1 files changed, 91 insertions, 0 deletions
diff --git a/dom/performance/PerformanceObserver.h b/dom/performance/PerformanceObserver.h
new file mode 100644
index 0000000000..7b50eb8b60
--- /dev/null
+++ b/dom/performance/PerformanceObserver.h
@@ -0,0 +1,91 @@
+/* -*- 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/. */
+
+#ifndef mozilla_dom_PerformanceObserver_h__
+#define mozilla_dom_PerformanceObserver_h__
+
+#include "nsCOMPtr.h"
+#include "nsISupports.h"
+#include "mozilla/dom/PerformanceObserverBinding.h"
+#include "mozilla/RefPtr.h"
+#include "nsString.h"
+#include "nsTArray.h"
+#include "nsWrapperCache.h"
+
+class nsPIDOMWindowInner;
+
+namespace mozilla {
+
+class ErrorResult;
+
+namespace dom {
+
+class GlobalObject;
+class Performance;
+class PerformanceEntry;
+class PerformanceObserverCallback;
+class WorkerPrivate;
+
+class PerformanceObserver final : public nsISupports, public nsWrapperCache {
+ public:
+  NS_DECL_CYCLE_COLLECTING_ISUPPORTS
+  NS_DECL_CYCLE_COLLECTION_WRAPPERCACHE_CLASS(PerformanceObserver)
+
+  static already_AddRefed<PerformanceObserver> Constructor(
+      const GlobalObject& aGlobal, PerformanceObserverCallback& aCb,
+      ErrorResult& aRv);
+
+  PerformanceObserver(nsPIDOMWindowInner* aOwner,
+                      PerformanceObserverCallback& aCb);
+
+  PerformanceObserver(WorkerPrivate* aWorkerPrivate,
+                      PerformanceObserverCallback& aCb);
+
+  virtual JSObject* WrapObject(JSContext* aCx,
+                               JS::Handle<JSObject*> aGivenProto) override;
+
+  nsISupports* GetParentObject() const { return mOwner; }
+
+  void Observe(const PerformanceObserverInit& aOptions, ErrorResult& aRv);
+  static void GetSupportedEntryTypes(const GlobalObject& aGlobal,
+                                     JS::MutableHandle<JSObject*> aObject);
+
+  void Disconnect();
+
+  void TakeRecords(nsTArray<RefPtr<PerformanceEntry>>& aRetval);
+
+  MOZ_CAN_RUN_SCRIPT void Notify();
+  void QueueEntry(PerformanceEntry* aEntry);
+
+  bool ObservesTypeOfEntry(PerformanceEntry* aEntry);
+
+ private:
+  void ReportUnsupportedTypesErrorToConsole(bool aIsMainThread,
+                                            const char* msgId,
+                                            const nsString& aInvalidTypes);
+  ~PerformanceObserver();
+
+  nsCOMPtr<nsISupports> mOwner;
+  RefPtr<PerformanceObserverCallback> mCallback;
+  RefPtr<Performance> mPerformance;
+  nsTArray<nsString> mEntryTypes;
+  nsTArray<PerformanceObserverInit> mOptions;
+  enum {
+    ObserverTypeUndefined,
+    ObserverTypeSingle,
+    ObserverTypeMultiple,
+  } mObserverType;
+  /*
+   * This is also known as registered, in the spec.
+   */
+  bool mConnected;
+  nsTArray<RefPtr<PerformanceEntry>> mQueuedEntries;
+};
+
+}  // namespace dom
+}  // namespace mozilla
+
+#endif