Wrong equation direction in display math Cases and Array environment (with bidi=basic option)

[jalilsadati]

In the previous version of Babel with

\makeatletter
\everymath{\let\bbl@mathboxdir@aux\@gobble}
\makeatother

Inline and display math for Cases, Array, and Tabular was correct, but in V3.71, Display math for Cases and Array has wrong direction again!

\documentclass{article}
\usepackage{amsmath}
\usepackage[bidi=basic]{babel}
\babelprovide[import,main]{arabic}

%\makeatletter
%\everymath{\let\bbl@mathboxdir@aux\@gobble}
%\makeatother

\begin{document}

    \[ f=
    \begin{cases}
        A_{1}^2 & \text{if}\quad x>0 \\
        B_{1}^2 & \text{if}\quad x<0
    \end{cases}\]

    $ f=
    \begin{cases}
        A_{1}^2 & \text{if}\quad x>0 \\
        B_{1}^2 & \text{if}\quad x<0
    \end{cases} $

    \[f=\left\{
    \begin{array}{ll}
        A_{1}^2 & \text{if}\quad x>0 \\
        B_{1}^2 & \text{if}\quad x<0
    \end{array}
    \right.\]

    $ f=\left\{
    \begin{array}{ll}
        A_{1}^2 & \text{if}\quad x>0 \\
        B_{1}^2 & \text{if}\quad x<0
    \end{array}
    \right. $

    \begin{tabular}{ll}
        $ a+b+c $ &  $ a+b+c $ \\
        $ a $ & $ d $
    \end{tabular}

\end{document}

[jbezos]

😣😣 Every time a direction gets fixed, another direction gets broken.

I promise nothing, but try with:

\makeatletter
\def\bbl@everydisplay{\def\bbl@insidemath{2}}
\makeatother

I think that with the mechanism I’ve started to implement (partly based on direct node processing with lua), I’ll manage to provide the definitive solution, but I’m still working on it.

[jbezos]

Fixed in 3.73.