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// 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>
#include <map>
#include <queue>
#include "base/compiler_specific.h"
#include "base/id_map.h"
#include "base/macros.h"
#include "base/memory/scoped_ptr.h"
#include "content/common/content_export.h"
#include "content/common/presentation/presentation_service.mojom.h"
#include "content/public/renderer/render_frame_observer.h"
#include "mojo/public/cpp/bindings/binding.h"
#include "third_party/WebKit/public/platform/modules/presentation/WebPresentationClient.h"
namespace blink {
class WebPresentationAvailabilityObserver;
class WebString;
} // namespace blink
namespace content {
// 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(mojom::PresentationServiceClient) {
public:
explicit PresentationDispatcher(RenderFrame* render_frame);
~PresentationDispatcher() override;
private:
struct SendMessageRequest {
SendMessageRequest(mojom::PresentationSessionInfoPtr session_info,
mojom::SessionMessagePtr message);
~SendMessageRequest();
mojom::PresentationSessionInfoPtr session_info;
mojom::SessionMessagePtr message;
};
static SendMessageRequest* CreateSendTextMessageRequest(
const blink::WebString& presentationUrl,
const blink::WebString& presentationId,
const blink::WebString& message);
static SendMessageRequest* CreateSendBinaryMessageRequest(
const blink::WebString& presentationUrl,
const blink::WebString& presentationId,
mojom::PresentationMessageType type,
const uint8_t* data,
size_t length);
// WebPresentationClient implementation.
void setController(blink::WebPresentationController* controller) override;
void startSession(
const blink::WebString& presentationUrl,
blink::WebPresentationConnectionClientCallbacks* callback) override;
void joinSession(
const blink::WebString& presentationUrl,
const blink::WebString& presentationId,
blink::WebPresentationConnectionClientCallbacks* callback) override;
void sendString(const blink::WebString& presentationUrl,
const blink::WebString& presentationId,
const blink::WebString& message) override;
void sendArrayBuffer(const blink::WebString& presentationUrl,
const blink::WebString& presentationId,
const uint8_t* data,
size_t length) override;
void sendBlobData(const blink::WebString& presentationUrl,
const blink::WebString& presentationId,
const uint8_t* data,
size_t length) override;
void closeSession(const blink::WebString& presentationUrl,
const blink::WebString& presentationId) override;
void terminateSession(const blink::WebString& presentationUrl,
const blink::WebString& presentationId) override;
void getAvailability(
const blink::WebString& availabilityUrl,
blink::WebPresentationAvailabilityCallbacks* callbacks) override;
void startListening(blink::WebPresentationAvailabilityObserver*) override;
void stopListening(blink::WebPresentationAvailabilityObserver*) override;
void setDefaultPresentationUrl(const blink::WebString& url) override;
// RenderFrameObserver implementation.
void DidCommitProvisionalLoad(
bool is_new_navigation,
bool is_same_page_navigation) override;
// mojom::PresentationServiceClient
void OnScreenAvailabilityNotSupported(const mojo::String& url) override;
void OnScreenAvailabilityUpdated(const mojo::String& url,
bool available) override;
void OnConnectionStateChanged(
mojom::PresentationSessionInfoPtr connection,
mojom::PresentationConnectionState state) override;
void OnConnectionClosed(mojom::PresentationSessionInfoPtr connection,
mojom::PresentationConnectionCloseReason reason,
const mojo::String& message) override;
void OnSessionMessagesReceived(
mojom::PresentationSessionInfoPtr session_info,
mojo::Array<mojom::SessionMessagePtr> messages) override;
void OnDefaultSessionStarted(
mojom::PresentationSessionInfoPtr session_info) override;
void OnSessionCreated(
blink::WebPresentationConnectionClientCallbacks* callback,
mojom::PresentationSessionInfoPtr session_info,
mojom::PresentationErrorPtr error);
// 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();
// Used as a weak reference. Can be null since lifetime is bound to the frame.
blink::WebPresentationController* controller_;
mojom::PresentationServicePtr presentation_service_;
mojo::Binding<mojom::PresentationServiceClient> binding_;
// Message requests are queued here and only one message at a time is sent
// over mojo channel.
using MessageRequestQueue = std::queue<scoped_ptr<SendMessageRequest>>;
MessageRequestQueue message_request_queue_;
enum class ListeningState {
INACTIVE,
WAITING,
ACTIVE,
};
using AvailabilityCallbacksMap =
IDMap<blink::WebPresentationAvailabilityCallbacks, IDMapOwnPointer>;
using AvailabilityObserversSet =
std::set<blink::WebPresentationAvailabilityObserver*>;
// Tracks status of presentation displays availability for |availability_url|.
struct AvailabilityStatus {
explicit AvailabilityStatus(const std::string& availability_url);
~AvailabilityStatus();
const std::string url;
bool last_known_availability;
ListeningState listening_state;
AvailabilityCallbacksMap availability_callbacks;
AvailabilityObserversSet availability_observers;
};
std::map<std::string, scoped_ptr<AvailabilityStatus>> availability_status_;
// 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_
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