/*
* $Id$
*
* Copyright 2007 Bruno Lowagie and Wil
*
* The contents of this file are subject to the Mozilla Public License Version 1.1
* (the "License"); you may not use this file except in compliance with the License.
* You may obtain a copy of the License at http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the License.
*
* The Original Code is 'iText, a free JAVA-PDF library'.
*
* The Initial Developer of the Original Code is Bruno Lowagie. Portions created by
* the Initial Developer are Copyright (C) 1999, 2000, 2001, 2002 by Bruno Lowagie.
* All Rights Reserved.
* Co-Developer of the code is Paulo Soares. Portions created by the Co-Developer
* are Copyright (C) 2000, 2001, 2002 by Paulo Soares. All Rights Reserved.
*
* Contributor(s): all the names of the contributors are added in the source code
* where applicable.
*
* Alternatively, the contents of this file may be used under the terms of the
* LGPL license (the "GNU LIBRARY GENERAL PUBLIC LICENSE"), in which case the
* provisions of LGPL are applicable instead of those above. If you wish to
* allow use of your version of this file only under the terms of the LGPL
* License and not to allow others to use your version of this file under
* the MPL, indicate your decision by deleting the provisions above and
* replace them with the notice and other provisions required by the LGPL.
* If you do not delete the provisions above, a recipient may use your version
* of this file under either the MPL or the GNU LIBRARY GENERAL PUBLIC LICENSE.
*
* This library is free software; you can redistribute it and/or modify it
* under the terms of the MPL as stated above or under the terms of the GNU
* Library General Public License as published by the Free Software Foundation;
* either version 2 of the License, or any later version.
*
* This library 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 Library general Public License for more
* details.
*
* If you didn't download this code from the following link, you should check if
* you aren't using an obsolete version:
* http://www.lowagie.com/iText/
*/
package com.lowagie.text.pdf.internal;
import java.awt.geom.AffineTransform;
import java.awt.geom.PathIterator;
import java.util.NoSuchElementException;
import com.lowagie.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++;
}
}