making the rotating package tagging compatible (#1537)

* handle tagging 751+112, WIP

* add \leavevmode for latex3/tagging-project#112

* update changes entry

* docu

* update dates

required/graphics/changes.txt

@@ -7,6 +7,11 @@ are not part of the distribution.
 ================================================================================
 All changes above are only part of the development branch for the next release.
 ================================================================================
+2025-01-14  Ulrike Fischer <[email protected]>
+
+	* rotating.dtx: Tagging support for sideways floats (tagging-project#751).
+	Added \leavevmode to sideways, turn etc (tagging-project#112).
+
 
 2024-12-31  David Carlisle  <[email protected]>
 

required/graphics/rotating.dtx

@@ -30,7 +30,7 @@
 \ProvidesFile{rotating.dtx}%
 %</dtx>
 %<package>\ProvidesPackage{rotating}%
-    [2016/08/11 v2.16d
+    [2025/01/14 v2.16e
 %<package>  rotated objects in LaTeX%
 %<*dtx>
             rotating package source file%
@@ -257,8 +257,12 @@
 % \section{Turning and rotation environments}
 % \begin{macro}{sideways}
 % Environment to turn the contents through 90 degrees.
+% \changes{v2.16e}{2025/01/14}{add \cs{leavevmode} for tagging support}
+% \cs{Grot@box} issues a \cs{leavevmode} but for tagging (when using lualatex)
+% this is too late, it should happen before the box is set.
 %    \begin{macrocode}
 \def\sideways{%
+  \leavevmode
   \Grot@setangle{90}%
   \setbox\z@\color@hbox\ignorespaces}
 \def\endsideways{%
@@ -272,8 +276,10 @@
 %
 % \begin{macro}{turn}
 % Rotate the contents of the environment, leaving the appropriate space
+% \changes{v2.16e}{2025/01/14}{add \cs{leavevmode} for tagging support}
 %    \begin{macrocode}
 \def\turn#1{%
+  \leavevmode
   \Grot@setangle{#1}%
   \setbox\z@\color@hbox\ignorespaces}
 \def\endturn{%
@@ -286,8 +292,10 @@
 % \end{macro}
 % \begin{macro}{rotate}
 % Rotate the contents of the environment, leaving \emph{no space}.
+% \changes{v2.16e}{2025/01/14}{add \cs{leavevmode} for tagging support} 
 %    \begin{macrocode}
 \def\rotate#1{%
+  \leavevmode
   \Grot@setangle{#1}%
   \setbox\z@\color@hbox\ignorespaces}
 \def\endrotate{%
@@ -301,8 +309,10 @@
 % \end{macro}
 % \begin{macro}{\turnbox}
 % A macro version of the `rotate' environment.
+% \changes{v2.16e}{2025/01/14}{add \cs{leavevmode} for tagging support}
 %    \begin{macrocode}
 \def\turnbox#1#2{%
+  \leavevmode
   \Grot@setangle{#1}%
 %    \end{macrocode}
 % Note: grouping within the box makes \cs{color@hbox} unnecessary, I think.
@@ -350,9 +360,13 @@
 %    \end{macrocode}
 % Set the float contents in
 % a box of width \cs{textheight} instead of \cs{columnwidth}.
+% \changes{v2.16e}{2025/01/14}{correct tagging of the minipage}
 %    \begin{macrocode}
   \begin{lrbox}\rot@float@box
+  \SuspendTagging{\minipage}%
   \begin{minipage}\textheight
+  \ResumeTagging{\minipage}%
+  \UseTaggingSocket{para/restore}%
  }
 %    \end{macrocode}
 % \end{macro}
@@ -372,7 +386,10 @@
 % we need to use the a variant \cs{pageref} mechanism and our own
 % specialised labels.
 %    \begin{macrocode}
-   \end{minipage}\end{lrbox}%
+   \par\SuspendTagging{\minipage}%
+   \end{minipage}%
+   \ResumeTagging{\minipage}%
+   \end{lrbox}%
    \stepcounter{r@tfl@t}%
    \rot@label{RF\ther@tfl@t}%
    \rot@pageref{RF\ther@tfl@t}{\R@@page}%