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/v8/ExceptionStatePlaceholder.h"
     35 #include "core/HTMLNames.h"
     36 
     37 namespace WebCore {
     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     ScriptWrappable::init(this);
     46 }
     47 
     48 PassRefPtrWillBeRawPtr<HTMLOutputElement> HTMLOutputElement::create(Document& document, HTMLFormElement* form)
     49 {
     50     return adoptRefWillBeNoop(new HTMLOutputElement(document, form));
     51 }
     52 
     53 const AtomicString& HTMLOutputElement::formControlType() const
     54 {
     55     DEFINE_STATIC_LOCAL(const AtomicString, output, ("output", AtomicString::ConstructFromLiteral));
     56     return output;
     57 }
     58 
     59 bool HTMLOutputElement::supportsFocus() const
     60 {
     61     return HTMLElement::supportsFocus();
     62 }
     63 
     64 void HTMLOutputElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
     65 {
     66     if (name == HTMLNames::forAttr)
     67         setFor(value);
     68     else
     69         HTMLFormControlElement::parseAttribute(name, value);
     70 }
     71 
     72 DOMSettableTokenList* HTMLOutputElement::htmlFor() const
     73 {
     74     return m_tokens.get();
     75 }
     76 
     77 void HTMLOutputElement::setFor(const AtomicString& value)
     78 {
     79     m_tokens->setValue(value);
     80 }
     81 
     82 void HTMLOutputElement::childrenChanged(bool createdByParser, Node* beforeChange, Node* afterChange, int childCountDelta)
     83 {
     84     HTMLFormControlElement::childrenChanged(createdByParser, beforeChange, afterChange, childCountDelta);
     85 
     86     if (m_isDefaultValueMode)
     87         m_defaultValue = textContent();
     88 }
     89 
     90 void HTMLOutputElement::resetImpl()
     91 {
     92     // The reset algorithm for output elements is to set the element's
     93     // value mode flag to "default" and then to set the element's textContent
     94     // attribute to the default value.
     95     if (m_defaultValue == value())
     96         return;
     97     setTextContent(m_defaultValue);
     98     m_isDefaultValueMode = true;
     99 }
    100 
    101 String HTMLOutputElement::value() const
    102 {
    103     return textContent();
    104 }
    105 
    106 void HTMLOutputElement::setValue(const String& value)
    107 {
    108     // The value mode flag set to "value" when the value attribute is set.
    109     m_isDefaultValueMode = false;
    110     if (value == this->value())
    111         return;
    112     setTextContent(value);
    113 }
    114 
    115 String HTMLOutputElement::defaultValue() const
    116 {
    117     return m_defaultValue;
    118 }
    119 
    120 void HTMLOutputElement::setDefaultValue(const String& value)
    121 {
    122     if (m_defaultValue == value)
    123         return;
    124     m_defaultValue = value;
    125     // The spec requires the value attribute set to the default value
    126     // when the element's value mode flag to "default".
    127     if (m_isDefaultValueMode)
    128         setTextContent(value);
    129 }
    130 
    131 
    132 void HTMLOutputElement::trace(Visitor* visitor)
    133 {
    134     visitor->trace(m_tokens);
    135     HTMLFormControlElement::trace(visitor);
    136 }
    137 
    138 } // namespace
    139