/*
 * 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
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 * CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY, ARISING OUT OF
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 *
 * You acknowledge that Software is not designed, licensed or
 * intended for use in the design, construction, operation or
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 */

import com.sun.tools.doclets.Taglet;
import com.sun.javadoc.*;
import java.util.Map;
import java.io.*;
/**
 * A sample Taglet representing @example. 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, "@example Hello" 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 ExampleTaglet implements Taglet {
    
    private static final String NAME = "example";
    private static final String HEADER = "example To Do:";

    /**
     * Return the name of this custom tag.
     */
    public String getName() {
        return NAME;
    }
    
    /**
     * Will return true since <code>@example</code>
     * can be used in field documentation.
     * @return true since <code>@example</code>
     * can be used in field documentation and false
     * otherwise.
     */
    public boolean inField() {
        return true;
    }

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

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

    /**
     * Will return true since <code>@example</code>
     * can be used in type documentation (classes or interfaces).
     * @return true since <code>@example</code>
     * can be used in type documentation and false
     * otherwise.
     */
    public boolean inType() {
        return true;
    }
    
    /**
     * Will return false since <code>@example</code>
     * is not an inline tag.
     * @return false since <code>@example</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) {
       ExampleTaglet tag = new ExampleTaglet();
       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 createHTML(readFile(tag.text()));
    }
     
    
    /**
     * 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;
        }
		return createHTML(readFile(tags[0].text()));
    }
    
    
    
    String createHTML(String theString) {
    	if(theString!=null) {
        String dd = "<script type=\"text/javascript\">\n" +
        			"<!--\n"+ 
        			"document.getElementsByTagName('html')[0].className = 'isjs';" +
					"function toggle(dt) { var display, dd=dt; do{ dd = dd.nextSibling } while(dd.tagName!='DD'); toOpen =!dd.style.display;" +
  					"dd.style.display = toOpen? 'block':''; dt.getElementsByTagName('span')[0].innerHTML  = toOpen? '-':'+' ; }\n" +
  					"-->\n</script>";

		return dd+"\n<div id=\"test\" class=\"toggleList\">" +
		"<dl><dt onclick=\"toggle(this);\"><span>+</span>Example</dt>" +
		"<dd><code><pre>"+theString+"</pre></code>" +
		"</dd></dl></div>";
		} 
    	return "";
    }
    
    
    /**
     * check if the examples directory exists and return the example as given in the tag.
     * @param theExample the name of the example
     */
     String readFile(String theExample) { 
		String record = "";
		String myResult = "";
		int recCount = 0;
		String myDir = "../examples/";
		File file=new File(myDir);
		if(file.exists()==false) {
			myDir = "./examples/";
		}
        String[] s = theExample.split("\\/");
        String myFile = "";
        if(s.length>=1) {
            myFile = s[s.length-1];
            System.out.println("myFile\t"+myFile);
                for(int i=0;i<s.length;i++) {
                    myDir += s[i]+"/";
                }
            System.out.println("myDir\t"+myDir);
        }
        String pde = myDir+myFile+".pde";
        try { 
            
			FileReader fr = new FileReader(pde);
			BufferedReader br = new BufferedReader(fr);
			record = new String();
			while ((record = br.readLine()) != null) {
				myResult += record+"\n";
			} 
            System.out.println("\nExampleTaglet ("+theExample+"), creating example code for "+pde+"\n");
		} catch (IOException e) { 
			System.out.println(e);
            System.out.println("\nExampleTaglet ("+theExample+"), pde not found "+pde+"\n");
			return null;
		}
		return myResult;
     }
}


