1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95
|
/*
* Copyright (C) 2024 Keith Cirkel <webkit@keithcirkel.co.uk>. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/
#pragma once
#include "AbortController.h"
#include "ActiveDOMObject.h"
#include "InternalObserver.h"
#include "ScriptWrappable.h"
#include "SubscribeOptions.h"
#include "VoidCallback.h"
#include <wtf/RefCounted.h>
namespace WebCore {
class ScriptExecutionContext;
class Subscriber final : public ActiveDOMObject, public ScriptWrappable, public RefCounted<Subscriber> {
WTF_MAKE_TZONE_OR_ISO_ALLOCATED(Subscriber);
public:
void ref() const final { RefCounted::ref(); }
void deref() const final { RefCounted::deref(); }
void next(JSC::JSValue);
void complete();
void error(JSC::JSValue);
void addTeardown(Ref<VoidCallback>);
bool active() { return m_active; }
AbortSignal& signal() { return m_signal.get(); }
Ref<AbortSignal> protectedSignal() const { return m_signal; }
static Ref<Subscriber> create(ScriptExecutionContext&, Ref<InternalObserver>&&, const SubscribeOptions&);
void reportErrorObject(JSC::JSValue);
// JSCustomMarkFunction; for JSSubscriberCustom
Vector<VoidCallback*> teardownCallbacksConcurrently();
InternalObserver* observerConcurrently();
void visitAdditionalChildren(JSC::AbstractSlotVisitor&);
private:
explicit Subscriber(ScriptExecutionContext&, Ref<InternalObserver>&&, const SubscribeOptions&);
void followSignal(AbortSignal&);
void close(JSC::JSValue);
bool isActive() const
{
return m_active && !isInactiveDocument();
}
bool isInactiveDocument() const;
// ActiveDOMObject
void stop() final
{
Locker locker { m_teardownsLock };
m_teardowns.clear();
}
bool virtualHasPendingActivity() const final { return m_active; }
bool m_active = true;
Lock m_teardownsLock;
Ref<AbortSignal> m_signal;
Ref<InternalObserver> m_observer;
SubscribeOptions m_options;
Vector<Ref<VoidCallback>> m_teardowns WTF_GUARDED_BY_LOCK(m_teardownsLock);
};
} // namespace WebCore
|