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

chrome/browser/media/router/receiver_presentation_service_delegate_impl.cc

+// Copyright 2015 The Chromium Authors. All rights reserved.

[mark a. foltz, 2016/10/08 00:33:41]

Update copyright

[zhaobin, 2016/10/12 02:27:33]

Done.

+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "chrome/browser/media/router/receiver_presentation_service_delegate_impl.h"
+
+#include "chrome/browser/profiles/profile.h"
+#include "content/public/browser/render_frame_host.h"
+#include "content/public/browser/render_process_host.h"
+#include "url/gurl.h"
+
+DEFINE_WEB_CONTENTS_USER_DATA_KEY(
+    media_router::ReceiverPresentationServiceDelegateImpl);
+
+using content::PresentationServiceDelegate;
+using content::RenderFrameHost;
+
+namespace media_router {
+
+// static
+void ReceiverPresentationServiceDelegateImpl::CreateForWebContents(
+    content::WebContents* web_contents,
+    const std::string& presentation_id) {
+  DCHECK(web_contents);
+
+  if (FromWebContents(web_contents))
+    return;
+
+  web_contents->SetUserData(UserDataKey(),
+                            new ReceiverPresentationServiceDelegateImpl(
+                                web_contents, presentation_id));
+}
+
+ReceiverPresentationServiceDelegateImpl::
+    ~ReceiverPresentationServiceDelegateImpl() {
+  for (auto& observer_pair : observers_)
+    observer_pair.second->OnDelegateDestroyed();
+}
+
+void ReceiverPresentationServiceDelegateImpl::AddObserver(

[mark a. foltz, 2016/10/08 00:33:42]

IMO it would be worth having a base class for the two delegate implementations
so the observer management API isn't copied into two places.

[zhaobin, 2016/10/12 02:27:33]

Done.

+    int render_process_id,
+    int render_frame_id,
+    content::PresentationServiceDelegate::Observer* observer) {
+  DCHECK(observer);
+
+  RenderFrameHostId rfh_id(render_process_id, render_frame_id);
+  DCHECK(!base::ContainsKey(observers_, rfh_id));
+  observers_[rfh_id] = observer;
+}
+
+void ReceiverPresentationServiceDelegateImpl::RemoveObserver(
+    int render_process_id,
+    int render_frame_id) {
+  observers_.erase(RenderFrameHostId(render_process_id, render_frame_id));
+}
+
+bool ReceiverPresentationServiceDelegateImpl::AddScreenAvailabilityListener(
+    int render_process_id,
+    int render_frame_id,
+    content::PresentationScreenAvailabilityListener* listener) {
+  NOTIMPLEMENTED();
+  return false;
+}
+
+void ReceiverPresentationServiceDelegateImpl::RemoveScreenAvailabilityListener(
+    int render_process_id,
+    int render_frame_id,
+    content::PresentationScreenAvailabilityListener* listener) {
+  NOTIMPLEMENTED();
+}
+
+void ReceiverPresentationServiceDelegateImpl::Reset(int render_process_id,
+                                                    int render_frame_id) {
+  DVLOG(2) << __FUNCTION__ << render_process_id << ", " << render_frame_id;
+  offscreen_presentation_manager_->OnOffscreenPresentationReceiverTerminated(
+      presentation_id_);
+}
+
+void ReceiverPresentationServiceDelegateImpl::SetDefaultPresentationUrls(
+    int render_process_id,
+    int render_frame_id,
+    const std::vector<std::string>& default_presentation_urls,
+    const content::PresentationSessionStartedCallback& callback) {
+  NOTIMPLEMENTED();
+}
+
+void ReceiverPresentationServiceDelegateImpl::StartSession(
+    int render_process_id,
+    int render_frame_id,
+    const std::vector<std::string>& presentation_urls,
+    const content::PresentationSessionStartedCallback& success_cb,
+    const content::PresentationSessionErrorCallback& error_cb) {
+  NOTIMPLEMENTED();
+  error_cb.Run(content::PresentationError(content::PRESENTATION_ERROR_UNKNOWN,
+                                          "Not implemented"));
+}
+
+void ReceiverPresentationServiceDelegateImpl::JoinSession(
+    int render_process_id,
+    int render_frame_id,
+    const std::vector<std::string>& presentation_urls,
+    const std::string& presentation_id,
+    const content::PresentationSessionStartedCallback& success_cb,
+    const content::PresentationSessionErrorCallback& error_cb) {
+  NOTIMPLEMENTED();
+  error_cb.Run(content::PresentationError(content::PRESENTATION_ERROR_UNKNOWN,
+                                          "Not implemented"));
+}
+
+void ReceiverPresentationServiceDelegateImpl::CloseConnection(
+    int render_process_id,
+    int render_frame_id,
+    const std::string& presentation_id) {
+  NOTIMPLEMENTED();

