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      1 /*
      2  * Copyright (C) 2005, 2008 Apple 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
      6  * are met:
      7  * 1. Redistributions of source code must retain the above copyright
      8  *    notice, this list of conditions and the following disclaimer.
      9  * 2. Redistributions in binary form must reproduce the above copyright
     10  *    notice, this list of conditions and the following disclaimer in the
     11  *    documentation and/or other materials provided with the distribution.
     12  *
     13  * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
     14  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     16  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
     17  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
     18  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
     19  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
     20  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
     21  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     23  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     24  */
     25 
     26 #include "config.h"
     27 #include "SetNodeAttributeCommand.h"
     28 
     29 #include "Element.h"
     30 #include <wtf/Assertions.h>
     31 
     32 namespace WebCore {
     33 
     34 SetNodeAttributeCommand::SetNodeAttributeCommand(PassRefPtr<Element> element,
     35         const QualifiedName& attribute, const AtomicString& value)
     36     : SimpleEditCommand(element->document())
     37     , m_element(element)
     38     , m_attribute(attribute)
     39     , m_value(value)
     40 {
     41     ASSERT(m_element);
     42 }
     43 
     44 void SetNodeAttributeCommand::doApply()
     45 {
     46     m_oldValue = m_element->getAttribute(m_attribute);
     47     m_element->setAttribute(m_attribute, m_value);
     48 }
     49 
     50 void SetNodeAttributeCommand::doUnapply()
     51 {
     52     m_element->setAttribute(m_attribute, m_oldValue);
     53     AtomicStringImpl* nullString = 0;
     54     m_oldValue = nullString;
     55 }
     56 
     57 } // namespace WebCore
     58