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# -*- coding: utf-8 -*-
# Songwrite 3
# Copyright (C) 2016-2016 Jean-Baptiste LAMY -- jibalamy@free.fr
#
# 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 3 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, see <http://www.gnu.org/licenses/>.
import sys, os, atexit
try:
import getpass
username = getpass.getuser()
PIPE = "/tmp/songwrite3_pipe_%s" % username
except:
PIPE = ""
def is_already_running():
if (not PIPE) or (not os.path.exists(PIPE)): return False
return True
def create():
global PIPE
if PIPE:
try:
os.mkfifo(PIPE)
except:
print("WARNING: Cannot open pipe %s." % PIPE, file = sys.stderr)
atexit.register(destroy)
def destroy():
if PIPE: os.unlink(PIPE)
THREAD = None
def listen():
global THREAD # QThread must be kept in memory
import PyQt5.QtCore as qtcore, songwrite3.model as model
class ListeningThread(qtcore.QThread):
commandReceived = qtcore.pyqtSignal([str])
def run(self):
while 1:
f = open(PIPE, "r")
command = f.readline()[:-1]
f.close()
if command:
print("Received from pipe:", command, file = sys.stderr)
self.commandReceived.emit(command)
THREAD = ListeningThread()
THREAD.commandReceived.connect(on_pipe_command_received)
THREAD.start()
def send(command):
import threading
class SendingThread(threading.Thread):
def __init__(self):
threading.Thread.__init__(self)
self.done = False
def run(self):
f = open(PIPE, "w")
if self.done: return # Timeouted
f.write(command + "\n")
f.close()
self.done = True
thread = SendingThread()
thread.start()
thread.join(0.5) # Time out
if not thread.done:
thread.done = True # Prevent the thread from writing later
return False
else: return True
def on_pipe_command_received(command):
try:
if command.startswith("open "):
import songwrite3.model as model, songwrite3.main as main
song = model.get_song(command[5:])
main.App(song)
elif command.startswith("new "):
import songwrite3.main as main
main.App()
else:
print("WARNING: Unknown command received!")
except: sys.excepthook(*sys.exc_info())
if __name__ == "__main__":
send("open /home/jiba/audio/tablatures/cours_tristan/tristan_reve.sw.xml")
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