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"""
***************************************************************************
edit.py
---------------------
Date : May 2018
Copyright : (C) 2018 by Denis Rouzaud
Email : denis@opengis.ch
***************************************************************************
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
***************************************************************************
"""
class QgsEditError(Exception):
def __init__(self, value):
self.value = value
def __str__(self):
return repr(self.value)
class edit:
def __init__(self, layer):
self.layer = layer
def __enter__(self):
assert self.layer.startEditing()
return self.layer
def __exit__(self, ex_type, ex_value, traceback):
if ex_type is None:
if not self.layer.commitChanges():
raise QgsEditError(self.layer.commitErrors())
return True
else:
self.layer.rollBack()
return False
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