/usr/lib/python3/dist-packages/tinycss/tokenizer.py is in python3-tinycss 0.4-1build1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 | # coding: utf-8
"""
tinycss.tokenizer
-----------------
Tokenizer for the CSS core syntax:
http://www.w3.org/TR/CSS21/syndata.html#tokenization
This is the pure-python implementation. See also speedups.pyx
:copyright: (c) 2012 by Simon Sapin.
:license: BSD, see LICENSE for more details.
"""
from __future__ import unicode_literals
from . import token_data
def tokenize_flat(
css_source, ignore_comments=True,
# Make these local variable to avoid global lookups in the loop
tokens_dispatch=token_data.TOKEN_DISPATCH,
unicode_unescape=token_data.UNICODE_UNESCAPE,
newline_unescape=token_data.NEWLINE_UNESCAPE,
simple_unescape=token_data.SIMPLE_UNESCAPE,
find_newlines=token_data.FIND_NEWLINES,
Token=token_data.Token,
len=len,
int=int,
float=float,
list=list,
_None=None):
"""
:param css_source:
CSS as an unicode string
:param ignore_comments:
if true (the default) comments will not be included in the
return value
:return:
An iterator of :class:`Token`
"""
pos = 0
line = 1
column = 1
source_len = len(css_source)
tokens = []
while pos < source_len:
char = css_source[pos]
if char in ':;{}()[]':
type_ = char
css_value = char
else:
codepoint = min(ord(char), 160)
for _index, type_, regexp in tokens_dispatch[codepoint]:
match = regexp(css_source, pos)
if match:
# First match is the longest. See comments on TOKENS above.
css_value = match.group()
break
else:
# No match.
# "Any other character not matched by the above rules,
# and neither a single nor a double quote."
# ... but quotes at the start of a token are always matched
# by STRING or BAD_STRING. So DELIM is any single character.
type_ = 'DELIM'
css_value = char
length = len(css_value)
next_pos = pos + length
# A BAD_COMMENT is a comment at EOF. Ignore it too.
if not (ignore_comments and type_ in ('COMMENT', 'BAD_COMMENT')):
# Parse numbers, extract strings and URIs, unescape
unit = _None
if type_ == 'DIMENSION':
value = match.group(1)
value = float(value) if '.' in value else int(value)
unit = match.group(2)
unit = simple_unescape(unit)
unit = unicode_unescape(unit)
unit = unit.lower() # normalize
elif type_ == 'PERCENTAGE':
value = css_value[:-1]
value = float(value) if '.' in value else int(value)
unit = '%'
elif type_ == 'NUMBER':
value = css_value
if '.' in value:
value = float(value)
else:
value = int(value)
type_ = 'INTEGER'
elif type_ in ('IDENT', 'ATKEYWORD', 'HASH', 'FUNCTION'):
value = simple_unescape(css_value)
value = unicode_unescape(value)
elif type_ == 'URI':
value = match.group(1)
if value and value[0] in '"\'':
value = value[1:-1] # Remove quotes
value = newline_unescape(value)
value = simple_unescape(value)
value = unicode_unescape(value)
elif type_ == 'STRING':
value = css_value[1:-1] # Remove quotes
value = newline_unescape(value)
value = simple_unescape(value)
value = unicode_unescape(value)
# BAD_STRING can only be one of:
# * Unclosed string at the end of the stylesheet:
# Close the string, but this is not an error.
# Make it a "good" STRING token.
# * Unclosed string at the (unescaped) end of the line:
# Close the string, but this is an error.
# Leave it as a BAD_STRING, don’t bother parsing it.
# See http://www.w3.org/TR/CSS21/syndata.html#parsing-errors
elif type_ == 'BAD_STRING' and next_pos == source_len:
type_ = 'STRING'
value = css_value[1:] # Remove quote
value = newline_unescape(value)
value = simple_unescape(value)
value = unicode_unescape(value)
else:
value = css_value
tokens.append(Token(type_, css_value, value, unit, line, column))
pos = next_pos
newlines = list(find_newlines(css_value))
if newlines:
line += len(newlines)
# Add 1 to have lines start at column 1, not 0
column = length - newlines[-1].end() + 1
else:
column += length
return tokens
def regroup(tokens):
"""
Match pairs of tokens: () [] {} function()
(Strings in "" or '' are taken care of by the tokenizer.)
Opening tokens are replaced by a :class:`ContainerToken`.
Closing tokens are removed. Unmatched closing tokens are invalid
but left as-is. All nested structures that are still open at
the end of the stylesheet are implicitly closed.
:param tokens:
a *flat* iterable of tokens, as returned by :func:`tokenize_flat`.
:return:
A tree of tokens.
"""
# "global" objects for the inner recursion
pairs = {'FUNCTION': ')', '(': ')', '[': ']', '{': '}'}
tokens = iter(tokens)
eof = [False]
def _regroup_inner(stop_at=None, tokens=tokens, pairs=pairs, eof=eof,
ContainerToken=token_data.ContainerToken,
FunctionToken=token_data.FunctionToken):
for token in tokens:
type_ = token.type
if type_ == stop_at:
return
end = pairs.get(type_)
if end is None:
yield token # Not a grouping token
else:
assert not isinstance(token, ContainerToken), (
'Token looks already grouped: {0}'.format(token))
content = list(_regroup_inner(end))
if eof[0]:
end = '' # Implicit end of structure at EOF.
if type_ == 'FUNCTION':
yield FunctionToken(token.type, token.as_css(), end,
token.value, content,
token.line, token.column)
else:
yield ContainerToken(token.type, token.as_css(), end,
content,
token.line, token.column)
else:
eof[0] = True # end of file/stylesheet
return _regroup_inner()
def tokenize_grouped(css_source, ignore_comments=True):
"""
:param css_source:
CSS as an unicode string
:param ignore_comments:
if true (the default) comments will not be included in the
return value
:return:
An iterator of :class:`Token`
"""
return regroup(tokenize_flat(css_source, ignore_comments))
# Optional Cython version of tokenize_flat
# Make both versions available with explicit names for tests.
python_tokenize_flat = tokenize_flat
try:
from . import speedups
except ImportError:
cython_tokenize_flat = None
else:
cython_tokenize_flat = speedups.tokenize_flat
# Default to the Cython version if available
tokenize_flat = cython_tokenize_flat
|