64 lines
1.4 KiB
Python
64 lines
1.4 KiB
Python
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# -*- coding: utf-8 -*-
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"""
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Mix-ins for bound classes
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"""
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class NeedsStart(object):
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"""
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This mixin enforces Start/Finish routines
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"""
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started = False
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def prepare(self):
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"""
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Enforce Suspend/Start
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"""
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if self.api.prepare():
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if not self.started:
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self.Start()
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return self.started
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else:
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return False
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def Start(self):
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if self.started:
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return True
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if self.api.prepare():
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self.started = self.cls.Start(self)
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if self.started:
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self.api.started.append(self)
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return self.started
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else:
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return False
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start = Start
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def Finish(self):
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if self.started:
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self.cls.Finish(self)
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self.started = False
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if self in self.api.started:
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self.api.started.remove(self)
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finish = Finish
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class NoStart(object):
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"""
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This mixin enforces Suspend, and disables Start/Finish
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"""
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def prepare(self):
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"""
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Enforce Suspend
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"""
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return self.api.prepare()
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def Start(self):
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raise Exception("{0.cls} does not need Start()".format(self))
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start = Start
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def Finish(self):
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raise Exception("{0.cls} does not need Finish()".format(self))
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finish = Finish
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