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// Copyright 2015 Google Inc. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#ifndef COBALT_CSSOM_RESOLUTION_VALUE_H_
#define COBALT_CSSOM_RESOLUTION_VALUE_H_
#include <string>
#include "base/basictypes.h"
#include "base/compiler_specific.h"
#include "cobalt/base/polymorphic_equatable.h"
#include "cobalt/cssom/property_value.h"
namespace cobalt {
namespace cssom {
class PropertyValueVisitor;
enum ResolutionUnit {
kDPIUnit,
kDPCMUnit,
};
// Represents a resolution value.
// Applies to resolution media feature.
// See https://www.w3.org/TR/css3-mediaqueries/#resolution and
// https://www.w3.org/TR/css3-mediaqueries/#resolution0 for details.
class ResolutionValue : public PropertyValue {
public:
ResolutionValue(float value, ResolutionUnit unit)
: value_(value), unit_(unit) {}
void Accept(PropertyValueVisitor* visitor) override;
float value() const { return value_; }
ResolutionUnit unit() const { return unit_; }
// Returns the value in dpi.
float dpi_value() const;
std::string ToString() const override;
bool operator==(const ResolutionValue& other) const {
return value_ == other.value_ && unit_ == other.unit_;
}
DEFINE_POLYMORPHIC_EQUATABLE_TYPE(ResolutionValue);
private:
~ResolutionValue() override {}
const float value_;
const ResolutionUnit unit_;
DISALLOW_COPY_AND_ASSIGN(ResolutionValue);
};
} // namespace cssom
} // namespace cobalt
#endif // COBALT_CSSOM_RESOLUTION_VALUE_H_