118 lines
3.6 KiB
Python
118 lines
3.6 KiB
Python
#! /usr/bin/env python
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# -*- coding: utf-8 -*-
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# copyright 2014 Hamilton Kibbe <ham@hamiltonkib.be>
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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# http://www.apache.org/licenses/LICENSE-2.0
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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"""
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gerber.cnc
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============
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**CNC file classes**
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This module provides common base classes for Excellon/Gerber CNC files
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"""
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class FileSettings(object):
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""" CNC File Settings
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Provides a common representation of gerber/excellon file settings
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"""
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def __init__(self, notation='absolute', units='inch',
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zero_suppression='trailing', format=(2, 5)):
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if notation not in ['absolute', 'incremental']:
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raise ValueError('Notation must be either absolute or incremental')
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self.notation = notation
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if units not in ['inch', 'metric']:
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raise ValueError('Units must be either inch or metric')
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self.units = units
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if zero_suppression not in ['leading', 'trailing']:
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raise ValueError('Zero suppression must be either leading or \
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trailling')
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self.zero_suppression = zero_suppression
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if len(format) != 2:
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raise ValueError('Format must be a tuple(n=2) of integers')
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self.format = format
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def __getitem__(self, key):
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if key == 'notation':
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return self.notation
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elif key == 'units':
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return self.units
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elif key == 'zero_suppression':
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return self.zero_suppression
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elif key == 'format':
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return self.format
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else:
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raise KeyError()
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class CncFile(object):
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""" Base class for Gerber/Excellon files.
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Provides a common set of settings parameters.
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Parameters
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----------
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settings : FileSettings
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The current file configuration.
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filename : string
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Name of the file that this CncFile represents.
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Attributes
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----------
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settings : FileSettings
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File settings as a FileSettings object
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notation : string
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File notation setting. May be either 'absolute' or 'incremental'
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units : string
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File units setting. May be 'inch' or 'metric'
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zero_suppression : string
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File zero-suppression setting. May be either 'leading' or 'trailling'
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format : tuple (<int>, <int>)
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File decimal representation format as a tuple of (integer digits,
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decimal digits)
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"""
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def __init__(self, settings=None, filename=None):
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if settings is not None:
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self.notation = settings['notation']
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self.units = settings['units']
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self.zero_suppression = settings['zero_suppression']
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self.format = settings['format']
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else:
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self.notation = 'absolute'
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self.units = 'inch'
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self.zero_suppression = 'trailing'
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self.format = (2, 5)
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self.filename = filename
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@property
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def settings(self):
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""" File settings
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Returns
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-------
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settings : FileSettings (dict-like)
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A FileSettings object with the specified configuration.
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"""
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return FileSettings(self.notation, self.units, self.zero_suppression,
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self.format)
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