1 files changed, 102 insertions, 0 deletions
diff --git a/dom/events/MessageEvent.h b/dom/events/MessageEvent.h
new file mode 100644
index 0000000000..e6afd33998
--- /dev/null
+++ b/dom/events/MessageEvent.h
@@ -0,0 +1,102 @@
+/* -*- 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_MessageEvent_h_
+#define mozilla_dom_MessageEvent_h_
+
+#include "js/RootingAPI.h"
+#include "js/Value.h"
+#include "mozilla/AlreadyAddRefed.h"
+#include "mozilla/Assertions.h"
+#include "mozilla/BasicEvents.h"
+#include "mozilla/RefPtr.h"
+#include "mozilla/dom/Event.h"
+#include "nsCycleCollectionParticipant.h"
+#include "nsISupports.h"
+#include "nsStringFwd.h"
+#include "nsTArray.h"
+
+namespace mozilla::dom {
+
+class BrowsingContext;
+struct MessageEventInit;
+class MessagePort;
+class OwningWindowProxyOrMessagePortOrServiceWorker;
+class ServiceWorker;
+class WindowProxyOrMessagePortOrServiceWorker;
+
+/**
+ * Implements the MessageEvent event, used for cross-document messaging and
+ * server-sent events.
+ *
+ * See http://www.whatwg.org/specs/web-apps/current-work/#messageevent for
+ * further details.
+ */
+class MessageEvent final : public Event {
+ public:
+  MessageEvent(EventTarget* aOwner, nsPresContext* aPresContext,
+               WidgetEvent* aEvent);
+
+  NS_DECL_ISUPPORTS_INHERITED
+  NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_CLASS_INHERITED(MessageEvent, Event)
+
+  JSObject* WrapObjectInternal(JSContext* aCx,
+                               JS::Handle<JSObject*> aGivenProto) override;
+
+  MessageEvent* AsMessageEvent() override { return this; }
+
+  void GetData(JSContext* aCx, JS::MutableHandle<JS::Value> aData,
+               ErrorResult& aRv);
+  void GetOrigin(nsAString&) const;
+  void GetLastEventId(nsAString&) const;
+  void GetSource(
+      Nullable<OwningWindowProxyOrMessagePortOrServiceWorker>& aValue) const;
+
+  void GetPorts(nsTArray<RefPtr<MessagePort>>& aPorts);
+
+  static already_AddRefed<MessageEvent> Constructor(
+      const GlobalObject& aGlobal, const nsAString& aType,
+      const MessageEventInit& aEventInit);
+
+  static already_AddRefed<MessageEvent> Constructor(
+      EventTarget* aEventTarget, const nsAString& aType,
+      const MessageEventInit& aEventInit);
+
+  void InitMessageEvent(
+      JSContext* aCx, const nsAString& aType, bool aCanBubble, bool aCancelable,
+      JS::Handle<JS::Value> aData, const nsAString& aOrigin,
+      const nsAString& aLastEventId,
+      const Nullable<WindowProxyOrMessagePortOrServiceWorker>& aSource,
+      const Sequence<OwningNonNull<MessagePort>>& aPorts) {
+    InitMessageEvent(aCx, aType, aCanBubble ? CanBubble::eYes : CanBubble::eNo,
+                     aCancelable ? Cancelable::eYes : Cancelable::eNo, aData,
+                     aOrigin, aLastEventId, aSource, aPorts);
+  }
+
+  void InitMessageEvent(
+      JSContext* aCx, const nsAString& aType, mozilla::CanBubble,
+      mozilla::Cancelable, JS::Handle<JS::Value> aData,
+      const nsAString& aOrigin, const nsAString& aLastEventId,
+      const Nullable<WindowProxyOrMessagePortOrServiceWorker>& aSource,
+      const Sequence<OwningNonNull<MessagePort>>& aPorts);
+
+ protected:
+  ~MessageEvent();
+
+ private:
+  JS::Heap<JS::Value> mData;
+  nsString mOrigin;
+  nsString mLastEventId;
+  RefPtr<BrowsingContext> mWindowSource;
+  RefPtr<MessagePort> mPortSource;
+  RefPtr<ServiceWorker> mServiceWorkerSource;
+
+  nsTArray<RefPtr<MessagePort>> mPorts;
+};
+
+}  // namespace mozilla::dom
+
+#endif  // mozilla_dom_MessageEvent_h_