Hello LuaTeX developers,
I am facing a classic and difficult layout problem when using the *cuted*
package to switch from *twocolumn* to *onecolumn* (using *\switchonecolumn*
).
When I do this, two things break:
1. *Footnote Misplacement:* Footnotes that are declared just before
the *\switchonecolumn
*command are pushed to the previous page, often creating an unwanted
blank page.
2. *Float Drifting:* A *figure** float with the *[b] *(bottom) option
(using *stfloats*) is not placed at the bottom of the page. It drifts to
the very end of the document.
I have an MWE (below) that demonstrates both issues.
My question for this list is:* Could LuaTeX's capabilities offer a more
robust solution to this problem?*
I understand this is a complex issue related to TeX's output routine,
column balancing, and float/footnote queues, which the* cuted* package
tries to manage with TeX macros (like *\onecolumngrid*).
Is it conceivable that a Lua-based approach (perhaps using callbacks like
*pre_output_filter* or managing the vertical lists directly) could handle
the transition? For example, could Lua be used to:
- Force-process the pending floats and footnotes before the column
switch is executed?
- "Snapshot" the state of the footnote/float lists and re-insert them
correctly after the switch?
I am raising this here specifically to ask if a Lua-based solution is a
viable path to explore for this kind of complex page-layout challenge,
where traditional package macros seem to struggle.
Thank you for any insights. Any help would be greatly appreciated.
*MWE:*
\documentclass[twocolumn]{article}
\usepackage{lipsum}\usepackage{stfloats}\usepackage{cuted}
\begin{document}
\section{Introduction}
Para 1: \lipsum[1-5]
\begin{figure}[t]\fbox{\vbox to 10pc{\hbox to
.98\columnwidth{}}}\caption{This is single col figure 1.}\end{figure}
Para 2: \lipsum[6-8]
\begin{figure*}[b]\fbox{\vbox to 10pc{\hbox to
\textwidth{}}}\caption{single col figure 2.}\end{figure*}
Para 3: \lipsum[8]\footnote{fn1}\footnote{fn2}
Para 4: \lipsum[8]
\switchonecolumn
\section*{Appendix}
Para A1: \lipsum[1-4]
\switchtwocolumn
\end{document}
*Current output:*
[image: current output] <https://i.sstatic.net/gYezEZ3I.png>
*Link: **https://i.sstatic.net/gYezEZ3I.png
<https://i.sstatic.net/gYezEZ3I.png>*
*Expected output:*
[image: expected output] <https://i.sstatic.net/51hMKteH.png>
*Link: https://i.sstatic.net/51hMKteH.png
<https://i.sstatic.net/51hMKteH.png>*
Kumaresh P
Engineering Lead
P: +91 44 4596 4800
<https://tnqtech.com/> <https://www.linkedin.com/company/tnqtech/>
>
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