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########################################################################
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# Created: February 15, 2005
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# Author: Ivan Vilata - reverse:com.carabos@ivilata
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# $Id: undoredo.py 1009 2005-06-15 13:39:15Z faltet $
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########################################################################
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Support for undoing and redoing actions.
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* undo(file, operation, *args)
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* redo(file, operation, *args)
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* moveToShadow(file, path)
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* moveFromShadow(file, path)
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* attrToShadow(file, path, name)
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* attrFromShadow(file, path, name)
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The format of documentation strings in this module.
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Repository version of this file.
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from tables.utils import splitPath
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__docformat__ = 'reStructuredText'
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"""The format of documentation strings in this module."""
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__version__ = '$Revision: 1009 $'
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"""Repository version of this file."""
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def undo(file_, operation, *args):
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if operation == 'CREATE':
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undoCreate(file_, args[0])
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elif operation == 'REMOVE':
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undoRemove(file_, args[0])
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elif operation == 'MOVE':
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undoMove(file_, args[0], args[1])
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elif operation == 'ADDATTR':
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undoAddAttr(file_, args[0], args[1])
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elif operation == 'DELATTR':
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undoDelAttr(file_, args[0], args[1])
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raise NotImplementedError("""\
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the requested unknown operation %r can not be undone; \
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please report this to the authors""" % operation)
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def redo(file_, operation, *args):
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if operation == 'CREATE':
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redoCreate(file_, args[0])
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elif operation == 'REMOVE':
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redoRemove(file_, args[0])
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elif operation == 'MOVE':
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redoMove(file_, args[0], args[1])
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elif operation == 'ADDATTR':
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redoAddAttr(file_, args[0], args[1])
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elif operation == 'DELATTR':
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redoDelAttr(file_, args[0], args[1])
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raise NotImplementedError("""\
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the requested unknown operation %r can not be redone; \
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please report this to the authors""" % operation)
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def moveToShadow(file_, path):
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node = file_.getNode(path)
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(shparent, shname) = file_._shadowName()
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node._g_move(shparent, shname)
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def moveFromShadow(file_, path):
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(shparent, shname) = file_._shadowName()
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node = getattr(shparent, shname)
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(pname, name) = splitPath(path)
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parent = file_.getNode(pname)
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node._g_move(parent, name)
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def undoCreate(file_, path):
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moveToShadow(file_, path)
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def redoCreate(file_, path):
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moveFromShadow(file_, path)
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def undoRemove(file_, path):
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moveFromShadow(file_, path)
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def redoRemove(file_, path):
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moveToShadow(file_, path)
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def undoMove(file_, origpath, destpath):
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(origpname, origname) = splitPath(origpath)
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node = file_.getNode(destpath)
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origparent = file_.getNode(origpname)
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node._g_move(origparent, origname)
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def redoMove(file_, origpath, destpath):
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(destpname, destname) = splitPath(destpath)
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node = file_.getNode(origpath)
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destparent = file_.getNode(destpname)
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node._g_move(destparent, destname)
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def attrToShadow(file_, path, name):
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attrs = file_.getNode(path)._v_attrs
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value = getattr(attrs, name)
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(shparent, shname) = file_._shadowName()
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shattrs = shparent._v_attrs
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# Set the attribute only if it has not been kept in the shadow.
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# This avoids re-pickling complex attributes on REDO.
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if not shname in shattrs:
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shattrs._g__setattr(shname, value)
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attrs._g__delattr(name)
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def attrFromShadow(file_, path, name):
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(shparent, shname) = file_._shadowName()
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shattrs = shparent._v_attrs
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value = getattr(shattrs, shname)
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attrs = file_.getNode(path)._v_attrs
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attrs._g__setattr(name, value)
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# Keeping the attribute in the shadow allows reusing it on Undo/Redo.
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##shattrs._g__delattr(shname)
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def undoAddAttr(file_, path, name):
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attrToShadow(file_, path, name)
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def redoAddAttr(file_, path, name):
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attrFromShadow(file_, path, name)
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def undoDelAttr(file_, path, name):
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attrFromShadow(file_, path, name)
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def redoDelAttr(file_, path, name):
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attrToShadow(file_, path, name)
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## py-indent-offset: 4
added
removed
tables/undoredo.py
