37 lines
1.1 KiB
Python
37 lines
1.1 KiB
Python
""" Parse CSS identifiers. More complicated than it sounds"""
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from pyparsing import Word, Literal, Regex, Combine, Optional, White, oneOf, ZeroOrMore
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import string
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import re
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class White(White):
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""" Customize whitespace to match the CSS spec values"""
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def __init__(self, ws=" \t\r\n\f", min=1, max=0, exact=0):
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super(White, self).__init__(ws, min, max, exact)
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escaped = (
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Literal("\\").suppress() +
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#chr(20)-chr(126) + chr(128)-unichr(sys.maxunicode)
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Regex(u"[\u0020-\u007e\u0080-\uffff]", re.IGNORECASE)
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)
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def convertToUnicode(t):
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return unichr(int(t[0], 16))
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hex_unicode = (
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Literal("\\").suppress() +
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Regex("[0-9a-f]{1,6}", re.IGNORECASE) +
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Optional(White(exact=1)).suppress()
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).setParseAction(convertToUnicode)
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escape = hex_unicode | escaped
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#any unicode literal outside the 0-127 ascii range
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nonascii = Regex(u"[^\u0000-\u007f]")
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#single character for starting an identifier.
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nmstart = Regex(u"[A-Z]", re.IGNORECASE) | nonascii | escape
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nmchar = Regex(u"[0-9A-Z-]", re.IGNORECASE) | nonascii | escape
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identifier = Combine(nmstart + ZeroOrMore(nmchar)) |