Refactor suppression of deleted messages into MessagingController.

Re-enable instant deletes in MessageView

Deleted message suppression should be generalized into a flag cache,
serving Seen, Flagged, and Answered flags, as well.

Copy message to Trash still needs work, so that no duplicates are ever
visible and server-sync is more clean.  This will be especially
important, as the same code will be needed for the future "message
copy/move" facility.

src/com/android/email/MessagingController.java

@@ -14,6 +14,7 @@ import java.util.Iterator;
 import java.util.List;
 import java.util.Set;
 import java.util.concurrent.BlockingQueue;
+import java.util.concurrent.ConcurrentHashMap;
 import java.util.concurrent.CopyOnWriteArraySet;
 import java.util.concurrent.LinkedBlockingQueue;
 import java.util.concurrent.TimeUnit;
@@ -112,6 +113,82 @@ public class MessagingController implements Runnable {
     private boolean mBusy;
     private Application mApplication;
     
+    // Key is accountUuid:folderName:messageUid   ,   value is unimportant
+    private ConcurrentHashMap<String, String> deletedUids = new ConcurrentHashMap<String, String>();
+    
+    // Key is accountUuid:folderName   ,  value is a long of the highest message UID ever emptied from Trash
+    private ConcurrentHashMap<String, Long> expungedUid = new ConcurrentHashMap<String, Long>();
+
+    
+    private String createMessageKey(Account account, String folder, Message message)
+    {
+      return account.getUuid() + ":" + folder + ":" + message.getUid();
+    }
+    
+    private String createFolderKey(Account account, String folder)
+    {
+      return account.getUuid() + ":" + folder;
+    }
+    
+    private void suppressMessage(Account account, String folder, Message message)
+    {
+      
+      if (account == null || folder == null || message == null)
+      {
+        return;
+      }
+      String messKey = createMessageKey(account, folder, message);
+      Log.d(Email.LOG_TAG, "Suppressing message with key " + messKey);
+      deletedUids.put(messKey, "true");
+    }
+    
+    private void unsuppressMessage(Account account, String folder, Message message)
+    {
+      if (account == null || folder == null || message == null)
+      {
+        return;
+      }
+      String messKey = createMessageKey(account, folder, message);
+      Log.d(Email.LOG_TAG, "Unsuppressing message with key " + messKey);
+      deletedUids.remove(messKey);
+    }
+    
+    
+    private boolean isMessageSuppressed(Account account, String folder, Message message)
+    {
+      if (account == null || folder == null || message == null)
+      {
+        return false;
+      }
+      String messKey = createMessageKey(account, folder, message);
+      Log.d(Email.LOG_TAG, "Checking suppression of message with key " + messKey);
+      if (deletedUids.containsKey(messKey))
+      {
+        Log.d(Email.LOG_TAG, "Message with key " + messKey + " is suppressed");
+        return true;
+      }
+      Long expungedUidL = expungedUid.get(createFolderKey(account, folder));
+      if (expungedUidL != null)
+      {
+        long expungedUid = expungedUidL;
+        String messageUidS = message.getUid();
+        try
+        {
+          long messageUid = Long.parseLong(messageUidS);
+          if (messageUid <= expungedUid)
+          {
+            return false;
+          }
+        }
+        catch (NumberFormatException nfe)
+        {
+          // Nothing to do
+        }
+      }
+      return false;
+    }
+    
+    
     
     
     private MessagingController(Application application) {
@@ -380,7 +457,9 @@ public class MessagingController implements Runnable {
             Message[] localMessages = localFolder.getMessages(null);
             ArrayList<Message> messages = new ArrayList<Message>();
             for (Message message : localMessages) {
-                if (!message.isSet(Flag.DELETED)) {
+              
+                if (!message.isSet(Flag.DELETED) &&
+                    isMessageSuppressed(account, localFolder.getName(), message) == false) {
                     messages.add(message);
                 }
             }
@@ -689,11 +768,14 @@ s             * critical data as fast as possible, and then we'll fill in the de
                                          * (POP) may not be able to give us headers for
                                          * ENVELOPE, only size.
                                          */
+                                      if (isMessageSuppressed(account, folder, message) == false)
+                                      {
                                         for (MessagingListener l : getListeners()) {
                                             l.synchronizeMailboxNewMessage(account, folder,
                                                     localFolder.getMessage(message.getUid()));
                                         }
                                       }
+                                    }
 
