cobalt/cssom/matrix_function.h

// 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_MATRIX_FUNCTION_H_
#define COBALT_CSSOM_MATRIX_FUNCTION_H_

#include <string>

#include "base/compiler_specific.h"
#include "cobalt/base/polymorphic_equatable.h"
#include "cobalt/cssom/transform_function.h"
#include "cobalt/math/matrix3_f.h"

namespace cobalt {
namespace cssom {

class TransformFunctionVisitor;

// The matrix function allows one to specify a 2D 2x3 affine transformation
// as a matrix.
//   https://www.w3.org/TR/css-transforms-1/#funcdef-matrix
class MatrixFunction : public TransformFunction {
 public:
  explicit MatrixFunction(const math::Matrix3F& matrix);

  MatrixFunction(float m00, float m10, float m01, float m11, float m02,
                 float m12);

  void Accept(TransformFunctionVisitor* visitor) const override;

  const math::Matrix3F& value() const { return value_; }

  std::string ToString() const override;

  math::Matrix3F ToMatrix(const math::SizeF& used_size,
                          const scoped_refptr<ui_navigation::NavItem>&
                              used_ui_nav_focus) const override {
    return value_;
  }

  bool operator==(const MatrixFunction& other) const {
    return value_ == other.value_;
  }

  DEFINE_POLYMORPHIC_EQUATABLE_TYPE(MatrixFunction);

 private:
  const math::Matrix3F value_;
};

}  // namespace cssom
}  // namespace cobalt

#endif  // COBALT_CSSOM_MATRIX_FUNCTION_H_