Subscripted text and centering of TextSpanner line

Thu, 07 Oct 2010 22:26:11 -0700

If I have text characters at the left end of a TextSpanner, and some of those characters are subscripted, then the centering of the TextSpanner line seems to be calculated using the total height of both the main and subscripted text, which puts the line at the bottom of the main text rather than being centered on it. While this makes some sort of sense, I think that asking for the line to be centered means that I'm asking for it to be centered on the main text. 

%===========================================
\version "2.13.35"

#(set-global-staff-size 30)

\relative c'' {
\once \override TextSpanner #'bound-details #'left #'text = \markup { \concat { CII " " } } 
    \once \override TextSpanner #'style = #'line
    \once \override TextSpanner #'font-shape = #'upright
    \once \override TextSpanner #'direction = #UP
    \once \override TextSpanner #'bound-details #'right #'text =
        \markup { \draw-line #'(0 . -0.5) }
\once \override TextSpanner #'bound-details #'left #'stencil-align-dir-y = #CENTER 
    gis16\startTextSpan b e b' e e, b' e\stopTextSpan
    \once \override TextSpanner #'bound-details #'left #'text =
        \markup { \concat { "CII" \sub 3 " " } }
    \once \override TextSpanner #'style = #'line
    \once \override TextSpanner #'font-shape = #'upright
    \once \override TextSpanner #'direction = #UP
    \once \override TextSpanner #'bound-details #'right #'text =
        \markup { \draw-line #'(0 . -0.5) }
\once \override TextSpanner #'bound-details #'left #'stencil-align-dir-y = #CENTER 
    gis,,\startTextSpan b e b' e e, b' e\stopTextSpan
}
%===========================================

Nick

<<attachment: test.preview.png>>

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