def undo(self, mod: modules.Module):
props = mod.get_exposed_props()
if self.before and self.before.keys() == props.keys() \
and props() == self.after:
mod.set_exposed_props(self.before)
return mod
else:
print("tried to undo, but the target props are", self.before,
"while the current are", props)
return None
def do(self, mod: modules.Module, pos: base.Vec2d) -> modules.Module:
self.pos = pos
self.before = mod_props = mod.get_exposed_props()
for name, change in self.changes.items():
if name in mod_props and self.type_test(change):
mod_props[name] = change
else:
return mod
self.after = mod_props
mod.set_exposed_props(mod_props)
return mod
