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// Copyright 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include <unordered_map>
#include "base/macros.h"
#include "base/memory/ref_counted.h"
#include "base/memory/scoped_ptr.h"
#include "base/time/time.h"
#include "cc/base/cc_export.h"
namespace cc {
class AnimationEvents;
class LayerAnimationController;
class CC_EXPORT AnimationRegistrar {
using AnimationControllerMap =
std::unordered_map<int, LayerAnimationController*>;
static scoped_ptr<AnimationRegistrar> Create() {
return make_scoped_ptr(new AnimationRegistrar());
virtual ~AnimationRegistrar();
// If an animation has been registered for the given id, return it. Otherwise
// creates a new one and returns a scoped_refptr to it.
scoped_refptr<LayerAnimationController> GetAnimationControllerForId(int id);
// Registers the given animation controller as active. An active animation
// controller is one that has a running animation that needs to be ticked.
void DidActivateAnimationController(LayerAnimationController* controller);
// Unregisters the given animation controller. When this happens, the
// animation controller will no longer be ticked (since it's not active). It
// is not an error to call this function with a deactivated controller.
void DidDeactivateAnimationController(LayerAnimationController* controller);
// Registers the given controller as alive.
void RegisterAnimationController(LayerAnimationController* controller);
// Unregisters the given controller as alive.
void UnregisterAnimationController(LayerAnimationController* controller);
const AnimationControllerMap& active_animation_controllers_for_testing()
const {
return active_animation_controllers_;
const AnimationControllerMap& all_animation_controllers_for_testing() const {
return all_animation_controllers_;
void set_supports_scroll_animations(bool supports_scroll_animations) {
supports_scroll_animations_ = supports_scroll_animations;
bool supports_scroll_animations() { return supports_scroll_animations_; }
bool needs_animate_layers() const {
return !active_animation_controllers_.empty();
bool ActivateAnimations();
bool AnimateLayers(base::TimeTicks monotonic_time);
bool UpdateAnimationState(bool start_ready_animations,
AnimationEvents* events);
scoped_ptr<AnimationEvents> CreateEvents();
void SetAnimationEvents(scoped_ptr<AnimationEvents> events);
AnimationControllerMap active_animation_controllers_;
AnimationControllerMap all_animation_controllers_;
bool supports_scroll_animations_;
} // namespace cc