Merge pull request #782 from S0lll0s/feature/i3

Add i3 bindings, segments and renderer

docs/source/overview.rst

@@ -73,6 +73,7 @@ Python packages
 * ``pygit2``
 * ``mercurial``
 * ``psutil``
+* ``i3-py``, `available on github <https://github.com/ziberna/i3-py>`_. Only used with i3wm bindings and segments.
 
 Other applications
 ^^^^^^^^^^^^^^^^^^
@@ -233,3 +234,19 @@ Add the following to your :file:`~/.config/qtile/config.py`:
            ),
        ),
    ]
+
+with i3bar replacement
+-----------------
+
+.. note:: Until the patch is done in i3, you will need a custom ``i3bar`` build called ``i3bgbar``.
+    The source is available `here <https://github.com/S0lll0s/i3bgbar>`_.
+
+Add the following to your :file:`~/.i3/config`::
+    bar {
+        i3bar_command i3bgbar
+
+        status_command python /path/to/powerline/bindings/i3/powerline-i3.py
+        font pango:PowerlineFont 12
+    }
+
+where ``i3bgbar`` may be replaced with the path to the custom i3bar binary and ``PowerlineFont`` is any system font with powerline support.

powerline/bindings/i3/powerline-i3.py

@@ -0,0 +1,40 @@
+#!/usr/bin/env python
+# vim:fileencoding=utf-8:noet
+from __future__ import print_function
+
+from powerline import Powerline
+from powerline.lib.monotonic import monotonic
+
+import sys
+import time
+import i3
+from threading import Lock
+
+name = 'wm'
+if len( sys.argv ) > 1:
+	name = sys.argv[1]
+powerline = Powerline(name, renderer_module='i3bgbar')
+powerline.update_renderer()
+
+interval = 0.5
+
+print( '{"version": 1, "custom_workspace": true}' )
+print( '[' )
+print( '	[[],[]]' )
+
+lock = Lock()
+
+def render( event=None, data=None, sub=None ):
+	global lock
+	with lock:
+		s  = '[\n' + powerline.render(side='right')[:-2] + '\n]\n'
+		s += ',[\n' + powerline.render(side='left' )[:-2] + '\n]'
+		print( ',[\n' + s + '\n]' )
+		sys.stdout.flush()
+
+sub = i3.Subscription( render, 'workspace' )
+
+while True:
+	start_time = monotonic()
+	render()
+	time.sleep(max(interval - (monotonic() - start_time), 0.1))

powerline/renderers/i3bgbar.py

@@ -0,0 +1,29 @@
+# vim:fileencoding=utf-8:noet
+
+from powerline.renderer import Renderer
+from powerline.colorscheme import ATTR_BOLD, ATTR_ITALIC, ATTR_UNDERLINE
+import json
+
+class i3bgbarRenderer(Renderer):
+	'''i3bgbar Segment Renderer'''
+
+	@staticmethod
+	def hlstyle(*args, **kwargs):
+		# We don't need to explicitly reset attributes, so skip those calls
+		return ''
+
+	def hl(self, contents, fg=None, bg=None, attr=None):
+		'''Highlight a segment.'''
+
+		segment = { "full_text": contents, "separator": False, "separator_block_width": 0 } # no seperators
+
+		if fg is not None:
+			if fg is not False and fg[1] is not False:
+				segment['color'] = "#{0:06x}".format(fg[1])
+		if bg is not None:
+			if bg is not False and bg[1] is not False:
+				segment['background_color'] = "#{0:06x}".format(bg[1])
+		return json.dumps( segment ) + ",\n" # i3bar "pseudo json" requires one line at a time
+
+
+renderer = i3bgbarRenderer

powerline/segments/i3wm.py

@@ -0,0 +1,19 @@
+# vim:fileencoding=utf-8:noet
+
+from powerline.theme import requires_segment_info
+import i3
+
+def calcgrp( w ):
+	group = []
+	if w['focused']: group.append( 'w_focused' )
+	if w['urgent']: group.append( 'w_urgent' )
+	if w['visible']: group.append( 'w_visible' )
+	group.append( 'workspace' )
+	return group
+
+def workspaces( pl ):
+	'''Return workspace list
+
+	Highlight groups used: ``workspace``, ``w_visible``, ``w_focused``, ``w_urgent``
+	'''
+	return [ {'contents': w['name'], 'highlight_group': calcgrp( w )} for w in i3.get_workspaces() ]