Tests for either cross-staff or supported by cross-staff stems to skip elements in pure side-positi…

Tests for either cross-staff or supported by cross-staff stems to skip elements in pure side-position-interface height calculations

[MikeSol, 2013-08-15 06:46:16]

Never allows spanners to use cross staff grobs for side positioning

[Keith, 2013-08-15 07:29:43]

https://codereview.appspot.com/12921043/diff/3001/lily/side-position-interfac...
File lily/side-position-interface.cc (right):

https://codereview.appspot.com/12921043/diff/3001/lily/side-position-interfac...
lily/side-position-interface.cc:278: // do not use cross_staff elements as
supports of spanners
Well, I meant to suggest "do not use cross-staff elements as supports of objects
that are not cross-staff" whether said elements are spanners or not. 

The reason is simply order of decisions in layout: before staff-spacing we want
to lay out everything possible (everything that is not cross-staff) and then
place the cross-staff objects.

It would be nice in the future to have pedal brackets, for example, move away
from cross-staff beams and slurs, but doing so would make their position depend
on staff-layout, so probably they would need to inherit a cross-staff flag in
those cases.
http://www.mutopiaproject.org/cgibin/piece-info.cgi?id=1776

[MikeSol, 2013-08-15 07:38:44]

Prevents non-cross-staff elements from aligning to cross-staff elements

[mike7, 2013-08-15 07:39:27]

On 15 août 2013, at 10:29, k-ohara5a5a@oco.net wrote:

> 
>
https://codereview.appspot.com/12921043/diff/3001/lily/side-position-interfac...
> File lily/side-position-interface.cc (right):
> 
>
https://codereview.appspot.com/12921043/diff/3001/lily/side-position-interfac...
> lily/side-position-interface.cc:278: // do not use cross_staff elements
> as supports of spanners
> Well, I meant to suggest "do not use cross-staff elements as supports of
> objects that are not cross-staff" whether said elements are spanners or
> not.

Good call - patch up w/ this.

Cheers,
MS