forked from mirrors/gecko-dev
141 lines
4.7 KiB
C++
141 lines
4.7 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this file,
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* You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "mozilla/dom/WheelEvent.h"
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#include "mozilla/MouseEvents.h"
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#include "prtime.h"
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namespace mozilla {
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namespace dom {
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WheelEvent::WheelEvent(EventTarget* aOwner,
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nsPresContext* aPresContext,
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WidgetWheelEvent* aWheelEvent)
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: MouseEvent(aOwner, aPresContext,
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aWheelEvent ? aWheelEvent :
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new WidgetWheelEvent(false, eVoidEvent, nullptr))
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, mAppUnitsPerDevPixel(0)
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{
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if (aWheelEvent) {
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mEventIsInternal = false;
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// If the delta mode is pixel, the WidgetWheelEvent's delta values are in
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// device pixels. However, JS contents need the delta values in CSS pixels.
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// We should store the value of mAppUnitsPerDevPixel here because
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// it might be changed by changing zoom or something.
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if (aWheelEvent->mDeltaMode == nsIDOMWheelEvent::DOM_DELTA_PIXEL) {
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mAppUnitsPerDevPixel = aPresContext->AppUnitsPerDevPixel();
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}
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} else {
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mEventIsInternal = true;
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mEvent->mTime = PR_Now();
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mEvent->mRefPoint = LayoutDeviceIntPoint(0, 0);
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mEvent->AsWheelEvent()->inputSource = nsIDOMMouseEvent::MOZ_SOURCE_UNKNOWN;
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}
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}
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void
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WheelEvent::InitWheelEvent(const nsAString& aType,
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bool aCanBubble,
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bool aCancelable,
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nsGlobalWindowInner* aView,
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int32_t aDetail,
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int32_t aScreenX,
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int32_t aScreenY,
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int32_t aClientX,
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int32_t aClientY,
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uint16_t aButton,
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EventTarget* aRelatedTarget,
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const nsAString& aModifiersList,
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double aDeltaX,
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double aDeltaY,
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double aDeltaZ,
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uint32_t aDeltaMode)
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{
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NS_ENSURE_TRUE_VOID(!mEvent->mFlags.mIsBeingDispatched);
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MouseEvent::InitMouseEvent(aType, aCanBubble, aCancelable, aView, aDetail,
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aScreenX, aScreenY, aClientX, aClientY, aButton,
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aRelatedTarget, aModifiersList);
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WidgetWheelEvent* wheelEvent = mEvent->AsWheelEvent();
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wheelEvent->mDeltaX = aDeltaX;
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wheelEvent->mDeltaY = aDeltaY;
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wheelEvent->mDeltaZ = aDeltaZ;
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wheelEvent->mDeltaMode = aDeltaMode;
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}
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double
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WheelEvent::DeltaX()
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{
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if (!mAppUnitsPerDevPixel) {
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return mEvent->AsWheelEvent()->mDeltaX;
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}
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return mEvent->AsWheelEvent()->mDeltaX *
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mAppUnitsPerDevPixel / nsPresContext::AppUnitsPerCSSPixel();
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}
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double
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WheelEvent::DeltaY()
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{
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if (!mAppUnitsPerDevPixel) {
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return mEvent->AsWheelEvent()->mDeltaY;
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}
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return mEvent->AsWheelEvent()->mDeltaY *
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mAppUnitsPerDevPixel / nsPresContext::AppUnitsPerCSSPixel();
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}
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double
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WheelEvent::DeltaZ()
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{
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if (!mAppUnitsPerDevPixel) {
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return mEvent->AsWheelEvent()->mDeltaZ;
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}
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return mEvent->AsWheelEvent()->mDeltaZ *
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mAppUnitsPerDevPixel / nsPresContext::AppUnitsPerCSSPixel();
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}
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uint32_t
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WheelEvent::DeltaMode()
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{
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return mEvent->AsWheelEvent()->mDeltaMode;
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}
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already_AddRefed<WheelEvent>
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WheelEvent::Constructor(const GlobalObject& aGlobal,
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const nsAString& aType,
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const WheelEventInit& aParam,
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ErrorResult& aRv)
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{
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nsCOMPtr<EventTarget> t = do_QueryInterface(aGlobal.GetAsSupports());
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RefPtr<WheelEvent> e = new WheelEvent(t, nullptr, nullptr);
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bool trusted = e->Init(t);
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e->InitWheelEvent(aType, aParam.mBubbles, aParam.mCancelable,
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aParam.mView, aParam.mDetail,
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aParam.mScreenX, aParam.mScreenY,
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aParam.mClientX, aParam.mClientY,
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aParam.mButton, aParam.mRelatedTarget,
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EmptyString(), aParam.mDeltaX,
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aParam.mDeltaY, aParam.mDeltaZ, aParam.mDeltaMode);
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e->InitializeExtraMouseEventDictionaryMembers(aParam);
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e->SetTrusted(trusted);
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e->SetComposed(aParam.mComposed);
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return e.forget();
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}
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} // namespace dom
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} // namespace mozilla
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using namespace mozilla;
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using namespace mozilla::dom;
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already_AddRefed<WheelEvent>
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NS_NewDOMWheelEvent(EventTarget* aOwner,
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nsPresContext* aPresContext,
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WidgetWheelEvent* aEvent)
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{
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RefPtr<WheelEvent> it = new WheelEvent(aOwner, aPresContext, aEvent);
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return it.forget();
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}
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