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 "third_party/blink/renderer/core/xml/xpath_util.h"
28
29 #include "third_party/blink/renderer/core/dom/container_node.h"
30 #include "third_party/blink/renderer/core/dom/node_traversal.h"
31 #include "third_party/blink/renderer/platform/wtf/text/string_builder.h"
32
33 namespace blink {
34 namespace xpath {
35
IsRootDomNode(Node * node)36 bool IsRootDomNode(Node* node) {
37 return node && !node->parentNode();
38 }
39
StringValue(Node * node)40 String StringValue(Node* node) {
41 switch (node->getNodeType()) {
42 case Node::kAttributeNode:
43 case Node::kProcessingInstructionNode:
44 case Node::kCommentNode:
45 case Node::kTextNode:
46 case Node::kCdataSectionNode:
47 return node->nodeValue();
48 default:
49 if (IsRootDomNode(node) || node->IsElementNode()) {
50 StringBuilder result;
51 result.ReserveCapacity(1024);
52
53 for (Node& n : NodeTraversal::DescendantsOf(*node)) {
54 if (n.IsTextNode()) {
55 const String& node_value = n.nodeValue();
56 result.Append(node_value);
57 }
58 }
59
60 return result.ToString();
61 }
62 }
63
64 return String();
65 }
66
IsValidContextNode(Node * node)67 bool IsValidContextNode(Node* node) {
68 if (!node)
69 return false;
70 switch (node->getNodeType()) {
71 case Node::kAttributeNode:
72 case Node::kTextNode:
73 case Node::kCdataSectionNode:
74 case Node::kCommentNode:
75 case Node::kDocumentNode:
76 case Node::kElementNode:
77 case Node::kProcessingInstructionNode:
78 return true;
79 case Node::kDocumentFragmentNode:
80 case Node::kDocumentTypeNode:
81 return false;
82 }
83 NOTREACHED();
84 return false;
85 }
86
IsXMLSpace(UChar ch)87 bool IsXMLSpace(UChar ch) {
88 return ch <= 0x20 && (ch == 0x20 || ch == 0x09 || ch == 0x0D || ch == 0x0A);
89 }
90
91 } // namespace xpath
92 } // namespace blink
93