377 lines
14 KiB
C#
377 lines
14 KiB
C#
using System;
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using System.Collections;
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using System.util;
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/*
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* $Id: Row.cs,v 1.10 2008/05/13 11:25:12 psoares33 Exp $
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*
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*
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* Copyright 1999, 2000, 2001, 2002 by Bruno Lowagie.
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*
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* The contents of this file are subject to the Mozilla Public License Version 1.1
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* (the "License"); you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the License.
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*
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* The Original Code is 'iText, a free JAVA-PDF library'.
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*
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* The Initial Developer of the Original Code is Bruno Lowagie. Portions created by
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* the Initial Developer are Copyright (C) 1999, 2000, 2001, 2002 by Bruno Lowagie.
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* All Rights Reserved.
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* Co-Developer of the code is Paulo Soares. Portions created by the Co-Developer
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* are Copyright (C) 2000, 2001, 2002 by Paulo Soares. All Rights Reserved.
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*
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* Contributor(s): all the names of the contributors are added in the source code
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* where applicable.
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*
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* Alternatively, the contents of this file may be used under the terms of the
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* LGPL license (the "GNU LIBRARY GENERAL PUBLIC LICENSE"), in which case the
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* provisions of LGPL are applicable instead of those above. If you wish to
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* allow use of your version of this file only under the terms of the LGPL
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* License and not to allow others to use your version of this file under
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* the MPL, indicate your decision by deleting the provisions above and
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* replace them with the notice and other provisions required by the LGPL.
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* If you do not delete the provisions above, a recipient may use your version
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* of this file under either the MPL or the GNU LIBRARY GENERAL PUBLIC LICENSE
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*
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* This library is free software; you can redistribute it and/or modify it
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* under the terms of the MPL as stated above or under the terms of the GNU
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* Library General Public License as published by the Free Software Foundation;
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* either version 2 of the License, or any later version.
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*
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* This library is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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* FOR A PARTICULAR PURPOSE. See the GNU LIBRARY GENERAL PUBLIC LICENSE for more
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* details.
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*
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* If you didn't download this code from the following link, you should check if
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* you aren't using an obsolete version:
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* http://www.lowagie.com/iText/
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*/
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namespace iTextSharp.text {
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/// <summary>
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/// A Row is part of a Table
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/// and contains some Cells.
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/// </summary>
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/// <remarks>
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/// All Rows are constructed by a Table-object.
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/// You don't have to construct any Row yourself.
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/// In fact you can't construct a Row outside the package.
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/// <P/>
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/// Since a Cell can span several rows and/or columns
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/// a row can contain reserved space without any content.
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/// </remarks>
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/// <seealso cref="T:iTextSharp.text.Element"/>
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/// <seealso cref="T:iTextSharp.text.Cell"/>
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/// <seealso cref="T:iTextSharp.text.Table"/>
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public class Row : IElement {
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// membervariables
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/// <summary> id of a null element in a Row</summary>
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public static int NULL = 0;
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/// <summary> id of the Cell element in a Row</summary>
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public static int CELL = 1;
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/// <summary> id of the Table element in a Row</summary>
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public static int TABLE = 2;
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/// <summary> This is the number of columns in the Row. </summary>
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protected int columns;
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/// <summary> This is a valid position the Row. </summary>
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protected int currentColumn;
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/// <summary> This is the array that keeps track of reserved cells. </summary>
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protected bool[] reserved;
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/// <summary> This is the array of Objects (Cell or Table). </summary>
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protected Object[] cells;
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/// <summary> This is the horizontal alignment. </summary>
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protected int horizontalAlignment;
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// constructors
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/// <summary>
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/// Constructs a Row with a certain number of columns.
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/// </summary>
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/// <param name="columns">a number of columns</param>
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internal Row(int columns) {
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this.columns = columns;
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reserved = new bool[columns];
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cells = new Object[columns];
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currentColumn = 0;
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}
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// implementation of the Element-methods
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/// <summary>
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/// Processes the element by adding it (or the different parts) to a
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/// IElementListener.
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/// </summary>
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/// <param name="listener">an IElementListener</param>
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/// <returns>true if the element was processed successfully</returns>
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public bool Process(IElementListener listener) {
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try {
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return listener.Add(this);
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}
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catch (DocumentException) {
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return false;
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}
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}
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/// <summary>
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/// Gets the type of the text element.
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/// </summary>
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/// <value>a type</value>
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public int Type {
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get {
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return Element.ROW;
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}
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}
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/// <summary>
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/// Gets all the chunks in this element.
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/// </summary>
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/// <value>an ArrayList</value>
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public ArrayList Chunks {
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get {
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return new ArrayList();
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}
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}
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/**
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* @see com.lowagie.text.Element#isContent()
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* @since iText 2.0.8
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*/
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public bool IsContent() {
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return true;
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}
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/**
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* @see com.lowagie.text.Element#isNestable()
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* @since iText 2.0.8
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*/
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public bool IsNestable() {
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return false;
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}
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/// <summary>
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/// Deletes a certain column has been deleted.
