зеркало из https://github.com/mozilla/gecko-dev.git
56 строки
1.9 KiB
C++
56 строки
1.9 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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#ifndef mozilla_dom_AbortSignal_h
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#define mozilla_dom_AbortSignal_h
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#include "mozilla/dom/AbortFollower.h"
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#include "mozilla/DOMEventTargetHelper.h"
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namespace mozilla {
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namespace dom {
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// AbortSignal the spec concept includes the concept of a child signal
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// "following" a parent signal -- internally, adding abort steps to the parent
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// signal that will then signal abort on the child signal -- to propagate
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// signaling abort from one signal to another. See
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// <https://dom.spec.whatwg.org/#abortsignal-follow>.
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//
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// This requires that AbortSignal also inherit from AbortFollower.
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//
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// This ability to follow isn't directly exposed in the DOM; as of this writing
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// it appears only to be used internally in the Fetch API. It might be a good
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// idea to split AbortSignal into an implementation that can follow, and an
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// implementation that can't, to provide this complexity only when it's needed.
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class AbortSignal final : public DOMEventTargetHelper,
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public AbortSignalImpl,
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public AbortFollower {
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public:
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NS_DECL_ISUPPORTS_INHERITED
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NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(AbortSignal, DOMEventTargetHelper)
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AbortSignal(nsIGlobalObject* aGlobalObject, bool aAborted);
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JSObject* WrapObject(JSContext* aCx,
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JS::Handle<JSObject*> aGivenProto) override;
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IMPL_EVENT_HANDLER(abort);
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// AbortSignalImpl
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void SignalAbort() override;
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// AbortFollower
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void RunAbortAlgorithm() override { SignalAbort(); }
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private:
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~AbortSignal() = default;
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};
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} // namespace dom
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} // namespace mozilla
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#endif // mozilla_dom_AbortSignal_h
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