AaronFiore/electrum
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qt history list: use OrderedDictWithIndex for txns

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SomberNight
2018-12-08 04:22:53 +01:00
parent 8bb930dd04
commit 65e8eef87f
2 changed files with 48 additions and 32 deletions
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26
electrum/util.py
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@@ -1010,46 +1010,54 @@ class OrderedDictWithIndex(OrderedDict):
def __init__(self):
super().__init__()
self._key_to_pos = {}
self._pos_to_key = {}
def _recalc_key_to_pos(self):
def _recalc_index(self):
self._key_to_pos = {key: pos for (pos, key) in enumerate(self.keys())}
self._pos_to_key = {pos: key for (pos, key) in enumerate(self.keys())}
def get_pos_of_key(self, key):
def pos_from_key(self, key):
return self._key_to_pos[key]
def value_from_pos(self, pos):
key = self._pos_to_key[pos]
return self[key]
def popitem(self, *args, **kwargs):
ret = super().popitem(*args, **kwargs)
self._recalc_key_to_pos()
self._recalc_index()
return ret
def move_to_end(self, *args, **kwargs):
ret = super().move_to_end(*args, **kwargs)
self._recalc_key_to_pos()
self._recalc_index()
return ret
def clear(self):
ret = super().clear()
self._recalc_key_to_pos()
self._recalc_index()
return ret
def pop(self, *args, **kwargs):
ret = super().pop(*args, **kwargs)
self._recalc_key_to_pos()
self._recalc_index()
return ret
def update(self, *args, **kwargs):
ret = super().update(*args, **kwargs)
self._recalc_key_to_pos()
self._recalc_index()
return ret
def __delitem__(self, *args, **kwargs):
ret = super().__delitem__(*args, **kwargs)
self._recalc_key_to_pos()
self._recalc_index()
return ret
def __setitem__(self, key, *args, **kwargs):
is_new_key = key not in self
ret = super().__setitem__(key, *args, **kwargs)
if is_new_key:
self._key_to_pos[key] = len(self) - 1
pos = len(self) - 1
self._key_to_pos[key] = pos
self._pos_to_key[pos] = key
return ret