[geary/mjog/user-plugins: 17/26] Application.PluginManager: Add close method

[Michael Gratton <mjog src gnome org>]

commit 03331fd231e09d36ca39d879fde3dc10383912bb
Author: Michael Gratton <mike vee net>
Date:   Tue Mar 10 13:00:16 2020 +1100

    Application.PluginManager: Add close method
    
    Add close method, call it from the controller when shutting down, so
    that plugins are actually deactivated and can release resources.

 src/client/application/application-controller.vala     | 5 +++++
 src/client/application/application-plugin-manager.vala | 6 ++++++
 2 files changed, 11 insertions(+)
---
diff --git a/src/client/application/application-controller.vala 
b/src/client/application/application-controller.vala
index 556da0ad..47143389 100644
--- a/src/client/application/application-controller.vala
+++ b/src/client/application/application-controller.vala
@@ -303,6 +303,11 @@ internal class Application.Controller : Geary.BaseObject {
 
         // Release general resources now there's no more UI
         this.notifications.clear_folders();
+        try {
+            this.plugins.close();
+        } catch (GLib.Error err) {
+            warning("Error closing plugin manager: %s", err.message);
+        }
         this.avatars.close();
         this.pending_mailtos.clear();
         this.composer_widgets.clear();
diff --git a/src/client/application/application-plugin-manager.vala 
b/src/client/application/application-plugin-manager.vala
index 30ab8666..e052d0c0 100644
--- a/src/client/application/application-plugin-manager.vala
+++ b/src/client/application/application-plugin-manager.vala
@@ -139,4 +139,10 @@ public class Application.PluginManager : GLib.Object {
         return unloaded;
     }
 
+    internal void close() throws GLib.Error {
+        this.is_shutdown = true;
+        this.plugins.set_loaded_plugins(null);
+        this.folders_factory.destroy();
+    }
+
 }