Re: Placement of outside-staff objects: bug and behaviour change between 2.12.3 and 2.13.54

[Colin Campbell]

On 11-03-20 12:53 AM, Frédéric Bron wrote:
> Although outside-staff-priorities seem to not have changed between
> 2.12 and 2.13 (I compared roughtly define-grobs.scm), there is
> something strange:
> In the example below, the vertical placement of OttavaBracket,
> TextScript and MetronomeMark is not in the same order with 2.12.3 and
> 2.13.54 although using the same code.
>
> \layout {
>          \context { \Score \override MetronomeMark
> #'outside-staff-priority = #200 }
> }
>
> \relative c' {
>          \tempo "tempo" 4 = 66
>          \ottava #1
>          c''1^"markup"
>          \ottava #0
> }
>
> Following the documentation
> http://lilypond.org/doc/v2.13/Documentation/learning/outside_002dstaff-objects,
> MetronomeMark should be in the Score context, not in the Staff context
> as are OttavaBracket and TextScript so that changing it
> outside-staff-priority should not affect the output as with 2.12.3 so
> that I think this is a regression.
> There should be a test including absolutly all possible objects that
> are to be placed outside a staff so that this behaviour can be
> controlled.
>
> I have built such a test:
> \relative c' {
>          \override Score.BarNumber #'break-visibility = #all-visible
>          \set Score.skipBars = ##t
>          \dynamicUp
>          \override TextSpanner #'(bound-details left text) = \markup
> "TextSpanner (Staff 350)"
>          \tempo "MetronomeMark (Score 1000)" 4 = 60
>          \repeat volta 2 {
>                  \ottava #1
>                  c''1\p\<^"TextScript (Staff 450)"\startTextSpan\startTrillSpan
>          }
>          \alternative {
>                  {
>                          R1*2\mark "RehearsalMark (Score 1500)"
>                          c\!\stopTextSpan\stopTrillSpan\trill
>                          \ottava #0
>                  }
>                  {
>                          c
>                  }
>          }
> }
>
> With this test, using only default outside-staff-priorities, there are
> differencies between 2.12.3 and 2.13.54:
>
> Order should be from top to bottom:
>
> 1 RehearsalMark
> 2 MetronomeMark
> 3 BarNumber
> 4 MultiMeasureRestText
> 5 TextScript
> 6 OttavaBracket
> 7 TextSpanner
> 8 DynamicLineSpanner
> 9 VoltaBracketSpanner
> 10 TrillSpanner
>
> We get wrong result with 2.12.3:
> 1 RehearsalMark
> 2 MetronomeMark
> 3 VoltaBracketSpanner
> 4 BarNumber
> 5 TextScript
> 6 OttavaBracket
> 7 TextSpanner
> 8 DynamicLineSpanner
> 9 TrillSpanner
> 10 MultiMeasureRestText
>
> We get a different wrong result with 2.13.54:
> 1 RehearsalMark
> 2 MetronomeMark
> 3 VoltaBracketSpanner
> 4 TextScript
> 5 OttavaBracket
> 6 TextSpanner
> 7 DynamicLineSpanner
> 8 BarNumber
> 9 TrillSpanner
> 10 MultiMeasureRestText
>
> Frédéric
>
> _______________________________________________

I believe the documentation specifies that the Rehearsal, Metronome and 
Bar Number marks normally live in the Score context; to put them into 
your order, you need to take them out of Score and put them into Staff, 
per the note in NR 4.4.3.

Colin Campbell
Bug Squad

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