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85 lines
2.9 KiB
Python
85 lines
2.9 KiB
Python
# -*- coding: utf-8 -*-
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#
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# Copyright © 2010 Eugeniy Meshcheryakov <eugen@debian.org>
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU Lesser General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU Lesser General Public License for more details.
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#
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# You should have received a copy of the GNU Lesser General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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"""
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:mod:`gdsii.structure` --- interface to a GDSII structure
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=========================================================
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This module contains class that represents a GDSII structure.
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.. moduleauthor:: Eugeniy Meshcheryakov <eugen@debian.org>
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"""
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from __future__ import absolute_import
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from . import elements, record, tags, _records
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from datetime import datetime
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_STRNAME = _records.StringRecord('name', tags.STRNAME)
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_BGNSTR = _records.TimestampsRecord('mod_time', 'acc_time', tags.BGNSTR)
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_STRCLASS = _records.SimpleOptionalRecord('strclass', tags.STRCLASS)
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class Structure(list):
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"""
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GDSII structure class. This class is derived for :class:`list` and can
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contain one or more elements from :mod:`gdsii.elements`.
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GDS syntax for the structure:
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.. productionlist::
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structure: BGNSTR
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: STRNAME
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: [STRCLASS]
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: {`element`}*
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: ENDSTR
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"""
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_gds_objs = (_BGNSTR, _STRNAME, _STRCLASS)
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def __init__(self, name, mod_time=None, acc_time=None):
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"""
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Initialize the structure.
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`mod_time` and `acc_time` are set to current UTC time by default.
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"""
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list.__init__(self)
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self.name = name
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self.mod_time = mod_time if mod_time is not None else datetime.utcnow()
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self.acc_time = acc_time if acc_time is not None else datetime.utcnow()
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def _init_optional(self):
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"""Initialize optional attributes to None."""
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self.strclass = None
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@classmethod
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def _load(cls, gen):
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self = cls.__new__(cls)
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list.__init__(self)
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self._init_optional()
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for obj in self._gds_objs:
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obj.read(self, gen)
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# read elements till ENDSTR
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while gen.current.tag != tags.ENDSTR:
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self.append(elements._Base._load(gen))
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return self
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def _save(self, stream):
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for obj in self._gds_objs:
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obj.save(self, stream)
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for elem in self:
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elem._save(stream)
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record.Record(tags.ENDSTR).save(stream)
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def __repr__(self):
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return '<Structure: %s>' % self.name.decode()
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