зеркало из https://github.com/mozilla/gecko-dev.git
99 строки
3.5 KiB
C++
99 строки
3.5 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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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 "nsDOMDragEvent.h"
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#include "nsContentUtils.h"
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#include "nsIDOMDataTransfer.h"
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#include "prtime.h"
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#include "mozilla/MouseEvents.h"
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using namespace mozilla;
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nsDOMDragEvent::nsDOMDragEvent(mozilla::dom::EventTarget* aOwner,
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nsPresContext* aPresContext,
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WidgetDragEvent* aEvent)
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: nsDOMMouseEvent(aOwner, aPresContext, aEvent ? aEvent :
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new WidgetDragEvent(false, 0, 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->time = PR_Now();
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mEvent->refPoint.x = mEvent->refPoint.y = 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(nsDOMDragEvent, nsDOMMouseEvent)
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NS_IMPL_RELEASE_INHERITED(nsDOMDragEvent, nsDOMMouseEvent)
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NS_INTERFACE_MAP_BEGIN(nsDOMDragEvent)
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NS_INTERFACE_MAP_ENTRY(nsIDOMDragEvent)
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NS_INTERFACE_MAP_END_INHERITING(nsDOMMouseEvent)
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NS_IMETHODIMP
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nsDOMDragEvent::InitDragEvent(const nsAString & aType,
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bool aCanBubble, bool aCancelable,
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nsIDOMWindow* aView, int32_t aDetail,
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int32_t aScreenX, int32_t aScreenY,
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int32_t aClientX, int32_t aClientY,
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bool aCtrlKey, bool aAltKey, bool aShiftKey,
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bool aMetaKey, uint16_t aButton,
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nsIDOMEventTarget *aRelatedTarget,
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nsIDOMDataTransfer* aDataTransfer)
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{
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nsresult rv = nsDOMMouseEvent::InitMouseEvent(aType, aCanBubble, aCancelable,
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aView, aDetail, aScreenX, aScreenY, aClientX, aClientY,
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aCtrlKey, aAltKey, aShiftKey, aMetaKey, aButton,
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aRelatedTarget);
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NS_ENSURE_SUCCESS(rv, rv);
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if (mEventIsInternal && mEvent) {
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mEvent->AsDragEvent()->dataTransfer = aDataTransfer;
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}
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return NS_OK;
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}
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NS_IMETHODIMP
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nsDOMDragEvent::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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nsIDOMDataTransfer*
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nsDOMDragEvent::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->eventStructType != NS_DRAG_EVENT) {
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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->dataTransfer;
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}
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nsresult NS_NewDOMDragEvent(nsIDOMEvent** aInstancePtrResult,
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mozilla::dom::EventTarget* aOwner,
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nsPresContext* aPresContext,
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WidgetDragEvent* aEvent)
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{
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nsDOMDragEvent* event = new nsDOMDragEvent(aOwner, aPresContext, aEvent);
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return CallQueryInterface(event, aInstancePtrResult);
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}
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