Source/WebCore/bindings/js/JSReadableStreamSourceCustom.cpp

/*
 * Copyright (C) 2016 Canon Inc.
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 * modification, are permitted, provided that the following conditions
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 *
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 *     notice, this list of conditions and the following disclaimer in the
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 *     its contributors may be used to endorse or promote products derived
 *     from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY CANON 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
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#include "config.h"
#include "JSReadableStreamSource.h"

#if ENABLE(STREAMS_API)


namespace WebCore {
using namespace JSC;

JSValue JSReadableStreamSource::start(ExecState& state, Ref<DeferredPromise>&& promise)
{
    VM& vm = state.vm();
    
    // FIXME: Why is it ok to ASSERT the argument count here?
    ASSERT(state.argumentCount());
    JSReadableStreamDefaultController* controller = jsDynamicCast<JSReadableStreamDefaultController*>(vm, state.uncheckedArgument(0));
    ASSERT(controller);

    m_controller.set(vm, this, controller);

    wrapped().start(ReadableStreamDefaultController(controller), WTFMove(promise));

    return jsUndefined();
}

JSValue JSReadableStreamSource::pull(ExecState&, Ref<DeferredPromise>&& promise)
{
    wrapped().pull(WTFMove(promise));
    return jsUndefined();
}

JSValue JSReadableStreamSource::controller(ExecState&) const
{
    ASSERT_NOT_REACHED();
    return jsUndefined();
}

}

#endif // ENABLE(STREAMS_API)