root/Source/modules/performance/SharedWorkerPerformance.cpp

DEFINITIONS

1. supplementName
2. from
3. workerStart
4. getWorkerStart

/*
 * Copyright (c) 2014, Opera Software ASA. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
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 *    from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
 * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
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#include "config.h"
#include "modules/performance/SharedWorkerPerformance.h"

#include "core/dom/Document.h"
#include "core/dom/ExecutionContext.h"
#include "core/loader/DocumentLoadTiming.h"
#include "core/loader/DocumentLoader.h"
#include "core/workers/SharedWorker.h"

namespace WebCore {

SharedWorkerPerformance::SharedWorkerPerformance()
    : m_timeOrigin(monotonicallyIncreasingTime())
{
}

const char* SharedWorkerPerformance::supplementName()
{
    return "SharedWorkerPerformance";
}

SharedWorkerPerformance& SharedWorkerPerformance::from(SharedWorker& sharedWorker)
{
    SharedWorkerPerformance* supplement = static_cast<SharedWorkerPerformance*>(WillBeHeapSupplement<SharedWorker>::from(sharedWorker, supplementName()));
    if (!supplement) {
        supplement = new SharedWorkerPerformance();
        provideTo(sharedWorker, supplementName(), adoptPtrWillBeNoop(supplement));
    }
    return *supplement;
}

double SharedWorkerPerformance::workerStart(ExecutionContext* context, SharedWorker& sharedWorker)
{
    return SharedWorkerPerformance::from(sharedWorker).getWorkerStart(context, sharedWorker);
}

double SharedWorkerPerformance::getWorkerStart(ExecutionContext* context, SharedWorker&) const
{
    ASSERT(context);
    ASSERT(context->isDocument());
    Document* document = toDocument(context);
    if (!document->loader())
        return 0;

    double navigationStart = document->loader()->timing()->navigationStart();
    return m_timeOrigin - navigationStart;
}

} // namespace WebCore