Few small improvements for spotify widget

spotify-widget/spotify.lua

@@ -4,7 +4,6 @@ local watch = require("awful.widget.watch")
 
 spotify_widget = wibox.widget.textbox()
 spotify_widget:set_font('Play 9')
-spotify_widget:connect_signal("button::release", function() awful.spawn('sp play'); end)
 
 -- optional icon, could be replaced by spotfiy logo (https://developer.spotify.com/design/)
 spotify_icon = wibox.widget.imagebox()
@@ -12,11 +11,16 @@ spotify_icon:set_image("/usr/share/icons/Arc/devices/22/audio-headphones.png")
 
 watch(
     "sp current-oneline", 1,
-    function(widget, stdout, stderr, exitreason, exitcode)
-        spotify_widget:set_text(stdout)
-    end
+    function(widget, stdout, _, _, _)
+        if string.find(stdout, 'Error: Spotify is not running.') ~= nil then
+            widget:set_text("")
+        else
+            widget:set_text(stdout)
+        end
+    end,
+    spotify_widget
 )
 
 spotify_widget:connect_signal("button::press", function(_,_,_,button)
     if (button == 1) then awful.spawn("sp play", false) end
-end)
+end)