[latex3-commits] [git/LaTeX3-latex3-xcolor] testl3color: support switching of the color stack with pdfcol (dfb53cf)

[Ulrike Fischer]

Repository : https://github.com/latex3/xcolor
On branch  : testl3color
Link       : https://github.com/latex3/xcolor/commit/dfb53cf421aa7397bc2bdf403369866b68bd3a1a

>---------------------------------------------------------------

commit dfb53cf421aa7397bc2bdf403369866b68bd3a1a
Author: Ulrike Fischer <fischer at troubleshooting-tex.de>
Date:   Mon Jan 16 14:00:03 2023 +0100

    support switching of the color stack with pdfcol


>---------------------------------------------------------------

dfb53cf421aa7397bc2bdf403369866b68bd3a1a
 xcolor.dtx | 27 +++++++++++++++++++++++++++
 1 file changed, 27 insertions(+)

diff --git a/xcolor.dtx b/xcolor.dtx
index 02ae333..85a12c6 100644
--- a/xcolor.dtx
+++ b/xcolor.dtx
@@ -7103,6 +7103,33 @@
 %-------------------------------------------------------------------------------
 % \fi
 %
+% \subsection{Temporary patches to other packages}
+% 
+% The following are patches needed during the transition to the l3color commands.
+% They should disappear again!
+%
+%  \subsubsection{pdfcol}
+%  The pdfcol package allows to switch the color stack, but it does it only 
+%  for the name |\@pdfcolorstack| used in the color/xcolor backend. We need to 
+%  switch also the l3color stack:
+%    \begin{macrocode}
+%<*package>
+\ExplSyntaxOn
+\AddToHook{package/pdfcol/after}
+  {
+   \def\pdfcolSwitchStack#1{%
+     \pdfcolIfStackExists{#1}{%
+       \expandafter\let\expandafter\@pdfcolorstack
+                      \csname pdfcol at Stack@#1\endcsname
+       \int_set:Nn\l__color_backend_stack_int{ \@pdfcolorstack }               
+     }{%
+      \pdfcol at ErrorNoStack{#1}%
+    }%
+  }%
+}
+\ExplSyntaxOff
+%</package>
+%    \end{macrocode}
 % \subsection{Auxiliary definitions}
 %
 % \subsubsection{\Index{PostScript} prologue file \File{xcolor.pro}}