/*
* 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.fonts.truetype;
import java.io.File;
import java.io.IOException;
import java.util.HashMap;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.pentaho.reporting.libraries.fonts.io.FileFontDataInputSource;
import org.pentaho.reporting.libraries.fonts.io.FontDataInputSource;
import org.pentaho.reporting.libraries.fonts.registry.FontContext;
import org.pentaho.reporting.libraries.fonts.registry.FontIdentifier;
import org.pentaho.reporting.libraries.fonts.registry.FontMetrics;
import org.pentaho.reporting.libraries.fonts.registry.FontMetricsFactory;
import org.pentaho.reporting.libraries.fonts.registry.FontType;
/**
* This class is still experimental. At a later time, this class should be refactored to work without file references.
*
* @author Thomas Morgner
*/
public class TrueTypeFontMetricsFactory implements FontMetricsFactory
{
private static final Log logger = LogFactory.getLog(TrueTypeFontMetricsFactory.class);
private HashMap<TrueTypeFontIdentifier, ScalableTrueTypeFontMetrics> fontRecords;
public TrueTypeFontMetricsFactory()
{
this.fontRecords = new HashMap<TrueTypeFontIdentifier, ScalableTrueTypeFontMetrics>();
}
public FontMetrics createMetrics(final FontIdentifier record,
final FontContext context)
{
if (FontType.OPENTYPE.equals(record.getFontType()) == false)
{
throw new IllegalArgumentException
("This identifier does not belong to the OpenType-font system.");
}
final TrueTypeFontIdentifier ttfId = (TrueTypeFontIdentifier) record;
final ScalableTrueTypeFontMetrics fromCache =
(ScalableTrueTypeFontMetrics) fontRecords.get(ttfId);
if (fromCache != null)
{
return new TrueTypeFontMetrics(ttfId, fromCache, context.getFontSize());
}
try
{
final String fontSource = ttfId.getFontSource();
final FontDataInputSource fdis =
new FileFontDataInputSource(new File(fontSource));
final TrueTypeFont font = new TrueTypeFont(fdis);
final ScalableTrueTypeFontMetrics fontMetrics =
new ScalableTrueTypeFontMetrics(font);
this.fontRecords.put(ttfId, fontMetrics);
return new TrueTypeFontMetrics(ttfId, fontMetrics, context.getFontSize());
}
catch (IOException e)
{
logger.warn("Unable to read the font.", e);
// todo: We should throw a better exception instead, shouldnt we?
throw new IllegalStateException();
}
}
}