Implement BroadcastChannel

third_party/WebKit/Source/modules/broadcastchannel/BroadcastChannel.h

+// Copyright 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef BroadcastChannel_h
+#define BroadcastChannel_h
+
+#include "bindings/core/v8/ActiveScriptWrappable.h"
+#include "components/webmessaging/broadcast_channel.mojom-blink.h"
+#include "core/dom/ActiveDOMObject.h"
+#include "core/events/EventTarget.h"
+#include "mojo/public/cpp/bindings/associated_binding.h"
+
+namespace blink {
+
+class BroadcastChannel final
+    : public EventTargetWithInlineData
+    , public ActiveScriptWrappable
+    , public ActiveDOMObject
+    , public webmessaging::mojom::blink::BroadcastChannelClient {
+    DEFINE_WRAPPERTYPEINFO();
+    USING_GARBAGE_COLLECTED_MIXIN(BroadcastChannel);
+
+public:
+    static BroadcastChannel* create(ExecutionContext*, const String& name);
+    ~BroadcastChannel() override;
+
+    // IDL
+    String name() const { return m_name; }
+    void postMessage(const ScriptValue&, ExceptionState&);
+    void close();
+    DEFINE_ATTRIBUTE_EVENT_LISTENER(message);
+
+    const AtomicString& interfaceName() const override;
+    ExecutionContext* getExecutionContext() const override { return ActiveDOMObject::getExecutionContext(); }
+    bool hasPendingActivity() const override;
+
+    DECLARE_VIRTUAL_TRACE();
+
+private:
+    BroadcastChannel(ExecutionContext*, const String& name);
+
+    // mojom
+    void OnMessage(const String& message) override;
+    void OnError();
+
+    String m_name;
+
+    mojo::AssociatedBinding<webmessaging::mojom::blink::BroadcastChannelClient> m_binding;
+    webmessaging::mojom::blink::BroadcastChannelClientAssociatedPtr m_remoteClient;
+};
+
+} // namespace blink
+
+#endif // BroadcastChannel_h