/*
* $Id$
*
* Copyright 2002-2006 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.awt.Canvas;
import java.awt.Color;
import java.awt.Image;
import java.awt.image.MemoryImageSource;
import com.lowagie.text.error_messages.MessageLocalization;
import com.lowagie.text.Element;
import com.lowagie.text.ExceptionConverter;
import com.lowagie.text.Rectangle;
/** Implements the code interleaved 2 of 5. The text can include
* non numeric characters that are printed but do not generate bars.
* The default parameters are:
* <pre>
*x = 0.8f;
*n = 2;
*font = BaseFont.createFont("Helvetica", "winansi", false);
*size = 8;
*baseline = size;
*barHeight = size * 3;
*textAlignment = Element.ALIGN_CENTER;
*generateChecksum = false;
*checksumText = false;
* </pre>
*
* @author Paulo Soares (psoares@consiste.pt)
*/
public class BarcodeInter25 extends Barcode{
/** The bars to generate the code.
*/
private static final byte BARS[][] =
{
{0,0,1,1,0},
{1,0,0,0,1},
{0,1,0,0,1},
{1,1,0,0,0},
{0,0,1,0,1},
{1,0,1,0,0},
{0,1,1,0,0},
{0,0,0,1,1},
{1,0,0,1,0},
{0,1,0,1,0}
};
/** Creates new BarcodeInter25 */
public BarcodeInter25() {
try {
x = 0.8f;
n = 2;
font = BaseFont.createFont("Helvetica", "winansi", false);
size = 8;
baseline = size;
barHeight = size * 3;
textAlignment = Element.ALIGN_CENTER;
generateChecksum = false;
checksumText = false;
}
catch (Exception e) {
throw new ExceptionConverter(e);
}
}
/** Deletes all the non numeric characters from <CODE>text</CODE>.
* @param text the text
* @return a <CODE>String</CODE> with only numeric characters
*/
public static String keepNumbers(String text) {
StringBuffer sb = new StringBuffer();
for (int k = 0; k < text.length(); ++k) {
char c = text.charAt(k);
if (c >= '0' && c <= '9')
sb.append(c);
}
return sb.toString();
}
/** Calculates the checksum.
* @param text the numeric text
* @return the checksum
*/
public static char getChecksum(String text) {
int mul = 3;
int total = 0;
for (int k = text.length() - 1; k >= 0; --k) {
int n = text.charAt(k) - '0';
total += mul * n;
mul ^= 2;
}
return (char)(((10 - (total % 10)) % 10) + '0');
}
/** Creates the bars for the barcode.
* @param text the text. It can contain non numeric characters
* @return the barcode
*/
public static byte[] getBarsInter25(String text) {
text = keepNumbers(text);
if ((text.length() & 1) != 0)
throw new IllegalArgumentException(MessageLocalization.getComposedMessage("the.text.length.must.be.even"));
byte bars[] = new byte[text.length() * 5 + 7];
int pb = 0;
bars[pb++] = 0;
bars[pb++] = 0;
bars[pb++] = 0;
bars[pb++] = 0;
int len = text.length() / 2;
for (int k = 0; k < len; ++k) {
int c1 = text.charAt(k * 2) - '0';
int c2 = text.charAt(k * 2 + 1) - '0';
byte b1[] = BARS[c1];
byte b2[] = BARS[c2];
for (int j = 0; j < 5; ++j) {
bars[pb++] = b1[j];
bars[pb++] = b2[j];
}
}
bars[pb++] = 1;
bars[pb++] = 0;
bars[pb++] = 0;
return bars;
}
/** Gets the maximum area that the barcode and the text, if
* any, will occupy. The lower left corner is always (0, 0).
* @return the size the barcode occupies.
