/*
* 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) 2006 - 2013 Pentaho Corporation and Contributors. All rights reserved.
*/
package org.pentaho.reporting.libraries.css.resolver.values.computed.fonts;
import org.pentaho.reporting.libraries.css.LibCssBoot;
import org.pentaho.reporting.libraries.css.StyleSheetUtility;
import org.pentaho.reporting.libraries.css.dom.DocumentContext;
import org.pentaho.reporting.libraries.css.dom.LayoutElement;
import org.pentaho.reporting.libraries.css.dom.LayoutOutputMetaData;
import org.pentaho.reporting.libraries.css.dom.LayoutStyle;
import org.pentaho.reporting.libraries.css.dom.OutputProcessorFeature;
import org.pentaho.reporting.libraries.css.keys.font.FontSizeConstant;
import org.pentaho.reporting.libraries.css.keys.font.FontStyleKeys;
import org.pentaho.reporting.libraries.css.keys.font.RelativeFontSize;
import org.pentaho.reporting.libraries.css.model.StyleKey;
import org.pentaho.reporting.libraries.css.resolver.values.computed.ConstantsResolveHandler;
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;
// todo apply built in defaults instead ...
/**
* Creation-Date: 21.12.2005, 12:47:43
*
* @author Thomas Morgner
*/
public class MinMaxFontSizeResolveHandler extends ConstantsResolveHandler
{
private static final String SIZE_FACTOR_PREFIX =
"org.jfree.layouting.defaults.FontSizeFactor.";
private double fontSize;
private CSSNumericValue[] predefinedSizes;
private double[] predefinedScalingFactors;
public MinMaxFontSizeResolveHandler()
{
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 = LibCssBoot.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[]{
FontStyleKeys.FONT_SIZE
};
}
public void resolve(final DocumentContext process,
final LayoutElement currentNode,
final StyleKey key)
{
final LayoutStyle layoutContext = currentNode.getLayoutStyle();
final CSSValue value = layoutContext.getValue(key);
if (value instanceof CSSConstant == false)
{
// fine, we're done here ...
return;
}
final CSSConstant constant = (CSSConstant) value;
// parent font size has been resolved already. Parent is the resolved font size of this element.
final LayoutOutputMetaData metaData = process.getOutputMetaData();
final int resolution = (int) metaData.getNumericFeatureValue(OutputProcessorFeature.DEVICE_RESOLUTION);
final CSSValue fontSizeValue = currentNode.getLayoutStyle().getValue(FontStyleKeys.FONT_SIZE);
final double fontSize = StyleSheetUtility.convertLengthToDouble(fontSizeValue, resolution);
if (RelativeFontSize.LARGER.equals(value))
{
final double scaleFactor = getScaleLargerFactor(fontSize);
layoutContext.setValue(key, CSSNumericValue.createValue(CSSNumericType.PERCENTAGE, scaleFactor));
}
else if (RelativeFontSize.SMALLER.equals(value))
{
final double scaleFactor = getScaleSmallerFactor(fontSize);
layoutContext.setValue(key, CSSNumericValue.createValue(CSSNumericType.PERCENTAGE, scaleFactor));
}
final CSSValue resolvedValue = lookupValue(constant);
if (resolvedValue != null)
{
layoutContext.setValue(key, resolvedValue);
return;
}
if (key.equals(FontStyleKeys.MAX_FONT_SIZE))
{
// there is no upper limit if the value is invalid
layoutContext.setValue(key, CSSNumericValue.createValue(CSSNumericType.PT, Short.MAX_VALUE));
}
else
{
// there is no lower limit if the value is invalid
layoutContext.setValue(key, CSSNumericValue.createValue(CSSNumericType.PT, 0));
}
}
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];
}
}