efl_ui_focus_manager_calc: reduce the amount of list operations

it appears that the calculation of the unordered elements can be done a
lot easier here, when checking in the initial for loop for the right
parent safes us two more list walk later on.

Additionally, if all elements in this chain have the right parent, and
the amount of elements is the same as the parent has, then this list can
be used as a full replacement.

Differential Revision: https://phab.enlightenment.org/D7330

diff --git a/src/lib/elementary/efl_ui_focus_manager_calc.c b/src/lib/elementary/efl_ui_focus_manager_calc.c
index 01cb867..9dd444d 100644 (file)
--- a/src/lib/elementary/efl_ui_focus_manager_calc.c
+++ b/src/lib/elementary/efl_ui_focus_manager_calc.c
@@ -683,19 +683,21 @@ _efl_ui_focus_manager_calc_update_order(Eo *obj, Efl_Ui_Focus_Manager_Calc_Data
         tmp = eina_hash_find(pd->node_hash, &o);
 
         if (!tmp) continue;
+        if (T(tmp).parent != pnode) continue;
 
         node_order = eina_list_append(node_order, tmp);
      }
-
-   not_ordered = _set_a_without_b(T(pnode).children, node_order);
-   trash = _set_a_without_b(node_order, T(pnode).children);
-   node_order_clean = _set_a_without_b(node_order, trash);
-
-   eina_list_free(node_order);
-   eina_list_free(trash);
-
-   eina_list_free(T(pnode).children);
-   T(pnode).children = eina_list_merge(node_order_clean, not_ordered);
+   if (eina_list_count(node_order) == eina_list_count(T(pnode).children))
+     {
+        eina_list_free(T(pnode).children);
+        T(pnode).children = node_order;
+     }
+   else
+     {
+        not_ordered = _set_a_without_b(T(pnode).children, node_order);
+        eina_list_free(T(pnode).children);
+        T(pnode).children = eina_list_merge(node_order, not_ordered);
+     }
 
    return;
 }