xref: /external/chromium_org/third_party/WebKit/Source/core/rendering/LayoutRectRecorder.cpp

/*
 * Copyright (c) 2013, Google Inc. All rights reserved.
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 * modification, are permitted provided that the following conditions are
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 *
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 * in the documentation and/or other materials provided with the
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 *
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#include "config.h"
#include "core/rendering/LayoutRectRecorder.h"

#include "core/rendering/RenderObject.h"

namespace WebCore {

bool LayoutRectRecorder::shouldRecordLayoutRects()
{
    bool isTracing;
    TRACE_EVENT_CATEGORY_GROUP_ENABLED(TRACE_DISABLED_BY_DEFAULT("blink.debug.layout"), &isTracing);
    return RuntimeEnabledFeatures::repaintAfterLayoutEnabled() || isTracing;
}

LayoutRectRecorder::LayoutRectRecorder(RenderObject& object, bool skipRecording)
    : m_object(object)
    , m_skipRecording(skipRecording)
{
    if (!shouldRecordLayoutRects())
        return;
    if (m_skipRecording)
        return;

    if (!m_object.layoutDidGetCalled())
        m_object.setOldRepaintRect(m_object.clippedOverflowRectForRepaint(m_object.containerForRepaint()));

    // If should do repaint was set previously make sure we don't accidentally unset it.
    if (!m_object.shouldDoFullRepaintAfterLayout())
        m_object.setShouldDoFullRepaintAfterLayout(m_object.selfNeedsLayout());

    m_object.setLayoutDidGetCalled(true);
}

LayoutRectRecorder::~LayoutRectRecorder()
{
    if (!shouldRecordLayoutRects())
        return;
    if (m_skipRecording)
        return;

    // Note, we don't store the repaint container because it can change during layout.
    m_object.setNewRepaintRect(m_object.clippedOverflowRectForRepaint(m_object.containerForRepaint()));
}

} // namespace WebCore