Re: LSR categories

[Graham Percival]

Mats Bengtsson wrote:
> Why is scheme programming so special? If I, as an ordinary user, want to 
> solve
> a certain typesetting problem, I mostly don't have any idea if the 
> solution requires
> Scheme programming or not and at least as long as the solution can be 
> copy/pasted
> into my own file as it is, I wouldn't care.

I'm not talking about things like this:
date = #(strftime "%d-%m-%Y" (localtime (current-time)))

I was previously thinking about putting that in a special directory for 
security reasons -- since we don't use lilypond --safe to build the web, 
we don't want random scheme code in random files that are imported 
semi-automatically from user-editable sources.

However, we can avoid this problem by running lilypond--safe on the 
files whenever they are added (or modified) to the git tree.  So this is 
no longer a concern.

> What you probably have in mind is good examples to learn Scheme 
> programming,
> but unless these examples are very contrived they will also solve some 
> practical
> typesetting problem.

Yes.  If I'm a normal user looking for help on articulations, do I want 
to see the below example?  OTOH, if I'm an advanced user looking for 
help on scheme programming, do I want to browse through all the 
categories to find examples like this?   (ok, an advanced user would 
probably search LSR directly... but IMO, it would be still be nice to 
have a collection of these scheme examples on the website)


#(define (make-script x)
   (make-music 'ArticulationEvent
               'articulation-type x))

#(define (add-script m x)
   (if
     (equal? (ly:music-property m 'name) 'EventChord)
     (set! (ly:music-property m 'elements)
           (cons (make-script x)
                 (ly:music-property m 'elements))))
   m)

#(define (add-staccato m)
   (add-script m "staccato"))

\score {
  \relative c'' {
    a b \applymusic #(lambda (x) (music-map add-staccato x)) { c c }
  }
  \layout{ raggedright = ##t }
}