Source/core/timing/PerformanceTiming.cpp

/* [<][>][^][v][top][bottom][index][help] */
This source file includes following definitions.
toIntegerMilliseconds
navigationStart
unloadEventStart
unloadEventEnd
redirectStart
redirectEnd
fetchStart
domainLookupStart
domainLookupEnd
connectStart
connectEnd
secureConnectionStart
requestStart
responseStart
responseEnd
domLoading
domInteractive
domContentLoadedEventStart
domContentLoadedEventEnd
domComplete
loadEventStart
loadEventEnd
documentLoader
documentTiming
documentLoadTiming
resourceLoadTiming
monotonicTimeToIntegerMilliseconds
/*
 * Copyright (C) 2010 Google 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:
 *
 *     * Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 *     * 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.
 *     * Neither the name of Google 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 THE COPYRIGHT HOLDERS AND 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 THE COPYRIGHT
 * OWNER 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 "core/timing/PerformanceTiming.h"

#include "core/dom/Document.h"
#include "core/dom/DocumentTiming.h"
#include "core/frame/LocalFrame.h"
#include "core/loader/DocumentLoadTiming.h"
#include "core/loader/DocumentLoader.h"
#include "core/loader/FrameLoader.h"
#include "platform/network/ResourceLoadTiming.h"
#include "platform/network/ResourceResponse.h"

namespace WebCore {

static unsigned long long toIntegerMilliseconds(double seconds)
{
    ASSERT(seconds >= 0);
    return static_cast<unsigned long long>(seconds * 1000.0);
}

PerformanceTiming::PerformanceTiming(LocalFrame* frame)
    : DOMWindowProperty(frame)
{
    ScriptWrappable::init(this);
}

unsigned long long PerformanceTiming::navigationStart() const
{
    DocumentLoadTiming* timing = documentLoadTiming();
    if (!timing)
        return 0;

    return monotonicTimeToIntegerMilliseconds(timing->navigationStart());
}

unsigned long long PerformanceTiming::unloadEventStart() const
{
    DocumentLoadTiming* timing = documentLoadTiming();
    if (!timing)
        return 0;

    if (timing->hasCrossOriginRedirect() || !timing->hasSameOriginAsPreviousDocument())
        return 0;

    return monotonicTimeToIntegerMilliseconds(timing->unloadEventStart());
}

unsigned long long PerformanceTiming::unloadEventEnd() const
{
    DocumentLoadTiming* timing = documentLoadTiming();
    if (!timing)
        return 0;

    if (timing->hasCrossOriginRedirect() || !timing->hasSameOriginAsPreviousDocument())
        return 0;

    return monotonicTimeToIntegerMilliseconds(timing->unloadEventEnd());
}

unsigned long long PerformanceTiming::redirectStart() const
{
    DocumentLoadTiming* timing = documentLoadTiming();
    if (!timing)
        return 0;

    if (timing->hasCrossOriginRedirect())
        return 0;

    return monotonicTimeToIntegerMilliseconds(timing->redirectStart());
}

unsigned long long PerformanceTiming::redirectEnd() const
{
    DocumentLoadTiming* timing = documentLoadTiming();
    if (!timing)
        return 0;

    if (timing->hasCrossOriginRedirect())
        return 0;

    return monotonicTimeToIntegerMilliseconds(timing->redirectEnd());
}

unsigned long long PerformanceTiming::fetchStart() const
{
    DocumentLoadTiming* timing = documentLoadTiming();
    if (!timing)
        return 0;

    return monotonicTimeToIntegerMilliseconds(timing->fetchStart());
}

unsigned long long PerformanceTiming::domainLookupStart() const
{
    ResourceLoadTiming* timing = resourceLoadTiming();
    if (!timing)
        return fetchStart();

    // This will be zero when a DNS request is not performed.
    // Rather than exposing a special value that indicates no DNS, we "backfill" with fetchStart.
    double dnsStart = timing->dnsStart;
    if (dnsStart == 0.0)
        return fetchStart();

    return monotonicTimeToIntegerMilliseconds(dnsStart);
}

unsigned long long PerformanceTiming::domainLookupEnd() const
{
    ResourceLoadTiming* timing = resourceLoadTiming();
    if (!timing)
        return domainLookupStart();

    // This will be zero when a DNS request is not performed.
    // Rather than exposing a special value that indicates no DNS, we "backfill" with domainLookupStart.
    double dnsEnd = timing->dnsEnd;
    if (dnsEnd == 0.0)
        return domainLookupStart();

    return monotonicTimeToIntegerMilliseconds(dnsEnd);
}

unsigned long long PerformanceTiming::connectStart() const
{
    DocumentLoader* loader = documentLoader();
    if (!loader)
        return domainLookupEnd();

    ResourceLoadTiming* timing = loader->response().resourceLoadTiming();
    if (!timing)
        return domainLookupEnd();

    // connectStart will be zero when a network request is not made.
    // Rather than exposing a special value that indicates no new connection, we "backfill" with domainLookupEnd.
    double connectStart = timing->connectStart;
    if (connectStart == 0.0 || loader->response().connectionReused())
        return domainLookupEnd();

