/usr/lib/python3/dist-packages/cairosvg/features.py is in python3-cairosvg 1.0.20-1.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 | # -*- coding: utf-8 -*-
# This file is part of CairoSVG
# Copyright © 2010-2012 Kozea
#
# This library is free software: you can redistribute it and/or modify it under
# the terms of the GNU Lesser General Public License as published by the Free
# Software Foundation, either version 3 of the License, or (at your option) any
# later version.
#
# This library 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 Lesser General Public License for more
# details.
#
# You should have received a copy of the GNU Lesser General Public License
# along with CairoSVG. If not, see <http://www.gnu.org/licenses/>.
"""
Helpers related to SVG conditional processing.
"""
import locale
ROOT = "http://www.w3.org/TR/SVG11/feature"
LOCALE = locale.getdefaultlocale()[0] or ""
SUPPORTED_FEATURES = set(
ROOT + "#" + feature for feature in [
"SVG",
"SVG-static",
"CoreAttribute",
"Structure",
"BasicStructure",
"ConditionalProcessing",
"Image",
"Style",
"ViewportAttribute",
"Shape",
"BasicText",
"BasicPaintAttribute",
"OpacityAttribute",
"BasicGraphicsAttribute",
"Marker",
"Gradient",
"Pattern",
"Clip",
"BasicClip",
"Mask"
])
def has_features(features):
"""Check whether ``features`` are supported by CairoSVG."""
return SUPPORTED_FEATURES >= set(features.strip().split(" "))
def support_languages(languages):
"""Check whether one of ``languages`` is part of the user locales."""
for language in languages.split(","):
language = language.strip()
if language and LOCALE.startswith(language):
return True
return False
def match_features(node):
"""Check the node match the conditional processing attributes."""
features = node.attrib.get("requiredFeatures")
languages = node.attrib.get("systemLanguage")
if "requiredExtensions" in node.attrib:
return False
if features is not None and not has_features(features):
return False
if languages is not None and not support_languages(languages):
return False
return True
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