Re: Fixes NoteColumn vs SpanBar collisions. (issue 5323062)

[address@hidden]

On Nov 4, 2011, at 1:00 PM, Keith OHara wrote:

> On Fri, 04 Nov 2011 09:47:16 -0700, address@hidden <address@hidden> wrote:
> 
>> I think that it is easier to tweak this sort of thing of bar lines know 
>> about the existence of leftward-hanging grobs and can deal with them.
> 
> I guess it is more flexible if there is the option to have 
> 'extra-spacing-height be either
> #,time-signature::extra-spacing-height  or a pair like  #'(-1 . 1)
> 

Agreed, which is why I like growing this pure-from-neighbor infrastructure.  It 
lends itself to this type of flexibility.

>>>>> I agree it would be nice to change this, but did you really see the
>>>>> problem in real music?
>>>> 
>>>> I see the problem in my music (which I consider real music!).
>>>> 
>>> Wow.  Are you a minimalist?
>>> 
>> No.  Check out http://www.apollinemike.com/first.pdf .  This is one of the 
>> many pieces where these changes will be beneficial.
>> 
> I can't see where.  The lyrics already successfully slide under bar lines in 
> that piece.
> Looking harder, I see no span bars, and no accidentals hanging over bar 
> lines, no cross-staff stems.

It's the lyrics.  There are some very high notes where the lyrics don't tuck 
under the barline, which required me to make some extra-offset overrides 
(blech).

> 
>>> Purely relevant to what?  How can something be impurely relevant?
>> 
>> Pure relevant is used all over the code.
> Good point.  There is even a predicate 'pure-relevant?' defining which grobs 
> qualify.
> 

Exactly.  This is how the Pure_from_neighbor_engraver evaluates which grobs 
have pure height functions (line 49).

Cheers,
MS