[Presentation API] (alternative) 1-UA: send message between controller and receiver page

content/renderer/presentation/presentation_dispatcher.h

 // Copyright 2015 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_DISPATCHER_H_
 #define CONTENT_RENDERER_PRESENTATION_PRESENTATION_DISPATCHER_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 15 matching lines @@
 class WebPresentationAvailabilityObserver;
 class WebPresentationReceiver;
 class WebString;
 class WebURL;
 template <typename T>
 class WebVector;
 }  // namespace blink
 
 namespace content {
 
+class PresentationConnectionProxy;

[imcheng, 2016/11/01 17:20:30]

nit: add blank line below

[zhaobin, 2016/11/02 03:55:48]

Done.

 // PresentationDispatcher is a delegate for Presentation API messages used by
 // Blink. It forwards the calls to the Mojo PresentationService.
 class CONTENT_EXPORT PresentationDispatcher
     : public RenderFrameObserver,
       public NON_EXPORTED_BASE(blink::WebPresentationClient),
       public NON_EXPORTED_BASE(blink::mojom::PresentationServiceClient) {
  public:
   explicit PresentationDispatcher(RenderFrame* render_frame);
   ~PresentationDispatcher() override;
 
+  static blink::mojom::SessionMessagePtr ToMojoTextMessage(

[imcheng, 2016/11/01 17:20:30]

do these need to be public static methods or can they just be functions in
anonymous namespace?

[zhaobin, 2016/11/02 03:55:48]

Done.

+      const blink::WebString& message);
+  static blink::mojom::SessionMessagePtr ToMojoBinaryMessage(
+      blink::mojom::PresentationMessageType type,
+      const uint8_t* data,
+      size_t length);
+
  private:
   struct SendMessageRequest {
     SendMessageRequest(blink::mojom::PresentationSessionInfoPtr session_info,
                        blink::mojom::SessionMessagePtr message);
     ~SendMessageRequest();
 
     blink::mojom::PresentationSessionInfoPtr session_info;
     blink::mojom::SessionMessagePtr message;
   };
 
@@ skipping 62 matching lines @@
       blink::mojom::PresentationSessionInfoPtr session_info,
       std::vector<blink::mojom::SessionMessagePtr> messages) override;
   void OnDefaultSessionStarted(
       blink::mojom::PresentationSessionInfoPtr session_info) override;
 
   void OnSessionCreated(
       blink::WebPresentationConnectionClientCallbacks* callback,
       blink::mojom::PresentationSessionInfoPtr session_info,
       blink::mojom::PresentationErrorPtr error);
   void OnReceiverConnectionAvailable(
-      blink::mojom::PresentationSessionInfoPtr) override;
+      blink::mojom::PresentationSessionInfoPtr,
+      blink::mojom::PresentationConnectionPtr) override;
 
   // Call to PresentationService to send the message in |request|.
   // |session_info| and |message| of |reuqest| will be consumed.
   // |HandleSendMessageRequests| will be invoked after the send is attempted.
   void DoSendMessage(SendMessageRequest* request);
   void HandleSendMessageRequests(bool success);
 
   void ConnectToPresentationServiceIfNeeded();
 
   void UpdateListeningState();
+  std::unique_ptr<PresentationConnectionProxy>
+  CreateAndSetControllerConnectionProxy(
+      blink::mojom::PresentationSessionInfoPtr session_info);
 
   // Used as a weak reference. Can be null since lifetime is bound to the frame.
   blink::WebPresentationController* controller_;
   blink::WebPresentationReceiver* receiver_;
   blink::mojom::PresentationServicePtr presentation_service_;
   mojo::Binding<blink::mojom::PresentationServiceClient> binding_;
 
   // Message requests are queued here and only one message at a time is sent
   // over mojo channel.
   using MessageRequestQueue = std::queue<std::unique_ptr<SendMessageRequest>>;
@@ skipping 29 matching lines @@
   // Updates the listening state of availability for |status| and notifies the
   // client.
   void UpdateListeningState(AvailabilityStatus* status);
 
   DISALLOW_COPY_AND_ASSIGN(PresentationDispatcher);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_PRESENTATION_PRESENTATION_DISPATCHER_H_