[mark a. foltz, 2016/10/08 00:33:41]

This should be implemented eventually right?

[zhaobin, 2016/10/12 02:27:33]

Maybe not if close/terminate can be handled at render process. Receiver does not
need to talk to Media Router directly, it may delegate close/terminate to its
corresponding controller?

+}
+
+void ReceiverPresentationServiceDelegateImpl::Terminate(
+    int render_process_id,
+    int render_frame_id,
+    const std::string& presentation_id) {
+  NOTIMPLEMENTED();

[mark a. foltz, 2016/10/08 00:33:41]

Should be implemented in the future?

[zhaobin, 2016/10/12 02:27:33]

Same as above.

+}
+
+void ReceiverPresentationServiceDelegateImpl::ListenForSessionMessages(
+    int render_process_id,
+    int render_frame_id,
+    const content::PresentationSessionInfo& session_info,
+    const content::PresentationSessionMessageCallback& message_cb) {
+  NOTIMPLEMENTED();
+}
+
+void ReceiverPresentationServiceDelegateImpl::SendMessage(
+    int render_process_id,
+    int render_frame_id,
+    const content::PresentationSessionInfo& session_info,
+    std::unique_ptr<content::PresentationSessionMessage> message,
+    const SendMessageCallback& send_message_cb) {
+  NOTIMPLEMENTED();
+}
+
+void ReceiverPresentationServiceDelegateImpl::ListenForConnectionStateChange(
+    int render_process_id,
+    int render_frame_id,
+    const content::PresentationSessionInfo& connection,
+    const content::PresentationConnectionStateChangedCallback&
+        state_changed_cb) {
+  NOTIMPLEMENTED();
+}
+
+ReceiverPresentationServiceDelegateImpl::
+    ReceiverPresentationServiceDelegateImpl(content::WebContents* web_contents,
+                                            const std::string& presentation_id)
+    : web_contents_(web_contents),
+      presentation_id_(presentation_id),
+      offscreen_presentation_manager_(
+          OffscreenPresentationManagerFactory::GetOrCreateForBrowserContext(
+              Profile::FromBrowserContext(web_contents_->GetBrowserContext())
+                  ->GetOriginalProfile())) {
+  DCHECK(web_contents_);
+  DCHECK(!presentation_id.empty());
+  DCHECK(offscreen_presentation_manager_);
+  DCHECK(web_contents_->GetBrowserContext()->IsOffTheRecord());
+}
+
+void ReceiverPresentationServiceDelegateImpl::RegisterReceiverAvailableCallback(
+    const content::ReceiverConnectionAvailableCallback&
+        receiver_available_callback) {
+  std::string presentation_url = web_contents_->GetURL().spec();

[mark a. foltz, 2016/10/08 00:33:41]

Can you just pass the URL directly?

[zhaobin, 2016/10/12 02:27:33]

Done.

+  offscreen_presentation_manager_->OnOffscreenPresentationReceiverCreated(
+      presentation_id_, GURL(presentation_url), receiver_available_callback);
+}
+
+void ReceiverPresentationServiceDelegateImpl::
+    RegisterOffscreenPresentationConnection(
+        int render_process_id,
+        int render_frame_id,
+        const content::PresentationSessionInfo& session,
+        content::PresentationConnectionPtr connection) {
+  NOTREACHED();
+}
+
+}  // namespace media_router