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/*
* Copyright 2015 Google Inc. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef COBALT_DOM_CSS_TRANSITIONS_ADAPTER_H_
#define COBALT_DOM_CSS_TRANSITIONS_ADAPTER_H_
#include <map>
#include "base/basictypes.h"
#include "base/compiler_specific.h"
#include "cobalt/cssom/css_transition.h"
#include "cobalt/cssom/css_transition_set.h"
#include "cobalt/cssom/property_definitions.h"
#include "cobalt/web_animations/animation.h"
#include "cobalt/web_animations/animation_timeline.h"
namespace cobalt {
namespace dom {
class DOMAnimatable;
// This class contains logic to adapt CSS Transitions to the Web Animations
// framework. It watches for CSS Transition events, and handles them by
// appropriately creating and destroying Animation objects on the target element
// and timeline.
class CSSTransitionsAdapter : public cssom::TransitionSet::EventHandler {
public:
explicit CSSTransitionsAdapter(
const scoped_refptr<dom::DOMAnimatable>& target);
~CSSTransitionsAdapter();
void OnTransitionStarted(const cssom::Transition& transition) OVERRIDE;
void OnTransitionRemoved(const cssom::Transition& transition) OVERRIDE;
private:
// The AnimationWithEventHandler struct maintains a reference to the Animation
// object and also owns an Animation::EventHandler that connects animation
// events to this CSSTransitionsAdapter object.
struct AnimationWithEventHandler {
AnimationWithEventHandler(
const scoped_refptr<web_animations::Animation>& animation,
scoped_ptr<web_animations::Animation::EventHandler> event_handler)
: animation(animation), event_handler(event_handler.Pass()) {}
~AnimationWithEventHandler() {}
scoped_refptr<web_animations::Animation> animation;
scoped_ptr<web_animations::Animation::EventHandler> event_handler;
};
typedef std::map<cssom::PropertyKey, AnimationWithEventHandler*>
PropertyValueAnimationMap;
// Called to handle Animation events. When a transition's corresponding
// animation enters the after phase, we fire the transitionend event.
void HandleAnimationEnterAfterPhase(const cssom::Transition& transition);
scoped_refptr<dom::DOMAnimatable> animatable_;
// The animation map tracks animations that were created by transitions.
// As transitions are created and removed, we update this animation map
// per property value.
PropertyValueAnimationMap animation_map_;
DISALLOW_COPY_AND_ASSIGN(CSSTransitionsAdapter);
};
} // namespace dom
} // namespace cobalt
#endif // COBALT_DOM_CSS_TRANSITIONS_ADAPTER_H_