001    /*
002     * Copyright 2002 - 2008 JEuclid, http://jeuclid.sf.net
003     *
004     * Licensed under the Apache License, Version 2.0 (the "License");
005     * you may not use this file except in compliance with the License.
006     * You may obtain a copy of the License at
007     *
008     *      http://www.apache.org/licenses/LICENSE-2.0
009     *
010     * Unless required by applicable law or agreed to in writing, software
011     * distributed under the License is distributed on an "AS IS" BASIS,
012     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013     * See the License for the specific language governing permissions and
014     * limitations under the License.
015     */
016    
017    /* $Id: Graphics2DImagePainterMathML.java,v 371548310efa 2010/08/09 21:15:33 max $ */
018    
019    package net.sourceforge.jeuclid.xmlgraphics;
020    
021    import java.awt.Dimension;
022    import java.awt.Graphics2D;
023    import java.awt.geom.Rectangle2D;
024    
025    import net.sourceforge.jeuclid.MutableLayoutContext;
026    import net.sourceforge.jeuclid.context.LayoutContextImpl;
027    import net.sourceforge.jeuclid.layout.JEuclidView;
028    
029    import org.apache.xmlgraphics.java2d.Graphics2DImagePainter;
030    import org.w3c.dom.Document;
031    
032    /**
033     * Actually draw an JEuclidView.
034     * 
035     * @version $Revision: 371548310efa $
036     */
037    public class Graphics2DImagePainterMathML implements Graphics2DImagePainter {
038    
039        private final Dimension dimension;
040    
041        private final JEuclidView view;
042    
043        private final float ascent;
044    
045        /**
046         * Default Constructor.
047         * 
048         * @param theView
049         *            {@link JEuclidView} to paint.
050         * @param dim
051         *            Dimension of the view.
052         * @param asc
053         *            Ascent of the view.
054         */
055        public Graphics2DImagePainterMathML(final JEuclidView theView,
056                final Dimension dim, final float asc) {
057            this.view = theView;
058            this.dimension = dim;
059            this.ascent = asc;
060        }
061    
062        /**
063         * Create a new {@link Graphics2DImagePainter} for the given Document.
064         * 
065         * @param document
066         *            A MathML DOM Document.
067         * @return a {@link Graphics2DImagePainter}.
068         */
069        public static Graphics2DImagePainter createGraphics2DImagePainter(
070                final Document document) {
071            final MutableLayoutContext layoutContext = new LayoutContextImpl(
072                    LayoutContextImpl.getDefaultLayoutContext());
073    
074            final JEuclidView view = new JEuclidView(document, layoutContext,
075                    null);
076            final int w = (int) Math.ceil(view.getWidth()
077                    * PreloaderMathML.MPT_FACTOR);
078            final float ascent = view.getAscentHeight();
079            final int h = (int) Math.ceil((ascent + view.getDescentHeight())
080                    * PreloaderMathML.MPT_FACTOR);
081            return new Graphics2DImagePainterMathML(view, new Dimension(w, h),
082                    ascent);
083        }
084    
085        /** {@inheritDoc} */
086        public Dimension getImageSize() {
087            return this.dimension;
088        }
089    
090        /** {@inheritDoc} */
091        public void paint(final Graphics2D graphics2d,
092                final Rectangle2D rectangle2d) {
093            this.view.draw(graphics2d, 0, this.ascent);
094        }
095    }