/**
* ===========================================
* LibLayout : a free Java layouting library
* ===========================================
*
* Project Info: http://reporting.pentaho.org/liblayout/
*
* (C) Copyright 2006-2007, by Pentaho Corporation and Contributors.
*
* This library is free software; you can redistribute it and/or modify it under the terms
* of the GNU Lesser General Public License as published by the Free Software Foundation;
* either version 2.1 of the License, or (at your option) any later version.
*
* This library 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.
*
* You should have received a copy of the GNU Lesser General Public License along with this
* library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
* Boston, MA 02111-1307, USA.
*
* [Java is a trademark or registered trademark of Sun Microsystems, Inc.
* in the United States and other countries.]
*
* ------------
* $Id: CounterIncrementResolveHandler.java,v 1.10 2007/04/02 11:41:14 taqua Exp $
* ------------
* (C) Copyright 2006-2007, by Pentaho Corporation.
*/
package org.jfree.layouting.layouter.style.resolver.computed.content;
import org.jfree.layouting.LayoutProcess;
import org.jfree.layouting.input.style.StyleKey;
import org.jfree.layouting.input.style.keys.content.ContentStyleKeys;
import org.jfree.layouting.input.style.values.CSSAttrFunction;
import org.jfree.layouting.input.style.values.CSSConstant;
import org.jfree.layouting.input.style.values.CSSNumericValue;
import org.jfree.layouting.input.style.values.CSSValue;
import org.jfree.layouting.input.style.values.CSSValueList;
import org.jfree.layouting.input.style.values.CSSValuePair;
import org.jfree.layouting.layouter.model.LayoutElement;
import org.jfree.layouting.layouter.style.resolver.ResolveHandler;
public class CounterIncrementResolveHandler implements ResolveHandler
{
public CounterIncrementResolveHandler ()
{
}
/**
* This indirectly defines the resolve order. The higher the order, the more dependent
* is the resolver on other resolvers to be complete.
*
* @return the array of required style keys.
*/
public StyleKey[] getRequiredStyles ()
{
return new StyleKey[] {
ContentStyleKeys.COUNTER_RESET,
};
}
/**
* Resolves a single property.
*
* @param currentNode
* @param style
*/
public void resolve (final LayoutProcess process,
final LayoutElement element,
final StyleKey key)
{
final CSSValue value = element.getLayoutContext().getValue(key);
if (value instanceof CSSValueList == false)
{
return; // do nothing.
}
final CSSValueList valueList = (CSSValueList) value;
for (int i = 0; i < valueList.getLength(); i++)
{
final CSSValue item = valueList.getItem(i);
if (item instanceof CSSValuePair == false)
{
continue;
}
CSSValuePair counter = (CSSValuePair) item;
final CSSValue counterName = counter.getFirstValue();
if (counterName instanceof CSSConstant == false)
{
continue;
}
final CSSValue counterValue = counter.getSecondValue();
final int counterIntValue = parseCounterValue(counterValue, element);
element.incrementCounter(counterName.getCSSText(), counterIntValue);
}
}
private int parseCounterValue (final CSSValue rawValue,
final LayoutElement element)
{
if (rawValue instanceof CSSNumericValue)
{
final CSSNumericValue nval = (CSSNumericValue) rawValue;
return (int) nval.getValue();
}
if (rawValue instanceof CSSAttrFunction)
{
final CSSAttrFunction attrFunction = (CSSAttrFunction) rawValue;
final String attrName = attrFunction.getName();
final String attrNamespace = attrFunction.getNamespace();
final Object rawAttribute =
element.getLayoutContext().getAttributes().getAttribute
(attrNamespace, attrName);
if (rawAttribute instanceof Number)
{
final Number nAttr = (Number) rawAttribute;
return nAttr.intValue();
}
}
return 0;
}
}