[evolution] Bug 779156 - [IMAPx] Not listening for changes after resume from suspend

[Milan Crha <mcrha src gnome org>]

commit 487554dc3ad29d7f035e971d266fbbb2782b73f7
Author: Milan Crha <mcrha redhat com>
Date:   Tue Feb 28 14:39:43 2017 +0100

    Bug 779156 - [IMAPx] Not listening for changes after resume from suspend

 src/libemail-engine/mail-folder-cache.c |   67 +++++++++++++++++++++++++++++++
 1 files changed, 67 insertions(+), 0 deletions(-)
---
diff --git a/src/libemail-engine/mail-folder-cache.c b/src/libemail-engine/mail-folder-cache.c
index cb17722..5662019 100644
--- a/src/libemail-engine/mail-folder-cache.c
+++ b/src/libemail-engine/mail-folder-cache.c
@@ -103,6 +103,8 @@ struct _StoreInfo {
        gulong folder_renamed_handler_id;
        gulong folder_subscribed_handler_id;
        gulong folder_unsubscribed_handler_id;
+       gulong status_handler_id;
+       gulong reachable_handler_id;
 
        GHashTable *folder_info_ht;     /* by full_name */
        gboolean first_update;          /* TRUE, then FALSE forever */
@@ -114,6 +116,8 @@ struct _StoreInfo {
 
        /* Outstanding folderinfo requests */
        GQueue folderinfo_updates;
+
+       CamelServiceConnectionStatus last_status;
 };
 
 struct _FolderInfo {
@@ -278,6 +282,9 @@ store_info_new (CamelStore *store)
                store_info->vtrash = camel_store_get_trash_folder_sync (
                        store, NULL, NULL);
 
+       if (CAMEL_IS_NETWORK_SERVICE (store))
+               store_info->last_status = camel_service_get_connection_status (CAMEL_SERVICE (store));
+
        return store_info;
 }
 
@@ -334,6 +341,18 @@ store_info_unref (StoreInfo *store_info)
                                store_info->folder_unsubscribed_handler_id);
                }
 
+               if (store_info->status_handler_id > 0) {
+                       g_signal_handler_disconnect (
+                               store_info->store,
+                               store_info->status_handler_id);
+               }
+
+               if (store_info->reachable_handler_id > 0) {
+                       g_signal_handler_disconnect (
+                               store_info->store,
+                               store_info->reachable_handler_id);
+               }
+
                g_hash_table_destroy (store_info->folder_info_ht);
 
                g_clear_object (&store_info->store);
@@ -476,6 +495,11 @@ update_closure_free (UpdateClosure *closure)
        g_slice_free (UpdateClosure, closure);
 }
 
+static void
+mail_folder_cache_check_connection_status_cb (CamelStore *store,
+                                             GParamSpec *param,
+                                             gpointer user_data);
+
 static StoreInfo *
 mail_folder_cache_new_store_info (MailFolderCache *cache,
                                   CamelStore *store)
@@ -519,6 +543,14 @@ mail_folder_cache_new_store_info (MailFolderCache *cache,
                store_info->folder_unsubscribed_handler_id = handler_id;
        }
 
+       if (CAMEL_IS_NETWORK_SERVICE (store)) {
+               store_info->status_handler_id = g_signal_connect (store, "notify::connection-status",
+                       G_CALLBACK (mail_folder_cache_check_connection_status_cb), cache);
+
+               store_info->reachable_handler_id = g_signal_connect (store, "notify::host-reachable",
+                       G_CALLBACK (mail_folder_cache_check_connection_status_cb), cache);
+       }
+
        g_mutex_lock (&cache->priv->store_info_ht_lock);
 
        g_hash_table_insert (
@@ -613,6 +645,41 @@ mail_folder_cache_steal_folder_info (MailFolderCache *cache,
        return folder_info;
 }
 
+static void
+mail_folder_cache_check_connection_status_cb (CamelStore *store,
+                                             GParamSpec *param,
+                                             gpointer user_data)
+{
+       MailFolderCache *cache = user_data;
+       StoreInfo *store_info;
+       gboolean was_connecting;
+
+       g_return_if_fail (CAMEL_IS_STORE (store));
+       g_return_if_fail (param != NULL);
+       g_return_if_fail (MAIL_IS_FOLDER_CACHE (cache));
+
+       store_info = mail_folder_cache_ref_store_info (cache, store);
+       if (!store_info)
+               return;
+
+       was_connecting = (store_info->last_status == CAMEL_SERVICE_CONNECTING);
+       store_info->last_status = camel_service_get_connection_status (CAMEL_SERVICE (store));
+
+       if (!was_connecting && store_info->last_status == CAMEL_SERVICE_DISCONNECTED &&
+           g_strcmp0 (param->name, "host-reachable") == 0 &&
+           camel_network_service_get_host_reachable (CAMEL_NETWORK_SERVICE (store))) {
+               CamelProvider *provider;
+
+               provider = camel_service_get_provider (CAMEL_SERVICE (store));
+               if (provider && (provider->flags & CAMEL_PROVIDER_IS_STORAGE) != 0) {
+                       /* Connect it, when the host is reachable */
+                       camel_service_connect (CAMEL_SERVICE (store), G_PRIORITY_DEFAULT, NULL, NULL, NULL);
+               }
+       }
+
+       store_info_unref (store_info);
+}
+
 static gboolean
 mail_folder_cache_update_idle_cb (gpointer user_data)
 {