    // ResourceLoadTiming's connect phase includes DNS, however Navigation Timing's
    // connect phase should not. So if there is DNS time, trim it from the start.
    if (timing->dnsEnd > 0.0 && timing->dnsEnd > connectStart)
        connectStart = timing->dnsEnd;

    return monotonicTimeToIntegerMilliseconds(connectStart);
}

unsigned long long PerformanceTiming::connectEnd() const
{
    DocumentLoader* loader = documentLoader();
    if (!loader)
        return connectStart();

    ResourceLoadTiming* timing = loader->response().resourceLoadTiming();
    if (!timing)
        return connectStart();

    // connectEnd will be zero when a network request is not made.
    // Rather than exposing a special value that indicates no new connection, we "backfill" with connectStart.
    double connectEnd = timing->connectEnd;
    if (connectEnd == 0.0 || loader->response().connectionReused())
        return connectStart();

    return monotonicTimeToIntegerMilliseconds(connectEnd);
}

unsigned long long PerformanceTiming::secureConnectionStart() const
{
    DocumentLoader* loader = documentLoader();
    if (!loader)
        return 0;

    ResourceLoadTiming* timing = loader->response().resourceLoadTiming();
    if (!timing)
        return 0;

    double sslStart = timing->sslStart;
    if (sslStart == 0.0)
        return 0;

    return monotonicTimeToIntegerMilliseconds(sslStart);
}

unsigned long long PerformanceTiming::requestStart() const
{
    ResourceLoadTiming* timing = resourceLoadTiming();

    if (!timing || timing->sendStart == 0.0)
        return connectEnd();

    return monotonicTimeToIntegerMilliseconds(timing->sendStart);
}

unsigned long long PerformanceTiming::responseStart() const
{
    ResourceLoadTiming* timing = resourceLoadTiming();
    if (!timing || timing->receiveHeadersEnd == 0.0)
        return requestStart();

    // FIXME: Response start needs to be the time of the first received byte.
    // However, the ResourceLoadTiming API currently only supports the time
    // the last header byte was received. For many responses with reasonable
    // sized cookies, the HTTP headers fit into a single packet so this time
    // is basically equivalent. But for some responses, particularly those with
    // headers larger than a single packet, this time will be too late.
    return monotonicTimeToIntegerMilliseconds(timing->receiveHeadersEnd);
}

unsigned long long PerformanceTiming::responseEnd() const
{
    DocumentLoadTiming* timing = documentLoadTiming();
    if (!timing)
        return 0;

    return monotonicTimeToIntegerMilliseconds(timing->responseEnd());
}

unsigned long long PerformanceTiming::domLoading() const
{
    const DocumentTiming* timing = documentTiming();
    if (!timing)
        return fetchStart();

    return monotonicTimeToIntegerMilliseconds(timing->domLoading);
}

unsigned long long PerformanceTiming::domInteractive() const
{
    const DocumentTiming* timing = documentTiming();
    if (!timing)
        return 0;

    return monotonicTimeToIntegerMilliseconds(timing->domInteractive);
}

unsigned long long PerformanceTiming::domContentLoadedEventStart() const
{
    const DocumentTiming* timing = documentTiming();
    if (!timing)
        return 0;

    return monotonicTimeToIntegerMilliseconds(timing->domContentLoadedEventStart);
}

unsigned long long PerformanceTiming::domContentLoadedEventEnd() const
{
    const DocumentTiming* timing = documentTiming();
    if (!timing)
        return 0;

    return monotonicTimeToIntegerMilliseconds(timing->domContentLoadedEventEnd);
}

unsigned long long PerformanceTiming::domComplete() const
{
    const DocumentTiming* timing = documentTiming();
    if (!timing)
        return 0;

    return monotonicTimeToIntegerMilliseconds(timing->domComplete);
}

unsigned long long PerformanceTiming::loadEventStart() const
{
    DocumentLoadTiming* timing = documentLoadTiming();
    if (!timing)
        return 0;

    return monotonicTimeToIntegerMilliseconds(timing->loadEventStart());
}

unsigned long long PerformanceTiming::loadEventEnd() const
{
    DocumentLoadTiming* timing = documentLoadTiming();
    if (!timing)
        return 0;

    return monotonicTimeToIntegerMilliseconds(timing->loadEventEnd());
}

DocumentLoader* PerformanceTiming::documentLoader() const
{
    if (!m_frame)
        return 0;

    return m_frame->loader().documentLoader();
}

const DocumentTiming* PerformanceTiming::documentTiming() const
{
    if (!m_frame)
        return 0;

    Document* document = m_frame->document();
    if (!document)
        return 0;

    return &document->timing();
}

DocumentLoadTiming* PerformanceTiming::documentLoadTiming() const
{
    DocumentLoader* loader = documentLoader();
    if (!loader)
        return 0;

    return loader->timing();
}

ResourceLoadTiming* PerformanceTiming::resourceLoadTiming() const
{
    DocumentLoader* loader = documentLoader();
    if (!loader)
        return 0;

    return loader->response().resourceLoadTiming();
}

unsigned long long PerformanceTiming::monotonicTimeToIntegerMilliseconds(double monotonicSeconds) const
{
    ASSERT(monotonicSeconds >= 0);
    const DocumentLoadTiming* timing = documentLoadTiming();
    if (!timing)
        return 0;

    return toIntegerMilliseconds(timing->monotonicTimeToPseudoWallTime(monotonicSeconds));
}

} // namespace WebCore
/* [<][>][^][v][top][bottom][index][help] */
root/Source/core/timing/PerformanceTiming.cpp

DEFINITIONS
