/*  $Id: escapeChars.java,v 1.1 2001/04/30 20:51:54 agarcia3 Exp $ 
    webEditor. The new way in content management
    Copyright (C) 2001  Alfredo Garcia

    This program 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.

    This program 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 General Public License for more details.
*/

package webEditor.util;

import java.io.*;

import org.w3c.dom.*;
import org.apache.xerces.dom.*;
import org.apache.regexp.RE;

/**
 * Special characters escaping utilities.
 *
 * @author <a href="mailto:agarcia@mundofree.com">Alfredo Garcia
 */
public class escapeChars 
{
   
   /**
    * Add the scaping character (slash) to the input string
    * @param in	Input String
    * @return String
    */
   public String addSlashes (String in) 
   {
	String out = null;
try {
	RE r = new RE("'");	
	out = r.subst (in, "\\'");

} catch (Exception e) {
	e.printStackTrace();
}
	return (out);
   }

   /**
    * Remove the scaping character (slash) to the input string
    * @param in	Input String
    * @return String
    */
   public String removeSlashes (String in) 
   {
	String out = null;
try {
	RE r = new RE("\\'");	
	out = r.subst (in, "'");

} catch (Exception e) {
	e.printStackTrace();
}
	return (out);
   }

   /**
    * Escape special characters into the DOM tree
    * @param doc		DOM tree of the document
    * @return Document		New DOM tree
    */
   public Document escapeDoc (Document doc) 
   {
   	String rootTag = null;
   	String tagName = null;
   	String tagValue = null;

   	Element root = doc.getDocumentElement();
	rootTag = root.getTagName();
	NodeList list = doc.getElementsByTagName(rootTag).item(0).getChildNodes();

	// Now, we escape the text value of all the nodes's tree
	for (int i=0; i < list.getLength(); i++) {
		Node source = list.item(i);

		tagValue = source.getLastChild().getNodeValue();
		source.getLastChild().setNodeValue (this.addSlashes(tagValue));
	}

   	return (doc);
   }


   
}