78 lines
2.8 KiB
C++
78 lines
2.8 KiB
C++
/*
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* Copyright (C) 2010 Julien Chaffraix <jchaffraix@webkit.org>
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* All right reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#pragma once
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#include "SuspendableTimer.h"
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#include <wtf/Forward.h>
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#include <wtf/Vector.h>
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namespace WebCore {
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class Event;
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class XMLHttpRequest;
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enum ProgressEventAction {
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DoNotFlushProgressEvent,
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FlushProgressEvent
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};
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// This implements the XHR2 progress event dispatching: "dispatch a progress event called progress
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// about every 50ms or for every byte received, whichever is least frequent".
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class XMLHttpRequestProgressEventThrottle {
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public:
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explicit XMLHttpRequestProgressEventThrottle(XMLHttpRequest&);
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virtual ~XMLHttpRequestProgressEventThrottle();
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void updateProgress(bool isAsync, bool lengthComputable, unsigned long long loaded, unsigned long long total);
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void dispatchReadyStateChangeEvent(Event&, ProgressEventAction = DoNotFlushProgressEvent);
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void dispatchProgressEvent(const AtomString&);
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void suspend();
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void resume();
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private:
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static const Seconds minimumProgressEventDispatchingInterval;
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void dispatchThrottledProgressEventTimerFired();
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void flushProgressEvent();
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void dispatchEventWhenPossible(Event&);
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// Weak pointer to our XMLHttpRequest object as it is the one holding us.
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XMLHttpRequest& m_target;
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unsigned long long m_loaded { 0 };
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unsigned long long m_total { 0 };
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SuspendableTimer m_dispatchThrottledProgressEventTimer;
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bool m_hasPendingThrottledProgressEvent { false };
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bool m_lengthComputable { false };
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bool m_shouldDeferEventsDueToSuspension { false };
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};
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} // namespace WebCore
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