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1 /*
2  * Copyright (c) 2010 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 "HTMLOutputElement.h"
33 
34 #include "HTMLFormElement.h"
35 #include "HTMLNames.h"
36 
37 namespace WebCore {
38 
HTMLOutputElement(const QualifiedName & tagName,Document * document,HTMLFormElement * form)39 inline HTMLOutputElement::HTMLOutputElement(const QualifiedName& tagName, Document* document, HTMLFormElement* form)
40     : HTMLFormControlElement(tagName, document, form)
41     , m_isDefaultValueMode(true)
42     , m_isSetTextContentInProgress(false)
43     , m_defaultValue("")
44     , m_tokens(DOMSettableTokenList::create())
45 {
46 }
47 
create(const QualifiedName & tagName,Document * document,HTMLFormElement * form)48 PassRefPtr<HTMLOutputElement> HTMLOutputElement::create(const QualifiedName& tagName, Document* document, HTMLFormElement* form)
49 {
50     return adoptRef(new HTMLOutputElement(tagName, document, form));
51 }
52 
formControlType() const53 const AtomicString& HTMLOutputElement::formControlType() const
54 {
55     DEFINE_STATIC_LOCAL(const AtomicString, output, ("output"));
56     return output;
57 }
58 
parseMappedAttribute(Attribute * attr)59 void HTMLOutputElement::parseMappedAttribute(Attribute* attr)
60 {
61     if (attr->name() == HTMLNames::forAttr)
62         setFor(attr->value());
63     else
64         HTMLFormControlElement::parseMappedAttribute(attr);
65 }
66 
htmlFor() const67 DOMSettableTokenList* HTMLOutputElement::htmlFor() const
68 {
69     return m_tokens.get();
70 }
71 
setFor(const String & value)72 void HTMLOutputElement::setFor(const String& value)
73 {
74     m_tokens->setValue(value);
75 }
76 
childrenChanged(bool createdByParser,Node * beforeChange,Node * afterChange,int childCountDelta)77 void HTMLOutputElement::childrenChanged(bool createdByParser, Node* beforeChange, Node* afterChange, int childCountDelta)
78 {
79     if (createdByParser || m_isSetTextContentInProgress) {
80         m_isSetTextContentInProgress = false;
81         return;
82     }
83 
84     if (m_isDefaultValueMode)
85         m_defaultValue = textContent();
86     HTMLFormControlElement::childrenChanged(createdByParser, beforeChange, afterChange, childCountDelta);
87 }
88 
reset()89 void HTMLOutputElement::reset()
90 {
91     // The reset algorithm for output elements is to set the element's
92     // value mode flag to "default" and then to set the element's textContent
93     // attribute to the default value.
94     m_isDefaultValueMode = true;
95     if (m_defaultValue == value())
96         return;
97     setTextContentInternal(m_defaultValue);
98 }
99 
value() const100 String HTMLOutputElement::value() const
101 {
102     return textContent();
103 }
104 
setValue(const String & value)105 void HTMLOutputElement::setValue(const String& value)
106 {
107     // The value mode flag set to "value" when the value attribute is set.
108     m_isDefaultValueMode = false;
109     if (value == this->value())
110         return;
111     setTextContentInternal(value);
112 }
113 
defaultValue() const114 String HTMLOutputElement::defaultValue() const
115 {
116     return m_defaultValue;
117 }
118 
setDefaultValue(const String & value)119 void HTMLOutputElement::setDefaultValue(const String& value)
120 {
121     if (m_defaultValue == value)
122         return;
123     m_defaultValue = value;
124     // The spec requires the value attribute set to the default value
125     // when the element's value mode flag to "default".
126     if (m_isDefaultValueMode)
127         setTextContentInternal(value);
128 }
129 
setTextContentInternal(const String & value)130 void HTMLOutputElement::setTextContentInternal(const String& value)
131 {
132     ASSERT(!m_isSetTextContentInProgress);
133     ExceptionCode ec;
134     m_isSetTextContentInProgress = true;
135     setTextContent(value, ec);
136 }
137 
138 } // namespace
139