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from collections import namedtuple
_AB = namedtuple("_AB", ["a", "b"])
class ABController:
def __init__(self):
self.setPositionCallback = None
self._limits = dict() # dictionary of all songs
self._songLimits = None # list of limits for selected song
self._currentLimits = None # a/b positions of selected limit
def setCurrentSong(self, path):
if path not in self._limits:
self._limits[path] = list()
self._songLimits = self._limits[path]
self._currentLimits = None
def addLimits(self, aLimit, bLimit):
if self._songLimits is None:
return
ab = _AB(aLimit, bLimit)
self._songLimits.append(ab)
def setCurrentLimits(self, index):
if not self._songLimits:
return
if index >= 0 and index < len(self._songLimits):
self._currentLimits = self._songLimits[index]
def positionChanged(self, position):
if not self._currentLimits:
return
if position > self._currentLimits.b and self.setPositionCallback:
self.setPositionCallback(self._currentLimits.a)
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