core/fxge/cfx_path.h

// Copyright 2016 PDFium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com

#ifndef CORE_FXGE_CFX_PATH_H_
#define CORE_FXGE_CFX_PATH_H_

#include <stdint.h>

#include <vector>

#include "core/fxcrt/fx_coordinates.h"
#include "core/fxcrt/retain_ptr.h"
#include "third_party/abseil-cpp/absl/types/optional.h"

class CFX_Path {
 public:
  class Point {
   public:
    enum class Type : uint8_t { kLine, kBezier, kMove };

    Point();
    Point(const CFX_PointF& point, Type type, bool close);
    Point(const Point& other);
    ~Point();

    bool IsTypeAndOpen(Type type) const {
      return m_Type == type && !m_CloseFigure;
    }

    CFX_PointF m_Point;
    Type m_Type;
    bool m_CloseFigure;
  };

  CFX_Path();
  CFX_Path(const CFX_Path& src);
  CFX_Path(CFX_Path&& src) noexcept;
  ~CFX_Path();

  void Clear();

  Point::Type GetType(size_t index) const { return m_Points[index].m_Type; }
  bool IsClosingFigure(size_t index) const {
    return m_Points[index].m_CloseFigure;
  }
  CFX_PointF GetPoint(size_t index) const { return m_Points[index].m_Point; }
  const std::vector<Point>& GetPoints() const { return m_Points; }
  std::vector<Point>& GetPoints() { return m_Points; }

  CFX_FloatRect GetBoundingBox() const;
  CFX_FloatRect GetBoundingBoxForStrokePath(float line_width,
                                            float miter_limit) const;

  void Transform(const CFX_Matrix& matrix);
  bool IsRect() const;
  absl::optional<CFX_FloatRect> GetRect(const CFX_Matrix* matrix) const;

  void Append(const CFX_Path& src, const CFX_Matrix* matrix);
  void AppendFloatRect(const CFX_FloatRect& rect);
  void AppendRect(float left, float bottom, float right, float top);
  void AppendLine(const CFX_PointF& pt1, const CFX_PointF& pt2);
  void AppendPoint(const CFX_PointF& point, Point::Type type);
  void AppendPointAndClose(const CFX_PointF& point, Point::Type type);
  void ClosePath();

 private:
  std::vector<Point> m_Points;
};

class CFX_RetainablePath final : public Retainable, public CFX_Path {
 public:
  CONSTRUCT_VIA_MAKE_RETAIN;

  RetainPtr<CFX_RetainablePath> Clone() const;

 private:
  CFX_RetainablePath();
  CFX_RetainablePath(const CFX_RetainablePath& src);
  ~CFX_RetainablePath() override;
};

#endif  // CORE_FXGE_CFX_PATH_H_