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1 // Copyright 2014 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_sensors/device_motion_message_filter.h" | |
6 | |
7 #include "content/browser/device_sensors/device_inertial_sensor_service.h" | |
8 #include "content/common/device_sensors/device_motion_messages.h" | |
9 | |
10 namespace content { | |
11 | |
12 DeviceMotionMessageFilter::DeviceMotionMessageFilter() | |
13 : BrowserMessageFilter(DeviceMotionMsgStart), | |
14 is_started_(false) { | |
15 } | |
16 | |
17 DeviceMotionMessageFilter::~DeviceMotionMessageFilter() { | |
18 DCHECK_CURRENTLY_ON(BrowserThread::IO); | |
19 if (is_started_) | |
20 DeviceInertialSensorService::GetInstance()->RemoveConsumer( | |
21 CONSUMER_TYPE_MOTION); | |
22 } | |
23 | |
24 bool DeviceMotionMessageFilter::OnMessageReceived(const IPC::Message& message) { | |
25 bool handled = true; | |
26 IPC_BEGIN_MESSAGE_MAP(DeviceMotionMessageFilter, message) | |
27 IPC_MESSAGE_HANDLER(DeviceMotionHostMsg_StartPolling, | |
28 OnDeviceMotionStartPolling) | |
29 IPC_MESSAGE_HANDLER(DeviceMotionHostMsg_StopPolling, | |
30 OnDeviceMotionStopPolling) | |
31 IPC_MESSAGE_UNHANDLED(handled = false) | |
32 IPC_END_MESSAGE_MAP() | |
33 return handled; | |
34 } | |
35 | |
36 void DeviceMotionMessageFilter::OnDeviceMotionStartPolling() { | |
37 DCHECK(!is_started_); | |
38 if (is_started_) | |
39 return; | |
40 is_started_ = true; | |
41 DeviceInertialSensorService::GetInstance()->AddConsumer( | |
42 CONSUMER_TYPE_MOTION); | |
43 DidStartDeviceMotionPolling(); | |
44 } | |
45 | |
46 void DeviceMotionMessageFilter::OnDeviceMotionStopPolling() { | |
47 DCHECK(is_started_); | |
48 if (!is_started_) | |
49 return; | |
50 is_started_ = false; | |
51 DeviceInertialSensorService::GetInstance()->RemoveConsumer( | |
52 CONSUMER_TYPE_MOTION); | |
53 } | |
54 | |
55 void DeviceMotionMessageFilter::DidStartDeviceMotionPolling() { | |
56 Send(new DeviceMotionMsg_DidStartPolling( | |
57 DeviceInertialSensorService::GetInstance()-> | |
58 GetSharedMemoryHandleForProcess( | |
59 CONSUMER_TYPE_MOTION, PeerHandle()))); | |
60 } | |
61 | |
62 } // namespace content | |
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