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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/browser/device_orientation/dispatcher_host.h" | |
| 6 | |
| 7 #include "base/scoped_ptr.h" | |
| 8 #include "chrome/browser/browser_thread.h" | |
| 9 #include "chrome/browser/device_orientation/orientation.h" | |
| 10 #include "chrome/browser/device_orientation/provider.h" | |
| 11 #include "chrome/browser/renderer_host/render_view_host.h" | |
| 12 #include "chrome/browser/renderer_host/render_view_host_notification_task.h" | |
| 13 #include "chrome/common/render_messages.h" | |
| 14 #include "chrome/common/render_messages_params.h" | |
| 15 #include "ipc/ipc_message.h" | |
| 16 | |
| 17 namespace device_orientation { | |
| 18 | |
| 19 DispatcherHost::DispatcherHost(int process_id) | |
| 20 : process_id_(process_id), | |
| 21 observers_map_(), | |
| 22 provider_(NULL) { | |
| 23 } | |
| 24 | |
| 25 DispatcherHost::~DispatcherHost() { | |
| 26 } | |
| 27 | |
| 28 class DispatcherHost::ObserverDelegate | |
| 29 : public base::RefCounted<ObserverDelegate>, public Provider::Observer { | |
| 30 public: | |
| 31 // Create ObserverDelegate that observes provider and forwards updates to | |
| 32 // render_view_id in process_id. | |
| 33 // Will stop observing provider when destructed. | |
| 34 ObserverDelegate(Provider* provider, | |
| 35 int process_id, | |
| 36 int render_view_id); | |
| 37 | |
| 38 // From Provider::Observer. | |
| 39 virtual void OnOrientationUpdate(const Orientation& orientation); | |
| 40 | |
| 41 private: | |
| 42 friend class base::RefCounted<ObserverDelegate>; | |
| 43 virtual ~ObserverDelegate(); | |
| 44 | |
| 45 scoped_refptr<Provider> provider_; | |
| 46 int process_id_; | |
| 47 int render_view_id_; | |
| 48 | |
| 49 DISALLOW_COPY_AND_ASSIGN(ObserverDelegate); | |
| 50 }; | |
| 51 | |
| 52 DispatcherHost::ObserverDelegate::ObserverDelegate(Provider* provider, | |
| 53 int process_id, | |
| 54 int render_view_id) | |
| 55 : provider_(provider), | |
| 56 process_id_(process_id), | |
| 57 render_view_id_(render_view_id) { | |
| 58 provider_->AddObserver(this); | |
| 59 } | |
| 60 | |
| 61 DispatcherHost::ObserverDelegate::~ObserverDelegate() { | |
| 62 provider_->RemoveObserver(this); | |
| 63 } | |
| 64 | |
| 65 void DispatcherHost::ObserverDelegate::OnOrientationUpdate( | |
| 66 const Orientation& orientation) { | |
| 67 ViewMsg_DeviceOrientationUpdated_Params params; | |
| 68 params.can_provide_alpha = orientation.can_provide_alpha_; | |
| 69 params.alpha = orientation.alpha_; | |
| 70 params.can_provide_beta = orientation.can_provide_beta_; | |
| 71 params.beta = orientation.beta_; | |
| 72 params.can_provide_gamma = orientation.can_provide_gamma_; | |
| 73 params.gamma = orientation.gamma_; | |
| 74 | |
| 75 IPC::Message* message = new ViewMsg_DeviceOrientationUpdated(render_view_id_, | |
| 76 params); | |
| 77 CallRenderViewHost(process_id_, render_view_id_, &RenderViewHost::Send, | |
| 78 message); | |
| 79 } | |
| 80 | |
| 81 bool DispatcherHost::OnMessageReceived(const IPC::Message& msg, | |
| 82 bool* msg_was_ok) { | |
| 83 DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO)); | |
| 84 bool handled = true; | |
| 85 IPC_BEGIN_MESSAGE_MAP_EX(DispatcherHost, msg, *msg_was_ok) | |
| 86 IPC_MESSAGE_HANDLER(ViewHostMsg_DeviceOrientation_StartUpdating, | |
| 87 OnStartUpdating) | |
| 88 IPC_MESSAGE_HANDLER(ViewHostMsg_DeviceOrientation_StopUpdating, | |
| 89 OnStopUpdating) | |
| 90 IPC_MESSAGE_UNHANDLED(handled = false) | |
| 91 IPC_END_MESSAGE_MAP() | |
| 92 return handled; | |
| 93 } | |
| 94 | |
| 95 void DispatcherHost::OnStartUpdating(int render_view_id) { | |
| 96 DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO)); | |
| 97 | |
| 98 if (!provider_) | |
| 99 provider_ = Provider::GetInstance(); | |
| 100 | |
| 101 observers_map_[render_view_id] = new ObserverDelegate(provider_, | |
| 102 process_id_, | |
| 103 render_view_id); | |
| 104 } | |
| 105 | |
| 106 void DispatcherHost::OnStopUpdating(int render_view_id) { | |
| 107 DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO)); | |
| 108 | |
| 109 observers_map_.erase(render_view_id); | |
| 110 } | |
| 111 | |
| 112 } // namespace device_orientation | |
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Chromium Code Reviews
Issue 5698008:
Switch a bunch of remaining filters to derive from BrowserMessageFilters so t... (Closed)
Base URL: svn://chrome-svn/chrome/trunk/src/