Re: line breaks and broken beams

[Joe Neeman]

On Tue, 2009-10-27 at 12:06 -0700, Patrick McCarty wrote:
> On 2009-10-27, Joe Neeman wrote:
> > On Tue, 2009-10-27 at 01:54 -0700, Patrick McCarty wrote:
> > > On 2009-09-27, Werner LEMBERG wrote:
> > > > 
> > > > >> What's the reason that line breaks are by default forbidden if
> > > > >> there is a broken beam crossing the bar line, and that you have to
> > > > >> set the `breakable' flag manually to override it?
> > > > >>
> > > > >> BTW, it is very unpleasant that lilypond doesn't emit any kind of
> > > > >> warning if it produces an overlong staff caused by that issue.  It
> > > > >> silently accumulates unbreakable bars and happily walks out of the
> > > > >> right margin.  I would consider this behaviour a bug.
> > > > >
> > > > > +1.
> > > > >
> > > > > (I've always felt this way, too.)
> > > > 
> > > > Then let's drop the IMHO unfounded limitation of not breaking at beams
> > > > crossing a barline.
> > > 
> > > This would just require (I think) a revert of Han-Wen's commit
> > > a6f65c52e2a20cd64067da45945e485d74ac3105.
> > > 
> > > See the attached patch.  What do you think?
> > 
> > It should just be a matter of setting breakable to ##t by default in the
> > Beam grob.
> 
> Oops, thanks for catching that.  However, I found a comment in
> ly/declarations-init.ly:
> 
> %% FIXME
> %% should also set \override Beam #'breakable, but how to do it
> %% "portably"? (ie. also working with lyric sections)
> %%
> %% try \once \override Score.Beam #'breakable = ##t
> 
> 
> A real solution sounds more complicated, in other words.

Can you try to figure out what the problem is with lyrics? That is, what
happens for properly engraved scores and what happens in lilypond if you
set Beam #'breakable to ##t and whether the problem could be solved by
adding unbreakable-spanner-interface to LyricExtender or LyricHyphen
(see Spanner_break_forbid_engraver).

Cheers,
Joe