/**********************************************
    * 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 java.util.ArrayList;
  import java.util.Iterator;
  import java.util.List;
  
  import org.vectomatic.dom.svg.utils.DOMHelper;
  import org.vectomatic.dom.svg.utils.ParserException;
  import org.vectomatic.dom.svg.utils.SVGPrefixResolver;
  
  import com.google.gwt.core.client.JavaScriptException;
  import com.google.gwt.dom.client.Element;
  import com.google.gwt.dom.client.Text;
  
  /**
   * Internal class to wrap DOM parser implementations for IE based browsers
   * @author laaglu
   */
  public class SVGParserImplIE extends SVGParserImpl {
  	/**
  	 * Parses the supplied SVG text into a document
  	 * @param rawSvg
  	 * raw xml to be parsed
  	 * @return
  	 * the document resulting from the parse
  	 */
  	public final SVGSVGElement parse(String rawSvg) throws ParserException {
  		SVGDocument doc = null;
  		try {
  			doc = parseFromString(rawSvg, "text/xml").cast();
  			
  		} catch(JavaScriptException e) {
  			throw new ParserException(ParserException.Type.NotWellFormed, e.getMessage());
  		}
  		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);
  		}
  		SVGSVGElement svg = DOMHelper.importNode(DOMHelper.getCurrentDocument(), elt, true).cast();
  		// IE9 bug workaround: update all SVG style elements by
  		// adding a trailing whitespace char, otherwise IE9 will
  		// ignore them
  		Iterator<Text> iterator = DOMHelper.evaluateNodeListXPath(svg, ".//svg:style/text()", SVGPrefixResolver.INSTANCE);
  		List<Text> styleTexts = new ArrayList<Text>();
  		while(iterator.hasNext()) {
  			Text styleText = iterator.next();
  			styleTexts.add(styleText);
  		}
  		for (Text styleText : styleTexts) {
  			styleText.<Text>cast().setData(styleText.<Text>cast().getData() + " ");
  		}
  		
      	return svg;
  	}
  
  }