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(int32_t aIdentifier, LayoutDeviceIntPoint aPoint,
  40         LayoutDeviceIntPoint aRadius, float aRotationAngle, float aForce,
  41         int32_t aTiltX, int32_t aTiltY, int32_t aTwist);
  42   Touch(const Touch& aOther);
  43
  44   NS_DECL_CYCLE_COLLECTING_ISUPPORTS
  45   NS_DECL_CYCLE_COLLECTION_WRAPPERCACHE_CLASS(Touch)
  46
  47   void InitializePoints(nsPresContext* aPresContext, WidgetEvent* aEvent);
  48
  49   // Note, this sets both mOriginalTarget and mTarget.
  50   void SetTouchTarget(EventTarget* aTarget);
  51
  52   bool Equals(Touch* aTouch) const;
  53
  54   // Update this touch's touch area to be the same as aTouch
  55   void SetSameAs(const Touch* aTouch);
  56
  57   virtual JSObject* WrapObject(JSContext* aCx,
  58                                JS::Handle<JSObject*> aGivenProto) override;
  59
  60   nsIGlobalObject* GetParentObject() const;
  61
  62   // WebIDL
  63   int32_t Identifier() const { return mIdentifier; }
  64   EventTarget* GetTarget() const;
  65   int32_t ScreenX(CallerType aCallerType) const;
  66   int32_t ScreenY(CallerType aCallerType) const;
  67   int32_t ClientX() const { return mClientPoint.x; }
  68   int32_t ClientY() const { return mClientPoint.y; }
  69   int32_t PageX() const { return mPagePoint.x; }
  70   int32_t PageY() const { return mPagePoint.y; }
  71   int32_t RadiusX(CallerType aCallerType) const;
  72   int32_t RadiusY(CallerType aCallerType) const;
  73   float RotationAngle(CallerType aCallerType) const;
  74   float Force(CallerType aCallerType) const;
  75
  76   EventTarget* GetOriginalTarget() const;
  77
  78   nsCOMPtr<EventTarget> mOriginalTarget;
  79   nsCOMPtr<EventTarget> mTarget;
  80   LayoutDeviceIntPoint mRefPoint;
  81   bool mChanged;
  82
  83   // Is this touch instance being suppressed to dispatch touch event to content.
  84   // We can't remove touch instance from WidgetTouchEvent::mTouches because we
  85   // still need it when dispatching pointer events.
  86   bool mIsTouchEventSuppressed;
  87
  88   uint32_t mMessage;
  89   int32_t mIdentifier;
  90   CSSIntPoint mPagePoint;
  91   CSSIntPoint mClientPoint;
  92   CSSIntPoint mScreenPoint;
  93   LayoutDeviceIntPoint mRadius;
  94   float mRotationAngle;
  95   float mForce;
  96
  97  protected:
  98   ~Touch();
  99
 100   bool mPointsInitialized;
 101 };
 102
 103 }  // namespace mozilla::dom
 104
 105 #endif  // mozilla_dom_Touch_h_