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/*
* Copyright (C) 2023 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. ``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
* 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 "TransformStream.h"
#include "JSDOMConvertObject.h"
#include "JSDOMConvertSequences.h"
#include "JSReadableStream.h"
#include "JSTransformStream.h"
#include "JSWritableStream.h"
#include "WebCoreJSClientData.h"
#include <JavaScriptCore/JSObjectInlines.h>
namespace WebCore {
struct CreateInternalTransformStreamResult {
JSC::JSValue transform;
Ref<ReadableStream> readable;
Ref<WritableStream> writable;
};
static ExceptionOr<CreateInternalTransformStreamResult> createInternalTransformStream(JSDOMGlobalObject&, JSC::JSValue transformer, JSC::JSValue writableStrategy, JSC::JSValue readableStrategy);
ExceptionOr<Ref<TransformStream>> TransformStream::create(JSC::JSGlobalObject& globalObject, std::optional<JSC::Strong<JSC::JSObject>>&& transformer, std::optional<JSC::Strong<JSC::JSObject>>&& writableStrategy, std::optional<JSC::Strong<JSC::JSObject>>&& readableStrategy)
{
JSC::JSValue transformerValue = JSC::jsUndefined();
if (transformer)
transformerValue = transformer->get();
JSC::JSValue writableStrategyValue = JSC::jsUndefined();
if (writableStrategy)
writableStrategyValue = writableStrategy->get();
JSC::JSValue readableStrategyValue = JSC::jsUndefined();
if (readableStrategy)
readableStrategyValue = readableStrategy->get();
auto result = createInternalTransformStream(*JSC::jsCast<JSDOMGlobalObject*>(&globalObject), transformerValue, writableStrategyValue, readableStrategyValue);
if (result.hasException())
return result.releaseException();
auto transformResult = result.releaseReturnValue();
return adoptRef(*new TransformStream(transformResult.transform, WTFMove(transformResult.readable), WTFMove(transformResult.writable)));
}
TransformStream::TransformStream(JSC::JSValue internalTransformStream, Ref<ReadableStream>&& readable, Ref<WritableStream>&& writable)
: m_internalTransformStream(internalTransformStream)
, m_readable(WTFMove(readable))
, m_writable(WTFMove(writable))
{
}
TransformStream::~TransformStream()
{
}
static ExceptionOr<JSC::JSValue> invokeTransformStreamFunction(JSC::JSGlobalObject& globalObject, const JSC::Identifier& identifier, const JSC::MarkedArgumentBuffer& arguments)
{
JSC::VM& vm = globalObject.vm();
JSC::JSLockHolder lock(vm);
auto scope = DECLARE_CATCH_SCOPE(vm);
auto function = globalObject.get(&globalObject, identifier);
ASSERT(function.isCallable());
scope.assertNoExceptionExceptTermination();
auto callData = JSC::getCallData(function);
auto result = call(&globalObject, function, callData, JSC::jsUndefined(), arguments);
RETURN_IF_EXCEPTION(scope, Exception { ExistingExceptionError });
return result;
}
ExceptionOr<CreateInternalTransformStreamResult> createInternalTransformStream(JSDOMGlobalObject& globalObject, JSC::JSValue transformer, JSC::JSValue writableStrategy, JSC::JSValue readableStrategy)
{
auto* clientData = static_cast<JSVMClientData*>(globalObject.vm().clientData);
auto& privateName = clientData->builtinFunctions().transformStreamInternalsBuiltins().createInternalTransformStreamFromTransformerPrivateName();
JSC::MarkedArgumentBuffer arguments;
arguments.append(transformer);
arguments.append(writableStrategy);
arguments.append(readableStrategy);
ASSERT(!arguments.hasOverflowed());
auto result = invokeTransformStreamFunction(globalObject, privateName, arguments);
if (UNLIKELY(result.hasException()))
return result.releaseException();
auto results = Detail::SequenceConverter<IDLObject>::convert(globalObject, result.returnValue());
ASSERT(results.size() == 3);
return CreateInternalTransformStreamResult { results[0].get(), JSC::jsDynamicCast<JSReadableStream*>(results[1].get())->wrapped(), JSC::jsDynamicCast<JSWritableStream*>(results[2].get())->wrapped() };
}
template<typename Visitor>
void JSTransformStream::visitAdditionalChildren(Visitor& visitor)
{
wrapped().internalTransformStream().visit(visitor);
}
DEFINE_VISIT_ADDITIONAL_CHILDREN(JSTransformStream);
} // namespace WebCore
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