Home | History | Annotate | Download | only in html 
      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 "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 void HTMLOutputElement::trace(Visitor* visitor)
    132 {
    133     visitor->trace(m_tokens);
    134     HTMLFormControlElement::trace(visitor);
    135 }
    136 
    137 } // namespace
    138