Add the basic DBus server implementation
This commit is contained in:
Peter Hutterer
parent
ea91eef4bc
commit
89cf8ef67d
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#!/usr/bin/env python3
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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from tuhi.dbusserver import TuhiDBusServer
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from gi.repository import GObject
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import sys
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def main(args):
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t = TuhiDBusServer()
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try:
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import tuhi.ble
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tuhi.ble.main(None)
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GObject.MainLoop().run()
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except KeyboardInterrupt:
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pass
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finally:
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t.cleanup()
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if __name__ == "__main__":
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main(sys.argv)
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@ -0,0 +1,208 @@
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#!/usr/bin/env python3
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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import sys
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import json
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from gi.repository import GObject, Gio, GLib
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INTROSPECTION_XML = """
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<node>
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<interface name='org.freedesktop.tuhi1.Manager'>
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<property type='ao' name='Devices' access='read'>
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<annotation name='org.freedesktop.DBus.Property.EmitsChangedSignal' value='true'/>
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</property>
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</interface>
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<interface name='org.freedesktop.tuhi1.Device'>
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<property type='s' name='Name' access='read'/>
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<property type='uu' name='Dimensions' access='read'/>
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<property type='u' name='DrawingsAvailable' access='read'>
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<annotation name='org.freedesktop.DBus.Property.EmitsChangedSignal' value='true'/>
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</property>
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<method name='Listen'>
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<annotation name='org.freedesktop.DBus.Method.NoReply' value='true'/>
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</method>
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<method name='GetJSONData'>
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<arg name='index' type='u' direction='in'/>
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<arg name='json' type='s' direction='out'/>
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</method>
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<signal name='ListenComplete'>
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<arg name='status' type='i' />
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</signal>
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</interface>
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</node>
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"""
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BASE_PATH = '/org/freedesktop/tuhi1'
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BUS_NAME = 'org.freedesktop.tuhi1'
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INTF_MANAGER = 'org.freedesktop.tuhi1.Manager'
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INTF_DEVICE = 'org.freedesktop.tuhi1.Device'
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JSON_FILE_FORMAT_VERSION = 1
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class TuhiDrawing(object):
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class TuhiDrawingStroke(object):
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def __init__(self):
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pass
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def to_dict(self):
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d = {}
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for key in ['toffset', 'position', 'pressure']:
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val = getattr(self, key, None)
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if val is not None:
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d['key'] = val
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return d
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def __init__(self, device):
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self.device = device
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self.timestamp = 0
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self.strokes = []
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def json(self):
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json_data = {
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'version': JSON_FILE_FORMAT_VERSION,
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'devicename': self.device.name,
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'dimensions' : [self.device.width, self.device.height],
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'strokes': [s.to_dict for s in self.strokes]
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}
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return json.dumps(json_data)
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class TuhiDBusDevice(object):
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"""
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Class representing a DBus object for a Tuhi device. This class only
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handles the DBus bits, communication with the device is done elsewhere.
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"""
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def __init__(self, btaddr, connection):
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self.name = 'UNKNOWN'
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self.btaddr = btaddr
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self.width, self.height = 0, 0
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self.drawings = []
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self.objpath = "{}/{}".format(BASE_PATH, btaddr)
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self._register_object(connection)
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def _register_object(self, connection):
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introspection = Gio.DBusNodeInfo.new_for_xml(INTROSPECTION_XML)
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intf = introspection.lookup_interface(INTF_DEVICE)
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Gio.DBusConnection.register_object(connection,
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self.objpath,
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intf,
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self._method_cb,
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self._property_read_cb,
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self._property_write_cb)
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def _method_cb(self, connection, sender, objpath, interface, methodname, args, invocation):
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if interface != INTF_DEVICE:
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return None
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if methodname == 'Listen':
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self._listen()
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elif methodname == 'GetJSONData':
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json = GLib.Variant.new_string(self._json_data(args))
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invocation.return_value(GLib.Variant.new_tuple(json))
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def _property_read_cb(self, connection, sender, objpath, interface, propname):
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if interface != INTF_DEVICE:
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return None
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if propname == 'Name':
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return GLib.Variant.new_string(self.name)
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elif propname == 'Address':
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return GLib.Variant.new_string(self.btaddr)
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elif propname == 'Dimensions':
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w = GLib.Variant.new_uint32(self.width)
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h = GLib.Variant.new_uint32(self.height)
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return GLib.Variant.new_tuple(w, h)
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elif propname == 'DrawingsAvailable':
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return GLib.Variant.new_uint32(len(self.drawings))
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return None
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def _property_write_cb(self):
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pass
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def _listen(self):
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# FIXME: start listen asynchronously
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# FIXME: update property when listen finishes
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pass
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def _json_data(self, args):
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index = args[0]
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return self.drawings[index].json()
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class TuhiDBusServer(object):
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"""
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Class for the DBus server.
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"""
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def __init__(self):
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self._dbus = Gio.bus_own_name(Gio.BusType.SESSION,
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BUS_NAME,
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Gio.BusNameOwnerFlags.NONE,
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self._bus_aquired,
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self._bus_name_aquired,
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self._bus_name_lost)
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def _bus_aquired(self, connection, name):
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introspection = Gio.DBusNodeInfo.new_for_xml(INTROSPECTION_XML)
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intf = introspection.lookup_interface(INTF_MANAGER)
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Gio.DBusConnection.register_object(connection,
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BASE_PATH,
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intf,
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self._method_cb,
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self._property_read_cb,
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self._property_write_cb)
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# FIXME this shold be using the btaddr
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self._devices = [TuhiDBusDevice(0, connection)]
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def _bus_name_aquired(self, connection, name):
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pass
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def _bus_name_lost(self, connection, name):
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pass
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def _method_cb(self):
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pass
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def _property_read_cb(self, connection, sender, objpath, interface, propname):
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if interface != INTF_MANAGER:
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return None
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if propname == 'Devices':
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return GLib.Variant.new_objv([d.objpath for d in self._devices])
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return None
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def _property_write_cb(self):
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pass
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def cleanup(self):
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Gio.bus_unown_name(self._dbus)
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def main(args):
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t = TuhiDBusServer()
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try:
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GObject.MainLoop().run()
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except KeyboardInterrupt:
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pass
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finally:
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t.cleanup()
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if __name__ == "__main__":
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main(sys.argv)
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