Bug 882718 - Implement GetCueListByTimeInterval() at TextTrackCueList object. r=rillian

MozReview-Commit-ID: 1T3EEfG83ec

--HG--
extra : transplant_source : %13%EA%F55%E5k%0C%5D%CC%60_k%B5%03%FDnq%97L%B2

dom/media/TextTrackCueList.cpp

@@ -125,5 +125,19 @@ TextTrackCueList::SetCuesInactive()
   }
 }
 
+already_AddRefed<TextTrackCueList>
+TextTrackCueList::GetCueListByTimeInterval(media::Interval<double>& aInterval)
+{
+  RefPtr<TextTrackCueList> output = new TextTrackCueList(mParent);
+  for (uint32_t i = 0; i < mList.Length(); ++i) {
+    TextTrackCue* cue = mList[i];
+    if (cue->StartTime() <= aInterval.mEnd &&
+        aInterval.mStart <= cue->EndTime()) {
+      output->AddCue(*cue);
+    }
+  }
+  return output.forget();
+}
+
 } // namespace dom
 } // namespace mozilla

dom/media/TextTrackCueList.h

@@ -12,6 +12,7 @@
 #include "nsCycleCollectionParticipant.h"
 #include "nsWrapperCache.h"
 #include "mozilla/ErrorResult.h"
+#include "Intervals.h"
 
 namespace mozilla {
 namespace dom {
@@ -56,6 +57,9 @@ public:
 
   void SetCuesInactive();
 
+  already_AddRefed<TextTrackCueList>
+  GetCueListByTimeInterval(media::Interval<double>& aInterval);
+
 private:
   ~TextTrackCueList();