131 lines
3.1 KiB
C++
131 lines
3.1 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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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 "AbortSignal.h"
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#include "AbortController.h"
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#include "mozilla/dom/Event.h"
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#include "mozilla/dom/AbortSignalBinding.h"
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namespace mozilla {
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namespace dom {
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NS_IMPL_CYCLE_COLLECTION_CLASS(AbortSignal)
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_INHERITED(AbortSignal,
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DOMEventTargetHelper)
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mController)
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
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NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN_INHERITED(AbortSignal,
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DOMEventTargetHelper)
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NS_IMPL_CYCLE_COLLECTION_UNLINK(mController)
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NS_IMPL_CYCLE_COLLECTION_UNLINK_END
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NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION_INHERITED(AbortSignal)
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NS_INTERFACE_MAP_END_INHERITING(DOMEventTargetHelper)
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NS_IMPL_ADDREF_INHERITED(AbortSignal, DOMEventTargetHelper)
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NS_IMPL_RELEASE_INHERITED(AbortSignal, DOMEventTargetHelper)
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AbortSignal::AbortSignal(AbortController* aController,
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bool aAborted)
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: DOMEventTargetHelper(aController->GetParentObject())
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, mController(aController)
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, mAborted(aAborted)
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{}
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AbortSignal::AbortSignal(bool aAborted)
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: mAborted(aAborted)
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{}
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JSObject*
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AbortSignal::WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto)
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{
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return AbortSignalBinding::Wrap(aCx, this, aGivenProto);
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}
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bool
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AbortSignal::Aborted() const
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{
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return mAborted;
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}
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void
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AbortSignal::Abort()
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{
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// Re-entrancy guard
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if (mAborted) {
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return;
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}
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mAborted = true;
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// We might be deleted as a result of aborting a follower, so ensure we
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// stay alive until all followers have been aborted.
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RefPtr<AbortSignal> pinThis = this;
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// Let's inform the followers.
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for (uint32_t i = 0; i < mFollowers.Length(); ++i) {
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mFollowers[i]->Aborted();
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}
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EventInit init;
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init.mBubbles = false;
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init.mCancelable = false;
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RefPtr<Event> event =
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Event::Constructor(this, NS_LITERAL_STRING("abort"), init);
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event->SetTrusted(true);
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bool dummy;
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DispatchEvent(event, &dummy);
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}
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void
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AbortSignal::AddFollower(AbortSignal::Follower* aFollower)
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{
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MOZ_DIAGNOSTIC_ASSERT(aFollower);
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if (!mFollowers.Contains(aFollower)) {
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mFollowers.AppendElement(aFollower);
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}
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}
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void
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AbortSignal::RemoveFollower(AbortSignal::Follower* aFollower)
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{
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MOZ_DIAGNOSTIC_ASSERT(aFollower);
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mFollowers.RemoveElement(aFollower);
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}
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// AbortSignal::Follower
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// ----------------------------------------------------------------------------
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AbortSignal::Follower::~Follower()
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{
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Unfollow();
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}
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void
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AbortSignal::Follower::Follow(AbortSignal* aSignal)
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{
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MOZ_DIAGNOSTIC_ASSERT(aSignal);
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Unfollow();
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mFollowingSignal = aSignal;
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aSignal->AddFollower(this);
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}
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void
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AbortSignal::Follower::Unfollow()
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{
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if (mFollowingSignal) {
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mFollowingSignal->RemoveFollower(this);
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mFollowingSignal = nullptr;
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}
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}
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} // dom namespace
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} // mozilla namespace
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