/* ================================================================

  * Cewolf : Chart enabling Web Objects Framework

  * ================================================================

  *

  * Project Info:  http://cewolf.sourceforge.net

  * Project Lead:  Guido Laures (guido@laures.de);

  *

  * (C) Copyright 2002, by Guido Laures

  *

  * 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 de.laures.cewolf.taglib.html;

 import java.io.IOException;

 import java.io.Serializable;

 import java.io.Writer;

 import javax.servlet.jsp.JspException;

 import javax.servlet.jsp.JspWriter;

 import de.laures.cewolf.taglib.tags.CewolfBodyTag;

 /**

  * Abstract base class which holds attribbutes common for all HTML 4.0 tags.

  * @author  Guido Laures

  */

 public abstract class AbstractHTMLBaseTag extends CewolfBodyTag implements Serializable{

     protected static final int UNDEFINED_INT = -1;

     protected static final float UNDEFINED_FLOAT = -1.0f;

     protected static final String UNDEFINED_STR = null;

     /** Holds value of property ID. */

     protected String id = UNDEFINED_STR;

     /** Holds value of property clazz. */

     protected String clazz = UNDEFINED_STR;

     /** Holds value of property style. */

     protected String style = UNDEFINED_STR;

     /** Holds value of property title. */

     protected String title = UNDEFINED_STR;

     /** Holds value of property lang. */

     protected String lang = UNDEFINED_STR;

     /** Holds value of property dir. */

     protected String dir = UNDEFINED_STR;

     /** Holds value of property onclick. */

     protected String onclick = UNDEFINED_STR;

     /** Holds value of property ondbclick. */

     protected String ondbclick = UNDEFINED_STR;

     /** Holds value of property onmousedown. */

     protected String onmousedown = UNDEFINED_STR;

     /** Holds value of property onmouseup. */

     protected String onmouseup = UNDEFINED_STR;

     /** Holds value of property onmouseover. */

     protected String onmouseover = UNDEFINED_STR;

     /** Holds value of property onmousemove. */

     protected String onmousemove = UNDEFINED_STR;

     /** Holds value of property onmouseout. */

     protected String onmouseout = UNDEFINED_STR;

     /** Holds value of property onkeypress. */

     protected String onkeypress = UNDEFINED_STR;

     /** Holds value of property onkeydown. */

     protected String onkeydown = UNDEFINED_STR;

     /** Holds value of property onkeyup. */

     protected String onkeyup = UNDEFINED_STR;

     public AbstractHTMLBaseTag(){

     	setId(UNDEFINED_STR);

     }

     protected abstract String getTagName();

     protected abstract boolean hasBody();

     protected abstract boolean wellFormed();

     protected void reset(){

         this.clazz = UNDEFINED_STR;

         this.dir = UNDEFINED_STR;

         this.id = UNDEFINED_STR;

         this.lang = UNDEFINED_STR;

         this.onclick = UNDEFINED_STR;

         this.ondbclick = UNDEFINED_STR;

         this.onkeydown = UNDEFINED_STR;

         this.onkeypress = UNDEFINED_STR;

         this.onkeyup = UNDEFINED_STR;

         this.onmousedown = UNDEFINED_STR;

         this.onmousemove = UNDEFINED_STR;

         this.onmouseout = UNDEFINED_STR;

         this.onmouseover = UNDEFINED_STR;

         this.onmouseup = UNDEFINED_STR;

         this.style = UNDEFINED_STR;

         this.title = UNDEFINED_STR;

     }

     public int doStartTag() throws JspException {

         JspWriter writer = pageContext.getOut();

         try {

             writer.write("<" + getTagName());

             writeAttributes(writer);

             if(hasBody()){

                 writer.write(">");

                 return EVAL_PAGE;

             } else {

                 return SKIP_BODY;

             }

         } catch(IOException ioe){

         	super.pageContext.getServletContext().log("",ioe);

             throw new JspException(ioe.getMessage());

         }

     }

     public int doEndTag() throws JspException {

         JspWriter writer = pageContext.getOut();

         try{

             if(hasBody()){

                 writer.write("</" + getTagName() + ">");

             } else {

                 if(wellFormed()){

                     writer.write(" /");

                 }

                 writer.write(">");

             }

             return doAfterEndTag(EVAL_PAGE);

         } catch(IOException ioe){

         	super.pageContext.getServletContext().log("",ioe);

             throw new JspException(ioe.getMessage());

