[evolution] Bug 712668 - Disable message recovery after initial scan

[Matthew Barnes <mbarnes src gnome org>]

commit 66923efa0ce1cb1d00440010b461ad463a200186
Author: Matthew Barnes <mbarnes redhat com>
Date:   Mon Nov 25 15:15:22 2013 -0500

    Bug 712668 - Disable message recovery after initial scan
    
    This prevents Evolution from prompting to restore what it thinks are
    orphaned messages during an Evolution session.  This is triggered by
    a shell window emitting another "map-event" signal for some reason.
    
    Some GNOME Shell users have reported seeing this.

 modules/composer-autosave/e-composer-registry.c |   12 +++++++++++-
 1 files changed, 11 insertions(+), 1 deletions(-)
---
diff --git a/modules/composer-autosave/e-composer-registry.c b/modules/composer-autosave/e-composer-registry.c
index b8bb3c5..faf58a1 100644
--- a/modules/composer-autosave/e-composer-registry.c
+++ b/modules/composer-autosave/e-composer-registry.c
@@ -35,6 +35,7 @@
 struct _EComposerRegistryPrivate {
        GQueue composers;
        gboolean orphans_restored;
+       gulong map_event_handler_id;
 };
 
 G_DEFINE_DYNAMIC_TYPE (
@@ -127,6 +128,12 @@ composer_registry_map_event_cb (GtkWindow *parent,
        composer_registry_restore_orphans (registry, parent);
        registry->priv->orphans_restored = TRUE;
 
+       /* This is a one-time-only signal handler.
+        * Disconnect from subsequent map events. */
+       g_signal_handler_disconnect (
+               parent, registry->priv->map_event_handler_id);
+       registry->priv->map_event_handler_id = 0;
+
        return FALSE;
 }
 
@@ -148,10 +155,13 @@ composer_registry_window_added_cb (GtkApplication *application,
        /* Offer to restore any orphaned auto-save files from the
         * previous session once the first EShellWindow is mapped. */
        if (E_IS_SHELL_WINDOW (window) && !registry->priv->orphans_restored) {
-               g_signal_connect (
+               gulong handler_id;
+
+               handler_id = g_signal_connect (
                        window, "map-event",
                        G_CALLBACK (composer_registry_map_event_cb),
                        registry);
+               registry->priv->map_event_handler_id = handler_id;
 
        /* Track the new composer window. */
        } else if (E_IS_MSG_COMPOSER (window)) {