third_party/WebKit/Source/core/html/HTMLOutputElement.cpp

   1 /*
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   4  * Redistribution and use in source and binary forms, with or without
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   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
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  15  * contributors may be used to endorse or promote products derived from
  16  * this software without specific prior written permission.
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  20  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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  28  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  29  */
  30
  31 #include "config.h"
  32 #include "core/html/HTMLOutputElement.h"
  33
  34 #include "bindings/core/v8/ExceptionStatePlaceholder.h"
  35 #include "core/HTMLNames.h"
  36
  37 namespace blink {
  38
  39 inline HTMLOutputElement::HTMLOutputElement(Document& document, HTMLFormElement* form)
  40     : HTMLFormControlElement(HTMLNames::outputTag, document, form)
  41     , m_isDefaultValueMode(true)
  42     , m_defaultValue("")
  43     , m_tokens(DOMSettableTokenList::create())
  44 {
  45 }
  46
  47 PassRefPtrWillBeRawPtr<HTMLOutputElement> HTMLOutputElement::create(Document& document, HTMLFormElement* form)
  48 {
  49     return adoptRefWillBeNoop(new HTMLOutputElement(document, form));
  50 }
  51
  52 const AtomicString& HTMLOutputElement::formControlType() const
  53 {
  54     DEFINE_STATIC_LOCAL(const AtomicString, output, ("output", AtomicString::ConstructFromLiteral));
  55     return output;
  56 }
  57
  58 bool HTMLOutputElement::supportsFocus() const
  59 {
  60     return HTMLElement::supportsFocus();
  61 }
  62
  63 void HTMLOutputElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
  64 {
  65     if (name == HTMLNames::forAttr)
  66         setFor(value);
  67     else
  68         HTMLFormControlElement::parseAttribute(name, value);
  69 }
  70
  71 DOMSettableTokenList* HTMLOutputElement::htmlFor() const
  72 {
  73     return m_tokens.get();
  74 }
  75
  76 void HTMLOutputElement::setFor(const AtomicString& value)
  77 {
  78     m_tokens->setValue(value);
  79 }
  80
  81 void HTMLOutputElement::childrenChanged(const ChildrenChange& change)
  82 {
  83     HTMLFormControlElement::childrenChanged(change);
  84
  85     if (m_isDefaultValueMode)
  86         m_defaultValue = textContent();
  87 }
  88
  89 void HTMLOutputElement::resetImpl()
  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     if (m_defaultValue == value())
  95         return;
  96     setTextContent(m_defaultValue);
  97     m_isDefaultValueMode = true;
  98 }
  99
 100 String HTMLOutputElement::value() const
 101 {
 102     return textContent();
 103 }
 104
 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     setTextContent(value);
 112 }
 113
 114 String HTMLOutputElement::defaultValue() const
 115 {
 116     return m_defaultValue;
 117 }
 118
 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         setTextContent(value);
 128 }
 129
 130
 131 DEFINE_TRACE(HTMLOutputElement)
 132 {
 133     visitor->trace(m_tokens);
 134     HTMLFormControlElement::trace(visitor);
 135 }
 136
 137 } // namespace