/**
* ===========================================
* 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: FontSizeResolveHandler.java,v 1.10 2007/04/02 11:41:15 taqua Exp $
* ------------
* (C) Copyright 2006-2007, by Pentaho Corporation.
*/
package org.jfree.layouting.layouter.style.resolver.percentages.fonts;
import org.jfree.fonts.LibFontsDefaults;
import org.jfree.layouting.LayoutProcess;
import org.jfree.layouting.LibLayoutBoot;
import org.jfree.layouting.input.style.StyleKey;
import org.jfree.layouting.input.style.values.CSSNumericType;
import org.jfree.layouting.input.style.values.CSSNumericValue;
import org.jfree.layouting.input.style.values.CSSValue;
import org.jfree.layouting.layouter.context.FontSpecification;
import org.jfree.layouting.layouter.context.LayoutContext;
import org.jfree.layouting.layouter.model.LayoutElement;
import org.jfree.layouting.layouter.style.CSSValueResolverUtility;
import org.jfree.layouting.layouter.style.resolver.ResolveHandler;
/**
* Creation-Date: 18.12.2005, 18:06:23
*
* @author Thomas Morgner
*/
public class FontSizeResolveHandler implements ResolveHandler
{
private double baseFontSize;
public FontSizeResolveHandler()
{
baseFontSize = parseDouble ("org.jfree.layouting.defaults.FontSize", 12);
}
private double parseDouble(final String configKey,
final double defaultValue)
{
final LibLayoutBoot boot = LibLayoutBoot.getInstance();
final String value =
boot.getGlobalConfig().getConfigProperty(configKey);
if (value == null)
{
return defaultValue;
}
try
{
return Double.parseDouble(value);
}
catch (final NumberFormatException nfe)
{
return defaultValue;
}
}
/**
* This indirectly defines the resolve order. The higher the order, the more
* dependent is the resolver on other resolvers to be complete.
*
* @return
*/
public StyleKey[] getRequiredStyles()
{
return new StyleKey[0];
}
public void resolve(final LayoutProcess process,
final LayoutElement currentNode,
final StyleKey key)
{
final LayoutContext layoutContext = currentNode.getLayoutContext();
final CSSValue value = layoutContext.getValue(key);
final LayoutElement parent = currentNode.getParent();
final FontSpecification fontSpecification =
currentNode.getLayoutContext().getFontSpecification();
if (value instanceof CSSNumericValue == false)
{
if (parent == null)
{
fontSpecification.setFontSize(this.baseFontSize);
layoutContext.setValue(key, CSSNumericValue.createValue(CSSNumericType.PT, baseFontSize));
}
else
{
final LayoutContext parentContext = parent.getLayoutContext();
final FontSpecification parentFont = parentContext.getFontSpecification();
final double fontSize = parentFont.getFontSize();
fontSpecification.setFontSize(fontSize);
layoutContext.setValue(key, CSSNumericValue.createValue(CSSNumericType.PT, fontSize));
}
return;
}
final CSSNumericValue nval = (CSSNumericValue) value;
if (CSSValueResolverUtility.isAbsoluteValue(nval))
{
final CSSNumericValue fsize = CSSValueResolverUtility.convertLength
(nval, currentNode.getLayoutContext(), process.getOutputMetaData());
final double fontSize = fsize.getValue();
fontSpecification.setFontSize(fontSize);
layoutContext.setValue(key, CSSNumericValue.createValue(CSSNumericType.PT, fontSize));
}
// we encountered one of the relative values.
else if (CSSNumericType.EM.equals(nval.getType()))
{
final double parentSize;
if (parent == null)
{
parentSize = this.baseFontSize;
}
else
{
final LayoutContext parentContext = parent.getLayoutContext();
final FontSpecification parentFont = parentContext.getFontSpecification();
parentSize = parentFont.getFontSize();
}
final double fontSize = parentSize * nval.getValue();
fontSpecification.setFontSize(fontSize);
layoutContext.setValue(key, CSSNumericValue.createValue(CSSNumericType.PT, fontSize));
}
else if (CSSNumericType.EX.equals(nval.getType()))
{
final double parentSize;
if (parent == null)
{
// if we have no parent, we create a fixed default value.
parentSize = this.baseFontSize * LibFontsDefaults.DEFAULT_XHEIGHT_SIZE / LibFontsDefaults.DEFAULT_ASCENT_SIZE;
}
else
{
final LayoutContext parentContext = parent.getLayoutContext();
final FontSpecification parentFont = parentContext.getFontSpecification();
parentSize = parentFont.getFontSize();
}
final double fontSize = parentSize * nval.getValue();
layoutContext.setValue(key, CSSNumericValue.createValue(CSSNumericType.PT, fontSize));
fontSpecification.setFontSize(fontSize);
}
else if (CSSNumericType.PERCENTAGE.equals(nval.getType()))
{
final double parentSize;
if (parent == null)
{
// if we have no parent, we create a fixed default value.
parentSize = this.baseFontSize;
}
else
{
final LayoutContext parentContext = parent.getLayoutContext();
final FontSpecification parentFont = parentContext.getFontSpecification();
parentSize = parentFont.getFontSize();
}
final double fontSize = parentSize * nval.getValue() / 100.0d;
fontSpecification.setFontSize(fontSize);
layoutContext.setValue(key, CSSNumericValue.createValue(CSSNumericType.PT, fontSize));
}
else
{
fontSpecification.setFontSize(this.baseFontSize);
layoutContext.setValue(key, CSSNumericValue.createValue(CSSNumericType.PT, this.baseFontSize));
}
}
}