cc/animation/animation_registrar.h

   1 // Copyright 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef CC_ANIMATION_ANIMATION_REGISTRAR_H_
   6 #define CC_ANIMATION_ANIMATION_REGISTRAR_H_
   7
   8 #include "base/containers/hash_tables.h"
   9 #include "base/memory/ref_counted.h"
  10 #include "base/memory/scoped_ptr.h"
  11 #include "cc/base/cc_export.h"
  12
  13 namespace cc {
  14
  15 class LayerAnimationController;
  16
  17 class CC_EXPORT AnimationRegistrar {
  18  public:
  19   typedef base::hash_map<int, LayerAnimationController*> AnimationControllerMap;
  20
  21   static scoped_ptr<AnimationRegistrar> Create() {
  22     return make_scoped_ptr(new AnimationRegistrar());
  23   }
  24
  25   virtual ~AnimationRegistrar();
  26
  27   // If an animation has been registered for the given id, return it. Otherwise
  28   // creates a new one and returns a scoped_refptr to it.
  29   scoped_refptr<LayerAnimationController> GetAnimationControllerForId(int id);
  30
  31   // Registers the given animation controller as active. An active animation
  32   // controller is one that has a running animation that needs to be ticked.
  33   void DidActivateAnimationController(LayerAnimationController* controller);
  34
  35   // Unregisters the given animation controller. When this happens, the
  36   // animation controller will no longer be ticked (since it's not active). It
  37   // is not an error to call this function with a deactivated controller.
  38   void DidDeactivateAnimationController(LayerAnimationController* controller);
  39
  40   // Registers the given controller as alive.
  41   void RegisterAnimationController(LayerAnimationController* controller);
  42
  43   // Unregisters the given controller as alive.
  44   void UnregisterAnimationController(LayerAnimationController* controller);
  45
  46   const AnimationControllerMap& active_animation_controllers() const {
  47     return active_animation_controllers_;
  48   }
  49
  50   const AnimationControllerMap& all_animation_controllers() const {
  51     return all_animation_controllers_;
  52   }
  53
  54   void set_supports_scroll_animations(bool supports_scroll_animations) {
  55     supports_scroll_animations_ = supports_scroll_animations;
  56   }
  57
  58   bool supports_scroll_animations() { return supports_scroll_animations_; }
  59
  60  private:
  61   AnimationRegistrar();
  62
  63   AnimationControllerMap active_animation_controllers_;
  64   AnimationControllerMap all_animation_controllers_;
  65
  66   bool supports_scroll_animations_;
  67
  68   DISALLOW_COPY_AND_ASSIGN(AnimationRegistrar);
  69 };
  70
  71 }  // namespace cc
  72
  73 #endif  // CC_ANIMATION_ANIMATION_REGISTRAR_H_