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/*
* $Id: PdfTextArray.java 3382 2008-05-15 10:18:45Z psoares33 $
*
* Copyright 1999, 2000, 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/
*/
package com.aowagie.text.pdf;
import java.util.ArrayList;
/**
* PdfTextArray defines an array with displacements and PdfString-objects.
*
* A TextArray is used with the operator TJ in PdfText.
* The first object in this array has to be a PdfString;
* 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.
*/
class PdfTextArray{
private final ArrayList arrayList = new ArrayList();
// 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
PdfTextArray(final String str) {
add(str);
}
public PdfTextArray() {
}
void add(final float number) {
if (number != 0) {
if (this.lastNum != null) {
this.lastNum = new Float(number + this.lastNum.floatValue());
if (this.lastNum.floatValue() != 0) {
replaceLast(this.lastNum);
} else {
this.arrayList.remove(this.arrayList.size() - 1);
}
} else {
this.lastNum = new Float(number);
this.arrayList.add(this.lastNum);
}
this.lastStr = null;
}
// adding zero doesn't modify the TextArray at all
}
void add(final String str) {
if (str.length() > 0) {
if (this.lastStr != null) {
this.lastStr = this.lastStr + str;
replaceLast(this.lastStr);
} else {
this.lastStr = str;
this.arrayList.add(this.lastStr);
}
this.lastNum = null;
}
// adding an empty string doesn't modify the TextArray at all
}
ArrayList getArrayList() {
return this.arrayList;
}
private void replaceLast(final Object obj) {
// deliberately throw the IndexOutOfBoundsException if we screw up.
this.arrayList.set(this.arrayList.size() - 1, obj);
}
}