gecko-dev/dom/events/ClipboardEvent.cpp
Aryeh Gregor a47006fa39 Bug 1313943 - Legacy event initializers should all do nothing during dispatch; r=bkelly
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
2016-11-01 17:19:59 +02:00

135 lines
4.2 KiB
C++

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* 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/ClipboardEvent.h"
#include "mozilla/ContentEvents.h"
#include "mozilla/dom/DataTransfer.h"
#include "nsIClipboard.h"
namespace mozilla {
namespace dom {
ClipboardEvent::ClipboardEvent(EventTarget* aOwner,
nsPresContext* aPresContext,
InternalClipboardEvent* aEvent)
: Event(aOwner, aPresContext,
aEvent ? aEvent : new InternalClipboardEvent(false, eVoidEvent))
{
if (aEvent) {
mEventIsInternal = false;
} else {
mEventIsInternal = true;
mEvent->mTime = PR_Now();
}
}
NS_INTERFACE_MAP_BEGIN(ClipboardEvent)
NS_INTERFACE_MAP_ENTRY(nsIDOMClipboardEvent)
NS_INTERFACE_MAP_END_INHERITING(Event)
NS_IMPL_ADDREF_INHERITED(ClipboardEvent, Event)
NS_IMPL_RELEASE_INHERITED(ClipboardEvent, Event)
nsresult
ClipboardEvent::InitClipboardEvent(const nsAString& aType,
bool aCanBubble,
bool aCancelable,
nsIDOMDataTransfer* aClipboardData)
{
nsCOMPtr<DataTransfer> clipboardData = do_QueryInterface(aClipboardData);
// Null clipboardData is OK
ErrorResult rv;
InitClipboardEvent(aType, aCanBubble, aCancelable, clipboardData);
return rv.StealNSResult();
}
void
ClipboardEvent::InitClipboardEvent(const nsAString& aType, bool aCanBubble,
bool aCancelable,
DataTransfer* aClipboardData)
{
NS_ENSURE_TRUE_VOID(!mEvent->mFlags.mIsBeingDispatched);
Event::InitEvent(aType, aCanBubble, aCancelable);
mEvent->AsClipboardEvent()->mClipboardData = aClipboardData;
}
already_AddRefed<ClipboardEvent>
ClipboardEvent::Constructor(const GlobalObject& aGlobal,
const nsAString& aType,
const ClipboardEventInit& aParam,
ErrorResult& aRv)
{
nsCOMPtr<EventTarget> t = do_QueryInterface(aGlobal.GetAsSupports());
RefPtr<ClipboardEvent> e = new ClipboardEvent(t, nullptr, nullptr);
bool trusted = e->Init(t);
RefPtr<DataTransfer> clipboardData;
if (e->mEventIsInternal) {
InternalClipboardEvent* event = e->mEvent->AsClipboardEvent();
if (event) {
// Always create a clipboardData for the copy event. If this is changed to
// support other types of events, make sure that read/write privileges are
// checked properly within DataTransfer.
clipboardData = new DataTransfer(ToSupports(e), eCopy, false, -1);
clipboardData->SetData(aParam.mDataType, aParam.mData,
*aGlobal.GetSubjectPrincipal(), aRv);
NS_ENSURE_TRUE(!aRv.Failed(), nullptr);
}
}
e->InitClipboardEvent(aType, aParam.mBubbles, aParam.mCancelable,
clipboardData);
e->SetTrusted(trusted);
e->SetComposed(aParam.mComposed);
return e.forget();
}
NS_IMETHODIMP
ClipboardEvent::GetClipboardData(nsIDOMDataTransfer** aClipboardData)
{
NS_IF_ADDREF(*aClipboardData = GetClipboardData());
return NS_OK;
}
DataTransfer*
ClipboardEvent::GetClipboardData()
{
InternalClipboardEvent* event = mEvent->AsClipboardEvent();
if (!event->mClipboardData) {
if (mEventIsInternal) {
event->mClipboardData =
new DataTransfer(ToSupports(this), eCopy, false, -1);
} else {
event->mClipboardData =
new DataTransfer(ToSupports(this), event->mMessage,
event->mMessage == ePaste,
nsIClipboard::kGlobalClipboard);
}
}
return event->mClipboardData;
}
} // namespace dom
} // namespace mozilla
using namespace mozilla;
using namespace mozilla::dom;
already_AddRefed<ClipboardEvent>
NS_NewDOMClipboardEvent(EventTarget* aOwner,
nsPresContext* aPresContext,
InternalClipboardEvent* aEvent)
{
RefPtr<ClipboardEvent> it =
new ClipboardEvent(aOwner, aPresContext, aEvent);
return it.forget();
}