[SVG] Handle beginEvent for svg animations

Source/core/svg/animation/SVGSMILElement.cpp

 /*
  * 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
@@ skipping 33 matching lines @@
 using namespace std;
 
 namespace WebCore {
 
 static SMILEventSender& smilEndEventSender()
 {
     DEFINE_STATIC_LOCAL(SMILEventSender, sender, ("endEvent"));
     return sender;
 }
 
+static SMILEventSender& smilBeginEventSender()
+{
+    DEFINE_STATIC_LOCAL(SMILEventSender, sender, ("beginEvent"));
+    return sender;
+}
+
 // This is used for duration type time values that can't be negative.
 static const double invalidCachedTime = -1.;
 
 class ConditionEventListener : public EventListener {
 public:
     static PassRefPtr<ConditionEventListener> create(SVGSMILElement* animation, SVGSMILElement::Condition* condition)
     {
         return adoptRef(new ConditionEventListener(animation, condition));
     }
 
@@ skipping 70 matching lines @@
     , m_cachedMin(invalidCachedTime)
     , m_cachedMax(invalidCachedTime)
 {
     resolveFirstInterval();
 }
 
 SVGSMILElement::~SVGSMILElement()
 {
     clearResourceReferences();
     smilEndEventSender().cancelEvent(this);
+    smilBeginEventSender().cancelEvent(this);
     disconnectConditions();
     if (m_timeContainer && m_targetElement && hasValidAttributeName())
         m_timeContainer->unschedule(this, m_targetElement, m_attributeName);
 }
 
 void SVGSMILElement::clearResourceReferences()
 {
     ASSERT(document());
     document()->accessSVGExtensions()->removeAllTargetReferencesForElement(this);
 }
@@ skipping 945 matching lines @@
 
     ActiveState oldActiveState = m_activeState;
     m_activeState = determineActiveState(elapsed);
     bool animationIsContributing = isContributing(elapsed);
 
     // Only reset the animated type to the base value once for the lowest priority animation that animates and contributes to a particular element/attribute pair.
     if (this == resultElement && animationIsContributing)
         resetAnimatedType();
 
     if (animationIsContributing) {
-        if (oldActiveState == Inactive)
+        if (oldActiveState == Inactive) {
+            smilBeginEventSender().dispatchEventSoon(this);
             startedActiveInterval();
+        }
 
         updateAnimation(percent, repeat, resultElement);
         m_lastPercent = percent;
         m_lastRepeat = repeat;
     }
 
     if (oldActiveState == Active && m_activeState != Active) {
         smilEndEventSender().dispatchEventSoon(this);
         endedActiveInterval();
         if (m_activeState != Frozen && this == resultElement)
             clearAnimatedType(m_targetElement);
     }
 
     // Triggering all the pending events if the animation timeline is changed.
     if (seekToTime) {
+        if (m_activeState == Inactive)
+            smilBeginEventSender().dispatchEventSoon(this);
         if (m_activeState == Inactive || m_activeState == Frozen)
             smilEndEventSender().dispatchEventSoon(this);
     }
 
     m_nextProgressTime = calculateNextProgressTime(elapsed);
     return animationIsContributing;
 }
 
 void SVGSMILElement::notifyDependentsIntervalChanged(NewOrExistingInterval newOrExisting)
 {
@@ skipping 62 matching lines @@
 }
 
 void SVGSMILElement::endedActiveInterval()
 {
     clearTimesWithDynamicOrigins(m_beginTimes);
     clearTimesWithDynamicOrigins(m_endTimes);
 }
 
 void SVGSMILElement::dispatchPendingEvent(SMILEventSender* eventSender)
 {
-    ASSERT(eventSender == &smilEndEventSender());
+    ASSERT(eventSender == &smilEndEventSender() || eventSender == &smilBeginEventSender());
     const AtomicString& eventType = eventSender->eventType();
     dispatchEvent(Event::create(eventType));
 }
 
 }