Re: Issue 1595 in lilypond: lilypond-book papersize gives margin warnings

[lilypond]

Comment #5 on issue 1595 by percival.music.ca: lilypond-book papersize  
gives margin warnings
http://code.google.com/p/lilypond/issues/detail?id=1595

I still think an *internal* (see later definition) paper size would work.

Steps:
1. latex tells lilypond-book how much horizontal space it can use.
2. lilypond-book does subtractions for quote and related options.
3. lilypond-book tells lilypond how much horizontal space it can use.
4. lilypond creates an image that corresponds to that horizontal space.

The problem is that at the moment step 3 is done in terms of line-width,  
but line-width does not include the instrument name (and other non-staff  
horizontal width).  I think that if lilypond-book told lilypond that the  
paper width was something like 150mm (not hard-coded; I'm just  
guesstimating what would be left on an a4 paper, after latex margins and  
lilypond-book margins like quote), then lilypond would / should be able to  
figure out that if it has an instrument name that's 25mm long and needs 5mm  
padding, then the staff line width should be 120mm.