casa6

import os

import re

import sys

import time

import base64

import string

from casa_stack_manip import stack_frame_find

import __casac__

​

try:

    import dbus

    try:

        bus = dbus.SessionBus( )

        have_dbus_module = True

    except:

        print "warning: dbus is not properly configured, viewer scripting will not be available"

        have_dbus_module = False

        bus = None

except:

    print "warning: dbus is not available, viewer scripting will not be available"

    have_dbus_module = False

    bus = None

​

​

def dbus_connection( ):

    return bus

​

​

def seqselect(test, list):  

    """ 

    Select the elements from a sequence that 

    satisfy the given test function 

    - compare The test function should have following 

    signature def test(item): and must return a boolean 

    - list The List from which element need to be selected 

    """  

    selected = [ ]

    for item in list:  

        if test(item) == True:  

            selected.append(item)

    return selected  

​

​

class viewertool(object):

    "manage task engines"

​

    __t = string.maketrans("abcdefghijklmnopqrstuvwxyz0123456789/*:%$#@!&()~+,.:;{}[]|\\\"'^","abcdefghijklmnopqrstuvwxyz0123456789__________________________")

​

    ###

    ### 'use_existing' defaults to false because:

    ###    o  for linux a new dbus session daemon is started for each casapy

    ###    o  for osx it would result in multiple casapy sessions using the same viewer

    ###    o  for casa.py included into python it makes sense to avoid a new viewer

    ###             appearing (and sticking around) for each include

    ###

    def __init__( self, with_gui=True, pre_launch=False, use_existing=False ):

​

        if type(with_gui) != bool:

            raise Exception, "the 'with_gui' parameter must be a boolean"

​

        self.__state = { }

        self.__state['proxy'] = None

        self.__state['gui'] = with_gui