Re: Tablature - Parenthesizing Tied Notes

[Stefan E. Mueller]

Thanks Jean,

but it looks like I am a little behind with my Debian package-based
Lilypond 2.18.2 installation. So I get some complaints about "Unbound
variable: grob::rhythmic-location" and Lilypond exits in error with return
code 1.

I still need to grok all this scheme/guile mechanics, because so far I did
not dive into the deeper layers of Lilypond yet. Eventually I can get it
to work also with 2.18.2, or manage to update to the latest version.

Again thanks for the help, this is very appreciated.

        Stefan

--
Stefan E. Mueller

stefan.e.mueller@gmx.de

On Wed, 9 Feb 2022, Jean Abou Samra wrote:

> Le 06/02/2022 à 22:55, Stefan E. Mueller a écrit :
> > Ties over a line break are parenthesized by default in tablature - I was
> > wondering if one could also have parenthesized tablature notes for ties
> > over a bar line.
> >
> > Thanks for any help.
> >
> >     Stefan
>
>
> The default logic is in Tie.after-line-breaking, by default
> tie::handle-tab-note-head in TabStaff. When the span-start
> property of TabNoteHead is #t, it remains parenthesized
> even if it would normally be hidden (this is used by default
> when the tab note head starts a slur or glissando). You can
> override the default logic to set it also in the case where
> the tie spans a bar line.
>
> \version "2.22.1"
>
> #(use-modules (ice-9 match))
>
> #(define (tie::tab-note-head-parenthesized-after-bar-line grob)
>    (match-let* ((left (ly:spanner-bound grob LEFT))
>                 (right (ly:spanner-bound grob RIGHT))
>                 ((left-bar-number . _) (grob::rhythmic-location left))
>                 ((right-bar-number . _) (grob::rhythmic-location right)))
>      (if (and (grob::has-interface right 'tab-note-head-interface)
>               (not (eqv? left-bar-number right-bar-number)))
>          (ly:grob-set-property! right 'span-start #t))
>      (tie::handle-tab-note-head grob)))
>
> \layout {
>   \context {
>     \TabStaff
>     \override Tie.after-line-breaking =
> #tie::tab-note-head-parenthesized-after-bar-line
>   }
> }
>
> \new TabStaff {
>   c'2~ 2~ 2~ 2~ \break 2~ 2
> }
>
>
> Best,
> Jean