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// Copyright (c) 2012 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.
#ifndef CONTENT_BROWSER_DEVICE_ORIENTATION_OBSERVER_DELEGATE_H_
#define CONTENT_BROWSER_DEVICE_ORIENTATION_OBSERVER_DELEGATE_H_
#include "content/browser/device_orientation/device_data.h"
#include "content/browser/device_orientation/provider.h"
namespace IPC {
class Sender;
}
namespace content {
class ObserverDelegate
: public base::RefCounted<ObserverDelegate>, public Provider::Observer {
public:
// Create ObserverDelegate that observes provider and forwards updates to
// render_view_id.
// Will stop observing provider when destructed.
ObserverDelegate(DeviceData::Type device_data_type, Provider* provider,
int render_view_id, IPC::Sender* sender);
// From Provider::Observer.
virtual void OnDeviceDataUpdate(const DeviceData* device_data,
DeviceData::Type device_data_type) OVERRIDE;
private:
static DeviceData* EmptyDeviceData(DeviceData::Type type);
friend class base::RefCounted<ObserverDelegate>;
virtual ~ObserverDelegate();
scoped_refptr<Provider> provider_;
int render_view_id_;
IPC::Sender* sender_; // Weak pointer.
DISALLOW_COPY_AND_ASSIGN(ObserverDelegate);
};
} // namespace content
#endif // CONTENT_BROWSER_DEVICE_ORIENTATION_OBSERVER_DELEGATE_H_
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