(Not for review) Dummy C++ side Custom Controls implementation

chrome/browser/ui/webui/media_router/media_router_ui.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 CHROME_BROWSER_UI_WEBUI_MEDIA_ROUTER_MEDIA_ROUTER_UI_H_
 #define CHROME_BROWSER_UI_WEBUI_MEDIA_ROUTER_MEDIA_ROUTER_UI_H_
 
 #include <memory>
 #include <set>
 #include <string>
 #include <vector>
 
 #include "base/gtest_prod_util.h"
 #include "base/macros.h"
 #include "base/memory/weak_ptr.h"
+#include "base/optional.h"
 #include "base/timer/timer.h"
 #include "chrome/browser/media/router/issue.h"
+#include "chrome/browser/media/router/media_route_status_observer.h"
 #include "chrome/browser/media/router/media_source.h"
 #include "chrome/browser/media/router/presentation_service_delegate_impl.h"
 #include "chrome/browser/ui/webui/constrained_web_dialog_ui.h"
 #include "chrome/browser/ui/webui/media_router/media_cast_mode.h"
 #include "chrome/browser/ui/webui/media_router/media_sink_with_cast_modes.h"
 #include "chrome/browser/ui/webui/media_router/query_result_manager.h"
 #include "content/public/browser/web_ui_data_source.h"
 #include "third_party/icu/source/common/unicode/uversion.h"
 #include "url/gurl.h"
 
@@ skipping 129 matching lines @@
   // Marked virtual for tests.
   virtual const std::string& GetRouteProviderExtensionId() const;
 
   // Called to track UI metrics.
   void SetUIInitializationTimer(const base::Time& start_time);
   void OnUIInitiallyLoaded();
   void OnUIInitialDataReceived();
 
   void UpdateMaxDialogHeight(int height);
 
+  // Sends media commands to |route_controller_| if it is set.
+  void PlayRoute();
+  void PauseRoute();
+  void SeekRoute(uint32_t time);
+  void SetRouteMute(bool mute);
+  void SetRouteVolume(float volume);
+
+  // Gets a reference to the MediaRouteController for |route_id| and
+  // instantiates an observer for media status updates for the route.
+  void OnUIDetailsViewOpened(MediaRoute::Id route_id);
+
+  // Resets |route_controller_| and |route_status_observer_|.
+  void OnUIDetailsViewClosed();
+
   void InitForTest(MediaRouter* router,
                    content::WebContents* initiator,
                    MediaRouterWebUIMessageHandler* handler,
                    std::unique_ptr<CreatePresentationConnectionRequest>
                        create_session_request);
 
  private:
   FRIEND_TEST_ALL_PREFIXES(MediaRouterUITest, SortedSinks);
   FRIEND_TEST_ALL_PREFIXES(MediaRouterUITest, SortSinksByIconType);
   FRIEND_TEST_ALL_PREFIXES(MediaRouterUITest, FilterNonDisplayRoutes);
@@ skipping 28 matching lines @@
         const std::vector<MediaRoute>& routes,
         const std::vector<MediaRoute::Id>& joinable_route_ids) override;
 
    private:
     // Callback to the owning MediaRouterUI instance.
     RoutesUpdatedCallback callback_;
 
     DISALLOW_COPY_AND_ASSIGN(UIMediaRoutesObserver);
   };
 
+  class UIMediaRouteStatusObserver : public MediaRouteStatusObserver {
+   public:
+    UIMediaRouteStatusObserver(MediaRouterWebUIMessageHandler* handler);
+    ~UIMediaRouteStatusObserver() override;
+
+    // MediaRouteStatusObserver
+    void OnMediaRouteStatusUpdated(const MediaStatus& status) override;
+
+   private:
+    MediaRouterWebUIMessageHandler* handler_;
+
+    DISALLOW_COPY_AND_ASSIGN(UIMediaRouteStatusObserver);
+  };
+
   static std::string GetExtensionName(const GURL& url,
                                       extensions::ExtensionRegistry* registry);
 
   // QueryResultManager::Observer
   void OnResultsUpdated(
       const std::vector<MediaSinkWithCastModes>& sinks) override;
 
   // Called by |issues_observer_| when the top issue has changed.
   // If the UI is already initialized, notifies |handler_| to update the UI.
   // Ignored if the UI is not yet initialized.
@@ skipping 59 matching lines @@
   void UpdateRoutesToCastModesMapping();
 
   // Returns the default presentation request's frame URL if there is one.
   // Otherwise returns an empty GURL.
   GURL GetFrameURL() const;
 
   // Returns the serialized origin for |initiator_|, or the serialization of an
   // opaque origin ("null") if |initiator_| is not set.
   std::string GetSerializedInitiatorOrigin() const;
 
+  // Returns true if |routes_| contains a route with |route_id|.
+  bool IsValidRouteId(const MediaRoute::Id& route_id) const;
+
   // Owned by the |web_ui| passed in the ctor, and guaranteed to be deleted
   // only after it has deleted |this|.
   MediaRouterWebUIMessageHandler* handler_ = nullptr;
 
   // These are non-null while this instance is registered to receive
   // updates from them.
   std::unique_ptr<IssuesObserver> issues_observer_;
   std::unique_ptr<MediaRoutesObserver> routes_observer_;
 
   // Set to true by |handler_| when the UI has been initialized.
@@ skipping 37 matching lines @@
 
   content::WebContents* initiator_;
 
   // Pointer to the MediaRouter for this instance's BrowserContext.
   MediaRouter* router_;
 
   // The start time for UI initialization metrics timer. When a dialog has been
   // been painted and initialized with initial data, this should be cleared.
   base::Time start_time_;
 
+  // The ID of the media route shown in the route details view.
+  base::Optional<MediaRoute::Id> selected_route_;
+
+  // The media controller for |selected_route_|.
+  MediaRouteController* route_controller_ = nullptr;
+
+  // The observer for the media status of |selected_route_| that notifies
+  // |handler_| of updates.
+  std::unique_ptr<UIMediaRouteStatusObserver> route_status_observer_;
+
   // NOTE: Weak pointers must be invalidated before all other member variables.
   // Therefore |weak_factory_| must be placed at the end.
   base::WeakPtrFactory<MediaRouterUI> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(MediaRouterUI);
 };
 
 }  // namespace media_router
 
 #endif  // CHROME_BROWSER_UI_WEBUI_MEDIA_ROUTER_MEDIA_ROUTER_UI_H_