dom/events/Touch.h

   1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
   3 /* This Source Code Form is subject to the terms of the Mozilla Public
   4  * License, v. 2.0. If a copy of the MPL was not distributed with this
   5  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   6
   7 #ifndef mozilla_dom_Touch_h_
   8 #define mozilla_dom_Touch_h_
   9
  10 #include "mozilla/Attributes.h"
  11 #include "mozilla/EventForwards.h"
  12 #include "mozilla/MouseEvents.h"
  13 #include "mozilla/dom/BindingDeclarations.h"
  14 #include "mozilla/dom/TouchBinding.h"
  15 #include "nsWrapperCache.h"
  16 #include "Units.h"
  17
  18 class nsPresContext;
  19
  20 namespace mozilla::dom {
  21
  22 class EventTarget;
  23
  24 class Touch final : public nsISupports,
  25                     public nsWrapperCache,
  26                     public WidgetPointerHelper {
  27  public:
  28   static bool PrefEnabled(JSContext* aCx, JSObject* aGlobal);
  29
  30   static already_AddRefed<Touch> Constructor(const GlobalObject& aGlobal,
  31                                              const TouchInit& aParam);
  32
  33   Touch(EventTarget* aTarget, int32_t aIdentifier, int32_t aPageX,
  34         int32_t aPageY, int32_t aScreenX, int32_t aScreenY, int32_t aClientX,
  35         int32_t aClientY, int32_t aRadiusX, int32_t aRadiusY,
  36         float aRotationAngle, float aForce);
  37   Touch(int32_t aIdentifier, LayoutDeviceIntPoint aPoint,
  38         LayoutDeviceIntPoint aRadius, float aRotationAngle, float aForce);
  39   Touch(const Touch& aOther);
  40
  41   NS_DECL_CYCLE_COLLECTING_ISUPPORTS
  42   NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_CLASS(Touch)
  43
  44   void InitializePoints(nsPresContext* aPresContext, WidgetEvent* aEvent);
  45
  46   // Note, this sets both mOriginalTarget and mTarget.
  47   void SetTouchTarget(EventTarget* aTarget);
  48
  49   bool Equals(Touch* aTouch) const;
  50
  51   // Update this touch's touch area to be the same as aTouch
  52   void SetSameAs(const Touch* aTouch);
  53
  54   virtual JSObject* WrapObject(JSContext* aCx,
  55                                JS::Handle<JSObject*> aGivenProto) override;
  56
  57   nsIGlobalObject* GetParentObject();
  58
  59   // WebIDL
  60   int32_t Identifier() const { return mIdentifier; }
  61   EventTarget* GetTarget() const;
  62   int32_t ScreenX(CallerType aCallerType) const;
  63   int32_t ScreenY(CallerType aCallerType) const;
  64   int32_t ClientX() const { return mClientPoint.x; }
  65   int32_t ClientY() const { return mClientPoint.y; }
  66   int32_t PageX() const { return mPagePoint.x; }
  67   int32_t PageY() const { return mPagePoint.y; }
  68   int32_t RadiusX(CallerType aCallerType) const;
  69   int32_t RadiusY(CallerType aCallerType) const;
  70   float RotationAngle(CallerType aCallerType) const;
  71   float Force(CallerType aCallerType) const;
  72
  73   nsCOMPtr<EventTarget> mOriginalTarget;
  74   nsCOMPtr<EventTarget> mTarget;
  75   LayoutDeviceIntPoint mRefPoint;
  76   bool mChanged;
  77
  78   // Is this touch instance being suppressed to dispatch touch event to content.
  79   // We can't remove touch instance from WidgetTouchEvent::mTouches because we
  80   // still need it when dispatching pointer events.
  81   bool mIsTouchEventSuppressed;
  82
  83   uint32_t mMessage;
  84   int32_t mIdentifier;
  85   CSSIntPoint mPagePoint;
  86   CSSIntPoint mClientPoint;
  87   CSSIntPoint mScreenPoint;
  88   LayoutDeviceIntPoint mRadius;
  89   float mRotationAngle;
  90   float mForce;
  91
  92  protected:
  93   ~Touch();
  94
  95   bool mPointsInitialized;
  96 };
  97
  98 }  // namespace mozilla::dom
  99
 100 #endif  // mozilla_dom_Touch_h_