[tracker] libtracker-miner: Do not insert RootData for the same file multiple times

[Carlos Garnacho <carlosg src gnome org>]

commit bf8d1f7cd3d1c6355024e885fcf6c962c6046f3a
Author: Carlos Garnacho <carlosg gnome org>
Date:   Tue May 3 00:22:46 2016 +0200

    libtracker-miner: Do not insert RootData for the same file multiple times
    
    If the file is already there, there is no need to crawl/recheck it
    several times.

 src/libtracker-miner/tracker-file-notifier.c |   26 +++++++++++++++++---------
 1 files changed, 17 insertions(+), 9 deletions(-)
---
diff --git a/src/libtracker-miner/tracker-file-notifier.c b/src/libtracker-miner/tracker-file-notifier.c
index e9f2ef9..69d32b6 100644
--- a/src/libtracker-miner/tracker-file-notifier.c
+++ b/src/libtracker-miner/tracker-file-notifier.c
@@ -1035,6 +1035,15 @@ crawler_finished_cb (TrackerCrawler *crawler,
        }
 }
 
+static gint
+find_directory_root (RootData *data,
+                     GFile    *file)
+{
+       if (data->root == file)
+               return 0;
+       return -1;
+}
+
 static void
 notifier_queue_file (TrackerFileNotifier   *notifier,
                      GFile                 *file,
@@ -1043,6 +1052,14 @@ notifier_queue_file (TrackerFileNotifier   *notifier,
        TrackerFileNotifierPrivate *priv = notifier->priv;
        RootData *data = root_data_new (notifier, file, flags);
 
+       if (priv->current_index_root &&
+           priv->current_index_root->root == file)
+               return;
+
+       if (g_list_find_custom (priv->pending_index_roots, file,
+                               (GCompareFunc) find_directory_root))
+               return;
+
        if (flags & TRACKER_DIRECTORY_FLAG_PRIORITY) {
                priv->pending_index_roots = g_list_prepend (priv->pending_index_roots, data);
        } else {
@@ -1417,15 +1434,6 @@ indexing_tree_directory_added (TrackerIndexingTree *indexing_tree,
        crawl_directories_start (notifier);
 }
 
-static gint
-find_directory_root (RootData *data,
-                     GFile    *file)
-{
-       if (data->root == file)
-               return 0;
-       return -1;
-}
-
 static void
 indexing_tree_directory_removed (TrackerIndexingTree *indexing_tree,
                                  GFile               *directory,