/*
* $Id: PolylineShapeIterator.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.geom.AffineTransform;
import java.awt.geom.PathIterator;
import java.util.NoSuchElementException;
import com.itextpdf.text.error_messages.MessageLocalization;
/**
* PathIterator for PolylineShape.
* This class was originally written by wil - amristar.com.au
* and integrated into iText by Bruno.
*/
public class PolylineShapeIterator implements PathIterator {
/** The polyline over which we are going to iterate. */
protected PolylineShape poly;
/** an affine transformation to be performed on the polyline. */
protected AffineTransform affine;
/** the index of the current segment in the iterator. */
protected int index;
/** Creates a PolylineShapeIterator. */
PolylineShapeIterator(PolylineShape l, AffineTransform at) {
this.poly = l;
this.affine = at;
}
/**
* Returns the coordinates and type of the current path segment in
* the iteration. The return value is the path segment type:
* SEG_MOVETO, SEG_LINETO, SEG_QUADTO, SEG_CUBICTO, or SEG_CLOSE.
* A double array of length 6 must be passed in and may be used to
* store the coordinates of the point(s).
* Each point is stored as a pair of double x,y coordinates.
* SEG_MOVETO and SEG_LINETO types will return one point,
* SEG_QUADTO will return two points,
* SEG_CUBICTO will return 3 points
* and SEG_CLOSE will not return any points.
* @see #SEG_MOVETO
* @see #SEG_LINETO
* @see #SEG_QUADTO
* @see #SEG_CUBICTO
* @see #SEG_CLOSE
* @see java.awt.geom.PathIterator#currentSegment(double[])
*/
public int currentSegment(double[] coords) {
if (isDone()) {
throw new NoSuchElementException(MessageLocalization.getComposedMessage("line.iterator.out.of.bounds"));
}
int type = (index==0)?SEG_MOVETO:SEG_LINETO;
coords[0] = poly.x[index];
coords[1] = poly.y[index];
if (affine != null) {
affine.transform(coords, 0, coords, 0, 1);
}
return type;
}
/**
* Returns the coordinates and type of the current path segment in
* the iteration. The return value is the path segment type:
* SEG_MOVETO, SEG_LINETO, SEG_QUADTO, SEG_CUBICTO, or SEG_CLOSE.
* A double array of length 6 must be passed in and may be used to
* store the coordinates of the point(s).
* Each point is stored as a pair of double x,y coordinates.
* SEG_MOVETO and SEG_LINETO types will return one point,
* SEG_QUADTO will return two points,
* SEG_CUBICTO will return 3 points
* and SEG_CLOSE will not return any points.
* @see #SEG_MOVETO
* @see #SEG_LINETO
* @see #SEG_QUADTO
* @see #SEG_CUBICTO
* @see #SEG_CLOSE
* @see java.awt.geom.PathIterator#currentSegment(float[])
*/
public int currentSegment(float[] coords) {
if (isDone()) {
throw new NoSuchElementException(MessageLocalization.getComposedMessage("line.iterator.out.of.bounds"));
}
int type = (index==0)?SEG_MOVETO:SEG_LINETO;
coords[0] = poly.x[index];
coords[1] = poly.y[index];
if (affine != null) {
affine.transform(coords, 0, coords, 0, 1);
}
return type;
}
/**
* Return the winding rule for determining the insideness of the
* path.
* @see #WIND_EVEN_ODD
* @see #WIND_NON_ZERO
* @see java.awt.geom.PathIterator#getWindingRule()
*/
public int getWindingRule() {
return WIND_NON_ZERO;
}
/**
* Tests if there are more points to read.
* @return true if there are more points to read
* @see java.awt.geom.PathIterator#isDone()
*/
public boolean isDone() {
return (index >= poly.np);
}
/**
* Moves the iterator to the next segment of the path forwards
* along the primary direction of traversal as long as there are
* more points in that direction.
* @see java.awt.geom.PathIterator#next()
*/
public void next() {
index++;
}
}
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