Re: Split percent repeats at line breaks

[antlists]

On 29/02/2020 13:10, Davide Liessi wrote:
> Hi all.
> I'd like to have percent repeats automatically split at line breaks,
> i.e., in the following example I'd like the first score to look like
> the second.
>
> \version "2.19.84"
> \score {
>    \repeat percent 30 { c'1 }
> }
> \score {
>    {
>      \repeat percent 14 { c'1 }
>      \repeat percent 16 { c'1 }
>    }
> }
>
> I think that this should typically also reset the percent repeat
> counter, effectively behaving as if they were distinct percent
> repeats, but being able to choose whether to reset it or not would be
> nice.
>
> Is there a way to achieve this?
I think your first requirement is the norm for human engraving, 
certainly I've never come across any music outside of lilypond where a 
staff has a percent as its first bar. Equally, I've never seen it reset 
the count - that just carries on. What I have seen is where the count 
only starts at eg bar 5.

I don't know enough about lilypond internals, but I guess the big 
problem is that if the line-breaking calculation actually affects the 
size of the bar (changing the first bar of a line from a percent to a 
copy of bar 1 of the repeat), then the calculation itself could get into 
quite a tangle.

Cheers,

Wol