Re: lyluatex: inline vertical alignment of

[Malte Meyn]

Am 11.05.2018 um 10:21 schrieb Malte Meyn:
> Am 10.05.2018 um 15:07 schrieb Urs Liska:
> > Hi Malte,
> >
> > don't know why my previous post got scrambled
>
> I don’t know either; my Thunderbird doesn’t show the text in HTML view 
> but in plaintext view it’s fine.
>
> > The problem is that in a cropped image we don't have a clue as to 
> > where the staff symbol is located vertically.
> > However, we *can* determine these values in LilyPond, if we find out 
> > the highest and lowest Y-extent values throughout the first system (we 
> > expect single-system scores only for inline inclusion).
> > A Scheme function could do that calculation and write it to an 
> > auxiliary file. From there we can go on towards a solution in lyluatex.
>
> It should be possible, yes. Somewhere in LilyPond there is some code 
> which makes skylines ;)

I found a way to do this for scores but not for toplevel markups. It’s 
not even a complicated calculation: just let 
VerticalAxisGroup.after-line-breaking print it’s Y-extent. Does this 
already help? I don’t know how much of this should be done in LilyPond 
and Lua/LuaLaTeX …

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

\version "2.19.81"

\layout {
  \override Score.VerticalAxisGroup.after-line-breaking =
  #(lambda (grob)
     (let ((extent (ly:grob-property grob 'Y-extent)))
       (display extent)
       (newline)))
}

markupScore =
#(define-scheme-function (mrkp) (markup?)
   #{
     \score {
       <>-#mrkp
       \layout {
         \context {
           \Staff
           \remove Clef_engraver
           \remove Time_signature_engraver
           \remove Staff_symbol_engraver
           \override TextScript.Y-offset = 0
         }
       }
     }
   #})

{ f }

{ f' }

{ \clef alto g }

\new RhythmicStaff c1

\markupScore "A"
\markupScore \markup "A"
\markupScore \markup \column { "A" "A" }
\markupScore \markup \general-align #Y #DOWN \column { "A" "A" }