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| 1 // Copyright (c) 2010 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 "chrome/renderer/device_orientation_dispatcher.h" | |
| 6 | |
| 7 #include "chrome/common/render_messages.h" | |
| 8 #include "chrome/common/render_messages_params.h" | |
| 9 #include "third_party/WebKit/Source/WebKit/chromium/public/WebDeviceOrientation.
h" | |
| 10 #include "third_party/WebKit/Source/WebKit/chromium/public/WebDeviceOrientationC
ontroller.h" | |
| 11 | |
| 12 DeviceOrientationDispatcher::DeviceOrientationDispatcher( | |
| 13 RenderView* render_view) | |
| 14 : RenderViewObserver(render_view), | |
| 15 controller_(NULL), | |
| 16 started_(false) { | |
| 17 } | |
| 18 | |
| 19 DeviceOrientationDispatcher::~DeviceOrientationDispatcher() { | |
| 20 if (started_) | |
| 21 stopUpdating(); | |
| 22 } | |
| 23 | |
| 24 bool DeviceOrientationDispatcher::OnMessageReceived(const IPC::Message& msg) { | |
| 25 bool handled = true; | |
| 26 IPC_BEGIN_MESSAGE_MAP(DeviceOrientationDispatcher, msg) | |
| 27 IPC_MESSAGE_HANDLER(ViewMsg_DeviceOrientationUpdated, | |
| 28 OnDeviceOrientationUpdated) | |
| 29 IPC_MESSAGE_UNHANDLED(handled = false) | |
| 30 IPC_END_MESSAGE_MAP() | |
| 31 return handled; | |
| 32 } | |
| 33 | |
| 34 void DeviceOrientationDispatcher::setController( | |
| 35 WebKit::WebDeviceOrientationController* controller) { | |
| 36 controller_.reset(controller); | |
| 37 } | |
| 38 | |
| 39 void DeviceOrientationDispatcher::startUpdating() { | |
| 40 Send(new ViewHostMsg_DeviceOrientation_StartUpdating(routing_id())); | |
| 41 started_ = true; | |
| 42 } | |
| 43 | |
| 44 void DeviceOrientationDispatcher::stopUpdating() { | |
| 45 Send(new ViewHostMsg_DeviceOrientation_StopUpdating(routing_id())); | |
| 46 started_ = false; | |
| 47 } | |
| 48 | |
| 49 WebKit::WebDeviceOrientation DeviceOrientationDispatcher::lastOrientation() | |
| 50 const { | |
| 51 if (!last_orientation_.get()) | |
| 52 return WebKit::WebDeviceOrientation::nullOrientation(); | |
| 53 | |
| 54 return *last_orientation_; | |
| 55 } | |
| 56 | |
| 57 namespace { | |
| 58 bool OrientationsEqual(const ViewMsg_DeviceOrientationUpdated_Params& a, | |
| 59 WebKit::WebDeviceOrientation* b) { | |
| 60 if (a.can_provide_alpha != b->canProvideAlpha()) | |
| 61 return false; | |
| 62 if (a.can_provide_alpha && a.alpha != b->alpha()) | |
| 63 return false; | |
| 64 if (a.can_provide_beta != b->canProvideBeta()) | |
| 65 return false; | |
| 66 if (a.can_provide_beta && a.beta != b->beta()) | |
| 67 return false; | |
| 68 if (a.can_provide_gamma != b->canProvideGamma()) | |
| 69 return false; | |
| 70 if (a.can_provide_gamma && a.gamma != b->gamma()) | |
| 71 return false; | |
| 72 | |
| 73 return true; | |
| 74 } | |
| 75 } // namespace | |
| 76 | |
| 77 void DeviceOrientationDispatcher::OnDeviceOrientationUpdated( | |
| 78 const ViewMsg_DeviceOrientationUpdated_Params& p) { | |
| 79 | |
| 80 if (last_orientation_.get() && OrientationsEqual(p, last_orientation_.get())) | |
| 81 return; | |
| 82 | |
| 83 last_orientation_.reset(new WebKit::WebDeviceOrientation(p.can_provide_alpha, | |
| 84 p.alpha, | |
| 85 p.can_provide_beta, | |
| 86 p.beta, | |
| 87 p.can_provide_gamma, | |
| 88 p.gamma)); | |
| 89 | |
| 90 controller_->didChangeDeviceOrientation(*last_orientation_); | |
| 91 } | |
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