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/// </summary>
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/// <param name="column">the number of the column to delete</param>
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internal void DeleteColumn(int column) {
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if ((column >= columns) || (column < 0)) {
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throw new Exception("getCell at illegal index : " + column);
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}
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columns--;
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bool[] newReserved = new bool[columns];
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Object[] newCells = new Cell[columns];
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for (int i = 0; i < column; i++) {
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newReserved[i] = reserved[i];
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newCells[i] = cells[i];
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if (newCells[i] != null && (i + ((Cell) newCells[i]).Colspan > column)) {
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((Cell) newCells[i]).Colspan = ((Cell) cells[i]).Colspan - 1;
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}
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}
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for (int i = column; i < columns; i++) {
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newReserved[i] = reserved[i + 1];
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newCells[i] = cells[i + 1];
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}
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if (cells[column] != null && ((Cell) cells[column]).Colspan > 1) {
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newCells[column] = cells[column];
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((Cell) newCells[column]).Colspan = ((Cell) newCells[column]).Colspan - 1;
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}
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reserved = newReserved;
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cells = newCells;
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}
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// methods
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/// <summary>
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/// Adds a Cell to the Row.
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/// </summary>
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/// <param name="element">the element to add (currently only Cells and Tables supported)</param>
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/// <returns>
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/// the column position the Cell was added,
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/// or -1 if the element couldn't be added.
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/// </returns>
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internal int AddElement(Object element) {
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return AddElement(element, currentColumn);
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}
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/// <summary>
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/// Adds an element to the Row at the position given.
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/// </summary>
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/// <param name="element">the element to add. (currently only Cells and Tables supported</param>
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/// <param name="column">the position where to add the cell</param>
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/// <returns>
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/// the column position the Cell was added,
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/// or -1 if the Cell couldn't be added.
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/// </returns>
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internal int AddElement(Object element, int column) {
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if (element == null) throw new Exception("addCell - null argument");
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if ((column < 0) || (column > columns)) throw new Exception("addCell - illegal column argument");
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if ( !((GetObjectID(element) == CELL) || (GetObjectID(element) == TABLE)) ) throw new ArgumentException("addCell - only Cells or Tables allowed");
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int lColspan = ((element is Cell) ? ((Cell)element).Colspan : 1);
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if (!Reserve(column, lColspan)) {
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return -1;
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}
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cells[column] = element;
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currentColumn += lColspan - 1;
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return column;
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}
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/// <summary>
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/// Puts Cell to the Row at the position given, doesn't reserve colspan.
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/// </summary>
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/// <param name="aElement">the cell to add.</param>
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/// <param name="column">the position where to add the cell.</param>
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internal void SetElement(Object aElement, int column) {
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if (reserved[column]) throw new ArgumentException("setElement - position already taken");
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cells[column] = aElement;
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if (aElement != null) {
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reserved[column] = true;
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}
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}
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/// <summary>
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/// Reserves a Cell in the Row.
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/// </summary>
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/// <param name="column">the column that has to be reserved.</param>
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/// <returns>true if the column was reserved, false if not.</returns>
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internal bool Reserve(int column) {
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return Reserve(column, 1);
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}
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/// <summary>
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/// Reserves a Cell in the Row.
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/// </summary>
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/// <param name="column">the column that has to be reserved.</param>
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/// <param name="size">the number of columns</param>
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/// <returns>true if the column was reserved, false if not.</returns>
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internal bool Reserve(int column, int size) {
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if ((column < 0) || ((column + size) > columns)) throw new Exception("reserve - incorrect column/size");
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for (int i=column; i < column + size; i++) {
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if (reserved[i]) {
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// undo reserve
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for (int j=i; j >= column; j--) {
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reserved[j] = false;
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}
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return false;
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}
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reserved[i] = true;
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}
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return true;
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}
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// methods to retrieve information
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/// <summary>
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/// Returns true/false when this position in the Row has been reserved, either filled or through a colspan of an Element.
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/// </summary>
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/// <param name="column">the column.</param>
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/// <returns>true if the column was reserved, false if not.</returns>
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internal bool IsReserved(int column) {
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return reserved[column];
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}
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/// <summary>
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/// Returns the type-id of the element in a Row.
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/// </summary>
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/// <param name="column">the column of which you'd like to know the type</param>
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/// <returns>the element id</returns>
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int GetElementID(int column) {
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if (cells[column] == null) return NULL;
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else if (cells[column] is Cell) return CELL;
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else if (cells[column] is Table) return TABLE;
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return -1;
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}
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/// <summary>
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/// Returns the type-id of an Object.
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/// </summary>
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/// <param name="element"></param>
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/// <returns>the object of which you'd like to know the type-id, -1 if invalid</returns>
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int GetObjectID(Object element) {
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if (element == null) return NULL;
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else if (element is Cell) return CELL;
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else if (element is Table) return TABLE;
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return -1;
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}
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/// <summary>
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/// Gets a Cell or Table from a certain column.
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/// </summary>
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/// <param name="column">the column the Cell/Table is in.</param>
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/// <returns>
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/// the Cell,Table or Object if the column was
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/// reserved or null if empty.
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/// </returns>
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public Object GetCell(int column) {
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if ((column < 0) || (column > columns)) {
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throw new Exception("getCell at illegal index :" + column + " max is " + columns);
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}
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return cells[column];
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}
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/// <summary>
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/// Checks if the row is empty.
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/// </summary>
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/// <returns>true if none of the columns is reserved.</returns>
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public bool IsEmpty() {
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for (int i = 0; i < columns; i++) {
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if (cells[i] != null) {
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return false;
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}
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}
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return true;
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}
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/// <summary>
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/// Gets the number of columns.
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/// </summary>
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/// <value>a value</value>
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public int Columns {
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get {
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return columns;
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}
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}
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/// <summary>
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/// Gets the horizontal Element.
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/// </summary>
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/// <value>a value</value>
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public int HorizontalAlignment {
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get {
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return horizontalAlignment;
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}
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set {
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horizontalAlignment = value;
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}
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}
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public override string ToString() {
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return base.ToString();
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}
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}
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}
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