1 /*
2 * Copyright (C) 2009 Google Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions are
6 * met:
7 *
8 * * Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * * Redistributions in binary form must reproduce the above
11 * copyright notice, this list of conditions and the following disclaimer
12 * in the documentation and/or other materials provided with the
13 * distribution.
14 * * Neither the name of Google Inc. nor the names of its
15 * contributors may be used to endorse or promote products derived from
16 * this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 */
30
31 #include "config.h"
32 #include "DOMUtilitiesPrivate.h"
33
34 #include "Element.h"
35 #include "HTMLInputElement.h"
36 #include "HTMLLinkElement.h"
37 #include "HTMLMetaElement.h"
38 #include "HTMLNames.h"
39 #include "HTMLOptionElement.h"
40 #include "Node.h"
41
42 using namespace WebCore;
43
44 namespace {
45
46 template <class HTMLNodeType>
toHTMLElement(Node * node,const QualifiedName & name)47 HTMLNodeType* toHTMLElement(Node* node, const QualifiedName& name)
48 {
49 if (node->isHTMLElement()
50 && static_cast<HTMLElement*>(node)->hasTagName(name)) {
51 return static_cast<HTMLNodeType*>(node);
52 }
53 return 0;
54 }
55
56 } // namespace
57
58 namespace WebKit {
59
toHTMLInputElement(Node * node)60 HTMLInputElement* toHTMLInputElement(Node* node)
61 {
62 return toHTMLElement<HTMLInputElement>(node, HTMLNames::inputTag);
63 }
64
toHTMLLinkElement(Node * node)65 HTMLLinkElement* toHTMLLinkElement(Node* node)
66 {
67 return toHTMLElement<HTMLLinkElement>(node, HTMLNames::linkTag);
68 }
69
toHTMLMetaElement(Node * node)70 HTMLMetaElement* toHTMLMetaElement(Node* node)
71 {
72 return toHTMLElement<HTMLMetaElement>(node, HTMLNames::metaTag);
73 }
74
toHTMLOptionElement(Node * node)75 HTMLOptionElement* toHTMLOptionElement(Node* node)
76 {
77 return toHTMLElement<HTMLOptionElement>(node, HTMLNames::optionTag);
78 }
79
elementHasLegalLinkAttribute(const Element * element,const QualifiedName & attrName)80 bool elementHasLegalLinkAttribute(const Element* element,
81 const QualifiedName& attrName)
82 {
83 if (attrName == HTMLNames::srcAttr) {
84 // Check src attribute.
85 if (element->hasTagName(HTMLNames::imgTag)
86 || element->hasTagName(HTMLNames::scriptTag)
87 || element->hasTagName(HTMLNames::iframeTag)
88 || element->hasTagName(HTMLNames::frameTag))
89 return true;
90 if (element->hasTagName(HTMLNames::inputTag)) {
91 const HTMLInputElement* input =
92 static_cast<const HTMLInputElement*>(element);
93 if (input->isImageButton())
94 return true;
95 }
96 } else if (attrName == HTMLNames::hrefAttr) {
97 // Check href attribute.
98 if (element->hasTagName(HTMLNames::linkTag)
99 || element->hasTagName(HTMLNames::aTag)
100 || element->hasTagName(HTMLNames::areaTag))
101 return true;
102 } else if (attrName == HTMLNames::actionAttr) {
103 if (element->hasTagName(HTMLNames::formTag))
104 return true;
105 } else if (attrName == HTMLNames::backgroundAttr) {
106 if (element->hasTagName(HTMLNames::bodyTag)
107 || element->hasTagName(HTMLNames::tableTag)
108 || element->hasTagName(HTMLNames::trTag)
109 || element->hasTagName(HTMLNames::tdTag))
110 return true;
111 } else if (attrName == HTMLNames::citeAttr) {
112 if (element->hasTagName(HTMLNames::blockquoteTag)
113 || element->hasTagName(HTMLNames::qTag)
114 || element->hasTagName(HTMLNames::delTag)
115 || element->hasTagName(HTMLNames::insTag))
116 return true;
117 } else if (attrName == HTMLNames::classidAttr
118 || attrName == HTMLNames::dataAttr) {
119 if (element->hasTagName(HTMLNames::objectTag))
120 return true;
121 } else if (attrName == HTMLNames::codebaseAttr) {
122 if (element->hasTagName(HTMLNames::objectTag)
123 || element->hasTagName(HTMLNames::appletTag))
124 return true;
125 }
126 return false;
127 }
128
129 } // namespace WebKit
130