gecko-dev/dom/base/DOMQuad.h

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* 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 MOZILLA_DOMQUAD_H_
#define MOZILLA_DOMQUAD_H_

#include <cstdint>
#include "Units.h"
#include "js/TypeDecls.h"
#include "mozilla/AlreadyAddRefed.h"
#include "mozilla/Assertions.h"
#include "mozilla/RefPtr.h"
#include "nsCOMPtr.h"
#include "nsCycleCollectionParticipant.h"
#include "nsISupports.h"
#include "nsWrapperCache.h"

class JSObject;
class nsIGlobalObject;
struct JSContext;
struct JSStructuredCloneReader;
struct JSStructuredCloneWriter;

namespace mozilla::dom {

class DOMRectReadOnly;
class DOMPoint;
class GlobalObject;
struct DOMPointInit;
struct DOMQuadInit;
struct DOMRectInit;

class DOMQuad final : public nsWrapperCache {
  ~DOMQuad();

 public:
  DOMQuad(nsISupports* aParent, CSSPoint aPoints[4]);
  explicit DOMQuad(nsISupports* aParent);

  NS_INLINE_DECL_CYCLE_COLLECTING_NATIVE_REFCOUNTING(DOMQuad)
  NS_DECL_CYCLE_COLLECTION_NATIVE_WRAPPERCACHE_CLASS(DOMQuad)

  nsISupports* GetParentObject() const { return mParent; }
  virtual JSObject* WrapObject(JSContext* aCx,
                               JS::Handle<JSObject*> aGivenProto) override;

  static already_AddRefed<DOMQuad> FromRect(const GlobalObject& aGlobal,
                                            const DOMRectInit& aInit);

  static already_AddRefed<DOMQuad> FromQuad(const GlobalObject& aGlobal,
                                            const DOMQuadInit& aInit);

  static already_AddRefed<DOMQuad> Constructor(const GlobalObject& aGlobal,
                                               const DOMPointInit& aP1,
                                               const DOMPointInit& aP2,
                                               const DOMPointInit& aP3,
                                               const DOMPointInit& aP4);
  static already_AddRefed<DOMQuad> Constructor(const GlobalObject& aGlobal,
                                               const DOMRectReadOnly& aRect);

  already_AddRefed<DOMRectReadOnly> GetBounds() const;
  DOMPoint* P1() const { return mPoints[0]; }
  DOMPoint* P2() const { return mPoints[1]; }
  DOMPoint* P3() const { return mPoints[2]; }
  DOMPoint* P4() const { return mPoints[3]; }

  DOMPoint* Point(uint32_t aIndex) const { return mPoints[aIndex]; }

  bool WriteStructuredClone(JSContext* aCx,
                            JSStructuredCloneWriter* aWriter) const;

  static already_AddRefed<DOMQuad> ReadStructuredClone(
      JSContext* aCx, nsIGlobalObject* aGlobal,
      JSStructuredCloneReader* aReader);

 protected:
  void GetHorizontalMinMax(double* aX1, double* aX2) const;
  void GetVerticalMinMax(double* aY1, double* aY2) const;

  nsCOMPtr<nsISupports> mParent;
  RefPtr<DOMPoint> mPoints[4];
};

}  // namespace mozilla::dom

#endif /*MOZILLA_DOMRECT_H_*/