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enginefactory.py

# vim:set et sts=4 sw=4:
#
# ibus - The Input Bus
#
# Copyright (c) 2007-2008 Huang Peng <shawn.p.huang@gmail.com>
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2 of the License, or (at your option) any later version.
#
# This library 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 Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this program; if not, write to the
# Free Software Foundation, Inc., 59 Temple Place, Suite 330,
# Boston, MA  02111-1307  USA

import weakref
import gobject
import ibus
from engine import Engine

class EngineFactory(ibus.Object):
    def __init__(self, ibusconn, object_path):
        super(EngineFactory, self).__init__()
        self._ibusconn = ibusconn
        self._object_path = object_path
        self._factory = self._ibusconn.get_object(self._object_path)

        self._ibusconn.connect("destroy", self.__ibusconn_destroy_cb)

        self._ibusconn.connect("dbus-signal", self.__dbus_signal_cb)
        self._engines = weakref.WeakValueDictionary()

        self._info = None

    def get_object_path(self):
        return self._object_path

    def get_info(self):
        if self._info == None:
            self._info = self._factory.GetInfo()
        return self._info

    def create_engine(self):
        object_path = self._factory.CreateEngine()
        engine = Engine(self, self._ibusconn, object_path)
        self._engines[object_path] = engine
        return engine

    def destroy(self):
        ibus.Object.destroy(self)
        self._ibusconn = None
        self._factory = None

    def __ibusconn_destroy_cb(self, ibusconn):
        self.destroy()

    def __dbus_signal_cb(self, ibusconn, message):
        object_path = message.get_path()
        if object_path in self._engines:
            if self._engines[object_path].handle_dbus_signal(message):
                ibusconn.stop_emission("dbus-signal")
                return True
        return False

    # methods for cmp
    def __lt__(self, other):
        x = self.get_info()
        y = other.get_info()
        if x[1] < y[1]: return True
        if x[1] == y[1]: return x[0] < y[0]

    def __gt__(self, other):
        x = self.get_info()
        y = other.get_info()
        if x[1] > y[1]: return True
        if x[1] == y[1]: return x[0] > y[0]


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