indicate in the contact list when we have non read messages from a contact

src/net/java/sip/communicator/impl/gui/main/contactlist/ContactList.java

@@ -1195,5 +1195,5 @@ public void addHistoryWindowForContact(MetaContact contact,
     public void removeHistoryWindowForContact(MetaContact contact)
     {
         contactHistory.remove(contact);
-    }
+    }   
 }

src/net/java/sip/communicator/impl/gui/main/contactlist/ContactListModel.java

@@ -7,6 +7,10 @@
 
 package net.java.sip.communicator.impl.gui.main.contactlist;
 
+import java.awt.Graphics;
+import java.awt.Image;
+import java.awt.image.BufferedImage;
+import java.awt.image.WritableRaster;
 import java.util.*;
 
 import javax.swing.*;
@@ -36,7 +40,14 @@ public class ContactListModel
     private MetaContactGroup rootGroup;
 
     private Vector closedGroups = new Vector();
-
+    
+    /**
+     * A list of all contacts that are currently "active". An "active" contact
+     * is a contact that has been sent a message. The list is used to indicate
+     * these contacts with a special icon. 
+     */
+    private Vector activeContacts = new Vector();
+    
     private boolean showOffline = true;
 
     /**
@@ -207,8 +218,32 @@ public PresenceStatus getMetaContactStatus(MetaContact metaContact)
      */
     public ImageIcon getMetaContactStatusIcon(MetaContact contact)
     {
-        return new ImageIcon(Constants.getStatusIcon(this
-            .getMetaContactStatus(contact)));
+        BufferedImage statusImage = Constants.getStatusIcon(this
+                .getMetaContactStatus(contact));
+     
+        WritableRaster raster = statusImage.copyData( null );
+        BufferedImage statusImageCopy = new BufferedImage(
+                statusImage.getColorModel(),
+                raster,
+                statusImage.isAlphaPremultiplied(), null );
+        
+        Graphics g = statusImageCopy.getGraphics();
+        
+        g.drawImage(statusImage, 0, 0, null);
+        
+        if(activeContacts.contains(contact))
+        {   
+            Image msgReceivedImage
+                = ImageLoader.getImage(ImageLoader.MESSAGE_RECEIVED_ICON);
+            
+            g.drawImage(msgReceivedImage, 0,
+                5,
+                null);
+        }
+        
+        ImageIcon statusIcon = new ImageIcon(statusImageCopy);
+        
+        return statusIcon;
     }
 
     /**
@@ -556,4 +591,45 @@ private boolean containsOnlineContacts(MetaContactGroup group)
 
         return false;
     }
+    
+    /**
+     * Adds the given <tt>MetaContact</tt> to the list of active contacts.
+     * 
+     * @param metaContact the <tt>MetaContact</tt> to add.
+     */
+    public void addActiveContact(MetaContact metaContact)
+    {
+        synchronized (activeContacts)
+        {
+            this.activeContacts.add(metaContact);
+        }
+    }
+    
+    /**
+     * Removes the given <tt>MetaContact</tt> from the list of active contacts.
+     * 
+     * @param metaContact the <tt>MetaContact</tt> to remove.
+     */
+    public void removeActiveContact(MetaContact metaContact)
+    {
+        synchronized (activeContacts)
+        {
+            this.activeContacts.remove(metaContact);
+        }
+    }
+    
+    /**
+     * Checks if the given contact is currently active.
+     * 
+     * @param metaContact the <tt>MetaContact</tt> to verify
+     * @return TRUE if the given <tt>MetaContact</tt> is active, FALSE -
+     * otherwise
+     */
+    public boolean isContactActive(MetaContact metaContact)
+    {
+        synchronized (activeContacts)
+        {
+            return this.activeContacts.contains(metaContact);
+        }
+    }
 }

src/net/java/sip/communicator/impl/gui/main/contactlist/ContactListPanel.java

@@ -217,18 +217,30 @@ public void messageReceived(MessageReceivedEvent evt)
         MetaContact metaContact = mainFrame.getContactList()
                 .findMetaContactByContact(protocolContact);
         
-        ChatPanel chatPanel = chatWindowManager.getContactChat(
-            metaContact, protocolContact, message.getMessageUID());
-                
-        chatPanel.processMessage(protocolContact.getDisplayName(), date,
-            Constants.INCOMING_MESSAGE, message.getContent());            
-        
-        chatWindowManager.openChat(chatPanel, false);
-        
-        GuiActivator.getAudioNotifier()
-            .createAudio(Sounds.INCOMING_MESSAGE).play();
-        
-        chatPanel.treatReceivedMessage(protocolContact);
+        if(metaContact != null)
+        {
+            ContactListModel clistModel = (ContactListModel) contactList.getModel();
+            clistModel.addActiveContact(metaContact);
+            contactList.modifyContact(metaContact);
+            
+            ChatPanel chatPanel = chatWindowManager.getContactChat(
+                metaContact, protocolContact, message.getMessageUID());
+                    
+            chatPanel.processMessage(protocolContact.getDisplayName(), date,
+                Constants.INCOMING_MESSAGE, message.getContent());            
+            
+            chatWindowManager.openChat(chatPanel, false);
+            
+            GuiActivator.getAudioNotifier()
+                .createAudio(Sounds.INCOMING_MESSAGE).play();
+            
+            chatPanel.treatReceivedMessage(protocolContact);
+        }
+        else
+        {
+            logger.trace("MetaContact not found for protocol contact: "
+                    + protocolContact + ".");
+        }
     }
 
     /**