/*
* org.openmicroscopy.shoola.util.roi.io.util.SVGTransform
*
*------------------------------------------------------------------------------
* Copyright (C) 2006-2007 University of Dundee. All rights reserved.
*
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
* 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
*------------------------------------------------------------------------------
*/
package org.openmicroscopy.shoola.util.roi.io.util;
//Java imports
import java.awt.geom.AffineTransform;
import java.io.IOException;
import java.io.StreamTokenizer;
import java.io.StringReader;
//Third-party libraries
//Application-internal dependencies
/**
*
*
* @author Jean-Marie Burel
* <a href="mailto:j.burel@dundee.ac.uk">j.burel@dundee.ac.uk</a>
* @author Donald MacDonald
* <a href="mailto:donald@lifesci.dundee.ac.uk">donald@lifesci.dundee.ac.uk</a>
* @version 3.0
* <small>
* (<b>Internal version:</b> $Revision: $Date: $)
* </small>
* @since OME3.0
*/
public class SVGTransform
{
public static AffineTransform toTransform(String str) throws IOException
{
AffineTransform t = new AffineTransform();
if (str != null && ! str.equals("none"))
{
StreamTokenizer tt = new StreamTokenizer(new StringReader(str));
tt.resetSyntax();
tt.wordChars('a', 'z');
tt.wordChars('A', 'Z');
tt.wordChars(128 + 32, 255);
tt.whitespaceChars(0, ' ');
tt.whitespaceChars(',', ',');
tt.parseNumbers();
while (tt.nextToken() != StreamTokenizer.TT_EOF)
{
if (tt.ttype != StreamTokenizer.TT_WORD)
{
throw new IOException("Illegal transform "+str);
}
String type = tt.sval;
if (tt.nextToken() != '(')
{
throw new IOException("'(' not found in transform "+str);
}
if (type.equals("matrix"))
{
double[] m = new double[6];
for (int i=0; i < 6; i++)
{
if (tt.nextToken() != StreamTokenizer.TT_NUMBER)
{
throw new IOException("Matrix value "+i+" not found in transform "+str+" token:"+tt.ttype+" "+tt.sval);
}
m[i] = tt.nval;
if (tt.nextToken() == StreamTokenizer.TT_WORD &&
(tt.sval.startsWith("E") || tt.sval.startsWith("e")))
{
double mantissa = tt.nval;
m[i] = Double.valueOf(m[i] + tt.sval);
}
else
{
tt.pushBack();
}
}
t.concatenate(new AffineTransform(m));
}
else if (type.equals("translate"))
{
double tx, ty;
if (tt.nextToken() != StreamTokenizer.TT_NUMBER)
{
throw new IOException("X-translation value not found in transform "+str);
}
tx = tt.nval;
if (tt.nextToken() == StreamTokenizer.TT_WORD &&
(tt.sval.startsWith("E") || tt.sval.startsWith("e")))
{
double mantissa = tt.nval;
tx = Double.valueOf(tx + tt.sval);
}
else
{
tt.pushBack();
}
if (tt.nextToken() == StreamTokenizer.TT_NUMBER)
{
ty = tt.nval;
if (tt.nextToken() == StreamTokenizer.TT_WORD &&
(tt.sval.startsWith("E") || tt.sval.startsWith("e")))
{
double mantissa = tt.nval;
ty = Double.valueOf(ty + tt.sval);
}
else
{
tt.pushBack();
}
}
else
{
tt.pushBack();
ty = 0;
}
t.translate(tx, ty);
}
else if (type.equals("scale"))
{
double sx, sy;
if (tt.nextToken() != StreamTokenizer.TT_NUMBER)
{
throw new IOException("X-scale value not found in transform "+str);
}
sx = tt.nval;
if (tt.nextToken() == StreamTokenizer.TT_WORD &&
(tt.sval.startsWith("E") || tt.sval.startsWith("e")))
{
double mantissa = tt.nval;
sx = Double.valueOf(sx + tt.sval);
}
else
{
tt.pushBack();
}
if (tt.nextToken() == StreamTokenizer.TT_NUMBER)
{
sy = tt.nval;
if (tt.nextToken() == StreamTokenizer.TT_WORD &&
(tt.sval.startsWith("E") || tt.sval.startsWith("e")))
{
double mantissa = tt.nval;
sy = Double.valueOf(sy + tt.sval);
}
else
{
tt.pushBack();
}
}
else
{
tt.pushBack();
sy = sx;
}
t.scale(sx, sy);
}
else if (type.equals("rotate"))
{
double angle, cx, cy;
if (tt.nextToken() != StreamTokenizer.TT_NUMBER)
{
throw new IOException("Angle value not found in transform "+str);
}
angle = tt.nval;
if (tt.nextToken() == StreamTokenizer.TT_WORD &&
(tt.sval.startsWith("E") || tt.sval.startsWith("e")))
{
double mantissa = tt.nval;
angle = Double.valueOf(angle + tt.sval);
}
else
{
tt.pushBack();
}
if (tt.nextToken() == StreamTokenizer.TT_NUMBER)
{
cx = tt.nval;
if (tt.nextToken() == StreamTokenizer.TT_WORD &&
(tt.sval.startsWith("E") || tt.sval.startsWith("e")))
{
double mantissa = tt.nval;
cx = Double.valueOf(cx + tt.sval);
}
else
{
tt.pushBack();
}
if (tt.nextToken() != StreamTokenizer.TT_NUMBER)
{
throw new IOException("Y-center value not found in transform "+str);
}
cy = tt.nval;
if (tt.nextToken() == StreamTokenizer.TT_WORD &&
(tt.sval.startsWith("E") || tt.sval.startsWith("e")))
{
double mantissa = tt.nval;
cy = Double.valueOf(cy + tt.sval);
}
else
{
tt.pushBack();
}
}
else
{
tt.pushBack();
cx = cy = 0;
}
t.rotate(angle * Math.PI / 180d, cx * Math.PI / 180d, cy * Math.PI / 180d);
}
else if (type.equals("skewX"))
{
double angle;
if (tt.nextToken() != StreamTokenizer.TT_NUMBER)
{
throw new IOException("Skew angle not found in transform "+str);
}
angle = tt.nval;
if (tt.nextToken() == StreamTokenizer.TT_WORD &&
(tt.sval.startsWith("E") || tt.sval.startsWith("e")))
{
double mantissa = tt.nval;
angle = Double.valueOf(angle + tt.sval);
}
else
{
tt.pushBack();
}
t.concatenate(new AffineTransform(
1, 0, Math.tan(angle * Math.PI / 180), 1, 0, 0
));
}
else if (type.equals("skewY"))
{
double angle;
if (tt.nextToken() != StreamTokenizer.TT_NUMBER)
{
throw new IOException("Skew angle not found in transform "+str);
}
angle = tt.nval;
if (tt.nextToken() == StreamTokenizer.TT_WORD &&
(tt.sval.startsWith("E") || tt.sval.startsWith("e")))
{
double mantissa = tt.nval;
angle = Double.valueOf(angle + tt.sval);
}
else
{
tt.pushBack();
}
t.concatenate(new AffineTransform(
1, Math.tan(angle * Math.PI / 180), 0, 1, 0, 0
));
}
else
{
throw new IOException("Unknown transform "+type+" in "+str);
}
if (tt.nextToken() != ')')
{
throw new IOException("')' not found in transform "+str);
}
}
}
return t;
}
}