/*
* $Id: PdfTextArray.java 4784 2011-03-15 08:33:00Z blowagie $
*
* This file is part of the iText (R) project.
* Copyright (c) 1998-2011 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 java.util.ArrayList;
/**
* <CODE>PdfTextArray</CODE> defines an array with displacements and <CODE>PdfString</CODE>-objects.
* <P>
* A <CODE>TextArray</CODE> is used with the operator <VAR>TJ</VAR> in <CODE>PdfText</CODE>.
* The first object in this array has to be a <CODE>PdfString</CODE>;
* see reference manual version 1.3 section 8.7.5, pages 346-347.
* OR
* see reference manual version 1.6 section 5.3.2, pages 378-379.
*/
public class PdfTextArray{
ArrayList<Object> arrayList = new ArrayList<Object>();
// To emit a more efficient array, we consolidate
// repeated numbers or strings into single array entries.
// "add( 50 ); add( -50 );" will REMOVE the combined zero from the array.
// the alternative (leaving a zero in there) was Just Weird.
// --Mark Storer, May 12, 2008
private String lastStr;
private Float lastNum;
// constructors
public PdfTextArray(String str) {
add(str);
}
public PdfTextArray() {
}
/**
* Adds a <CODE>PdfNumber</CODE> to the <CODE>PdfArray</CODE>.
*
* @param number displacement of the string
*/
public void add(PdfNumber number) {
add((float) number.doubleValue());
}
public void add(float number) {
if (number != 0) {
if (lastNum != null) {
lastNum = new Float(number + lastNum.floatValue());
if (lastNum.floatValue() != 0) {
replaceLast(lastNum);
} else {
arrayList.remove(arrayList.size() - 1);
}
} else {
lastNum = new Float(number);
arrayList.add(lastNum);
}
lastStr = null;
}
// adding zero doesn't modify the TextArray at all
}
public void add(String str) {
if (str.length() > 0) {
if (lastStr != null) {
lastStr = lastStr + str;
replaceLast(lastStr);
} else {
lastStr = str;
arrayList.add(lastStr);
}
lastNum = null;
}
// adding an empty string doesn't modify the TextArray at all
}
ArrayList<Object> getArrayList() {
return arrayList;
}
private void replaceLast(Object obj) {
// deliberately throw the IndexOutOfBoundsException if we screw up.
arrayList.set(arrayList.size() - 1, obj);
}
}
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