michael@0: /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
michael@0: /* vim: set ts=2 et sw=2 tw=80: */
michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this file,
michael@0:  * You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: #include "mozilla/dom/WheelEvent.h"
michael@0: #include "mozilla/MouseEvents.h"
michael@0: #include "prtime.h"
michael@0: 
michael@0: namespace mozilla {
michael@0: namespace dom {
michael@0: 
michael@0: WheelEvent::WheelEvent(EventTarget* aOwner,
michael@0:                        nsPresContext* aPresContext,
michael@0:                        WidgetWheelEvent* aWheelEvent)
michael@0:   : MouseEvent(aOwner, aPresContext,
michael@0:                aWheelEvent ? aWheelEvent :
michael@0:                              new WidgetWheelEvent(false, 0, nullptr))
michael@0:   , mAppUnitsPerDevPixel(0)
michael@0: {
michael@0:   if (aWheelEvent) {
michael@0:     mEventIsInternal = false;
michael@0:     // If the delta mode is pixel, the WidgetWheelEvent's delta values are in
michael@0:     // device pixels.  However, JS contents need the delta values in CSS pixels.
michael@0:     // We should store the value of mAppUnitsPerDevPixel here because
michael@0:     // it might be changed by changing zoom or something.
michael@0:     if (aWheelEvent->deltaMode == nsIDOMWheelEvent::DOM_DELTA_PIXEL) {
michael@0:       mAppUnitsPerDevPixel = aPresContext->AppUnitsPerDevPixel();
michael@0:     }
michael@0:   } else {
michael@0:     mEventIsInternal = true;
michael@0:     mEvent->time = PR_Now();
michael@0:     mEvent->refPoint.x = mEvent->refPoint.y = 0;
michael@0:     mEvent->AsWheelEvent()->inputSource = nsIDOMMouseEvent::MOZ_SOURCE_UNKNOWN;
michael@0:   }
michael@0: }
michael@0: 
michael@0: NS_IMPL_ADDREF_INHERITED(WheelEvent, MouseEvent)
michael@0: NS_IMPL_RELEASE_INHERITED(WheelEvent, MouseEvent)
michael@0: 
michael@0: NS_INTERFACE_MAP_BEGIN(WheelEvent)
michael@0:   NS_INTERFACE_MAP_ENTRY(nsIDOMWheelEvent)
michael@0: NS_INTERFACE_MAP_END_INHERITING(MouseEvent)
michael@0: 
michael@0: NS_IMETHODIMP
michael@0: WheelEvent::InitWheelEvent(const nsAString& aType,
michael@0:                            bool aCanBubble,
michael@0:                            bool aCancelable,
michael@0:                            nsIDOMWindow* aView,
michael@0:                            int32_t aDetail,
michael@0:                            int32_t aScreenX,
michael@0:                            int32_t aScreenY,
michael@0:                            int32_t aClientX,
michael@0:                            int32_t aClientY, 
michael@0:                            uint16_t aButton,
michael@0:                            nsIDOMEventTarget* aRelatedTarget,
michael@0:                            const nsAString& aModifiersList,
michael@0:                            double aDeltaX,
michael@0:                            double aDeltaY,
michael@0:                            double aDeltaZ,
michael@0:                            uint32_t aDeltaMode)
michael@0: {
michael@0:   nsresult rv =
michael@0:     MouseEvent::InitMouseEvent(aType, aCanBubble, aCancelable, aView, aDetail,
michael@0:                                aScreenX, aScreenY, aClientX, aClientY, aButton,
michael@0:                                aRelatedTarget, aModifiersList);
michael@0:   NS_ENSURE_SUCCESS(rv, rv);
michael@0: 
michael@0:   WidgetWheelEvent* wheelEvent = mEvent->AsWheelEvent();
michael@0:   wheelEvent->deltaX = aDeltaX;
michael@0:   wheelEvent->deltaY = aDeltaY;
michael@0:   wheelEvent->deltaZ = aDeltaZ;
michael@0:   wheelEvent->deltaMode = aDeltaMode;
michael@0: 
michael@0:   return NS_OK;
michael@0: }
michael@0: 
michael@0: double
michael@0: WheelEvent::DeltaX()
michael@0: {
michael@0:   if (!mAppUnitsPerDevPixel) {
michael@0:     return mEvent->AsWheelEvent()->deltaX;
michael@0:   }
michael@0:   return mEvent->AsWheelEvent()->deltaX *
michael@0:     mAppUnitsPerDevPixel / nsPresContext::AppUnitsPerCSSPixel();
michael@0: }
michael@0: 
michael@0: NS_IMETHODIMP
michael@0: WheelEvent::GetDeltaX(double* aDeltaX)
michael@0: {
michael@0:   NS_ENSURE_ARG_POINTER(aDeltaX);
michael@0: 
michael@0:   *aDeltaX = DeltaX();
michael@0:   return NS_OK;
michael@0: }
michael@0: 
michael@0: double
michael@0: WheelEvent::DeltaY()
michael@0: {
michael@0:   if (!mAppUnitsPerDevPixel) {
michael@0:     return mEvent->AsWheelEvent()->deltaY;
