[gtk/wip/antoniof/popover_remove_submenus_recursively] menusectionbox: Remove submenus recursively

[António Fernandes <antoniof src gnome org>]

commit a736ae82a72fd6485cc685759015201d4c9e9caf
Author: António Fernandes <antoniof gnome org>
Date:   Sun Dec 20 22:26:44 2020 +0000

    menusectionbox: Remove submenus recursively
    
    When a submenu link is removed in the menu model, the remove_func
    callback removes the submenu's page from the stack. But the submenu
    may contain links to other submenus. Let's remove them as well.
    
    Fixes https://gitlab.gnome.org/GNOME/nautilus/-/issues/1705

 gtk/gtkmenusectionbox.c | 37 +++++++++++++++++++++++++++++++++----
 1 file changed, 33 insertions(+), 4 deletions(-)
---
diff --git a/gtk/gtkmenusectionbox.c b/gtk/gtkmenusectionbox.c
index b790825a64..c9666dc531 100644
--- a/gtk/gtkmenusectionbox.c
+++ b/gtk/gtkmenusectionbox.c
@@ -190,6 +190,35 @@ gtk_popover_item_activate (GtkWidget *button,
     }
 }
 
+static void
+remove_submenu_tree_from_stack (const char *submenu_name,
+                                GtkStack   *stack)
+{
+  GtkWidget *submenu;
+  GtkBox *item_box;
+  GList *children, *l;
+
+  submenu = gtk_stack_get_child_by_name (stack, submenu_name);
+  if (submenu == NULL)
+    return;
+
+  item_box = GTK_MENU_SECTION_BOX (submenu)->item_box;
+  children = gtk_container_get_children (GTK_CONTAINER (item_box));
+  for (l = children; l != NULL; l = l->next)
+    {
+      GtkMenuTrackerItem *item;
+
+      item = g_object_get_data (G_OBJECT (l->data), "GtkMenuTrackerItem");
+
+      if (gtk_menu_tracker_item_get_has_link (item, G_MENU_LINK_SUBMENU))
+        remove_submenu_tree_from_stack (gtk_menu_tracker_item_get_label (item),
+                                        stack);
+    }
+  g_list_free (children);
+
+  gtk_container_remove (GTK_CONTAINER (stack), submenu);
+}
+
 static void
 gtk_menu_section_box_remove_func (gint     position,
                                   gpointer user_data)
@@ -206,12 +235,12 @@ gtk_menu_section_box_remove_func (gint     position,
   item = g_object_get_data (G_OBJECT (widget), "GtkMenuTrackerItem");
   if (gtk_menu_tracker_item_get_has_link (item, G_MENU_LINK_SUBMENU))
     {
-      GtkWidget *stack, *subbox;
+      GtkWidget *stack;
 
       stack = gtk_widget_get_ancestor (GTK_WIDGET (box->toplevel), GTK_TYPE_STACK);
-      subbox = gtk_stack_get_child_by_name (GTK_STACK (stack), gtk_menu_tracker_item_get_label (item));
-      if (subbox != NULL)
-        gtk_container_remove (GTK_CONTAINER (stack), subbox);
+
+      remove_submenu_tree_from_stack (gtk_menu_tracker_item_get_label (item),
+                                      GTK_STACK (stack));
     }
 
   gtk_widget_destroy (g_list_nth_data (children, position));