Initial Commit

iTechSharp/iTextSharp/text/Row.cs

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+using System;
+using System.Collections;
+using System.util;
+
+/*
+ * $Id: Row.cs,v 1.10 2008/05/13 11:25:12 psoares33 Exp $
+ * 
+ *
+ * Copyright 1999, 2000, 2001, 2002 by 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 {
+    /// <summary>
+    /// A Row is part of a Table
+    /// and contains some Cells.
+    /// </summary>
+    /// <remarks>
+    /// All Rows are constructed by a Table-object.
+    /// You don't have to construct any Row yourself.
+    /// In fact you can't construct a Row outside the package.
+    /// <P/>
+    /// Since a Cell can span several rows and/or columns
+    /// a row can contain reserved space without any content.
+    /// </remarks>
+    /// <seealso cref="T:iTextSharp.text.Element"/>
+    /// <seealso cref="T:iTextSharp.text.Cell"/>
+    /// <seealso cref="T:iTextSharp.text.Table"/>
+    public class Row : IElement {
+    
+        // membervariables
+    
+        /// <summary> id of a null element in a Row</summary>
+        public static int NULL = 0;
+    
+        /// <summary> id of the Cell element in a Row</summary>
+        public static int CELL = 1;
+    
+        /// <summary> id of the Table element in a Row</summary>
+        public static int TABLE = 2;
+    
+        /// <summary> This is the number of columns in the Row. </summary>
+        protected int columns;
+    
+        /// <summary> This is a valid position the Row. </summary>
+        protected int currentColumn;
+    
+        /// <summary> This is the array that keeps track of reserved cells. </summary>
+        protected bool[] reserved;
+    
+        /// <summary> This is the array of Objects (Cell or Table). </summary>
+        protected Object[] cells;
+    
+        /// <summary> This is the horizontal alignment. </summary>
+        protected int horizontalAlignment;
+    
+        // constructors
+    
+        /// <summary>
+        /// Constructs a Row with a certain number of columns.
+        /// </summary>
+        /// <param name="columns">a number of columns</param>
+        internal Row(int columns) {
+            this.columns = columns;
+            reserved = new bool[columns];
+            cells = new Object[columns];
+            currentColumn = 0;
+        }
+    
+        // implementation of the Element-methods
+    
+        /// <summary>
+        /// Processes the element by adding it (or the different parts) to a
+        /// IElementListener.
+        /// </summary>
+        /// <param name="listener">an IElementListener</param>
+        /// <returns>true if the element was processed successfully</returns>
+        public bool Process(IElementListener listener) {
+            try {
+                return listener.Add(this);
+            }
+            catch (DocumentException) {
+                return false;
+            }
+        }
+    
+        /// <summary>
+        /// Gets the type of the text element.
+        /// </summary>
+        /// <value>a type</value>
+        public int Type {
+            get {
+                return Element.ROW;
+            }
+        }
+    
+        /// <summary>
+        /// Gets all the chunks in this element.
+        /// </summary>
+        /// <value>an ArrayList</value>
+        public ArrayList Chunks {
+            get {
+                return new ArrayList();
+            }
+        }
+    
+        /**
+        * @see com.lowagie.text.Element#isContent()
+        * @since   iText 2.0.8
+        */
+        public bool IsContent() {
+            return true;
+        }
+
+        /**
+        * @see com.lowagie.text.Element#isNestable()
+        * @since   iText 2.0.8
+        */
+        public bool IsNestable() {
+            return false;
+        }
+
+        /// <summary>
+        /// Deletes a certain column has been deleted.
+        /// </summary>
+        /// <param name="column">the number of the column to delete</param>
+        internal void DeleteColumn(int column) {
+            if ((column >= columns) || (column < 0)) {
+                throw new Exception("getCell at illegal index : " + column);
+            }
+            columns--;
+            bool[] newReserved = new bool[columns];
+                Object[] newCells = new Cell[columns];
+        
+                    for (int i = 0; i < column; i++) {
+                        newReserved[i] = reserved[i];
+                        newCells[i] = cells[i];
+                        if (newCells[i] != null && (i + ((Cell) newCells[i]).Colspan > column)) {
+                            ((Cell) newCells[i]).Colspan = ((Cell) cells[i]).Colspan - 1;
+                        }
+                    }
+            for (int i = column; i < columns; i++) {
+                newReserved[i] = reserved[i + 1];
+                newCells[i] = cells[i + 1];
+            }
+            if (cells[column] != null && ((Cell) cells[column]).Colspan > 1) {
+                newCells[column] = cells[column];
+                ((Cell) newCells[column]).Colspan = ((Cell) newCells[column]).Colspan - 1;
+            }
+            reserved = newReserved;
+            cells = newCells;
+        }
+    
+        // methods
+    
+        /// <summary>
+        /// Adds a Cell to the Row.
+        /// </summary>
+        /// <param name="element">the element to add (currently only Cells and Tables supported)</param>
+        /// <returns>
+        /// the column position the Cell was added,
+        ///        or -1 if the element couldn't be added.
+        /// </returns>
+        internal int AddElement(Object element) {
+            return AddElement(element, currentColumn);
+        }
+    
+        /// <summary>
+        /// Adds an element to the Row at the position given.
