dbusclient/monitor.py

   1 import string
   2
   3 class Monitor(object):
   4     """A Base for printing signals on the bus"""
   5
   6     def __init__(self, bus):
   7         self.bus = bus
   8
   9         self.amap = {}
  10         self.specific = {}
  11         self.bus.add_signal_receiver(self.abbr_h,
  12                         path_keyword="path",
  13                         interface_keyword="interface",
  14                         member_keyword="member")
  15
  16     def ignore(self, dbus_interface, signal_name):
  17         self.watch(self.null_h, dbus_interface, signal_name)
  18
  19     def null_h(self, *args, **kwargs):
  20         pass
  21
  22     def watch(self, handler, dbus_interface, signal_name):
  23         self.specific[dbus_interface +"."+ signal_name] = True
  24         self.bus.add_signal_receiver(handler,
  25                                 dbus_interface=dbus_interface,
  26                                 signal_name=signal_name,
  27                                 path_keyword="path")
  28
  29     def abbr_h(self, *args, **kwargs):
  30         ifc = kwargs["interface"]
  31         sig = kwargs["member"]
  32         if self.specific.has_key(ifc +"."+ sig):
  33             return
  34
  35         opath = kwargs["path"]
  36         line = "SIG %s: %s.%s%s" % (self.abbrev(opath,"/"),
  37                                     self.abbrev(ifc,"."),
  38                                     sig, args)
  39         print line
  40
  41     def abbrev(self, s, sep):
  42         words = s.split(sep)
  43         words = map (self.a1, words)
  44         result = sep.join(words)
  45         if self.amap.has_key(result):
  46             if self.amap[result] != s:
  47                 print "ABBR COLLISION %s was %s now %s" % (result, self.amap[result], s)
  48         else:
  49             print "ABBR %s is %s" % (result, s)
  50         self.amap[result] = s
  51         return result
  52
  53     def a1(self, s):
  54         if s == "":
  55             return ""
  56         #print "#A", s
  57         # first char, delete lowercase and _ from the rest
  58         return s[0] + s[1:].translate(string.maketrans("", ""),
  59                                       string.lowercase + "_")