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// Copyright 2017 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef COMPONENTS_MEDIA_ROUTER_BROWSER_PRESENTATION_BROWSER_PRESENTATION_CONNECTION_PROXY_H_
#define COMPONENTS_MEDIA_ROUTER_BROWSER_PRESENTATION_BROWSER_PRESENTATION_CONNECTION_PROXY_H_
#include <vector>
#include "base/memory/raw_ptr.h"
#include "components/media_router/browser/presentation_connection_message_observer.h"
#include "components/media_router/common/media_route.h"
#include "content/public/browser/presentation_service_delegate.h"
#include "mojo/public/cpp/bindings/pending_receiver.h"
#include "mojo/public/cpp/bindings/pending_remote.h"
#include "mojo/public/cpp/bindings/receiver.h"
#include "mojo/public/cpp/bindings/remote.h"
#include "third_party/blink/public/mojom/presentation/presentation.mojom.h"
namespace media_router {
class MediaRouter;
// This class represents a browser side PresentationConnection. It connects with
// PresentationConnection owned by a render frame to enable message exchange.
// Message received on this class is further routed to Media Router. State of
// browser side PresentationConnection is always 'connected'.
//
// |SetTargetConnection| sets |target_connection_| to mojo handle of
// PresentationConnection object owned a render frame, and transits state of
// |target_connection_| to 'connected'.
//
// Send message from render frame to media router:
// blink::PresentationConnection::send();
// -> (mojo call to browser side PresentationConnection)
// -> BrowserPresentationConnectionProxy::OnMessage();
// -> MediaRouter::SendRouteMessage();
//
// Instance of this class is only created for remotely rendered presentations.
// It is owned by PresentationFrame. When PresentationFrame gets destroyed or
// |route_| is closed or terminated, instance of this class will be destroyed.
class BrowserPresentationConnectionProxy
: public blink::mojom::PresentationConnection,
public PresentationConnectionMessageObserver {
public:
// |router|: media router instance not owned by this class;
// |route_id|: underlying media route. |target_connection_remote_| sends
// message to media route with |route_id|;
// |receiver_connection_receiver|: mojo receiver to be bind with this object;
// |controller_connection_remote|: mojo remote of controlling frame's
// connection proxy object.
BrowserPresentationConnectionProxy(
MediaRouter* router,
const MediaRoute::Id& route_id,
mojo::PendingReceiver<blink::mojom::PresentationConnection>
receiver_connection_receiver,
mojo::PendingRemote<blink::mojom::PresentationConnection>
controller_connection_remote);
~BrowserPresentationConnectionProxy() override;
// blink::mojom::PresentationConnection implementation
void OnMessage(
blink::mojom::PresentationConnectionMessagePtr message) override;
// Underlying media route is always connected. Media route class does not
// support state change.
void DidChangeState(
blink::mojom::PresentationConnectionState state) override {}
void DidClose(
blink::mojom::PresentationConnectionCloseReason reason) override;
// PresentationConnectionMessageObserver implementation.
void OnMessagesReceived(
std::vector<mojom::RouteMessagePtr> messages) override;
private:
// |router_| not owned by this class.
const raw_ptr<MediaRouter> router_;
const MediaRoute::Id route_id_;
mojo::Receiver<blink::mojom::PresentationConnection> receiver_{this};
mojo::Remote<blink::mojom::PresentationConnection> target_connection_remote_;
};
} // namespace media_router
#endif // COMPONENTS_MEDIA_ROUTER_BROWSER_PRESENTATION_BROWSER_PRESENTATION_CONNECTION_PROXY_H_
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