gecko-dev/dom/animation/AnimationPlayer.h

/* vim: set shiftwidth=2 tabstop=8 autoindent cindent expandtab: */
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#ifndef mozilla_dom_AnimationPlayer_h
#define mozilla_dom_AnimationPlayer_h

#include <algorithm> // for std::max
#include "nsWrapperCache.h"
#include "nsCycleCollectionParticipant.h"
#include "mozilla/Attributes.h"
#include "mozilla/TimeStamp.h" // for TimeStamp, TimeDuration
#include "mozilla/dom/Animation.h" // for Animation
#include "mozilla/dom/AnimationTimeline.h" // for AnimationTimeline
#include "nsCSSProperty.h" // for nsCSSProperty

// X11 has a #define for CurrentTime.
#ifdef CurrentTime
#undef CurrentTime
#endif

struct JSContext;

namespace mozilla {
namespace dom {

class AnimationPlayer MOZ_FINAL : public nsWrapperCache
{
protected:
  virtual ~AnimationPlayer() { }

public:
  explicit AnimationPlayer(AnimationTimeline* aTimeline)
    : mPlayState(NS_STYLE_ANIMATION_PLAY_STATE_RUNNING)
    , mIsRunningOnCompositor(false)
    , mTimeline(aTimeline)
  {
    SetIsDOMBinding();
  }

  NS_INLINE_DECL_CYCLE_COLLECTING_NATIVE_REFCOUNTING(AnimationPlayer)
  NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_NATIVE_CLASS(AnimationPlayer)

  AnimationTimeline* GetParentObject() const { return mTimeline; }
  virtual JSObject* WrapObject(JSContext* aCx) MOZ_OVERRIDE;

  // AnimationPlayer methods
  Animation* GetSource() const { return mSource; }
  AnimationTimeline* Timeline() const { return mTimeline; }
  Nullable<double> GetStartTime() const;
  Nullable<double> GetCurrentTime() const;
  bool IsRunningOnCompositor() const { return mIsRunningOnCompositor; }

  void SetSource(Animation* aSource);
  void Tick();

  const nsString& Name() const {
    return mSource ? mSource->Name() : EmptyString();
  }

  bool IsPaused() const {
    return mPlayState == NS_STYLE_ANIMATION_PLAY_STATE_PAUSED;
  }

  bool IsRunning() const;

  bool HasCurrentSource() const {
    return GetSource() && GetSource()->IsCurrent();
  }

  // Return the duration since the start time of the player, taking into
  // account the pause state.  May be negative or null.
  Nullable<TimeDuration> GetCurrentTimeDuration() const;

  // The beginning of the delay period.
  Nullable<TimeDuration> mStartTime;
  Nullable<TimeDuration> mHoldTime;
  uint8_t mPlayState;
  bool mIsRunningOnCompositor;

  nsRefPtr<AnimationTimeline> mTimeline;
  nsRefPtr<Animation> mSource;
};

} // namespace dom
} // namespace mozilla

#endif // mozilla_dom_AnimationPlayer_h