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# Copyright 2020 Canonical, Ltd.
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, version 3.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
class ControllerSet:
def __init__(self, controllers_mod, names, init_args=()):
self.controllers_mod = controllers_mod
self.controller_names = names[:]
self.init_args = init_args
self.index = -1
self.instances = []
def _get_controller_class(self, name):
cls_name = name+"Controller"
return getattr(self.controllers_mod, cls_name)
def load(self, name):
self.controller_names.remove(name)
klass = self._get_controller_class(name)
if hasattr(self, name):
c = 1
for instance in self.instances:
if isinstance(instance, klass):
c += 1
rep_cls = self._get_controller_class("Repeated")
inst = rep_cls(getattr(self, name), c)
name = inst.name
else:
inst = klass(*self.init_args)
setattr(self, name, inst)
self.instances.append(inst)
def load_all(self):
while self.controller_names:
self.load(self.controller_names[0])
@property
def cur(self):
if self.out_of_bounds():
return None
return self.instances[self.index]
def out_of_bounds(self):
return self.index < 0 or self.index >= len(self.instances)