/*!
* 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.text;
import java.util.HashMap;
import java.util.Map;
import org.pentaho.reporting.libraries.css.keys.text.TextStyleKeys;
import org.pentaho.reporting.libraries.css.model.StyleKey;
import org.pentaho.reporting.libraries.css.parser.CSSCompoundValueReadHandler;
import org.pentaho.reporting.libraries.css.parser.CSSValueFactory;
import org.pentaho.reporting.libraries.css.values.CSSConstant;
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.w3c.css.sac.LexicalUnit;
/**
* Creation-Date: 24.05.2006, 15:13:13
*
* @author Thomas Morgner
*/
public abstract class SpacingLimitReadHandler implements CSSCompoundValueReadHandler
{
public static final CSSConstant NORMAL = new CSSConstant("normal");
/**
* Parses the LexicalUnit and returns a map of (StyleKey, CSSValue) pairs.
*
* @param unit
* @return
*/
public Map createValues(LexicalUnit unit)
{
CSSValue optimum = parseSingleSpacingValue(unit);
if (optimum == null)
{
return null;
}
unit = unit.getNextLexicalUnit();
CSSValue minimum = parseSingleSpacingValue(unit);
if (minimum != null)
{
unit = unit.getNextLexicalUnit();
}
CSSValue maximum = parseSingleSpacingValue(unit);
final Map map = new HashMap();
map.put(getMinimumKey(), minimum);
map.put(TextStyleKeys.X_MAX_LETTER_SPACING, maximum);
map.put(TextStyleKeys.X_OPTIMUM_LETTER_SPACING, optimum);
return map;
}
protected abstract StyleKey getMinimumKey();
protected abstract StyleKey getMaximumKey();
protected abstract StyleKey getOptimumKey();
private CSSValue parseSingleSpacingValue(final LexicalUnit value)
{
if (value == null)
{
return null;
}
if (value.getLexicalUnitType() == LexicalUnit.SAC_IDENT)
{
if (value.getStringValue().equalsIgnoreCase("normal"))
{
return SpacingLimitReadHandler.NORMAL;
}
return null;
}
if (value.getLexicalUnitType() == LexicalUnit.SAC_PERCENTAGE)
{
return CSSNumericValue.createValue(CSSNumericType.PERCENTAGE,
value.getFloatValue());
}
return CSSValueFactory.createLengthValue(value);
}
public StyleKey[] getAffectedKeys()
{
return new StyleKey[]{getMinimumKey(), getMaximumKey(), getOptimumKey()};
}
}