/usr/lib/python2.7/dist-packages/tables/undoredo.py is in python-tables 3.4.2-4.
This file is owned by root:root, with mode 0o644.
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########################################################################
#
# License: BSD
# Created: February 15, 2005
# Author: Ivan Vilata - reverse:net.selidor@ivan
#
# $Source$
# $Id$
#
########################################################################
"""Support for undoing and redoing actions.
Functions:
* undo(file, operation, *args)
* redo(file, operation, *args)
* move_to_shadow(file, path)
* move_from_shadow(file, path)
* attr_to_shadow(file, path, name)
* attr_from_shadow(file, path, name)
Misc variables:
`__docformat__`
The format of documentation strings in this module.
"""
from __future__ import absolute_import
from .path import split_path
__docformat__ = 'reStructuredText'
"""The format of documentation strings in this module."""
def undo(file_, operation, *args):
if operation == 'CREATE':
undo_create(file_, args[0])
elif operation == 'REMOVE':
undo_remove(file_, args[0])
elif operation == 'MOVE':
undo_move(file_, args[0], args[1])
elif operation == 'ADDATTR':
undo_add_attr(file_, args[0], args[1])
elif operation == 'DELATTR':
undo_del_attr(file_, args[0], args[1])
else:
raise NotImplementedError("the requested unknown operation %r can "
"not be undone; please report this to the "
"authors" % operation)
def redo(file_, operation, *args):
if operation == 'CREATE':
redo_create(file_, args[0])
elif operation == 'REMOVE':
redo_remove(file_, args[0])
elif operation == 'MOVE':
redo_move(file_, args[0], args[1])
elif operation == 'ADDATTR':
redo_add_attr(file_, args[0], args[1])
elif operation == 'DELATTR':
redo_del_attr(file_, args[0], args[1])
else:
raise NotImplementedError("the requested unknown operation %r can "
"not be redone; please report this to the "
"authors" % operation)
def move_to_shadow(file_, path):
node = file_._get_node(path)
(shparent, shname) = file_._shadow_name()
node._g_move(shparent, shname)
def move_from_shadow(file_, path):
(shparent, shname) = file_._shadow_name()
node = shparent._f_get_child(shname)
(pname, name) = split_path(path)
parent = file_._get_node(pname)
node._g_move(parent, name)
def undo_create(file_, path):
move_to_shadow(file_, path)
def redo_create(file_, path):
move_from_shadow(file_, path)
def undo_remove(file_, path):
move_from_shadow(file_, path)
def redo_remove(file_, path):
move_to_shadow(file_, path)
def undo_move(file_, origpath, destpath):
(origpname, origname) = split_path(origpath)
node = file_._get_node(destpath)
origparent = file_._get_node(origpname)
node._g_move(origparent, origname)
def redo_move(file_, origpath, destpath):
(destpname, destname) = split_path(destpath)
node = file_._get_node(origpath)
destparent = file_._get_node(destpname)
node._g_move(destparent, destname)
def attr_to_shadow(file_, path, name):
node = file_._get_node(path)
attrs = node._v_attrs
value = getattr(attrs, name)
(shparent, shname) = file_._shadow_name()
shattrs = shparent._v_attrs
# Set the attribute only if it has not been kept in the shadow.
# This avoids re-pickling complex attributes on REDO.
if not shname in shattrs:
shattrs._g__setattr(shname, value)
attrs._g__delattr(name)
def attr_from_shadow(file_, path, name):
(shparent, shname) = file_._shadow_name()
shattrs = shparent._v_attrs
value = getattr(shattrs, shname)
node = file_._get_node(path)
node._v_attrs._g__setattr(name, value)
# Keeping the attribute in the shadow allows reusing it on Undo/Redo.
# shattrs._g__delattr(shname)
def undo_add_attr(file_, path, name):
attr_to_shadow(file_, path, name)
def redo_add_attr(file_, path, name):
attr_from_shadow(file_, path, name)
def undo_del_attr(file_, path, name):
attr_from_shadow(file_, path, name)
def redo_del_attr(file_, path, name):
attr_to_shadow(file_, path, name)
## Local Variables:
## mode: python
## py-indent-offset: 4
## tab-width: 4
## End:
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