+        /// </summary>
+        /// <param name="element">the element to add. (currently only Cells and Tables supported</param>
+        /// <param name="column">the position where to add the cell</param>
+        /// <returns>
+        /// the column position the Cell was added,
+        ///        or -1 if the Cell couldn't be added.
+        /// </returns>
+        internal int AddElement(Object element, int column) {
+            if (element == null) throw new Exception("addCell - null argument");
+            if ((column < 0) || (column > columns)) throw new Exception("addCell - illegal column argument");
+            if ( !((GetObjectID(element) == CELL) || (GetObjectID(element) == TABLE)) ) throw new ArgumentException("addCell - only Cells or Tables allowed");
+        
+            int lColspan = ((element is Cell) ? ((Cell)element).Colspan : 1);
+        
+            if (!Reserve(column, lColspan)) {
+                return -1;
+            }
+        
+            cells[column] = element;
+            currentColumn += lColspan - 1;
+        
+            return column;
+        }
+    
+        /// <summary>
+        /// Puts Cell to the Row at the position given, doesn't reserve colspan.
+        /// </summary>
+        /// <param name="aElement">the cell to add.</param>
+        /// <param name="column">the position where to add the cell.</param>
+        internal void SetElement(Object aElement, int column) {
+            if (reserved[column]) throw new ArgumentException("setElement - position already taken");
+        
+            cells[column] = aElement;
+            if (aElement != null) {
+                reserved[column] = true;
+            }
+        }
+    
+        /// <summary>
+        /// Reserves a Cell in the Row.
+        /// </summary>
+        /// <param name="column">the column that has to be reserved.</param>
+        /// <returns>true if the column was reserved, false if not.</returns>
+        internal bool Reserve(int column) {
+            return Reserve(column, 1);
+        }
+    
+    
+        /// <summary>
+        /// Reserves a Cell in the Row.
+        /// </summary>
+        /// <param name="column">the column that has to be reserved.</param>
+        /// <param name="size">the number of columns</param>
+        /// <returns>true if the column was reserved, false if not.</returns>
+        internal bool Reserve(int column, int size) {
+            if ((column < 0) || ((column + size) > columns)) throw new Exception("reserve - incorrect column/size");
+        
+            for (int i=column; i < column + size; i++) {
+                if (reserved[i]) {
+                    // undo reserve
+                    for (int j=i; j >= column; j--) {
+                        reserved[j] = false;
+                    }
+                    return false;
+                }
+                reserved[i] = true;
+            }
+            return true;
+        }
+    
+        // methods to retrieve information
+    
+        /// <summary>
+        /// Returns true/false when this position in the Row has been reserved, either filled or through a colspan of an Element.
+        /// </summary>
+        /// <param name="column">the column.</param>
+        /// <returns>true if the column was reserved, false if not.</returns>
+        internal bool IsReserved(int column) {
+            return reserved[column];
+        }
+    
+        /// <summary>
+        /// Returns the type-id of the element in a Row.
+        /// </summary>
+        /// <param name="column">the column of which you'd like to know the type</param>
+        /// <returns>the element id</returns>
+        int GetElementID(int column) {
+            if (cells[column] == null) return NULL;
+            else if (cells[column] is Cell) return CELL;
+            else if (cells[column] is Table) return TABLE;
+        
+            return -1;
+        }
+    
+    
+        /// <summary>
+        /// Returns the type-id of an Object.
+        /// </summary>
+        /// <param name="element"></param>
+        /// <returns>the object of which you'd like to know the type-id, -1 if invalid</returns>
+        int GetObjectID(Object element) {
+            if (element == null) return NULL;
+            else if (element is Cell) return CELL;
+            else if (element is Table) return TABLE;
+        
+            return -1;
+        }
+    
+    
+        /// <summary>
+        /// Gets a Cell or Table from a certain column.
+        /// </summary>
+        /// <param name="column">the column the Cell/Table is in.</param>
+        /// <returns>
+        /// the Cell,Table or Object if the column was
+        /// reserved or null if empty.
+        /// </returns>
+        public Object GetCell(int column) {
+            if ((column < 0) || (column > columns)) {
+                throw new Exception("getCell at illegal index :" + column + " max is " + columns);
+            }
+            return cells[column];
+        }
+    
+        /// <summary>
+        /// Checks if the row is empty.
+        /// </summary>
+        /// <returns>true if none of the columns is reserved.</returns>
+        public bool IsEmpty() {
+            for (int i = 0; i < columns; i++) {
+                if (cells[i] != null) {
+                    return false;
+                }
+            }
+            return true;
+        }
+    
+        /// <summary>
+        /// Gets the number of columns.
+        /// </summary>
+        /// <value>a value</value>
+        public int Columns {
+            get {
+                return columns;
+            }
+        }
+    
+        /// <summary>
+        /// Gets the horizontal Element.
+        /// </summary>
+        /// <value>a value</value>
+        public int HorizontalAlignment {
+            get {
+                return horizontalAlignment;
+            }
+            set {
+                horizontalAlignment = value;
+            }
+        }
+    
+        public override string ToString() {
+            return base.ToString();
+        }
+    }
+}