\rotatebox does not work correctly when used inside \NewTableCommand

[dahosek]

Demonstration of bug:

\NewTableCommand{\obliqueheader}[1]
   {\rotatebox{45}{#1}}
\begin{tblr}{lrr}
\obliqueheader{Paper size}
  & \obliqueheader{Height (mm)}
  & \obliqueheader{Width (mm)}\\
\hline
A4 & 297 & 210 \\
B4 & 353 & 250 \\
C4 & 324 & 229 
\end{tblr}

Correct behavior shown with:

\newcommand{\obliqueheader}[1]
   {\rotatebox{45}{#1}}
\begin{tblr}{lrr}
\obliqueheader{Paper size}
  & \obliqueheader{Height (mm)}
  & \obliqueheader{Width (mm)}\\
\hline
A4 & 297 & 210 \\
B4 & 353 & 250 \\
C4 & 324 & 229 
\end{tblr}

(I had hoped to be able to use \SetCell in my \obliqueheader definition which is why I was using \NewTableCommand

[lvjr]

@dahosek maybe cmd option is what you want:

\documentclass{article}
\usepackage{tabularray,graphicx}
\begin{document}

\newcommand{\obliqueheader}[1]{\rotatebox{45}{#1}}

\begin{tblr}{colspec=lrr,row{1}={cmd=\obliqueheader}}
Paper size & Height (mm) & Width (mm) \\
\hline
A4 & 297 & 210 \\
B4 & 353 & 250 \\
C4 & 324 & 229 
\end{tblr}

\end{document}

[dbitouze]

maybe cmd option is what you want:

I would recommend to use in addition a box with null width:

\documentclass{article}
\usepackage{tabularray,graphicx}
\begin{document}

\newcommand{\obliqueheader}[1]{\rotatebox{45}{\makebox[0pt][l]{#1}}}

\begin{tblr}{colspec=lrr,row{1}={cmd=\obliqueheader}}
Paper size & Height (mm) & Width (mm) \\
\hline
A4 & 297 & 210 \\
B4 & 353 & 250 \\
C4 & 324 & 229
\end{tblr}

\end{document}

[dahosek]

@dahosek maybe cmd option is what you want:

I’m aware of that (the ergonomics of cmd aren’t great though), I guess the point of clarification is that \NewTableCommand, it’s not possible to do what I was thinking I could and it should only be used to make a shortcut for a single table command without any other typesetting involved. This is all directed towards providing good documentation of tabularray in my book. I see a different way to manage this though that would provide better ergonomics—

@dbitouze I was leaving that out as I worked out the rest of the issue around the table typesetting. You will notice that without overriding the header formatting, by the way, that the placement of the height and width headers is off. I also, would tend to put the \makebox around the \rotatebox rather than the other way around. With your approach, if there’s text above, it will overprint the oblique header.

[lvjr]

@dahosek In fact, this is a duplicate of #98. In the future, you will be able to write

\NewTableCommand\obliqueheader{\SetCell{rotate=45}}

[hvoss49]

Setting also the origin of the rotation would be nice, e.g. \NewTableCommand\obliqueheader{\SetCell{rotate=45,origin=c}}.

[dahosek]

@lvjr A bit of confusion in that I was perhaps oversimplifying what I was trying to do with \NewTableCommand where I wanted to have more happening than just a call to \SetCell and I removed the \SetCell to show the minimal result. I need to update the section of my book that discusses \NewTableCommand to make it clear that it can only provide a shortcut for a single (is this correct?) tblr command.

[lvjr]

@dahosek Maybe the manual is not clear enough about the usage of \NewTableCommand. In the code, tabularray extracts and executes table commands from the beginning of each cell before typesetting any cell. So the manual states:

And you can not put cell text inside any table command defined with \NewTableCommand.

Table commands are used to change the specifications of tables. Normally it is a shortcut for some \Set*** commands (you can use several of them in one table command) provided by tabularray. But in general you can use any commands without output (such as \empty, relax or conditionals) in a table commands.