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iText, a free Java-PDF library
/*
* $Id: BarcodeCodabar.java 5075 2012-02-27 16:36:18Z blowagie $
*
* This file is part of the iText (R) project.
* Copyright (c) 1998-2012 1T3XT BVBA
* Authors: Bruno Lowagie, Paulo Soares, et al.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License version 3
* as published by the Free Software Foundation with the addition of the
* following permission added to Section 15 as permitted in Section 7(a):
* FOR ANY PART OF THE COVERED WORK IN WHICH THE COPYRIGHT IS OWNED BY 1T3XT,
* 1T3XT DISCLAIMS THE WARRANTY OF NON INFRINGEMENT OF THIRD PARTY RIGHTS.
*
* This program 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 Affero General Public License for more details.
* You should have received a copy of the GNU Affero General Public License
* along with this program; if not, see http://www.gnu.org/licenses or write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA, 02110-1301 USA, or download the license from the following URL:
* http://itextpdf.com/terms-of-use/
*
* The interactive user interfaces in modified source and object code versions
* of this program must display Appropriate Legal Notices, as required under
* Section 5 of the GNU Affero General Public License.
*
* In accordance with Section 7(b) of the GNU Affero General Public License,
* a covered work must retain the producer line in every PDF that is created
* or manipulated using iText.
*
* You can be released from the requirements of the license by purchasing
* a commercial license. Buying such a license is mandatory as soon as you
* develop commercial activities involving the iText software without
* disclosing the source code of your own applications.
* These activities include: offering paid services to customers as an ASP,
* serving PDFs on the fly in a web application, shipping iText with a closed
* source product.
*
* For more information, please contact iText Software Corp. at this
* address: [email protected]
*/
package com.itextpdf.text.pdf;
import com.itextpdf.text.error_messages.MessageLocalization;
import com.itextpdf.text.Element;
import com.itextpdf.text.ExceptionConverter;
import com.itextpdf.text.Rectangle;
import com.itextpdf.text.BaseColor;
/** Implements the code codabar. The default parameters are:
*
*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;
*startStopText = false;
*
*
* @author Paulo Soares
*/
public class BarcodeCodabar extends Barcode{
/** The bars to generate the code.
*/
private static final byte BARS[][] =
{
{0,0,0,0,0,1,1}, // 0
{0,0,0,0,1,1,0}, // 1
{0,0,0,1,0,0,1}, // 2
{1,1,0,0,0,0,0}, // 3
{0,0,1,0,0,1,0}, // 4
{1,0,0,0,0,1,0}, // 5
{0,1,0,0,0,0,1}, // 6
{0,1,0,0,1,0,0}, // 7
{0,1,1,0,0,0,0}, // 8
{1,0,0,1,0,0,0}, // 9
{0,0,0,1,1,0,0}, // -
{0,0,1,1,0,0,0}, // $
{1,0,0,0,1,0,1}, // :
{1,0,1,0,0,0,1}, // /
{1,0,1,0,1,0,0}, // .
{0,0,1,0,1,0,1}, // +
{0,0,1,1,0,1,0}, // a
{0,1,0,1,0,0,1}, // b
{0,0,0,1,0,1,1}, // c
{0,0,0,1,1,1,0} // d
};
/** The index chars to BARS.
*/
private static final String CHARS = "0123456789-$:/.+ABCD";
private static final int START_STOP_IDX = 16;
/** Creates a new BarcodeCodabar.
*/
public BarcodeCodabar() {
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;
startStopText = false;
codeType = CODABAR;
}
catch (Exception e) {
throw new ExceptionConverter(e);
}
}
/** Creates the bars.
