text: /*
   * Copyright (C) 2008 Apple Inc. All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   * 1. Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer.
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in the
   *    documentation and/or other materials provided with the distribution.
   *
   * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
   * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
   * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
   * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
   * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
   * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
   * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
   * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
   * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   */
  
  #ifndef SMILTimeContainer_h
  #define SMILTimeContainer_h
  
  #include "core/dom/QualifiedName.h"
  #include "core/svg/animation/SMILTime.h"
  #include "platform/Timer.h"
  #include "platform/heap/Handle.h"
  #include "wtf/HashMap.h"
  #include "wtf/HashSet.h"
  #include "wtf/PassRefPtr.h"
  #include "wtf/RefCounted.h"
  #include "wtf/text/StringHash.h"
  #include "wtf/text/WTFString.h"
  
  namespace WebCore {
  
  class Document;
  class SVGElement;
  class SVGSMILElement;
  class SVGSVGElement;
  
  class SMILTimeContainer : public RefCountedWillBeGarbageCollectedFinalized<SMILTimeContainer>  {
  public:
      static PassRefPtrWillBeRawPtr<SMILTimeContainer> create(SVGSVGElement& owner) { return adoptRefWillBeNoop(new SMILTimeContainer(owner)); }
      ~SMILTimeContainer();
  
      void schedule(SVGSMILElement*, SVGElement*, const QualifiedName&);
      void unschedule(SVGSMILElement*, SVGElement*, const QualifiedName&);
      void notifyIntervalsChanged();
  
      SMILTime elapsed() const;
  
      bool isPaused() const;
      bool isStarted() const;
  
      void begin();
      void pause();
      void resume();
      void setElapsed(SMILTime);
  
      void serviceAnimations(double monotonicAnimationStartTime);
      bool hasAnimations() const;
  
      void setDocumentOrderIndexesDirty() { m_documentOrderIndexesDirty = true; }
  
      void trace(Visitor*);
  
  private:
      explicit SMILTimeContainer(SVGSVGElement& owner);
  
      enum FrameSchedulingState {
          // No frame scheduled.
          Idle,
          // Scheduled a wakeup to update the animation values.
          SynchronizeAnimations,
          // Scheduled a wakeup to trigger an animation frame.
          FutureAnimationFrame,
          // Scheduled a animation frame for continuous update.
          AnimationFrame
      };
  
      bool isTimelineRunning() const;
      void scheduleAnimationFrame(SMILTime fireTime);
      void cancelAnimationFrame();
      void wakeupTimerFired(Timer<SMILTimeContainer>*);
      void updateAnimationsAndScheduleFrameIfNeeded(SMILTime elapsed, bool seekToTime = false);
      SMILTime updateAnimations(SMILTime elapsed, bool seekToTime = false);
      void serviceOnNextFrame();
      void scheduleWakeUp(double delayTime, FrameSchedulingState);
      bool hasPendingSynchronization() const;
  
      void updateDocumentOrderIndexes();
      double lastResumeTime() const { return m_resumeTime ? m_resumeTime : m_beginTime; }
  
      Document& document() const;
      double currentTime() const;
  
      double m_beginTime;
      double m_pauseTime;
      double m_resumeTime;
      double m_accumulatedActiveTime;
      double m_presetStartTime;
  
      FrameSchedulingState m_frameSchedulingState;
      bool m_documentOrderIndexesDirty;
  
      Timer<SMILTimeContainer> m_wakeupTimer;
  
      typedef pair<RawPtrWillBeWeakMember<SVGElement>, QualifiedName> ElementAttributePair;
      typedef WillBeHeapLinkedHashSet<RawPtrWillBeWeakMember<SVGSMILElement> > AnimationsLinkedHashSet;
      typedef WillBeHeapHashMap<ElementAttributePair, OwnPtrWillBeMember<AnimationsLinkedHashSet> > GroupedAnimationsMap;
      GroupedAnimationsMap m_scheduledAnimations;
  
      SVGSVGElement& m_ownerSVGElement;
  
  #ifndef NDEBUG
      bool m_preventScheduledAnimationsChanges;
  #endif
  };
  }
  
  #endif // SMILTimeContainer_h
  