Re: Issue 4274: Fix a cyclic dependency in Rest_collision (issue 193590043 by address@hidden)

[Keith OHara]

On Wed, 28 Jan 2015 17:40:33 -0800, <address@hidden> wrote:

> Yes, the ledgered rest stuff is a big tangle.
> See https://codereview.appspot.com/200860043/ for the best I've been
> able to do without changing Rest_collision.

Shucks.
The similar issue with Accidentals (issue 3646) was not so bad.
There we could look up the stencil one, put it in the 'stencil property like 
usual for purposes of line spacing, and then just after line-breaking remove 
the accidentals on notes tied to a previous note on the same line.

I had hoped that for Rests we could look up a tentative glyph and put it in the 
'stencil for use in spacing, then after the last step of vertical position is 
done, substitute the ledgered glyph when appropriate.

I'll try to look at the new patch over the weekend, but if you didn't see a way 
to untangle the tangle I'm not likely to either.