Re: Let wordwrap-field and justify-field take non-strings?

[Thomas Morley]

Am So., 2. Dez. 2018 um 15:36 Uhr schrieb Thomas Morley
<address@hidden>:
>
> Am So., 2. Dez. 2018 um 15:09 Uhr schrieb David Kastrup <address@hidden>:
> >
> > Thomas Morley <address@hidden> writes:
> >
> > > Am So., 2. Dez. 2018 um 14:50 Uhr schrieb David Kastrup <address@hidden>:
> > >>
> > >> Thomas Morley <address@hidden> writes:
> > >>
> > >> > Hi,
> > >> >
> > >> > still musing about improving markup->string, I now stumbled across
> > >> > \wordwrap/justify-field.
> > >> >
> > >> > Both have a condition to return visible output only if the catched
> > >> > input is a string (using 'wordwrap/justify-string-markup' then),
> > >> > whereas \fromproperty accepts markup as well.
> > >> > Is this intended?
> > >> >
> > >> > One could go for markup? as well and use simple 
> > >> > 'wordwrap/justify-markup
> > >> > or
> > >> > One could do the condition as (not (string-null? (markup->string 
> > >> > ...))).
> > >> > (Currently markup->string will not return anything else than an empty
> > >> > string, as said I'm working on improvements)
> > >> >
> > >> > Opinions?
> > >>
> > >> A string is structured by spaces and newlines, a markup list has already
> > >> separated elements.  How would you naturally deal with single markups?
> > >
> > > That should become the duty of markup->string
> > > Like:
> > > single-markup = \markup \line \italic { Lorem ipsum dolor sit amet }
> > > #(write (markup->string single-markup))
> > > =>
> > > "Lorem ipsum dolor sit amet"
> >
> > But then any markup formatting of the fields would get lost without
> > warning?
>
> Well, indeed. This could be a feature or it could be undesired. Thus I
> asked for opinions.
> If we want to keep the formating we could probably do the same as in
> fromproperty.

Currently a formated markup will be dropped entirely without any warning, see:
\markup
  \override #`((foo . "Lorem") (buzz . ,#{ \markup \italic "ipsum" #}))
  \column {
      "from-property"
    \fromproperty #'foo
    \fromproperty #'buzz
    "wordwrap-field"
    \wordwrap-field #'foo
    \wordwrap-field #'buzz
    "justify-field"
    \justify-field #'foo
    \justify-field #'buzz
  }

Cheers,
  Harm