AtomMath.java

/* ========================================================================
 * PlantUML : a free UML diagram generator
 * ========================================================================
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 * (C) Copyright 2009-2024, Arnaud Roques
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package net.sourceforge.plantuml.klimt.creole.atom;

import net.sourceforge.plantuml.klimt.color.HColor;
import net.sourceforge.plantuml.klimt.color.HColorSimple;
import net.sourceforge.plantuml.klimt.color.HColors;
import net.sourceforge.plantuml.klimt.drawing.UGraphic;
import net.sourceforge.plantuml.klimt.font.StringBounder;
import net.sourceforge.plantuml.klimt.geom.XDimension2D;
import net.sourceforge.plantuml.klimt.shape.UImage;
import net.sourceforge.plantuml.math.MathBlankImage;
import net.sourceforge.plantuml.math.ScientificEquationSafe;
import net.sourceforge.plantuml.teavm.TeaVM;

public class AtomMath extends AbstractAtom implements Atom {

	private final ScientificEquationSafe math;
	private final HColor foreground;
	private final HColor background;

	public AtomMath(ScientificEquationSafe math, HColor foreground, HColor background) {
		this.math = math;
		this.foreground = foreground;
		this.background = background;
	}

	@Override
	public XDimension2D calculateDimensionSlow(StringBounder stringBounder) {
		if (stringBounder.matchesProperty("TIKZ")) {
			return stringBounder.calculateDimension(null, math.getSource());
		}
		return math.getDimension(stringBounder);
	}

	public double getStartingAltitude(StringBounder stringBounder) {
		return 0;
	}

	@Override
	public void drawU(UGraphic ug) {
		// (TikZ is on the JVM only: the marker lets TeaVM prune this branch, and the AWT-based image)
		if (TeaVM.isTeaVM() == false && ug.matchesProperty("TIKZ")) {
			// TikZ gets the source of the formula, not a drawing
			final XDimension2D dim = math.getDimension(ug.getStringBounder());
			ug.draw(new UImage(new MathBlankImage(dim)).withFormula(math.getSource()));
			return;
		}
		// Only a plain color can be used; the UGraphic maps it as it does for any shape
		final HColor fore = foreground instanceof HColorSimple ? foreground : HColors.BLACK;
		final HColor back;
		if (background == null)
			back = null;
		else
			back = background instanceof HColorSimple ? background : HColors.WHITE;

		math.drawU(ug, fore, back);
	}

}