[gtk/wip/carlosg/tracker3: 4/5] gtksearchenginetracker3: Pre-fill GFileInfo from query

[Carlos Garnacho <carlosg src gnome org>]

commit edf6f9e108a3375f386679c25e872d95aa449a8b
Author: Carlos Garnacho <carlosg gnome org>
Date:   Tue May 19 13:55:41 2020 +0200

    gtksearchenginetracker3: Pre-fill GFileInfo from query
    
    Provide the minimal info necessary. Improves apparent responsiveness
    (since we don't visibly clear and repopulate the list) and saves doing
    file stat/reads on every file in the result set.

 gtk/gtksearchenginetracker3.c | 35 +++++++++++++++++++++++++++++++++++
 1 file changed, 35 insertions(+)
---
diff --git a/gtk/gtksearchenginetracker3.c b/gtk/gtksearchenginetracker3.c
index 1debfc24ca..aa50a0dd12 100644
--- a/gtk/gtksearchenginetracker3.c
+++ b/gtk/gtksearchenginetracker3.c
@@ -38,6 +38,10 @@
 
 #define SEARCH_QUERY_BASE(__PATTERN__)                                 \
   "SELECT ?url "                                                       \
+  "       nfo:fileName(?urn) "                                        \
+  "       nie:mimeType(?urn)"                                         \
+  "       nfo:fileSize(?urn)"                                         \
+  "       nfo:fileLastModified(?urn)"                                 \
   "FROM tracker:FileSystem "                                           \
   "WHERE {"                                                            \
   "  ?urn a nfo:FileDataObject ;"                                      \
@@ -109,6 +113,36 @@ free_hit (gpointer data)
   g_slice_free (GtkSearchHit, hit);
 }
 
+static GFileInfo *
+create_file_info (TrackerSparqlCursor *cursor)
+{
+  GFileInfo *info;
+  const gchar *str;
+  GDateTime *creation;
+
+  info = g_file_info_new ();
+  str = tracker_sparql_cursor_get_string (cursor, 1, NULL);
+  if (str)
+    g_file_info_set_display_name (info, str);
+
+  str = tracker_sparql_cursor_get_string (cursor, 2, NULL);
+  if (str)
+    g_file_info_set_content_type (info, str);
+
+  g_file_info_set_size (info,
+                        tracker_sparql_cursor_get_integer (cursor, 3));
+
+  str = tracker_sparql_cursor_get_string (cursor, 4, NULL);
+  if (str)
+    {
+      creation = g_date_time_new_from_iso8601 (str, NULL);
+      g_file_info_set_modification_date_time (info, creation);
+      g_date_time_unref (creation);
+    }
+
+  return info;
+}
+
 static void
 query_callback (TrackerSparqlStatement *statement,
                 GAsyncResult           *res,
@@ -141,6 +175,7 @@ query_callback (TrackerSparqlStatement *statement,
       url = tracker_sparql_cursor_get_string (cursor, 0, NULL);
       hit = g_slice_new0 (GtkSearchHit);
       hit->file = g_file_new_for_uri (url);
+      hit->info = create_file_info (cursor);
       hits = g_list_prepend (hits, hit);
     }