS_ANIMATION (style_animation);
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if (animation->play_state == GTK_CSS_PLAY_STATE_PAUSED)
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return TRUE;
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return gtk_progress_tracker_get_state (&animation->tracker) == GTK_PROGRESS_STATE_AFTER;
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}
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static void
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gtk_css_animation_finalize (GObject *object)
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{
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GtkCssAnimation *animation = GTK_CSS_ANIMATION (object);
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g_free (animation->name);
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_gtk_css_keyframes_unref (animation->keyframes);
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_gtk_css_value_unref (animation->ease);
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G_OBJECT_CLASS (_gtk_css_animation_parent_class)->finalize (object);
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}
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static void
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_gtk_css_animation_class_init (GtkCssAnimationClass *klass)
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{
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GObjectClass *object_class = G_OBJECT_CLASS (klass);
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GtkStyleAnimationClass *animation_class = GTK_STYLE_ANIMATION_CLASS (klass);
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object_class->finalize = gtk_css_animation_finalize;
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animation_class->advance = gtk_css_animation_advance;
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animation_class->apply_values = gtk_css_animation_apply_values;
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animation_class->is_finished = gtk_css_animation_is_finished;
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animation_class->is_static = gtk_css_animation_is_static;
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}
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static void
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_gtk_css_animation_init (GtkCssAnimation *animation)
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{
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}
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GtkStyleAnimation *
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_gtk_css_animation_new (const char *name,
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GtkCssKeyframes *keyframes,
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gint64 timestamp,
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gint64 delay_us,
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gint64 duration_us,
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GtkCssValue *ease,
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GtkCssDirection direction,
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GtkCssPlayState play_state,
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GtkCssFillMode fill_mode,
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double iteration_count)
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{
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GtkCssAnimation *animation;
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g_return_val_if_fail (name != NULL, NULL);
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g_return_val_if_fail (keyframes != NULL, NULL);
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g_return_val_if_fail (ease != NULL, NULL);
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g_return_val_if_fail (iteration_count >= 0, NULL);
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animation = g_object_new (GTK_TYPE_CSS_ANIMATION, NULL);
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animation->name = g_strdup (name);
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animation->keyframes = _gtk_css_keyframes_ref (keyframes);
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animation->ease = _gtk_css_value_ref (ease);
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animation->direction = direction;
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animation->play_state = play_state;
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animation->fill_mode = fill_mode;
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gtk_progress_tracker_start (&animation->tracker, duration_us, delay_us, iteration_count);
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if (animation->play_state == GTK_CSS_PLAY_STATE_PAUSED)
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gtk_progress_tracker_skip_frame (&animation->tracker, timestamp);
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else
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gtk_progress_tracker_advance_frame (&animation->tracker, timestamp);
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return GTK_STYLE_ANIMATION (animation);
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}
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const char *
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_gtk_css_animation_get_name (GtkCssAnimation *animation)
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{
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g_return_val_if_fail (GTK_IS_CSS_ANIMATION (animation), NULL);
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return animation->name;
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}
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GtkStyleAnimation *
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_gtk_css_animation_advance_with_play_state (GtkCssAnimation *source,
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gint64 timestamp,
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GtkCssPlayState play_state)
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{
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GtkCssAnimation *animation;
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g_return_val_if_fail (GTK_IS_CSS_ANIMATION (source), NULL);
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animation = g_object_new (GTK_TYPE_CSS_ANIMATION, NULL);
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animation->name = g_strdup (source->name);
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animation->keyframes = _gtk_css_keyframes_ref (source->keyframes);
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animation->ease = _gtk_css_value_ref (source->ease);
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animation->direction = source->direction;
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animation->play_state = play_state;
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animation->fill_mode = source->fill_mode;
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gtk_progress_tracker_init_copy (&source->tracker, &animation->tracker);
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if (animation->play_state == GTK_CSS_PLAY_STATE_PAUSED)
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gtk_progress_tracker_skip_frame (&animation->tracker, timestamp);
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else
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gtk_progress_tracker_advance_frame (&animation->tracker, timestamp);
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return GTK_STYLE_ANIMATION (animation);
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}
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