                                 }
                                 catch (Exception e) {
@@ -740,7 +822,8 @@ s             * critical data as fast as possible, and then we'll fill in the de
                       messageChanged = true;
                     }
                   }
-                  if (messageChanged) {
+                  if (messageChanged && isMessageSuppressed(account, folder, localMessage) == false)
+                  {
                     for (MessagingListener l : getListeners()) {
                       l.synchronizeMailboxNewMessage(account, folder, localMessage);
                     }
@@ -825,7 +908,8 @@ s             * critical data as fast as possible, and then we'll fill in the de
 
                         // Set a flag indicating this message has now be fully downloaded
                         localMessage.setFlag(Flag.X_DOWNLOADED_FULL, true);
-
+                        if (isMessageSuppressed(account, folder, localMessage) == false)
+                        {
                           // Update the listener with what we've found
                           for (MessagingListener l : getListeners()) {
                               l.synchronizeMailboxNewMessage(
@@ -834,6 +918,7 @@ s             * critical data as fast as possible, and then we'll fill in the de
                                       localMessage);
                           }
                         }
+                    }
                     catch (MessagingException me) {
                       addErrorMessage(account, me);
 
@@ -919,7 +1004,8 @@ s             * critical data as fast as possible, and then we'll fill in the de
                     // viewed.
                     localMessage.setFlag(Flag.X_DOWNLOADED_FULL, true);
                 }
-
+                if (isMessageSuppressed(account, folder, message) == false)
+                {
                   // Update the listener with what we've found
                   for (MessagingListener l : getListeners()) {
                       l.synchronizeMailboxNewMessage(
@@ -928,6 +1014,7 @@ s             * critical data as fast as possible, and then we'll fill in the de
                               localFolder.getMessage(message.getUid()));
                   }
                 }
+            }
             if (Config.LOGV) {
         			Log.v(Email.LOG_TAG, "SYNC: Done fetching large messages for folder " + folder);
         		}
@@ -1898,6 +1985,8 @@ s             * critical data as fast as possible, and then we'll fill in the de
     
     public void deleteMessage(final Account account, final String folder, final Message message,
             final MessagingListener listener) {
+      suppressMessage(account, folder, message);
+      
       put("deleteMessage", null, new Runnable() {
         public void run() {
           deleteMessageSynchronous(account, folder, message, listener);
@@ -1907,11 +1996,16 @@ s             * critical data as fast as possible, and then we'll fill in the de
     
     private void deleteMessageSynchronous(final Account account, final String folder, final Message message,
         MessagingListener listener) {
+      
+      account.getUuid();
+      message.getUid();
+      
         try {
             Store localStore = Store.getInstance(account.getLocalStoreUri(), mApplication);
             Folder localFolder = localStore.getFolder(folder);
             Message lMessage = localFolder.getMessage(message.getUid());
-            
+            if (lMessage != null)
+            {
               if (folder.equals(account.getTrashFolderName()))
               {
                 if (Config.LOGD)
@@ -1947,13 +2041,15 @@ s             * critical data as fast as possible, and then we'll fill in the de
                   }
                 }
               }
+            }
             localFolder.close(false);
+            unsuppressMessage(account, folder, message);
             if (listener != null) {
               listener.messageDeleted(account, folder, message);
             }
-//            for (MessagingListener l : getListeners()) {
+            for (MessagingListener l : getListeners()) {
-//              l.folderStatusChanged(account, account.getTrashFolderName());
+              l.folderStatusChanged(account, account.getTrashFolderName());
-//          }
+          }
             
