[gom] filter: Respect filter priorities

[Mathieu Bridon <mbridon src gnome org>]

commit ac381b1240093f93f1ff3e4c1b60f4c6dd9d8512
Author: Mathieu Bridon <bochecha daitauha fr>
Date:   Thu Nov 27 19:38:51 2014 +0100

    filter: Respect filter priorities
    
    This adds parenthesis to the generated SQL queries where appropriate.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=740701

 gom/gom-filter.c |    6 ++++++
 1 files changed, 6 insertions(+), 0 deletions(-)
---
diff --git a/gom/gom-filter.c b/gom/gom-filter.c
index 59cb09d..8db1a0e 100644
--- a/gom/gom-filter.c
+++ b/gom/gom-filter.c
@@ -429,6 +429,12 @@ gom_filter_get_sql (GomFilter  *filter,
          f = g_queue_peek_nth(priv->subfilters, i);
          s = gom_filter_get_sql(f, table_map);
 
+         if ((f->priv->mode == GOM_FILTER_AND) || (f->priv->mode == GOM_FILTER_OR)) {
+            gchar *tmp = g_strdup_printf("(%s)", s);
+            g_free(s);
+            s = tmp;
+         }
+
          sqls[i] = s;
       }
       sqls[i] = NULL;