third_party/WebKit/Source/core/timing/PerformanceCompositeTiming.cpp

/*
 * Copyright (C) 2015 Google Inc. All rights reserved.
 * Copyright (C) 2015 Intel Inc. All rights reserved.
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 * in the documentation and/or other materials provided with the
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 * this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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#include "core/timing/PerformanceCompositeTiming.h"

#include "bindings/core/v8/V8ObjectBuilder.h"
#include "core/dom/Document.h"
#include "core/loader/DocumentLoader.h"

namespace blink {

static double monotonicTimeToDocumentMilliseconds(Document* document, double seconds)
{
    ASSERT(seconds >= 0.0);
    return document->loader()->timing().monotonicTimeToZeroBasedDocumentTime(seconds) * 1000.0;
}

PerformanceCompositeTiming::PerformanceCompositeTiming(Document* requestingDocument, unsigned sourceFrame, double startTime)
    : PerformanceEntry(requestingDocument->url().getString(), "composite", monotonicTimeToDocumentMilliseconds(requestingDocument, startTime), monotonicTimeToDocumentMilliseconds(requestingDocument, startTime))
    , m_sourceFrame(sourceFrame)
    , m_requestingDocument(requestingDocument)
{
}

PerformanceCompositeTiming::~PerformanceCompositeTiming()
{
}

unsigned PerformanceCompositeTiming::sourceFrame() const
{
    return m_sourceFrame;
}

void PerformanceCompositeTiming::buildJSONValue(V8ObjectBuilder& builder) const
{
    PerformanceEntry::buildJSONValue(builder);
    builder.addNumber("sourceFrame", sourceFrame());
}

DEFINE_TRACE(PerformanceCompositeTiming)
{
    visitor->trace(m_requestingDocument);
    PerformanceEntry::trace(visitor);
}

} // namespace blink