Index: content/renderer/presentation/presentation_connection_proxy.h |
diff --git a/content/renderer/presentation/presentation_connection_proxy.h b/content/renderer/presentation/presentation_connection_proxy.h |
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+// 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 CONTENT_RENDERER_PRESENTATION_PRESENTATION_CONNECTION_PROXY_H_ |
+#define CONTENT_RENDERER_PRESENTATION_PRESENTATION_CONNECTION_PROXY_H_ |
+ |
+#include "base/callback.h" |
+#include "mojo/public/cpp/bindings/binding.h" |
+#include "third_party/WebKit/public/platform/modules/presentation/WebPresentationConnection.h" |
+#include "third_party/WebKit/public/platform/modules/presentation/WebPresentationConnectionProxy.h" |
+#include "third_party/WebKit/public/platform/modules/presentation/presentation.mojom.h" |
+ |
+namespace content { |
+ |
+// This class connects PresentationConnection owned by one frame with |
+// PresentationConnection owned by a different frame. |
+// |
+// |SetSourceConnection| sets |source_connection_| to PresentationConnection |
+// object owned by current frame. |
+// |SetTargetConnection| sets |target_connection_| to mojo handle of |
+// PresentationConnection object owned by a different frame. |
+// |
+// When both |source_connection_| and |target_connection_| are set, |
+// we can send message or notify state changes between controller and receiver. |
+// |
+// To send message from controlling frame to receiver frame: |
+// 1. Controlling frame invokes connection.sendMessage(); |
+// 2. This call is delegated to controller presentation connection proxy's |
+// SendString(). |
+// PresentationConnectionProxy::SendString() { |
+// target_connection_->OnConnectionMessageReceived(); |
+// } |
+// 3. Receiver PresentationConnectionProxy::OnConnectionMessageReceived() is |
+// invoked. |
+// 4. connection.onmessage event on receiver frame is fired. |
+// |
+// Sending message from receiver frame to controlling frame and notifying state |
+// changes works the same. |
+// |
+// Instance of this class is only created for offscreen presentations. |
+class PresentationConnectionProxy |
+ : public blink::WebPresentationConnectionProxy, |
+ public NON_EXPORTED_BASE(blink::mojom::PresentationConnection) { |
+ public: |
+ PresentationConnectionProxy(); |
+ ~PresentationConnectionProxy() override; |
+ |
+ blink::mojom::PresentationConnectionPtr Bind(); |
+ |
+ // WebPresentationConnectionProxy Implementation |
+ void SetSourceConnection( |
+ blink::WebPresentationConnection* connection) override; |
+ void SendString(const blink::WebString& message) override; |
+ void SendArrayBuffer(const uint8_t* data, size_t length) override; |
+ |
+ // blink::mojom::PresentationConnection implementation |
+ void SetTargetConnection( |
+ blink::mojom::PresentationConnectionPtr connection) override; |
+ void OnMessage(blink::mojom::SessionMessagePtr message) override; |
+ |
+ private: |
+ mojo::Binding<blink::mojom::PresentationConnection> binding_; |
+ blink::mojom::PresentationConnectionPtr target_connection_; |
+ blink::WebPresentationConnection* source_connection_; |
+}; |
+ |
+} // namespace content |
+ |
+#endif // CONTENT_RENDERER_PRESENTATION_PRESENTATION_CONNECTION_PROXY_H_ |