[Presentation API] Plumbing of |onstatechange| from the Mojo service to the public/platform

content/renderer/presentation/presentation_dispatcher.cc

 // 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.
 
 #include "content/renderer/presentation/presentation_dispatcher.h"
 
 #include "base/logging.h"
 #include "content/common/presentation/presentation_service.mojom.h"
 #include "content/public/common/service_registry.h"
 #include "content/public/renderer/render_frame.h"
@@ skipping 15 matching lines @@
     case presentation::PRESENTATION_ERROR_TYPE_SESSION_REQUEST_CANCELLED:
       return blink::WebPresentationError::ErrorTypeSessionRequestCancelled;
     case presentation::PRESENTATION_ERROR_TYPE_NO_PRESENTATION_FOUND:
       return blink::WebPresentationError::ErrorTypeNoPresentationFound;
     case presentation::PRESENTATION_ERROR_TYPE_UNKNOWN:
     default:
       return blink::WebPresentationError::ErrorTypeUnknown;
   }
 }
 
+blink::WebPresentationSessionState GetWebPresentationSessionStateFromMojo(
+        presentation::PresentationSessionState mojoSessionState) {
+  switch (mojoSessionState) {
+    case presentation::PRESENTATION_SESSION_STATE_CONNECTED:
+      return blink::WebPresentationSessionState::Connected;
+    case presentation::PRESENTATION_SESSION_STATE_DISCONNECTED:
+      return blink::WebPresentationSessionState::Disconnected;
+  }
+
+  NOTREACHED();
+  return blink::WebPresentationSessionState::Disconnected;
+}
+
 GURL GetPresentationURLFromFrame(content::RenderFrame* frame) {
   DCHECK(frame);
 
   GURL url(frame->GetWebFrame()->document().defaultPresentationURL());
   return url.is_valid() ? url : GURL();
 }
 
 }  // namespace
 
 namespace content {
@@ skipping 108 matching lines @@
     presentation::PresentationSessionInfoPtr session_info) {
   if (!controller_)
     return;
 
   // Reset the callback to get the next event.
   presentation_service_->ListenForDefaultSessionStart(base::Bind(
       &PresentationDispatcher::OnDefaultSessionStarted,
       base::Unretained(this)));
 
   DCHECK(!session_info.is_null());
-  PresentationSessionDispatcher* session_dispatcher =
-      new PresentationSessionDispatcher(session_info.Pass());
-  presentation_session_dispatchers_.push_back(session_dispatcher);
   controller_->didStartDefaultSession(
-      new PresentationSessionClient(session_dispatcher));
+      new PresentationSessionClient(session_info.Pass()));
 }
 
 void PresentationDispatcher::OnSessionCreated(
     blink::WebPresentationSessionClientCallbacks* callback,
     presentation::PresentationSessionInfoPtr session_info,
     presentation::PresentationErrorPtr error) {
   DCHECK(callback);
   if (!error.is_null()) {
     DCHECK(session_info.is_null());
     callback->onError(new blink::WebPresentationError(
         GetWebPresentationErrorTypeFromMojo(error->error_type),
         blink::WebString::fromUTF8(error->message)));
     return;
   }
 
   DCHECK(!session_info.is_null());
-  PresentationSessionDispatcher* session_dispatcher =
-      new PresentationSessionDispatcher(session_info.Pass());
-  presentation_session_dispatchers_.push_back(session_dispatcher);
-  callback->onSuccess(new PresentationSessionClient(session_dispatcher));
+  callback->onSuccess(new PresentationSessionClient(session_info.Pass()));
+}
+
+void PresentationDispatcher::OnSessionStateChange(
+    presentation::PresentationSessionInfoPtr session_info,
+    presentation::PresentationSessionState session_state) {
+  if (!controller_)
+    return;
+
+  presentation_service_->ListenForSessionStateChange(base::Bind(
+      &PresentationDispatcher::OnSessionStateChange,
+      base::Unretained(this)));
+
+  DCHECK(!session_info.is_null());
+  controller_->didChangeSessionState(
+      new PresentationSessionClient(session_info.Pass()),
+      GetWebPresentationSessionStateFromMojo(session_state));
 }
 
 void PresentationDispatcher::ConnectToPresentationServiceIfNeeded() {
   if (presentation_service_.get())
     return;
 
   render_frame()->GetServiceRegistry()->ConnectToRemoteService(
       &presentation_service_);
   presentation_service_->ListenForDefaultSessionStart(base::Bind(
       &PresentationDispatcher::OnDefaultSessionStarted,
       base::Unretained(this)));
+  presentation_service_->ListenForSessionStateChange(base::Bind(
+      &PresentationDispatcher::OnSessionStateChange,
+      base::Unretained(this)));
 }
 
 }  // namespace content