/**
* ===========================================
* 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: FontReadHandler.java 3524 2007-10-16 11:26:31Z tmorgner $
* ------------
* (C) Copyright 2006-2007, by Pentaho Corporation.
*/
package org.jfree.layouting.input.style.parser.stylehandler.font;
import java.util.HashMap;
import java.util.Map;
import org.jfree.layouting.input.style.StyleKey;
import org.jfree.layouting.input.style.keys.font.FontStyleKeys;
import org.jfree.layouting.input.style.keys.line.LineStyleKeys;
import org.jfree.layouting.input.style.parser.CSSCompoundValueReadHandler;
import org.jfree.layouting.input.style.parser.stylehandler.line.LineHeightReadHandler;
import org.jfree.layouting.input.style.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.
final CSSValue fontStyle = styleReadHandler.createValue(null, unit);
if (fontStyle != null)
{
unit = unit.getNextLexicalUnit();
if (unit == null)
{
return null;
}
}
final CSSValue fontVariant = variantReadHandler.createValue(null, unit);
if (fontVariant != null)
{
unit = unit.getNextLexicalUnit();
if (unit == null)
{
return null;
}
}
final CSSValue fontWeight = weightReadHandler.createValue(null, unit);
if (fontWeight != null)
{
unit = unit.getNextLexicalUnit();
if (unit == null)
{
return null;
}
}
final 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;
}
}
final CSSValue fontFamily = fontFamilyReadHandler.createValue(null, unit);
if (fontFamily == null)
{
return null; // font family is required!
}
final 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
};
}
}