/**********************************************
    * Copyright (C) 2011 Lukas Laag
    * This file is part of lib-gwt-svg.
    * 
    * libgwtsvg is free software: you can redistribute it and/or modify
    * it under the terms of the GNU Lesser General Public License as published by
    * the Free Software Foundation, either version 3 of the License, or
    * (at your option) any later version.
    * 
   * libgwtsvg is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   * GNU Lesser General Public License for more details.
   * 
   * You should have received a copy of the GNU Lesser General Public License
   * along with libgwtsvg.  If not, see http://www.gnu.org/licenses/
   **********************************************/
  package org.vectomatic.dom.svg.impl;
  
  import org.vectomatic.dom.svg.utils.DOMHelper;
  import org.vectomatic.dom.svg.utils.ParserException;
  import org.vectomatic.dom.svg.utils.XPathPrefixResolver;
  
  import com.google.gwt.dom.client.Element;
  import com.google.gwt.dom.client.Text;
  
  /**
   * Internal class to wrap DOM parser implementations for webkit based browsers
   * @author laaglu
   */
  public class SVGParserImplWebkit extends SVGParserImpl {
  	/**
  	 * Parses the supplied SVG text into a document
  	 * @param rawSvg
  	 * raw xml to be parsed
  	 * @param enableScripts
  	 * true to enable embedded scripts, false otherwise
  	 * @return
  	 * the document resulting from the parse
  	 */
  	@Override
  	public final SVGSVGElement parse(String rawSvg, boolean enableScripts) throws ParserException {
  		if (isIE()) {
  			return parseIE(rawSvg, enableScripts);
  		}
  		SVGDocument doc = parseFromString(rawSvg, "text/xml").cast();
  		Element elt = doc.getDocumentElement();
  		if ("parsererror".equals(DOMHelper.getLocalName(elt))) {
  			String message = "Parsing error";
  			if (elt.getFirstChild() != null) {
  				message = elt.getFirstChild().<Text>cast().getData();
  			}
  			throw new ParserException(ParserException.Type.NotWellFormed, message);
  		} else if ("html".equals(DOMHelper.getLocalName(elt))) {
  			String message = DOMHelper.evaluateStringXPath(elt, "./x:body/x:parsererror/x:div/text()", new XPathPrefixResolver() {
  				@Override
  				public String resolvePrefix(String prefix) {
  					if ("x".equals(prefix)) {
  						return "http://www.w3.org/1999/xhtml";
  					}
  					return null;
  				}
  			});
  			throw new ParserException(ParserException.Type.NotWellFormed, message);
  		}
  		// Import + clone seem to be required for embedded QTWebkit (though they are not needed
  		// for Chromium but there is no simple way to distinguish both)
  		SVGSVGElement svg = DOMHelper.importNode(DOMHelper.getCurrentDocument(), elt, true).cast();
      	svg = svg.cloneNode(true).<SVGSVGElement>cast();
  		return enableScripts ? enableScriptElements(svg) : svg;
  	}
  
  }