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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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/. */
#include "mozilla/dom/WheelEvent.h"
#include "mozilla/MouseEvents.h"
#include "prtime.h"
namespace mozilla {
namespace dom {
WheelEvent::WheelEvent(EventTarget* aOwner,
nsPresContext* aPresContext,
WidgetWheelEvent* aWheelEvent)
: MouseEvent(aOwner, aPresContext,
aWheelEvent ? aWheelEvent :
new WidgetWheelEvent(false, eVoidEvent, nullptr))
, mAppUnitsPerDevPixel(0)
{
if (aWheelEvent) {
mEventIsInternal = false;
// If the delta mode is pixel, the WidgetWheelEvent's delta values are in
// device pixels. However, JS contents need the delta values in CSS pixels.
// We should store the value of mAppUnitsPerDevPixel here because
// it might be changed by changing zoom or something.
if (aWheelEvent->mDeltaMode == nsIDOMWheelEvent::DOM_DELTA_PIXEL) {
mAppUnitsPerDevPixel = aPresContext->AppUnitsPerDevPixel();
}
} else {
mEventIsInternal = true;
mEvent->mTime = PR_Now();
mEvent->mRefPoint = LayoutDeviceIntPoint(0, 0);
mEvent->AsWheelEvent()->inputSource = nsIDOMMouseEvent::MOZ_SOURCE_UNKNOWN;
}
}
NS_IMPL_ADDREF_INHERITED(WheelEvent, MouseEvent)
NS_IMPL_RELEASE_INHERITED(WheelEvent, MouseEvent)
NS_INTERFACE_MAP_BEGIN(WheelEvent)
NS_INTERFACE_MAP_END_INHERITING(MouseEvent)
void
WheelEvent::InitWheelEvent(const nsAString& aType,
bool aCanBubble,
bool aCancelable,
nsGlobalWindow* aView,
int32_t aDetail,
int32_t aScreenX,
int32_t aScreenY,
int32_t aClientX,
int32_t aClientY,
uint16_t aButton,
EventTarget* aRelatedTarget,
const nsAString& aModifiersList,
double aDeltaX,
double aDeltaY,
double aDeltaZ,
uint32_t aDeltaMode)
{
NS_ENSURE_TRUE_VOID(!mEvent->mFlags.mIsBeingDispatched);
MouseEvent::InitMouseEvent(aType, aCanBubble, aCancelable, aView, aDetail,
aScreenX, aScreenY, aClientX, aClientY, aButton,
aRelatedTarget, aModifiersList);
WidgetWheelEvent* wheelEvent = mEvent->AsWheelEvent();
wheelEvent->mDeltaX = aDeltaX;
wheelEvent->mDeltaY = aDeltaY;
wheelEvent->mDeltaZ = aDeltaZ;
wheelEvent->mDeltaMode = aDeltaMode;
}
double
WheelEvent::DeltaX()
{
if (!mAppUnitsPerDevPixel) {
return mEvent->AsWheelEvent()->mDeltaX;
}
return mEvent->AsWheelEvent()->mDeltaX *
mAppUnitsPerDevPixel / nsPresContext::AppUnitsPerCSSPixel();
}
double
WheelEvent::DeltaY()
{
if (!mAppUnitsPerDevPixel) {
return mEvent->AsWheelEvent()->mDeltaY;
}
return mEvent->AsWheelEvent()->mDeltaY *
mAppUnitsPerDevPixel / nsPresContext::AppUnitsPerCSSPixel();
}
double
WheelEvent::DeltaZ()
{
if (!mAppUnitsPerDevPixel) {
return mEvent->AsWheelEvent()->mDeltaZ;
}
return mEvent->AsWheelEvent()->mDeltaZ *
mAppUnitsPerDevPixel / nsPresContext::AppUnitsPerCSSPixel();
}
uint32_t
WheelEvent::DeltaMode()
{
return mEvent->AsWheelEvent()->mDeltaMode;
}
already_AddRefed<WheelEvent>
WheelEvent::Constructor(const GlobalObject& aGlobal,
const nsAString& aType,
const WheelEventInit& aParam,
ErrorResult& aRv)
{
nsCOMPtr<EventTarget> t = do_QueryInterface(aGlobal.GetAsSupports());
RefPtr<WheelEvent> e = new WheelEvent(t, nullptr, nullptr);
bool trusted = e->Init(t);
e->InitWheelEvent(aType, aParam.mBubbles, aParam.mCancelable,
aParam.mView, aParam.mDetail,
aParam.mScreenX, aParam.mScreenY,
aParam.mClientX, aParam.mClientY,
aParam.mButton, aParam.mRelatedTarget,
EmptyString(), aParam.mDeltaX,
aParam.mDeltaY, aParam.mDeltaZ, aParam.mDeltaMode);
e->InitializeExtraMouseEventDictionaryMembers(aParam);
e->SetTrusted(trusted);
e->SetComposed(aParam.mComposed);
return e.forget();
}
} // namespace dom
} // namespace mozilla
using namespace mozilla;
using namespace mozilla::dom;
already_AddRefed<WheelEvent>
NS_NewDOMWheelEvent(EventTarget* aOwner,
nsPresContext* aPresContext,
WidgetWheelEvent* aEvent)
{
RefPtr<WheelEvent> it = new WheelEvent(aOwner, aPresContext, aEvent);
return it.forget();
}
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