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Java > Open Source Codes > org > columba > mail > gui > table > action > PreviousUnreadMessageAction


1 //The contents of this file are subject to the Mozilla Public License Version 1.1
2 //(the "License"); you may not use this file except in compliance with the
3 //License. You may obtain a copy of the License at http://www.mozilla.org/MPL/
4 //
5 //Software distributed under the License is distributed on an "AS IS" basis,
6 //WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
7 //for the specific language governing rights and
8 //limitations under the License.
9 //
10 //The Original Code is "The Columba Project"
11 //
12 //The Initial Developers of the Original Code are Frederik Dietz and Timo Stich.
13 //Portions created by Frederik Dietz and Timo Stich are Copyright (C) 2003.
14 //
15 //All Rights Reserved.
16 package org.columba.mail.gui.table.action;
17
18 import java.awt.event.ActionEvent JavaDoc;
19
20 import org.columba.api.gui.frame.IFrameMediator;
21 import org.columba.api.selection.ISelectionListener;
22 import org.columba.api.selection.SelectionChangedEvent;
23 import org.columba.core.command.CommandProcessor;
24 import org.columba.core.gui.action.AbstractColumbaAction;
25 import org.columba.mail.command.IMailFolderCommandReference;
26 import org.columba.mail.gui.frame.MailFrameMediator;
27 import org.columba.mail.gui.frame.TableViewOwner;
28 import org.columba.mail.gui.message.command.ViewMessageCommand;
29 import org.columba.mail.gui.table.IMessageNode;
30 import org.columba.mail.gui.table.ITableController;
31 import org.columba.mail.gui.table.model.MessageNode;
32 import org.columba.mail.gui.table.selection.TableSelectionChangedEvent;
33 import org.columba.mail.message.IColumbaHeader;
34 import org.columba.mail.util.MailResourceLoader;
35
36 /**
37  * Select previous unread message in message list.
38  * <p>
39  * Note that this action is also used in the message-frame (frame without
40  * folder tree and without message list), which depends on the parent frame
41  * for referencing messages.
42  *
43  * @see org.columba.mail.gui.messageframe.MessageFrameController
44  *
45  * @author fdietz
46  */
47 public class PreviousUnreadMessageAction extends AbstractColumbaAction
48         implements ISelectionListener {
49     public PreviousUnreadMessageAction(IFrameMediator frameMediator) {
50         super(frameMediator, MailResourceLoader.getString("menu", "mainframe",
51                 "menu_view_prevunreadmessage"));
52
53         // tooltip text
54 putValue(SHORT_DESCRIPTION, MailResourceLoader.getString("menu",
55                 "mainframe", "menu_view_prevunreadmessage_tooltip").replaceAll(
56                 "&", ""));
57
58         // shortcut key
59 //putValue(ACCELERATOR_KEY,
60 // KeyStroke.getKeyStroke(KeyEvent.VK_BRACELEFT, 0));
61
62         //setEnabled(false);
63
64         // uncomment to enable action
65
66         /*
67          * ((MailFrameMediator)
68          * frameMediator).registerTableSelectionListener(this);
69          */
70     }
71
72     /**
73      *
74      * @see java.awt.event.ActionListener#actionPerformed(java.awt.event.ActionEvent)
75      */
76     public void actionPerformed(ActionEvent JavaDoc evt) {
77         IMailFolderCommandReference r = ((MailFrameMediator) getFrameMediator())
78                 .getTableSelection();
79         ITableController table = ((TableViewOwner) getFrameMediator())
80                 .getTableController();
81         if ( table == null ) return;
82         
83         if (r == null)
84             return;
85
86         IMessageNode[] nodes = table.getSelectedNodes();
87         if (nodes.length == 0)
88             return;
89
90         MessageNode node = (MessageNode) nodes[0];
91         MessageNode previousNode = node;
92         boolean seen = true;
93         while (seen) {
94             previousNode = (MessageNode) previousNode.getPreviousNode();
95             if (previousNode == null)
96                 return;
97
98             IColumbaHeader h = previousNode.getHeader();
99             seen = h.getFlags().getSeen();
100         }
101
102         // necessary for the message-frame only
103 r.setUids(new Object JavaDoc[] { previousNode.getUid() });
104         ((MailFrameMediator) getFrameMediator()).setTableSelection(r);
105         CommandProcessor.getInstance().addOp(new ViewMessageCommand(
106                 getFrameMediator(), r));
107
108         // select message in message list
109 table.setSelected(new Object JavaDoc[] { previousNode.getUid() });
110     }
111
112     /**
113      *
114      * @see org.columba.core.gui.util.ISelectionListener#connectionChanged(org.columba.core.gui.util.SelectionChangedEvent)
115      */
116     public void selectionChanged(SelectionChangedEvent e) {
117         setEnabled(((TableSelectionChangedEvent) e).getUids().length > 0);
118     }
119 }
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