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Add initial label formatting w/ datetime support
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| # -*- coding: utf-8 -*- | ||
| from __future__ import absolute_import, division, print_function, unicode_literals | ||
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| # The MIT License | ||
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| # Copyright (c) 2017 Tammo Ippen, tammo.ippen@posteo.de | ||
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| # Permission is hereby granted, free of charge, to any person obtaining a copy | ||
| # of this software and associated documentation files (the "Software"), to deal | ||
| # in the Software without restriction, including without limitation the rights | ||
| # to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | ||
| # copies of the Software, and to permit persons to whom the Software is | ||
| # furnished to do so, subject to the following conditions: | ||
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| # The above copyright notice and this permission notice shall be included in | ||
| # all copies or substantial portions of the Software. | ||
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| # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | ||
| # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | ||
| # FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | ||
| # AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | ||
| # LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | ||
| # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN | ||
| # THE SOFTWARE. | ||
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| from collections import OrderedDict | ||
| from datetime import datetime, timedelta | ||
| import math | ||
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| import six | ||
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| class InputFormatter(object): | ||
| def __init__(self): | ||
| self.formatters = OrderedDict() | ||
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| self.formatters[float] = _num_formatter | ||
| for int_type in six.integer_types: | ||
| self.formatters[int_type] = _num_formatter | ||
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| self.formatters[datetime] = _datetime_formatter | ||
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| self.converters = OrderedDict() | ||
| self.converters[float] = _convert_numbers | ||
| for int_type in six.integer_types: | ||
| self.converters[int_type] = _convert_numbers | ||
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| self.converters[datetime] = _convert_datetime | ||
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| def register_formatter(self, t, f): | ||
| self.formatters[t] = f | ||
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| def register_converter(self, t, f): | ||
| self.converters[t] = f | ||
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| def fmt(self, val, delta, left=False, chars=9): | ||
| for t, f in reversed(self.formatters.items()): | ||
| if isinstance(val, t): | ||
| return f(val, chars=chars, delta=delta, left=left) | ||
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| return str(val) | ||
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| def convert(self, val): | ||
| for t, f in reversed(self.converters.items()): | ||
| if isinstance(val, t): | ||
| return f(val) | ||
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| return val | ||
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| def _datetime_formatter(val, chars, delta, left=False): | ||
| assert isinstance(val, datetime) | ||
| assert isinstance(delta, timedelta) | ||
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| if chars < 8: | ||
| raise ValueError('Not possible to display value "{}" with {} characters!'.format(val, chars)) | ||
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| res = '' | ||
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| if delta.days <= 0: | ||
| # make time representation | ||
| if 8 <= chars < 15: | ||
| res = '{:02d}:{:02d}:{:02d}'.format(val.hour, val.minute, val.second) | ||
| elif 15 <= chars: | ||
| res = '{:02d}:{:02d}:{:02d}.{:06d}'.format(val.hour, val.minute, val.second, val.microsecond) | ||
| elif 1 <= delta.days <= 10: | ||
| # make day / time representation | ||
| if 8 <= chars < 11: | ||
| res = '{:02d}T{:02d}:{:02d}'.format(val.day, val.hour, val.minute) | ||
| elif 11 <= chars: | ||
| res = '{:02d}T{:02d}:{:02d}:{:02d}'.format(val.day, val.hour, val.minute, val.second) | ||
| else: | ||
| # make date representation | ||
| if 8 <= chars < 10: | ||
| res = '{:02d}-{:02d}-{:02d}'.format(val.year % 100, val.month, val.day) | ||
| elif 10 <= chars: | ||
| res = '{:04d}-{:02d}-{:02d}'.format(val.year, val.month, val.day) | ||
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| if left: | ||
| return res.ljust(chars) | ||
| else: | ||
| return res.rjust(chars) | ||
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| def _num_formatter(val, chars, delta, left=False): | ||
| if isinstance(val, float) and val.is_integer(): | ||
| val = int(val) | ||
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| if isinstance(val, six.integer_types): | ||
| return _int_formatter(val, chars, left) | ||
| elif isinstance(val, float): | ||
| return _float_formatter(val, chars, left) | ||
| else: | ||
| raise ValueError('Only accepting numeric (int/long/float) types, not "{}" of type: {}'.format(val, type(val))) | ||
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| def _float_formatter(val, chars, left=False): | ||
| assert isinstance(val, float) | ||
| if abs(val) == math.inf: | ||
| return str(val).ljust(chars) if left else str(val).rjust(chars) | ||
| sign = int(val < 0) | ||
| order = math.log10(abs(val)) | ||
| align = '<' if left else '' | ||
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| if order >= 0: | ||
| # larger than 1 values or smaller than -1 | ||
| digits = math.ceil(order) | ||
| fractionals = max(0, chars - 1 - digits - sign) | ||
| if digits + sign > chars: | ||
| return _large_pos(val, chars, left, digits, sign) | ||
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| return '{:{}{}.{}f}'.format(val, align, chars, fractionals) | ||
| else: | ||
| # between -1 and 1 values | ||
| order = abs(math.floor(order)) | ||
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| if order > 4: # e-04 4 digits | ||
| exp_digits = max(2, math.ceil(math.log10(order))) | ||
| exp_digits += 2 # the - sign and the e | ||
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| return '{:{}{}.{}e}'.format(val, align, chars, chars - exp_digits - 2 - sign) | ||
| else: | ||
| return '{:{}{}.{}f}'.format(val, align, chars, chars - 2 - sign) | ||
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| def _int_formatter(val, chars, left=False): | ||
| assert isinstance(val, six.integer_types) | ||
| if val != 0: | ||
| sign = int(val < 0) | ||
| digits = math.ceil(math.log10(abs(val))) | ||
| if digits + sign > chars: | ||
| return _large_pos(val, chars, left, digits, sign) | ||
| align = '<' if left else '' | ||
| return '{:{}{}d}'.format(val, align, chars) | ||
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| def _large_pos(val, chars, left, digits, sign): | ||
| align = '<' if left else '' | ||
| # exponent is always + and has at least two digits (1.3e+06) | ||
| exp_digits = max(2, math.ceil(math.log10(digits))) | ||
| exp_digits += 2 # the + sign and the e | ||
| front_digits = chars - exp_digits - sign | ||
| residual_digits = max(0, front_digits - 2) | ||
| if front_digits < 1: | ||
| raise ValueError('Not possible to display value "{}" with {} characters!'.format(val, chars)) | ||
| return '{:{}{}.{}e}'.format(val, align, chars, residual_digits) | ||
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| def _convert_numbers(v): | ||
| assert isinstance(v, float) or isinstance(v, six.integer_types) | ||
| return float(v) | ||
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| def _convert_datetime(v): | ||
| assert isinstance(v, datetime) | ||
| return v.timestamp() |