/* * Copyright (C) 2016 Canon Inc. * * Redistribution and use in source and binary forms, with or without * modification, are permitted, provided that the following conditions * are required to be 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. * 3. Neither the name of Canon Inc. nor the names of * 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 * DISCLAIMED. IN NO EVENT SHALL CANON INC. AND 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 "ReadableStreamDefaultController.h" #include <wtf/Optional.h> namespace WebCore { template<typename IDLType> class DOMPromiseDeferred; class ReadableStreamSource : public RefCounted<ReadableStreamSource> { public: virtual ~ReadableStreamSource(); void start(ReadableStreamDefaultController&&, DOMPromiseDeferred<void>&&); void pull(DOMPromiseDeferred<void>&&); void cancel(JSC::JSValue); bool isPulling() const { return !!m_promise; } protected: ReadableStreamDefaultController& controller() { return m_controller.value(); } const ReadableStreamDefaultController& controller() const { return m_controller.value(); } void startFinished(); void pullFinished(); void cancelFinished(); void clean(); virtual void setActive() = 0; virtual void setInactive() = 0; virtual void doStart() = 0; virtual void doPull() = 0; virtual void doCancel() = 0; private: std::unique_ptr<DOMPromiseDeferred<void>> m_promise; Optional<ReadableStreamDefaultController> m_controller; }; } // namespace WebCore