[evolution] I#76 - Message Source window can close immediately

[Milan Crha <mcrha src gnome org>]

commit 543aa80c32fbd3261e908443d1ffcb2993bbbe02
Author: Milan Crha <mcrha redhat com>
Date:   Wed Jan 9 14:05:57 2019 +0100

    I#76 - Message Source window can close immediately
    
    Closes https://gitlab.gnome.org/GNOME/evolution/issues/76

 src/mail/message-list.c | 30 ++++++++++++++++++++----------
 1 file changed, 20 insertions(+), 10 deletions(-)
---
diff --git a/src/mail/message-list.c b/src/mail/message-list.c
index 70d3fd372a..19baff901b 100644
--- a/src/mail/message-list.c
+++ b/src/mail/message-list.c
@@ -4902,11 +4902,8 @@ message_list_folder_changed (CamelFolder *folder,
                             MessageList *message_list)
 {
        CamelFolderChangeInfo *altered_changes = NULL;
-       ETreeModel *tree_model;
+       RegenData *regen_data;
        gboolean need_list_regen = TRUE;
-       gboolean hide_junk;
-       gboolean hide_deleted;
-       gint i;
 
        g_return_if_fail (CAMEL_IS_FOLDER (folder));
        g_return_if_fail (changes != NULL);
@@ -4915,19 +4912,29 @@ message_list_folder_changed (CamelFolder *folder,
        if (message_list->priv->destroyed)
                return;
 
-       tree_model = E_TREE_MODEL (message_list);
-
-       hide_junk = message_list_get_hide_junk (message_list, folder);
-       hide_deleted = message_list_get_hide_deleted (message_list, folder);
+       regen_data = message_list_ref_regen_data (message_list);
 
        d (
-               printf ("%s: changes:%p added:%d removed:%d changed:%d recent:%d for '%s'\n", G_STRFUNC, 
changes,
+               printf ("%s: regen_data:%p changes:%p added:%d removed:%d changed:%d recent:%d for '%s'\n",
+               G_STRFUNC, regen_data, changes,
                changes ? changes->uid_added->len : -1,
                changes ? changes->uid_removed->len : -1,
                changes ? changes->uid_changed->len : -1,
                changes ? changes->uid_recent->len : -1,
                camel_folder_get_full_name (folder)));
-       if (changes != NULL) {
+
+       /* Skip the quick update when the message list is being regenerated */
+       if (changes && !regen_data) {
+               ETreeModel *tree_model;
+               gboolean hide_junk;
+               gboolean hide_deleted;
+               gint i;
+
+               tree_model = E_TREE_MODEL (message_list);
+
+               hide_junk = message_list_get_hide_junk (message_list, folder);
+               hide_deleted = message_list_get_hide_deleted (message_list, folder);
+
                for (i = 0; i < changes->uid_removed->len; i++)
                        g_hash_table_remove (
                                message_list->normalised_hash,
@@ -4978,6 +4985,9 @@ message_list_folder_changed (CamelFolder *folder,
 
        if (altered_changes != NULL)
                camel_folder_change_info_free (altered_changes);
+
+       if (regen_data)
+               regen_data_unref (regen_data);
 }
 
 typedef struct _FolderChangedData {