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/* -*- 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/AsyncEventDispatcher.h"
#include "mozilla/BasicEvents.h"
#include "mozilla/EventDispatcher.h"
#include "mozilla/dom/DocumentInlines.h"
#include "mozilla/dom/Event.h"
#include "mozilla/dom/EventTarget.h"
#include "nsContentUtils.h"
namespace mozilla {
using namespace dom;
/******************************************************************************
* mozilla::AsyncEventDispatcher
******************************************************************************/
AsyncEventDispatcher::AsyncEventDispatcher(EventTarget* aTarget,
WidgetEvent& aEvent)
: CancelableRunnable("AsyncEventDispatcher"),
mTarget(aTarget),
mEventMessage(eUnidentifiedEvent) {
MOZ_ASSERT(mTarget);
RefPtr<Event> event =
EventDispatcher::CreateEvent(aTarget, nullptr, &aEvent, u""_ns);
mEvent = std::move(event);
mEventType.SetIsVoid(true);
NS_ASSERTION(mEvent, "Should never fail to create an event");
mEvent->DuplicatePrivateData();
mEvent->SetTrusted(aEvent.IsTrusted());
}
NS_IMETHODIMP
AsyncEventDispatcher::Run() {
if (mCanceled) {
return NS_OK;
}
nsINode* node = nsINode::FromEventTargetOrNull(mTarget);
if (mCheckStillInDoc) {
MOZ_ASSERT(node);
if (!node->IsInComposedDoc()) {
return NS_OK;
}
}
mTarget->AsyncEventRunning(this);
if (mEventMessage != eUnidentifiedEvent) {
MOZ_ASSERT(mComposed == Composed::eDefault);
return nsContentUtils::DispatchTrustedEvent<WidgetEvent>(
node->OwnerDoc(), mTarget, mEventMessage, mCanBubble, Cancelable::eNo,
nullptr /* aDefaultAction */, mOnlyChromeDispatch);
}
// MOZ_KnownLives because this instance shouldn't be touched while running.
if (mEvent) {
DispatchEventOnTarget(MOZ_KnownLive(mTarget), MOZ_KnownLive(mEvent),
mOnlyChromeDispatch, mComposed);
} else {
DispatchEventOnTarget(MOZ_KnownLive(mTarget), mEventType, mCanBubble,
mOnlyChromeDispatch, mComposed);
}
return NS_OK;
}
// static
void AsyncEventDispatcher::DispatchEventOnTarget(
EventTarget* aTarget, const nsAString& aEventType, CanBubble aCanBubble,
ChromeOnlyDispatch aOnlyChromeDispatch, Composed aComposed) {
RefPtr<Event> event = NS_NewDOMEvent(aTarget, nullptr, nullptr);
event->InitEvent(aEventType, aCanBubble, Cancelable::eNo);
event->SetTrusted(true);
DispatchEventOnTarget(aTarget, event, aOnlyChromeDispatch, aComposed);
}
// static
void AsyncEventDispatcher::DispatchEventOnTarget(
EventTarget* aTarget, Event* aEvent, ChromeOnlyDispatch aOnlyChromeDispatch,
Composed aComposed) {
if (aComposed != Composed::eDefault) {
aEvent->WidgetEventPtr()->mFlags.mComposed = aComposed == Composed::eYes;
}
if (aOnlyChromeDispatch == ChromeOnlyDispatch::eYes) {
MOZ_ASSERT(aEvent->IsTrusted());
aEvent->WidgetEventPtr()->mFlags.mOnlyChromeDispatch = true;
}
aTarget->DispatchEvent(*aEvent);
}
nsresult AsyncEventDispatcher::Cancel() {
mCanceled = true;
return NS_OK;
}
nsresult AsyncEventDispatcher::PostDOMEvent() {
RefPtr<AsyncEventDispatcher> ensureDeletionWhenFailing = this;
if (NS_IsMainThread()) {
if (nsCOMPtr<nsIGlobalObject> global = mTarget->GetOwnerGlobal()) {
return global->Dispatch(TaskCategory::Other,
ensureDeletionWhenFailing.forget());
}
// Sometimes GetOwnerGlobal returns null because it uses
// GetScriptHandlingObject rather than GetScopeObject.
if (nsINode* node = nsINode::FromEventTargetOrNull(mTarget)) {
RefPtr<Document> doc = node->OwnerDoc();
return doc->Dispatch(TaskCategory::Other,
ensureDeletionWhenFailing.forget());
}
}
return NS_DispatchToCurrentThread(this);
}
void AsyncEventDispatcher::RunDOMEventWhenSafe() {
RefPtr<AsyncEventDispatcher> ensureDeletionWhenFailing = this;
nsContentUtils::AddScriptRunner(this);
}
// static
void AsyncEventDispatcher::RunDOMEventWhenSafe(
EventTarget& aTarget, const nsAString& aEventType, CanBubble aCanBubble,
ChromeOnlyDispatch aOnlyChromeDispatch /* = ChromeOnlyDispatch::eNo */,
Composed aComposed /* = Composed::eDefault */) {
if (nsContentUtils::IsSafeToRunScript()) {
OwningNonNull<EventTarget> target = aTarget;
DispatchEventOnTarget(target, aEventType, aCanBubble, aOnlyChromeDispatch,
aComposed);
return;
}
(new AsyncEventDispatcher(&aTarget, aEventType, aCanBubble,
aOnlyChromeDispatch, aComposed))
->RunDOMEventWhenSafe();
}
void AsyncEventDispatcher::RunDOMEventWhenSafe(
EventTarget& aTarget, Event& aEvent,
ChromeOnlyDispatch aOnlyChromeDispatch /* = ChromeOnlyDispatch::eNo */) {
if (nsContentUtils::IsSafeToRunScript()) {
DispatchEventOnTarget(&aTarget, &aEvent, aOnlyChromeDispatch,
Composed::eDefault);
return;
}
(new AsyncEventDispatcher(&aTarget, &aEvent, aOnlyChromeDispatch))
->RunDOMEventWhenSafe();
}
// static
nsresult AsyncEventDispatcher::RunDOMEventWhenSafe(
nsINode& aTarget, WidgetEvent& aEvent,
nsEventStatus* aEventStatus /* = nullptr */) {
if (nsContentUtils::IsSafeToRunScript()) {
// MOZ_KnownLive due to bug 1832202
nsPresContext* presContext = aTarget.OwnerDoc()->GetPresContext();
return EventDispatcher::Dispatch(MOZ_KnownLive(&aTarget),
MOZ_KnownLive(presContext), &aEvent,
nullptr, aEventStatus);
}
(new AsyncEventDispatcher(&aTarget, aEvent))->RunDOMEventWhenSafe();
return NS_OK;
}
void AsyncEventDispatcher::RequireNodeInDocument() {
MOZ_ASSERT(mTarget);
MOZ_ASSERT(mTarget->IsNode());
mCheckStillInDoc = true;
}
/******************************************************************************
* mozilla::LoadBlockingAsyncEventDispatcher
******************************************************************************/
LoadBlockingAsyncEventDispatcher::~LoadBlockingAsyncEventDispatcher() {
if (mBlockedDoc) {
mBlockedDoc->UnblockOnload(true);
}
}
} // namespace mozilla
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