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iTechSharp/iTextSharp/text/pdf/BarcodeCodabar.cs
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iTechSharp/iTextSharp/text/pdf/BarcodeCodabar.cs
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using System;
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using iTextSharp.text;
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/*
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* $Id: BarcodeCodabar.cs,v 1.7 2007/02/22 20:48:38 psoares33 Exp $
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*
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* Copyright 2002-2006 by Paulo Soares.
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*
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* The contents of this file are subject to the Mozilla Public License Version 1.1
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* (the "License"); you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the License.
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*
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* The Original Code is 'iText, a free JAVA-PDF library'.
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*
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* The Initial Developer of the Original Code is Bruno Lowagie. Portions created by
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* the Initial Developer are Copyright (C) 1999, 2000, 2001, 2002 by Bruno Lowagie.
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* All Rights Reserved.
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* Co-Developer of the code is Paulo Soares. Portions created by the Co-Developer
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* are Copyright (C) 2000, 2001, 2002 by Paulo Soares. All Rights Reserved.
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*
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* Contributor(s): all the names of the contributors are added in the source code
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* where applicable.
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*
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* Alternatively, the contents of this file may be used under the terms of the
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* LGPL license (the "GNU LIBRARY GENERAL PUBLIC LICENSE"), in which case the
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* provisions of LGPL are applicable instead of those above. If you wish to
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* allow use of your version of this file only under the terms of the LGPL
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* License and not to allow others to use your version of this file under
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* the MPL, indicate your decision by deleting the provisions above and
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* replace them with the notice and other provisions required by the LGPL.
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* If you do not delete the provisions above, a recipient may use your version
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* of this file under either the MPL or the GNU LIBRARY GENERAL PUBLIC LICENSE.
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*
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* This library is free software; you can redistribute it and/or modify it
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* under the terms of the MPL as stated above or under the terms of the GNU
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* Library General Public License as published by the Free Software Foundation;
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* either version 2 of the License, or any later version.
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*
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* This library is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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* FOR A PARTICULAR PURPOSE. See the GNU Library general Public License for more
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* details.
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*
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* If you didn't download this code from the following link, you should check if
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* you aren't using an obsolete version:
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* http://www.lowagie.com/iText/
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*/
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namespace iTextSharp.text.pdf
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{
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/** Implements the code codabar. The default parameters are:
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* <pre>
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*x = 0.8f;
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*n = 2;
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*font = BaseFont.CreateFont("Helvetica", "winansi", false);
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*size = 8;
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*baseline = size;
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*barHeight = size * 3;
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*textAlignment = Element.ALIGN_CENTER;
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*generateChecksum = false;
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*checksumText = false;
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*startStopText = false;
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* </pre>
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*
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* @author Paulo Soares (psoares@consiste.pt)
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*/
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public class BarcodeCodabar : Barcode{
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/** The bars to generate the code.
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*/
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private static readonly byte[][] BARS = new byte[][] {
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new byte[]{0,0,0,0,0,1,1}, // 0
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new byte[]{0,0,0,0,1,1,0}, // 1
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new byte[]{0,0,0,1,0,0,1}, // 2
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new byte[]{1,1,0,0,0,0,0}, // 3
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new byte[]{0,0,1,0,0,1,0}, // 4
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new byte[]{1,0,0,0,0,1,0}, // 5
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new byte[]{0,1,0,0,0,0,1}, // 6
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new byte[]{0,1,0,0,1,0,0}, // 7
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new byte[]{0,1,1,0,0,0,0}, // 8
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new byte[]{1,0,0,1,0,0,0}, // 9
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new byte[]{0,0,0,1,1,0,0}, // -
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new byte[]{0,0,1,1,0,0,0}, // $
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new byte[]{1,0,0,0,1,0,1}, // :
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new byte[]{1,0,1,0,0,0,1}, // /
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new byte[]{1,0,1,0,1,0,0}, // .
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new byte[]{0,0,1,0,1,0,1}, // +
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new byte[]{0,0,1,1,0,1,0}, // a
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new byte[]{0,1,0,1,0,0,1}, // b
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new byte[]{0,0,0,1,0,1,1}, // c
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new byte[]{0,0,0,1,1,1,0} // d
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};
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/** The index chars to <CODE>BARS</CODE>.
