зеркало из https://github.com/mozilla/gecko-dev.git
135 строки
4.5 KiB
C++
135 строки
4.5 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
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "mozilla/dom/DragEvent.h"
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#include "mozilla/MouseEvents.h"
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#include "nsContentUtils.h"
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#include "prtime.h"
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namespace mozilla {
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namespace dom {
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DragEvent::DragEvent(EventTarget* aOwner,
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nsPresContext* aPresContext,
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WidgetDragEvent* aEvent)
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: MouseEvent(aOwner, aPresContext,
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aEvent ? aEvent :
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new WidgetDragEvent(false, eVoidEvent, nullptr))
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{
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if (aEvent) {
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mEventIsInternal = false;
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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->AsMouseEvent()->inputSource = nsIDOMMouseEvent::MOZ_SOURCE_UNKNOWN;
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}
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}
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NS_IMPL_ADDREF_INHERITED(DragEvent, MouseEvent)
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NS_IMPL_RELEASE_INHERITED(DragEvent, MouseEvent)
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NS_INTERFACE_MAP_BEGIN(DragEvent)
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NS_INTERFACE_MAP_ENTRY(nsIDOMDragEvent)
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NS_INTERFACE_MAP_END_INHERITING(MouseEvent)
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void
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DragEvent::InitDragEvent(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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bool aCtrlKey,
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bool aAltKey,
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bool aShiftKey,
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bool aMetaKey,
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uint16_t aButton,
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EventTarget* aRelatedTarget,
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DataTransfer* aDataTransfer)
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{
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NS_ENSURE_TRUE_VOID(!mEvent->mFlags.mIsBeingDispatched);
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MouseEvent::InitMouseEvent(aType, aCanBubble, aCancelable,
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aView, aDetail, aScreenX, aScreenY,
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aClientX, aClientY, aCtrlKey, aAltKey,
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aShiftKey, aMetaKey, aButton, aRelatedTarget);
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if (mEventIsInternal) {
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mEvent->AsDragEvent()->mDataTransfer = aDataTransfer;
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}
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}
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NS_IMETHODIMP
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DragEvent::GetDataTransfer(nsIDOMDataTransfer** aDataTransfer)
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{
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NS_IF_ADDREF(*aDataTransfer = GetDataTransfer());
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return NS_OK;
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}
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DataTransfer*
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DragEvent::GetDataTransfer()
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{
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// the dataTransfer field of the event caches the DataTransfer associated
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// with the drag. It is initialized when an attempt is made to retrieve it
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// rather that when the event is created to avoid duplicating the data when
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// no listener ever uses it.
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if (!mEvent || mEvent->mClass != eDragEventClass) {
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NS_WARNING("Tried to get dataTransfer from non-drag event!");
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return nullptr;
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}
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WidgetDragEvent* dragEvent = mEvent->AsDragEvent();
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// for synthetic events, just use the supplied data transfer object even if null
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if (!mEventIsInternal) {
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nsresult rv = nsContentUtils::SetDataTransferInEvent(dragEvent);
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NS_ENSURE_SUCCESS(rv, nullptr);
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}
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return dragEvent->mDataTransfer;
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}
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// static
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already_AddRefed<DragEvent>
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DragEvent::Constructor(const GlobalObject& aGlobal,
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const nsAString& aType,
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const DragEventInit& 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<DragEvent> e = new DragEvent(t, nullptr, nullptr);
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bool trusted = e->Init(t);
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e->InitDragEvent(aType, aParam.mBubbles, aParam.mCancelable,
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aParam.mView, aParam.mDetail, aParam.mScreenX,
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aParam.mScreenY, aParam.mClientX, aParam.mClientY,
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aParam.mCtrlKey, aParam.mAltKey, aParam.mShiftKey,
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aParam.mMetaKey, aParam.mButton, aParam.mRelatedTarget,
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aParam.mDataTransfer);
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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<DragEvent>
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NS_NewDOMDragEvent(EventTarget* aOwner,
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nsPresContext* aPresContext,
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WidgetDragEvent* aEvent)
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{
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RefPtr<DragEvent> event =
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new DragEvent(aOwner, aPresContext, aEvent);
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return event.forget();
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}
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