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/* $Id$ */
018
019package net.sourceforge.jeuclid.xmlgraphics;
020
021import java.awt.Dimension;
022import java.awt.Graphics2D;
023import java.awt.geom.Rectangle2D;
024
025import net.sourceforge.jeuclid.MutableLayoutContext;
026import net.sourceforge.jeuclid.context.LayoutContextImpl;
027import net.sourceforge.jeuclid.layout.JEuclidView;
028
029import org.apache.xmlgraphics.java2d.Graphics2DImagePainter;
030import org.w3c.dom.Document;
031
032/**
033 * Actually draw an JEuclidView.
034 * 
035 * @version $Revision$
036 */
037public 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}