Try this:
\documentclass{book}
\usepackage{luacode}
\usepackage{siunitx}
\begin{document}
\begin{luacode*}
local domobject = require "luaxml-domobject"
local transform = require "luaxml-transform"
sample = [[
<datas>
<arttitle>Quantum vacuum under mixed boundary conditions: the case for curved spacetime</arttitle>
<table-wrap id="tab1" position="float">
<label>Table 1ABC.</label>
<caption id="t1"><p>The large <italic>x</italic> behavior for different <italic>w</italic>.</p></caption>
<table>
<thead valign="top">
<tr>
<th align="center">Case n°</th>
<th align="center">1</th>
<th align="center">2</th>
<th align="center">3</th>
<th align="center">4</th>
<th align="center">5</th>
</tr>
</thead>
<tbody valign="top">
<tr>
<td align="left">Sl. No</td>
<td align="char" char=".">0.1</td>
<td align="char" char=".">0.1</td>
<td align="char" char=".">0.1</td>
<td align="center">100</td>
<td align="char" char=".">1.0</td>
</tr>
<tr>
<td>B1</td>
<td>B2</td>
<td>B3</td>
<td>B4</td>
<td>B5</td>
<td>B6</td>
</tr>
</tbody>
</table>
</table-wrap>
</datas>]]
local dom = domobject.parse(sample)
local alignments = {left="l", center="c", right="r"}
-- rules for conversion
transform.add_action("p", "%s\n\n")
transform.add_action("italic", "\textit{%s}")
transform.add_action("arttitle", "\noindent{\large\bfseries %s\par\noindent}")
transform.add_action("table-wrap", [[
\begin{table}
%s
\end{table}
]])
transform.add_action("label", "\label{%s}")
transform.add_action("caption", "\caption{%s}")
transform.add_action("table", [[
\begin{tabular}{@{data-columns}}
%s
\end{tabular}
]])
transform.add_action("tr", "%s \\")
transform.add_action("td[align='left']", "& \multicolumn{1}{l}{%s}")
transform.add_action("td[align='left']:first-child", "\multicolumn{1}{l}{%s}")
transform.add_action("td[align='char'][char='.']", "& \multicolumn{1}{S}{%s}")
transform.add_action("td[align='char'][char='.']:first-child", "\multicolumn{1}{S}{%s}")
transform.add_action("td", "& %s ")
transform.add_action("td:first-child", "%s ")
transform.add_action("th", "& %s ")
transform.add_action("th:first-child", "%s ")
-- get table columns
local function get_columns(tbl)
local columns = {}
for _, column in ipairs(tbl:query_selector("th")) do
-- save column alignment. left is default
local align = column:get_attribute("align") or "left"
table.insert(columns, alignments[align])
end
return table.concat(columns, " ")
end
for i, tbl in ipairs(dom:query_selector("table")) do
-- save table columns in table attribute, so it is available in transformation rules
local columns = get_columns(tbl)
tbl:set_attribute("data-columns", columns)
end
local converted = transform.process_dom(dom)
print(converted)
transform.print_tex(converted)
\end{luacode*}
\end{document}
It reuses code from my previous answer, only new code is this:
transform.add_action("td[align='left']", "& \\multicolumn{1}{l}{%s}")
transform.add_action("td[align='left']:first-child", "\\multicolumn{1}{l}{%s}")
transform.add_action("td[align='char'][char='.']", "& \\multicolumn{1}{S}{%s}")
transform.add_action("td[align='char'][char='.']:first-child", "\\multicolumn{1}{S}{%s}")
It sets actions for <td> elements with align attribute. We duplicate code for each selector and use the:first-child pseudo class. This is necessary to handle & characters, you would get runtime LaTeX error about spurious & character otherwise.
It uses feature provided by the siunitx package, namely that it supports alignment by decimal point. Unfortunately, it works correctly only when specified in tabular declaration, it doesn't seem to have any effect on individual table cells, which is understandable.
This is the result:
siunitx'sScolument to align table column to dot, but it doesn't work with this method: https://tex.stackexchange.com/a/47677/2891. – michal.h21 Aug 27 '21 at 16:41align="char" char="."and find in tbody instead of thead. I had triedtbody tr[1]it's not working. – Balaji Aug 27 '21 at 16:49td[align='char'], but you will not be able to change the alignment in the LaTeX table cell – michal.h21 Aug 27 '21 at 17:11