/*
    * $Header: /cvsroot/jdbforms/dbforms/src/org/dbforms/taglib/StyleTag.java,v 1.14 2006/01/13 13:38:51 hkollmann Exp $
    * $Revision: 1.14 $
    * $Date: 2006/01/13 13:38:51 $
    *
    * DbForms - a Rapid Application Development Framework
    * Copyright (C) 2001 Joachim Peer <joepeer@excite.com>
    *
    * This library 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 2.1 of the License, or (at your option) any later version.
   *
   * This library 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 this library; if not, write to the Free Software
   * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
   */
  
  package org.dbforms.taglib;
  
  import java.util.Hashtable;
  import java.util.StringTokenizer;
  
  import javax.servlet.http.HttpServletRequest;
  import javax.servlet.jsp.JspException;
  
  
  
  /***
   * Renders an dbforms style tag
   *
   * @author Joe Peer
   */
  public class StyleTag extends AbstractScriptHandlerTag
     implements javax.servlet.jsp.tagext.TryCatchFinally {
     private Hashtable params;
     private String    paramList;
     private String    part;
  
     // --------------------- properties ------------------------------------------------------------------
     private String template;
  
     //private String templateBegin, templateEnd;
     private String templateBase;
     private String templateBaseDir;
  
     /***
      * DOCUMENT ME!
      *
      * @param pageContext DOCUMENT ME!
      */
     public void setPageContext(final javax.servlet.jsp.PageContext pageContext) {
        super.setPageContext(pageContext);
  
        templateBase = pageContext.getServletContext()
                                  .getInitParameter("templateBase");
  
        if (templateBase == null) {
           templateBase = "templates";
        }
     }
  
  
     /***
      * DOCUMENT ME!
      *
      * @param paramList DOCUMENT ME!
      */
     public void setParamList(String paramList) {
        this.paramList = paramList;
        this.params    = parseParams(paramList);
     }
  
  
     /***
      * DOCUMENT ME!
      *
      * @return DOCUMENT ME!
      */
     public String getParamList() {
        return paramList;
     }
  
  
     /***
      * DOCUMENT ME!
      *
      * @param part DOCUMENT ME!
      */
     public void setPart(String part) {
        this.part = part;
     }
  
  
    /***
     * DOCUMENT ME!
     *
     * @return DOCUMENT ME!
     */
    public String getPart() {
       return part;
    }
 
 
    /***
     * DOCUMENT ME!
     *
     * @param template DOCUMENT ME!
     */
    public void setTemplate(String template) {
       this.template        = template;
       this.templateBaseDir = templateBase + "/" + template + "/";
 
       //this.templateBegin = templateBaseDir + template + "_begin.jsp";
       //this.templateEnd =  templateBaseDir + template + "_end.jsp";
    }
 
 
    /***
     * DOCUMENT ME!
     *
     * @return DOCUMENT ME!
     */
    public String getTemplate() {
       return template;
    }
 
 
    /***
     * DOCUMENT ME!
     *
     * @return DOCUMENT ME!
     *
     * @throws JspException DOCUMENT ME!
     */
    public int doAfterBody() throws JspException {
       return SKIP_BODY; // gets only rendered 1 time
    }
 
 
    /***
     * DOCUMENT ME!
     *
     * @return DOCUMENT ME!
     *
     * @throws JspException DOCUMENT ME!
     */
    public int doEndTag() throws JspException {
       try {
          if (bodyContent != null) {
             bodyContent.writeOut(bodyContent.getEnclosingWriter());
          }
 
          HttpServletRequest request = (HttpServletRequest) pageContext
                                       .getRequest();
 
          if (params != null) {
             request.setAttribute("styleparams", params);
          }
 
          request.setAttribute("baseDir", templateBaseDir);
 
          pageContext.include(templateBaseDir + template + "_" + part + ".jsp");
       } catch (Exception ioe) {
          throw new JspException("Problem 2 including template end - "
                                 + ioe.toString());
       }
 
       return EVAL_PAGE;
    }
 
 
    /***
     * DOCUMENT ME!
     */
    public void doFinally() {
       params          = null;
       templateBase    = null;
       templateBaseDir = null;
       template        = null;
       paramList       = null;
       part            = null;
    }
 
 
    /***
 
                               */
    public int doStartTag() throws JspException {
       /*
                       try {
                               if(params!=null) pageContext.getRequest().setAttribute("styleparams", params);
                               pageContext.getRequest().setAttribute("baseDir", templateBaseDir);
 
 
                 //pageContext.forward(templateBegin);
 
                 HttpServletRequest request = (HttpServletRequest) pageContext.getRequest();
                 HttpServletResponse response = (HttpServletResponse) pageContext.getResponse();
 
                 request.getRequestDispatcher(templateBegin).include(request, response);
 
                 //pageContext.getOut().flush();
                       } catch(IOException ioe) {
                               throw new JspException("Problem 1including template begin - "+ioe.toString());
                       } catch(ServletException se) {}
       */
       return EVAL_BODY_BUFFERED;
    }
 
 
    /***
     * this method splits a string of the form "param1 = 'foo1', param2 = foo2,
     * param3=foo3" into a hashtable containing following key/value pairs: {
     * ("param1"/"foo1"), ("param2"/"foo2"), ("param3"/"foo3") } #fixme:
     * primitive algorithm! breaks if params contains komma - signs. fix it
     *
     * @param s DOCUMENT ME!
     *
     * @return DOCUMENT ME!
     */
    private Hashtable parseParams(String s) {
       Hashtable result = new Hashtable();
 
       // break into main (key/value)- tokens
       StringTokenizer st = new StringTokenizer(s, ",");
 
       while (st.hasMoreTokens()) {
          String token = st.nextToken(); // a key-value pair in its orignal string-shape
 
          int    equalSignIndex = token.indexOf('=');
 
          // peeling out the key
          String key = token.substring(0, equalSignIndex)
                            .trim();
 
          // peeling out the value (which may or not be embedded in single quotes)
          String value = token.substring(equalSignIndex + 1)
                              .trim();
 
          if ((value.charAt(0) == '\'')
                    && (value.charAt(value.length() - 1) == '\'')) // get out of any single quotes
           {
             value = value.substring(1, value.length() - 1);
          }
 
          result.put(key, value);
       }
 
       return result;
    }
 }