Paragraph style footnotes in plain XeTeX

Question

I’m trying to get footnotes set in the paragraph style in plain XeTeX. I’ve pasted the code from fnpara.tex into the preamble of my document and changed the fonts used in the actual footnotes to Palatino Linotype by pasting:

\font\footnumberfont="Palatino Linotype:mapping=tex-text" at 8pt

\font\footnotesize="Palatino Linotype:mapping=tex-text" at 8pt

after the code from `fnpara'. The main font in my document is set like this:

\font\pala="Palatino Linotype:+onum,mapping=tex-text" at 10pt

I call it by putting `\pala' at the start of the text. Everything works fine except for one thing: the superscript footnote reference numbers in the text block are in Computer Modern (cmr7), which looks strange, since everything else is in Palatino. I’m new to plain (Xe)TeX.

minimum working example:

%!TEX TS-program = xetex

%!TEX encoding = UTF-8 Unicode

\input eplain

\font\pala="Palatino Linotype:+onum,mapping=tex-text" at 10pt

PLACE CODE FROM "fnpara.tex" HERE

\font\footnumberfont="Palatino Linotype:mapping=tex-text" at 8pt 
\font\footnotesize="Palatino Linotype:mapping=tex-text" at 8pt

\pala

Lorem\footnote{First footnote.} ipsum dolor sit amet,\footnote{Second footnote.
(Every once in a while a long footnote might occur, just to make things difficult.)}
consectetur adipisicing\footnote{Third footnote.} elit,

\bye

i put the MWE in the question; thanks Torbjørn T.

Answer 1

I think I’ve fixed it. It was a math mode problem. I got some code from https://gist.github.com/wspr/616937

% set up Cambria Math as math roman, symbol and extension families
\font\1="Cambria Math:script=math" at 10pt
\font\2="Cambria Math:script=math;+ssty=0" at 7pt
\font\3="Cambria Math:script=math;+ssty=1" at 5pt
\textfont0=\1 \scriptfont0=\2 \scriptscriptfont0=\3
\textfont2=\1 \scriptfont2=\2 \scriptscriptfont2=\3
\textfont3=\1 \scriptfont3=\2 \scriptscriptfont3=\3
\let\tenrm=\1 \rm

and edited it down to:

\font\1="Palatino Linotype" at 7pt
\scriptfont0=\1

then I pasted this after the code from fnpara and it put my footnote superscripts into Palatino Linotype. I’m not using XeTeX to typeset mathematics, so this is all I need. I just want my superscripts not to be in Computer Modern.

Answer 2

There is another (perhaps better) way of doing it. Define a font

\font\sups="Palatino Linotype:+sups,mapping=tex-text" at 10pt

then replace the line

$^{\the\footno}$\@sf\vfootnote}

of fnpara.tex with

{\sups\the\footno}\@sf\vfootnote}

Instead of using math mode to generate footnote superscripts, this method uses the OpenType ‘sups’ tag.