зеркало из https://github.com/mozilla/gecko-dev.git
85 строки
2.0 KiB
C++
85 строки
2.0 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/DOMEventTargetHelper.h"
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#include "nsTObserverArray.h"
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namespace mozilla {
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namespace dom {
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class AbortSignal;
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class AbortSignalImpl;
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// This class must be implemented by objects who want to follow a
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// AbortSignalImpl.
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class AbortFollower {
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public:
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virtual void Abort() = 0;
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void Follow(AbortSignalImpl* aSignal);
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void Unfollow();
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bool IsFollowing() const;
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protected:
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virtual ~AbortFollower();
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// Subclasses of AbortFollower must Traverse this member and call
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// Unfollow() when Unlinking.
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RefPtr<AbortSignalImpl> mFollowingSignal;
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};
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// Any subclass of this class must Traverse mFollowingSignal and call
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// Unfollow() when Unlinking.
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class AbortSignalImpl : public AbortFollower, public nsISupports {
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public:
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explicit AbortSignalImpl(bool aAborted);
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bool Aborted() const;
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void Abort() override;
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void AddFollower(AbortFollower* aFollower);
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void RemoveFollower(AbortFollower* aFollower);
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protected:
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virtual ~AbortSignalImpl() = default;
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private:
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// Raw pointers. AbortFollower unregisters itself in the DTOR.
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nsTObserverArray<AbortFollower*> mFollowers;
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bool mAborted;
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};
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class AbortSignal final : public DOMEventTargetHelper, public AbortSignalImpl {
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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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void Abort() override;
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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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