LRhombusSVGGenerator.java

/*
 * This file is part of LaTeXDraw.
 * Copyright (c) 2005-2017 Arnaud BLOUIN
 * LaTeXDraw is free software; you can redistribute it and/or modify it under
 * the terms of the GNU General Public License as published by the Free Software
 * Foundation; either version 2 of the License, or (at your option) any later version.
 * LaTeXDraw is distributed without any warranty; without even the implied
 * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * General Public License for more details.
 */
package net.sf.latexdraw.view.svg;

import java.awt.geom.Point2D;
import java.util.List;
import net.sf.latexdraw.models.MathUtils;
import net.sf.latexdraw.models.ShapeFactory;
import net.sf.latexdraw.models.interfaces.shape.IPoint;
import net.sf.latexdraw.models.interfaces.shape.IRhombus;
import net.sf.latexdraw.parsers.svg.SVGAttributes;
import net.sf.latexdraw.parsers.svg.SVGDocument;
import net.sf.latexdraw.parsers.svg.SVGElement;
import net.sf.latexdraw.parsers.svg.SVGGElement;
import net.sf.latexdraw.parsers.svg.SVGPolygonElement;
import net.sf.latexdraw.parsers.svg.parsers.SVGPointsParser;
import net.sf.latexdraw.util.LNamespace;
import net.sf.latexdraw.view.pst.PSTricksConstants;

/**
 * An SVG generator for a polygon.
 * @author Arnaud BLOUIN
 */
class LRhombusSVGGenerator extends LShapeSVGGenerator<IRhombus> {
	/**
	 * Creates a generator of SVG rhombus.
	 * @param rhombus The rhombus used for the generation.
	 * @throws IllegalArgumentException If the given rhombus is null.
	 * @since 2.0
	 */
	protected LRhombusSVGGenerator(final IRhombus rhombus) {
		super(rhombus);
	}

	/**
	 * Creates a rhombus from a latexdraw-SVG element.
	 * @param elt The source element.
	 * @since 2.0.0
	 */
	protected LRhombusSVGGenerator(final SVGGElement elt, final boolean withTransformation) {
		this(ShapeFactory.INST.createRhombus());

		final SVGElement elt2 = getLaTeXDrawElement(elt, null);

		if(elt==null || !(elt2 instanceof SVGPolygonElement))
			throw new IllegalArgumentException();

		final SVGPolygonElement main = (SVGPolygonElement)elt2;
		setSVGLatexdrawParameters(elt);
		setSVGParameters(main);

		final List<Point2D> ptsPol = SVGPointsParser.getPoints(elt.getAttribute(
								 elt.getUsablePrefix(LNamespace.LATEXDRAW_NAMESPACE_URI)+LNamespace.XML_POINTS));

		if(ptsPol==null || ptsPol.size()!=4)
			throw new IllegalArgumentException();

		shape.getPtAt(0).setPoint2D(ptsPol.get(0));
		shape.getPtAt(1).setPoint2D(ptsPol.get(1));
		shape.getPtAt(2).setPoint2D(ptsPol.get(2));
		shape.getPtAt(3).setPoint2D(ptsPol.get(3));

		setSVGShadowParameters(getLaTeXDrawElement(elt, LNamespace.XML_TYPE_SHADOW));
		setSVGDbleBordersParameters(getLaTeXDrawElement(elt, LNamespace.XML_TYPE_DBLE_BORDERS));

		if(withTransformation)
			applyTransformations(elt);
	}



	@Override
	public SVGElement toSVG(final SVGDocument doc) {
		if(doc==null)
			return null;

		final IPoint tl  = shape.getTopLeftPoint();
		final IPoint br  = shape.getBottomRightPoint();
		final IPoint gc = shape.getGravityCentre();
		final IPoint p1 = ShapeFactory.INST.createPoint((tl.getX()+br.getX())/2., tl.getY());
		final IPoint p2 = ShapeFactory.INST.createPoint(br.getX(), (tl.getY()+br.getY())/2.);
		final IPoint p3 = ShapeFactory.INST.createPoint((tl.getX()+br.getX())/2., br.getY());
		final SVGElement root = new SVGGElement(doc);
		SVGElement elt;
	    final double gap = getPositionGap()/2.;
	    final double cornerGap1 = MathUtils.INST.getCornerGap(gc, p1, p2, gap);
	    double cornerGap2 = MathUtils.INST.getCornerGap(gc, p2, p3, gap);

	    if(p2.getX()<p3.getX())
	    	cornerGap2*=-1;

        final String points = String.valueOf(p1.getX()) + ',' + (p1.getY() - cornerGap1) + ' ' + (p2.getX() + cornerGap2) + ',' + p2.getY() + ' ' + p3.getX() + ',' + (p3.getY() + cornerGap1) + ' ' + (tl.getX() - cornerGap2) + ',' + p2.getY();

        root.setAttribute(LNamespace.LATEXDRAW_NAMESPACE+':'+LNamespace.XML_TYPE, LNamespace.XML_TYPE_RHOMBUS);
        root.setAttribute(SVGAttributes.SVG_ID, getSVGID());

        if(shape.hasShadow()) {
        	elt = new SVGPolygonElement(doc);
        	elt.setAttribute(SVGAttributes.SVG_POINTS, points);
        	setSVGShadowAttributes(elt, true);
        	root.appendChild(elt);
        }

        if(shape.hasShadow() && !shape.getLineStyle().getLatexToken().equals(PSTricksConstants.LINE_NONE_STYLE)) {
        	// The background of the borders must be filled is there is a shadow.
    		elt = new SVGPolygonElement(doc);
    		elt.setAttribute(SVGAttributes.SVG_POINTS, points);
    		setSVGBorderBackground(elt, root);
        }

		elt = new SVGPolygonElement(doc);
		elt.setAttribute(SVGAttributes.SVG_POINTS, points);
		root.appendChild(elt);
		root.setAttribute(LNamespace.LATEXDRAW_NAMESPACE+':'+LNamespace.XML_POINTS, String.valueOf(tl.getX()) + ' ' +
                tl.getY() + ' ' + br.getX() + ' ' + tl.getY() + ' ' + tl.getX() + ' ' + br.getY() + ' ' + br.getX() + ' ' + br.getY());

		if(shape.hasDbleBord()) {
			final SVGElement dblBord = new SVGPolygonElement(doc);
			dblBord.setAttribute(SVGAttributes.SVG_POINTS, points);
			setSVGDoubleBordersAttributes(dblBord);
			root.appendChild(dblBord);
		}

		setSVGAttributes(doc, elt, true);
		setSVGRotationAttribute(root);

		return root;
	}
}