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*/
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private const string CHARS = "0123456789-$:/.+ABCD";
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private const int START_STOP_IDX = 16;
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/** Creates a new BarcodeCodabar.
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*/
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public BarcodeCodabar() {
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x = 0.8f;
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n = 2;
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font = BaseFont.CreateFont("Helvetica", "winansi", false);
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size = 8;
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baseline = size;
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barHeight = size * 3;
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textAlignment = Element.ALIGN_CENTER;
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generateChecksum = false;
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checksumText = false;
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startStopText = false;
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codeType = CODABAR;
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}
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/** Creates the bars.
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* @param text the text to create the bars
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* @return the bars
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*/
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public static byte[] GetBarsCodabar(String text) {
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text = text.ToUpper(System.Globalization.CultureInfo.InvariantCulture);
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int len = text.Length;
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if (len < 2)
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throw new ArgumentException("Codabar must have at least a start and stop character.");
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if (CHARS.IndexOf(text[0]) < START_STOP_IDX || CHARS.IndexOf(text[len - 1]) < START_STOP_IDX)
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throw new ArgumentException("Codabar must have one of 'ABCD' as start/stop character.");
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byte[] bars = new byte[text.Length * 8 - 1];
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for (int k = 0; k < len; ++k) {
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int idx = CHARS.IndexOf(text[k]);
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if (idx >= START_STOP_IDX && k > 0 && k < len - 1)
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throw new ArgumentException("In codabar, start/stop characters are only allowed at the extremes.");
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if (idx < 0)
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throw new ArgumentException("The character '" + text[k] + "' is illegal in codabar.");
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Array.Copy(BARS[idx], 0, bars, k * 8, 7);
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}
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return bars;
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}
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public static String CalculateChecksum(String code) {
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if (code.Length < 2)
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return code;
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String text = code.ToUpper(System.Globalization.CultureInfo.InvariantCulture);
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int sum = 0;
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int len = text.Length;
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for (int k = 0; k < len; ++k)
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sum += CHARS.IndexOf(text[k]);
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sum = (sum + 15) / 16 * 16 - sum;
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return code.Substring(0, len - 1) + CHARS[sum] + code.Substring(len - 1);
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}
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/** Gets the maximum area that the barcode and the text, if
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* any, will occupy. The lower left corner is always (0, 0).
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* @return the size the barcode occupies.
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*/
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public override Rectangle BarcodeSize {
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get {
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float fontX = 0;
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float fontY = 0;
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String text = code;
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if (generateChecksum && checksumText)
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text = CalculateChecksum(code);
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if (!startStopText)
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text = text.Substring(1, text.Length - 2);
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if (font != null) {
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if (baseline > 0)
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fontY = baseline - font.GetFontDescriptor(BaseFont.DESCENT, size);
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else
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fontY = -baseline + size;
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fontX = font.GetWidthPoint(altText != null ? altText : text, size);
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}
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text = code;
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if (generateChecksum)
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text = CalculateChecksum(code);
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byte[] bars = GetBarsCodabar(text);
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int wide = 0;
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for (int k = 0; k < bars.Length; ++k) {
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wide += (int)bars[k];
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}
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int narrow = bars.Length - wide;
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float fullWidth = x * (narrow + wide * n);
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fullWidth = Math.Max(fullWidth, fontX);
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float fullHeight = barHeight + fontY;
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return new Rectangle(fullWidth, fullHeight);
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}
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}
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/** Places the barcode in a <CODE>PdfContentByte</CODE>. The
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* barcode is always placed at coodinates (0, 0). Use the
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* translation matrix to move it elsewhere.<p>
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* The bars and text are written in the following colors:<p>
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* <P><TABLE BORDER=1>
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* <TR>
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* <TH><P><CODE>barColor</CODE></TH>
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* <TH><P><CODE>textColor</CODE></TH>
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* <TH><P>Result</TH>
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* </TR>
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* <TR>
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* <TD><P><CODE>null</CODE></TD>
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* <TD><P><CODE>null</CODE></TD>
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* <TD><P>bars and text painted with current fill color</TD>
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* </TR>
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* <TR>
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* <TD><P><CODE>barColor</CODE></TD>
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* <TD><P><CODE>null</CODE></TD>
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* <TD><P>bars and text painted with <CODE>barColor</CODE></TD>
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* </TR>
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* <TR>
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* <TD><P><CODE>null</CODE></TD>
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* <TD><P><CODE>textColor</CODE></TD>