*/
public Rectangle getBarcodeSize() {
float fontX = 0;
float fontY = 0;
if (font != null) {
if (baseline > 0)
fontY = baseline - font.getFontDescriptor(BaseFont.DESCENT, size);
else
fontY = -baseline + size;
String fullCode = code;
if (generateChecksum && checksumText)
fullCode += getChecksum(fullCode);
fontX = font.getWidthPoint(altText != null ? altText : fullCode, size);
}
String fullCode = keepNumbers(code);
int len = fullCode.length();
if (generateChecksum)
++len;
float fullWidth = len * (3 * x + 2 * x * n) + (6 + n ) * x;
fullWidth = Math.max(fullWidth, fontX);
float fullHeight = barHeight + fontY;
return new Rectangle(fullWidth, fullHeight);
}
/** Places the barcode in a <CODE>PdfContentByte</CODE>. The
* barcode is always placed at coordinates (0, 0). Use the
* translation matrix to move it elsewhere.<p>
* The bars and text are written in the following colors:<p>
* <P><TABLE BORDER=1>
* <TR>
* <TH><P><CODE>barColor</CODE></TH>
* <TH><P><CODE>textColor</CODE></TH>
* <TH><P>Result</TH>
* </TR>
* <TR>
* <TD><P><CODE>null</CODE></TD>
* <TD><P><CODE>null</CODE></TD>
* <TD><P>bars and text painted with current fill color</TD>
* </TR>
* <TR>
* <TD><P><CODE>barColor</CODE></TD>
* <TD><P><CODE>null</CODE></TD>
* <TD><P>bars and text painted with <CODE>barColor</CODE></TD>
* </TR>
* <TR>
* <TD><P><CODE>null</CODE></TD>
* <TD><P><CODE>textColor</CODE></TD>
* <TD><P>bars painted with current color<br>text painted with <CODE>textColor</CODE></TD>
* </TR>
* <TR>
* <TD><P><CODE>barColor</CODE></TD>
* <TD><P><CODE>textColor</CODE></TD>
* <TD><P>bars painted with <CODE>barColor</CODE><br>text painted with <CODE>textColor</CODE></TD>
* </TR>
* </TABLE>
* @param cb the <CODE>PdfContentByte</CODE> where the barcode will be placed
* @param barColor the color of the bars. It can be <CODE>null</CODE>
* @param textColor the color of the text. It can be <CODE>null</CODE>
* @return the dimensions the barcode occupies
*/
public Rectangle placeBarcode(PdfContentByte cb, Color barColor, Color textColor) {
String fullCode = code;
float fontX = 0;
if (font != null) {
if (generateChecksum && checksumText)
fullCode += getChecksum(fullCode);
fontX = font.getWidthPoint(fullCode = altText != null ? altText : fullCode, size);
}
String bCode = keepNumbers(code);
if (generateChecksum)
bCode += getChecksum(bCode);
int len = bCode.length();
float fullWidth = len * (3 * x + 2 * x * n) + (6 + n ) * x;
float barStartX = 0;
float textStartX = 0;
switch (textAlignment) {
case Element.ALIGN_LEFT:
break;
case Element.ALIGN_RIGHT:
if (fontX > fullWidth)
barStartX = fontX - fullWidth;
else
textStartX = fullWidth - fontX;
break;
default:
if (fontX > fullWidth)
barStartX = (fontX - fullWidth) / 2;
else
textStartX = (fullWidth - fontX) / 2;
break;
}
float barStartY = 0;
float textStartY = 0;
if (font != null) {
if (baseline <= 0)
textStartY = barHeight - baseline;
else {
textStartY = -font.getFontDescriptor(BaseFont.DESCENT, size);
barStartY = textStartY + baseline;
}
}
byte bars[] = getBarsInter25(bCode);
boolean print = true;
if (barColor != null)
cb.setColorFill(barColor);
for (int k = 0; k < bars.length; ++k) {
float w = (bars[k] == 0 ? x : x * n);
if (print)
cb.rectangle(barStartX, barStartY, w - inkSpreading, barHeight);
print = !print;
barStartX += w;
}
cb.fill();
if (font != null) {
if (textColor != null)
cb.setColorFill(textColor);
cb.beginText();
cb.setFontAndSize(font, size);
cb.setTextMatrix(textStartX, textStartY);
cb.showText(fullCode);
cb.endText();
}
return getBarcodeSize();
}
/** Creates a <CODE>java.awt.Image</CODE>. This image only
* contains the bars without any text.
* @param foreground the color of the bars
* @param background the color of the background
* @return the image
*/
public java.awt.Image createAwtImage(Color foreground, Color background) {
int f = foreground.getRGB();
int g = background.getRGB();
Canvas canvas = new Canvas();
String bCode = keepNumbers(code);
if (generateChecksum)
bCode += getChecksum(bCode);
int len = bCode.length();
int nn = (int)n;
int fullWidth = len * (3 + 2 * nn) + (6 + nn );
byte bars[] = getBarsInter25(bCode);
boolean print = true;
int ptr = 0;
int height = (int)barHeight;
int pix[] = new int[fullWidth * height];
for (int k = 0; k < bars.length; ++k) {
int w = (bars[k] == 0 ? 1 : nn);
int c = g;
if (print)
c = f;
print = !print;
for (int j = 0; j < w; ++j)
pix[ptr++] = c;
}
for (int k = fullWidth; k < pix.length; k += fullWidth) {
System.arraycopy(pix, 0, pix, k, fullWidth);
}
Image img = canvas.createImage(new MemoryImageSource(fullWidth, height, pix, 0, fullWidth));
return img;
}
}