closes #374: asynchronous SVG through <img>

dom/animation/AnimationTimeline.h

@@ -94,6 +94,17 @@ public:
    */
   virtual void NotifyAnimationUpdated(Animation& aAnimation);
 
+  /**
+   * Returns true if any CSS animations, CSS transitions or Web animations are
+   * currently associated with this timeline.  As soon as an animation is
+   * applied to an element it is associated with the timeline even if it has a
+   * delayed start, so this includes animations that may not be active for some
+   * time.
+   */
+  bool HasAnimations() const {
+    return !mAnimations.IsEmpty();
+  }
+
   void RemoveAnimation(Animation* aAnimation);
 
 protected:

image/SVGDocumentWrapper.cpp

@@ -5,7 +5,9 @@
 
 #include "SVGDocumentWrapper.h"
 
+#include "mozilla/dom/DocumentTimeline.h"
 #include "mozilla/dom/Element.h"
+#include "nsDOMNavigationTiming.h"
 #include "nsICategoryManager.h"
 #include "nsIChannel.h"
 #include "nsIContentViewer.h"
@@ -115,8 +117,21 @@ bool
 SVGDocumentWrapper::IsAnimated()
 {
   nsIDocument* doc = mViewer->GetDocument();
-  return doc && doc->HasAnimationController() &&
-    doc->GetAnimationController()->HasRegisteredAnimations();
+  if (!doc) {
+    return false;
+  }
+  if (doc->Timeline()->HasAnimations()) {
+    // CSS animations (technically HasAnimations() also checks for CSS
+    // transitions and Web animations but since SVG-as-an-image doesn't run
+    // script they will never run in the document that we wrap).
+    return true;
+  }
+  if (doc->HasAnimationController() &&
+      doc->GetAnimationController()->HasRegisteredAnimations()) {
+    // SMIL animations
+    return true;
+  }
+  return false;
 }
 
 void
@@ -330,6 +345,20 @@ SVGDocumentWrapper::SetupViewer(nsIRequest* aRequest,
 
   NS_ENSURE_TRUE(viewer, NS_ERROR_UNEXPECTED);
 
+  // Create a navigation time object and pass it to the SVG document through
+  // the viewer.
+  // The timeline(DocumentTimeline, used in CSS animation) of this SVG
+  // document needs this navigation timing object for time computation, such
+  // as to calculate current time stamp based on the start time of navigation
+  // time object.
+  //
+  // For a root document, DocShell would do these sort of things
+  // automatically. Since there is no DocShell for this wrapped SVG document,
+  // we must set it up manually.
+  RefPtr<nsDOMNavigationTiming> timing = new nsDOMNavigationTiming();
+  timing->NotifyNavigationStart();
+  viewer->SetNavigationTiming(timing);
+
   nsCOMPtr<nsIParser> parser = do_QueryInterface(listener);
   NS_ENSURE_TRUE(parser, NS_ERROR_UNEXPECTED);
 

image/VectorImage.cpp

@@ -524,6 +524,12 @@ VectorImage::RequestRefresh(const TimeStamp& aTime)
     return;
   }
 
+  PendingAnimationTracker* tracker =
+    mSVGDocumentWrapper->GetDocument()->GetPendingAnimationTracker();
+  if (tracker && ShouldAnimate()) {
+    tracker->TriggerPendingAnimationsOnNextTick(aTime);
+  }
+
   EvaluateAnimation();
 
   mSVGDocumentWrapper->TickRefreshDriver();

layout/base/nsDisplayList.cpp

@@ -1619,7 +1619,7 @@ already_AddRefed<LayerManager> nsDisplayList::PaintRoot(nsDisplayListBuilder* aB
 
   nsIFrame* frame = aBuilder->RootReferenceFrame();
   nsPresContext* presContext = frame->PresContext();
-  nsIPresShell* presShell = presContext->GetPresShell();
+  nsIPresShell* presShell = presContext->PresShell();
   nsRootPresContext* rootPresContext = presContext->GetRootPresContext();
 
   NotifySubDocInvalidationFunc computeInvalidFunc =
@@ -1646,10 +1646,7 @@ already_AddRefed<LayerManager> nsDisplayList::PaintRoot(nsDisplayListBuilder* aB
     BuildContainerLayerFor(aBuilder, layerManager, frame, nullptr, this,
                            containerParameters, nullptr);
 
-  nsIDocument* document = nullptr;
-  if (presShell) {
-    document = presShell->GetDocument();
-  }
+  nsIDocument* document = presShell->GetDocument();
 
   if (!root) {
     layerManager->SetUserData(&gLayerManagerLayerBuilder, oldBuilder);