Am Sa., 19. Okt. 2019 um 14:45 Uhr schrieb David Kastrup <d...@gnu.org>:
>
> Thomas Morley <thomasmorle...@gmail.com> writes:
>
> > Am Sa., 19. Okt. 2019 um 13:35 Uhr schrieb David Kastrup <d...@gnu.org>:
> >>
> >> Thomas Morley <thomasmorle...@gmail.com> writes:
> >
> >> > Iiuc, you recommend to fix \underline to make it work with most simple
> >> > input like:
> >> >
> >> > \markup {
> >> > \override #'(offset . 12) \underline
> >> > \override #'(offset . 10) \underline
> >> > \override #'(offset . 8) \underline
> >> > \override #'(offset . 6) \underline
> >> > \override #'(offset . 4) \underline
> >> > "underlined"
> >> > }
> >> >
> >> > I'll have a look.
> >>
> >> No, to have it work with most simple input like
> >>
> >> \markup
> >> \underline
> >> \underline
> >> \underline
> >> \underline
> >> \underline
> >> "underlined"
> >
> > Ok, understood. I'll give it a try...
>
> I mean, I might well be too naive about this. If the underline is
> occuring in a fixed position with regard to the baseline, there are only
> a few obvious avenues to have multiple underlines work:
>
> a) change the baseline. That's not really acceptable when mixing
> underlined and non-underlined text
> b) change a property (akin to offset but probably unique to \underline
> to avoid unexpected interactions) for the sake of additional
> underline calls. That would result in the _innermost_ \underline call
> ending up lowest.
> c) somehow affect bounding box/outline in a manner that can be
> interpreted for moving the whole next underline to a different position
> while retaining the baseline. That's sort of the handwavy "do magic"
> option that may or may not be workable at all.
>
> --
> David Kastrup
I first tried to tackle the increasing widths of subsequent calls of
\underline and observed a so far not mentioned problem:
\underline increases the width of the returned stencil, so that
word-space adds its value to the _increased_ borders. This is better
visible with increased thickness:
\markup
\column {
\line
\override #'(thickness . 10)
\override #'(offset . 7)
{ This is a \underline underlining test }
\line { This is a \underline underlining test }
}
See attached image (the experimental code used there is not mature yet
and thus not posted here, p.e. appropriate y-offset is not coded)
The spacing of words looks uneven with default underline.
With the experimental code word-space is not affected, but the line
extends into this space.
Admittedly this is all more obvious with (very) thick lines, which is
likely a rare use-case.
Anyway, should I accept the uneven spacing or the lines sticking into
the space, provided by word-space?
I'd very much appreciate opinions
Thanks,
Harm
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