/*!
* 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.font;
import java.util.HashMap;
import java.util.Map;
import org.pentaho.reporting.libraries.css.keys.font.FontStyleKeys;
import org.pentaho.reporting.libraries.css.keys.line.LineStyleKeys;
import org.pentaho.reporting.libraries.css.model.StyleKey;
import org.pentaho.reporting.libraries.css.parser.CSSCompoundValueReadHandler;
import org.pentaho.reporting.libraries.css.parser.stylehandler.line.LineHeightReadHandler;
import org.pentaho.reporting.libraries.css.values.CSSValue;
import org.w3c.css.sac.LexicalUnit;
/**
* Creation-Date: 28.11.2005, 17:05:01
*
* @author Thomas Morgner
*/
public class FontReadHandler implements CSSCompoundValueReadHandler
{
private FontStyleReadHandler styleReadHandler;
private FontSizeReadHandler sizeReadHandler;
private FontWeightReadHandler weightReadHandler;
private FontVariantReadHandler variantReadHandler;
private LineHeightReadHandler lineHeightReadHandler;
private FontFamilyReadHandler fontFamilyReadHandler;
public FontReadHandler()
{
this.styleReadHandler = new FontStyleReadHandler();
this.sizeReadHandler = new FontSizeReadHandler();
this.weightReadHandler = new FontWeightReadHandler();
this.variantReadHandler = new FontVariantReadHandler();
this.lineHeightReadHandler = new LineHeightReadHandler();
this.fontFamilyReadHandler = new FontFamilyReadHandler();
}
/**
* Parses the LexicalUnit and returns a map of (StyleKey, CSSValue) pairs.
*
* @param unit
* @return
*/
public Map createValues(LexicalUnit unit)
{
// todo we ignore the font-family system font styles for now.
CSSValue fontStyle = styleReadHandler.createValue(null, unit);
if (fontStyle != null)
{
unit = unit.getNextLexicalUnit();
if (unit == null)
{
return null;
}
}
CSSValue fontVariant = variantReadHandler.createValue(null, unit);
if (fontVariant != null)
{
unit = unit.getNextLexicalUnit();
if (unit == null)
{
return null;
}
}
CSSValue fontWeight = weightReadHandler.createValue(null, unit);
if (fontWeight != null)
{
unit = unit.getNextLexicalUnit();
if (unit == null)
{
return null;
}
}
CSSValue fontSize = sizeReadHandler.createValue(null, unit);
if (fontSize == null)
{
return null; // required value is missing
}
unit = unit.getNextLexicalUnit();
if (unit == null)
{
return null; // font family missing
}
CSSValue lineHeight = null;
if (unit.getLexicalUnitType() == LexicalUnit.SAC_OPERATOR_SLASH)
{
unit = unit.getNextLexicalUnit();
if (unit == null)
{
return null;
}
lineHeight = lineHeightReadHandler.createValue(null, unit);
if (lineHeight == null)
{
return null; // required sequence missing
}
unit = unit.getNextLexicalUnit();
if (unit == null)
{
return null;
}
}
CSSValue fontFamily = fontFamilyReadHandler.createValue(null, unit);
if (fontFamily == null)
{
return null; // font family is required!
}
Map map = new HashMap();
map.put(FontStyleKeys.FONT_FAMILY, fontFamily);
map.put(FontStyleKeys.FONT_SIZE, fontSize);
if (lineHeight != null)
{
map.put(LineStyleKeys.LINE_HEIGHT, lineHeight);
}
if (fontWeight != null)
{
map.put(FontStyleKeys.FONT_WEIGHT, fontWeight);
}
if (fontVariant != null)
{
map.put(FontStyleKeys.FONT_VARIANT, fontVariant);
}
if (fontStyle != null)
{
map.put(FontStyleKeys.FONT_STYLE, fontStyle);
}
return map;
}
public StyleKey[] getAffectedKeys()
{
return new StyleKey[]{
FontStyleKeys.FONT_FAMILY,
FontStyleKeys.FONT_SIZE,
FontStyleKeys.FONT_WEIGHT,
FontStyleKeys.FONT_VARIANT,
FontStyleKeys.FONT_STYLE,
LineStyleKeys.LINE_HEIGHT
};
}
}