drehscheibe / soul Goto Github PK

Using soul sometimes breaks page numbering. This happens in particular when the highlighted/underlined text contains a paragraph break and appears near a page break. The fix would be a one-line change.

This bug was brought up in this question on StackExchange, as well as in a few other questions that have since been closed as duplicates. The questions and the answers contain some sample documents demonstrating the problem. A solution is proposed in my answer to the question.

The problem lies in the fact that soul uses\count0, which also holds the page number, as a local scratch register. Using \count0 in this manner is only safe if it is guaranteed that no page breaks may be triggered within the scope where it is used. This is not always true in soul's case.

To solve the problem, the line

\countdef\SOUL@minus\z@

in soul.dtx would simply need to be replaced by (for instance)

\newcount\SOUL@minus

Replacing the \z@ by 8 would also resolve the issue, but could still lead to similar problems if an output routine is employed that uses this register. A few of the other registers used by soul should probably also be similarly reserved.

as described here

https://tex.stackexchange.com/questions/520312/pdfx-causes-soul-to-stop-working

soul uses \dimen@ in a few places where it may be over-written by other code (and in fact it is overwritten by xcolor package in some places)

Would it be possible to make an update which uses a soul-specific allocated register instead of \dimen@ ?

CTAN marks soul as unmaintained,

https://ctan.org/pkg/soul

would you be happy if we merged it with the soulutf8 distribution and maintained this from

https://github.com/ho-tex/soul

which currently builds the soulutf8 extension