Re: unicode fractions for barre indications

[Federico Bruni]

Il 23/12/2012 22:27, Federico Bruni ha scritto:
> Il 23/12/2012 21:06, Nick Payne ha scritto:
> > I believe only 1/6 and 5/6 exist as Unicode characters. In mathematical
> > notation one would use 1/3, 2/3, and 1/2, so 2/6, 4/6, and 3/6 are not
> > provided.
> >
> > I notate a barre with a partial indicator like so:
>
> Thanks for the reminder... I remember you had already posted it, lazy me!
> It's quite nice, even if you always have to specify the number of
> strings even for the default barré (6 strings).
>
> Can it be adapted to this function?
> http://lists.gnu.org/archive/html/lilypond-user/2012-12/msg00825.html
>
> I see that $strg must be replaced by $fretnum, but I don't know how to
> handle ly:music? and $music.

Thinking twice... I prefer using \startTextSpan and \stopTextSpan.
Using \barreX {} is handy but when the barré spans for many notes which 
have some other construct (like \repeat) the input is not that clear.

But I still want to use minimumFret for tablature. So I would use:

barre = #(define-music-function (parser location fretnum partial)
    (number? number?)
#{
  \set minimumFret = $fretnum
  \set restrainOpenStrings = ##t
  \once \override TextSpanner.bound-details.left.text =
    \markup\small\bold\concat { #(format #f "address@hidden" fretnum)
    \raise #0.8 \sub #(number->string partial) }
  \once \override TextSpanner.style = #'line
  \once \override TextSpanner.font-shape = #'upright
  \once\override TextSpanner.bound-details.right.text = \markup { 
\draw-line #'(0 . -1) }
  \once\override TextSpanner.bound-details.left.stencil-align-dir-y = #0.35
  \once\override TextSpanner.bound-details.left.padding = #-0.25
  \once\override TextSpanner.bound-details.right.padding = #-1
  \once\override TextSpanner.bound-details.right-broken.padding = #0.5
  \once\override TextSpanner.bound-details.left-broken.padding = #2
  \once\override TextSpanner.bound-details.left-broken.text = ##f
  \once\override TextSpanner.bound-details.right-broken.text = ##f
  \unset minimumFret
  \unset restrainOpenStrings
#})