/*
Copyright 2009-2010 Stefano Chizzolini. http://www.pdfclown.org
Contributors:
* Stefano Chizzolini (original code developer, http://www.stefanochizzolini.it)
This file should be part of the source code distribution of "PDF Clown library"
(the Program): see the accompanying README files for more info.
This Program 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 3 of the License, or (at your option) any later version.
This Program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY,
either expressed or implied; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the License for more details.
You should have received a copy of the GNU Lesser General Public License along with this
Program (see README files); if not, go to the GNU website (http://www.gnu.org/licenses/).
Redistribution and use, with or without modification, are permitted provided that such
redistributions retain the above copyright notice, license and disclaimer, along with
this list of conditions.
*/
package org.pdfclown.documents.contents.fonts;
import org.pdfclown.bytes.IInputStream;
import org.pdfclown.util.ByteArray;
import java.io.EOFException;
import java.util.Hashtable;
import java.util.Map;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
/**
Type 1 font parser.
@author Stefano Chizzolini (http://www.stefanochizzolini.it)
@since 0.0.8
@version 0.1.0
*/
final class PfbParser
{
private IInputStream stream;
PfbParser(
IInputStream stream
)
{this.stream = stream;}
/**
Parses the character-code-to-unicode mapping [PDF:1.6:5.9.1].
*/
public Map<ByteArray,Integer> parse(
)
{
Hashtable<ByteArray,Integer> codes = new Hashtable<ByteArray,Integer>();
String line;
Pattern linePattern = Pattern.compile("(\\S+)\\s+(.+)");
try
{
while((line = stream.readLine()) != null)
{
Matcher lineMatcher = linePattern.matcher(line);
if(!lineMatcher.find())
continue;
String key = lineMatcher.group(1);
if(key.equals("/Encoding"))
{
// Skip to the encoding array entries!
stream.readLine();
String encodingLine;
Pattern encodingLinePattern = Pattern.compile("dup (\\S+) (\\S+) put");
while((encodingLine = stream.readLine()) != null)
{
Matcher encodingLineMatcher = encodingLinePattern.matcher(encodingLine);
if(!encodingLineMatcher.find())
break;
byte[] inputCode = new byte[]{(byte)Integer.parseInt(encodingLineMatcher.group(1))};
String name = encodingLineMatcher.group(2).substring(1);
codes.put(new ByteArray(inputCode),GlyphMapping.nameToCode(name));
}
break;
}
}
}
catch(EOFException e)
{/* TODO: eof on readline? consider readline==null!!! */}
catch(Exception e)
{throw new RuntimeException(e);}
return codes;
}
}