code.vuplus.com Git - vuplus_webkit/blob - Source/WebCore/xml/XPathUtil.cpp

   1 /*
   2  * Copyright (C) 2005 Frerich Raabe <raabe@kde.org>
   3  * Copyright (C) 2006, 2009 Apple Inc.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  *
   9  * 1. Redistributions of source code must retain the above copyright
  10  *    notice, this list of conditions and the following disclaimer.
  11  * 2. Redistributions in binary form must reproduce the above copyright
  12  *    notice, this list of conditions and the following disclaimer in the
  13  *    documentation and/or other materials provided with the distribution.
  14  *
  15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  16  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  17  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  18  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  19  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  20  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  21  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  22  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  23  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  24  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  25  */
  26
  27 #include "config.h"
  28 #include "XPathUtil.h"
  29
  30 #if ENABLE(XPATH)
  31
  32 #include "ContainerNode.h"
  33 #include <wtf/text/StringBuilder.h>
  34
  35 namespace WebCore {
  36 namespace XPath {
  37
  38 bool isRootDomNode(Node* node)
  39 {
  40     return node && !node->parentNode();
  41 }
  42
  43 String stringValue(Node* node)
  44 {
  45     switch (node->nodeType()) {
  46         case Node::ATTRIBUTE_NODE:
  47         case Node::PROCESSING_INSTRUCTION_NODE:
  48         case Node::COMMENT_NODE:
  49         case Node::TEXT_NODE:
  50         case Node::CDATA_SECTION_NODE:
  51         case Node::XPATH_NAMESPACE_NODE:
  52             return node->nodeValue();
  53         default:
  54             if (isRootDomNode(node) || node->nodeType() == Node::ELEMENT_NODE) {
  55                 StringBuilder result;
  56                 result.reserveCapacity(1024);
  57
  58                 for (Node* n = node->firstChild(); n; n = n->traverseNextNode(node)) {
  59                     if (n->isTextNode()) {
  60                         const String& nodeValue = n->nodeValue();
  61                         result.append(nodeValue);
  62                     }
  63                 }
  64
  65                 return result.toString();
  66             }
  67     }
  68
  69     return String();
  70 }
  71
  72 bool isValidContextNode(Node* node)
  73 {
  74     if (!node)
  75         return false;
  76     switch (node->nodeType()) {
  77         case Node::ATTRIBUTE_NODE:
  78         case Node::CDATA_SECTION_NODE:
  79         case Node::COMMENT_NODE:
  80         case Node::DOCUMENT_NODE:
  81         case Node::ELEMENT_NODE:
  82         case Node::PROCESSING_INSTRUCTION_NODE:
  83         case Node::XPATH_NAMESPACE_NODE:
  84             return true;
  85         case Node::DOCUMENT_FRAGMENT_NODE:
  86         case Node::DOCUMENT_TYPE_NODE:
  87         case Node::ENTITY_NODE:
  88         case Node::ENTITY_REFERENCE_NODE:
  89         case Node::NOTATION_NODE:
  90         case Node::SHADOW_ROOT_NODE:
  91             return false;
  92         case Node::TEXT_NODE:
  93             return !(node->parentNode() && node->parentNode()->isAttributeNode());
  94     }
  95     ASSERT_NOT_REACHED();
  96     return false;
  97 }
  98
  99 }
 100 }
 101
 102 #endif // ENABLE(XPATH)