             if (Config.LOGD)
           	{

src/com/android/email/activity/FolderMessageList.java

@@ -395,8 +395,7 @@ public class FolderMessageList extends ExpandableListActivity
             // Lower our priority
             Process.setThreadPriority(Process.THREAD_PRIORITY_BACKGROUND);
             // Synchronously load the list of local messages
-            MessagingController.getInstance(getApplication()).listLocalMessages(
+            
-					mAccount, mFolder, mAdapter.mListener);
 			try
 			{
 				Store localStore = Store.getInstance(mAccount.getLocalStoreUri(),
@@ -418,6 +417,11 @@ public class FolderMessageList extends ExpandableListActivity
                 // at it's leisure
                 MessagingController.getInstance(getApplication()).synchronizeMailbox(
 						mAccount, mFolder, mAdapter.mListener);
+      }
+			else
+			{
+			  MessagingController.getInstance(getApplication()).listLocalMessages(
+	          mAccount, mFolder, mAdapter.mListener);
 			}
         }
     }
@@ -611,8 +615,9 @@ public class FolderMessageList extends ExpandableListActivity
 
 		final FolderInfoHolder folder = (FolderInfoHolder) mAdapter
 				.getGroup(groupPosition);
-		if (folder.messages.size() == 0)
+		if (folder.messages.size() == 0 || folder.needsRefresh)
 		{
+		  folder.needsRefresh = false;
 			new Thread(new FolderUpdateWorker(folder.name, false)).start();
         }
     }
@@ -771,24 +776,16 @@ public class FolderMessageList extends ExpandableListActivity
 		{
 		  holder.folder.unreadMessageCount--;
 		}
+		FolderInfoHolder trashHolder = mAdapter.getFolder(mAccount.getTrashFolderName());
+		if (trashHolder != null)
+		{
+		  trashHolder.needsRefresh = true;
+		}
 
     mAdapter.removeMessage(holder.message.getFolder().getName(), holder.uid);
-    if (holder.folder.name.equals(mAccount.getTrashFolderName()) == false) {
-      mAdapter.addOrUpdateMessage(mAccount.getTrashFolderName(), holder.message);
-    }
     
     MessagingController.getInstance(getApplication()).deleteMessage(mAccount,
-        holder.message.getFolder().getName(), holder.message, 
+        holder.message.getFolder().getName(), holder.message, null);
-        new MessagingListener() {
-      @Override
-      public void messageDeleted(Account account, String folder, Message message) {
-       if (account != mAccount) {
-         return;
-       }
-       mAdapter.removeDeletedUid(folder, message.getUid());
-      }
-    }
-    );
 
     }
 
@@ -832,7 +829,6 @@ public class FolderMessageList extends ExpandableListActivity
 	    public void controllerCommandCompleted(boolean moreToDo)
 	    {
 	      Log.v(Email.LOG_TAG, "Empty Trash background task completed");
-	      mAdapter.removeAllDeletedUids(account.getTrashFolderName());
 	    }
 	  };
 	  
@@ -1280,9 +1276,6 @@ public class FolderMessageList extends ExpandableListActivity
                     return;
                 }
 				FolderInfoHolder holder = getFolder(folder);
-//				if (holder != null) {
-//				  holder.deletedUids.clear();
-//				}
                 mHandler.progress(false);
                 mHandler.folderLoading(folder, false);
 			//	mHandler.folderStatus(folder, null);
@@ -1311,7 +1304,6 @@ public class FolderMessageList extends ExpandableListActivity
 				if (holder != null)
 				{
                     holder.lastChecked = 0;
-              //      holder.deletedUids.clear();
                 }
 				mHandler.folderSyncing(null);
             }
@@ -1327,6 +1319,16 @@ public class FolderMessageList extends ExpandableListActivity
                 addOrUpdateMessage(folder, message);
             }
 
