[Media Router] Custom Controls 3 - add plumbing through MRUI and MRWebUIMessageHandler

chrome/browser/ui/webui/media_router/media_router_ui.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 "chrome/browser/ui/webui/media_router/media_router_ui.h"
 
 #include <algorithm>
 #include <string>
 #include <unordered_map>
 #include <utility>
@@ skipping 13 matching lines @@
 #include "chrome/browser/media/router/media_router_metrics.h"
 #include "chrome/browser/media/router/media_routes_observer.h"
 #include "chrome/browser/media/router/media_sinks_observer.h"
 #include "chrome/browser/media/router/mojo/media_router_mojo_impl.h"
 #include "chrome/browser/media/router/presentation_service_delegate_impl.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/sessions/session_tab_helper.h"
 #include "chrome/browser/ui/webui/media_router/media_router_localized_strings_provider.h"
 #include "chrome/browser/ui/webui/media_router/media_router_resources_provider.h"
 #include "chrome/browser/ui/webui/media_router/media_router_webui_message_handler.h"
+#include "chrome/common/chrome_features.h"
 #include "chrome/common/media_router/issue.h"
 #include "chrome/common/media_router/media_route.h"
 #include "chrome/common/media_router/media_sink.h"
 #include "chrome/common/media_router/media_source.h"
 #include "chrome/common/media_router/media_source_helper.h"
 #include "chrome/common/media_router/route_request_result.h"
 #include "chrome/common/pref_names.h"
 #include "chrome/common/url_constants.h"
 #include "chrome/grit/generated_resources.h"
 #include "components/prefs/pref_service.h"
@@ skipping 102 matching lines @@
 }
 
 MediaRouterUI::UIMediaRoutesObserver::~UIMediaRoutesObserver() {}
 
 void MediaRouterUI::UIMediaRoutesObserver::OnRoutesUpdated(
     const std::vector<MediaRoute>& routes,
     const std::vector<MediaRoute::Id>& joinable_route_ids) {
   callback_.Run(routes, joinable_route_ids);
 }
 
+MediaRouterUI::UIMediaRouteControllerObserver::UIMediaRouteControllerObserver(
+    MediaRouterUI* ui,
+    scoped_refptr<MediaRouteController> controller)
+    : MediaRouteController::Observer(std::move(controller)), ui_(ui) {}
+MediaRouterUI::UIMediaRouteControllerObserver::
+    ~UIMediaRouteControllerObserver() {}
+
+void MediaRouterUI::UIMediaRouteControllerObserver::OnMediaStatusUpdated(
+    const MediaStatus& status) {
+  current_media_status_ = base::make_optional<MediaStatus>(MediaStatus(status));
+  ui_->handler_->UpdateMediaRouteStatus(status);
+}
+
+void MediaRouterUI::UIMediaRouteControllerObserver::OnControllerInvalidated() {
+  ui_->OnRouteControllerInvalidated();
+}
+
+const MediaStatus*
+MediaRouterUI::UIMediaRouteControllerObserver::GetCurrentMediaStatus() const {
+  return current_media_status_ ? &current_media_status_.value() : nullptr;
+}
+
 MediaRouterUI::MediaRouterUI(content::WebUI* web_ui)
     : ConstrainedWebDialogUI(web_ui),
       ui_initialized_(false),
       current_route_request_id_(-1),
       route_request_counter_(0),
       initiator_(nullptr),
       router_(nullptr),
       weak_factory_(this) {
   auto handler = base::MakeUnique<MediaRouterWebUIMessageHandler>(this);
   handler_ = handler.get();
@@ skipping 587 matching lines @@
     MediaRouterMetrics::RecordMediaRouterDialogLoaded(
         base::Time::Now() - start_time_);
     start_time_ = base::Time();
   }
 }
 
 void MediaRouterUI::UpdateMaxDialogHeight(int height) {
   handler_->UpdateMaxDialogHeight(height);
 }
 
+void MediaRouterUI::PlayRoute() {
+  if (route_controller_observer_)
+    route_controller_observer_->controller()->Play();
+}
+
+void MediaRouterUI::PauseRoute() {
+  if (route_controller_observer_)
+    route_controller_observer_->controller()->Pause();
+}
+
+void MediaRouterUI::SeekRoute(base::TimeDelta time) {
+  if (route_controller_observer_ &&
+      route_controller_observer_->GetCurrentMediaStatus() &&
+      time >= base::TimeDelta() &&
+      time <= route_controller_observer_->GetCurrentMediaStatus()->duration) {
+    route_controller_observer_->controller()->Seek(time);
+  }
+}
+
+void MediaRouterUI::SetRouteVolume(float volume) {
+  if (route_controller_observer_ && volume >= 0 && volume <= 1)
+    route_controller_observer_->controller()->SetVolume(volume);
+}
+
+void MediaRouterUI::SetRouteMute(bool mute) {
+  if (route_controller_observer_)
+    route_controller_observer_->controller()->SetMute(mute);
+}
+
+void MediaRouterUI::OnUIDetailsViewOpened(const MediaRoute::Id& route_id) {
+  if (!IsValidRouteId(route_id))
+    return;
+  route_controller_observer_ = base::MakeUnique<UIMediaRouteControllerObserver>(
+      this, router_->GetRouteController(route_id));

[mark a. foltz, 2017/04/26 21:01:18]

If the route is invalid, does |router_| return a nullptr route controller?
Maybe this can be simplified to eliminate IsValidRouteId.

[takumif, 2017/04/27 03:04:17]

Right, MediaRouter would return null in that case. Removed IsValidRouteId.

+}
+
+void MediaRouterUI::OnUIDetailsViewClosed() {
+  route_controller_observer_.reset();
+}
+
+bool MediaRouterUI::IsValidRouteId(const MediaRoute::Id& route_id) const {
+  return std::find_if(routes_.begin(), routes_.end(),
+                      [&route_id](const MediaRoute& route) {
+                        return route.media_route_id() == route_id;
+                      }) != routes_.end();
+}
+
+void MediaRouterUI::OnRouteControllerInvalidated() {
+  route_controller_observer_.reset();
+  handler_->OnRouteControllerInvalidated();
+}
+
 std::string MediaRouterUI::GetSerializedInitiatorOrigin() const {
   url::Origin origin = initiator_
                            ? url::Origin(initiator_->GetLastCommittedURL())
                            : url::Origin();
   return origin.Serialize();
 }
 
 }  // namespace media_router