Nathan Reed <nathaniel.r...@gmail.com> writes:
> Hello,
>
> I'd like to be able to compute the width of a markup inside a music function,
> so that I can size another element based on the size of the markup.
>
> I've figured out how to compute the size inside a markup command:
>
> (ly:stencil-extent (interpret-markup layout props (markup ...)) X)
>
> This returns a pair of extents, and the difference of the cdr and car is the
> width. This works great, but requires one to have the 'layout' and 'props'
> context, which one does not inside a music function. Is there some way to
> combine the two approaches? Or another way to get the width of a
> markup?
I find in the internals docs:
-- Function: ly:text-interface::interpret-markup
Convert a text markup into a stencil. Takes three arguments,
LAYOUT, PROPS, and MARKUP.
LAYOUT is a `\layout' block; it may be obtained from a grob with
`ly:grob-layout'. PROPS is an alist chain, i.e. a list of
alists. This is typically obtained with `(ly:grob-alist-chain
grob (ly:output-def-lookup layout 'text-font-defaults))'. MARKUP
is the markup text to be processed.
So that should work out if you have a grob already. No idea where you'd
get one.
--
David Kastrup
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