1 files changed, 80 insertions, 0 deletions
diff --git a/gfx/layers/apz/src/IAPZHitTester.cpp b/gfx/layers/apz/src/IAPZHitTester.cpp
new file mode 100644
index 0000000000..75a6076cd4
--- /dev/null
+++ b/gfx/layers/apz/src/IAPZHitTester.cpp
@@ -0,0 +1,80 @@
+/* -*- 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 "IAPZHitTester.h"
+#include "APZCTreeManager.h"
+#include "AsyncPanZoomController.h"
+
+namespace mozilla {
+namespace layers {
+
+IAPZHitTester::HitTestResult IAPZHitTester::CloneHitTestResult(
+    RecursiveMutexAutoLock& aProofOfTreeLock,
+    const IAPZHitTester::HitTestResult& aHitTestResult) const {
+  HitTestResult result;
+
+  result.mTargetApzc = aHitTestResult.mTargetApzc;
+  result.mHitResult = aHitTestResult.mHitResult;
+  result.mLayersId = aHitTestResult.mLayersId;
+  result.mFixedPosSides = aHitTestResult.mFixedPosSides;
+  result.mHitOverscrollGutter = aHitTestResult.mHitOverscrollGutter;
+
+  RefPtr<HitTestingTreeNode> scrollbarNode =
+      aHitTestResult.mScrollbarNode.Get(aProofOfTreeLock);
+  RefPtr<HitTestingTreeNode> node = aHitTestResult.mNode.Get(aProofOfTreeLock);
+
+  if (aHitTestResult.mScrollbarNode) {
+    InitializeHitTestingTreeNodeAutoLock(result.mScrollbarNode,
+                                         aProofOfTreeLock, scrollbarNode);
+  }
+  if (aHitTestResult.mNode) {
+    InitializeHitTestingTreeNodeAutoLock(result.mNode, aProofOfTreeLock, node);
+  }
+
+  return result;
+}
+
+RecursiveMutex& IAPZHitTester::GetTreeLock() { return mTreeManager->mTreeLock; }
+
+LayersId IAPZHitTester::GetRootLayersId() const {
+  return mTreeManager->mRootLayersId;
+}
+
+HitTestingTreeNode* IAPZHitTester::GetRootNode() const {
+  mTreeManager->mTreeLock.AssertCurrentThreadIn();
+  return mTreeManager->mRootNode;
+}
+
+HitTestingTreeNode* IAPZHitTester::FindRootNodeForLayersId(
+    LayersId aLayersId) const {
+  return mTreeManager->FindRootNodeForLayersId(aLayersId);
+}
+
+AsyncPanZoomController* IAPZHitTester::FindRootApzcForLayersId(
+    LayersId aLayersId) const {
+  HitTestingTreeNode* resultNode = FindRootNodeForLayersId(aLayersId);
+  return resultNode ? resultNode->GetApzc() : nullptr;
+}
+
+already_AddRefed<HitTestingTreeNode> IAPZHitTester::GetTargetNode(
+    const ScrollableLayerGuid& aGuid,
+    ScrollableLayerGuid::Comparator aComparator) {
+  // Acquire the tree lock so that derived classes can call this from
+  // methods other than GetAPZCAtPoint().
+  RecursiveMutexAutoLock lock(mTreeManager->mTreeLock);
+  return mTreeManager->GetTargetNode(aGuid, aComparator);
+}
+
+void IAPZHitTester::InitializeHitTestingTreeNodeAutoLock(
+    HitTestingTreeNodeAutoLock& aAutoLock,
+    const RecursiveMutexAutoLock& aProofOfTreeLock,
+    RefPtr<HitTestingTreeNode>& aNode) const {
+  aAutoLock.Initialize(aProofOfTreeLock, aNode.forget(),
+                       mTreeManager->mTreeLock);
+}
+
+}  // namespace layers
+}  // namespace mozilla