/usr/share/sugar/activities/Browse.activity/messenger.py is in sugar-browse-activity-0.86 120-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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# Copyright (C) 2007, One Laptop Per Child
#
# 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., 675 Mass Ave, Cambridge, MA 02139, USA.
#
import logging
import dbus
from dbus.gobject_service import ExportedGObject
import base64
SERVICE = "org.laptop.WebActivity"
IFACE = SERVICE
PATH = "/org/laptop/WebActivity"
_logger = logging.getLogger('messenger')
class Messenger(ExportedGObject):
def __init__(self, tube, is_initiator, model):
ExportedGObject.__init__(self, tube, PATH)
self.tube = tube
self.is_initiator = is_initiator
self.members = []
self.entered = False
self.model = model
self.bus_name = None
self.tube.watch_participants(self.participant_change_cb)
def participant_change_cb(self, added, removed):
_logger.debug('Participants change add=%s rem=%s'
%(added, removed))
for handle, bus_name in added:
_logger.debug('Add member handle=%s bus_name=%s'
%(str(handle), str(bus_name)))
self.members.append(bus_name)
for handle in removed:
_logger.debug('Remove member %r', handle)
try:
self.members.remove(self.tube.participants[handle])
except ValueError:
_logger.debug('Remove member %r - already absent', handle)
if not self.entered:
self.tube.add_signal_receiver(self._add_link_receiver, '_add_link',
IFACE, path=PATH,
sender_keyword='sender',
byte_arrays=True)
self.bus_name = self.tube.get_unique_name()
if self.is_initiator:
_logger.debug('Initialising a new shared browser, I am %s .'
%self.tube.get_unique_name())
else:
# sync with other members
_logger.debug('Joined I am %s .'%self.bus_name)
for member in self.members:
if member != self.bus_name:
_logger.debug('Get info from %s' %member)
self.tube.get_object(member, PATH).sync_with_members(
self.model.get_links_ids(), dbus_interface=IFACE,
reply_handler=self.reply_sync, error_handler=lambda
e:self.error_sync(e, 'transfering file'))
self.entered = True
def reply_sync(self, a_ids, sender):
a_ids.pop()
for link in self.model.data['shared_links']:
if link['hash'] not in a_ids:
self.tube.get_object(sender, PATH).send_link(
link['hash'], link['url'], link['title'], link['color'],
link['owner'], link['thumb'], link['timestamp'])
def error_sync(self, e, when):
_logger.error('Error %s: %s'%(when, e))
@dbus.service.method(dbus_interface=IFACE, in_signature='as',
out_signature='ass', sender_keyword='sender')
def sync_with_members(self, b_ids, sender=None):
'''Sync with members '''
b_ids.pop()
# links the caller wants from me
for link in self.model.data['shared_links']:
if link['hash'] not in b_ids:
self.tube.get_object(sender, PATH).send_link(
link['hash'], link['url'], link['title'], link['color'],
link['owner'], link['thumb'], link['timestamp'])
a_ids = self.model.get_links_ids()
a_ids.append('')
# links I want from the caller
return (a_ids, self.bus_name)
@dbus.service.method(dbus_interface=IFACE, in_signature='ssssssd',
out_signature='')
def send_link(self, identifier, url, title, color, owner, buf, timestamp):
'''Send link'''
a_ids = self.model.get_links_ids()
if identifier not in a_ids:
thumb = base64.b64decode(buf)
self.model.add_link(url, title, thumb, owner, color, timestamp)
@dbus.service.signal(IFACE, signature='sssssd')
def _add_link(self, url, title, color, owner, thumb, timestamp):
'''Signal to send the link information (add)'''
_logger.debug('Add Link: %s '%url)
def _add_link_receiver(self, url, title, color, owner, buf, timestamp,
sender=None):
'''Member sent a link'''
handle = self.tube.bus_name_to_handle[sender]
if self.tube.self_handle != handle:
thumb = base64.b64decode(buf)
self.model.add_link(url, title, thumb, owner, color, timestamp)
_logger.debug('Added link: %s to linkbar.'%(url))
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