TeXIconBuilder.java

/* ========================================================================
 * PlantUML : a free UML diagram generator
 * ========================================================================
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 * (C) Copyright 2009-2024, Arnaud Roques
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 * Project Info:  https://plantuml.com
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package net.sourceforge.plantuml.math;

import net.sourceforge.plantuml.klimt.color.HColor;
import net.sourceforge.plantuml.klimt.drawing.UGraphic;
import net.sourceforge.plantuml.klimt.font.StringBounder;
import net.sourceforge.plantuml.klimt.geom.XDimension2D;
// ::comment when __MIT__ __EPL__ __BSD__ __ASL__ __LGPL__
import org.scilab.forge.jlatexmath.TeXConstants;
import org.scilab.forge.jlatexmath.TeXFormula;
import org.scilab.forge.jlatexmath.TeXIcon;
import org.scilab.forge.jlatexmath.TeXInsets;
// ::done

public class TeXIconBuilder {

	private MathDrawing drawing;

	public TeXIconBuilder(String tex, StringBounder stringBounder) throws ClassNotFoundException {
		// ::comment when __MIT__ __EPL__ __BSD__ __ASL__ __LGPL__
		MathResources.ensure();
		final TeXFormula formula = new TeXFormula(tex);
		final TeXIcon teXIcon = formula.new TeXIconBuilder().setStyle(TeXConstants.STYLE_DISPLAY).setSize(20)
				.setTextMeasurer(new StringBounderTextMeasurer(stringBounder)).build();

		final int margin = 1;
		teXIcon.setInsets(new TeXInsets(margin, margin, margin, margin));
		final XDimension2D dimension = new XDimension2D(teXIcon.getIconWidth(), teXIcon.getIconHeight());
		drawing = new MathDrawing() {

			public XDimension2D getDimension() {
				return dimension;
			}

			public void draw(UGraphic ug, HColor foreground) {
				final UGraphicTeXGraphics canvas = new UGraphicTeXGraphics(ug, foreground);
				teXIcon.paint(canvas, null, 0, 0);
				canvas.flush();
			}
		};
		// ::done
		// ::uncomment when __MIT__ __EPL__ __BSD__ __ASL__ __LGPL__
//		// JLaTeXMath is GPL: this license variant does not contain it
//		throw new ClassNotFoundException("org.scilab.forge.jlatexmath.TeXFormula");
		// ::done
	}

	public MathDrawing getDrawing() {
		return drawing;
	}

}