/**
* ===========================================
* 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 3524 2007-10-16 11:26:31Z tmorgner $
* ------------
* (C) Copyright 2006-2007, by Pentaho Corporation.
*/
package org.jfree.layouting.layouter.style.resolver.computed.fonts;
import org.jfree.layouting.LayoutProcess;
import org.jfree.layouting.LibLayoutBoot;
import org.jfree.layouting.input.style.StyleKey;
import org.jfree.layouting.input.style.keys.font.FontSizeConstant;
import org.jfree.layouting.input.style.keys.font.RelativeFontSize;
import org.jfree.layouting.input.style.values.CSSConstant;
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.LayoutContext;
import org.jfree.layouting.layouter.model.LayoutElement;
import org.jfree.layouting.layouter.style.resolver.computed.ConstantsResolveHandler;
/**
* Creation-Date: 18.12.2005, 17:03:15
*
* @author Thomas Morgner
*/
public class FontSizeResolveHandler extends ConstantsResolveHandler
{
private static final String SIZE_FACTOR_PREFIX =
"org.jfree.layouting.defaults.FontSizeFactor.";
private double fontSize;
private CSSNumericValue[] predefinedSizes;
private double[] predefinedScalingFactors;
public FontSizeResolveHandler()
{
fontSize = parseDouble("org.jfree.layouting.defaults.FontSize", 12);
predefinedSizes = new CSSNumericValue[7];
predefinedSizes[0] = computePredefinedSize(FontSizeConstant.XX_SMALL);
predefinedSizes[1] = computePredefinedSize(FontSizeConstant.X_SMALL);
predefinedSizes[2] = computePredefinedSize(FontSizeConstant.SMALL);
predefinedSizes[3] = computePredefinedSize(FontSizeConstant.MEDIUM);
predefinedSizes[4] = computePredefinedSize(FontSizeConstant.LARGE);
predefinedSizes[5] = computePredefinedSize(FontSizeConstant.X_LARGE);
predefinedSizes[6] = computePredefinedSize(FontSizeConstant.XX_LARGE);
predefinedScalingFactors = new double[7];
predefinedScalingFactors[0] = computePredefinedScalingFactor(FontSizeConstant.XX_SMALL);
predefinedScalingFactors[1] = computePredefinedScalingFactor(FontSizeConstant.X_SMALL);
predefinedScalingFactors[2] = computePredefinedScalingFactor(FontSizeConstant.SMALL);
predefinedScalingFactors[3] = computePredefinedScalingFactor(FontSizeConstant.MEDIUM);
predefinedScalingFactors[4] = computePredefinedScalingFactor(FontSizeConstant.LARGE);
predefinedScalingFactors[5] = computePredefinedScalingFactor(FontSizeConstant.X_LARGE);
predefinedScalingFactors[6] = computePredefinedScalingFactor(FontSizeConstant.XX_LARGE);
addValue(FontSizeConstant.XX_SMALL, predefinedSizes[0]);
addValue(FontSizeConstant.X_SMALL, predefinedSizes[1]);
addValue(FontSizeConstant.SMALL, predefinedSizes[2]);
addValue(FontSizeConstant.MEDIUM, predefinedSizes[3]);
addValue(FontSizeConstant.LARGE, predefinedSizes[4]);
addValue(FontSizeConstant.X_LARGE, predefinedSizes[5]);
addValue(FontSizeConstant.XX_LARGE, predefinedSizes[6]);
}
private CSSNumericValue computePredefinedSize(final CSSConstant c)
{
final String key = SIZE_FACTOR_PREFIX + c.getCSSText();
final double scaling = parseDouble(key, 100);
return CSSNumericValue.createValue(CSSNumericType.PT, fontSize * scaling / 100d);
}
private double computePredefinedScalingFactor(final CSSConstant c)
{
final String key = SIZE_FACTOR_PREFIX + c.getCSSText();
return parseDouble(key, 100);
}
private double parseDouble(final String configKey, final double defaultValue)
{
final String value = LibLayoutBoot.getInstance().getGlobalConfig()
.getConfigProperty(configKey);
if (value == null)
{
return defaultValue;
}
try
{
return Double.parseDouble(value);
}
catch (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];
}
/**
* Resolves a single property.
*
* @param currentNode
* @param style
*/
public void resolve(final LayoutProcess process,
final LayoutElement currentNode,
final StyleKey key)
{
final LayoutContext layoutContext = currentNode.getLayoutContext();
final CSSValue value = layoutContext.getValue(key);
if (value instanceof CSSConstant == false)
{
// fine, we're done here ...
return;
}
final CSSConstant constant = (CSSConstant) value;
final LayoutElement parent = currentNode.getParent();
if (parent != null)
{
final double parentFontSize =
parent.getLayoutContext().getFontSpecification().getFontSize();
if (RelativeFontSize.LARGER.equals(value))
{
final double scaleFactor = getScaleLargerFactor(parentFontSize);
layoutContext.setValue(key, CSSNumericValue.createValue(CSSNumericType.PERCENTAGE, scaleFactor));
return;
}
if (RelativeFontSize.SMALLER.equals(value))
{
final double scaleFactor = getScaleSmallerFactor(parentFontSize);
layoutContext.setValue(key, CSSNumericValue.createValue(CSSNumericType.PERCENTAGE, scaleFactor));
return;
}
}
else
{
// we might not have a parent, but that won't stop us ..
if (RelativeFontSize.LARGER.equals(value))
{
layoutContext.setValue(key, CSSNumericValue.createValue(CSSNumericType.PERCENTAGE, 120));
return ;
}
if (RelativeFontSize.SMALLER.equals(value))
{
layoutContext.setValue(key, CSSNumericValue.createValue(CSSNumericType.PERCENTAGE, 85));
return;
}
}
final CSSValue resolvedValue = lookupValue(constant);
if (resolvedValue != null)
{
layoutContext.setValue(key, resolvedValue);
return;
}
// do not change the font size..
layoutContext.setValue(key, CSSNumericValue.createValue(CSSNumericType.PERCENTAGE, 100));
}
public double getScaleLargerFactor(final double parentSize)
{
for (int i = 0; i < predefinedSizes.length; i++)
{
final CSSNumericValue size = predefinedSizes[i];
if (parentSize < size.getValue())
{
return predefinedScalingFactors[i];
}
}
return predefinedScalingFactors[6];
}
public double getScaleSmallerFactor(final double parentSize)
{
for (int i = predefinedSizes.length; i >= 0; i--)
{
final CSSNumericValue size = predefinedSizes[i];
if (parentSize > size.getValue())
{
return predefinedScalingFactors[i];
}
}
return predefinedScalingFactors[0];
}
}