+class InfoBarBase:
+ def __init__(self, steal_current_service = False):
+ if steal_current_service:
+ ServiceEventTracker.setActiveInfoBar(self, None, None)
+ else:
+ nav = self.session.nav
+ ServiceEventTracker.setActiveInfoBar(self, not steal_current_service and nav.getCurrentService(), nav.getCurrentlyPlayingServiceReference())
+ self.onClose.append(self.__close)
+
+ def __close(self):
+ ServiceEventTracker.popActiveInfoBar()
+
class ServiceEventTracker:
"""Tracks service events into a screen"""
-
+ InfoBarStack = [ ]
+ InfoBarStackSize = 0
+ oldService = None
+
def __init__(self, screen, eventmap):
self.__eventmap = eventmap
- self.session = screen.session
- self.session.nav.event.append(self.__event)
+ self.screen = screen
+ screen.session.nav.event.append(self.__event)
screen.onClose.append(self.__del_event)
def __del_event(self):
- self.session.nav.event.remove(self.__event)
+ self.screen.session.nav.event.remove(self.__event)
def __event(self, ev):
+ set = ServiceEventTracker
+ screen = self.screen
+ nav = screen.session.nav
+ cur_ref = nav.getCurrentlyPlayingServiceReference()
+ old_service_running = set.oldRef and cur_ref and cur_ref == set.oldRef and set.oldService and set.oldService == str(nav.getCurrentService())
+ if not old_service_running:
+ set.oldService = None
+ set.oldRef = None
+# print "old_service_running", old_service_running
if ev in self.__eventmap:
- self.__eventmap[ev]()
+ ssize = set.InfoBarStackSize
+ stack = set.InfoBarStack
+ if (not isinstance(screen, InfoBarBase) or # let pass all events to screens not derived from InfoBarBase
+ (not old_service_running and ssize and stack[ssize-1] == screen) or # let pass events from currently running service just to current active screen (derived from InfoBarBase)
+ (old_service_running and ssize > 1 and stack[ssize-2] == screen)): # let pass events from old running service just to previous active screen (derived from InfoBarBase)
+ self.__eventmap[ev]()
+# else:
+# print "ignore event", ev, "for inactive infobar '" + str(self.screen) + "'"
+
+ @staticmethod
+ def setActiveInfoBar(infobar, old_service, old_ref):
+ set = ServiceEventTracker
+ set.oldRef = old_ref
+ set.oldService = old_service and str(old_service)
+ assert infobar not in set.InfoBarStack, "FATAL: Infobar '" + str(infobar) + "' is already active!"
+ set.InfoBarStack.append(infobar)
+ set.InfoBarStackSize += 1
+# print "ServiceEventTracker set active '" + str(infobar) + "'"
+
+ @staticmethod
+ def popActiveInfoBar():
+ set = ServiceEventTracker
+ stack = set.InfoBarStack
+ if set.InfoBarStackSize:
+ set.InfoBarStackSize -= 1
+ del stack[set.InfoBarStackSize]
+# if set.InfoBarStackSize:
+# print "ServiceEventTracker reset active '" + str(stack[set.InfoBarStackSize-1]) + "'"