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The Apache PDFBox library is an open source Java tool for working with PDF documents.
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.pdfbox.pdmodel.font;
import java.awt.Font;
import java.io.IOException;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.pdfbox.cos.COSArray;
import org.apache.pdfbox.cos.COSDictionary;
import org.apache.pdfbox.cos.COSName;
import org.apache.pdfbox.pdmodel.common.PDRectangle;
/**
* This is implementation of the Type0 Font. See PDFBOX-605
* for the related improvement issue.
*
* @author Ben Litchfield
* @version $Revision: 1.9 $
*/
public class PDType0Font extends PDSimpleFont
{
/**
* Log instance.
*/
private static final Log LOG = LogFactory.getLog(PDType0Font.class);
private COSArray descendantFontArray;
private PDFont descendantFont;
private COSDictionary descendantFontDictionary;
private Font awtFont;
/**
* Constructor.
*/
public PDType0Font()
{
super();
font.setItem(COSName.SUBTYPE, COSName.TYPE0);
}
/**
* Constructor.
*
* @param fontDictionary The font dictionary according to the PDF
* specification.
*/
public PDType0Font(COSDictionary fontDictionary)
{
super(fontDictionary);
descendantFontDictionary = (COSDictionary) getDescendantFonts().getObject(0);
if (descendantFontDictionary != null)
{
try
{
descendantFont = PDFontFactory.createFont(descendantFontDictionary);
}
catch (IOException exception)
{
LOG.error("Error while creating the descendant font!");
}
}
}
/**
* {@inheritDoc}
*/
@Override
public Font getawtFont() throws IOException
{
if (awtFont == null)
{
if (descendantFont != null)
{
awtFont = ((PDSimpleFont) descendantFont).getawtFont();
if (awtFont != null)
{
setIsFontSubstituted(((PDSimpleFont) descendantFont).isFontSubstituted());
/*
* Fix Oracle JVM Crashes.
* Tested with Oracle JRE 6.0_45-b06 and 7.0_21-b11
*/
awtFont.canDisplay(1);
}
}
if (awtFont == null)
{
awtFont = FontManager.getStandardFont();
LOG.info("Using font " + awtFont.getName()
+ " instead of " + descendantFont.getFontDescriptor().getFontName());
setIsFontSubstituted(true);
}
}
return awtFont;
}
/**
* This will get the fonts bounding box.
*
* @return The fonts bounding box.
*
* @throws IOException If there is an error getting the bounding box.
*/
@Override
public PDRectangle getFontBoundingBox() throws IOException
{
throw new RuntimeException("Not yet implemented");
}
/**
* This will get the font width for a character.
*
* @param c The character code to get the width for.
* @param offset The offset into the array.
* @param length The length of the data.
*
* @return The width is in 1000 unit of text space, ie 333 or 777
*
* @throws IOException If an error occurs while parsing.
*/
public float getFontWidth(byte[] c, int offset, int length) throws IOException
{
return descendantFont.getFontWidth(c, offset, length);
}
/**
* This will get the font height for a character.
*
* @param c The character code to get the height for.
* @param offset The offset into the array.
* @param length The length of the data.
*
* @return The width is in 1000 unit of text space, ie 333 or 777
*
* @throws IOException If an error occurs while parsing.
*/
@Override
public float getFontHeight(byte[] c, int offset, int length) throws IOException
{
return descendantFont.getFontHeight(c, offset, length);
}
/**
* This will get the average font width for all characters.
*
* @return The width is in 1000 unit of text space, ie 333 or 777
*
* @throws IOException If an error occurs while parsing.
*/
@Override
public float getAverageFontWidth() throws IOException
{
return descendantFont.getAverageFontWidth();
}
private COSArray getDescendantFonts()
{
if (descendantFontArray == null)
{
descendantFontArray = (COSArray) font.getDictionaryObject(COSName.DESCENDANT_FONTS);
}
return descendantFontArray;
}
/**
* {@inheritDoc}
*/
@Override
public float getFontWidth(int charCode)
{
return descendantFont.getFontWidth(charCode);
}
@Override
public String encode(byte[] c, int offset, int length) throws IOException
{
String retval = null;
if (hasToUnicode())
{
retval = super.encode(c, offset, length);
}
if (retval == null)
{
int result = cmap.lookupCID(c, offset, length);
if (result != -1)
{
retval = descendantFont.cmapEncoding(result, 2, true, null);
}
}
return retval;
}
/**
*
* Provides the descendant font.
*
* @return the descendant font.
*
*/
public PDFont getDescendantFont()
{
return descendantFont;
}
@Override
public void clear()
{
super.clear();
descendantFontArray = null;
if (descendantFont != null)
{
descendantFont.clear();
descendantFont = null;
}
descendantFontDictionary = null;
}
}