Re: Trouble defining markup functiion

[Aaron Hill]

On 2019-01-17 6:27 am, Carl Sorensen wrote:
> I'm trying to define a markup function for establishing a common set
> of formatting for a number of text markups.
>
> %%% beginning of sample code
>
> \version "2.19.82"
>
> \displayScheme
> \markup{\sans{\fontsize #10 "C"}}  % Just used to show the scheme
> markup command -- this is what I'm trying
>
> #(define-markup-command  (chord-name-markup layout props chord-name) 
> (markup?)
>    "Display a chord name in the desired formatting"
>    (interpret-markup layout props
>      (make-line-markup (#:sans (#:fontsize 10 chord-name)))))
>
>
> \markup \chord-name-markup "E"
>
> %%% end of code
>
> I've used displayScheme to get the representation of the markup
> function.  I've found that is uses #:line so that I have to use
> make-line-markup.
>
> When I run this code, I get
>
> Processing
> `/var/folders/q5/88k2s1717qv1v7rq4tqz53k80000gn/T/frescobaldi-fmnvoopw/tmpc0ltmn4y/document.ly'
> Parsing.../var/folders/q5/88k2s1717qv1v7rq4tqz53k80000gn/T/frescobaldi-fmnvoopw/tmpc0ltmn4y/document.ly:9:32:
> In expression (#:fontsize 10 chord-name):
> /var/folders/q5/88k2s1717qv1v7rq4tqz53k80000gn/T/frescobaldi-fmnvoopw/tmpc0ltmn4y/document.ly:9:32:
> Wrong type to apply: #:fontsize
>
> Apparently, in the context of make-line-markup I can't use #:fontsize
> as the first element in a list, because it's not applyable.
>
> How can I do this properly?

I would sidestep trying to do the markup in pure Scheme and use #{ #} 
instead:

%%%%
#(define-markup-command  (chord-name-markup layout props chord-name) 
(markup?)
   "Display a chord name in the desired formatting"
   (interpret-markup layout props
     #{ \markup \sans \fontsize #10 $chord-name #}))
%%%%

NOTE: I omitted some of the curly braces, since they were not needed.


-- Aaron Hill