package net.sf.latexdraw.parsers.svg;
import java.text.ParseException;
import net.sf.latexdraw.parsers.svg.parsers.SVGPathParser;
import net.sf.latexdraw.parsers.svg.path.SVGPathSegClosePath;
import net.sf.latexdraw.parsers.svg.path.SVGPathSegLineto;
import net.sf.latexdraw.parsers.svg.path.SVGPathSegList;
import net.sf.latexdraw.parsers.svg.path.SVGPathSegMoveto;
import org.w3c.dom.Node;
/**
* Defines the SVG tag <code>path</code>.<br>
*<br>
* This file is part of LaTeXDraw.<br>
* Copyright (c) 2005-2014 Arnaud BLOUIN<br>
*<br>
* 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.<br>
*<br>
* 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.<br>
*<br>
* 10/06/07<br>
* @author Arnaud BLOUIN
* @version 3.0
* @since 0.1
*/
public class SVGPathElement extends SVGElement {
/**
* See {@link SVGElement#SVGElement(Node, SVGElement)}.
* @throws MalformedSVGDocument If the element is not well formed.
*/
public SVGPathElement(final Node n, final SVGElement p) throws MalformedSVGDocument {
super(n, p);
}
/**
* Creates an empty SVG path element.
* @param owner The owner document.
* @since 0.1
*/
public SVGPathElement(final SVGDocument owner) {
super(owner);
setAttribute(SVGAttributes.SVG_D, "");//$NON-NLS-1$
setNodeName(SVGElements.SVG_PATH);
}
/**
* @return True if the path is a unique line.
* @since 0.1
*/
public boolean isLine() {
final SVGPathSegList segList = getSegList();
return segList.size()==2 && segList.get(0) instanceof SVGPathSegMoveto &&
segList.get(1) instanceof SVGPathSegLineto ;
}
/**
* @return True if the path is composed of lines and has a 'close path' segment at the end.
* @since 0.1
*/
public boolean isLines() {
final SVGPathSegList segList = getSegList();
if(segList.size()<3 || !(segList.get(0) instanceof SVGPathSegMoveto))
return false;
boolean ok = true;
int i;
final int size;
for(i=1, size=segList.size()-1; i<size && ok; i++)
if(!(segList.get(i) instanceof SVGPathSegLineto))
ok = false;
return ok;
}
/**
* @return True if the path is composed of lines and has a 'close path' segment at the end.
* @since 0.1
*/
public boolean isPolygon() {
final SVGPathSegList segList = getSegList();
if(segList.isEmpty() || !(segList.get(0) instanceof SVGPathSegMoveto))
return false;
boolean ok = true;
int i;
final int size;
for(i=1, size=segList.size()-1; i<size && ok; i++)
if(!(segList.get(i) instanceof SVGPathSegLineto))
ok = false;
if(!(segList.get(segList.size()-1) instanceof SVGPathSegClosePath))
ok = false;
return ok;
}
/**
* The definition of the outline of a shape.
* @return The path data (in postscript) from the segList attribute.
* @since 0.1
*/
public String getPathData() {
return getAttribute(getUsablePrefix()+SVGAttributes.SVG_D);
}
@Override
public boolean checkAttributes() {
return getPathData()!=null;
}
@Override
public boolean enableRendering() {
return !getPathData().isEmpty();
}
/**
* @return the segList.
* @since 0.1
*/
public SVGPathSegList getSegList() {
final String path = getPathData();
final SVGPathSegList segList = new SVGPathSegList();
final SVGPathParser pp = new SVGPathParser(path, segList);
try{ pp.parse(); }
catch(final ParseException e) { throw new IllegalArgumentException(e + " But : \"" + path + "\" found."); } //$NON-NLS-1$ //$NON-NLS-2$
return segList;
}
/**
* Sets the path data.
* @param path The path to set.
* @since 2.0.0
*/
public void setPathData(final SVGPathSegList path) {
if(path!=null)
setAttribute(SVGAttributes.SVG_D, path.toString());
}
}