content/browser/device_orientation/observer_delegate.cc

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "content/browser/device_orientation/observer_delegate.h"
   6
   7 #include "base/logging.h"
   8 #include "content/browser/device_orientation/device_data.h"
   9 #include "content/browser/device_orientation/motion.h"
  10 #include "content/browser/device_orientation/orientation.h"
  11 #include "ipc/ipc_sender.h"
  12
  13 namespace content {
  14
  15 ObserverDelegate::ObserverDelegate(DeviceData::Type device_data_type,
  16                                    Provider* provider, int render_view_id,
  17                                    IPC::Sender* sender)
  18     : Observer(device_data_type),
  19       provider_(provider),
  20       render_view_id_(render_view_id),
  21       sender_(sender) {
  22   provider_->AddObserver(this);
  23 }
  24
  25 ObserverDelegate::~ObserverDelegate() {
  26   provider_->RemoveObserver(this);
  27 }
  28
  29 void ObserverDelegate::OnDeviceDataUpdate(
  30     const DeviceData* device_data, DeviceData::Type device_data_type) {
  31   scoped_refptr<const DeviceData> new_device_data(device_data);
  32   if (!new_device_data)
  33     new_device_data = EmptyDeviceData(device_data_type);
  34
  35   sender_->Send(new_device_data->CreateIPCMessage(render_view_id_));
  36 }
  37
  38 DeviceData* ObserverDelegate::EmptyDeviceData(DeviceData::Type type) {
  39   switch (type) {
  40     case DeviceData::kTypeMotion:
  41       return new Motion();
  42     case DeviceData::kTypeOrientation:
  43       return new Orientation();
  44     case DeviceData::kTypeTest:
  45       NOTREACHED();
  46   }
  47   NOTREACHED();
  48   return NULL;
  49 }
  50
  51 }  // namespace content