| // Copyright 2015 The Cobalt Authors. 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_LINEAR_GRADIENT_VALUE_H_ |
| #define COBALT_CSSOM_LINEAR_GRADIENT_VALUE_H_ |
| |
| #include <string> |
| #include <vector> |
| |
| #include "base/basictypes.h" |
| #include "base/compiler_specific.h" |
| #include "base/memory/ref_counted.h" |
| #include "base/optional.h" |
| #include "cobalt/base/polymorphic_equatable.h" |
| #include "cobalt/cssom/color_stop.h" |
| #include "cobalt/cssom/property_value.h" |
| |
| namespace cobalt { |
| namespace cssom { |
| |
| // The angle or side_or_corner specifies the gradient line, which gives the |
| // gradient a direction and determines how color-stops are positioned. |
| // https://www.w3.org/TR/css3-images/#linear-gradients |
| class LinearGradientValue : public PropertyValue { |
| public: |
| enum SideOrCorner { |
| kBottom, |
| kBottomLeft, |
| kBottomRight, |
| kLeft, |
| kRight, |
| kTop, |
| kTopLeft, |
| kTopRight, |
| }; |
| |
| LinearGradientValue(float angle_in_radians, ColorStopList color_stop_list) |
| : angle_in_radians_(angle_in_radians), |
| color_stop_list_(std::move(color_stop_list)) {} |
| |
| LinearGradientValue(SideOrCorner side_or_corner, |
| ColorStopList color_stop_list) |
| : side_or_corner_(side_or_corner), |
| color_stop_list_(std::move(color_stop_list)) {} |
| |
| void Accept(PropertyValueVisitor* visitor) override; |
| |
| const base::Optional<float>& angle_in_radians() const { |
| return angle_in_radians_; |
| } |
| const base::Optional<SideOrCorner>& side_or_corner() const { |
| return side_or_corner_; |
| } |
| const ColorStopList& color_stop_list() const { return color_stop_list_; } |
| |
| std::string ToString() const override; |
| |
| bool operator==(const LinearGradientValue& other) const; |
| |
| DEFINE_POLYMORPHIC_EQUATABLE_TYPE(LinearGradientValue); |
| |
| private: |
| ~LinearGradientValue() override {} |
| |
| // Exactly one of |angle_in_radians_| and |side_or_corner_| is engaged. |
| const base::Optional<float> angle_in_radians_; |
| const base::Optional<SideOrCorner> side_or_corner_; |
| const ColorStopList color_stop_list_; |
| |
| DISALLOW_COPY_AND_ASSIGN(LinearGradientValue); |
| }; |
| |
| } // namespace cssom |
| } // namespace cobalt |
| |
| #endif // COBALT_CSSOM_LINEAR_GRADIENT_VALUE_H_ |