Mercurial > repos > shellac > sam_consensus_v3
annotate env/lib/python3.9/site-packages/bleach/_vendor/html5lib/filters/whitespace.py @ 0:4f3585e2f14b draft default tip
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
author | shellac |
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date | Mon, 22 Mar 2021 18:12:50 +0000 |
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1 from __future__ import absolute_import, division, unicode_literals |
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2 |
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3 import re |
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4 |
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5 from . import base |
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6 from ..constants import rcdataElements, spaceCharacters |
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7 spaceCharacters = "".join(spaceCharacters) |
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8 |
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9 SPACES_REGEX = re.compile("[%s]+" % spaceCharacters) |
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10 |
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11 |
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12 class Filter(base.Filter): |
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13 """Collapses whitespace except in pre, textarea, and script elements""" |
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14 spacePreserveElements = frozenset(["pre", "textarea"] + list(rcdataElements)) |
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15 |
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16 def __iter__(self): |
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17 preserve = 0 |
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18 for token in base.Filter.__iter__(self): |
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19 type = token["type"] |
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20 if type == "StartTag" \ |
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21 and (preserve or token["name"] in self.spacePreserveElements): |
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22 preserve += 1 |
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23 |
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24 elif type == "EndTag" and preserve: |
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25 preserve -= 1 |
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26 |
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27 elif not preserve and type == "SpaceCharacters" and token["data"]: |
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28 # Test on token["data"] above to not introduce spaces where there were not |
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29 token["data"] = " " |
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30 |
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31 elif not preserve and type == "Characters": |
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32 token["data"] = collapse_spaces(token["data"]) |
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33 |
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34 yield token |
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35 |
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36 |
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37 def collapse_spaces(text): |
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38 return SPACES_REGEX.sub(' ', text) |