Reland of mojo VR interface simpified.

device/vr/vr_service_impl.cc

 // Copyright 2016 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 "device/vr/vr_service_impl.h"
 
 #include <utility>
 
 #include "base/bind.h"
 #include "device/vr/vr_device.h"
 #include "device/vr/vr_device_manager.h"
 
 namespace device {
 
 VRServiceImpl::VRServiceImpl() {}
 
 VRServiceImpl::~VRServiceImpl() {
   RemoveFromDeviceManager();
 }
 
-void VRServiceImpl::BindRequest(mojo::InterfaceRequest<VRService> request) {
+void VRServiceImpl::BindRequest(
+    mojo::InterfaceRequest<mojom::VRService> request) {
   VRServiceImpl* service = new VRServiceImpl();
   service->Bind(std::move(request));
 }
 
-void VRServiceImpl::Bind(mojo::InterfaceRequest<VRService> request) {
-  binding_.reset(new mojo::Binding<VRService>(this, std::move(request)));
+// Gets a VRDisplayPtr unique to this service so that the associated page can
+// communicate with the VRDevice.
+VRDisplayImpl* VRServiceImpl::GetVRDisplayImpl(VRDevice* device) {
+  DisplayImplMap::iterator it = displays_.find(device);
+  if (it != displays_.end())
+    return it->second.get();
+
+  VRDisplayImpl* display_impl = new VRDisplayImpl(device, this);
+  displays_[device] = base::WrapUnique(display_impl);
+  return display_impl;
+}
+
+void VRServiceImpl::Bind(mojo::InterfaceRequest<mojom::VRService> request) {
+  // TODO(shaobo.yan@intel.com) : Keep one binding_ and use close and rebind.
+  binding_.reset(new mojo::Binding<mojom::VRService>(this, std::move(request)));
   binding_->set_connection_error_handler(base::Bind(
       &VRServiceImpl::RemoveFromDeviceManager, base::Unretained(this)));
 }
 
 void VRServiceImpl::RemoveFromDeviceManager() {
+  displays_.clear();
   VRDeviceManager* device_manager = VRDeviceManager::GetInstance();
   device_manager->RemoveService(this);
 }
 
-void VRServiceImpl::SetClient(VRServiceClientPtr client) {
+void VRServiceImpl::RemoveDevice(VRDevice* device) {
+  displays_.erase(device);
+}
+
+void VRServiceImpl::SetClient(mojom::VRServiceClientPtr service_client,
+                              const SetClientCallback& callback) {
   DCHECK(!client_.get());
 
-  client_ = std::move(client);
+  client_ = std::move(service_client);
   VRDeviceManager* device_manager = VRDeviceManager::GetInstance();
+  // Once a client has been connected AddService will force any VRDisplays to
+  // send OnConnected to it so that it's populated with the currently active
+  // displays. Thereafer it will stay up to date by virtue of listening for new
+  // connected events.
   device_manager->AddService(this);
-}
-
-void VRServiceImpl::GetDisplays(const GetDisplaysCallback& callback) {
-  VRDeviceManager* device_manager = VRDeviceManager::GetInstance();
-  callback.Run(device_manager->GetVRDevices());
-}
-
-void VRServiceImpl::GetPose(uint32_t index, const GetPoseCallback& callback) {
-  VRDevice* device = VRDeviceManager::GetAllowedDevice(this, index);
-
-  if (device) {
-    callback.Run(device->GetPose());
-  } else {
-    callback.Run(nullptr);
-  }
-}
-
-void VRServiceImpl::ResetPose(uint32_t index) {
-  VRDevice* device = VRDeviceManager::GetAllowedDevice(this, index);
-  if (device)
-    device->ResetPose();
-}
-
-void VRServiceImpl::RequestPresent(uint32_t index,
-                                   bool secureOrigin,
-                                   const RequestPresentCallback& callback) {
-  VRDeviceManager* device_manager = VRDeviceManager::GetInstance();
-  callback.Run(device_manager->RequestPresent(this, index, secureOrigin));
-}
-
-void VRServiceImpl::ExitPresent(uint32_t index) {
-  VRDeviceManager* device_manager = VRDeviceManager::GetInstance();
-  device_manager->ExitPresent(this, index);
-}
-
-void VRServiceImpl::SubmitFrame(uint32_t index, VRPosePtr pose) {
-  VRDeviceManager* device_manager = VRDeviceManager::GetInstance();
-  device_manager->SubmitFrame(this, index, std::move(pose));
-}
-
-void VRServiceImpl::UpdateLayerBounds(uint32_t index,
-                                      VRLayerBoundsPtr leftBounds,
-                                      VRLayerBoundsPtr rightBounds) {
-  VRDevice* device = VRDeviceManager::GetAllowedDevice(this, index);
-  if (device)
-    device->UpdateLayerBounds(std::move(leftBounds), std::move(rightBounds));
+  callback.Run(device_manager->GetNumberOfConnectedDevices());
 }
 
 }  // namespace device