pathbar: Avoid leaking stack pages

The templates submenu in the current location popover is recreated
every time the menu model is updated, but the old widgetry is never
destroyed.

This results in a memory leak and many warnings in the terminal output.

I couldn't find the root cause, after many investigations. However,
I've found that unsetting the model actually removes the old widgetry.
Let's do that as a workaround.

Fixes https://gitlab.gnome.org/GNOME/nautilus/-/issues/1705

1 files changed, 27 insertions, 2 deletions

diff --git a/src/nautilus-pathbar.c b/src/nautilus-pathbar.c
index 68cd38639..622686b47 100644
--- a/src/nautilus-pathbar.c
+++ b/src/nautilus-pathbar.c
@@ -236,8 +236,7 @@ nautilus_path_bar_init (NautilusPathBar *self)
     self->current_view_menu = g_object_ref_sink (G_MENU (gtk_builder_get_object (builder, "background-menu")));
     self->extensions_section = g_object_ref (G_MENU (gtk_builder_get_object (builder, "background-extensions-section")));
     self->templates_submenu = g_object_ref (G_MENU (gtk_builder_get_object (builder, "templates-submenu")));
-    self->current_view_menu_popover = g_object_ref_sink (GTK_POPOVER (gtk_popover_new_from_model (NULL,
-                                                                                                  G_MENU_MODEL (self->current_view_menu))));
+    self->current_view_menu_popover = g_object_ref_sink (GTK_POPOVER (gtk_popover_new (NULL)));
 
     g_object_unref (builder);
 
@@ -946,6 +945,16 @@ nautilus_path_bar_set_templates_menu (NautilusPathBar *self,
 {
     g_return_if_fail (NAUTILUS_IS_PATH_BAR (self));
 
+    if (!gtk_widget_is_visible (GTK_WIDGET (self->current_view_menu_popover)))
+    {
+        /* Workaround to avoid leaking duplicated GtkStack pages each time the
+         * templates menu is set. Unbinding the model is the only way to clear
+         * all children. For that reason, we need to rebind the popover before
+         * it is shown again.
+         * See https://gitlab.gnome.org/GNOME/nautilus/-/issues/1705 */
+        gtk_popover_bind_model (self->current_view_menu_popover, NULL, NULL);
+    }
+
     nautilus_gmenu_set_from_model (self->templates_submenu, menu);
 }
 
@@ -1042,6 +1051,14 @@ button_clicked_cb (GtkButton *button,
     {
         if (g_file_equal (button_data->path, self->current_path))
         {
+            /* Workaround to avoid leaking duplicated GtkStack pages each time the
+             * templates menu is set. Unbinding the model is the only way to clear
+             * all children. For that reason, we need to rebind the popover before
+             * it is shown again.
+             * See https://gitlab.gnome.org/GNOME/nautilus/-/issues/1705 */
+            gtk_popover_bind_model (self->current_view_menu_popover,
+                                    G_MENU_MODEL (self->current_view_menu),
+                                    NULL);
             gtk_popover_popup (self->current_view_menu_popover);
         }
         else
@@ -1169,6 +1186,14 @@ on_multi_press_gesture_pressed (GtkGestureMultiPress *gesture,
         {
             if (g_file_equal (button_data->path, self->current_path))
             {
+                /* Workaround to avoid leaking duplicated GtkStack pages each time the
+                 * templates menu is set. Unbinding the model is the only way to clear
+                 * all children. For that reason, we need to rebind the popover before
+                 * it is shown again.
+                 * See https://gitlab.gnome.org/GNOME/nautilus/-/issues/1705 */
+                gtk_popover_bind_model (self->current_view_menu_popover,
+                                        G_MENU_MODEL (self->current_view_menu),
+                                        NULL);
                 gtk_popover_popup (self->current_view_menu_popover);
             }
             else