gecko-dev/grendel/ui/MessageDisplayManager.java
1998-09-09 00:52:38 +00:00

114 lines
3.3 KiB
Java

/* -*- Mode: java; indent-tabs-mode: nil; c-basic-offset: 2 -*-
*
* The contents of this file are subject to the Mozilla Public License
* Version 1.0 (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.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS"
* basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
* the License for the specific language governing rights and limitations
* under the License.
*
* The Original Code is the Grendel mail/news client.
*
* The Initial Developer of the Original Code is Netscape Communications
* Corporation. Portions created by Netscape are Copyright (C) 1997
* Netscape Communications Corporation. All Rights Reserved.
*
* Created: Will Scullin <scullin@netscape.com>, 3 Sep 1997.
*/
package grendel.ui;
import javax.mail.Folder;
import javax.mail.Message;
/**
* Handles attempts to view messages, folders and their contents,
* without assuptions about the UI layout.
* Potential side affects for given actions are detailed.
* The resulting window state should be order independent <b>if</b>
* overlapping arguments are the same with the exception
* of window focus. That is, <pre>
* displayMaster(folderA);
* displayFolder(folderA, messageA);
* </pre>
* should result in the same windows and selections as <pre>
* displayFolder(foldarA, messageA);
* displayMaster(folderA);
* </pre>
* but the result of <pre>
* displayFolder(folderA, messageA);
* displayMaster(folderB):
* </pre>
* is undefined. If multiple windows are opened as the result of
* multiple calls, focus will be shifted to the last opened
* window. Focus will always be shifted to the last acted upon
* view.
*/
public abstract class MessageDisplayManager {
static volatile MessageDisplayManager fManager;
static {
System.out.println("MessageDisplayManager.<clinit>");
}
/**
* Sets the default message display manager
*/
public static synchronized void SetDefaultManager(MessageDisplayManager
aManager) {
fManager = aManager;
System.out.println("Setting manager: " + aManager);
}
/**
* Gets the default message display manager
*/
public static synchronized MessageDisplayManager GetDefaultManager() {
System.out.println("Getting manager: " + fManager);
return fManager;
}
/**
* Displays a message given a Message object. This
* may affect displayed folders.
*/
public abstract void displayMessage(Message aMessage);
/**
* Displays a folder given a folder object. This may
* affect displayed messages.
*/
public abstract void displayFolder(Folder aFolder);
/**
* Displays folder given a Folder object and
* selects a message in that folder given a Message
* object. This may or may not also display the message, but
* it will not open multiple windows.
*/
public abstract void displayFolder(Folder aFolder, Message aMessage);
/**
* Displays the master (A folder tree, for now). This should not
* affect displayed folders or messages.
*/
public abstract void displayMaster();
/**
* Displays the master with the given folder selected. This
* may affect displayed folders and messages.
*/
public abstract void displayMaster(Folder aFolder);
}