+            
+            
+            @Override
+              public void messageDeleted(Account account,
+                  String folder, Message message)
+            {
+              synchronizeMailboxRemovedMessage(account,
+                  folder, message);
+            }
+              
               @Override  
 			public void synchronizeMailboxRemovedMessage(Account account,
 					String folder, Message message)
@@ -1422,23 +1424,6 @@ public class FolderMessageList extends ExpandableListActivity
           R.drawable.ic_mms_answered_small);
         }
 		
-		public void removeDeletedUid(String folder, String messageUid) {
-		  FolderInfoHolder f = getFolder(folder);
-      if (f != null)
-      {
-        f.deletedUids.remove(messageUid);
-      }
-		}
-		
-		public void removeAllDeletedUids(String folder)
-		{
-		  FolderInfoHolder f = getFolder(folder);
-      if (f != null)
-      {
-        f.deletedUids.clear();
-      }
-		}
-		
 		public void removeAllMessages(String folder)
 		{
 	     FolderInfoHolder f = getFolder(folder);
@@ -1465,9 +1450,7 @@ public class FolderMessageList extends ExpandableListActivity
 			{
                 return;
             }
-			if (f.deletedUids.contains(messageUid) == false) {
+			
-			  f.deletedUids.add(messageUid);
-			}
             mHandler.removeMessage(f, m);
         }
 
@@ -1489,9 +1472,6 @@ public class FolderMessageList extends ExpandableListActivity
         private void addOrUpdateMessage(FolderInfoHolder folder, Message message,
 				boolean sort, boolean notify)
 		{
-          if (folder.deletedUids.contains(message.getUid())){
-            return;
-          }
             MessageInfoHolder m = getMessage(folder, message.getUid());
 			if (m == null)
 			{
@@ -1855,7 +1835,8 @@ public class FolderMessageList extends ExpandableListActivity
 
             public boolean lastCheckFailed;
             
-            public List<String> deletedUids = Collections.synchronizedList(new ArrayList<String>());
+            public boolean needsRefresh = false;
+            
             /**
              * Outbox is handled differently from any other folder.
              */

src/com/android/email/activity/MessageView.java

@@ -528,10 +528,11 @@ public class MessageView extends Activity
             
            findSurroundingMessagesUid();
             
-            MessagingListener listener = new MessagingListener()
+            MessagingController.getInstance(getApplication()).deleteMessage(
-            {
+                accountForDelete,
-              public void messageDeleted(Account account, String folder, Message message)
+                folderForDelete,
-              {
+                messageToDelete,
+                null);
             if (mNextMessageUid != null) {
               onNext();
             }
@@ -540,15 +541,6 @@ public class MessageView extends Activity
             } else {
                 finish();
             }
-              }
-            };
-            MessagingListener waitListener = listener;
-            
-            MessagingController.getInstance(getApplication()).deleteMessage(
-                accountForDelete,
-                folderForDelete,
-                messageToDelete,
-                waitListener);
             
   
         }
@@ -847,12 +839,16 @@ public class MessageView extends Activity
 
     private void renderAttachments(Part part, int depth) throws MessagingException {
         String contentType = MimeUtility.unfoldAndDecode(part.getContentType());
+        String contentDisposition = MimeUtility.unfoldAndDecode(part.getDisposition());
         String name = MimeUtility.getHeaderParameter(contentType, "name");
+        if (name == null)
+        {
+          name = MimeUtility.getHeaderParameter(contentDisposition, "filename");
+        }
         if (name != null) {
             /*
              * We're guaranteed size because LocalStore.fetch puts it there.
              */
-            String contentDisposition = MimeUtility.unfoldAndDecode(part.getDisposition());
             int size = Integer.parseInt(MimeUtility.getHeaderParameter(contentDisposition, "size"));
 
             Attachment attachment = new Attachment();