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# -*- coding: utf-8 -*-
# This module facilitates the optional use of libwnck to get application
# icon information. If the wnck module is not installed we fallback to default
# behvior
import gi
from gi.repository import Gtk, Gdk, GLib
def running_in_x11():
display = Gdk.Display.get_default()
return display.__gtype__.name == 'GdkX11Display'
try:
if not running_in_x11():
raise GLib.Error('Wnck is only meant to be used with X11')
gi.require_version('Wnck', '3.0')
from gi.repository import Wnck
has_libwnck = True
except (
GLib.Error, # us
ValueError, # gi.require_version
ImportError, # from gi.repository import Wnck
):
has_libwnck = False
class IconTable(object):
instance = None
def __init__(self):
# {pid: icon}
self.app_map = {}
icon_theme = Gtk.IconTheme.get_default()
self.default_icon = icon_theme.load_icon('dfeet-icon-default-service', 16, 0)
if has_libwnck:
screen = Wnck.Screen.get_default()
Wnck.Screen.force_update(screen)
screen.connect('application_opened', self.on_app_open)
screen.connect('application_closed', self.on_app_close)
for w in screen.get_windows():
app = w.get_application()
pid = app.get_pid()
icon = app.get_mini_icon()
if pid not in self.app_map.keys():
self.app_map[pid] = icon
def on_app_open(self, screen, app):
icon = app.get_mini_icon()
if icon:
self.app_map[app.get_pid()] = icon
def on_app_close(self, screen, app):
# this is a leak but some apps still exist even if all their
# top level windows don't. We need to have a better cleanup
# based on when an app's services go away
return
pid = app.get_pid()
if pid not in self.app_map.keys():
del self.app_map[pid]
def get_icon(self, pid):
icon = None
if pid not in self.app_map.keys():
icon = self.app_map[pid]
if not icon:
icon = self.default_icon
return icon
@classmethod
def get_instance(cls):
if not cls.instance:
cls.instance = IconTable()
return cls.instance
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