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-rw-r--r--macros/latex-dev/required/latex-lab/documentmetadata-support.dtx34
1 files changed, 30 insertions, 4 deletions
diff --git a/macros/latex-dev/required/latex-lab/documentmetadata-support.dtx b/macros/latex-dev/required/latex-lab/documentmetadata-support.dtx
index 54483ec4c9..a629d9c551 100644
--- a/macros/latex-dev/required/latex-lab/documentmetadata-support.dtx
+++ b/macros/latex-dev/required/latex-lab/documentmetadata-support.dtx
@@ -350,14 +350,35 @@
\file_input:n {l3backend-testphase-\c_sys_backend_str.def}
\ExplSyntaxOff\makeatother
% \end{macrocode}
-% Set the default language (this requires that the backend has been loaded),
-% process the rest of the keys,
-% and setup the generic driver.
+%
+% Process the init keys and setup the generic driver.
% \begin{macrocode}
- \keys_set_filter:nnn { document / metadata } { init } { lang=en-US, #1 }
+ \keys_set_filter:nnn { document / metadata } { init } { #1 }
\bool_if:NT \g_@@_active_bool
{
\PassOptionsToPackage{customdriver=hgeneric-testphase}{hyperref}
+% \end{macrocode}
+% Finally we setup the language default.
+% This is done after the begindocument hook so that it can pick up settings
+% from babel. If the Catalog dictionary already contains a lang value we do nothing,
+% otherwise we use the value stored in \cs{BCPdata}, either the main language
+% (if its exists) or the fall back language.
+% Note: if babel is loaded without a language this gives the language \texttt{und}.
+% \begin{macrocode}
+ \g@addto@macro\@kernel@after@begindocument
+ {
+ \pdfdict_get:nnN {g__pdf_Core/Catalog}{Lang}\l_@@_tmpa_tl
+ \quark_if_no_value:NT\l_@@_tmpa_tl
+ {
+ \tl_if_empty:eTF { \BCPdata{main.language} }
+ { \tl_set:Ne \l_@@_tmpb_tl { \BCPdata{language} } }
+ { \tl_set:Ne \l_@@_tmpb_tl { \BCPdata{main.language} } }
+ \msg_warning:nne { meta } { lang-missing }{ \l_@@_tmpb_tl }
+ \exp_last_unbraced:Ne
+ \AddToDocumentProperties{[document]{lang}{\l_@@_tmpb_tl}}
+ \pdfmanagement_add:nne {Catalog} {Lang}{(\l_@@_tmpb_tl)}
+ }
+ }
}
% \end{macrocode}
% \cs{pdfmanagement_add:nnn} has collected values in this hook.
@@ -556,6 +577,11 @@
{
LaTeX-lab~package~'#1'~not~found.
}
+\msg_new:nnn { meta } { lang-missing }
+ {
+ The~language~has~not~been~set~in~\token_to_str:N
+ \DocumentMetadata.\\Setting~it~to~'#1'~as~fallback.
+ }
% \end{macrocode}
%
% \begin{macrocode}