How to keep a constant baselineskip when using minipages in tables?

Question

Following up this question:

How to keep a constant baselineskip when using minipages (or \parboxes)?

The answers to the question suggest that \strut is not perfect to space minipages well with regard to the following line. They suggest a combination of the commands \par\xdef\tpd{\the\prevdepth} (within the minipage) and \prevdepth\tpd (outside the minipage).

However, the suggested solution is not working in tables, because \prevdepth\tpd needs to be written in a separate spaced-out line to work:

...
\par\xdef\tpd{\the\prevdepth}   
\end{minipage}

\prevdepth\tpd
...

The command would not allow me to use \\ instead of an empty line. However, the tabular-environment needs the \\ to separate the lines.

I tried

\begin{tabular}[t]{p{0.2 \linewidth}p{0.2 \linewidth}}
    lipsum & %
    \begin{minipage}[t]{\linewidth}
        lipsum\\lipsum
        \par\xdef\tpd{\the\prevdepth} 
    \end{minipage}\par
    \prevdepth\tpd 
    lipsum & lipsum
\end{tabular}

and similar things. I either get a compilation error from \prevdepth\tpd or from the tabular's missing \\. If I use an empty line and \\, I get an extra unwanted line break.

Is there a way to get this solution to work?

Edit: As requested, a full example

\documentclass[fontsize=11pt]{scrartcl}

\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}

\begin{document}
\setlength{\tabcolsep}{0pt}
\setlength{\parskip}{0pt}
\setlength{\parindent}{0pt}

\begin{tabular}[t]{p{0.2 \linewidth}p{0.2 \linewidth}}
lipsum & %
 \begin{minipage}[t]{\linewidth}lipsum\\libsum
 \end{minipage}\\ 
lipsum & lipsum
\end{tabular}
lipsum
\end{document}

Using the spacing command as suggested above I get this:

This close to the desired output, but comes at the cost of a compilation error (because of the missing line separator \\ in the table).

Answer 1

You don't need a minipage in order to have an itemize or enumerate in a p column: just issue \@minipagetrue inside it.

\documentclass[fontsize=11pt]{scrartcl}

\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}
\usepackage{array}
\usepackage{enumitem}
\makeatletter
\newcolumntype{P}[1]{>{\@minipagetrue}p{#1}}
\makeatother

\begin{document}

\begin{tabular}{|P{0.2 \linewidth}|P{0.2 \linewidth}|}
\hline
lipsum & 
\begin{itemize}
\item A
\item B
\end{itemize}
lipsum \\
\hline
lipsum & lipsum\\
\hline
\end{tabular}

\bigskip

\begin{tabular}{|P{0.2 \linewidth}|P{0.2 \linewidth}|}
\hline
lipsum & 
\begin{itemize}[nosep]
\item A
\item B
\end{itemize}
lipsum \\
\hline
lipsum & lipsum\\
\hline
\end{tabular}

\end{document}

I added the rules just for better showing the various cells, not because I endorse their usage.

Answer 2

I found a rather sloggish answer to my question. I hope there will be a better one, but it works.

\documentclass[fontsize=11pt]{scrartcl}

\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}

\newlength{\bls}

\begin{document}
\setlength{\bls}{\baselineskip}
\begin{tabular}[t]{p{0.2 \linewidth}p{0.2 \linewidth}}
    lipsum & %
    \begin{minipage}[t]{\linewidth}
        lipsum\\lipsum
        \par\xdef\tpd{\the\prevdepth} 
    \end{minipage}

    \prevdepth\tpd\\[\-bls]
    lipsum & lipsum
\end{tabular}

\end{document}

As mentioned above I can get the code to work on the cost of gaining an extra line. I can then shift the text upwards one line by using \\[-\bsl]. For some reason it would not let me use \\[-\baselineskip] directly to shift the text upwards while I can use \\[\baselineskip]to shift the text one line downwards. Instead I need to define a new length outside the tabular. Only then both up and down shifting work as they should. (My latex skills are not good enough to know why this is the case.)