[gnome-builder] libide-gui: track plugin enabled changes via gsettings

[Christian Hergert <chergert src gnome org>]

commit 42417d6862695bea80f7c985eed8bd737e65efc7
Author: Günther Wagner <info gunibert de>
Date:   Fri May 8 22:16:52 2020 +0200

    libide-gui: track plugin enabled changes via gsettings
    
    This fixes the loading and unloading of plugins via the "Extensions"
    section of the preferences window.
    
    The previous functionality was lost during the refactor of Builder
    for 3.34.
    
    Fixes #1193

 src/libide/gui/ide-application-plugins.c | 37 +++++++++++++++++++++++++++++---
 1 file changed, 34 insertions(+), 3 deletions(-)
---
diff --git a/src/libide/gui/ide-application-plugins.c b/src/libide/gui/ide-application-plugins.c
index 9cdbe63f2..a543b040f 100644
--- a/src/libide/gui/ide-application-plugins.c
+++ b/src/libide/gui/ide-application-plugins.c
@@ -28,15 +28,41 @@
 #include "ide-application-addin.h"
 #include "ide-application-private.h"
 
+static void
+ide_application_changed_plugin_cb (GSettings      *settings,
+                                   const gchar    *key,
+                                   PeasPluginInfo *plugin_info)
+{
+  PeasEngine *engine;
+
+  IDE_ENTRY;
+
+  g_assert (G_IS_SETTINGS (settings));
+  g_assert (key != NULL);
+  g_assert (plugin_info != NULL);
+
+  engine = peas_engine_get_default ();
+
+  if (!g_settings_get_boolean (settings, key))
+    peas_engine_unload_plugin (engine, plugin_info);
+  else
+    peas_engine_load_plugin (engine, plugin_info);
+
+  IDE_EXIT;
+}
+
 static GSettings *
 _ide_application_plugin_get_settings (IdeApplication *self,
-                                      const gchar    *module_name)
+                                      PeasPluginInfo *plugin_info)
 {
   GSettings *settings;
+  const gchar *module_name;
 
   g_assert (IDE_IS_MAIN_THREAD ());
   g_assert (IDE_IS_APPLICATION (self));
-  g_assert (module_name != NULL);
+  g_assert (plugin_info != NULL);
+
+  module_name = peas_plugin_info_get_module_name (plugin_info);
 
   if G_UNLIKELY (self->plugin_settings == NULL)
     self->plugin_settings =
@@ -49,6 +75,11 @@ _ide_application_plugin_get_settings (IdeApplication *self,
       path = g_strdup_printf ("/org/gnome/builder/plugins/%s/", module_name);
       settings = g_settings_new_with_path ("org.gnome.builder.plugin", path);
       g_hash_table_insert (self->plugin_settings, g_strdup (module_name), settings);
+
+      g_signal_connect (settings,
+                        "changed::enabled",
+                        G_CALLBACK (ide_application_changed_plugin_cb),
+                        plugin_info);
     }
 
   return settings;
@@ -88,7 +119,7 @@ ide_application_can_load_plugin (IdeApplication *self,
   g_hash_table_add (circular, (gpointer)module_name);
 
   /* Make sure the plugin has not been disabled in settings. */
-  settings = _ide_application_plugin_get_settings (self, module_name);
+  settings = _ide_application_plugin_get_settings (self, plugin_info);
   if (!g_settings_get_boolean (settings, "enabled"))
     return FALSE;