Source/core/rendering/SubtreeLayoutScope.cpp

/*
 * Copyright (C) 2013 Google 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 "config.h"
#include "core/rendering/SubtreeLayoutScope.h"

#include "core/frame/FrameView.h"
#include "core/rendering/RenderObject.h"

namespace blink {

SubtreeLayoutScope::SubtreeLayoutScope(RenderObject& root)
    : m_root(root)
{
    RELEASE_ASSERT(m_root.document().view()->isInPerformLayout());
}

SubtreeLayoutScope::~SubtreeLayoutScope()
{
    RELEASE_ASSERT(!m_root.needsLayout());

#if ENABLE(ASSERT)
    for (HashSet<RenderObject*>::iterator it = m_renderersToLayout.begin(); it != m_renderersToLayout.end(); ++it)
        (*it)->assertRendererLaidOut();
#endif
}

void SubtreeLayoutScope::setNeedsLayout(RenderObject* descendant)
{
    ASSERT(descendant->isDescendantOf(&m_root));
    descendant->setNeedsLayoutAndFullPaintInvalidation(MarkContainingBlockChain, this);
}

void SubtreeLayoutScope::setChildNeedsLayout(RenderObject* descendant)
{
    ASSERT(descendant->isDescendantOf(&m_root));
    descendant->setChildNeedsLayout(MarkContainingBlockChain, this);
}

void SubtreeLayoutScope::addRendererToLayout(RenderObject* renderer)
{
#if ENABLE(ASSERT)
    m_renderersToLayout.add(renderer);
#endif
}

}