Re: DurationLine avoiding RehearsalMarks

[Mark Knoop]

At 10:30 on 11 Apr 2022, Thomas Morley wrote:
> Am Mo., 11. Apr. 2022 um 09:53 Uhr schrieb Mark Knoop <mark@opus11.net>:
> > At 19:12 on 10 Apr 2022, Mark Knoop wrote:
> > > I'm trying to debug some issues I'm having with the new DurationLine grob. 
> > > Previously I've been using a TextSpanner to achieve similar results.
> > >
> > > One issue is that DurationLine adds space at the left side of a broken spanner, 
> > > seemingly to avoid overlapping with a RehearsalMark. I'd like it to start 
> > > underneath the RehearsalMark, as the TextSpanner does.
> > >
> > > The problem is illustrated in this example.
> > >
> > > \version "2.23.6"
> > > \header { tagline = ##f }
> > > \score {
> > > <<
> > > \new Dynamics {
> > > \repeat unfold 31 { s1 \mark \default }
> > > }
> > > \new Voice \with {
> > > \consists Duration_line_engraver
> > > } {
> > > c'1:32\-^\markup "using DurationLine" s1*18
> > > s1
> > > \override TextSpanner.style = #'line
> > > \override TextSpanner.thickness = #4
> > > \override TextSpanner.outside-staff-priority = ##f
> > > \override TextSpanner.Y-offset = #0
> > > r4\startTextSpan^\markup "using TextSpanner" 4 4 4
> > > R1*16
> > > <>\stopTextSpan
> > > R1
> > > }
> > > >>
> > > }
> >
> > I'm able to remove the extra space with
> >
> > \override Score.RehearsalMark.non-musical = ##f
> >
> > but this has some undesirable consequences for RehearsalMark positioning. Is 
> > there a way to set this only for RehearsalMarks at the start of a line?
> Hi Mark,
>
> DurationLine is designed not to be printed if breakable items at
> line-end/start are present, like Clef, KeySignature etc.
> I wasn't aware RehearsalMark is ofcourse one of them.
> Currently I'm preparing a patch to disregard RehearsalMark.
> Is your use-case urgent?
>
> Cheers,
> Harm

Thanks Harm,

I understand. My deadline is end of this week, but if you're able to give me a 
pointer as to where to start on this then I can have a go at fixing it myself.

I've noticed a couple of other occasional (possible) bugs with DurationLine in 
complex situations, but haven't been yet able to reproduce in a MWE. (Sometimes 
stopping at the wrong place or not appearing at all.)

--
Mark Knoop