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# Copyright (C) 2007, Eduardo Silva <edsiper@gmail.com>.
# Copyright (C) 2008, One Laptop Per Child
# Copyright (C) 2009, Ben Schwartz <bens@alum.mit.edu>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
import os
import logging
from gettext import gettext
import gtk
import dbus
from sugar.activity import activity
import os.path
import telepathy
import subprocess
import signal
SERVICE = 'org.sugarlabs.WatchMe'
IFACE = SERVICE
PATH = '/org/sugarlabs/WatchMe'
class WatchMeActivity(activity.Activity):
def __init__(self, handle):
activity.Activity.__init__(self, handle)
self._logger = logging.getLogger('watchme-activity')
self._logger.debug('Starting the WatchMe activity')
self.set_title(gettext('WatchMe Activity'))
self._vncdaemon = None
self._vncviewer = None
if not self._shared_activity: #I am the initiator
toolbox = activity.ActivityToolbox(self)
activity_toolbar = toolbox.get_activity_toolbar()
activity_toolbar.keep.props.visible = False
self.set_toolbox(toolbox)
toolbox.show()
label = gtk.Label(gettext("If you want people to be able to see everything on your screen, invite them to this activity"))
self._connected = True
# The initiator is "connected" without actually connecting to the VNC
# server, because they are looking at the X server.
self.connect('shared', self._shared_cb)
else: # I am joining
#A GUI is not created for a joiner. Hopefully, the vncviewer window
#will be the first window created by the activity, and so will get
#a working icon, etc.
label = gtk.Label(gettext("Please wait while you are connected to the shared session"))
self._connected = False
if self.get_shared(): #Already joined for some reason
self._joined_cb()
else:
self.connect('joined', self._joined_cb)
self.set_canvas(label)
self.show_all()
def _sharing_setup(self):
params = {} #could be used in the future to indicate a reflector
bundle_path = activity.get_bundle_path()
port = 5900
# Start a VNC daemon at an automatically located free TCP port,
# scaling down by a factor of 2 with no blending (for efficiency)
# allowing viewers to view only, not control the cursor or keyboard
# allowing multiple viewers to join
# continue running indefinitely
# allow connections only from localhost
self._vncdaemon = subprocess.Popen(['x11vnc', #search the PATH
'-autoport',str(port),
'-viewonly',
'-shared',
'-forever',
'-localhost'], stdout=subprocess.PIPE)
# When run with -autoport, x11vnc finds an open port, opens it, and
# prints a line of the form
# PORT=5972
# to stdout.
x = self._vncdaemon.stdout.readline()
success = 'PORT='
if x[:len(success)] == success:
port = int(x[len(success):])
logging.debug('started VNC daemon successfully on port %d' % port)
else:
self._vncdaemon.terminate()
self._vncdaemon.wait()
self._logger.error('unable to find an open port!')
self.close()
return (params, port)
def _shared_cb(self, activity):
self._logger.debug('My activity was shared')
self.initiating = True
(params, port) = self._sharing_setup()
self._logger.debug('This is my activity: making a tube...')
address = ('127.0.0.1', dbus.UInt16(port))
tubes_chan = self._shared_activity.telepathy_tubes_chan
id = tubes_chan[telepathy.CHANNEL_TYPE_TUBES].OfferStreamTube(
SERVICE, params, telepathy.SOCKET_ADDRESS_TYPE_IPV4, address,
telepathy.SOCKET_ACCESS_CONTROL_LOCALHOST, 0)
def _joined_cb(self, also_self):
tubes_chan = self._shared_activity.telepathy_tubes_chan
tubes_chan[telepathy.CHANNEL_TYPE_TUBES].connect_to_signal('NewTube',
self._new_tube_cb)
tubes_chan[telepathy.CHANNEL_TYPE_TUBES].ListTubes(
reply_handler=self._list_tubes_reply_cb,
error_handler=self._list_tubes_error_cb)
def _new_tube_cb(self, tube_id, initiator, tube_type, service, params, state):
self._logger.debug('New Tube')
if ((tube_type == telepathy.TUBE_TYPE_STREAM) and
(service == SERVICE) and (not self._connected)):
tubes_chan = self._shared_activity.telepathy_tubes_chan
iface = tubes_chan[telepathy.CHANNEL_TYPE_TUBES]
addr = iface.AcceptStreamTube(tube_id,
telepathy.SOCKET_ADDRESS_TYPE_IPV4,
telepathy.SOCKET_ACCESS_CONTROL_LOCALHOST, 0)
port = int(addr[1])
# additional properties are available from params
## Start a VNC viewer pointed at the appropriate port.
#self._vncviewer = subprocess.Popen(['/usr/bin/vncviewer',
# 'localhost::%d' % port,
# '-ViewOnly',
# '-Shared'])
import gtkvnc
vncwidget = gtkvnc.Display()
self.set_canvas(vncwidget)
vncwidget.realize() # I don't know what this does
vncwidget.open_host('localhost',str(port))
self._connected = True
self.show_all()
def can_close(self):
#if self._vncviewer is not None:
# try:
# os.kill(self._vncviewer.pid,signal.SIGTERM)
# except:
# pass
# #self._vncviewer.terminate() #requires python 2.6
if self._vncdaemon is not None:
try:
os.kill(self._vncdaemon.pid,signal.SIGTERM)
except:
pass
#self._vncdaemon.terminate() #requires python 2.6
return True
def _list_tubes_reply_cb(self, tubes):
for tube_info in tubes:
self._new_tube_cb(*tube_info)
def _list_tubes_error_cb(self, e):
self._logger.error('ListTubes() failed: %s' % e)
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