xref: /external/webkit/Source/WebCore/html/HTMLOutputElement.cpp

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 * Copyright (c) 2010 Google Inc. All rights reserved.
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 * modification, are permitted provided that the following conditions are
 * met:
 *
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 * notice, this list of conditions and the following disclaimer.
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 * in the documentation and/or other materials provided with the
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 * this software without specific prior written permission.
 *
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#include "config.h"
#include "HTMLOutputElement.h"

#include "HTMLFormElement.h"
#include "HTMLNames.h"

namespace WebCore {

inline HTMLOutputElement::HTMLOutputElement(const QualifiedName& tagName, Document* document, HTMLFormElement* form)
    : HTMLFormControlElement(tagName, document, form)
    , m_isDefaultValueMode(true)
    , m_isSetTextContentInProgress(false)
    , m_defaultValue("")
    , m_tokens(DOMSettableTokenList::create())
{
}

PassRefPtr<HTMLOutputElement> HTMLOutputElement::create(const QualifiedName& tagName, Document* document, HTMLFormElement* form)
{
    return adoptRef(new HTMLOutputElement(tagName, document, form));
}

const AtomicString& HTMLOutputElement::formControlType() const
{
    DEFINE_STATIC_LOCAL(const AtomicString, output, ("output"));
    return output;
}

void HTMLOutputElement::parseMappedAttribute(Attribute* attr)
{
    if (attr->name() == HTMLNames::forAttr)
        setFor(attr->value());
    else
        HTMLFormControlElement::parseMappedAttribute(attr);
}

DOMSettableTokenList* HTMLOutputElement::htmlFor() const
{
    return m_tokens.get();
}

void HTMLOutputElement::setFor(const String& value)
{
    m_tokens->setValue(value);
}

void HTMLOutputElement::childrenChanged(bool createdByParser, Node* beforeChange, Node* afterChange, int childCountDelta)
{
    if (createdByParser || m_isSetTextContentInProgress) {
        m_isSetTextContentInProgress = false;
        return;
    }

    if (m_isDefaultValueMode)
        m_defaultValue = textContent();
    HTMLFormControlElement::childrenChanged(createdByParser, beforeChange, afterChange, childCountDelta);
}

void HTMLOutputElement::reset()
{
    // The reset algorithm for output elements is to set the element's
    // value mode flag to "default" and then to set the element's textContent
    // attribute to the default value.
    m_isDefaultValueMode = true;
    if (m_defaultValue == value())
        return;
    setTextContentInternal(m_defaultValue);
}

String HTMLOutputElement::value() const
{
    return textContent();
}

void HTMLOutputElement::setValue(const String& value)
{
    // The value mode flag set to "value" when the value attribute is set.
    m_isDefaultValueMode = false;
    if (value == this->value())
        return;
    setTextContentInternal(value);
}

String HTMLOutputElement::defaultValue() const
{
    return m_defaultValue;
}

void HTMLOutputElement::setDefaultValue(const String& value)
{
    if (m_defaultValue == value)
        return;
    m_defaultValue = value;
    // The spec requires the value attribute set to the default value
    // when the element's value mode flag to "default".
    if (m_isDefaultValueMode)
        setTextContentInternal(value);
}

void HTMLOutputElement::setTextContentInternal(const String& value)
{
    ASSERT(!m_isSetTextContentInProgress);
    ExceptionCode ec;
    m_isSetTextContentInProgress = true;
    setTextContent(value, ec);
}

} // namespace