[Dev-luatex] missing displacement when leqno is used in rtl paragraph

30 Jan 2025

      Hello,

I think that displacement of a the of a math display
is missing when \leqno is used in RTL paragraph.

I attached a patch. Here is a simple test code (it requires the cmr10 font):

\catcode`\{=1\catcode`\}=2\catcode`\$=3
\directlua{tex.enableprimitives("",{"pardirection", "textdirection",
"Umathquad"})}

\tracingoutput=1\tracingonline=1
\showboxbreadth 16384 \showboxdepth 16384

\font\tenrm=cmr10
\textfont0=\tenrm

\hsize=345pt\vsize=550pt\parfillskip=0.0pt plus 1.0fil
\parindent=15pt\parskip=0pt plus1pt
\Umathquad\textstyle=10pt

\pardirection=1\textdirection=1
$$1 \leqno(1)$$

\end

Udi

[Dev-luatex] missing displacement when leqno is used in rtl paragraph

Udicoudco