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Fix double nested math parsing #2807

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Merged
facelessuser merged 1 commit into from
Dec 14, 2025
Merged

Fix double nested math parsing #2807

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5 changes: 5 additions & 0 deletions docs/src/markdown/about/changelog.md
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Expand Up @@ -3,6 +3,11 @@ icon: lucide/scroll-text
---
# Changelog

## 10.19.1

- **FIX**: Arithmatex: Fix issue where block `$$` math used inline within a paragraph could result in nested math
parsing.

## 10.19

- **NEW**: Emoji: Update Twemoji to use Unicode 16.
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2 changes: 1 addition & 1 deletion pymdownx/__meta__.py
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Expand Up @@ -193,5 +193,5 @@ def parse_version(ver: str) -> Version:
return Version(major, minor, micro, release, pre, post, dev)


__version_info__ = Version(10, 19, 0, "final")
__version_info__ = Version(10, 19, 1, "final")
__version__ = __version_info__._get_canonical()
6 changes: 3 additions & 3 deletions pymdownx/arithmatex.py
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Expand Up @@ -51,9 +51,9 @@
from . import util
import re

RE_SMART_DOLLAR_INLINE = r'(?:(?<!\\)((?:\\{2})+)(?=\$)|(?<!\\)(\$)(?!\s)((?:\\.|[^\\$])+?)(?<!\s)(?:\$))'
RE_DOLLAR_INLINE = r'(?:(?<!\\)((?:\\{2})+)(?=\$)|(?<!\\)(\$)((?:\\.|[^\\$])+?)(?:\$))'
RE_BRACKET_INLINE = r'(?:(?<!\\)((?:\\{2})+?)(?=\\\()|(?<!\\)(\\\()((?:\\[^)]|[^\\])+?)(?:\\\)))'
RE_SMART_DOLLAR_INLINE = r'(?:(?<!\\)((?:\\{2})+)(?=\$)|(?<!\\)(\$)(?!\s)((?:\\.|[^\\$\x02\x03])+?)(?<!\s)(?:\$))'
RE_DOLLAR_INLINE = r'(?:(?<!\\)((?:\\{2})+)(?=\$)|(?<!\\)(\$)((?:\\.|[^\\$\x02\x03])+?)(?:\$))'
RE_BRACKET_INLINE = r'(?:(?<!\\)((?:\\{2})+?)(?=\\\()|(?<!\\)(\\\()((?:\\[^)]|[^\\\x02\x03])+?)(?:\\\)))'

RE_DOLLAR_BLOCK = r'(?P<dollar>[$]{2})(?P<math>((?:\\.|[^\\])+?))(?P=dollar)'
RE_TEX_BLOCK = r'(?P<math2>\\begin\{(?P<env>[a-z]+\*?)\}(?:\\.|[^\\])+?\\end\{(?P=env)\})'
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13 changes: 11 additions & 2 deletions tests/test_extensions/test_arithmatex.py
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Expand Up @@ -149,9 +149,18 @@ def test_double_escaped_bracket_block(self):
True
)

def test_nested_inline_dollar(self):
"""Test nested inline dollar."""

class TestArithmatexHang(util.MdCase):
"""Test hang cases."""
self.check_markdown(
R'''
a $$x$$ b
''',
R'''
<p>a $<span class="arithmatex"><span class="MathJax_Preview">x</span><script type="math/tex">x</script></span>$ b</p>
''', # noqa: E501
True
)

def test_hang_dollar(self):
"""
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