/*!
* This program is free software; you can redistribute it and/or modify it under the
* terms of the GNU Lesser General Public License, version 2.1 as published by the Free Software
* Foundation.
*
* You should have received a copy of the GNU Lesser General Public License along with this
* program; if not, you can obtain a copy at http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html
* or from the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
* This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
* without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
* See the GNU Lesser General Public License for more details.
*
* Copyright (c) 2002-2013 Pentaho Corporation.. All rights reserved.
*/
package org.pentaho.reporting.libraries.css.parser.stylehandler.box;
import org.pentaho.reporting.libraries.css.model.StyleKey;
import org.pentaho.reporting.libraries.css.parser.CSSValueFactory;
import org.pentaho.reporting.libraries.css.parser.stylehandler.OneOfConstantsReadHandler;
import org.pentaho.reporting.libraries.css.values.CSSAutoValue;
import org.pentaho.reporting.libraries.css.values.CSSNumericType;
import org.pentaho.reporting.libraries.css.values.CSSNumericValue;
import org.pentaho.reporting.libraries.css.values.CSSValue;
import org.pentaho.reporting.libraries.css.values.CSSValuePair;
import org.w3c.css.sac.LexicalUnit;
/**
* Creation-Date: 27.11.2005, 21:48:44
*
* @author Thomas Morgner
*/
public class FitPositionReadHandler extends OneOfConstantsReadHandler
{
public static final CSSNumericValue CENTER =
CSSNumericValue.createValue(CSSNumericType.PERCENTAGE, 50);
public static final CSSNumericValue TOP =
CSSNumericValue.createValue(CSSNumericType.PERCENTAGE, 0);
public static final CSSNumericValue LEFT =
CSSNumericValue.createValue(CSSNumericType.PERCENTAGE, 0);
public static final CSSNumericValue BOTTOM =
CSSNumericValue.createValue(CSSNumericType.PERCENTAGE, 100);
public static final CSSNumericValue RIGHT =
CSSNumericValue.createValue(CSSNumericType.PERCENTAGE, 100);
public FitPositionReadHandler()
{
super(false);
}
public CSSValue createValue(StyleKey name, LexicalUnit value)
{
if (value.getLexicalUnitType() == LexicalUnit.SAC_IDENT)
{
final String stringValue = value.getStringValue();
if (stringValue.equalsIgnoreCase("auto"))
{
return CSSAutoValue.getInstance();
}
}
final CSSValue firstPosition = parseFirstPosition(value);
if (firstPosition == null)
{
return null;
}
value = value.getNextLexicalUnit();
final CSSValue secondPosition = parseSecondPosition(value, firstPosition);
if (secondPosition == null)
{
return null;
}
return createResultList(firstPosition, secondPosition);
}
protected CSSValue parseFirstPosition(final LexicalUnit value)
{
if (value == null)
{
return null;
}
if (value.getLexicalUnitType() == LexicalUnit.SAC_IDENT)
{
if ("left".equalsIgnoreCase(value.getStringValue()))
{
return LEFT;
}
else if ("center".equalsIgnoreCase(value.getStringValue()))
{
return CENTER;
}
else if ("right".equalsIgnoreCase(value.getStringValue()))
{
return RIGHT;
}
else if ("top".equalsIgnoreCase(value.getStringValue()))
{
return TOP;
}
else if ("bottom".equalsIgnoreCase(value.getStringValue()))
{
return BOTTOM;
}
// ignore this rule.
return null;
}
if (value.getLexicalUnitType() == LexicalUnit.SAC_PERCENTAGE)
{
return CSSNumericValue.createValue(CSSNumericType.PERCENTAGE,
value.getFloatValue());
}
if (CSSValueFactory.isLengthValue(value))
{
return CSSValueFactory.createLengthValue(value);
}
// contains errors, we ignore this rule.
return null;
}
protected CSSValuePair createResultList(CSSValue firstPosition,
CSSValue secondPosition)
{
if (firstPosition == TOP || firstPosition == BOTTOM)
{
return new CSSValuePair(secondPosition, firstPosition);
}
else if (secondPosition == LEFT || secondPosition == RIGHT)
{
return new CSSValuePair(secondPosition, firstPosition);
}
else
{
return new CSSValuePair(firstPosition, secondPosition);
}
}
protected CSSValue parseSecondPosition(final LexicalUnit value,
final CSSValue firstValue)
{
if (value == null)
{
return CENTER;
}
if (value.getLexicalUnitType() == LexicalUnit.SAC_IDENT)
{
if ("left".equalsIgnoreCase(value.getStringValue()))
{
return LEFT;
}
else if ("center".equalsIgnoreCase(value.getStringValue()))
{
return CENTER;
}
else if ("right".equalsIgnoreCase(value.getStringValue()))
{
return RIGHT;
}
else if ("top".equalsIgnoreCase(value.getStringValue()))
{
return TOP;
}
else if ("bottom".equalsIgnoreCase(value.getStringValue()))
{
return BOTTOM;
}
return null; // ignore this rule, it contains errors.
}
if (value.getLexicalUnitType() == LexicalUnit.SAC_PERCENTAGE)
{
return CSSNumericValue.createValue(CSSNumericType.PERCENTAGE,
value.getFloatValue());
}
else if (CSSValueFactory.isLengthValue(value))
{
return CSSValueFactory.createLengthValue(value);
}
return CENTER;
}
}