IShapeSVGFactory.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 net.sf.latexdraw.badaboom.BadaboomCollector;
import net.sf.latexdraw.models.interfaces.shape.IShape;
import net.sf.latexdraw.parsers.svg.SVGCircleElement;
import net.sf.latexdraw.parsers.svg.SVGElement;
import net.sf.latexdraw.parsers.svg.SVGEllipseElement;
import net.sf.latexdraw.parsers.svg.SVGGElement;
import net.sf.latexdraw.parsers.svg.SVGImageElement;
import net.sf.latexdraw.parsers.svg.SVGLineElement;
import net.sf.latexdraw.parsers.svg.SVGPathElement;
import net.sf.latexdraw.parsers.svg.SVGPolyLineElement;
import net.sf.latexdraw.parsers.svg.SVGPolygonElement;
import net.sf.latexdraw.parsers.svg.SVGRectElement;
import net.sf.latexdraw.parsers.svg.SVGTextElement;
import net.sf.latexdraw.util.LNamespace;

/**
 * Creates IShape instances according to the given SVG element.
 * @author Arnaud BLOUIN
 */
public final class IShapeSVGFactory {
	/** The singleton. */
	public static final IShapeSVGFactory INSTANCE = new IShapeSVGFactory();


	private IShapeSVGFactory() {
		super();
	}


	/**
	 * Creates a IShape instance using the given SVGElement.
	 * @param elt The SVGElement to parse.
	 * @return The created IShape instance or null.
	 * @since 3.0
	 */
	public IShape createShape(final SVGElement elt) {
		return createShape(elt, true);
	}


	/**
	 * Creates a IShape instance using the given SVGElement.
	 * @param elt The SVGElement to parse.
	 * @param withTransformations True: the set of transformations that concerned the given SVG element will be applied to the shape.
	 * @return The created IShape instance or null.
	 * @since 3.0
	 */
	public IShape createShape(final SVGElement elt, final boolean withTransformations) {
		if(elt==null || !elt.enableRendering())
			return null;

		try {
			if(elt instanceof SVGRectElement)
				return new LRectangleSVGGenerator((SVGRectElement)elt).getShape();
			else if(elt instanceof SVGEllipseElement)
				return new LEllipseSVGGenerator((SVGEllipseElement)elt).getShape();
			else if(elt instanceof SVGCircleElement)
				return new LCircleSVGGenerator((SVGCircleElement)elt).getShape();
			else if(elt instanceof SVGPolygonElement)
				return new LPolygonSVGGenerator((SVGPolygonElement)elt).getShape();
			else if(elt instanceof SVGPolyLineElement)
				return new LPolylinesSVGGenerator((SVGPolyLineElement)elt).getShape();
			else if(elt instanceof SVGImageElement)
				return new LPictureSVGGenerator((SVGImageElement)elt).getShape();
			else if(elt instanceof SVGLineElement)
				return new LPolylinesSVGGenerator((SVGLineElement)elt).getShape();
			else if(elt instanceof SVGTextElement)
				return new LTextSVGGenerator((SVGTextElement)elt).getShape();
			else if(elt instanceof SVGPathElement) {
				final SVGPathElement p = (SVGPathElement)elt;

				if(p.isPolygon())
					return new LPolygonSVGGenerator((SVGPathElement)elt).getShape();

				if(p.isLines() || p.isLine())
					return new LPolylinesSVGGenerator((SVGPathElement)elt).getShape();

				if(p.isBezierCurve()) {
					return new LBezierCurveSVGGenerator((SVGPathElement)elt).getShape();
				}
			}
			else
				if(elt instanceof SVGGElement) {// If we have a group of shapes or a latexdraw shape.
					final String ltdPref 	= elt.lookupPrefixUsable(LNamespace.LATEXDRAW_NAMESPACE_URI);
					final String type 	= elt.getAttribute(ltdPref+LNamespace.XML_TYPE);

					// If we have a group of shapes.
					if(type==null || type.isEmpty() || LNamespace.XML_TYPE_GROUP.equals(type)) {
						switch(elt.getChildNodes().getLength()) {
							case 0:
								return null;
							case 1:
								return createShape((SVGElement)elt.getChildNodes().item(0));
							default:
								return new LGroupSVGGenerator((SVGGElement)elt, withTransformations).getShape();
						}
					}

					// Otherwise, it should be a latexdraw shape saved in an SVG document.
                    switch(type) {
                    	case LPlotSVGGenerator.XML_TYPE_PLOT: return new LPlotSVGGenerator((SVGGElement) elt, withTransformations).getShape();
                        case LNamespace.XML_TYPE_RECT: return new LRectangleSVGGenerator((SVGGElement) elt, withTransformations).getShape();
                        case LNamespace.XML_TYPE_ELLIPSE: return new LEllipseSVGGenerator((SVGGElement) elt, withTransformations).getShape();
                        case LNamespace.XML_TYPE_CIRCLE: return new LCircleSVGGenerator((SVGGElement) elt, withTransformations).getShape();
                        case LNamespace.XML_TYPE_POLYGON: return new LPolygonSVGGenerator((SVGGElement) elt, withTransformations).getShape();
                        case LNamespace.XML_TYPE_SQUARE: return new LSquareSVGGenerator((SVGGElement) elt, withTransformations).getShape();
                        case LNamespace.XML_TYPE_TRIANGLE: return new LTriangleSVGGenerator((SVGGElement) elt, withTransformations).getShape();
                        case LNamespace.XML_TYPE_RHOMBUS: return new LRhombusSVGGenerator((SVGGElement) elt, withTransformations).getShape();
                        case LNamespace.XML_TYPE_JOINED_LINES: return new LPolylinesSVGGenerator((SVGGElement) elt, withTransformations).getShape();
                        case LNamespace.XML_TYPE_FREEHAND: return new LFreeHandSVGGenerator((SVGGElement) elt, withTransformations).getShape();
                        case LNamespace.XML_TYPE_LINE: return new LPolylinesSVGGenerator((SVGGElement) elt, withTransformations).getShape();
                        case LNamespace.XML_TYPE_BEZIER_CURVE: return new LBezierCurveSVGGenerator((SVGGElement) elt, withTransformations).getShape();
                        case LNamespace.XML_TYPE_GRID: return new LGridSVGGenerator((SVGGElement) elt, withTransformations).getShape();
                        case LNamespace.XML_TYPE_AXE: return new LAxeSVGGenerator((SVGGElement) elt, withTransformations).getShape();
                        case LNamespace.XML_TYPE_TEXT: return new LTextSVGGenerator((SVGGElement) elt, withTransformations).getShape();
                        case LNamespace.XML_TYPE_GROUP: return new LGroupSVGGenerator((SVGGElement) elt, withTransformations).getShape();
                        case LNamespace.XML_TYPE_DOT: return new LDotSVGGenerator((SVGGElement) elt, withTransformations).getShape();
                        case LNamespace.XML_TYPE_ARC: return new LCircleArcSVGGenerator((SVGGElement) elt, withTransformations).getShape();
                        case LNamespace.XML_TYPE_PICTURE: return new LPictureSVGGenerator((SVGGElement) elt, withTransformations).getShape();
                    }
				}
		}
		catch(final Exception ex) { BadaboomCollector.INSTANCE.add(ex); }

		return null;
	}
}