[gedit/gnome-3-30] document selector: make search caseless

[Sébastien Lafargue <slafargue src gnome org>]

commit a622fda63726adaabd02fa0c1786b75a921b1973
Author: Sebastien Lafargue <slafargue gnome org>
Date:   Mon Nov 19 19:46:56 2018 +0100

    document selector: make search caseless

 gedit/gedit-open-document-selector.c | 36 ++++++++++++++++++++++++++++++------
 1 file changed, 30 insertions(+), 6 deletions(-)
---
diff --git a/gedit/gedit-open-document-selector.c b/gedit/gedit-open-document-selector.c
index 5389ef0bd..3e3d9a293 100644
--- a/gedit/gedit-open-document-selector.c
+++ b/gedit/gedit-open-document-selector.c
@@ -436,6 +436,23 @@ fileitem_setup (FileItem *item)
        return candidate;
 }
 
+static inline gboolean
+is_filter_in_candidate (const gchar *candidate,
+                        const gchar *filter)
+{
+       gchar *candidate_fold;
+       gboolean ret;
+
+       g_assert (candidate != NULL);
+       g_assert (filter != NULL);
+
+       candidate_fold = g_utf8_casefold (candidate, -1);
+       ret = (strstr (candidate_fold, filter) != NULL);
+
+       g_free (candidate_fold);
+       return ret;
+}
+
 /* If filter == NULL then items are
  * not checked against the filter.
  */
@@ -445,6 +462,10 @@ fileitem_list_filter (GList       *items,
 {
        GList *new_items = NULL;
        GList *l;
+       gchar *filter_fold = NULL;
+
+       if (filter != NULL)
+               filter_fold = g_utf8_casefold (filter, -1);
 
        for (l = items; l != NULL; l = l->next)
        {
@@ -453,16 +474,19 @@ fileitem_list_filter (GList       *items,
 
                item = l->data;
                candidate = fileitem_setup (item);
-
-               if (candidate && (filter ==  NULL || strstr (candidate, filter)))
+               if (candidate != NULL)
                {
-                       new_items = g_list_prepend (new_items,
-                                                   gedit_open_document_selector_copy_fileitem_item (item));
-               }
+                       if (filter == NULL || is_filter_in_candidate (candidate, filter_fold))
+                       {
+                               new_items = g_list_prepend (new_items,
+                                                           gedit_open_document_selector_copy_fileitem_item 
(item));
+                       }
 
-               g_free (candidate);
+                       g_free (candidate);
+               }
        }
 
+       g_free (filter_fold);
        new_items = g_list_reverse (new_items);
        return new_items;
 }