WebCore/editing/RemoveCSSPropertyCommand.cpp

/*
 * Copyright (C) 2005 Apple Computer, 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 "RemoveCSSPropertyCommand.h"

#include "CSSMutableStyleDeclaration.h"
#include <wtf/Assertions.h>

namespace WebCore {

RemoveCSSPropertyCommand::RemoveCSSPropertyCommand(Document* document, CSSStyleDeclaration* decl, int property)
    : EditCommand(document)
    , m_decl(decl->makeMutable())
    , m_property(property)
    , m_important(false)
{
    ASSERT(m_decl);
}

RemoveCSSPropertyCommand::~RemoveCSSPropertyCommand()
{
}

void RemoveCSSPropertyCommand::doApply()
{
    ASSERT(m_decl);

    m_oldValue = m_decl->getPropertyValue(m_property);
    ASSERT(!m_oldValue.isNull());

    m_important = m_decl->getPropertyPriority(m_property);
    m_decl->removeProperty(m_property);
}

void RemoveCSSPropertyCommand::doUnapply()
{
    ASSERT(m_decl);
    ASSERT(!m_oldValue.isNull());

    m_decl->setProperty(m_property, m_oldValue, m_important);
}

} // namespace WebCore