/*
* Copyright 2008 by Kevin Day.
*
* The contents of this file are subject to the Mozilla Public License Version 1.1
* (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.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the License.
*
* The Original Code is 'iText, a free JAVA-PDF library'.
*
* The Initial Developer of the Original Code is Bruno Lowagie. Portions created by
* the Initial Developer are Copyright (C) 1999-2008 by Bruno Lowagie.
* All Rights Reserved.
* Co-Developer of the code is Paulo Soares. Portions created by the Co-Developer
* are Copyright (C) 2000-2008 by Paulo Soares. All Rights Reserved.
*
* Contributor(s): all the names of the contributors are added in the source code
* where applicable.
*
* Alternatively, the contents of this file may be used under the terms of the
* LGPL license (the "GNU LIBRARY GENERAL PUBLIC LICENSE"), in which case the
* provisions of LGPL are applicable instead of those above. If you wish to
* allow use of your version of this file only under the terms of the LGPL
* License and not to allow others to use your version of this file under
* the MPL, indicate your decision by deleting the provisions above and
* replace them with the notice and other provisions required by the LGPL.
* If you do not delete the provisions above, a recipient may use your version
* of this file under either the MPL or the GNU LIBRARY GENERAL PUBLIC LICENSE.
*
* This library is free software; you can redistribute it and/or modify it
* under the terms of the MPL as stated above or under the terms of the GNU
* Library General Public License as published by the Free Software Foundation;
* either version 2 of the License, or 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 Library general Public License for more
* details.
*
* If you didn't download this code from the following link, you should check if
* you aren't using an obsolete version:
* http://www.lowagie.com/iText/
*/
package com.lowagie.text.pdf;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import com.lowagie.text.pdf.fonts.cmaps.CMap;
import com.lowagie.text.pdf.fonts.cmaps.CMapParser;
/**
* Implementation of DocumentFont used while parsing PDF streams.
* @since 2.1.4
*/
public class CMapAwareDocumentFont extends DocumentFont {
/** The font dictionary. */
private PdfDictionary fontDic;
/** CMap instance. */
private CMap cmap;
/**
* Creates an instance of a CMapAwareFont based on an indirect reference to a font.
* @param refFont the indirect reference to a font
*/
public CMapAwareDocumentFont(PRIndirectReference refFont) {
super(refFont);
fontDic = (PdfDictionary)PdfReader.getPdfObjectRelease(refFont);
processToUni();
}
/**
* Does some processing if the font dictionary indicates that the font is in unicode.
*/
private void processToUni(){
PdfObject toUni = fontDic.get(PdfName.TOUNICODE);
if (toUni == null)
return;
try {
byte[] cmapBytes = PdfReader.getStreamBytes((PRStream)PdfReader.getPdfObjectRelease(toUni));
CMapParser cmapParser = new CMapParser();
cmap = cmapParser.parse(new ByteArrayInputStream(cmapBytes));
} catch (IOException e) {
throw new Error("Unable to obtain cmap - " + e.getMessage(), e);
}
}
/**
* Encodes bytes to a String.
* @param bytes the bytes from a stream
* @param offset an offset
* @param len a length
* @return a String encoded taking into account if the bytes are in unicode or not.
*/
public String encode(byte[] bytes, int offset, int len){
if (cmap != null){
if (len > bytes.length)
System.out.println("Length problem...");
return cmap.lookup(bytes, offset, len);
}
if (len == 1)
return new String(bytes, offset, 1);
throw new Error("Multi-byte glyphs not implemented yet");
}
}