ClipboardKids.java

/*
 *                 Sun Public License Notice
 * 
 * The contents of this file are subject to the Sun Public License
 * Version 1.0 (the "License"). You may not use this file except in
 * compliance with the License. A copy of the License is available at
 * http://www.sun.com/
 * 
 * The Original Code is Forte for Java, Community Edition. The Initial
 * Developer of the Original Code is Sun Microsystems, Inc. Portions
 * Copyright 1997-2000 Sun Microsystems, Inc. All Rights Reserved.
 */

package org.netbeans.modules.apisupport.beanbrowser;

import java.awt.datatransfer.*;
import java.util.*;

import org.openide.nodes.*;
import org.openide.util.datatransfer.*;

/** Children list of a Clipboard.
* Each key is a DataFlavor.
*/
public class ClipboardKids extends Children.Keys {

    private Clipboard clip;
    private ClipboardListener list;

    public ClipboardKids (Clipboard clip) {
        this.clip = clip;
    }

    protected void addNotify () {
        updateKeys ();
        if (list == null && (clip instanceof ExClipboard)) {
            list = new ClipboardListener () {
                       public void clipboardChanged (ClipboardEvent ev) {
                           updateKeys ();
                       }
                   };
            ((ExClipboard) clip).addClipboardListener (list);
        }
    }
    private void cleanUp () {
        if (list != null) {
            ((ExClipboard) clip).removeClipboardListener (list);
            list = null;
        }
    }
    protected void removeNotify () {
        cleanUp ();
        setKeys (Collections.EMPTY_SET);
    }
    protected void finalize () {
        cleanUp ();
    }

    private void updateKeys () {
        Transferable t = clip.getContents (null);
        if (t == null)
            setKeys (Collections.EMPTY_SET);
        else
            setKeys (t.getTransferDataFlavors ());
    }

    protected Node[] createNodes (Object key) {
        DataFlavor flav = (DataFlavor) key;
        try {
            Object obj = clip.getContents (null).getTransferData (flav);
            if (obj instanceof MultiTransferObject) {
                MultiTransferObject mto = (MultiTransferObject) obj;
                List nue = new LinkedList ();
                int count = mto.getCount ();
                for (int i = 0; i < count; i++) {
                    nue.add (PropSetKids.makePlainNode ("MultiTransferObject [" + i + "]"));
                    DataFlavor[] flavs = mto.getTransferDataFlavors (i);
                    for (int j = 0; j < flavs.length; j++) {
                        try {
                            nue.add (makeFlavorNode (flavs[j], mto.getTransferData (i, flavs[j])));
                        } catch (Exception e) {
                            nue.add (PropSetKids.makeErrorNode (e));
                        }
                    }
                }
                nue.add (PropSetKids.makePlainNode ("MultiTransferObject [end]"));
                return (Node[]) nue.toArray (new Node[nue.size ()]);
            } else {
                return new Node[] { makeFlavorNode (flav, obj) };
            }
        } catch (Exception e) {
            return new Node[] { PropSetKids.makeErrorNode (e) };
        }
    }

    private static Node makeFlavorNode (DataFlavor flav, Object obj) {
        Node n = PropSetKids.makeObjectNode (obj);
        n.setDisplayName (flav.getHumanPresentableName () + " = " + n.getDisplayName ());
        return n;
    }

}

/*
 * Log
 *  2    Gandalf-post-FCS1.0.2.0     3/9/00   Jesse Glick     Backport of 1.0.1.0 from
 *       Jaga.
 *  1    Gandalf   1.0         2/4/00   Jesse Glick     
 * $
 */