pdfbarcode.cs

好的源码程序

using System;
using System.Text;

/*
 * $Id: PdfBarcode.cs,v 1.1.1.1 2003/02/04 02:57:03 geraldhenson Exp $
 * $Name:  $
 *
 * Copyright 2001, 2002 Bruno Lowagie
 *
 * 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/
 */

namespace iTextSharp.text.pdf {


	/**
	 * A barcode is a Chunk with a certain type of barcode font.
	 * <P>
	 * With this class you can construct several types of barcode
	 * in different sizes, representing any 'product' or 'article' number.
	 */

	public class PdfBarcode : iTextSharp.text.Chunk {
    
		/** This is a type of barcode. */
		public const int CODE39 = 1;
    
		/** This is a type of barcode. */
		public const int UPCA = 2;
    
		/** This is a type of barcode. */
		public const int EAN13 = 3;
    
		/** This is a type of barcode. */
		public const int INTERLEAVED_2_OF_5 = 4;
    
		/** The variable parity table in EAN 13 */
		public static int[][] variableParity = { 
			new int[] {0, 0, 0, 0, 0, 0, 2, 2, 2, 2, 2, 2}, 
			new int[] {0, 0, 1, 0, 1, 1, 2, 2, 2, 2, 2, 2}, 
			new int[] {0, 0, 1, 1, 0, 1, 2, 2, 2, 2, 2, 2}, 
			new int[] {0, 0, 1, 1, 1, 0, 2, 2, 2, 2, 2, 2}, 
			new int[] {0, 1, 0, 0, 1, 1, 2, 2, 2, 2, 2, 2}, 
			new int[] {0, 1, 1, 0, 0, 1, 2, 2, 2, 2, 2, 2}, 
			new int[] {0, 1, 1, 1, 0, 0, 2, 2, 2, 2, 2, 2}, 
			new int[] {0, 1, 0, 1, 0, 1, 2, 2, 2, 2, 2, 2}, 
			new int[] {0, 1, 0, 1, 1, 0, 2, 2, 2, 2, 2, 2}, 
			new int[] {0, 1, 1, 0, 1, 0, 2, 2, 2, 2, 2, 2}
											   };
    
		/**
		 * Creates a new Barcode.
		 *
		 * @param   ttf     the ttf file representing the barcode font
		 * @param   size    the size of the barcode
		 * @param   number  the number you want to convert to a barcode in string format
		 */
    
		public PdfBarcode(string ttf, int type, int size, string number) : base(convertToCode(type, number), new iTextSharp.text.Font(BaseFont.createFont(ttf, "winansi", true), size)) {}
    
		/**
		 * Creates a new Barcode.
		 *
		 * @param   ttf     the ttf file representing the barcode font
		 * @param   size    the size of the barcode
		 * @param   number  the number you want to convert to a barcode in long format
		 */
    
		public PdfBarcode(string ttf, int type, int size, long number) : base(convertToCode(type, number.ToString()), new iTextSharp.text.Font(BaseFont.createFont(ttf, "winansi", true), size)) {}
    
		/**
		 * Converts a string representing a number to a barcode with a specific barcode font.
		 *
		 * @param   type    the type of barcode
		 * @param   number  the number you want to convert to a barcode in long format
		 */
    
		private static string convertToCode(int type, string number) {
			StringBuilder code = new StringBuilder();
			int length = number.Length;
			int digit;
			int pos = 0;
			try {
				switch(type) {
					case CODE39:
						code.Append('*');
						while (pos < length) {
							code.Append(number.Substring(pos, 1));
							++pos;
						}
						code.Append('*');
						break;
					case UPCA:
						if (length > 12) throw new iTextSharp.text.BadElementException("An UPC-A barcode can only encode a 12 digit number (your number was " + number + ").");
						number = addZero(number, 12);
						digit = int.Parse(number.Substring(pos, 1));
						++pos;
						code.Append((char) (digit + 80));
						while (pos < 6) {
							digit = int.Parse(number.Substring(pos, 1));
							++pos;
							code.Append((char) (digit + 48));
						}
						code.Append((char) 112);
						while (pos < 11) {
							digit = int.Parse(number.Substring(pos, 1));
							++pos;
							code.Append((char) (digit + 64));
						}
						digit = int.Parse(number.Substring(11));
						code.Append((char) (digit + 96));
						break;
					case EAN13:
						if (length > 13) throw new iTextSharp.text.BadElementException("An EAN-13 barcode can only encode a 13 digit number (your number was " + number + ").");
						number = addZero(number, 13);
						int firstdigit = int.Parse(number.Substring(pos, 1));
						++pos;
						code.Append((char) (firstdigit + 33));
						digit = int.Parse(number.Substring(pos, 1));
						++pos;
						code.Append((char) (digit + 96));
						while (pos < 7) {
							digit = int.Parse(number.Substring(pos, 1));
							++pos;
							code.Append((char) (digit + 48 + 16 * variableParity[firstdigit][pos - 2]));
						}
						code.Append((char) 124);
						while (pos < 12) {
							digit = int.Parse(number.Substring(pos, 1));
							++pos;
							code.Append((char) (digit + 48 + 16 * variableParity[firstdigit][pos - 2]));
						}
						digit = int.Parse(number.Substring(12));
						code.Append((char) (digit + 112));
						break;
					case INTERLEAVED_2_OF_5:
						if (length % 2 == 1) {
							number = addZero(number, length + 1);
						}
						code.Append('(');
						while (number.Length > 2) {
							digit = int.Parse(number.Substring(0, 2));
							code.Append(convertInterleaved(digit));
							pos += 2;
							number = number.Substring(2);
						}
						digit = int.Parse(number);
						code.Append(convertInterleaved(digit));
						code.Append(')');
						break;
					default:
						throw new iTextSharp.text.BadElementException("This type of barcode is not supported yet: " + type);
				}
			}
			catch(Exception nfe) {
				throw new iTextSharp.text.BadElementException("NumberFormatException at position " + pos + " in " + number + ": " + nfe.Message);
			}
			return code.ToString();
		}
    
		/**
		 * Converts an int to a convert interleaved character.
		 */
    
		private static char convertInterleaved(int digits) {
			int i;
			if (digits < 50) {
				i = 48;
			}
			else if (digits < 100) {
				i = 142;
			}
			else {
				throw new Exception(digits.ToString());
			}
			return (char)(digits + i);
		}
    
		/**
		 * Adds leading zeros.
		 */
    
		private static string addZero(string number, int length) {
			StringBuilder buf = new StringBuilder();
			int zeros = length - number.Length;
			for (int i = 0; i < zeros; i++) {
				buf.Append('0');
			}
			buf.Append(number);
			return buf.ToString();
		}
	}
}