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// Copyright (c) 2010 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 "chrome/browser/device_orientation/dispatcher_host.h"
#include "base/scoped_ptr.h"
#include "chrome/browser/chrome_thread.h"
#include "chrome/browser/device_orientation/orientation.h"
#include "chrome/browser/device_orientation/provider.h"
#include "chrome/browser/renderer_host/render_view_host.h"
#include "chrome/browser/renderer_host/render_view_host_notification_task.h"
#include "chrome/common/chrome_switches.h"
#include "chrome/common/render_messages.h"
#include "ipc/ipc_message.h"
namespace device_orientation {
DispatcherHost::DispatcherHost(int process_id)
: process_id_(process_id) {
}
DispatcherHost::~DispatcherHost() {
if (provider_)
provider_->RemoveObserver(this);
}
bool DispatcherHost::OnMessageReceived(const IPC::Message& msg,
bool* msg_was_ok) {
DCHECK(ChromeThread::CurrentlyOn(ChromeThread::IO));
bool handled = true;
IPC_BEGIN_MESSAGE_MAP_EX(DispatcherHost, msg, *msg_was_ok)
IPC_MESSAGE_HANDLER(ViewHostMsg_DeviceOrientation_StartUpdating,
OnStartUpdating)
IPC_MESSAGE_HANDLER(ViewHostMsg_DeviceOrientation_StopUpdating,
OnStopUpdating)
IPC_MESSAGE_UNHANDLED(handled = false)
IPC_END_MESSAGE_MAP()
return handled;
}
void DispatcherHost::OnOrientationUpdate(const Orientation& orientation) {
ViewMsg_DeviceOrientationUpdated_Params params;
params.can_provide_alpha = orientation.can_provide_alpha_;
params.alpha = orientation.alpha_;
params.can_provide_beta = orientation.can_provide_beta_;
params.beta = orientation.beta_;
params.can_provide_gamma = orientation.can_provide_gamma_;
params.gamma = orientation.gamma_;
typedef std::set<int>::const_iterator Iterator;
for (Iterator i = render_view_ids_.begin(), e = render_view_ids_.end();
i != e; ++i) {
IPC::Message* message = new ViewMsg_DeviceOrientationUpdated(*i, params);
CallRenderViewHost(process_id_, *i, &RenderViewHost::Send, message);
}
}
void DispatcherHost::OnStartUpdating(int render_view_id) {
DCHECK(ChromeThread::CurrentlyOn(ChromeThread::IO));
render_view_ids_.insert(render_view_id);
if (render_view_ids_.size() == 1) {
DCHECK(!provider_);
provider_ = Provider::GetInstance();
provider_->AddObserver(this);
}
}
void DispatcherHost::OnStopUpdating(int render_view_id) {
DCHECK(ChromeThread::CurrentlyOn(ChromeThread::IO));
render_view_ids_.erase(render_view_id);
if (render_view_ids_.empty()) {
provider_->RemoveObserver(this);
provider_ = NULL;
}
}
} // namespace device_orientation
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