/*
* $Id: PolylineShape.java 4784 2011-03-15 08:33:00Z blowagie $
*
* This file is part of the iText (R) project.
* Copyright (c) 1998-2011 1T3XT BVBA
* Authors: Bruno Lowagie, Paulo Soares, et al.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License version 3
* as published by the Free Software Foundation with the addition of the
* following permission added to Section 15 as permitted in Section 7(a):
* FOR ANY PART OF THE COVERED WORK IN WHICH THE COPYRIGHT IS OWNED BY 1T3XT,
* 1T3XT DISCLAIMS THE WARRANTY OF NON INFRINGEMENT OF THIRD PARTY RIGHTS.
*
* This program 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 Affero General Public License for more details.
* You should have received a copy of the GNU Affero General Public License
* along with this program; if not, see http://www.gnu.org/licenses or write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA, 02110-1301 USA, or download the license from the following URL:
* http://itextpdf.com/terms-of-use/
*
* The interactive user interfaces in modified source and object code versions
* of this program must display Appropriate Legal Notices, as required under
* Section 5 of the GNU Affero General Public License.
*
* In accordance with Section 7(b) of the GNU Affero General Public License,
* a covered work must retain the producer line in every PDF that is created
* or manipulated using iText.
*
* You can be released from the requirements of the license by purchasing
* a commercial license. Buying such a license is mandatory as soon as you
* develop commercial activities involving the iText software without
* disclosing the source code of your own applications.
* These activities include: offering paid services to customers as an ASP,
* serving PDFs on the fly in a web application, shipping iText with a closed
* source product.
*
* For more information, please contact iText Software Corp. at this
* address: [email protected]
*/
package com.itextpdf.text.pdf.internal;
import java.awt.Shape;
import java.awt.Rectangle;
import java.awt.geom.AffineTransform;
import java.awt.geom.PathIterator;
import java.awt.geom.Line2D;
import java.awt.geom.Point2D;
import java.awt.geom.Rectangle2D;
/**
* Class that defines a Polyline shape.
* This class was originally written by wil - amristar.com.au
* and integrated into iText by Bruno.
*/
public class PolylineShape implements Shape {
/** All the X-values of the coordinates in the polyline. */
protected int[] x;
/** All the Y-values of the coordinates in the polyline. */
protected int[] y;
/** The total number of points. */
protected int np;
/** Creates a PolylineShape. */
public PolylineShape(int[] x, int[] y, int nPoints) {
// Should copy array (as done in Polygon)
this.np = nPoints;
// Take a copy.
this.x = new int[np];
this.y = new int[np];
System.arraycopy(x, 0, this.x, 0, np);
System.arraycopy(y, 0, this.y, 0, np);
}
/**
* Returns the bounding box of this polyline.
*
* @return a {@link Rectangle2D} that is the high-precision
* bounding box of this line.
* @see java.awt.Shape#getBounds2D()
*/
public Rectangle2D getBounds2D() {
int[] r = rect();
return r==null?null:new Rectangle2D.Double(r[0], r[1], r[2], r[3]);
}
/**
* Returns the bounding box of this polyline.
* @see java.awt.Shape#getBounds()
*/
public Rectangle getBounds() {
return getBounds2D().getBounds();
}
/**
* Calculates the origin (X, Y) and the width and height
* of a rectangle that contains all the segments of the
* polyline.
*/
private int[] rect() {
if(np==0)return null;
int xMin = x[0], yMin=y[0], xMax=x[0],yMax=y[0];
for(int i=1;i<np;i++) {
if(x[i]<xMin)xMin=x[i];
else if(x[i]>xMax)xMax=x[i];
if(y[i]<yMin)yMin=y[i];
else if(y[i]>yMax)yMax=y[i];
}
return new int[] { xMin, yMin, xMax-xMin, yMax-yMin };
}
/**
* A polyline can't contain a point.
* @see java.awt.Shape#contains(double, double)
*/
public boolean contains(double x, double y) { return false; }
/**
* A polyline can't contain a point.
* @see java.awt.Shape#contains(java.awt.geom.Point2D)
*/
public boolean contains(Point2D p) { return false; }
/**
* A polyline can't contain a point.
* @see java.awt.Shape#contains(double, double, double, double)
*/
public boolean contains(double x, double y, double w, double h) { return false; }
/**
* A polyline can't contain a point.
* @see java.awt.Shape#contains(java.awt.geom.Rectangle2D)
*/
public boolean contains(Rectangle2D r) { return false; }
/**
* Checks if one of the lines in the polyline intersects
* with a given rectangle.
* @see java.awt.Shape#intersects(double, double, double, double)
*/
public boolean intersects(double x, double y, double w, double h) {
return intersects(new Rectangle2D.Double(x, y, w, h));
}
/**
* Checks if one of the lines in the polyline intersects
* with a given rectangle.
* @see java.awt.Shape#intersects(java.awt.geom.Rectangle2D)
*/
public boolean intersects(Rectangle2D r) {
if(np==0)return false;
Line2D line = new Line2D.Double(x[0],y[0],x[0],y[0]);
for (int i = 1; i < np; i++) {
line.setLine(x[i-1], y[i-1], x[i], y[i]);
if(line.intersects(r))return true;
}
return false;
}
/**
* Returns an iteration object that defines the boundary of the polyline.
* @param at the specified {@link AffineTransform}
* @return a {@link PathIterator} that defines the boundary of this polyline.
* @see java.awt.Shape#intersects(java.awt.geom.Rectangle2D)
*/
public PathIterator getPathIterator(AffineTransform at) {
return new PolylineShapeIterator(this, at);
}
/**
* There's no difference with getPathIterator(AffineTransform at);
* we just need this method to implement the Shape interface.
*/
public PathIterator getPathIterator(AffineTransform at, double flatness) {
return new PolylineShapeIterator(this, at);
}
}
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