         }

     }

     public void writeAttributes(Writer wr){

         try {

             appendAttributeDeclaration(wr, getId(), "ID");

             appendAttributeDeclaration(wr, this.clazz, "CLASS");

             appendAttributeDeclaration(wr, this.style, "STYLE");

             appendAttributeDeclaration(wr, this.onclick, "ONCLICK");

             appendAttributeDeclaration(wr, this.ondbclick, "ONDBCLICK");

             appendAttributeDeclaration(wr, this.onkeydown, "ONKEYDOWN");

             appendAttributeDeclaration(wr, this.onkeypress, "ONKEYPRESS");

             appendAttributeDeclaration(wr, this.onkeyup, "ONKEYUP");

             appendAttributeDeclaration(wr, this.onmousedown, "ONMOUSEDOWN");

             appendAttributeDeclaration(wr, this.onmousemove, "ONMOUSEMOVE");

             appendAttributeDeclaration(wr, this.onmouseout, "ONMOUSEOUT");

             appendAttributeDeclaration(wr, this.onmouseover, "ONMOUSEOVER");

             appendAttributeDeclaration(wr, this.onmouseup, "ONMOUSEUP");

             appendAttributeDeclaration(wr, this.title, "TITLE");

             appendAttributeDeclaration(wr, this.lang, "LANG");

             appendAttributeDeclaration(wr, this.dir, "DIR");

         } catch(IOException ioex){

             ioex.printStackTrace();

         }

     }

     protected void appendAttributeDeclaration(Writer wr, String attr, String name) throws IOException {

         if(attr != UNDEFINED_STR){

             wr.write(" " + name + "=\"" + attr + "\"");

         }

     }

     protected void appendAttributeDeclaration(Writer wr, int attr, String name) throws IOException {

         // does not call the according method for Strings to avoid additional

         // String instantiation

         if(attr != UNDEFINED_INT){

             wr.write(" " + name + "=\"" + attr + "\"");

         }

     }

     protected void appendAttributeDeclaration(Writer wr, float attr, String name) throws IOException {

         // does not call the according method for Strings to avoid additional

         // String instantiation

         if(attr != UNDEFINED_FLOAT){

             wr.write(" " + name + "=\"" + attr + "\"");

         }

     }

     /** Setter for property clazz.

      * @param clazz New value of property clazz.

      */

     public void setClass(String clazz) {

         this.clazz = clazz;

     }

     /** Setter for property style.

      * @param style New value of property style.

      */

     public void setStyle(String style) {

         this.style = style;

     }

     /** Setter for property title.

      * @param title New value of property title.

      */

     public void setHtmltitle(String title) {

         this.title = title;

     }

     /** Setter for property lang.

      * @param lang New value of property lang.

      */

     public void setLang(String lang) {

         this.lang = lang;

     }

     /** Setter for property dir.

      * @param dir New value of property dir.

      */

     public void setDir(String dir) {

         this.dir = dir;

     }

     /** Setter for property onclick.

      * @param onclick New value of property onclick.

      */

     public void setOnclick(String onclick) {

         this.onclick = onclick;

     }

     /** Setter for property ondbclick.

      * @param ondbclick New value of property ondbclick.

      */

     public void setOndbclick(String ondbclick) {

         this.ondbclick = ondbclick;

     }

     /** Setter for property onmousedown.

      * @param onmousedown New value of property onmousedown.

      */

     public void setOnmousedown(String onmousedown) {

         this.onmousedown = onmousedown;

     }

     /** Setter for property onmouseup.

      * @param onmouseup New value of property onmouseup.

      */

     public void setOnmouseup(String onmouseup) {

         this.onmouseup = onmouseup;

     }

     /** Setter for property onmouseover.

      * @param onmouseover New value of property onmouseover.

      */

     public void setOnmouseover(String onmouseover) {

         this.onmouseover = onmouseover;

     }

     /** Setter for property onmousemove.

      * @param onmousemove New value of property onmousemove.

      */

     public void setOnmousemove(String onmousemove) {

         this.onmousemove = onmousemove;

     }

     /** Setter for property onmouseout.

      * @param onmouseout New value of property onmouseout.

      */

     public void setOnmouseout(String onmouseout) {

         this.onmouseout = onmouseout;

     }

     /** Setter for property onkeypress.

      * @param onkeypress New value of property onkeypress.

      */

     public void setOnkeypress(String onkeypress) {

         this.onkeypress = onkeypress;

     }

     /** Setter for property onkeydown.

      * @param onkeydown New value of property onkeydown.

      */

     public void setOnkeydown(String onkeydown) {

         this.onkeydown = onkeydown;

     }

     /** Setter for property onkeyup.

      * @param onkeyup New value of property onkeyup.

      */

     public void setOnkeyup(String onkeyup) {

         this.onkeyup = onkeyup;

     }

 }