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e�d��Ze�d��Ze�d��Ze�d��Ze�d��Ze�d��Ze�d��Zd�d�dƄZd�d�dɄZdS )�u( Inline LaTeX-math normalization for article HTML.
AI-generated article bodies occasionally wrap short formulas in TeX math
delimiters, e.g. ``$$\nabla_\text{rad} > \nabla_\text{ad}$$``. The shared
``MarkdownIt`` parser (commonmark) has no math plugin and the WordPress themes
load no MathJax/KaTeX, so the raw TeX survives rendering and leaks onto the
published page as literal ``$$...$$`` text.
`convert_math` runs on the *final* HTML (after markdown rendering, like
`normalize_citations`) and rewrites the small subset of TeX these articles use
into plain Unicode + ``<sub>``/``<sup>`` markup that renders everywhere with no
front-end dependency:
$$\nabla_\text{rad} > \nabla_\text{ad}$$
-> <span class="tsai-math">∇<sub>rad</sub> > ∇<sub>ad</sub></span>
It is a best-effort transform: constructs it does not recognize degrade to
cleaned-up text (delimiters and backslashes stripped) rather than raw TeX. It
is idempotent — once the ``$``-delimiters are gone there is nothing left to
match — so it is safe to re-run on its own output.
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d �}t �d d|�� � }|S ) zBTranslate a single TeX math fragment (delimiters already removed).� z\1/\2�{c S s t | �d� S )N� )�_SYMBOLS�group��m� rU �(/tsai/repo/api/app/utilities/math_tex.py�<lambda>\ s z _convert_tex.<locals>.<lambda>z
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_LEFTOVER_CMD�replace�re�strip)rK �srU rU rV � _convert_texV s rh �htmlc C s@ | rd| vr| S d dd�}d dd �}t �|| �} t�|| �} | S ) a� Rewrite TeX math spans in ``html`` to Unicode + ``<sub>``/``<sup>`` markup.
Handles display ``$$...$$`` and inline ``$...$`` delimiters. Inline spans are
only converted when they actually look like math (contain a backslash, brace,
or sub/superscript) so ordinary prose with currency amounts is left alone.
Idempotent and safe to run on HTML that contains no math.
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