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/*
* Copyright 2014 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_FONT_WEIGHT_VALUE_H_
#define COBALT_CSSOM_FONT_WEIGHT_VALUE_H_
#include <string>
#include "base/basictypes.h"
#include "base/compiler_specific.h"
#include "base/memory/ref_counted.h"
#include "cobalt/base/polymorphic_equatable.h"
#include "cobalt/cssom/property_value.h"
namespace cobalt {
namespace cssom {
class PropertyValueVisitor;
// Specifies the weight of glyphs in the font, their degree of blackness
// or stroke thickness.
// https://www.w3.org/TR/css3-fonts/#font-weight-prop
class FontWeightValue : public PropertyValue {
public:
enum Value {
kThinAka100,
kExtraLightAka200, // same as Ultra Light
kLightAka300,
kNormalAka400,
kMediumAka500,
kSemiBoldAka600, // same as Demi Bold
kBoldAka700,
kExtraBoldAka800, // same as Ultra Bold
kBlackAka900, // same as Heavy
};
// For the sake of saving memory an explicit instantiation of this class
// is disallowed. Use factory methods below to obtain shared instances.
static const scoped_refptr<FontWeightValue>& GetThinAka100();
static const scoped_refptr<FontWeightValue>& GetExtraLightAka200();
static const scoped_refptr<FontWeightValue>& GetLightAka300();
static const scoped_refptr<FontWeightValue>& GetNormalAka400();
static const scoped_refptr<FontWeightValue>& GetMediumAka500();
static const scoped_refptr<FontWeightValue>& GetSemiBoldAka600();
static const scoped_refptr<FontWeightValue>& GetBoldAka700();
static const scoped_refptr<FontWeightValue>& GetExtraBoldAka800();
static const scoped_refptr<FontWeightValue>& GetBlackAka900();
void Accept(PropertyValueVisitor* visitor) OVERRIDE;
Value value() const { return value_; }
std::string ToString() const OVERRIDE;
bool operator==(const FontWeightValue& other) const {
return value_ == other.value_;
}
DEFINE_POLYMORPHIC_EQUATABLE_TYPE(FontWeightValue);
// Implementation detail, has to be public in order to be constructible.
struct NonTrivialStaticFields;
private:
explicit FontWeightValue(Value value) : value_(value) {}
~FontWeightValue() OVERRIDE {}
const Value value_;
DISALLOW_COPY_AND_ASSIGN(FontWeightValue);
};
} // namespace cssom
} // namespace cobalt
#endif // COBALT_CSSOM_FONT_WEIGHT_VALUE_H_