1 files changed, 66 insertions, 0 deletions
diff --git a/devtools/shared/heapsnapshot/DominatorTree.h b/devtools/shared/heapsnapshot/DominatorTree.h
new file mode 100644
index 0000000000..e8e06ee076
--- /dev/null
+++ b/devtools/shared/heapsnapshot/DominatorTree.h
@@ -0,0 +1,66 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2; -*- */
+/* 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/. */
+
+#ifndef mozilla_devtools_DominatorTree__
+#define mozilla_devtools_DominatorTree__
+
+#include "mozilla/devtools/HeapSnapshot.h"
+#include "mozilla/dom/BindingDeclarations.h"
+#include "mozilla/RefCounted.h"
+#include "js/UbiNodeDominatorTree.h"
+#include "nsWrapperCache.h"
+
+namespace mozilla {
+class ErrorResult;
+
+namespace devtools {
+
+class DominatorTree final : public nsISupports, public nsWrapperCache {
+ protected:
+  nsCOMPtr<nsISupports> mParent;
+
+  virtual ~DominatorTree() {}
+
+ private:
+  JS::ubi::DominatorTree mDominatorTree;
+  RefPtr<HeapSnapshot> mHeapSnapshot;
+
+ public:
+  explicit DominatorTree(JS::ubi::DominatorTree&& aDominatorTree,
+                         HeapSnapshot* aHeapSnapshot, nsISupports* aParent)
+      : mParent(aParent),
+        mDominatorTree(std::move(aDominatorTree)),
+        mHeapSnapshot(aHeapSnapshot) {
+    MOZ_ASSERT(aParent);
+    MOZ_ASSERT(aHeapSnapshot);
+  };
+
+  NS_DECL_CYCLE_COLLECTING_ISUPPORTS;
+  NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_CLASS(DominatorTree);
+
+  nsISupports* GetParentObject() const { return mParent; }
+
+  virtual JSObject* WrapObject(JSContext* aCx,
+                               JS::Handle<JSObject*> aGivenProto) override;
+
+  // readonly attribute NodeId root
+  uint64_t Root() const { return mDominatorTree.root().identifier(); }
+
+  // [Throws] NodeSize getRetainedSize(NodeId node)
+  dom::Nullable<uint64_t> GetRetainedSize(uint64_t aNodeId, ErrorResult& aRv);
+
+  // [Throws] sequence<NodeId>? getImmediatelyDominated(NodeId node);
+  void GetImmediatelyDominated(uint64_t aNodeId,
+                               dom::Nullable<nsTArray<uint64_t>>& aOutDominated,
+                               ErrorResult& aRv);
+
+  // NodeId? getImmediateDominator(NodeId node);
+  dom::Nullable<uint64_t> GetImmediateDominator(uint64_t aNodeId) const;
+};
+
+}  // namespace devtools
+}  // namespace mozilla
+
+#endif  // mozilla_devtools_DominatorTree__