/* -*- 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_dom_Touch_h_

#define mozilla_dom_Touch_h_

#include "mozilla/Attributes.h"

#include "mozilla/EventForwards.h"

#include "mozilla/MouseEvents.h"

#include "mozilla/dom/BindingDeclarations.h"

#include "mozilla/dom/TouchBinding.h"

#include "nsWrapperCache.h"

#include "Units.h"

class nsPresContext;

namespace mozilla {

namespace dom {

class EventTarget;

class Touch final : public nsISupports

                  , public nsWrapperCache

                  , public WidgetPointerHelper

{

public:

  static bool PrefEnabled(JSContext* aCx, JSObject* aGlobal);

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

                                             const TouchInit& aParam,

                                             ErrorResult& aRv);

  Touch(EventTarget* aTarget,

        int32_t aIdentifier,

        int32_t aPageX,

        int32_t aPageY,

        int32_t aScreenX,

        int32_t aScreenY,

        int32_t aClientX,

        int32_t aClientY,

        int32_t aRadiusX,

        int32_t aRadiusY,

        float aRotationAngle,

        float aForce);

  Touch(int32_t aIdentifier,

        LayoutDeviceIntPoint aPoint,

        LayoutDeviceIntPoint aRadius,

        float aRotationAngle,

        float aForce);

  Touch(const Touch& aOther);

  NS_DECL_CYCLE_COLLECTING_ISUPPORTS

  NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_CLASS(Touch)

  void InitializePoints(nsPresContext* aPresContext, WidgetEvent* aEvent);

  // Note, this sets both mOriginalTarget and mTarget.

  void SetTouchTarget(EventTarget* aTarget);

  bool Equals(Touch* aTouch);

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

  nsIGlobalObject* GetParentObject();

  // WebIDL

  int32_t Identifier() const { return mIdentifier; }

  EventTarget* GetTarget() const;

  int32_t ScreenX(CallerType aCallerType) const;

  int32_t ScreenY(CallerType aCallerType) const;

  int32_t ClientX() const { return mClientPoint.x; }

  int32_t ClientY() const { return mClientPoint.y; }

  int32_t PageX() const { return mPagePoint.x; }

  int32_t PageY() const { return mPagePoint.y; }

  int32_t RadiusX(CallerType aCallerType) const;

  int32_t RadiusY(CallerType aCallerType) const;

  float RotationAngle(CallerType aCallerType) const;

  float Force(CallerType aCallerType) const;

  nsCOMPtr<EventTarget> mOriginalTarget;

  nsCOMPtr<EventTarget> mTarget;

  LayoutDeviceIntPoint mRefPoint;

  bool mChanged;

  // Is this touch instance being suppressed to dispatch touch event to content.

  // We can't remove touch instance from WidgetTouchEvent::mTouches because we

  // still need it when dispatching pointer events.

  bool mIsTouchEventSuppressed;

  uint32_t mMessage;

  int32_t mIdentifier;

  CSSIntPoint mPagePoint;

  CSSIntPoint mClientPoint;

  CSSIntPoint mScreenPoint;

  LayoutDeviceIntPoint mRadius;

  float mRotationAngle;

  float mForce;

protected:

  ~Touch();

  bool mPointsInitialized;

};

} // namespace dom

} // namespace mozilla

#endif // mozilla_dom_Touch_h_