Re: Access the first/last line of a markup

[Urs Liska]

Hi Aaron,

thank you for this example.

Am 11.03.19 um 17:20 schrieb Aaron Hill:
> On 2019-03-11 2:49 am, Urs Liska wrote:
> > Hi,
> > ...
>
> A *hack* using transparent glyphs to force alignment:
>
> %%%%
> \version "2.19.82"
>
> #(define-markup-command (ascender-descender-placeholder layout props) ()
>   (let* ((sten (interpret-markup layout props #{
>             \markup \transparent \overlay { d p } #} ))
>          (yex (ly:stencil-extent sten Y)))
>     (ly:make-stencil (ly:stencil-expr sten) empty-interval yex)))
>
> #(define-markup-command (apply-hack layout props arg) (markup?)
>   (interpret-markup layout props #{ \markup \concat {
>     \ascender-descender-placeholder $arg } #} ))
>
> bad = -\tweak color #(rgb-color 0.9 0 0) \etc
> good = -\tweak color #(rgb-color 0 0.8 0) \etc
>
> { \time 3/4
>   f'4\bad^"d" _"d" f'4\bad^"x" \bad_"x" f'4^"p" \bad_"p"
>   f'4\good^\markup \apply-hack "d" _\markup \apply-hack "d"
>   f'4\good^\markup \apply-hack "x" \good_\markup \apply-hack "x"
>   f'4^\markup \apply-hack "p" \good_\markup \apply-hack "p"
>   f'2.^\markup \override #'(line-width . 35) \wordwrap \apply-hack
>     { raucous racoon commune consume cocoa-cream macaroons }
>   _\markup \override #'(line-width . 35) \wordwrap \apply-hack
>     { museum owner unaware wax moose wears mauve mascara }
> }
> %%%%
>
> This presumes that "d" and "p" are suitable exemplars of ascenders and 
> descenders in the font being used.
>
> If you want to visualize what is happening, replace "\transparent" in 
> the markup command definition with something like "\with-color #blue".

Actually I don't find this that hacky, and it seems to do exactly what I 
want. I just have to integrate it into a different context, which didn't 
work out at the first attempt ...

Best
Urs