| // 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_PERCENTAGE_VALUE_H_ |
| #define COBALT_CSSOM_PERCENTAGE_VALUE_H_ |
| |
| #include <string> |
| |
| #include "base/basictypes.h" |
| #include "base/compiler_specific.h" |
| #include "base/stringprintf.h" |
| #include "cobalt/base/polymorphic_equatable.h" |
| #include "cobalt/cssom/property_value.h" |
| |
| namespace cobalt { |
| namespace cssom { |
| |
| class PropertyValueVisitor; |
| |
| // Percentage values are always relative to another value, for example a length. |
| // Each property that allows percentages also defines the value to which |
| // the percentage refers. |
| // https://www.w3.org/TR/css3-values/#percentages |
| class PercentageValue : public PropertyValue { |
| public: |
| // A |value| is a normalized factor, where 1 means 100%. |
| explicit PercentageValue(float value) : value_(value) {} |
| |
| void Accept(PropertyValueVisitor* visitor) override; |
| |
| // Returns a normalized factor, where 1 means 100%. |
| float value() const { return value_; } |
| |
| std::string ToString() const override { |
| return base::StringPrintf("%.7g%%", value_ * 100); |
| } |
| |
| bool operator==(const PercentageValue& other) const { |
| return value_ == other.value_; |
| } |
| |
| DEFINE_POLYMORPHIC_EQUATABLE_TYPE(PercentageValue); |
| |
| private: |
| ~PercentageValue() override {} |
| |
| const float value_; |
| |
| DISALLOW_COPY_AND_ASSIGN(PercentageValue); |
| }; |
| |
| } // namespace cssom |
| } // namespace cobalt |
| |
| #endif // COBALT_CSSOM_PERCENTAGE_VALUE_H_ |