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      1 /*
      2  * Copyright (C) 2007, 2008 Apple Inc. All rights reserved.
      3  *
      4  * Redistribution and use in source and binary forms, with or without
      5  * modification, are permitted provided that the following conditions
      6  * are met:
      7  *
      8  * 1.  Redistributions of source code must retain the above copyright
      9  *     notice, this list of conditions and the following disclaimer.
     10  * 2.  Redistributions in binary form must reproduce the above copyright
     11  *     notice, this list of conditions and the following disclaimer in the
     12  *     documentation and/or other materials provided with the distribution.
     13  * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of
     14  *     its contributors may be used to endorse or promote products derived
     15  *     from this software without specific prior written permission.
     16  *
     17  * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
     18  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
     19  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
     20  * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
     21  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
     22  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
     23  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
     24  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     26  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     27  */
     28 
     29 #include "config.h"
     30 #include "SelectorNodeList.h"
     31 
     32 #include "CSSSelector.h"
     33 #include "CSSSelectorList.h"
     34 #include "CSSStyleSelector.h"
     35 #include "Document.h"
     36 #include "Element.h"
     37 #include "HTMLNames.h"
     38 
     39 namespace WebCore {
     40 
     41 using namespace HTMLNames;
     42 
     43 PassRefPtr<StaticNodeList> createSelectorNodeList(Node* rootNode, const CSSSelectorList& querySelectorList)
     44 {
     45     Vector<RefPtr<Node> > nodes;
     46     Document* document = rootNode->document();
     47     CSSSelector* onlySelector = querySelectorList.hasOneSelector() ? querySelectorList.first() : 0;
     48     bool strictParsing = !document->inCompatMode();
     49 
     50     CSSStyleSelector::SelectorChecker selectorChecker(document, strictParsing);
     51 
     52     if (strictParsing && rootNode->inDocument() && onlySelector && onlySelector->m_match == CSSSelector::Id && !document->containsMultipleElementsWithId(onlySelector->m_value)) {
     53         Element* element = document->getElementById(onlySelector->m_value);
     54         if (element && (rootNode->isDocumentNode() || element->isDescendantOf(rootNode)) && selectorChecker.checkSelector(onlySelector, element))
     55             nodes.append(element);
     56     } else {
     57         for (Node* n = rootNode->firstChild(); n; n = n->traverseNextNode(rootNode)) {
     58             if (n->isElementNode()) {
     59                 Element* element = static_cast<Element*>(n);
     60                 for (CSSSelector* selector = querySelectorList.first(); selector; selector = CSSSelectorList::next(selector)) {
     61                     if (selectorChecker.checkSelector(selector, element)) {
     62                         nodes.append(n);
     63                         break;
     64                     }
     65                 }
     66             }
     67         }
     68     }
     69 
     70     return StaticNodeList::adopt(nodes);
     71 }
     72 
     73 } // namespace WebCore
     74