applet.java

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// ========================================================================
// $Id: Applet.java,v 1.7 2004/07/19 13:12:58 hlavac Exp $
// Copyright 1996-2004 Mort Bay Consulting Pty. Ltd.
// ------------------------------------------------------------------------
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at 
// http://www.apache.org/licenses/LICENSE-2.0
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// ========================================================================

package org.mortbay.html;

import java.io.IOException;
import java.io.Writer;
import java.util.Enumeration;
import java.util.Hashtable;

/* ---------------------------------------------------------------- */
/** An Applet Block.
 * <p> Lets you set the class name from the program, and optionally, the
 * size and the codebase.
 *
 * <p> This class uses any attributes set in Element.
 *
 * <p><h4>Usage</h4>
 * <pre>
 * org.mortbay.Page page = new org.mortbay.html.Page();
 * page.add(new org.mortbay.Applet("org.mortbay.Foo.App"));
 * </pre>
 *
 * @see org.mortbay.html.Block
 * @version $Id: Applet.java,v 1.7 2004/07/19 13:12:58 hlavac Exp $
 * @author Matthew Watson
*/
public class Applet extends Block
{
    /* ------------------------------------------------------------ */
    public String codeBase = null;

    /* ------------------------------------------------------------ */
    private boolean debug =false;
    private Hashtable params = null;
    private Composite paramHolder = new Composite();
    
    /* ------------------------------------------------------------ */
    /** Create an Applet Element.
     * @param className The name of the class to give for the applet
     */
    public Applet(String className)
    {
        super("applet");
        add(paramHolder);
        attribute("code",className);
    }
    
    /* ------------------------------------------------------------ */
    /** Set the dimensions of the Applet.
     */
    public Applet setDimensions(int height, int width)
    {
        width(width);
        height(height);
        return this;
    }
    
    /* ------------------------------------------------------------ */
    /** Set whether debugging is on in the Applet.
     * <p> This controls whether the org.mortbay.util.Code debug messages
     * will be printed to the java console.
     * <p> Defaults to whether debug is turned on in the generating app */
    public Applet setDebug(boolean debug){
        this.debug = debug;
        return this;
    }
    
    /* ------------------------------------------------------------ */
    /** 
     * Set an alternate display for non-java browsers.
     * @param alt The alternate element to display
     * @deprecated use add
     */
    public Applet setAlternate(Element alt)
    {
        add(alt);
        return this;
    }
    
    /* ------------------------------------------------------------ */
    /** Set an alternate display for non-java browsers.
     * @param alt The alternate element to display 
     * @deprecated use add
     */
    public Applet setAlternate(String alt)
    {
        add(alt);
        return this;
    }
    
    /* ------------------------------------------------------------ */
    /** Set the codebase */
    public Applet codeBase(String cb)
    {
        codeBase = cb;
        return this;
    }
    
    /* ------------------------------------------------------------ */
    public Applet setParam(String name, String value)
    {
        if (params == null)
            params = new Hashtable(10);
        params.put(name, value);
        return this;
    }
    
    /* ------------------------------------------------------------ */
    /** Write out the HTML */
    public void write(Writer out)
         throws IOException
    {
        if (codeBase != null)
            attribute("codebase",codeBase);
        
        if (debug)
            paramHolder.add("<param name=\"debug\" value=\"yes\">");
        if (params != null)
            for (Enumeration enm = params.keys(); enm.hasMoreElements();)
            {
                String key = enm.nextElement().toString();
                paramHolder.add("<param name=\"" + key + "\" value=\"" +
                                params.get(key).toString() + "\">");
            }
        super.write(out);
    }
};