blob: d4975f6da48ff212e4b449523e1e4f10e2fe1f19 [file] [log] [blame]
/*
* Copyright (C) 2017 Apple Inc. 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.
*/
#include "config.h"
#include "AbortSignal.h"
#include "AbortAlgorithm.h"
#include "DOMException.h"
#include "Event.h"
#include "EventNames.h"
#include "JSDOMException.h"
#include "ScriptExecutionContext.h"
#include <JavaScriptCore/Exception.h>
#include <wtf/IsoMallocInlines.h>
namespace WebCore {
WTF_MAKE_ISO_ALLOCATED_IMPL(AbortSignal);
Ref<AbortSignal> AbortSignal::create(ScriptExecutionContext* context)
{
return adoptRef(*new AbortSignal(context));
}
// https://dom.spec.whatwg.org/#dom-abortsignal-abort
Ref<AbortSignal> AbortSignal::abort(JSDOMGlobalObject& globalObject, ScriptExecutionContext& context, JSC::JSValue reason)
{
ASSERT(reason);
if (reason.isUndefined())
reason = toJS(&globalObject, &globalObject, DOMException::create(AbortError));
return adoptRef(*new AbortSignal(&context, Aborted::Yes, reason));
}
AbortSignal::AbortSignal(ScriptExecutionContext* context, Aborted aborted, JSC::JSValue reason)
: ContextDestructionObserver(context)
, m_aborted(aborted == Aborted::Yes)
, m_reason(reason)
{
ASSERT(reason);
}
// https://dom.spec.whatwg.org/#abortsignal-signal-abort
void AbortSignal::signalAbort(JSC::JSValue reason)
{
// 1. If signal's aborted flag is set, then return.
if (m_aborted)
return;
// 2. Set signal’s aborted flag.
m_aborted = true;
ASSERT(reason);
m_reason = reason;
Ref protectedThis { *this };
auto algorithms = std::exchange(m_algorithms, { });
for (auto& algorithm : algorithms)
algorithm();
// 5. Fire an event named abort at signal.
dispatchEvent(Event::create(eventNames().abortEvent, Event::CanBubble::No, Event::IsCancelable::No));
}
// https://dom.spec.whatwg.org/#abortsignal-follow
void AbortSignal::signalFollow(AbortSignal& signal)
{
if (aborted())
return;
if (signal.aborted()) {
signalAbort(signal.reason());
return;
}
ASSERT(!m_followingSignal);
m_followingSignal = signal;
signal.addAlgorithm([weakThis = WeakPtr { this }] {
if (weakThis)
weakThis->signalAbort(weakThis->m_followingSignal ? static_cast<JSC::JSValue>(weakThis->m_followingSignal->reason()) : JSC::jsUndefined());
});
}
bool AbortSignal::whenSignalAborted(AbortSignal& signal, Ref<AbortAlgorithm>&& algorithm)
{
if (signal.aborted()) {
algorithm->handleEvent();
return true;
}
signal.addAlgorithm([algorithm = WTFMove(algorithm)]() mutable {
algorithm->handleEvent();
});
return false;
}
void AbortSignal::throwIfAborted(JSC::JSGlobalObject& lexicalGlobalObject)
{
if (!aborted())
return;
auto& vm = lexicalGlobalObject.vm();
auto scope = DECLARE_THROW_SCOPE(vm);
throwException(&lexicalGlobalObject, scope, m_reason);
}
} // namespace WebCore