[nautilus/wip/antoniof/tag-manager-cleanup: 2/3] Revert "search: Remove special characters from FTS searches"

[António Fernandes <antoniof src gnome org>]

commit 0296c0b412326cde480fe1d982e0e6c63561ed48
Author: António Fernandes <antoniof gnome org>
Date:   Mon Dec 21 11:04:18 2020 +0000

    Revert "search: Remove special characters from FTS searches"
    
    This reverts commit e3031953e40b4fe067d566ac6c403127d7b6c266
    
    It worked around an issue in tracker, which is fixed now:
    https://gitlab.gnome.org/GNOME/tracker/-/issues/252

 src/nautilus-search-engine-tracker.c | 30 +-----------------------------
 1 file changed, 1 insertion(+), 29 deletions(-)
---
diff --git a/src/nautilus-search-engine-tracker.c b/src/nautilus-search-engine-tracker.c
index 9ebac0b28..6ba9446a6 100644
--- a/src/nautilus-search-engine-tracker.c
+++ b/src/nautilus-search-engine-tracker.c
@@ -294,31 +294,6 @@ search_finished_idle (gpointer user_data)
  */
 #define FILENAME_RANK "5.0"
 
-static gchar *
-filter_alnum_strdup (gchar *string)
-{
-    GString *filtered;
-    gchar *c;
-
-    filtered = g_string_new ("");
-    for (c = string; *c; c = g_utf8_next_char (c))
-    {
-        gunichar uc;
-
-        uc = g_utf8_get_char (c);
-        if (g_unichar_isalnum (uc))
-        {
-            g_string_append_unichar (filtered, uc);
-        }
-        else
-        {
-            g_string_append_c (filtered, ' ');
-        }
-    }
-
-    return g_string_free (filtered, FALSE);
-}
-
 static void
 nautilus_search_engine_tracker_start (NautilusSearchProvider *provider)
 {
@@ -396,16 +371,13 @@ nautilus_search_engine_tracker_start (NautilusSearchProvider *provider)
     if (tracker->fts_enabled && *search_text)
     {
         /* Use fts:match only for content search to not lose some filename results due to stop words. */
-        g_autofree gchar *filtered_search_text;
-
-        filtered_search_text = filter_alnum_strdup (search_text);
         g_string_append_printf (sparql,
                                 " { "
                                 " ?content nie:isStoredAs ?file ."
                                 " ?content fts:match \"%s*\" ."
                                 " BIND(fts:rank(?content) AS ?rank1) ."
                                 " } UNION",
-                                filtered_search_text);
+                                search_text);
     }
 
     g_string_append_printf (sparql,