lemonbar: Implement modular approach for conky slow and conky fast

.i3/lemonbar/i3_lemonbar_common.py

@@ -1,4 +1,5 @@
 import subprocess, os, getpass
+import re # regexp
 from enum import Enum
 
 import i3_lemonbar_config as config
@@ -97,8 +98,16 @@ commands_dict = {'toggle_secs': toggle_secs
                 ,'bluetooth': bluetooth
                 }
 
+# Helper functions
+ansi_escape = re.compile(r'(\x9B|\x1B\[)[0-?]*[ -/]*[@-~]')
+def strip_ansi_unicode(s):
+    # ANSI escape sequences are for colors in terminal and similar
+    strip_ansi = ansi_escape.sub('', s)
+    strip_unicode = (strip_ansi.encode('ascii', 'ignore')).decode('utf-8')
+    return strip_unicode
+
 # Callbacks for workspaces
-def add_callbacks(i3ws):
+def add_callbacks(i3ws): #TODO this should be done by module
     i3ws.change_callbacks.append(set_bg)
     i3ws.focus_callbacks.append(set_keymap)
     i3ws.focus_callbacks.append(kill_floating_windows)