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| 1 // Copyright (c) 2013 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/renderer_host/device_motion_browser_message_filter.h" |
| 6 |
| 7 #include "content/browser/device_orientation/device_motion_service.h" |
| 8 #include "content/common/device_motion_messages.h" |
| 9 |
| 10 namespace content { |
| 11 |
| 12 DeviceMotionBrowserMessageFilter::DeviceMotionBrowserMessageFilter() |
| 13 : is_started_(false) { |
| 14 } |
| 15 |
| 16 DeviceMotionBrowserMessageFilter::~DeviceMotionBrowserMessageFilter() { |
| 17 DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO)); |
| 18 if (is_started_) |
| 19 DeviceMotionService::GetInstance()->RemoveConsumer(); |
| 20 } |
| 21 |
| 22 bool DeviceMotionBrowserMessageFilter::OnMessageReceived( |
| 23 const IPC::Message& message, |
| 24 bool* message_was_ok) { |
| 25 bool handled = true; |
| 26 IPC_BEGIN_MESSAGE_MAP_EX(DeviceMotionBrowserMessageFilter, |
| 27 message, |
| 28 *message_was_ok) |
| 29 IPC_MESSAGE_HANDLER(DeviceMotionHostMsg_StartPolling, |
| 30 OnDeviceMotionStartPolling) |
| 31 IPC_MESSAGE_HANDLER(DeviceMotionHostMsg_StopPolling, |
| 32 OnDeviceMotionStopPolling) |
| 33 IPC_MESSAGE_UNHANDLED(handled = false) |
| 34 IPC_END_MESSAGE_MAP_EX() |
| 35 return handled; |
| 36 } |
| 37 |
| 38 void DeviceMotionBrowserMessageFilter::OnDeviceMotionStartPolling() { |
| 39 DCHECK(!is_started_); |
| 40 if (is_started_) |
| 41 return; |
| 42 is_started_ = true; |
| 43 DeviceMotionService::GetInstance()->AddConsumer(); |
| 44 DidStartDeviceMotionPolling(); |
| 45 } |
| 46 |
| 47 void DeviceMotionBrowserMessageFilter::OnDeviceMotionStopPolling() { |
| 48 DCHECK(is_started_); |
| 49 if (!is_started_) |
| 50 return; |
| 51 is_started_ = false; |
| 52 DeviceMotionService::GetInstance()->RemoveConsumer(); |
| 53 } |
| 54 |
| 55 void DeviceMotionBrowserMessageFilter::DidStartDeviceMotionPolling() { |
| 56 Send(new DeviceMotionMsg_DidStartPolling( |
| 57 DeviceMotionService::GetInstance()->GetSharedMemoryHandleForProcess( |
| 58 PeerHandle()))); |
| 59 } |
| 60 |
| 61 } // namespace content |
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