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# Copyright (C) 2006, Red Hat, Inc.
#
# 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 gtk
import gobject
import os
import logging
from sugar.p2p import MostlyReliablePipe
from sugar.p2p.Stream import Stream
from sugar.presence import PresenceService
from sugar.activity.Activity import Activity
from sugar.chat.sketchpad import SketchPad
from sugar.chat.sketchpad import Sketch
from sugar.graphics.iconcolor import IconColor
from sugar import profile
class NetworkController(gobject.GObject):
__gsignals__ = {
'new-path':(gobject.SIGNAL_RUN_FIRST, gobject.TYPE_NONE,
([gobject.TYPE_PYOBJECT, gobject.TYPE_PYOBJECT])),
}
def __init__(self, parent, ps_owner):
gobject.GObject.__init__(self)
self._parent = parent
self._parent.connect('buddy-joined', self._buddy_joined)
self._parent.connect('buddy-left', self._buddy_left)
self._stream = None
self._stream_writer = None
self._joined_buddies = {} # IP address -> buddy
self._ps_owner = ps_owner
def init_stream(self, service):
self._stream = Stream.new_from_service(service)
self._stream.set_data_listener(self._recv_message)
self._stream_writer = self._stream.new_writer()
def _recv_message(self, address, msg):
# Ignore multicast messages from ourself
if self._ps_owner and address == self._ps_owner.get_ip4_address():
return
# Ensure the message comes from somebody in this activity
if not self._joined_buddies.has_key(address):
logging.debug("Message from unjoined buddy.")
return
# Convert the points to an array and send to the sketchpad
points = []
msg = msg.strip()
split_coords = msg.split(" ")
for item in split_coords:
x = 0
y = 0
try:
(x, y) = item.split(",")
x = float(x)
y = float(y)
except ValueError:
continue
if x < 0 or y < 0:
continue
points.append((x, y))
buddy = self._joined_buddies[address]
self.emit("new-path", buddy, points)
def _buddy_joined(self, widget, activity, buddy, activity_type):
activity_service = buddy.get_service_of_type(activity_type, activity)
if not activity_service:
logging.debug("Buddy Joined, but could not get activity service " \
"of %s" % activity_type)
return
address = activity_service.get_source_address()
port = activity_service.get_port()
if not address or not port:
logging.debug("Buddy Joined, but could not get address/port from" \
" activity service %s" % activity_type)
return
if not self._joined_buddies.has_key(address):
logging.debug("Buddy joined: %s (%s)" % (address, port))
self._joined_buddies[address] = buddy
def _buddy_left(self, widget, activity, buddy, activity_type):
buddy_key = None
for (key, value) in self._joined_buddies.items():
if value == buddy:
buddy_key = key
break
if buddy_key:
del self._joined_buddies[buddy_key]
def new_local_sketch(self, path):
""" Receive an array of point tuples the local user created """
cmd = ""
# Convert points into the wire format
for point in path:
cmd = cmd + "%d,%d " % (point[0], point[1])
# If there were no points, or we aren't in a shared activity yet,
# don't send anything
if not len(cmd) or not self._stream_writer:
return
# Send the points to other buddies
self._stream_writer.write(cmd)
def _html_to_rgb_color(colorstring):
""" converts #RRGGBB to cairo-suitable floats"""
colorstring = colorstring.strip()
while colorstring[0] == '#':
colorstring = colorstring[1:]
r = int(colorstring[:2], 16)
g = int(colorstring[2:4], 16)
b = int(colorstring[4:6], 16)
color = ((float(r) / 255.0), (float(g) / 255.0), (float(b) / 255.0))
return color
class SharedSketchPad(SketchPad.SketchPad):
def __init__(self, net_controller, color):
SketchPad.SketchPad.__init__(self, bgcolor=(1.0, 0.984313725, 0.560784314))
self._net_controller = net_controller
self._user_color = _html_to_rgb_color(color)
self.set_color(self._user_color)
# Receive notifications when our buddies send us new sketches
self._net_controller.connect('new-path', self._new_buddy_path)
self.connect('new-user-sketch', self._new_local_sketch_cb)
def _new_buddy_path(self, net_controller, buddy, path):
""" Called whenever a buddy on the mesh sends us a new sketch path """
str_color = buddy.get_color()
if not str_color:
str_color = "#348798" # FIXME
color = IconColor(str_color)
stroke_color = _html_to_rgb_color(color.get_stroke_color())
sketch = Sketch.Sketch(stroke_color)
for item in path:
sketch.add_point(item[0], item[1])
self.add_sketch(sketch)
def _new_local_sketch_cb(self, widget, sketch):
""" Send the sketch the user just made to the network """
self._net_controller.new_local_sketch(sketch.get_points())
class SketchActivity(Activity):
__gsignals__ = {
'buddy-joined':(gobject.SIGNAL_RUN_FIRST, gobject.TYPE_NONE,
([gobject.TYPE_PYOBJECT, gobject.TYPE_PYOBJECT, gobject.TYPE_PYOBJECT])),
'buddy-left': (gobject.SIGNAL_RUN_FIRST, gobject.TYPE_NONE,
([gobject.TYPE_PYOBJECT, gobject.TYPE_PYOBJECT, gobject.TYPE_PYOBJECT]))
}
def __init__(self):
Activity.__init__(self)
self.connect('destroy', self._cleanup_cb)
self.set_title("Sketch")
self._ps = PresenceService.get_instance()
self._ps_activity = None
self._owner = self._ps.get_owner()
self._net_controller = NetworkController(self, self._owner)
self._sketchpad = SharedSketchPad(self._net_controller,
profile.get_color().get_stroke_color())
self.add(self._sketchpad)
self.show_all()
def get_ps(self):
return self._ps
def _cleanup_cb(self):
del self._net_controller
def share(self):
Activity.share(self)
self._net_controller.init_stream(self._service)
self._ps.connect('activity-appeared', self._activity_appeared_cb)
def join(self, activity_ps):
Activity.join(self, activity_ps)
self._net_controller.init_stream(self._service)
self._ps.connect('activity-appeared', self._activity_appeared_cb)
self._activity_appeared_cb(self._ps, activity_ps)
def _activity_appeared_cb(self, ps, activity):
# Only care about our own activity
if activity.get_id() != self.get_id():
return
# If we already have found our shared activity, do nothing
if self._ps_activity:
return
self._ps_activity = activity
# Connect signals to the shared activity so we are notified when
# buddies join and leave
self._ps_activity.connect('buddy-joined', self._add_buddy)
self._ps_activity.connect('buddy-left', self._remove_buddy)
# Get the list of buddies already in this shared activity so we can
# connect to them
buddies = self._ps_activity.get_joined_buddies()
for buddy in buddies:
self._add_buddy(self._ps_activity, buddy)
def _add_buddy(self, ps_activity, buddy):
service_type = self._ps_activity
self.emit('buddy-joined', ps_activity, buddy, self.get_default_type())
def _remove_buddy(self, ps_activity, buddy):
self.emit('buddy-left', ps_activity, buddy, self.get_default_type())
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