Re: lilypond book issues version 2.5.19

[Mats Bengtsson]

Bernard Hurley wrote:
> Mats Bengtsson wrote:
>
>
> > I don't realize what you would want to add between the staff lines.
> > Is it to circumvent some limitations in LilyPond? Otherwise you could
> > just as well tell LilyPond to add the information.
> > I think both me, Werner and others on the mailing list would find it
> > easier to realize why you find it useful if you are a bit more specific.
>
>
> First, I'm not sure what you mean by "between the staff lines". In the
> example I gave, prelude-d.ly is for clarinet and piano. I did not want
> to add anything between the clarinet and piano staffs or inside the
> piano grandstaff. 
Sorry, I means score lines (or systems if you prefer that nomenclature).

> Lilypond-book renders the first three bars (clarinet
> and piano together) in the first eps file, the next three in the next
> etc.. If I render the final LaTeX file, the fourth of these eps files is
> included at the top of page 2. Although I might guess that this will
> happen, neither I, LaTeX or LilyPond can know this in advance note also
> that changes both to the LilyPond score _and_ to my original LaTeX file
> can change this. Suppose I want to do something specific under the first
> system on each page (e.g. in a set of children's piano pieces I might
> want a picture of a dog) then I could do it easily if I could insert an
> appropriate LaTeX macro _between_ the \includegraphics calls. I could
> also include things like cross-references to other pages, bibliographic
> references etc.

That would be a fairly advanced macro if it's able to determine that
it's the first line of each page. Why not simply redefine
\includegraphics if you want to do some extra processing for each
included .eps file? If you want the original definition of
\includegraphics in the rest of the document and a special definition
only for the lilypond scores, then you could do the redefinition within
{pre,post}LilyPondExample. Another simple alternative is to write a
sed script that modifies the generated *-systems.tex file and inserts
whatever.

> Its not a matter circumventing any limitations of Lilypond, but of being
> able to use the full power of LaTeX. It would not be practical to add
> anything to LilyPond itself to get this functionality as using it would
> involve (at least) two calls to lilypond. Actually I already have this
> functionality (and more) as I call Lilypond from LyX, using a LyX
> converter that I am developing and this can do some post-processing on
> the file produced by lilypond-book. The code for the converter at the
> moment is a bit of a mess and is really only usable by me. I will
> release it sometime, but I will probably wait till the next version of
> LyX is released as that will change the way converters are handled.
> However life would be easier if it could be done with  a macro.

I'm just trying to help the LilyPond hackers to judge if your request
is of sufficiently general interest to be worth to implement and
support. So far, I have to say that your request looks fairly exotic
to me and I can't see that there would be a large group of users that
would use it.
If you prove me wrong, I'd be happy to change my mind (can't promise
about the main developers, though).

   /Mats