001/* 002 * $Id: TextMarginFinder.java 4784 2011-03-15 08:33:00Z blowagie $ 003 * 004 * This file is part of the iText (R) project. 005 * Copyright (c) 1998-2011 1T3XT BVBA 006 * Authors: Bruno Lowagie, et al. 007 * 008 * This program is free software; you can redistribute it and/or modify 009 * it under the terms of the GNU Affero General Public License version 3 010 * as published by the Free Software Foundation with the addition of the 011 * following permission added to Section 15 as permitted in Section 7(a): 012 * FOR ANY PART OF THE COVERED WORK IN WHICH THE COPYRIGHT IS OWNED BY 1T3XT, 013 * 1T3XT DISCLAIMS THE WARRANTY OF NON INFRINGEMENT OF THIRD PARTY RIGHTS. 014 * 015 * This program is distributed in the hope that it will be useful, but 016 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 017 * or FITNESS FOR A PARTICULAR PURPOSE. 018 * See the GNU Affero General Public License for more details. 019 * You should have received a copy of the GNU Affero General Public License 020 * along with this program; if not, see http://www.gnu.org/licenses or write to 021 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, 022 * Boston, MA, 02110-1301 USA, or download the license from the following URL: 023 * http://itextpdf.com/terms-of-use/ 024 * 025 * The interactive user interfaces in modified source and object code versions 026 * of this program must display Appropriate Legal Notices, as required under 027 * Section 5 of the GNU Affero General Public License. 028 * 029 * In accordance with Section 7(b) of the GNU Affero General Public License, 030 * a covered work must retain the producer line in every PDF that is created 031 * or manipulated using iText. 032 * 033 * You can be released from the requirements of the license by purchasing 034 * a commercial license. Buying such a license is mandatory as soon as you 035 * develop commercial activities involving the iText software without 036 * disclosing the source code of your own applications. 037 * These activities include: offering paid services to customers as an ASP, 038 * serving PDFs on the fly in a web application, shipping iText with a closed 039 * source product. 040 * 041 * For more information, please contact iText Software Corp. at this 042 * address: sales@itextpdf.com 043 */ 044package com.itextpdf.text.pdf.parser; 045 046import java.awt.geom.Rectangle2D; 047 048/** 049 * Allows you to find the rectangle that contains all the text in a page. 050 * @since 5.0.2 051 */ 052public class TextMarginFinder implements RenderListener { 053 private Rectangle2D.Float textRectangle = null; 054 055 /** 056 * Method invokes by the PdfContentStreamProcessor. 057 * Passes a TextRenderInfo for every text chunk that is encountered. 058 * We'll use this object to obtain coordinates. 059 * @see com.itextpdf.text.pdf.parser.RenderListener#renderText(com.itextpdf.text.pdf.parser.TextRenderInfo) 060 */ 061 public void renderText(TextRenderInfo renderInfo) { 062 if (textRectangle == null) 063 textRectangle = renderInfo.getDescentLine().getBoundingRectange(); 064 else 065 textRectangle.add(renderInfo.getDescentLine().getBoundingRectange()); 066 067 textRectangle.add(renderInfo.getAscentLine().getBoundingRectange()); 068 069 } 070 071 /** 072 * Getter for the left margin. 073 * @return the X position of the left margin 074 */ 075 public float getLlx() { 076 return textRectangle.x; 077 } 078 079 /** 080 * Getter for the bottom margin. 081 * @return the Y position of the bottom margin 082 */ 083 public float getLly() { 084 return textRectangle.y; 085 } 086 087 /** 088 * Getter for the right margin. 089 * @return the X position of the right margin 090 */ 091 public float getUrx() { 092 return textRectangle.x + textRectangle.width; 093 } 094 095 /** 096 * Getter for the top margin. 097 * @return the Y position of the top margin 098 */ 099 public float getUry() { 100 return textRectangle.y + textRectangle.height; 101 } 102 103 /** 104 * Gets the width of the text block. 105 * @return a width 106 */ 107 public float getWidth() { 108 return textRectangle.width; 109 } 110 111 /** 112 * Gets the height of the text block. 113 * @return a height 114 */ 115 public float getHeight() { 116 return textRectangle.height; 117 } 118 119 /** 120 * @see com.itextpdf.text.pdf.parser.RenderListener#beginTextBlock() 121 */ 122 public void beginTextBlock() { 123 // do nothing 124 } 125 126 /** 127 * @see com.itextpdf.text.pdf.parser.RenderListener#endTextBlock() 128 */ 129 public void endTextBlock() { 130 // do nothing 131 } 132 133 /** 134 * @see com.itextpdf.text.pdf.parser.RenderListener#renderImage(com.itextpdf.text.pdf.parser.ImageRenderInfo) 135 */ 136 public void renderImage(ImageRenderInfo renderInfo) { 137 // do nothing 138 } 139}