/* This Source Code Form is subject to the terms of the Mozilla Public

 * License, v. 2.0. If a copy of the MPL was not distributed with this file,

 * You can obtain one at http://mozilla.org/MPL/2.0/. */

#ifndef CanvasPath_h

#define CanvasPath_h

#include "mozilla/Attributes.h"

#include "mozilla/RefPtr.h"

#include "nsWrapperCache.h"

#include "mozilla/gfx/2D.h"

#include "mozilla/dom/BindingDeclarations.h"

#include "mozilla/ErrorResult.h"

namespace mozilla {

namespace dom {

enum class CanvasWindingRule : uint8_t;

class SVGMatrix;

class CanvasPath final :

  public nsWrapperCache

{

public:

  NS_INLINE_DECL_CYCLE_COLLECTING_NATIVE_REFCOUNTING(CanvasPath)

  NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_NATIVE_CLASS(CanvasPath)

  nsCOMPtr<nsISupports> GetParentObject() { return mParent; }

  JSObject* WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto) override;

  static already_AddRefed<CanvasPath> Constructor(const GlobalObject& aGlobal,

                                                  ErrorResult& rv);

  static already_AddRefed<CanvasPath> Constructor(const GlobalObject& aGlobal,

                                                  CanvasPath& aCanvasPath,

                                                  ErrorResult& rv);

  static already_AddRefed<CanvasPath> Constructor(const GlobalObject& aGlobal,

                                                  const nsAString& aPathString,

                                                  ErrorResult& rv);

  void ClosePath();

  void MoveTo(double x, double y);

  void LineTo(double x, double y);

  void QuadraticCurveTo(double cpx, double cpy, double x, double y);

  void BezierCurveTo(double cp1x, double cp1y,

                     double cp2x, double cp2y,

                     double x, double y);

  void ArcTo(double x1, double y1, double x2, double y2, double radius,

             ErrorResult& error);

  void Rect(double x, double y, double w, double h);

  void Arc(double x, double y, double radius,

           double startAngle, double endAngle, bool anticlockwise,

           ErrorResult& error);

  void Ellipse(double x, double y, double radiusX, double radiusY,

               double rotation, double startAngle, double endAngle,

               bool anticlockwise, ErrorResult& error);

  void LineTo(const gfx::Point& aPoint);

  void BezierTo(const gfx::Point& aCP1,

                const gfx::Point& aCP2,

                const gfx::Point& aCP3);

  already_AddRefed<gfx::Path> GetPath(const CanvasWindingRule& aWinding,

                                  const gfx::DrawTarget* aTarget) const;

  explicit CanvasPath(nsISupports* aParent);

  // already_AddRefed arg because the return value from Path::CopyToBuilder()

  // is passed directly and we can't drop the only ref to have a raw pointer.

  CanvasPath(nsISupports* aParent,

             already_AddRefed<gfx::PathBuilder> aPathBuilder);

  void AddPath(CanvasPath& aCanvasPath,

               const Optional<NonNull<SVGMatrix>>& aMatrix);

private:

  virtual ~CanvasPath() {}

  nsCOMPtr<nsISupports> mParent;

  static gfx::Float ToFloat(double aValue) { return gfx::Float(aValue); }

  mutable RefPtr<gfx::Path> mPath;

  mutable RefPtr<gfx::PathBuilder> mPathBuilder;

  void EnsurePathBuilder() const;

};

} // namespace dom

} // namespace mozilla

#endif /* CanvasPath_h */