8d3cba79ebccdfae43872dccc6d7ed3000a903bd
[WebKit-https.git] / 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 #include "ContainerNode.h"
31 #include "TextNodeTraversal.h"
32 #include <wtf/text/StringBuilder.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->isElementNode())
54                 return TextNodeTraversal::contentsAsString(node);
55     }
56     return String();
57 }
58
59 bool isValidContextNode(Node* node)
60 {
61     if (!node)
62         return false;
63     switch (node->nodeType()) {
64         case Node::ATTRIBUTE_NODE:
65         case Node::CDATA_SECTION_NODE:
66         case Node::COMMENT_NODE:
67         case Node::DOCUMENT_NODE:
68         case Node::ELEMENT_NODE:
69         case Node::PROCESSING_INSTRUCTION_NODE:
70         case Node::XPATH_NAMESPACE_NODE:
71             return true;
72         case Node::DOCUMENT_FRAGMENT_NODE:
73         case Node::DOCUMENT_TYPE_NODE:
74         case Node::ENTITY_NODE:
75         case Node::ENTITY_REFERENCE_NODE:
76         case Node::NOTATION_NODE:
77             return false;
78         case Node::TEXT_NODE:
79             return !(node->parentNode() && node->parentNode()->isAttributeNode());
80     }
81     ASSERT_NOT_REACHED();
82     return false;
83 }
84
85 }
86 }