1 /* 2 * $Id$ 3 * 4 * Copyright 2007 Bruno Lowagie and Wil 5 * 6 * The contents of this file are subject to the Mozilla Public License Version 1.1 7 * (the "License"); you may not use this file except in compliance with the License. 8 * You may obtain a copy of the License at http://www.mozilla.org/MPL/ 9 * 10 * Software distributed under the License is distributed on an "AS IS" basis, 11 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License 12 * for the specific language governing rights and limitations under the License. 13 * 14 * The Original Code is 'iText, a free JAVA-PDF library'. 15 * 16 * The Initial Developer of the Original Code is Bruno Lowagie. Portions created by 17 * the Initial Developer are Copyright (C) 1999, 2000, 2001, 2002 by Bruno Lowagie. 18 * All Rights Reserved. 19 * Co-Developer of the code is Paulo Soares. Portions created by the Co-Developer 20 * are Copyright (C) 2000, 2001, 2002 by Paulo Soares. All Rights Reserved. 21 * 22 * Contributor(s): all the names of the contributors are added in the source code 23 * where applicable. 24 * 25 * Alternatively, the contents of this file may be used under the terms of the 26 * LGPL license (the "GNU LIBRARY GENERAL PUBLIC LICENSE"), in which case the 27 * provisions of LGPL are applicable instead of those above. If you wish to 28 * allow use of your version of this file only under the terms of the LGPL 29 * License and not to allow others to use your version of this file under 30 * the MPL, indicate your decision by deleting the provisions above and 31 * replace them with the notice and other provisions required by the LGPL. 32 * If you do not delete the provisions above, a recipient may use your version 33 * of this file under either the MPL or the GNU LIBRARY GENERAL PUBLIC LICENSE. 34 * 35 * This library is free software; you can redistribute it and/or modify it 36 * under the terms of the MPL as stated above or under the terms of the GNU 37 * Library General Public License as published by the Free Software Foundation; 38 * either version 2 of the License, or any later version. 39 * 40 * This library is distributed in the hope that it will be useful, but WITHOUT 41 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS 42 * FOR A PARTICULAR PURPOSE. See the GNU Library general Public License for more 43 * details. 44 * 45 * If you didn't download this code from the following link, you should check if 46 * you aren't using an obsolete version: 47 * http://www.lowagie.com/iText/ 48 */ 49 50 package com.lowagie.text.pdf.internal; 51 52 import java.awt.geom.AffineTransform; 53 import java.awt.geom.PathIterator; 54 import java.util.NoSuchElementException; 55 import com.lowagie.text.error_messages.MessageLocalization; 56 /** 57 * PathIterator for PolylineShape. 58 * This class was originally written by wil - amristar.com.au 59 * and integrated into iText by Bruno. 60 */ 61 public class PolylineShapeIterator implements PathIterator { 62 /** The polyline over which we are going to iterate. */ 63 protected PolylineShape poly; 64 /** an affine transformation to be performed on the polyline. */ 65 protected AffineTransform affine; 66 /** the index of the current segment in the iterator. */ 67 protected int index; 68 69 /** Creates a PolylineShapeIterator. */ PolylineShapeIterator(PolylineShape l, AffineTransform at)70 PolylineShapeIterator(PolylineShape l, AffineTransform at) { 71 this.poly = l; 72 this.affine = at; 73 } 74 75 /** 76 * Returns the coordinates and type of the current path segment in 77 * the iteration. The return value is the path segment type: 78 * SEG_MOVETO, SEG_LINETO, SEG_QUADTO, SEG_CUBICTO, or SEG_CLOSE. 79 * A double array of length 6 must be passed in and may be used to 80 * store the coordinates of the point(s). 81 * Each point is stored as a pair of double x,y coordinates. 82 * SEG_MOVETO and SEG_LINETO types will return one point, 83 * SEG_QUADTO will return two points, 84 * SEG_CUBICTO will return 3 points 85 * and SEG_CLOSE will not return any points. 86 * @see #SEG_MOVETO 87 * @see #SEG_LINETO 88 * @see #SEG_QUADTO 89 * @see #SEG_CUBICTO 90 * @see #SEG_CLOSE 91 * @see java.awt.geom.PathIterator#currentSegment(double[]) 92 */ currentSegment(double[] coords)93 public int currentSegment(double[] coords) { 94 if (isDone()) { 95 throw new NoSuchElementException(MessageLocalization.getComposedMessage("line.iterator.out.of.bounds")); 96 } 97 int type = (index==0)?SEG_MOVETO:SEG_LINETO; 98 coords[0] = poly.x[index]; 99 coords[1] = poly.y[index]; 100 if (affine != null) { 101 affine.transform(coords, 0, coords, 0, 1); 102 } 103 return type; 104 } 105 106 /** 107 * Returns the coordinates and type of the current path segment in 108 * the iteration. The return value is the path segment type: 109 * SEG_MOVETO, SEG_LINETO, SEG_QUADTO, SEG_CUBICTO, or SEG_CLOSE. 110 * A double array of length 6 must be passed in and may be used to 111 * store the coordinates of the point(s). 112 * Each point is stored as a pair of double x,y coordinates. 113 * SEG_MOVETO and SEG_LINETO types will return one point, 114 * SEG_QUADTO will return two points, 115 * SEG_CUBICTO will return 3 points 116 * and SEG_CLOSE will not return any points. 117 * @see #SEG_MOVETO 118 * @see #SEG_LINETO 119 * @see #SEG_QUADTO 120 * @see #SEG_CUBICTO 121 * @see #SEG_CLOSE 122 * @see java.awt.geom.PathIterator#currentSegment(float[]) 123 */ currentSegment(float[] coords)124 public int currentSegment(float[] coords) { 125 if (isDone()) { 126 throw new NoSuchElementException(MessageLocalization.getComposedMessage("line.iterator.out.of.bounds")); 127 } 128 int type = (index==0)?SEG_MOVETO:SEG_LINETO; 129 coords[0] = poly.x[index]; 130 coords[1] = poly.y[index]; 131 if (affine != null) { 132 affine.transform(coords, 0, coords, 0, 1); 133 } 134 return type; 135 } 136 137 /** 138 * Return the winding rule for determining the insideness of the 139 * path. 140 * @see #WIND_EVEN_ODD 141 * @see #WIND_NON_ZERO 142 * @see java.awt.geom.PathIterator#getWindingRule() 143 */ getWindingRule()144 public int getWindingRule() { 145 return WIND_NON_ZERO; 146 } 147 148 /** 149 * Tests if there are more points to read. 150 * @return true if there are more points to read 151 * @see java.awt.geom.PathIterator#isDone() 152 */ isDone()153 public boolean isDone() { 154 return (index >= poly.np); 155 } 156 157 /** 158 * Moves the iterator to the next segment of the path forwards 159 * along the primary direction of traversal as long as there are 160 * more points in that direction. 161 * @see java.awt.geom.PathIterator#next() 162 */ next()163 public void next() { 164 index++; 165 } 166 167 } 168