michael@0:   }
michael@0:   return mEvent->AsWheelEvent()->deltaY *
michael@0:     mAppUnitsPerDevPixel / nsPresContext::AppUnitsPerCSSPixel();
michael@0: }
michael@0: 
michael@0: NS_IMETHODIMP
michael@0: WheelEvent::GetDeltaY(double* aDeltaY)
michael@0: {
michael@0:   NS_ENSURE_ARG_POINTER(aDeltaY);
michael@0: 
michael@0:   *aDeltaY = DeltaY();
michael@0:   return NS_OK;
michael@0: }
michael@0: 
michael@0: double
michael@0: WheelEvent::DeltaZ()
michael@0: {
michael@0:   if (!mAppUnitsPerDevPixel) {
michael@0:     return mEvent->AsWheelEvent()->deltaZ;
michael@0:   }
michael@0:   return mEvent->AsWheelEvent()->deltaZ *
michael@0:     mAppUnitsPerDevPixel / nsPresContext::AppUnitsPerCSSPixel();
michael@0: }
michael@0: 
michael@0: NS_IMETHODIMP
michael@0: WheelEvent::GetDeltaZ(double* aDeltaZ)
michael@0: {
michael@0:   NS_ENSURE_ARG_POINTER(aDeltaZ);
michael@0: 
michael@0:   *aDeltaZ = DeltaZ();
michael@0:   return NS_OK;
michael@0: }
michael@0: 
michael@0: uint32_t
michael@0: WheelEvent::DeltaMode()
michael@0: {
michael@0:   return mEvent->AsWheelEvent()->deltaMode;
michael@0: }
michael@0: 
michael@0: NS_IMETHODIMP
michael@0: WheelEvent::GetDeltaMode(uint32_t* aDeltaMode)
michael@0: {
michael@0:   NS_ENSURE_ARG_POINTER(aDeltaMode);
michael@0: 
michael@0:   *aDeltaMode = DeltaMode();
michael@0:   return NS_OK;
michael@0: }
michael@0: 
michael@0: static void
michael@0: GetModifierList(bool aCtrl, bool aShift, bool aAlt, bool aMeta,
michael@0:                 nsAString& aModifierList)
michael@0: {
michael@0:   if (aCtrl) {
michael@0:     aModifierList.AppendLiteral(NS_DOM_KEYNAME_CONTROL);
michael@0:   }
michael@0:   if (aShift) {
michael@0:     if (!aModifierList.IsEmpty()) {
michael@0:       aModifierList.AppendLiteral(" ");
michael@0:     }
michael@0:     aModifierList.AppendLiteral(NS_DOM_KEYNAME_SHIFT);
michael@0:   }
michael@0:   if (aAlt) {
michael@0:     if (!aModifierList.IsEmpty()) {
michael@0:       aModifierList.AppendLiteral(" ");
michael@0:     }
michael@0:     aModifierList.AppendLiteral(NS_DOM_KEYNAME_ALT);
michael@0:   }
michael@0:   if (aMeta) {
michael@0:     if (!aModifierList.IsEmpty()) {
michael@0:       aModifierList.AppendLiteral(" ");
michael@0:     }
michael@0:     aModifierList.AppendLiteral(NS_DOM_KEYNAME_META);
michael@0:   }
michael@0: }
michael@0: 
michael@0: already_AddRefed<WheelEvent>
michael@0: WheelEvent::Constructor(const GlobalObject& aGlobal,
michael@0:                         const nsAString& aType,
michael@0:                         const WheelEventInit& aParam,
michael@0:                         ErrorResult& aRv)
michael@0: {
michael@0:   nsCOMPtr<EventTarget> t = do_QueryInterface(aGlobal.GetAsSupports());
michael@0:   nsRefPtr<WheelEvent> e = new WheelEvent(t, nullptr, nullptr);
michael@0:   bool trusted = e->Init(t);
michael@0:   nsAutoString modifierList;
michael@0:   GetModifierList(aParam.mCtrlKey, aParam.mShiftKey,
michael@0:                   aParam.mAltKey, aParam.mMetaKey,
michael@0:                   modifierList);
michael@0:   aRv = e->InitWheelEvent(aType, aParam.mBubbles, aParam.mCancelable,
michael@0:                           aParam.mView, aParam.mDetail,
michael@0:                           aParam.mScreenX, aParam.mScreenY,
michael@0:                           aParam.mClientX, aParam.mClientY,
michael@0:                           aParam.mButton, aParam.mRelatedTarget,
michael@0:                           modifierList, aParam.mDeltaX,
michael@0:                           aParam.mDeltaY, aParam.mDeltaZ, aParam.mDeltaMode);
michael@0:   e->mEvent->AsWheelEvent()->buttons = aParam.mButtons;
michael@0:   e->SetTrusted(trusted);
michael@0:   return e.forget();
michael@0: }
michael@0: 
michael@0: } // namespace dom
michael@0: } // namespace mozilla
michael@0: 
michael@0: using namespace mozilla;
michael@0: using namespace mozilla::dom;
michael@0: 
michael@0: nsresult
michael@0: NS_NewDOMWheelEvent(nsIDOMEvent** aInstancePtrResult,
michael@0:                     EventTarget* aOwner,
michael@0:                     nsPresContext* aPresContext,
michael@0:                     WidgetWheelEvent* aEvent)
michael@0: {
michael@0:   WheelEvent* it = new WheelEvent(aOwner, aPresContext, aEvent);
michael@0:   NS_ADDREF(it);
michael@0:   *aInstancePtrResult = static_cast<Event*>(it);
michael@0:   return NS_OK;
michael@0: }