forked from openlp/openlp
100 lines
4.1 KiB
Python
100 lines
4.1 KiB
Python
# -*- coding: utf-8 -*-
|
|
# vim: autoindent shiftwidth=4 expandtab textwidth=120 tabstop=4 softtabstop=4
|
|
|
|
###############################################################################
|
|
# OpenLP - Open Source Lyrics Projection #
|
|
# --------------------------------------------------------------------------- #
|
|
# Copyright (c) 2008-2018 OpenLP Developers #
|
|
# --------------------------------------------------------------------------- #
|
|
# 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; version 2 of the License. #
|
|
# #
|
|
# 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., 59 #
|
|
# Temple Place, Suite 330, Boston, MA 02111-1307 USA #
|
|
###############################################################################
|
|
|
|
|
|
from PyQt5 import QtCore
|
|
from PyQt5 import QtNetwork
|
|
|
|
from openlp.core.common.registry import Registry
|
|
from openlp.core.common.mixins import LogMixin
|
|
|
|
|
|
class Server(QtCore.QObject, LogMixin):
|
|
"""
|
|
The local server to handle OpenLP running in more than one instance and allows file
|
|
handles to be transferred from the new to the existing one.
|
|
"""
|
|
|
|
def is_another_instance_running(self):
|
|
self._id = 'OpenLPDual'
|
|
# Is there another instance running?
|
|
self._outSocket = QtNetwork.QLocalSocket()
|
|
self._outSocket.connectToServer(self._id)
|
|
return self._outSocket.waitForConnected()
|
|
|
|
def post_to_server(self, args):
|
|
if 'OpenLP' in args:
|
|
args.remove('OpenLP')
|
|
# Yes, there is.
|
|
self._outStream = QtCore.QTextStream(self._outSocket)
|
|
self._outStream.setCodec('UTF-8')
|
|
self._outSocket.write(str.encode("".join(args)))
|
|
if not self._outSocket.waitForBytesWritten(10):
|
|
raise Exception(str(self._outSocket.errorString()))
|
|
self._outSocket.disconnectFromServer()
|
|
return False
|
|
|
|
def start_server(self):
|
|
# No, there isn't.
|
|
self._outSocket = None
|
|
self._outStream = None
|
|
self._inSocket = None
|
|
self._inStream = None
|
|
self._server = QtNetwork.QLocalServer()
|
|
self._server.listen(self._id)
|
|
self._server.newConnection.connect(self._on_new_connection)
|
|
return True
|
|
|
|
def _on_new_connection(self):
|
|
"""
|
|
Handle a new connection to the server
|
|
:return:
|
|
"""
|
|
if self._inSocket:
|
|
self._inSocket.readyRead.disconnect(self._on_ready_read)
|
|
self._inSocket = self._server.nextPendingConnection()
|
|
if not self._inSocket:
|
|
return
|
|
self._inStream = QtCore.QTextStream(self._inSocket)
|
|
self._inStream.setCodec('UTF-8')
|
|
self._inSocket.readyRead.connect(self._on_ready_read)
|
|
|
|
def _on_ready_read(self):
|
|
"""
|
|
Read a record passed to the server and load a service
|
|
:return:
|
|
"""
|
|
msg = self._inStream.readLine()
|
|
if msg:
|
|
self.log_debug("socket msg = " + msg)
|
|
Registry().get('service_manager').on_load_service_clicked(msg)
|
|
|
|
def close_server(self):
|
|
"""
|
|
Shutdown to local socket server and make sure the server is removed.
|
|
:return:
|
|
"""
|
|
if self._server:
|
|
self._server.close()
|
|
# Make sure the server file is removed.
|
|
QtNetwork.QLocalServer.removeServer(self._id)
|