[latex3-commits] [latex3/latex2e] latex-lab/UF-06: \pmb + poorman \bm WIP, only luatex (d25f811b)

[github at latex-project.org]

Repository : https://github.com/latex3/latex2e
On branch  : latex-lab/UF-06
Link       : https://github.com/latex3/latex2e/commit/d25f811b11cac4b8fcd28ebf157b8b37ca06e0b3

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

commit d25f811b11cac4b8fcd28ebf157b8b37ca06e0b3
Author: Ulrike Fischer <fischer at troubleshooting-tex.de>
Date:   Fri Feb 23 20:02:26 2024 +0100

    \pmb + poorman \bm WIP, only luatex


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

d25f811b11cac4b8fcd28ebf157b8b37ca06e0b3
 required/latex-lab/changes.txt           |  4 ++++
 required/latex-lab/latex-lab-amsmath.dtx | 32 +++++++++++++++++++++++++++++++
 required/latex-lab/latex-lab-mathpkg.dtx | 33 ++++++++++++++++++++++++--------
 3 files changed, 61 insertions(+), 8 deletions(-)

diff --git a/required/latex-lab/changes.txt b/required/latex-lab/changes.txt
index e68da021..d41cc34c 100644
--- a/required/latex-lab/changes.txt
+++ b/required/latex-lab/changes.txt
@@ -1,3 +1,7 @@
+2024-02-23 Ulrike Fischer <Ulrike.Fischer at latex-project.org> 
+	* latex-lab-amsmath.dtx, latex-lab-mathpkg.dtx: handle \pbm and poormans \bm 
+	(luatex only)
+
 2024-02-23 Ulrike Fischer <Ulrike.Fischer at latex-project.org> 
 	* update tagpdf and pdfmanagement
 
diff --git a/required/latex-lab/latex-lab-amsmath.dtx b/required/latex-lab/latex-lab-amsmath.dtx
index c87f5189..57e27067 100644
--- a/required/latex-lab/latex-lab-amsmath.dtx
+++ b/required/latex-lab/latex-lab-amsmath.dtx
@@ -199,6 +199,38 @@
  }
 %    \end{macrocode}
 %
+% \subsection{\cs{pmb}}
+% \cs{pmb} prints is argument three times. For tagging we must mark
+% two of occurences as artifact.
+% For luatex the attributes in the box must be reset, for this
+% we switch to expl3-boxes.
+%    \begin{macrocode}
+\AddToHook{package/amsbsy/after}
+ {
+   \def\pmb@@@@#1#2#3{\leavevmode\hbox_set:Nn\l_@@_tmpa_box{xxx#3}
+      \dimen at -\box_wd:N\l_@@_tmpa_box
+      \kern-.5\ex@\box_use:N\l_@@_tmpa_box      
+      \tag_mc_end:\tag_mc_begin:n{artifact}
+      \tag_mc_reset_box:N\l_@@_tmpa_box
+      \kern\dimen@\kern.25\ex@\raise.4\ex@\box_use:N\l_@@_tmpa_box
+      \kern\dimen@\kern.25\ex@\box_use_drop:N\l_@@_tmpa_box
+      \tag_mc_end:\tag_mc_begin:n{}
+    }
+   \def\pmb@#1#2{\hbox_set:Nn\l_@@_tmpa_box{$\m at th#1{#2}$}
+     \setboxz at h{$\m at th#1\mkern.5mu$}\pmbraise@\wdz@
+     \binrel@{#2}
+     \dimen at -\box_wd:N\l_@@_tmpa_box
+     \binrel@@@@{
+       \mkern-.8mu\box_use:N\l_@@_tmpa_box
+       \tag_mc_end:\tag_mc_begin:n{artifact}
+       \tag_mc_reset_box:N\l_@@_tmpa_box
+       \kern\dimen@\mkern.4mu\raise\pmbraise@\box_use:N\l_@@_tmpa_box
+       \kern\dimen@\mkern.4mu\box_use_drop:N\l_@@_tmpa_box
+       \tag_mc_end:\tag_mc_begin:n{}
+       }
+    }
+  }
+%    \end{macrocode}
 %    \begin{macrocode}
 \ExplSyntaxOff
 %    \end{macrocode}
diff --git a/required/latex-lab/latex-lab-mathpkg.dtx b/required/latex-lab/latex-lab-mathpkg.dtx
index a8e8e810..31e7d31e 100644
--- a/required/latex-lab/latex-lab-mathpkg.dtx
+++ b/required/latex-lab/latex-lab-mathpkg.dtx
@@ -68,15 +68,8 @@
 \ProvidesFile{latex-lab-mathpkg.ltx}
         [2023-01-05 v0.1a mathpkg adaptions]
 %    \end{macrocode}
-% \subsection{Tagpdf support}
-% To make the code independent from tagging being loaded and active
-% we load the \pkg{tagpdf-base} package:
-%
-%    \begin{macrocode}
-\RequirePackage{tagpdf-base}
-%    \end{macrocode}
-% 
 %
+% \subsection{breqn}
 %    \begin{macrocode}
 \AddToHook{package/breqn/after}{
    \RegisterMathEnvironment{dmath}
@@ -86,6 +79,7 @@
 }
 %    \end{macrocode}
 %
+% \subsection{cases}
 % Force loading of \pkg{amsmath} before \pkg{cases}.
 %    \begin{macrocode}
 \AddToHook {package/cases/before}{\RequirePackage{amsmath}}
@@ -94,6 +88,29 @@
 }  
 %    \end{macrocode}
 %    
+% \subsection{bm}
+% Similar to the amsbsy code in latex-lab-amsmath for \cs{pmb} we need to mark up 
+% copies as artifact:
+% 
+%    \begin{macrocode}
+\ExplSyntaxOn
+\AddToHook{package/bm/after}
+ {
+   \def\bm at pmb@@@@#1#2#3{{%
+     \hbox_set:Nn\l_@@_tmpa_box{$\m at th#1#3$}%
+     \dimen@#2\wd\tw@
+     \rlap{\box_use:N\l_@@_tmpa_box}%
+     \tag_mc_end:\tag_mc_begin:n{artifact}
+     \tag_mc_reset_box:N\l_@@_tmpa_box
+     \kern\dimen@
+     \raise1.5\dimen@\rlap{\box_use:N\l_@@_tmpa_box}%
+     \kern\dimen@
+     \box_use_drop:N\l_@@_tmpa_box
+     \tag_mc_end:\tag_mc_begin:n{}%
+     }}
+ }
+\ExplSyntaxOff 
+%    \end{macrocode}
 %    \begin{macrocode}
 %</kernel>
 %    \end{macrocode}