* @param text the text to create the bars
* @return the bars
*/
public static byte[] getBarsCodabar(String text) {
text = text.toUpperCase();
int len = text.length();
if (len < 2)
throw new IllegalArgumentException(MessageLocalization.getComposedMessage("codabar.must.have.at.least.a.start.and.stop.character"));
if (CHARS.indexOf(text.charAt(0)) < START_STOP_IDX || CHARS.indexOf(text.charAt(len - 1)) < START_STOP_IDX)
throw new IllegalArgumentException(MessageLocalization.getComposedMessage("codabar.must.have.one.of.abcd.as.start.stop.character"));
byte bars[] = new byte[text.length() * 8 - 1];
for (int k = 0; k < len; ++k) {
int idx = CHARS.indexOf(text.charAt(k));
if (idx >= START_STOP_IDX && k > 0 && k < len - 1)
throw new IllegalArgumentException(MessageLocalization.getComposedMessage("in.codabar.start.stop.characters.are.only.allowed.at.the.extremes"));
if (idx < 0)
throw new IllegalArgumentException(MessageLocalization.getComposedMessage("the.character.1.is.illegal.in.codabar", text.charAt(k)));
System.arraycopy(BARS[idx], 0, bars, k * 8, 7);
}
return bars;
}
public static String calculateChecksum(String code) {
if (code.length() < 2)
return code;
String text = code.toUpperCase();
int sum = 0;
int len = text.length();
for (int k = 0; k < len; ++k)
sum += CHARS.indexOf(text.charAt(k));
sum = (sum + 15) / 16 * 16 - sum;
return code.substring(0, len - 1) + CHARS.charAt(sum) + code.substring(len - 1);
}
/** 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;
String text = code;
if (generateChecksum && checksumText)
text = calculateChecksum(code);
if (!startStopText)
text = text.substring(1, text.length() - 1);
if (font != null) {
if (baseline > 0)
fontY = baseline - font.getFontDescriptor(BaseFont.DESCENT, size);
else
fontY = -baseline + size;
fontX = font.getWidthPoint(altText != null ? altText : text, size);
}
text = code;
if (generateChecksum)
text = calculateChecksum(code);
byte bars[] = getBarsCodabar(text);
int wide = 0;
for (int k = 0; k < bars.length; ++k) {
wide += bars[k];
}
int narrow = bars.length - wide;
float fullWidth = x * (narrow + wide * n);
fullWidth = Math.max(fullWidth, fontX);
float fullHeight = barHeight + fontY;
return new Rectangle(fullWidth, fullHeight);
}
/** Places the barcode in a PdfContentByte. The
* barcode is always placed at coordinates (0, 0). Use the
* translation matrix to move it elsewhere.
* The bars and text are written in the following colors:
*
*
* barColor
textColor
Result
*
* null
null
bars and text painted with current fill color
*
* barColor
null
bars and text painted with barColor
*
* null
textColor
bars painted with current color
text painted with textColor
*
* barColor
textColor
bars painted with barColor
text painted with textColor
*
* @param cb the PdfContentByte where the barcode will be placed
* @param barColor the color of the bars. It can be null
* @param textColor the color of the text. It can be null
* @return the dimensions the barcode occupies
*/
public Rectangle placeBarcode(PdfContentByte cb, BaseColor barColor, BaseColor textColor) {
String fullCode = code;
if (generateChecksum && checksumText)
fullCode = calculateChecksum(code);
if (!startStopText)
fullCode = fullCode.substring(1, fullCode.length() - 1);
float fontX = 0;
if (font != null) {
fontX = font.getWidthPoint(fullCode = altText != null ? altText : fullCode, size);
}
byte bars[] = getBarsCodabar(generateChecksum ? calculateChecksum(code) : code);
int wide = 0;
for (int k = 0; k < bars.length; ++k) {
wide += bars[k];
}
int narrow = bars.length - wide;
float fullWidth = x * (narrow + wide * n);
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;
}
}
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 java.awt.Image. 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(java.awt.Color foreground, java.awt.Color background) {
int f = foreground.getRGB();
int g = background.getRGB();
java.awt.Canvas canvas = new java.awt.Canvas();
String fullCode = code;
if (generateChecksum && checksumText)
fullCode = calculateChecksum(code);
if (!startStopText)
fullCode = fullCode.substring(1, fullCode.length() - 1);
byte bars[] = getBarsCodabar(generateChecksum ? calculateChecksum(code) : code);
int wide = 0;
for (int k = 0; k < bars.length; ++k) {
wide += bars[k];
}
int narrow = bars.length - wide;
int fullWidth = narrow + wide * (int)n;
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 : (int)n);
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);
}
java.awt.Image img = canvas.createImage(new java.awt.image.MemoryImageSource(fullWidth, height, pix, 0, fullWidth));
return img;
}
}