Re: Issue 884 in lilypond: pageBreak resets page-count property

[lilypond]

Updates:
        Status: Started

Comment #9 on issue 884 by joeneeman: pageBreak resets page-count property
http://code.google.com/p/lilypond/issues/detail?id=884

Wow, I didn't realize this would be so controversial. The reason that it's  
non-trivial to go back to the old behaviour is that it didn't interact well  
with min-systems-per-page. The short version is this: in order for  
min-systems-per-page to interact properly with \pageBreak, we need[1] to  
deal with every \pageBreak-delimited region separately. Otherwise, you  
could have something like
.... \pageBreak c'1 c'1 \pageBreak ....
with min-systems-per-page = 2 and the algorithm wouldn't find a solution  
because the line breaker would (sensibly) always put the whole notes on the  
same line and the page breaker would only know that there aren't enough  
systems for min-systems-per-page to be happy, but it wouldn't see exactly  
where the extra systems needed to be. So I broke the page-breaking  
algorithm into one piece for each page break, but then, of course, it isn't  
possible to support some property that needs to see the whole book at once.

Anyway, perhaps it's possible to go back to the old version, with a  
different way of supporting min-systems-per-page.

[1] It's possible we don't actually need to, but it was certainly the  
simplest solution.