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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_ORIENTATION_H_
#define CONTENT_BROWSER_DEVICE_ORIENTATION_ORIENTATION_H_
#include "base/compiler_specific.h"
#include "content/browser/device_orientation/device_data.h"
#include "content/common/content_export.h"
namespace content {
class Orientation : public DeviceData {
public:
// alpha, beta, gamma and absolute are the rotations around the axes as
// specified in http://dev.w3.org/geo/api/spec-source-orientation.html
//
// can_provide_{alpha,beta,gamma,absolute} is true if data can be provided
// for that variable.
CONTENT_EXPORT Orientation();
// From DeviceData.
virtual IPC::Message* CreateIPCMessage(int render_view_id) const OVERRIDE;
virtual bool ShouldFireEvent(const DeviceData* old_data) const OVERRIDE;
void set_alpha(double alpha) {
can_provide_alpha_ = true;
alpha_ = alpha;
}
bool can_provide_alpha() const { return can_provide_alpha_; }
double alpha() const { return alpha_; }
void set_beta(double beta) {
can_provide_beta_ = true;
beta_ = beta;
}
bool can_provide_beta() const { return can_provide_beta_; }
double beta() const { return beta_; }
void set_gamma(double gamma) {
can_provide_gamma_ = true;
gamma_ = gamma;
}
bool can_provide_gamma() const { return can_provide_gamma_; }
double gamma() const { return gamma_; }
void set_absolute(bool absolute) {
can_provide_absolute_ = true;
absolute_ = absolute;
}
bool can_provide_absolute() const { return can_provide_absolute_; }
bool absolute() const { return absolute_; }
private:
virtual ~Orientation();
static bool IsElementSignificantlyDifferent(bool can_provide_element1,
bool can_provide_element2, double element1, double element2);
double alpha_;
double beta_;
double gamma_;
bool absolute_;
bool can_provide_alpha_;
bool can_provide_beta_;
bool can_provide_gamma_;
bool can_provide_absolute_;
};
} // namespace content
#endif // CONTENT_BROWSER_DEVICE_ORIENTATION_ORIENTATION_H_
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