#
# Copyright (C) 2019 Thomas Holder
#
# 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.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
#
# pylint: disable=too-few-public-methods
#
"""
Comparison filters for use with the ComparisonMixin.
Each filter should be initialised in the list of
filters that are being used.
compare_filters = [
CompareNumericFuzzy(),
CompareOrderIndependentLines(option=yes),
]
"""
import re
[docs]class Compare(object):
"""
Comparison base class, this acts as a passthrough unless
the filter staticmethod is overwritten.
"""
def __init__(self, **options):
self.options = options
def __call__(self, content):
return self.filter(content)
[docs] @staticmethod
def filter(contents):
"""Replace this filter method with your own filtering"""
return contents
[docs]class CompareNumericFuzzy(Compare):
"""
Turn all numbers into shorter standard formats
1.2345678 -> 1.2346
1.2300 -> 1.23, 50.0000 -> 50.0
50.0 -> 50
"""
[docs] @staticmethod
def filter(contents):
func = lambda m: b'%.3f' % (float(m.group(0)))
contents = re.sub(br'\d+\.\d+', func, contents)
contents = re.sub(br'(\d\.\d+?)0+\b', br'\1', contents)
contents = re.sub(br'(\d)\.0+(?=\D|\b)', br'\1', contents)
return contents
[docs]class CompareWithoutIds(Compare):
"""Remove all ids from the svg"""
[docs] @staticmethod
def filter(contents):
return re.sub(br' id="([^"]*)"', b'', contents)
[docs]class CompareWithPathSpace(Compare):
"""Make sure that path segment commands have spaces around them"""
[docs] @staticmethod
def filter(contents):
def func(match):
"""We've found a path command, process it"""
new = re.sub(br'\s*([LZMHVCSQTAatqscvhmzl])\s*', br' \1 ', match.group(1))
return b' d="' + new.replace(b',', b' ') + b'"'
return re.sub(br' d="([^"]*)"', func, contents)
[docs]class CompareSize(Compare):
"""Compare the length of the contents instead of the contents"""
[docs] @staticmethod
def filter(contents):
return len(contents)
[docs]class CompareOrderIndependentBytes(Compare):
"""Take all the bytes and sort them"""
[docs] @staticmethod
def filter(contents):
return b"".join([bytes(i) for i in sorted(contents)])
[docs]class CompareOrderIndependentLines(Compare):
"""Take all the lines and sort them"""
[docs] @staticmethod
def filter(contents):
return b"\n".join(sorted(contents.splitlines()))
[docs]class CompareOrderIndependentStyle(Compare):
"""Take all styles and sort the results"""
[docs] @staticmethod
def filter(contents):
contents = CompareNumericFuzzy.filter(contents)
def func(match):
"""Search and replace function for sorting"""
sty = b';'.join(sorted(match.group(1).split(b';')))
return b'style="%s"' % (sty,)
return re.sub(br'style="([^"]*)"', func, contents)
[docs]class CompareOrderIndependentStyleAndPath(Compare):
"""Take all styles and paths and sort them both"""
[docs] @staticmethod
def filter(contents):
contents = CompareOrderIndependentStyle.filter(contents)
def func(match):
"""Search and replace function for sorting"""
path = b'X'.join(sorted(re.split(br'[A-Z]', match.group(1))))
return b'd="%s"' % (path,)
return re.sub(br'\bd="([^"]*)"', func, contents)