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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/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;
}
nsCOMPtr<nsINode> node = do_QueryInterface(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);
}
RefPtr<Event> event = mEvent;
if (!event) {
event = NS_NewDOMEvent(mTarget, nullptr, nullptr);
event->InitEvent(mEventType, mCanBubble, Cancelable::eNo);
event->SetTrusted(true);
}
if (mComposed != Composed::eDefault) {
event->WidgetEventPtr()->mFlags.mComposed = mComposed == Composed::eYes;
}
if (mOnlyChromeDispatch == ChromeOnlyDispatch::eYes) {
MOZ_ASSERT(event->IsTrusted());
event->WidgetEventPtr()->mFlags.mOnlyChromeDispatch = true;
}
mTarget->DispatchEvent(*event);
return NS_OK;
}
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 (nsCOMPtr<nsINode> node = do_QueryInterface(mTarget)) {
nsCOMPtr<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);
}
void AsyncEventDispatcher::RequireNodeInDocument() {
#ifdef DEBUG
nsCOMPtr<nsINode> node = do_QueryInterface(mTarget);
MOZ_ASSERT(node);
#endif
mCheckStillInDoc = true;
}
/******************************************************************************
* mozilla::LoadBlockingAsyncEventDispatcher
******************************************************************************/
LoadBlockingAsyncEventDispatcher::~LoadBlockingAsyncEventDispatcher() {
if (mBlockedDoc) {
mBlockedDoc->UnblockOnload(true);
}
}
} // namespace mozilla
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