Cyclic0007/python-markdownify
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use compiled regex for escaping patterns (#194)

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Signed-off-by: chrispy <chrispy@synopsys.com>
This commit is contained in:
Chris Papademetrious
2025-02-24 12:29:09 -05:00
committed by GitHub
parent 6984dca7ab
commit ba5e222b45
1 changed files with 29 additions and 16 deletions
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45
markdownify/__init__.py
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@@ -4,16 +4,38 @@ import re
import six
# General-purpose regex patterns
re_convert_heading = re.compile(r'convert_h(\d+)')
re_line_with_content = re.compile(r'^(.*)', flags=re.MULTILINE)
re_whitespace = re.compile(r'[\t ]+')
re_all_whitespace = re.compile(r'[\t \r\n]+')
re_newline_whitespace = re.compile(r'[\t \r\n]*[\r\n][\t \r\n]*')
re_html_heading = re.compile(r'h(\d+)')
# extract (leading_nl, content, trailing_nl) from a string
# Pattern for creating convert_<tag> function names from tag names
re_make_convert_fn_name = re.compile(r'[\[\]:-]')
# Extract (leading_nl, content, trailing_nl) from a string
# (functionally equivalent to r'^(\n*)(.*?)(\n*)$', but greedy is faster than reluctant here)
re_extract_newlines = re.compile(r'^(\n*)((?:.*[^\n])?)(\n*)$', flags=re.DOTALL)
# Escape miscellaneous special Markdown characters
re_escape_misc_chars = re.compile(r'([]\\&<`[>~=+|])')
# Escape sequence of one or more consecutive '-', preceded
# and followed by whitespace or start/end of fragment, as it
# might be confused with an underline of a header, or with a
# list marker
re_escape_misc_dash_sequences = re.compile(r'(\s|^)(-+(?:\s|$))')
# Escape sequence of up to six consecutive '#', preceded
# and followed by whitespace or start/end of fragment, as
# it might be confused with an ATX heading
re_escape_misc_hashes = re.compile(r'(\s|^)(#{1,6}(?:\s|$))')
# Escape '.' or ')' preceded by up to nine digits, as it might be
# confused with a list item
re_escape_misc_list_items = re.compile(r'((?:\s|^)[0-9]{1,9})([.)](?:\s|$))')
# Heading styles
ATX = 'atx'
@@ -346,7 +368,7 @@ class MarkdownConverter(object):
return lambda el, text, parent_tags: self._convert_hn(n, el, text, parent_tags)
# For other tags, look up their conversion function by tag name
convert_fn_name = "convert_%s" % re.sub(r"[\[\]:-]", "_", tag_name)
convert_fn_name = "convert_%s" % re_make_convert_fn_name.sub('_', tag_name)
convert_fn = getattr(self, convert_fn_name, None)
return convert_fn
@@ -365,20 +387,11 @@ class MarkdownConverter(object):
if not text:
return ''
if self.options['escape_misc']:
text = re.sub(r'([]\\&<`[>~=+|])', r'\\\1', text)
# A sequence of one or more consecutive '-', preceded and
# followed by whitespace or start/end of fragment, might
# be confused with an underline of a header, or with a
# list marker.
text = re.sub(r'(\s|^)(-+(?:\s|$))', r'\1\\\2', text)
# A sequence of up to six consecutive '#', preceded and
# followed by whitespace or start/end of fragment, might
# be confused with an ATX heading.
text = re.sub(r'(\s|^)(#{1,6}(?:\s|$))', r'\1\\\2', text)
# '.' or ')' preceded by up to nine digits might be
# confused with a list item.
text = re.sub(r'((?:\s|^)[0-9]{1,9})([.)](?:\s|$))', r'\1\\\2',
text)
text = re_escape_misc_chars.sub(r'\\\1', text)
text = re_escape_misc_dash_sequences.sub(r'\1\\\2', text)
text = re_escape_misc_hashes.sub(r'\1\\\2', text)
text = re_escape_misc_list_items.sub(r'\1\\\2', text)
if self.options['escape_asterisks']:
text = text.replace('*', r'\*')
if self.options['escape_underscores']: