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a47006fa39
DOM's initEvent says that it must do nothing during dispatch. UI Events says they behave the same as initEvent, so the legacy initializers defined there also shouldn't do anything during dispatch. Previously we only did this for initEvent itself, but other legacy initializers would function normally during dispatch. Edge passes the wpt test that's updated in this commit. Chrome passes all but initCustomEvent. It would be nice to expand the test to have coverage for all our legacy initializers, but the likelihood of real-world compat issues from this behavior is slim enough that I didn't think it was worth the effort. MozReview-Commit-ID: IYLOuwlPGSj
135 lines
4.5 KiB
C++
135 lines
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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nsGlobalWindow* 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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