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

30 Jan 2025

      On Thu, Jan 30, 2025 at 6:35 PM luigi scarso  wrote:
...
On Thu, 30 Jan 2025 at 17:29, Udicoudco  wrote:
...
I think that displacement of a the of a math display
is missing when \leqno is used in RTL paragraph.
I attached a patch.
Ok, I will check it asap.
Luigi, after testing all the branches it seems there are
a couple more that should be fixed. Sorry for not checking
that before.

I attached a new patch (to be applied on the current master, not on
top of the last one).
I have tested all the branches with the following:

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

\font\tenrm=cmr10
\textfont0=\tenrm
\tenrm

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

\mathdirection=0
(l)=true swapdir=true mathdir=TLT
$$\predisplaydirection=-1 1 \eqno(1)$$

\mathdirection1
(l)=true swapdir=true mathdir=TRT
$$\predisplaydirection=-1 1 \eqno(1)$$

\mathdirection=0
(l)=true swapdir=false mathdir=TLT
$$\predisplaydirection=0 1 \leqno(1)$$

\mathdirection1
(l)=true swapdir=false mathdir=TRT
$$\predisplaydirection=0 1 \leqno(1)$$

\mathdirection=0
(l)=false swapdir=true mathdir=TLT
$$\predisplaydirection=-1 1 \leqno(1)$$

\mathdirection1
(l)=false swapdir=true mathdir=TRT
$$\predisplaydirection=-1 1 \leqno(1)$$

\mathdirection=0
(l)=false swapdir=false mathdir=TLT
$$\predisplaydirection=0 1 \eqno(1)$$

\mathdirection1
(l)=false swapdir=false mathdir=TRT
$$\predisplaydirection=0 1 \eqno(1)$$

\end

I also attached the results I get with the current master (display_current.pdf)
and  with the patch (display_fixed.pdf).

Udi