/*
 * Copyright 2002 Sun Microsystems, Inc. All  Rights Reserved.
 *
 * Redistribution and use in source and binary forms, with or
 * without modification, are permitted provided that the following
 * conditions are met:
 *
 * -Redistributions of source code must retain the above copyright
 *  notice, this list of conditions and the following disclaimer.
 *
 * -Redistribution in binary form must reproduce the above copyright
 *  notice, this list of conditions and the following disclaimer in
 *  the documentation and/or other materials provided with the
 *  distribution.
 *
 * Neither the name of Sun Microsystems, Inc. or the names of
 * contributors may be used to endorse or promote products derived
 * from this software without specific prior written permission.
 *
 * This software is provided "AS IS," without a warranty of any
 * kind. ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND
 * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY
 * EXCLUDED. SUN AND ITS LICENSORS SHALL NOT BE LIABLE FOR ANY
 * DAMAGES OR LIABILITIES  SUFFERED BY LICENSEE AS A RESULT OF OR
 * RELATING TO USE, MODIFICATION OR DISTRIBUTION OF THE SOFTWARE OR
 * ITS DERIVATIVES. IN NO EVENT WILL SUN OR ITS LICENSORS BE LIABLE
 * FOR ANY LOST REVENUE, PROFIT OR DATA, OR FOR DIRECT, INDIRECT,
 * SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE DAMAGES, HOWEVER
 * CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY, ARISING OUT OF
 * THE USE OF OR INABILITY TO USE SOFTWARE, EVEN IF SUN HAS BEEN
 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
 *
 * You acknowledge that Software is not designed, licensed or
 * intended for use in the design, construction, operation or
 * maintenance of any nuclear facility.
 */

import com.sun.tools.doclets.Taglet;
import com.sun.javadoc.*;
import java.util.Map;

/**
 * A sample Taglet representing @todo. This tag can be used in any kind of
 * {@link com.sun.javadoc.Doc}.  It is not an inline tag. The text is displayed
 * in yellow to remind the developer to perform a task.  For
 * example, "@todo Fix this!" would be shown as:
 * <DL>
 * <DT>
 * <B>To Do:</B>
 * <DD><table cellpadding=2 cellspacing=0><tr><td bgcolor="yellow">Fix this!
 * </td></tr></table></DD>
 * </DL>
 *
 * @author Jamie Ho
 * @since 1.4
 */

public class ToDoTaglet implements Taglet {
    
    private static final String NAME = "todo";
    private static final String HEADER = "To Do:";
    
    /**
     * Return the name of this custom tag.
     */
    public String getName() {
        return NAME;
    }
    
    /**
     * Will return true since <code>@todo</code>
     * can be used in field documentation.
     * @return true since <code>@todo</code>
     * can be used in field documentation and false
     * otherwise.
     */
    public boolean inField() {
        return true;
    }

    /**
     * Will return true since <code>@todo</code>
     * can be used in constructor documentation.
     * @return true since <code>@todo</code>
     * can be used in constructor documentation and false
     * otherwise.
     */
    public boolean inConstructor() {
        return true;
    }
    
    /**
     * Will return true since <code>@todo</code>
     * can be used in method documentation.
     * @return true since <code>@todo</code>
     * can be used in method documentation and false
     * otherwise.
     */
    public boolean inMethod() {
        return true;
    }
    
    /**
     * Will return true since <code>@todo</code>
     * can be used in method documentation.
     * @return true since <code>@todo</code>
     * can be used in overview documentation and false
     * otherwise.
     */
    public boolean inOverview() {
        return true;
    }

    /**
     * Will return true since <code>@todo</code>
     * can be used in package documentation.
     * @return true since <code>@todo</code>
     * can be used in package documentation and false
     * otherwise.
     */
    public boolean inPackage() {
        return true;
    }

    /**
     * Will return true since <code>@todo</code>
     * can be used in type documentation (classes or interfaces).
     * @return true since <code>@todo</code>
     * can be used in type documentation and false
     * otherwise.
     */
    public boolean inType() {
        return true;
    }
    
    /**
     * Will return false since <code>@todo</code>
     * is not an inline tag.
     * @return false since <code>@todo</code>
     * is not an inline tag.
     */
    
    public boolean isInlineTag() {
        return false;
    }
    
    /**
     * Register this Taglet.
     * @param tagletMap  the map to register this tag to.
     */
    public static void register(Map tagletMap) {
       ToDoTaglet tag = new ToDoTaglet();
       Taglet t = (Taglet) tagletMap.get(tag.getName());
       if (t != null) {
           tagletMap.remove(tag.getName());
       }
       tagletMap.put(tag.getName(), tag);
    }

    /**
     * Given the <code>Tag</code> representation of this custom
     * tag, return its string representation.
     * @param tag   the <code>Tag</code> representation of this custom tag.
     */
    public String toString(Tag tag) {
        return "<DT><B>" + HEADER + "</B><DD>"
               + "<table cellpadding=2 cellspacing=0><tr><td bgcolor=\"yellow\">"
               + tag.text()
               + "</td></tr></table></DD>\n";
    }
    
    /**
     * Given an array of <code>Tag</code>s representing this custom
     * tag, return its string representation.
     * @param tags  the array of <code>Tag</code>s representing of this custom tag.
     */
    public String toString(Tag[] tags) {
        if (tags.length == 0) {
            return null;
        }
        String result = "\n<DT><B>" + HEADER + "</B><DD>";
        result += "<table cellpadding=2 cellspacing=0><tr><td bgcolor=\"yellow\">";
        for (int i = 0; i < tags.length; i++) {
            if (i > 0) {
                result += ", ";
            }
            result += tags[i].text();
        }
        return result + "</td></tr></table></DD>\n";
    }
}