Re: \textLengthOn fails to allow text to align

[Phil Holmes]

"Trevor Daniels" <address@hidden> wrote in message 
news:address@hidden
> The predefined command \textLengthOn no longer always permits
> TextScripts to align.  I suspect it broke when the new skylining code
> was implemented, but I haven't verified this.
>
> \textLengthOn is defined to be
>
>  \override TextScript.extra-spacing-width = #'(0 . 0)
>  \override TextScript.extra-spacing-height = #'(-inf.0 . +inf.0)
>
> A workaround is to change extra-spacing-width to #'(0 . 0.2),
> but this seems a bit arbitrary.  So I'm not sure if the bug is in the
> skylining code or whether \textLengthOn just needs to be adjusted.
>
> The example in the snippet Vertically aligned dynamics and textscripts
> as it appears in the NR in section
> http://www.lilypond.org/doc/v2.17/Documentation/notation/expressive-marks-attached-to-notes#dynamics
> unfortunately now demonstrates this fault.
>
> Mike: could you please comment?
>
> Here's an example:
>
> music = \relative c' {
>  c2^\markup { \huge gorgeous } c^\markup { \huge fantastic }
> }
>
> \score {
> {
>  \music
>  \break
>  \textLengthOn
>  \override TextScript.Y-extent = #'(-1.5 . 1.5)
>  \override TextScript.staff-padding = #0.1
>  \music
>  \textLengthOff
>  \break
>  \override TextScript.Y-extent = #'(-1.5 . 1.5)
>  \override TextScript.staff-padding = #0.1
>  \override TextScript.extra-spacing-width = #'(0 . 0.2)
>  \override TextScript.extra-spacing-height = #'(-inf.0 . +inf.0)
>  \music
> }
> \layout {
>  ragged-right = ##t
>  indent = 0
> }
> }

Using this as a test:

music = \relative c' {
 a'2\p b\f
 e4\p f\f\> g, b\p
 c2^\markup { \huge gorgeous } c^\markup { \huge fantastic }
}

{
 \music
 \break
 \textLengthOn
 \override DynamicLineSpanner #'staff-padding = #2.0
 \override DynamicLineSpanner #'Y-extent = #'(-1.5 . 1.5)
 \override TextScript #'Y-extent = #'(-1.5 . 1.5)
 \music
}
\layout {
 ragged-right = ##t
 indent = 0
}

(almost the same as the snippet in the manual, but with an added 
\textLengthOn)

I get the words aligning in 2.17.0 but failing to align in 2.17.1

--
Phil Holmes
Bug Squad