1 files changed, 62 insertions, 0 deletions
diff --git a/dom/animation/AnimationEventDispatcher.cpp b/dom/animation/AnimationEventDispatcher.cpp
new file mode 100644
index 0000000000..b4c55cddce
--- /dev/null
+++ b/dom/animation/AnimationEventDispatcher.cpp
@@ -0,0 +1,62 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* 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/. */
+
+#include "mozilla/AnimationEventDispatcher.h"
+
+#include "mozilla/EventDispatcher.h"
+#include "nsPresContext.h"
+#include "nsRefreshDriver.h"
+
+namespace mozilla {
+
+NS_IMPL_CYCLE_COLLECTION_CLASS(AnimationEventDispatcher)
+NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(AnimationEventDispatcher)
+  tmp->ClearEventQueue();
+NS_IMPL_CYCLE_COLLECTION_UNLINK_END
+NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN(AnimationEventDispatcher)
+  for (auto& info : tmp->mPendingEvents) {
+    ImplCycleCollectionTraverse(
+        cb, info.mTarget,
+        "mozilla::AnimationEventDispatcher.mPendingEvents.mTarget");
+    ImplCycleCollectionTraverse(
+        cb, info.mAnimation,
+        "mozilla::AnimationEventDispatcher.mPendingEvents.mAnimation");
+  }
+NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
+
+void AnimationEventDispatcher::Disconnect() {
+  if (mIsObserving) {
+    MOZ_ASSERT(mPresContext && mPresContext->RefreshDriver(),
+               "The pres context and the refresh driver should be still "
+               "alive if we haven't disassociated from the refresh driver");
+    mPresContext->RefreshDriver()->CancelPendingAnimationEvents(this);
+    mIsObserving = false;
+  }
+  mPresContext = nullptr;
+}
+
+void AnimationEventDispatcher::QueueEvent(AnimationEventInfo&& aEvent) {
+  mPendingEvents.AppendElement(std::move(aEvent));
+  mIsSorted = false;
+  ScheduleDispatch();
+}
+
+void AnimationEventDispatcher::QueueEvents(
+    nsTArray<AnimationEventInfo>&& aEvents) {
+  mPendingEvents.AppendElements(std::move(aEvents));
+  mIsSorted = false;
+  ScheduleDispatch();
+}
+
+void AnimationEventDispatcher::ScheduleDispatch() {
+  MOZ_ASSERT(mPresContext, "The pres context should be valid");
+  if (!mIsObserving) {
+    mPresContext->RefreshDriver()->ScheduleAnimationEventDispatch(this);
+    mIsObserving = true;
+  }
+}
+
+}  // namespace mozilla