Source/core/css/analyzer/DescendantInvalidationSet.cpp

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#include "config.h"
#include "core/css/analyzer/DescendantInvalidationSet.h"

#include "core/css/resolver/StyleResolver.h"
#include "core/dom/Element.h"

namespace WebCore {

DescendantInvalidationSet::DescendantInvalidationSet()
    : m_allDescendantsMightBeInvalid(false)
{
}

void DescendantInvalidationSet::combine(const DescendantInvalidationSet& other)
{
    m_allDescendantsMightBeInvalid = m_allDescendantsMightBeInvalid || other.m_allDescendantsMightBeInvalid;
    // No longer bother combining data structures, since the whole subtree is deemed invalid.
    if (m_allDescendantsMightBeInvalid)
        return;

    HashSet<AtomicString>::const_iterator end = other.m_classes.end();
    for (HashSet<AtomicString>::const_iterator it = other.m_classes.begin(); it != end; ++it)
        addClass(*it);

    end = other.m_ids.end();
    for (HashSet<AtomicString>::const_iterator it = other.m_ids.begin(); it != end; ++it)
        addId(*it);

    end = other.m_tagNames.end();
    for (HashSet<AtomicString>::const_iterator it = other.m_tagNames.begin(); it != end; ++it)
        addTagName(*it);
}

void DescendantInvalidationSet::addClass(const AtomicString& className)
{
    m_classes.add(className);
}

void DescendantInvalidationSet::addId(const AtomicString& id)
{
    m_ids.add(id);
}

void DescendantInvalidationSet::addTagName(const AtomicString& tagName)
{
    m_tagNames.add(tagName);
}

void DescendantInvalidationSet::getClasses(Vector<AtomicString>& classes)
{
    for (HashSet<AtomicString>::const_iterator it = m_classes.begin(); it != m_classes.end(); ++it)
        classes.append(*it);
}

} // namespace WebCore