[gnome-music/wip/jfelder/mpris-seek: 4/4] mpris: Limit Seeked signal emissions

[Jean Felder <jfelder src gnome org>]

commit 8d56e7f8624f63ec4edbfbda71f13cc32496cb48
Author: Jean Felder <jfelder src gnome org>
Date:   Tue Apr 16 16:15:53 2019 +0200

    mpris: Limit Seeked signal emissions
    
    Related: #43

 gnomemusic/mpris.py | 8 ++++++++
 1 file changed, 8 insertions(+)
---
diff --git a/gnomemusic/mpris.py b/gnomemusic/mpris.py
index ccc7c89a..f98265fb 100644
--- a/gnomemusic/mpris.py
+++ b/gnomemusic/mpris.py
@@ -240,6 +240,7 @@ class MediaPlayer2Service(Server):
         self._path_list = []
         self._metadata_list = []
         self._previous_playback_status = "Stopped"
+        self._song_position = 0
 
     @log
     def _get_playback_status(self):
@@ -609,6 +610,13 @@ class MediaPlayer2Service(Server):
 
         :param int position_msecond: new position in microseconds.
         """
+        # Only send the signal when the position has changed in a way
+        # that is inconsistant with the current playing state
+        if abs(position_msecond - self._song_position) < 2e6:
+            self._song_position = position_msecond
+            return
+
+        self._song_position = position_msecond
         variant = GLib.Variant.new_tuple(GLib.Variant('x', position_msecond))
         self.con.emit_signal(
             None, '/org/mpris/MediaPlayer2',