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Re: PDF outline not capturing Cyrillic text

From: Oliver Corff
Subject: Re: PDF outline not capturing Cyrillic text
Date: Sun, 18 Sep 2022 20:19:18 +0200
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.2.0

Dear Peter, Dear All,

this problem is presumably not limited to groff. I remember the same
issue when I was building LaTeX texts with foreign language elements (in
my case, among others: Chinese) with the package to create internal
links from (hyperref, iirc) table of contents to chapters,etc. As soon
as there were non-ASCII characters in the anchor, the result was
(halfway working) garbage.

My memory of this issue should only serve as a point of reference, I
think modern versions of hyperref can produce non-ASCII links and output.

Best regards,


On 17/09/2022 23:35, Peter Schaffter wrote:
Greetings, all.

Source documents written in Cyrillic and processed with mom/pdfmom
break the PDF outline:

1. The text of titles and headings is not displayed in the outline.

2. If there are items where English is automatically part of the
    outline label (cover, title page), the label prints (minus the
    text), but the linking hierarchy fails with some viewers if there
    are intervening titles or headings, e.g.
      doc cover (Cyrillic)
      copyright notice (in English)
      table of contents (auto relocated)
      title page (Cyrillic)
      chapter title (Cyrillic)
      body text with Cyrillic headings
    With the above arrangement, the outline in okular and evince shows
      Cover: (no text)
      Title Page: (no text)
    In okular, clicking on Copyright takes you to the correct page,
    however in evince, clicking on Copyright takes you to the table
    of contents page.

At a guess, it looks as if gropdf or pdfmark isn't recognizing Cyrillic
characters as valid input for creating pdf bookmarks.  I'm at a
loss as to how to overcome this.  Ideas?

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