(Optionally) switch from "i3-py" to "i3ipc" for i3 bindings

i3-py is no longer maintained

powerline/bindings/bar/powerline-bar.py

@@ -5,7 +5,7 @@ from __future__ import (unicode_literals, division, absolute_import, print_funct
 import sys
 import time
 
-from threading import Lock
+from threading import Lock, Timer
 from argparse import ArgumentParser
 
 from powerline import Powerline
@@ -20,14 +20,16 @@ class BarPowerline(Powerline):
 		super(BarPowerline, self).init(ext='wm', renderer_module='bar')
 
 
-def render(event=None, data=None, sub=None):
+def render(reschedule=False):
+	if reschedule:
+		Timer(0.5, render, kwargs={"reschedule": True}).start()
+
 	global lock
 	with lock:
 		write(powerline.render())
 		write('\n')
 		sys.stdout.flush()
 
-
 if __name__ == '__main__':
 	parser = ArgumentParser(description='Powerline BAR bindings.')
 	parser.add_argument(
@@ -37,16 +39,19 @@ if __name__ == '__main__':
 	args = parser.parse_args()
 	powerline = BarPowerline()
 
-	interval = 0.5
 	lock = Lock()
 
 	write = get_unicode_writer(encoding='utf-8')
+	render(reschedule=True)
 
 	if args.i3:
+		try:
+			import i3ipc
+			conn = i3ipc.Connection()
+			conn.on('workspace::focus', lambda conn, evt: render())
+			conn.main()
+		except ImportError:
 			import i3
-		sub = i3.Subscription(render, 'workspace')
+			i3.Subscription(lambda evt, data, sub: print(render()), 'workspace')
 
-	while True:
+	while True: pass
-		start_time = monotonic()
-		render()
-		time.sleep(max(interval - (monotonic() - start_time), 0.1))

powerline/segments/i3wm.py

@@ -1,7 +1,11 @@
 # vim:fileencoding=utf-8:noet
 from __future__ import (unicode_literals, division, absolute_import, print_function)
 
-import i3
+conn = None
+try:
+    import i3ipc
+except ImportError:
+    import i3 as conn
 
 
 def calcgrp(w):
@@ -16,12 +20,19 @@ def calcgrp(w):
 	return group
 
 
-def workspaces(pl):
+def workspaces(pl, strip=0):
-	'''Return workspace list
+	'''Return list of used workspaces
+
+	:param int strip:
+		Specifies how many characters from the front of each workspace name should
+		be stripped (e.g. to remove workspace numbers). Defaults to zero.
 
 	Highlight groups used: ``workspace``, ``w_visible``, ``w_focused``, ``w_urgent``
 	'''
+	global conn
+	if not conn: conn = i3ipc.Connection()
+
 	return [{
-		'contents': w['name'],
+		'contents': w['name'][min(len(w['name']),strip):],
 		'highlight_groups': calcgrp(w)
-	} for w in i3.get_workspaces()]
+	} for w in conn.get_workspaces()]