Always enable ENABLE(XPATH)
[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 <wtf/text/StringBuilder.h>
32
33 namespace WebCore {
34 namespace XPath {
35         
36 bool isRootDomNode(Node* node)
37 {
38     return node && !node->parentNode();
39 }
40
41 String stringValue(Node* node)
42 {
43     switch (node->nodeType()) {
44         case Node::ATTRIBUTE_NODE:
45         case Node::PROCESSING_INSTRUCTION_NODE:
46         case Node::COMMENT_NODE:
47         case Node::TEXT_NODE:
48         case Node::CDATA_SECTION_NODE:
49         case Node::XPATH_NAMESPACE_NODE:
50             return node->nodeValue();
51         default:
52             if (isRootDomNode(node) || node->nodeType() == Node::ELEMENT_NODE) {
53                 StringBuilder result;
54                 result.reserveCapacity(1024);
55
56                 for (Node* n = node->firstChild(); n; n = n->traverseNextNode(node)) {
57                     if (n->isTextNode()) {
58                         const String& nodeValue = n->nodeValue();
59                         result.append(nodeValue);
60                     }
61                 }
62
63                 return result.toString();
64             }
65     }
66     
67     return String();
68 }
69
70 bool isValidContextNode(Node* node)
71 {
72     if (!node)
73         return false;
74     switch (node->nodeType()) {
75         case Node::ATTRIBUTE_NODE:
76         case Node::CDATA_SECTION_NODE:
77         case Node::COMMENT_NODE:
78         case Node::DOCUMENT_NODE:
79         case Node::ELEMENT_NODE:
80         case Node::PROCESSING_INSTRUCTION_NODE:
81         case Node::XPATH_NAMESPACE_NODE:
82             return true;
83         case Node::DOCUMENT_FRAGMENT_NODE:
84         case Node::DOCUMENT_TYPE_NODE:
85         case Node::ENTITY_NODE:
86         case Node::ENTITY_REFERENCE_NODE:
87         case Node::NOTATION_NODE:
88         case Node::SHADOW_ROOT_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 }