root/Source/core/css/invalidation/DescendantInvalidationSet.cpp

DEFINITIONS

1. m_customPseudoInvalid
2. combine
3. ensureClassSet
4. ensureIdSet
5. ensureTagNameSet
6. ensureAttributeSet
7. addClass
8. addId
9. addTagName
10. addAttribute
11. getClasses
12. getAttributes
13. getIds
14. getTagNames
15. setWholeSubtreeInvalid

/*
 * Copyright (C) 2014 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.
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 * 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,
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 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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#include "config.h"
#include "core/css/invalidation/DescendantInvalidationSet.h"

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

namespace WebCore {

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

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

    if (other.wholeSubtreeInvalid()) {
        setWholeSubtreeInvalid();
        return;
    }

    if (other.customPseudoInvalid())
        setCustomPseudoInvalid();

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

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

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

    if (other.m_attributes) {
        HashSet<AtomicString>::const_iterator end = other.m_attributes->end();
        for (HashSet<AtomicString>::const_iterator it = other.m_attributes->begin(); it != end; ++it)
            addAttribute(*it);
    }
}

HashSet<AtomicString>& DescendantInvalidationSet::ensureClassSet()
{
    if (!m_classes)
        m_classes = adoptPtr(new HashSet<AtomicString>);
    return *m_classes;
}

HashSet<AtomicString>& DescendantInvalidationSet::ensureIdSet()
{
    if (!m_ids)
        m_ids = adoptPtr(new HashSet<AtomicString>);
    return *m_ids;
}

HashSet<AtomicString>& DescendantInvalidationSet::ensureTagNameSet()
{
    if (!m_tagNames)
        m_tagNames = adoptPtr(new HashSet<AtomicString>);
    return *m_tagNames;
}

HashSet<AtomicString>& DescendantInvalidationSet::ensureAttributeSet()
{
    if (!m_attributes)
        m_attributes = adoptPtr(new HashSet<AtomicString>);
    return *m_attributes;
}

void DescendantInvalidationSet::addClass(const AtomicString& className)
{
    if (wholeSubtreeInvalid())
        return;
    ensureClassSet().add(className);
}

void DescendantInvalidationSet::addId(const AtomicString& id)
{
    if (wholeSubtreeInvalid())
        return;
    ensureIdSet().add(id);
}

void DescendantInvalidationSet::addTagName(const AtomicString& tagName)
{
    if (wholeSubtreeInvalid())
        return;
    ensureTagNameSet().add(tagName);
}

void DescendantInvalidationSet::addAttribute(const AtomicString& attribute)
{
    if (wholeSubtreeInvalid())
        return;
    ensureAttributeSet().add(attribute);
}

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

void DescendantInvalidationSet::getAttributes(Vector<AtomicString>& attributes) const
{
    if (!m_attributes)
        return;
    for (HashSet<AtomicString>::const_iterator it = m_attributes->begin(); it != m_attributes->end(); ++it)
        attributes.append(*it);
}

void DescendantInvalidationSet::getIds(Vector<AtomicString>& ids) const
{
    if (!m_ids)
        return;
    for (HashSet<AtomicString>::const_iterator it = m_ids->begin(); it != m_ids->end(); ++it)
        ids.append(*it);
}

void DescendantInvalidationSet::getTagNames(Vector<AtomicString>& tagNames) const
{
    if (!m_tagNames)
        return;
    for (HashSet<AtomicString>::const_iterator it = m_tagNames->begin(); it != m_tagNames->end(); ++it)
        tagNames.append(*it);
}

void DescendantInvalidationSet::setWholeSubtreeInvalid()
{
    if (m_allDescendantsMightBeInvalid)
        return;

    m_allDescendantsMightBeInvalid = true;
    m_classes = nullptr;
    m_ids = nullptr;
    m_tagNames = nullptr;
    m_attributes = nullptr;
}

} // namespace WebCore