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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 
     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 
     48 PassRefPtr<HTMLOutputElement> HTMLOutputElement::create(const QualifiedName& tagName, Document* document, HTMLFormElement* form)
     49 {
     50     return adoptRef(new HTMLOutputElement(tagName, document, form));
     51 }
     52 
     53 const AtomicString& HTMLOutputElement::formControlType() const
     54 {
     55     DEFINE_STATIC_LOCAL(const AtomicString, output, ("output"));
     56     return output;
     57 }
     58 
     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 
     67 DOMSettableTokenList* HTMLOutputElement::htmlFor() const
     68 {
     69     return m_tokens.get();
     70 }
     71 
     72 void HTMLOutputElement::setFor(const String& value)
     73 {
     74     m_tokens->setValue(value);
     75 }
     76 
     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 
     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 
    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     setTextContentInternal(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         setTextContentInternal(value);
    128 }
    129 
    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