зеркало из https://github.com/mozilla/gecko-dev.git
122 строки
3.9 KiB
C++
122 строки
3.9 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/AsyncEventDispatcher.h"
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#include "mozilla/BasicEvents.h"
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#include "mozilla/EventDispatcher.h"
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#include "mozilla/dom/Event.h"
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#include "mozilla/dom/EventTarget.h"
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#include "nsContentUtils.h"
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namespace mozilla {
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using namespace dom;
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/******************************************************************************
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* mozilla::AsyncEventDispatcher
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******************************************************************************/
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AsyncEventDispatcher::AsyncEventDispatcher(EventTarget* aTarget,
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WidgetEvent& aEvent)
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: CancelableRunnable("AsyncEventDispatcher"),
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mTarget(aTarget),
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mEventMessage(eUnidentifiedEvent) {
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MOZ_ASSERT(mTarget);
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RefPtr<Event> event =
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EventDispatcher::CreateEvent(aTarget, nullptr, &aEvent, EmptyString());
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mEvent = std::move(event);
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mEventType.SetIsVoid(true);
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NS_ASSERTION(mEvent, "Should never fail to create an event");
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mEvent->DuplicatePrivateData();
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mEvent->SetTrusted(aEvent.IsTrusted());
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}
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NS_IMETHODIMP
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AsyncEventDispatcher::Run() {
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if (mCanceled) {
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return NS_OK;
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}
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nsCOMPtr<nsINode> node = do_QueryInterface(mTarget);
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if (mCheckStillInDoc) {
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MOZ_ASSERT(node);
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if (!node->IsInComposedDoc()) {
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return NS_OK;
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}
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}
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mTarget->AsyncEventRunning(this);
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if (mEventMessage != eUnidentifiedEvent) {
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MOZ_ASSERT(mComposed == Composed::eDefault);
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return nsContentUtils::DispatchTrustedEvent<WidgetEvent>(
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node->OwnerDoc(), mTarget, mEventMessage, mCanBubble, Cancelable::eNo,
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nullptr /* aDefaultAction */, mOnlyChromeDispatch);
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}
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RefPtr<Event> event = mEvent;
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if (!event) {
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event = NS_NewDOMEvent(mTarget, nullptr, nullptr);
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event->InitEvent(mEventType, mCanBubble, Cancelable::eNo);
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event->SetTrusted(true);
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}
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if (mComposed != Composed::eDefault) {
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event->WidgetEventPtr()->mFlags.mComposed = mComposed == Composed::eYes;
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}
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if (mOnlyChromeDispatch == ChromeOnlyDispatch::eYes) {
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MOZ_ASSERT(event->IsTrusted());
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event->WidgetEventPtr()->mFlags.mOnlyChromeDispatch = true;
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}
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mTarget->DispatchEvent(*event);
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return NS_OK;
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}
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nsresult AsyncEventDispatcher::Cancel() {
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mCanceled = true;
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return NS_OK;
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}
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nsresult AsyncEventDispatcher::PostDOMEvent() {
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RefPtr<AsyncEventDispatcher> ensureDeletionWhenFailing = this;
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if (NS_IsMainThread()) {
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if (nsCOMPtr<nsIGlobalObject> global = mTarget->GetOwnerGlobal()) {
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return global->Dispatch(TaskCategory::Other,
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ensureDeletionWhenFailing.forget());
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}
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// Sometimes GetOwnerGlobal returns null because it uses
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// GetScriptHandlingObject rather than GetScopeObject.
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if (nsCOMPtr<nsINode> node = do_QueryInterface(mTarget)) {
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nsCOMPtr<Document> doc = node->OwnerDoc();
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return doc->Dispatch(TaskCategory::Other,
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ensureDeletionWhenFailing.forget());
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}
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}
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return NS_DispatchToCurrentThread(this);
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}
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void AsyncEventDispatcher::RunDOMEventWhenSafe() {
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RefPtr<AsyncEventDispatcher> ensureDeletionWhenFailing = this;
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nsContentUtils::AddScriptRunner(this);
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}
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void AsyncEventDispatcher::RequireNodeInDocument() {
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#ifdef DEBUG
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nsCOMPtr<nsINode> node = do_QueryInterface(mTarget);
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MOZ_ASSERT(node);
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#endif
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mCheckStillInDoc = true;
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}
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/******************************************************************************
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* mozilla::LoadBlockingAsyncEventDispatcher
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******************************************************************************/
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LoadBlockingAsyncEventDispatcher::~LoadBlockingAsyncEventDispatcher() {
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if (mBlockedDoc) {
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mBlockedDoc->UnblockOnload(true);
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}
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}
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} // namespace mozilla
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