gecko-dev/grendel/view/ViewedMessageBase.java

240 строки
5.9 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 1.1 (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.
*
* Contributor(s):
*
* Created: Terry Weissman <terry@netscape.com>, 25 Aug 1997.
*/
package grendel.view;
import calypso.util.Assert;
import grendel.storage.MessageExtra;
import grendel.storage.MessageExtraFactory;
import javax.mail.Message;
import javax.mail.MessagingException;
import java.util.Enumeration;
import java.util.NoSuchElementException;
class ViewedMessageBase implements ViewedMessage, IThreadable, ISortable {
MessageSetView fView;
Message fMessage;
ViewedMessage fParent;
ViewedMessage fChildren;
ViewedMessage fSibling;
public int sortkey; // Used to index into cached info
// when sorting.
public ViewedMessageBase(MessageSetView v, Message m) {
fView = v;
fMessage = m;
}
public final MessageSetView getView() {
return fView;
}
public final Message getMessage() {
return fMessage;
}
// ******************* IThreadable methods ****************
class AllEnumerator implements Enumeration {
ViewedMessageBase tail;
Enumeration kids;
AllEnumerator(ViewedMessageBase thread) {
tail = thread;
}
public synchronized Object nextElement() {
if (kids != null) {
// if `kids' is non-null, then we've already returned a node,
// and we should now go to work on its children.
ViewedMessageBase result = (ViewedMessageBase) kids.nextElement();
if (!kids.hasMoreElements()) {
kids = null;
}
return result;
} else if (tail != null) {
// Return `tail', but first note its children, if any.
// We will descend into them the next time around.
ViewedMessageBase result = tail;
if (tail.fChildren != null) {
kids = new AllEnumerator((ViewedMessageBase) tail.fChildren);
}
tail = (ViewedMessageBase) tail.fSibling;
return result;
} else {
throw new NoSuchElementException();
}
}
public synchronized boolean hasMoreElements() {
if (tail != null)
return true;
else if (kids != null && kids.hasMoreElements())
return true;
else
return false;
}
}
public Enumeration allElements() {
return new AllEnumerator(this);
}
public Object messageThreadID() {
try {
return MessageExtraFactory.Get(fMessage).getMessageID();
} catch (MessagingException e) {
return null;
}
}
public Object[] messageThreadReferences() {
try {
return MessageExtraFactory.Get(fMessage).messageThreadReferences();
} catch (MessagingException e) {
return null;
}
}
public String simplifiedSubject() {
try {
return MessageExtraFactory.Get(fMessage).simplifiedSubject();
} catch (MessagingException e) {
return "";
}
}
public boolean subjectIsReply() {
try {
return MessageExtraFactory.Get(fMessage).subjectIsReply();
} catch (MessagingException e) {
return false;
}
}
public Enumeration children() {
return new Enumeration() {
ViewedMessageBase cur = (ViewedMessageBase) fChildren;
public boolean hasMoreElements() {
return (cur != null);
}
public Object nextElement() {
Object result = cur;
cur = (ViewedMessageBase) cur.fSibling;
return result;
}
};
}
public void setNext(Object next) {
fSibling = (ViewedMessage) next;
}
public void setChild(Object kid) {
fChildren = (ViewedMessage) kid;
}
public void setParentPointers(ViewedMessage parent) {
fParent = parent;
ViewedMessageBase v = (ViewedMessageBase) fChildren;
if (v != null) v.setParentPointers(this);
v = (ViewedMessageBase) fSibling;
if (v != null) v.setParentPointers(parent);
}
public IThreadable makeDummy() {
return new DummyThreadable(fView, fMessage);
}
public boolean isDummy() {
return false;
}
public void dump() {
dump(0);
}
void dump(int indent) {
for (int i=0 ; i<indent ; i++) {
System.out.print(" ");
}
System.out.println(this);
if (fChildren != null) {
Assert.Assertion(fChildren.getParent() == this);
((ViewedMessageBase) fChildren).dump(indent + 1);
}
if (fSibling != null) {
Assert.Assertion(fSibling.getParent() == getParent());
((ViewedMessageBase) fSibling).dump(indent);
}
}
public String toString() {
Message m = fMessage;
if (m == null)
return "null";
MessageExtra mextra = MessageExtraFactory.Get(m);
try {
return "Sub: " + (mextra.subjectIsReply() ? "Re: " : "") +
mextra.simplifiedSubject() + " ID: " + mextra.getMessageID();
} catch (MessagingException e) {
return "???";
}
}
public ViewedMessage getParent() {
return fParent;
}
public ViewedMessage getChild() {
return fChildren;
}
public ViewedMessage getNext() {
return fSibling;
}
int getMessageCount() {
int result = 0;
for (ViewedMessageBase m = this ;
m != null ;
m = (ViewedMessageBase) m.fSibling) {
result++;
if (m.fChildren != null) {
result += ((ViewedMessageBase) m.fChildren).getMessageCount();
}
}
return result;
}
}