/* -*- 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_DOMRECT_H_

#define MOZILLA_DOMRECT_H_

#include "nsTArray.h"

#include "nsCOMPtr.h"

#include "nsWrapperCache.h"

#include "nsCycleCollectionParticipant.h"

#include "mozilla/Attributes.h"

#include "mozilla/dom/BindingDeclarations.h"

#include "mozilla/ErrorResult.h"

#include <algorithm>

struct nsRect;

namespace mozilla {

namespace dom {

class DOMRectReadOnly : public nsISupports

                      , public nsWrapperCache

{

protected:

  virtual ~DOMRectReadOnly() {}

public:

  NS_DECL_CYCLE_COLLECTING_ISUPPORTS

  NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_CLASS(DOMRectReadOnly)

  explicit DOMRectReadOnly(nsISupports* aParent, double aX = 0, double aY = 0,

                           double aWidth = 0, double aHeight = 0)

    : mParent(aParent)

    , mX(aX)

    , mY(aY)

    , mWidth(aWidth)

    , mHeight(aHeight)

  {

  }

  nsISupports* GetParentObject() const

  {

    MOZ_ASSERT(mParent);

    return mParent;

  }

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

  static already_AddRefed<DOMRectReadOnly>

  Constructor(const GlobalObject& aGlobal, double aX, double aY,

              double aWidth, double aHeight, ErrorResult& aRv);

  double X() const

  {

    return mX;

  }

  double Y() const

  {

    return mY;

  }

  double Width() const

  {

    return mWidth;

  }

  double Height() const

  {

    return mHeight;

  }

  double Left() const

  {

    double x = X(), w = Width();

    return std::min(x, x + w);

  }

  double Top() const

  {

    double y = Y(), h = Height();

    return std::min(y, y + h);

  }

  double Right() const

  {

    double x = X(), w = Width();

    return std::max(x, x + w);

  }

  double Bottom() const

  {

    double y = Y(), h = Height();

    return std::max(y, y + h);

  }

protected:

  nsCOMPtr<nsISupports> mParent;

  double mX, mY, mWidth, mHeight;

};

class DOMRect final : public DOMRectReadOnly

{

public:

  explicit DOMRect(nsISupports* aParent, double aX = 0, double aY = 0,

                   double aWidth = 0, double aHeight = 0)

    : DOMRectReadOnly(aParent, aX, aY, aWidth, aHeight)

  {

  }

  NS_INLINE_DECL_REFCOUNTING_INHERITED(DOMRect, DOMRectReadOnly)

  static already_AddRefed<DOMRect>

  Constructor(const GlobalObject& aGlobal, double aX, double aY,

              double aWidth, double aHeight, ErrorResult& aRv);

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

  void SetRect(float aX, float aY, float aWidth, float aHeight) {

    mX = aX; mY = aY; mWidth = aWidth; mHeight = aHeight;

  }

  void SetLayoutRect(const nsRect& aLayoutRect);

  void SetX(double aX)

  {

    mX = aX;

  }

  void SetY(double aY)

  {

    mY = aY;

  }

  void SetWidth(double aWidth)

  {

    mWidth = aWidth;

  }

  void SetHeight(double aHeight)

  {

    mHeight = aHeight;

  }

  static DOMRect* FromSupports(nsISupports* aSupports)

  {

    return static_cast<DOMRect*>(aSupports);

  }

private:

  ~DOMRect() {}

};

class DOMRectList final : public nsISupports,

                          public nsWrapperCache

{

  ~DOMRectList() {}

public:

  explicit DOMRectList(nsISupports *aParent) : mParent(aParent)

  {

  }

  NS_DECL_CYCLE_COLLECTING_ISUPPORTS

  NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_CLASS(DOMRectList)

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

  nsISupports* GetParentObject()

  {

    return mParent;

  }

  void Append(DOMRect* aElement) { mArray.AppendElement(aElement); }

  uint32_t Length()

  {

    return mArray.Length();

  }

  DOMRect* Item(uint32_t aIndex)

  {

    return mArray.SafeElementAt(aIndex);

  }

  DOMRect* IndexedGetter(uint32_t aIndex, bool& aFound)

  {

    aFound = aIndex < mArray.Length();

    if (!aFound) {

      return nullptr;

    }

    return mArray[aIndex];

  }

protected:

  nsTArray<RefPtr<DOMRect> > mArray;

  nsCOMPtr<nsISupports> mParent;

};

} // namespace dom

} // namespace mozilla

#endif /*MOZILLA_DOMRECT_H_*/