Initial Commit

iTechSharp/iTextSharp/text/pdf/PdfTextArray.cs

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+using System;
+using System.Collections;
+
+/*
+ * 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/
+ */
+
+namespace iTextSharp.text.pdf {
+
+    /**
+    * <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 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 = float.NaN;
+        
+        // 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 (!float.IsNaN(lastNum)) {
+                    lastNum += number;
+                    if (lastNum != 0) {
+                        ReplaceLast(lastNum);
+                    } else {
+                        arrayList.RemoveAt(arrayList.Count - 1);
+                    }
+                } else {
+                    lastNum = 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 = float.NaN;
+            }
+            // adding an empty string doesn't modify the TextArray at all
+        }
+        
+        internal ArrayList ArrayList {
+            get {
+                return arrayList;
+            }
+        }
+        
+        private void ReplaceLast(Object obj) {
+            // deliberately throw the IndexOutOfBoundsException if we screw up.
+            arrayList[arrayList.Count - 1] = obj;
+        }
+    }
+}