Text scripts on spacer notes. Was: Issue 135 in project lilypond

[Mats Bengtsson]

Can we turn this into a question: What's the best way to specify that a
TextScript attached to a spacer note does not occupy any horizontal space
(meaning that the bar lines are placed at the same place as if you 
didn't have
the text)?
The best I can come up with is
\override TextScript #'X-extent = #'(0 . 0)

However, this means that it isn't taken into account in the new fancy
collision avoidance.

A common situation where this is useful is when you have a tempo change
at a bar line and the instrumental part begins with a multi measure rest.
The following example illustrates four different solutions. The last one
is the only one that gives a really nice output, but I find it a bit 
embarrasing
for LilyPond that you can't get this layout without using such an ugly hack.

\version "2.10.0"
\relative c''' {
c1
% Nice handling of the text but wrong rest.
r1^\markup{"Andante molto"}
c1
% The text affects the bar lines
<< R1 s1^\markup{"Andante molto"} >>
c1
% Better, but the collision handling doesn't work
\once \override TextScript #'X-extent = #'(0 . 0)
<< R1 s1^\markup{"Andante molto"} >>
c1
% Desired layout, but ugly tweaks in the input:
<< R1 \once \override Rest #'transparent = ##t r1^\markup{"Andante 
molto"} >>
c1
}

  /Mats

address@hidden wrote:
> Issue 135: markup on spacer rests doesn't obey \emptyText
> http://code.google.com/p/lilypond/issues/detail?id=135
>
> Comment #1 by hanwenn:
> Disagree about this being a bug.
>
> emptyText sets constraints ('rods').
>
> In the absence of anything else (ie. notes), lily has to use some 
> basis for guessing a space.  It does
> so by taking the width of the papercolumn object,
> which is wide due to the fooooooo text.
>
>
> -----------&gt;8------------
> \version &quot;2.9.28&quot;
> \layout{
>  indent=0.   line-width=3.\cm}
> \relative c' {
> \emptyText
> c1\noBreak
> s1^\markup{&quot;foooooooo&quot;}
> c1
> }
>
>
>
>
>
> Issue attribute updates:
>     Status: Invalid

--
=============================================
        Mats Bengtsson
        Signal Processing
        Signals, Sensors and Systems
        Royal Institute of Technology
        SE-100 44  STOCKHOLM
        Sweden
        Phone: (+46) 8 790 8463                         
       Fax:   (+46) 8 790 7260
        Email: address@hidden
        WWW: http://www.s3.kth.se/~mabe
=============================================