288 lines
9.6 KiB
Python
Executable File
288 lines
9.6 KiB
Python
Executable File
#!/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 logging
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from gi.repository import GObject, Gio, GLib
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logger = logging.getLogger('tuhi.dbus')
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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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<method name='StartSearch'>
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<annotation name='org.freedesktop.DBus.Method.NoReply' value='true'/>
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</method>
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<method name='StopSearch'>
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<annotation name='org.freedesktop.DBus.Method.NoReply' value='true'/>
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</method>
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<signal name='SearchStopped'>
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<arg name='status' type='i' />
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</signal>
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<signal name='PairableDevice'>
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<arg name='info' type='o' />
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</signal>
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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='Pair'>
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<arg name='result' type='i' direction='out'/>
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</method>
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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='ButtonPressRequired' />
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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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class TuhiDBusDevice(GObject.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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__gsignals__ = {
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"pair-requested":
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(GObject.SIGNAL_RUN_FIRST, None, ()),
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}
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def __init__(self, device, connection, paired=True):
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GObject.Object.__init__(self)
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self.name = device.name
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self.btaddr = device.address
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self.width, self.height = 0, 0
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self.drawings = []
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self.paired = paired
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objpath = device.address.replace(':', '_')
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self.objpath = "{}/{}".format(BASE_PATH, objpath)
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self._connection = connection
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self._dbusid = self._register_object(connection)
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def remove(self):
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self._connection.unregister_object(self._dbusid)
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self._dbusid = None
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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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return connection.register_object(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 == 'Pair':
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# FIXME: we should cache the method invocation here, wait for a
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# successful result from Tuhi and then return the value
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self._pair()
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result = GLib.Variant.new_int32(0)
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invocation.return_value(GLib.Variant.new_tuple(result))
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elif methodname == 'Listen':
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self._listen()
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invocation.return_value()
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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 _pair(self):
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self.emit('pair-requested')
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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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def add_drawing(self, drawing):
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self.drawings.append(drawing)
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def notify_button_press_required(self):
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logger.debug("Sending ButtonPressRequired signal")
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self._connection.emit_signal(None, self.objpath, INTF_DEVICE,
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"ButtonPressRequired", None)
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class TuhiDBusServer(GObject.Object):
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"""
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Class for the DBus server.
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"""
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__gsignals__ = {
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"bus-name-acquired":
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(GObject.SIGNAL_RUN_FIRST, None, ()),
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# Signal arguments:
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# search_stop_handler(status)
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# to be called when the search process has terminated, with
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# an integer status code (0 == success, negative errno)
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"search-start-requested":
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(GObject.SIGNAL_RUN_FIRST, None, (GObject.TYPE_PYOBJECT,)),
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"search-stop-requested":
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(GObject.SIGNAL_RUN_FIRST, None, ()),
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}
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def __init__(self):
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GObject.Object.__init__(self)
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self._devices = []
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self._pairable_devices = {}
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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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self._is_searching = False
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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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self._connection = connection
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def _bus_name_aquired(self, connection, name):
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logger.debug('Bus name aquired')
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self.emit('bus-name-acquired')
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def _bus_name_lost(self, connection, name):
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pass
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def _method_cb(self, connection, sender, objpath, interface, methodname, args, invocation):
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if interface != INTF_MANAGER:
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return None
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if methodname == 'StartSearch':
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self._start_search()
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invocation.return_value()
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elif methodname == 'StopSearch':
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self._stop_search()
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invocation.return_value()
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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 if d.paired])
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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 _start_search(self):
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if self._is_searching:
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return
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self._is_searching = True
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self.emit("search-start-requested", self._on_search_stop)
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def _stop_search(self):
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if not self._is_searching:
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return
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self._is_searching = False
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self.emit("search-stop-requested")
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def _on_search_stop(self, status):
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"""
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Called by whoever handles the search-start-requested signal
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"""
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logger.debug("Search has stopped")
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self._is_searching = False
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status = GLib.Variant.new_int32(status)
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status = GLib.Variant.new_tuple(status)
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self._connection.emit_signal(None, BASE_PATH, INTF_MANAGER,
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"SearchStopped", status)
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for dev in self._devices:
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if dev.paired:
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continue
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dev.remove()
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self._devices = [d for d in self._devices if d.paired]
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def cleanup(self):
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Gio.bus_unown_name(self._dbus)
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def create_device(self, device, paired=True):
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dev = TuhiDBusDevice(device, self._connection, paired)
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self._devices.append(dev)
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if not paired:
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arg = GLib.Variant.new_object_path(dev.objpath)
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self._connection.emit_signal(None, BASE_PATH, INTF_MANAGER,
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"PairableDevice",
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GLib.Variant.new_tuple(arg))
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return dev
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