/*

  * Copyright 2007 - 2007 JEuclid, http://jeuclid.sf.net

  * 

  * Licensed under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0

  *

  * Unless required by applicable law or agreed to in writing, software

  * distributed under the License is distributed on an "AS IS" BASIS,

  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

  * See the License for the specific language governing permissions and

  * limitations under the License.

  */

 /* $Id: FreeHepConverter.java,v 1d64d806165c 2009/04/09 07:17:07 maxberger $ */

 package net.sourceforge.jeuclid.converter;

 import java.awt.Dimension;

 import java.io.ByteArrayOutputStream;

 import java.io.IOException;

 import java.io.OutputStream;

 import java.lang.reflect.Constructor;

 import java.lang.reflect.InvocationTargetException;

 import net.sourceforge.jeuclid.LayoutContext;

 import net.sourceforge.jeuclid.layout.JEuclidView;

 import org.freehep.graphics2d.VectorGraphics;

 import org.w3c.dom.Node;

 /**

  * Converter for output formats supported by FreeHEP.

  * 

  * @version $Revision: 1d64d806165c $

  */

 public class FreeHepConverter implements ConverterPlugin {

     private final Constructor<VectorGraphics> streamConst;

     @SuppressWarnings("unchecked")

     FreeHepConverter(final Class<?> converterClass)

             throws NoSuchMethodException {

         this.streamConst = ((Class<VectorGraphics>) converterClass)

                 .getConstructor(OutputStream.class, Dimension.class);

     }

     /** {@inheritDoc} */

     public Dimension convert(final Node doc, final LayoutContext context,

             final OutputStream outStream) throws IOException {

         final VectorGraphics tempg = this.createGraphics(

                 new ByteArrayOutputStream(), new Dimension(1, 1));

         final JEuclidView view = new JEuclidView(doc, context, tempg);

         final int ascent = (int) Math.ceil(view.getAscentHeight());

         final Dimension size = new Dimension(

                 (int) Math.ceil(view.getWidth()), (int) Math.ceil(view

                         .getDescentHeight())

                         + ascent);

         final VectorGraphics g = this.createGraphics(outStream, size);

         g.setCreator("JEuclid (from MathML)");

         g.startExport();

         view.draw(g, 0, ascent);

         g.endExport();

         return size;

     }

     /** {@inheritDoc} */

     public DocumentWithDimension convert(final Node doc,

             final LayoutContext context) {

         return null;

     }

     private VectorGraphics createGraphics(final OutputStream os,

             final Dimension d) throws IOException {

         try {

             return this.streamConst.newInstance(os, d);

         } catch (final InvocationTargetException e) {

             throw new IOException(e.toString());

         } catch (final IllegalArgumentException e) {

             throw new IOException(e.toString());

         } catch (final InstantiationException e) {

             throw new IOException(e.toString());

         } catch (final IllegalAccessException e) {

             throw new IOException(e.toString());

         }

     }

 }