Is it possible to get section numbers in the PDF outline that shows up in PDF viewers?
By default, when enabling the PDF outline with \outlines, it shows up like this in my PDF viewer's sidebar:
I'd like to have each section in the sidebar prefixed by its section number like in the table of contents:
You can patch \_outlinesB using optex trick 137 in the following way
\replmacro \_outlinesB {} {} {"\\_tmp \{", "\\_tmp \{\#3 "} {}
\hyperlinks \Green \Red \outlines 0
\nonum\notoc\sec Contents
\maketoc
\sec Introduction
\lipsum[1]
\secc Motivation
\lipsum[2]
\secc Goals
\lipsum[4]
\sec Related Work
\lipsum[7]
\bye
or you can simply redefine it
\_def\_outlinesB#1#2#3#4#5#6#7{%
\_advance\_tocrefnum by1
\_isequal{\relax}{#4}\_iffalse
\_advance\_count#1 by1
\_ifcase#1%
\_tmpnum=\_trycs{_ol:\_the\_count0}{0}\_or
\_tmpnum=\_trycs{_ol:\_the\_count0:\_the\_count1}{0}\_relax\_or
\_tmpnum=\_trycs{_ol:\_the\_count0:\_the\_count1:\_the\_count2}{0}\_relax\_or
\_tmpnum=\_trycs{_ol:\_the\_count0:\_the\_count1:\_the\_count2:\_the\_count3}{0}\_relax\_or
\_tmpnum = 0\_relax\_fi
\_isempty{#4}\_iftrue \_pdfunidef\_tmp{#3 #5}\_else \_pdfunidef\_tmp{#3 #4}\_fi % <------------------------
\_outlinesC{toc:\_the\_tocrefnum}{\_ifnum#1<\_outlinelevel\_space\_else-\_fi}{\_tmpnum}{\_tmp}%
\_fi
}
\hyperlinks \Green \Red \outlines 0
\nonum\notoc\sec Contents
\maketoc
\sec Introduction
\lipsum[1]
\secc Motivation
\lipsum[2]
\secc Goals
\lipsum[4]
\sec Related Work
\lipsum[7]
\bye
The arguments of \_outlinesB are the same as for \_tocline, i.e.
\_tocline{⟨level⟩}{⟨type⟩}{⟨number⟩}{⟨o-title⟩}{⟨title⟩}{⟨gpageno⟩}{⟨pageno⟩}
see page 129 of optex-doc.pdf.
since \_tmp holds the text that is being converted to UTF-16 and written to the outline, you can add the section number in there, before \_pdfunidef does its magic.
\_outlinesB macro in the documentation but could not figure out how it works.