Re: penalty -> permission patch

[Han-Wen Nienhuys]

Joe Neeman wrote:
> On Sun, 7 May 2006 12:49, Han-Wen Nienhuys wrote:
> > Joe Neeman wrote:
> > > I'm not entirely sure what you mean by this. Are you thinking of having
> > > multiple Events? With a BreakEvent, PageBreakEvent and PageTurnEvent we
> > > could tweak break-permission, page-break-permission and
> > > page-turn-permission individually. Is this any nicer than having an
> > > explicit 'forbid symbol, though?
> > Yes, I think this is clearer.  I'd rename break-permission to
> > line-break-permission, though.
> >
> > We could figure out a way to combine these events in the input side in
> > single identifier, but let's keep them seperate for now, and worry about
> > the syntax later.
>
> OK, here's another try.

Does it run make web unscathed?

It looks good except for

> -       (breakable . #t)
> +       (line-break-permission . allow)
>         (X-extent . #f)
>         (Y-extent . #f)
>         (stencil . ,ly:line-spanner::print)
> @@ -705,7 +705,7 @@
>         (Y-offset . ,ly:staff-symbol-referencer::callback)
>         (break-align-symbol . key-cancellation)
>         (break-visibility . ,begin-of-line-invisible)
> -       (breakable . #t)
> +       (line-break-permission . allow)

there's a bit of confusion with the breakable property, because it both 
signals whether or not items are on nonmusical Paper_columns (see eg. 
the use of Item::is_breakable in separating-line-group-engraver.cc) and 
 to signal whether a nonmusical column is in fact eligible as a line 
break (for which line-break-permission is the right property).

I think it would be better to get rid of this double use, and have a
'line-break-permission which should be in spaceable-grob or perhaps 
paper-column, and is controlled with BreakEvents, while there also is a 
'non-musical property, part of item-interface.  (a better name for 
non-musical is of course welcome)



--

Han-Wen Nienhuys - address@hidden - http://www.xs4all.nl/~hanwen

LilyPond Software Design
 -- Code for Music Notation
http://www.lilypond-design.com