Suppose I have a fixed sized frame, say 3 y 4 cm. And I have a variable-length
text.
Would it be possible to write a macro that scaled the font and line height such
that the text will fit in the frame?
What I have now is very basic:
Fixed width
Typeset (METAPOST textext())
If too high
METAPOST: scale down so it fits in frame
But the scaling wil scale both height and width so it doesn’t only go to the
correct height, it also gets too narrow. Just scaling in the vertical direction
squashes the text/font.
What would be great is some way to have the font size and lineheight result
from TeX trying to fit it inside a predetermined size.
Doesn’t need to be perfect, a good approximation will do. I’ve been thinking
about using the surface size difference between desired box size and the result
of textext() as an approach to guess a right fontsize and line height.
What could make it possible for me too is a way to do a typeset command from
lua that gives me the box sizes of typesetting without actually typesetting it
to the true output of the job. Something like
typeset a piece of text without actually outputting it to the PDF output in a
width (say 4)
get the width and height of the result (say 4 x 6)
Adapt front size and lineheight (from 4x6 to 4x3 means a 50% reduction, which
may be too much as the result may have just a syllable on the last line)
typeset for real in 50% size
Is that doable? Or is there a better way?
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