001/* 002 * $Id: PdfTextArray.java 4784 2011-03-15 08:33:00Z blowagie $ 003 * 004 * This file is part of the iText (R) project. 005 * Copyright (c) 1998-2011 1T3XT BVBA 006 * Authors: Bruno Lowagie, Paulo Soares, et al. 007 * 008 * This program is free software; you can redistribute it and/or modify 009 * it under the terms of the GNU Affero General Public License version 3 010 * as published by the Free Software Foundation with the addition of the 011 * following permission added to Section 15 as permitted in Section 7(a): 012 * FOR ANY PART OF THE COVERED WORK IN WHICH THE COPYRIGHT IS OWNED BY 1T3XT, 013 * 1T3XT DISCLAIMS THE WARRANTY OF NON INFRINGEMENT OF THIRD PARTY RIGHTS. 014 * 015 * This program is distributed in the hope that it will be useful, but 016 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 017 * or FITNESS FOR A PARTICULAR PURPOSE. 018 * See the GNU Affero General Public License for more details. 019 * You should have received a copy of the GNU Affero General Public License 020 * along with this program; if not, see http://www.gnu.org/licenses or write to 021 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, 022 * Boston, MA, 02110-1301 USA, or download the license from the following URL: 023 * http://itextpdf.com/terms-of-use/ 024 * 025 * The interactive user interfaces in modified source and object code versions 026 * of this program must display Appropriate Legal Notices, as required under 027 * Section 5 of the GNU Affero General Public License. 028 * 029 * In accordance with Section 7(b) of the GNU Affero General Public License, 030 * a covered work must retain the producer line in every PDF that is created 031 * or manipulated using iText. 032 * 033 * You can be released from the requirements of the license by purchasing 034 * a commercial license. Buying such a license is mandatory as soon as you 035 * develop commercial activities involving the iText software without 036 * disclosing the source code of your own applications. 037 * These activities include: offering paid services to customers as an ASP, 038 * serving PDFs on the fly in a web application, shipping iText with a closed 039 * source product. 040 * 041 * For more information, please contact iText Software Corp. at this 042 * address: sales@itextpdf.com 043 */ 044package com.itextpdf.text.pdf; 045 046import java.util.ArrayList; 047 048/** 049 * <CODE>PdfTextArray</CODE> defines an array with displacements and <CODE>PdfString</CODE>-objects. 050 * <P> 051 * A <CODE>TextArray</CODE> is used with the operator <VAR>TJ</VAR> in <CODE>PdfText</CODE>. 052 * The first object in this array has to be a <CODE>PdfString</CODE>; 053 * see reference manual version 1.3 section 8.7.5, pages 346-347. 054 * OR 055 * see reference manual version 1.6 section 5.3.2, pages 378-379. 056 */ 057 058public class PdfTextArray{ 059 ArrayList<Object> arrayList = new ArrayList<Object>(); 060 061 // To emit a more efficient array, we consolidate 062 // repeated numbers or strings into single array entries. 063 // "add( 50 ); add( -50 );" will REMOVE the combined zero from the array. 064 // the alternative (leaving a zero in there) was Just Weird. 065 // --Mark Storer, May 12, 2008 066 private String lastStr; 067 private Float lastNum; 068 069 // constructors 070 public PdfTextArray(String str) { 071 add(str); 072 } 073 074 public PdfTextArray() { 075 } 076 077 /** 078 * Adds a <CODE>PdfNumber</CODE> to the <CODE>PdfArray</CODE>. 079 * 080 * @param number displacement of the string 081 */ 082 public void add(PdfNumber number) { 083 add((float) number.doubleValue()); 084 } 085 086 public void add(float number) { 087 if (number != 0) { 088 if (lastNum != null) { 089 lastNum = new Float(number + lastNum.floatValue()); 090 if (lastNum.floatValue() != 0) { 091 replaceLast(lastNum); 092 } else { 093 arrayList.remove(arrayList.size() - 1); 094 } 095 } else { 096 lastNum = new Float(number); 097 arrayList.add(lastNum); 098 } 099 100 lastStr = null; 101 } 102 // adding zero doesn't modify the TextArray at all 103 } 104 105 public void add(String str) { 106 if (str.length() > 0) { 107 if (lastStr != null) { 108 lastStr = lastStr + str; 109 replaceLast(lastStr); 110 } else { 111 lastStr = str; 112 arrayList.add(lastStr); 113 } 114 lastNum = null; 115 } 116 // adding an empty string doesn't modify the TextArray at all 117 } 118 119 ArrayList<Object> getArrayList() { 120 return arrayList; 121 } 122 123 private void replaceLast(Object obj) { 124 // deliberately throw the IndexOutOfBoundsException if we screw up. 125 arrayList.set(arrayList.size() - 1, obj); 126 } 127}