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- # -*- coding: utf-8 -*-
- #
- # Copyright (C) 2012 Ben Kurtovic <ben.kurtovic@verizon.net>
- #
- # Permission is hereby granted, free of charge, to any person obtaining a copy
- # of this software and associated documentation files (the "Software"), to deal
- # in the Software without restriction, including without limitation the rights
- # to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- # copies of the Software, and to permit persons to whom the Software is
- # furnished to do so, subject to the following conditions:
- #
- # The above copyright notice and this permission notice shall be included in
- # all copies or substantial portions of the Software.
- #
- # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- # FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- # AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- # LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- # SOFTWARE.
-
- import sys
-
- __all__ = ["SmartList"]
-
- class SmartList(list):
- def __init__(self, iterable=None):
- if iterable:
- super(SmartList, self).__init__(iterable)
- else:
- super(SmartList, self).__init__()
- self._children = {}
-
- def __getitem__(self, key):
- if not isinstance(key, slice):
- return super(SmartList, self).__getitem__(key)
- sliceinfo = [key.start, key.stop, 1 if not key.step else key.step]
- child = _ListProxy(self, sliceinfo)
- self._children[id(child)] = (child, sliceinfo)
- return child
-
- def __setitem__(self, key, item):
- if not isinstance(key, slice):
- return super(SmartList, self).__setitem__(key, item)
- item = list(item)
- super(SmartList, self).__setitem__(key, item)
- diff = len(item) - key.stop + key.start
- if diff:
- for child, (start, stop, step) in self._children.itervalues():
- if start >= key.stop:
- self._children[id(child)][1][0] += diff
- if stop >= key.stop and stop != sys.maxint:
- self._children[id(child)][1][1] += diff
-
- __delitem__
-
- def __getslice__(self, start, stop):
- return self.__getitem__(slice(start, stop))
-
- def __setslice__(self, start, stop, iterable):
- self.__setitem__(slice(start, stop), iterable)
-
- def __delslice__(self, start, stop):
- self.__delitem__(slice(start, stop))
-
- __add__
-
- __radd__
-
- __iadd__
-
- __mul__
-
- __rmul__
-
- __imul__
-
- def append(self, item):
- super(SmartList, self).append(item)
- for child, (start, stop, step) in self._children.itervalues():
- if stop >= len(self) - 1 and stop != sys.maxint:
- self._children[id(child)][1][1] += 1
-
- count
-
- index
-
- extend
-
- insert
-
- pop
-
- remove
-
- reverse
-
- sort
-
-
- class _ListProxy(list):
- def __init__(self, parent, sliceinfo):
- super(_ListProxy, self).__init__()
- self._parent = parent
- self._sliceinfo = sliceinfo
-
- def __repr__(self):
- return repr(self._render())
-
- __lt__
-
- __le__
-
- __eq__
-
- __ne__
-
- __gt__
-
- __ge__
-
- __nonzero__
-
- def __len__(self):
- return (self._stop - self._start) / self._step
-
- def __getitem__(self, key):
- return self._render()[key]
-
- def __setitem__(self, key, item):
- if isinstance(key, slice):
- adjusted = slice(key.start + self._start, key.stop + self._stop,
- key.step)
- self._parent[adjusted] = item
- else:
- self._parent[self._start + index] = item
-
- __delitem__
-
- def __iter__(self):
- i = self._start
- while i < self._stop:
- yield self._parent[i]
- i += self._step
-
- def __reversed__(self):
- i = self._stop - 1
- while i >= self._start:
- yield self._parent[i]
- i -= self._step
-
- def __contains__(self, item):
- return item in self._render()
-
- def __getslice__(self, start, stop):
- return self.__getitem__(slice(start, stop))
-
- def __setslice__(self, start, stop, iterable):
- self.__setitem__(slice(start, stop), iterable)
-
- def __delslice__(self, start, stop):
- self.__delitem__(slice(start, stop))
-
- __add__
-
- __radd__
-
- __iadd__
-
- __mul__
-
- __rmul__
-
- __imul__
-
- @property
- def _start(self):
- return self._sliceinfo[0]
-
- @property
- def _stop(self):
- return self._sliceinfo[1]
-
- @property
- def _step(self):
- return self._sliceinfo[2]
-
- def _render(self):
- return self._parent[self._start:self._stop:self._step]
-
- def append(self, obj):
- self._parent.insert(self._stop, obj)
-
- count
-
- index
-
- extend
-
- def insert(self, index, obj):
- self._parent.insert(self._start + index, obj)
-
- pop
-
- remove
-
- reverse
-
- sort
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