### *************************************************************************
### *
# DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
# 
# Copyright 2008 by Sun Microsystems, Inc.
#
# OpenOffice.org - a multi-platform office productivity suite
#
# $RCSfile: officehelper.py,v $
#
# $Revision: 1.3 $
#
# This file is part of OpenOffice.org.
#
# OpenOffice.org is free software: you can redistribute it and/or modify
# it under the terms of the GNU Lesser General Public License version 3
# only, as published by the Free Software Foundation.
#
# OpenOffice.org 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 version 3 for more details
# (a copy is included in the LICENSE file that accompanied this code).
#
# You should have received a copy of the GNU Lesser General Public License
# version 3 along with OpenOffice.org.  If not, see
# <http://www.openoffice.org/license.html>
# for a copy of the LGPLv3 License.
#
### ************************************************************************/

#
# Translated to python from "Bootstrap.java" by Kim Kulak
#

import os
import random
from sys import platform
from time import sleep

import uno
from com.sun.star.connection import NoConnectException
from com.sun.star.uno import Exception as UnoException


class BootstrapException(UnoException):
    pass

def bootstrap():
    """Bootstrap OOo and PyUNO Runtime.
    The soffice process is started opening a named pipe of random name, then the local context is used
	to access the pipe. This function directly returns the remote component context, from whereon you can
	get the ServiceManager by calling getServiceManager() on the returned object.
	"""
    try:
	# soffice script used on *ix, Mac; soffice.exe used on Windoof
        if "UNO_PATH" in os.environ:
            sOffice = os.environ["UNO_PATH"]
        else:
            sOffice = "" # lets hope for the best
        sOffice = os.path.join(sOffice, "soffice")
        if platform.startswith("win"): 
            sOffice += ".exe"
		
        # Generate a random pipe name.
        random.seed()
        sPipeName = "uno" + str(random.random())[2:]
        
        # Start the office proces, don't check for exit status since an exception is caught anyway if the office terminates unexpectedly.
        cmdArray = (sOffice, "-nologo", "-nodefault", "".join(["-accept=pipe,name=", sPipeName, ";urp;"]))        
        os.spawnv(os.P_NOWAIT, sOffice, cmdArray)
			
        # ---------

        xLocalContext = uno.getComponentContext()
        resolver = xLocalContext.ServiceManager.createInstanceWithContext(
			"com.sun.star.bridge.UnoUrlResolver", xLocalContext)
        sConnect = "".join(["uno:pipe,name=", sPipeName, ";urp;StarOffice.ComponentContext"])

        # Wait until an office is started, but loop only nLoop times (can we do this better???)
        nLoop = 20
        while True:
            try:
                xContext = resolver.resolve(sConnect)
                break
            except NoConnectException:
                nLoop -= 1
                if nLoop <= 0:
                    raise BootstrapException("Cannot connect to soffice server.", None)
                sleep(0.5)  # Sleep 1/2 second.

    except BootstrapException:
        raise     
    except Exception, e:  # Any other exception
        raise BootstrapException("Caught exception " + str(e), None)

    return xContext