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* <TD><P>bars painted with current color<br>text painted with <CODE>textColor</CODE></TD>
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* </TR>
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* <TR>
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* <TD><P><CODE>barColor</CODE></TD>
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* <TD><P><CODE>textColor</CODE></TD>
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* <TD><P>bars painted with <CODE>barColor</CODE><br>text painted with <CODE>textColor</CODE></TD>
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* </TR>
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* </TABLE>
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* @param cb the <CODE>PdfContentByte</CODE> where the barcode will be placed
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* @param barColor the color of the bars. It can be <CODE>null</CODE>
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* @param textColor the color of the text. It can be <CODE>null</CODE>
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* @return the dimensions the barcode occupies
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*/
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public override Rectangle PlaceBarcode(PdfContentByte cb, Color barColor, Color textColor) {
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String fullCode = code;
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if (generateChecksum && checksumText)
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fullCode = CalculateChecksum(code);
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if (!startStopText)
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fullCode = fullCode.Substring(1, fullCode.Length - 2);
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float fontX = 0;
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if (font != null) {
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fontX = font.GetWidthPoint(fullCode = altText != null ? altText : fullCode, size);
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}
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byte[] bars = GetBarsCodabar(generateChecksum ? CalculateChecksum(code) : code);
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int wide = 0;
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for (int k = 0; k < bars.Length; ++k) {
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wide += (int)bars[k];
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}
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int narrow = bars.Length - wide;
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float fullWidth = x * (narrow + wide * n);
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float barStartX = 0;
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float textStartX = 0;
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switch (textAlignment) {
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case Element.ALIGN_LEFT:
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break;
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case Element.ALIGN_RIGHT:
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if (fontX > fullWidth)
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barStartX = fontX - fullWidth;
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else
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textStartX = fullWidth - fontX;
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break;
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default:
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if (fontX > fullWidth)
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barStartX = (fontX - fullWidth) / 2;
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else
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textStartX = (fullWidth - fontX) / 2;
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break;
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}
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float barStartY = 0;
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float textStartY = 0;
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if (font != null) {
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if (baseline <= 0)
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textStartY = barHeight - baseline;
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else {
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textStartY = -font.GetFontDescriptor(BaseFont.DESCENT, size);
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barStartY = textStartY + baseline;
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}
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}
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bool print = true;
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if (barColor != null)
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cb.SetColorFill(barColor);
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for (int k = 0; k < bars.Length; ++k) {
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float w = (bars[k] == 0 ? x : x * n);
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if (print)
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cb.Rectangle(barStartX, barStartY, w - inkSpreading, barHeight);
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print = !print;
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barStartX += w;
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}
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cb.Fill();
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if (font != null) {
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if (textColor != null)
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cb.SetColorFill(textColor);
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cb.BeginText();
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cb.SetFontAndSize(font, size);
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cb.SetTextMatrix(textStartX, textStartY);
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cb.ShowText(fullCode);
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cb.EndText();
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}
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return BarcodeSize;
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}
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public override System.Drawing.Image CreateDrawingImage(System.Drawing.Color foreground, System.Drawing.Color background) {
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String fullCode = code;
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if (generateChecksum && checksumText)
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fullCode = CalculateChecksum(code);
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if (!startStopText)
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fullCode = fullCode.Substring(1, fullCode.Length - 2);
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byte[] bars = GetBarsCodabar(generateChecksum ? CalculateChecksum(code) : code);
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int wide = 0;
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for (int k = 0; k < bars.Length; ++k) {
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wide += (int)bars[k];
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}
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int narrow = bars.Length - wide;
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int fullWidth = narrow + wide * (int)n;
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int height = (int)barHeight;
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System.Drawing.Bitmap bmp = new System.Drawing.Bitmap(fullWidth, height);
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for (int h = 0; h < height; ++h) {
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bool print = true;
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int ptr = 0;
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for (int k = 0; k < bars.Length; ++k) {
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int w = (bars[k] == 0 ? 1 : (int)n);
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System.Drawing.Color c = background;
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if (print)
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c = foreground;
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print = !print;
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for (int j = 0; j < w; ++j)
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bmp.SetPixel(ptr++, h, c);
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}
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}
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return bmp;
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}
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}
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}
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