[latex3-commits] [latex3/tagpdf] develop, main: avoid missing S key, fix latex3/tagging-project#86 (ac80101f)

[github at latex-project.org]

Repository : https://github.com/latex3/tagpdf
On branches: develop,main
Link       : https://github.com/latex3/tagpdf/commit/ac80101f121f270ba058c5bd5f38ef283c242ede

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

commit ac80101f121f270ba058c5bd5f38ef283c242ede
Author: Ulrike Fischer <fischer at troubleshooting-tex.de>
Date:   Thu Jun 20 14:47:25 2024 +0200

    avoid missing S key, fix latex3/tagging-project#86


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

ac80101f121f270ba058c5bd5f38ef283c242ede
 CHANGELOG.md      | 4 ++++
 tagpdf-struct.dtx | 1 +
 tagpdf-tree.dtx   | 4 ++++
 3 files changed, 9 insertions(+)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 465b53f6..0b3b865a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,10 @@ All notable changes to the `tagpdf` package since the
 
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 this project uses date-based 'snapshot' version identifiers.
+## [Unreleased]
+
+### Fixed
+ - loop with xelatex https://github.com/latex3/tagging-project/issues/86
 
 ## [2024-04-12]
 ### Added
diff --git a/tagpdf-struct.dtx b/tagpdf-struct.dtx
index 53a5ba6d..dfc2a4fa 100644
--- a/tagpdf-struct.dtx
+++ b/tagpdf-struct.dtx
@@ -1579,6 +1579,7 @@
                   { g_@@_struct_ \l_@@_struct_stack_parent_tmpa_tl _prop}
                   {S}
                   \l_@@_tmpa_tl
+                \quark_if_no_value:NT\l_@@_tmpa_tl{\tl_set:Nn \l_@@_tmpa_tl{UNKNOWN}} 
                 \msg_warning:nneee 
                  { tag } 
                  {role-parent-child} 
diff --git a/tagpdf-tree.dtx b/tagpdf-tree.dtx
index 9b643f5d..58a333dd 100644
--- a/tagpdf-tree.dtx
+++ b/tagpdf-tree.dtx
@@ -275,6 +275,10 @@
          {
           \l_@@_tmpa_tl            
          }
+%    \end{macrocode}
+% Better put S back, see https://github.com/latex3/tagging-project/issues/86
+%    \begin{macrocode}
+      \prop_gput:cnn { g_@@_struct_1_prop } {S}{ /StructTreeRoot }     
   } 
 %    \end{macrocode}
 % \end{macro}