[evolution-data-server/gnome-2-30] Update unseen count as new messages come in

[David Woodhouse <dwmw2 src gnome org>]

commit 35337a75571226e9c363b6719ec608422e568226
Author: David Woodhouse <David Woodhouse intel com>
Date:   Fri Jul 2 11:56:57 2010 +0100

    Update unseen count as new messages come in
    
    When we get notified of new messages in the idle thread, or when they arrive
    during our re-fetch of all flags (and we suddenly find we've got flags for a
    message that didn't previously exist), ensure that we update the unseen count
    according to the flags of the new messages.
    
    This _doesn't_ handle the case where we called fetch_new_messages() directly
    from refresh_info_start() because we _knew_ there were new messages, but in
    fact there are _more_ new messages than we expected. We may have to switch to
    a model where we say 'update flags for any UID greater than $X'.
    (cherry picked from commit f44ecb68679ea3134d7b3c5d5f346b640a11af45)

 camel/providers/imapx/camel-imapx-server.c |   22 ++++++++++++++++++----
 1 files changed, 18 insertions(+), 4 deletions(-)
---
diff --git a/camel/providers/imapx/camel-imapx-server.c b/camel/providers/imapx/camel-imapx-server.c
index ebd08af..2e61b82 100644
--- a/camel/providers/imapx/camel-imapx-server.c
+++ b/camel/providers/imapx/camel-imapx-server.c
@@ -264,6 +264,7 @@ struct _CamelIMAPXJob {
 			/* used for biulding uidset stuff */
 			gint index;
 			gint last_index;
+			gboolean update_unseen;
 			struct _uidset_state uidset;
 			/* changes during refresh */
 			CamelFolderChangeInfo *changes;
@@ -1468,6 +1469,15 @@ imapx_untagged(CamelIMAPXServer *imap, CamelException *ex)
 						finfo->user_flags = NULL;
 					}
 
+					if (!(server_flags & CAMEL_MESSAGE_SEEN)) {
+						if (job->u.refresh_info.update_unseen) {
+							c(printf("Updating unread count for new message %s\n", mi->uid));
+							((CamelIMAPXFolder *)job->folder)->unread_on_server++;
+						} else {
+							c(printf("Not updating unread count for new message %s\n", mi->uid));
+						}
+					}
+
 					binfo = (CamelMessageInfoBase *) mi;
 					binfo->size = finfo->size;
 
@@ -2058,7 +2068,8 @@ camel_imapx_server_idle (CamelIMAPXServer *is, CamelFolder *folder, CamelExcepti
 }
 
 static void
-imapx_server_fetch_new_messages (CamelIMAPXServer *is, CamelFolder *folder, gboolean async, CamelException *ex)
+imapx_server_fetch_new_messages (CamelIMAPXServer *is, CamelFolder *folder, gboolean async,
+				 gboolean update_unseen, CamelException *ex)
 {
 	CamelIMAPXJob *job;
 
@@ -2069,6 +2080,7 @@ imapx_server_fetch_new_messages (CamelIMAPXServer *is, CamelFolder *folder, gboo
 	job->noreply = async;
 	job->ex = ex;
 	job->u.refresh_info.changes = camel_folder_change_info_new();
+	job->u.refresh_info.update_unseen = update_unseen;
 	job->op = camel_operation_registered ();
 
 	if (imapx_register_job (is, job))
@@ -2106,7 +2118,7 @@ imapx_idle_thread (gpointer data)
 
 			if (!camel_exception_is_set (ex) && ifolder->exists_on_server >
 			    camel_folder_summary_count (((CamelFolder *) ifolder)->summary) && imapx_is_command_queue_empty (is))
-				imapx_server_fetch_new_messages (is, is->select_folder, TRUE, ex);
+				imapx_server_fetch_new_messages (is, is->select_folder, TRUE, TRUE, ex);
 
 			if (camel_exception_is_set (ex)) {
 				e(printf ("Caught exception in idle thread:  %s \n", ex->desc));
@@ -3552,7 +3564,9 @@ imapx_job_scan_changes_done(CamelIMAPXServer *is, CamelIMAPXCommand *ic)
 		if (fetch_new) {
 			camel_operation_start (job->op, _("Fetching summary information for new messages in %s"), job->folder->name);
 			imapx_uidset_init(&job->u.refresh_info.uidset, BATCH_FETCH_COUNT, 0);
-			/* command will be free'ed in step_fetch_done */
+			/* These are new messages which arrived since we last knew the unseen count;
+			   update it as they arrive. */
+			job->u.refresh_info.update_unseen = TRUE;
 			imapx_command_step_fetch_done(is, ic);
 			return;
 		}
@@ -3784,7 +3798,7 @@ imapx_job_refresh_info_start (CamelIMAPXServer *is, CamelIMAPXJob *job)
 		if (!total)
 			need_rescan = FALSE;
 
-		imapx_server_fetch_new_messages (is, folder, FALSE, job->ex);
+		imapx_server_fetch_new_messages (is, folder, FALSE, FALSE, job->ex);
 		if (camel_exception_is_set (job->ex))
 			goto done;