WebCore/dom/SelectorNodeList.cpp

/*
 * Copyright (C) 2007, 2008 Apple 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:
 *
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 *     notice, this list of conditions and the following disclaimer.
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 *     its contributors may be used to endorse or promote products derived
 *     from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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#include "config.h"
#include "SelectorNodeList.h"

#include "CSSSelector.h"
#include "CSSSelectorList.h"
#include "CSSStyleSelector.h"
#include "Document.h"
#include "Element.h"
#include "HTMLNames.h"
#include "StaticNodeList.h"

namespace WebCore {

using namespace HTMLNames;

PassRefPtr<StaticNodeList> createSelectorNodeList(Node* rootNode, const CSSSelectorList& querySelectorList)
{
    Vector<RefPtr<Node> > nodes;
    Document* document = rootNode->document();
    CSSSelector* onlySelector = querySelectorList.hasOneSelector() ? querySelectorList.first() : 0;
    bool strictParsing = !document->inQuirksMode();

    CSSStyleSelector::SelectorChecker selectorChecker(document, strictParsing);

    if (strictParsing && rootNode->inDocument() && onlySelector && onlySelector->m_match == CSSSelector::Id && !document->containsMultipleElementsWithId(onlySelector->m_value)) {
        Element* element = document->getElementById(onlySelector->m_value);
        if (element && (rootNode->isDocumentNode() || element->isDescendantOf(rootNode)) && selectorChecker.checkSelector(onlySelector, element))
            nodes.append(element);
    } else {
        for (Node* n = rootNode->firstChild(); n; n = n->traverseNextNode(rootNode)) {
            if (n->isElementNode()) {
                Element* element = static_cast<Element*>(n);
                for (CSSSelector* selector = querySelectorList.first(); selector; selector = CSSSelectorList::next(selector)) {
                    if (selectorChecker.checkSelector(selector, element)) {
                        nodes.append(n);
                        break;
                    }
                }
            }
        }
    }
    
    return StaticNodeList::adopt(nodes);
}

} // namespace WebCore