| // Copyright 2014 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/browser/device_sensors/device_motion_message_filter.h" |
| |
| #include "content/browser/device_sensors/device_inertial_sensor_service.h" |
| #include "content/common/device_sensors/device_motion_messages.h" |
| |
| namespace content { |
| |
| DeviceMotionMessageFilter::DeviceMotionMessageFilter() |
| : BrowserMessageFilter(DeviceMotionMsgStart), |
| is_started_(false) { |
| } |
| |
| DeviceMotionMessageFilter::~DeviceMotionMessageFilter() { |
| DCHECK_CURRENTLY_ON(BrowserThread::IO); |
| if (is_started_) |
| DeviceInertialSensorService::GetInstance()->RemoveConsumer( |
| CONSUMER_TYPE_MOTION); |
| } |
| |
| bool DeviceMotionMessageFilter::OnMessageReceived(const IPC::Message& message) { |
| bool handled = true; |
| IPC_BEGIN_MESSAGE_MAP(DeviceMotionMessageFilter, message) |
| IPC_MESSAGE_HANDLER(DeviceMotionHostMsg_StartPolling, |
| OnDeviceMotionStartPolling) |
| IPC_MESSAGE_HANDLER(DeviceMotionHostMsg_StopPolling, |
| OnDeviceMotionStopPolling) |
| IPC_MESSAGE_UNHANDLED(handled = false) |
| IPC_END_MESSAGE_MAP() |
| return handled; |
| } |
| |
| void DeviceMotionMessageFilter::OnDeviceMotionStartPolling() { |
| DCHECK(!is_started_); |
| if (is_started_) |
| return; |
| is_started_ = true; |
| DeviceInertialSensorService::GetInstance()->AddConsumer( |
| CONSUMER_TYPE_MOTION); |
| DidStartDeviceMotionPolling(); |
| } |
| |
| void DeviceMotionMessageFilter::OnDeviceMotionStopPolling() { |
| DCHECK(is_started_); |
| if (!is_started_) |
| return; |
| is_started_ = false; |
| DeviceInertialSensorService::GetInstance()->RemoveConsumer( |
| CONSUMER_TYPE_MOTION); |
| } |
| |
| void DeviceMotionMessageFilter::DidStartDeviceMotionPolling() { |
| Send(new DeviceMotionMsg_DidStartPolling( |
| DeviceInertialSensorService::GetInstance()-> |
| GetSharedMemoryHandleForProcess( |
| CONSUMER_TYPE_MOTION, PeerHandle()))); |
| } |
| |
| } // namespace content |