text: /*
   * Copyright (C) 2005, 2008 Apple Inc. All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   * 1. Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer.
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in the
   *    documentation and/or other materials provided with the distribution.
   *
   * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
   * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
   * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
   * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
   * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
   * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
   * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
   * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
   * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
   */
  
  #include "config.h"
  #include "SetNodeAttributeCommand.h"
  
  #include "Element.h"
  #include <wtf/Assertions.h>
  
  namespace WebCore {
  
  SetNodeAttributeCommand::SetNodeAttributeCommand(PassRefPtr<Element> element, 
          const QualifiedName& attribute, const AtomicString& value)
      : SimpleEditCommand(element->document())
      , m_element(element)
      , m_attribute(attribute)
      , m_value(value)
  {
      ASSERT(m_element);
  }
  
  void SetNodeAttributeCommand::doApply()
  {
      m_oldValue = m_element->getAttribute(m_attribute);
      m_element->setAttribute(m_attribute, m_value);
  }
  
  void SetNodeAttributeCommand::doUnapply()
  {
      m_element->setAttribute(m_attribute, m_oldValue);
      AtomicStringImpl* nullString = 0;
      m_oldValue = nullString;
  }
  
  } // namespace WebCore
  