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iText, a free Java-PDF library
/*
* $Id: FontDetails.java 3427 2008-05-24 18:32:31Z xlv $
*
* Copyright 2001, 2002 by Paulo Soares.
*
* 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, 2000, 2001, 2002 by Bruno Lowagie.
* All Rights Reserved.
* Co-Developer of the code is Paulo Soares. Portions created by the Co-Developer
* are Copyright (C) 2000, 2001, 2002 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.UnsupportedEncodingException;
import java.util.HashMap;
import com.lowagie.text.ExceptionConverter;
import com.lowagie.text.Utilities;
/** Each font in the document will have an instance of this class
* where the characters used will be represented.
*
* @author Paulo Soares ([email protected])
*/
class FontDetails {
/** The indirect reference to this font
*/
PdfIndirectReference indirectReference;
/** The font name that appears in the document body stream
*/
PdfName fontName;
/** The font
*/
BaseFont baseFont;
/** The font if its an instance of TrueTypeFontUnicode
*/
TrueTypeFontUnicode ttu;
CJKFont cjkFont;
/** The array used with single byte encodings
*/
byte shortTag[];
/** The map used with double byte encodings. The key is Integer(glyph) and the
* value is int[]{glyph, width, Unicode code}
*/
HashMap longTag;
IntHashtable cjkTag;
/** The font type
*/
int fontType;
/** true if the font is symbolic
*/
boolean symbolic;
/** Indicates if all the glyphs and widths for that particular
* encoding should be included in the document.
*/
protected boolean subset = true;
/** Each font used in a document has an instance of this class.
* This class stores the characters used in the document and other
* specifics unique to the current working document.
* @param fontName the font name
* @param indirectReference the indirect reference to the font
* @param baseFont the BaseFont
*/
FontDetails(PdfName fontName, PdfIndirectReference indirectReference, BaseFont baseFont) {
this.fontName = fontName;
this.indirectReference = indirectReference;
this.baseFont = baseFont;
fontType = baseFont.getFontType();
switch (fontType) {
case BaseFont.FONT_TYPE_T1:
case BaseFont.FONT_TYPE_TT:
shortTag = new byte[256];
break;
case BaseFont.FONT_TYPE_CJK:
cjkTag = new IntHashtable();
cjkFont = (CJKFont)baseFont;
break;
case BaseFont.FONT_TYPE_TTUNI:
longTag = new HashMap();
ttu = (TrueTypeFontUnicode)baseFont;
symbolic = baseFont.isFontSpecific();
break;
}
}
/** Gets the indirect reference to this font.
* @return the indirect reference to this font
*/
PdfIndirectReference getIndirectReference() {
return indirectReference;
}
/** Gets the font name as it appears in the document body.
* @return the font name
*/
PdfName getFontName() {
return fontName;
}
/** Gets the BaseFont of this font.
* @return the BaseFont of this font
*/
BaseFont getBaseFont() {
return baseFont;
}
/** Converts the text into bytes to be placed in the document.
* The conversion is done according to the font and the encoding and the characters
* used are stored.
* @param text the text to convert
* @return the conversion
*/
byte[] convertToBytes(String text) {
byte b[] = null;
switch (fontType) {
case BaseFont.FONT_TYPE_T3:
return baseFont.convertToBytes(text);
case BaseFont.FONT_TYPE_T1:
case BaseFont.FONT_TYPE_TT: {
b = baseFont.convertToBytes(text);
int len = b.length;
for (int k = 0; k < len; ++k)
shortTag[b[k] & 0xff] = 1;
break;
}
case BaseFont.FONT_TYPE_CJK: {
int len = text.length();
for (int k = 0; k < len; ++k)
cjkTag.put(cjkFont.getCidCode(text.charAt(k)), 0);
b = baseFont.convertToBytes(text);
break;
}
case BaseFont.FONT_TYPE_DOCUMENT: {
b = baseFont.convertToBytes(text);
break;
}
case BaseFont.FONT_TYPE_TTUNI: {
try {
int len = text.length();
int metrics[] = null;
char glyph[] = new char[len];
int i = 0;
if (symbolic) {
b = PdfEncodings.convertToBytes(text, "symboltt");
len = b.length;
for (int k = 0; k < len; ++k) {
metrics = ttu.getMetricsTT(b[k] & 0xff);
if (metrics == null)
continue;
longTag.put(new Integer(metrics[0]), new int[]{metrics[0], metrics[1], ttu.getUnicodeDifferences(b[k] & 0xff)});
glyph[i++] = (char)metrics[0];
}
}
else {
for (int k = 0; k < len; ++k) {
int val;
if (Utilities.isSurrogatePair(text, k)) {
val = Utilities.convertToUtf32(text, k);
k++;
}
else {
val = text.charAt(k);
}
metrics = ttu.getMetricsTT(val);
if (metrics == null)
continue;
int m0 = metrics[0];
Integer gl = new Integer(m0);
if (!longTag.containsKey(gl))
longTag.put(gl, new int[]{m0, metrics[1], val});
glyph[i++] = (char)m0;
}
}
String s = new String(glyph, 0, i);
b = s.getBytes(CJKFont.CJK_ENCODING);
}
catch (UnsupportedEncodingException e) {
throw new ExceptionConverter(e);
}
break;
}
}
return b;
}
/** Writes the font definition to the document.
* @param writer the PdfWriter of this document
*/
void writeFont(PdfWriter writer) {
try {
switch (fontType) {
case BaseFont.FONT_TYPE_T3:
baseFont.writeFont(writer, indirectReference, null);
break;
case BaseFont.FONT_TYPE_T1:
case BaseFont.FONT_TYPE_TT: {
int firstChar;
int lastChar;
for (firstChar = 0; firstChar < 256; ++firstChar) {
if (shortTag[firstChar] != 0)
break;
}
for (lastChar = 255; lastChar >= firstChar; --lastChar) {
if (shortTag[lastChar] != 0)
break;
}
if (firstChar > 255) {
firstChar = 255;
lastChar = 255;
}
baseFont.writeFont(writer, indirectReference, new Object[]{new Integer(firstChar), new Integer(lastChar), shortTag, Boolean.valueOf(subset)});
break;
}
case BaseFont.FONT_TYPE_CJK:
baseFont.writeFont(writer, indirectReference, new Object[]{cjkTag});
break;
case BaseFont.FONT_TYPE_TTUNI:
baseFont.writeFont(writer, indirectReference, new Object[]{longTag, Boolean.valueOf(subset)});
break;
}
}
catch(Exception e) {
throw new ExceptionConverter(e);
}
}
/** Indicates if all the glyphs and widths for that particular
* encoding should be included in the document.
* @return false to include all the glyphs and widths.
*/
public boolean isSubset() {
return subset;
}
/** Indicates if all the glyphs and widths for that particular
* encoding should be included in the document. Set to false
* to include all.
* @param subset new value of property subset
*/
public void setSubset(boolean subset) {
this.subset = subset;
}
}