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 

    34 namespace WebCore {

    35 namespace XPath {

    36         

    37 bool isRootDomNode(Node* node)

    38 {

    39     return node && !node->parentNode();

    40 }

    41 

    42 String stringValue(Node* node)

    43 {

    44     switch (node->nodeType()) {

    45         case Node::ATTRIBUTE_NODE:

    46         case Node::PROCESSING_INSTRUCTION_NODE:

    47         case Node::COMMENT_NODE:

    48         case Node::TEXT_NODE:

    49         case Node::CDATA_SECTION_NODE:

    50         case Node::XPATH_NAMESPACE_NODE:

    51             return node->nodeValue();

    52         default:

    53             if (isRootDomNode(node) || node->nodeType() == Node::ELEMENT_NODE) {

    54                 Vector<UChar> result;

    55                 result.reserveCapacity(1024);

    56 

    57                 for (Node* n = node->firstChild(); n; n = n->traverseNextNode(node)) {

    58                     if (n->isTextNode()) {

    59                         const String& nodeValue = n->nodeValue();

    60                         result.append(nodeValue.characters(), nodeValue.length());

    61                     }

    62                 }

    63 

    64                 return String::adopt(result);

    65             }

    66     }

    67     

    68     return String();

    69 }

    70 

    71 bool isValidContextNode(Node* node)

    72 {

    73     if (!node)

    74         return false;

    75     switch (node->nodeType()) {

    76         case Node::ATTRIBUTE_NODE:

    77         case Node::CDATA_SECTION_NODE:

    78         case Node::COMMENT_NODE:

    79         case Node::DOCUMENT_NODE:

    80         case Node::ELEMENT_NODE:

    81         case Node::PROCESSING_INSTRUCTION_NODE:

    82         case Node::XPATH_NAMESPACE_NODE:

    83             return true;

    84         case Node::DOCUMENT_FRAGMENT_NODE:

    85         case Node::DOCUMENT_TYPE_NODE:

    86         case Node::ENTITY_NODE:

    87         case Node::ENTITY_REFERENCE_NODE:

    88         case Node::NOTATION_NODE:

    89             return false;

    90         case Node::TEXT_NODE:

    91             return !(node->parentNode() && node->parentNode()->isAttributeNode());

    92     }

    93     ASSERT_NOT_REACHED();

    94     return false;

    95 }

    96 

    97 }

    98 }

    99 

   100 #endif // ENABLE(XPATH)