DNDtest.py

#!/usr/bin/python

import time

from Quartz import CGGetActiveDisplayList, CGGetOnlineDisplayList
from CoreFoundation import CFPreferencesCopyAppValue


def displayMirroringActive():
    '''Returns True if any two displays are mirroring, False otherwise'''
    # maximum number of displays to return
    max_displays = 100
    # get active display list
    # CGGetActiveDisplayList:
    #     Provides a list of displays that are active (or drawable).
    (err, active_displays, number_of_active_displays) = CGGetActiveDisplayList(
         max_displays, None, None)
    if err:
        return False
    
    # get online display list
    # CGGetOnlineDisplayList:
    #     Provides a list of displays that are online 
    #     (active, mirrored, or sleeping).
    (err, online_displays, number_of_online_displays) = CGGetOnlineDisplayList(
         max_displays, None, None)
    if err:
        return False
    # if one or more displays are mirrored, the number of active displays
    # will be fewer than the number of online displays
    return number_of_active_displays < number_of_online_displays


def dndIsActive():
    '''Returns True if Notification Center's Do Not Disturb is active.'''

    PREFSDOMAIN = 'com.apple.notificationcenterui'
    # first just check if the doNotDisturb preference is set (fails on 10.9)
    doNotDisturb = (CFPreferencesCopyAppValue('doNotDisturb', PREFSDOMAIN) or
                    False)
    if doNotDisturb:
        return True

    # check to see if dndStart and dndStart are defined, and if so, if
    # we are inside the times
    try:
        dndStart = int(CFPreferencesCopyAppValue('dndStart', PREFSDOMAIN))
        dndEnd = int(CFPreferencesCopyAppValue('dndEnd', PREFSDOMAIN))
    except TypeError:
        dndStart = None
        dndEnd = None
    if dndStart and dndEnd:
        current_time = time.localtime()
        minutes_since_midnight = current_time.tm_hour * 60 + current_time.tm_min
        if dndStart < dndEnd:
            if dndStart <= minutes_since_midnight < dndEnd:
                return True
        else:
            if ((minutes_since_midnight < dndEnd) or
                (minutes_since_midnight >= dndStart)):
                return True

    # if dndMirroring is not explicitly False, if we are mirroring, return True
    if CFPreferencesCopyAppValue('dndMirroring', PREFSDOMAIN) is not False:
        return displayMirroringActive()

    # none of the above returned anything, so return False
    return False


print "DND: ", dndIsActive()