Dtyjlui

In my document, I have two chapter titles with em commands and --- dashes, which get correctly converted to italics and em-dash in the text. But the PDF bookmarks are not created properly:

• 
  em: if I use syntax em{text}, bookmark is created with only text (as expected). If I use {em text}, this entire string is used as-is in PDF bookmark.


• 
  ---: conversion to em-dash never occurs.

How can I get em and --- properly in PDF bookmarks? I don't need the bookmark gets styled. Below a code sample and screenshot (in SumatraPDF):

setupinteraction[state=start]

placebookmarks[chapter, section][chapter, section]

setupinteractionscreen[option=bookmark]

setuptagging[state=start]

starttext

chapter[title={{em Chapter} --- a note}]



Some paragraph.



section{{em A year from monday} --- from John Cage}



Some paragraph.



chapter[title={em{Chapter} --- another note}]



Some paragraph.



section{em{Silence} --- from John Cage}



Some paragraph.



stoptext

Screenshot (note bookmarks with --- and em appearing):

To expand all macros in the bookmarks, you have to add

enabledirectives[references.bookmarks.preroll]

in your document. I don't think you can apply ligatures in the bookmarks, because ligatures are part of the font. What you can do is, instead of --- either use the Unicode character — (U+2014 EM DASH) directly or the corresponding control sequence emdash.

Also, when you use tagging, I think you have to use the start...stop pairs for chapter, section, etc. At least pdfinfo shows me wrong nesting if I don't use start...stop.

enabledirectives[references.bookmarks.preroll]

setupinteraction[state=start]

placebookmarks[chapter, section][chapter, section]

setupinteractionscreen[option=bookmark]

setuptagging[state=start]



starttext



startchapter[title={{em Chapter} — a note}]



  Some paragraph.



  startsection[title={{em A year from monday} — from John Cage}]



    Some paragraph.



  stopsection



stopchapter





startchapter[title={emph{Chapter} emdash another note}]



  Some paragraph.



  startsection[title={emph{Silence} emdash from John Cage}]



    Some paragraph.



  stopsection



stopchapter



stoptext

$ pdfinfo -struct-text test.pdf

Div

  Sect "chapter"

    Div

      H (block)

        "1"

      H (block)

        "Chapter— a note"

    Div

      "Some paragraph."

      Sect "section"

        Div

          H (block)

            "1.1"

          H (block)

            "A year from monday— from John Cage"

        Div

          "Some paragraph."

  Sect "chapter"

    Div

      H (block)

        "2"

      H (block)

        "Chapter— another note"

    Div

      "Some paragraph."

      Sect "section"

        Div

          H (block)

            "2.1"

          H (block)

            "Silence— from John Cage"

        Div

          "Some paragraph."