#!/usr/bin/python

# Copyright (C) 2010 Jose Aliste <jose.aliste@gmail.com>
#               2011 Benjamin Kellermann <Benjamin.Kellermann@tu-dresden.de>
#
# Translated from Bash to Python by Juergen Spitzmueller <spitz@lyx.org> 2017.
#
# This program is free software; you can redistribute it and/or modify it under
# the terms of the GNU General Public Licence as published by the Free Software
# Foundation; either version 2 of the Licence, 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 Licence for more 
# details.
#
# You should have received a copy of the GNU General Public Licence along with
# this program; if not, write to the Free Software Foundation, Inc., 51 Franklin
# Street, Fifth Floor, Boston, MA  02110-1301, USA

import sys, os.path
from subprocess import Popen, call

editor_cmd = "lyxclient -g %f %l"

def print_usage():
    print("Usage: evince_sync_lyx pdf_file")
    sys.exit(1)

if len(sys.argv) != 2:
    print_usage()

pdf_file = os.path.abspath(sys.argv[1])

if not os.path.isfile(pdf_file):
    print_usage()

synctex_file, ext = os.path.splitext(pdf_file)

synctex_file += ".synctex.gz"

SyncTeX = False

if os.path.isfile(synctex_file):
    bsproc = Popen(["evince_backward_search", pdf_file, editor_cmd])
    SyncTeX = True

vproc = Popen(['evince', pdf_file])
vproc.wait()

if SyncTeX:
    bsproc.terminate()