Saul Farber ha scritto:
> Great question!  I'm not sure I have an answer...anyone else have any 
> great ideas?
> 
> I guess you could do some math in the <size> of the box.  Have it be 
> dependent on the length of the name string.  Anyone know how Hugo could 
> formulate that SLD expression?  <size><Mult><Func 
> name="length">STREET_NAME</Func><Literal>20</Literal></Mult></size
> 
> Is there a function to get the length of a string attribute?

strLength(attribute) does compute the number of chars.
Yet I'm not sure it's what you want, since the rendered width
of "MMMM" and "||||" is different.
Unfortunately afaik we do not have a function that does return
actual rendered width and height.

In fact, to provide a proper answer to this problem, a new
element similar to halo should be added to TextSymbolizer,
since it has the same function as a halo, that is, make
text easier to read... well, it could even be a Halo
new attribute.
Both would require changing published API in 2.2.x, so I'm
not sure we're speaking about a quick change (I doubt it...
everything handling styles would need to be changed as
an effect, parsers, encoders, implementations of the interface...)

Cheers
Andrea

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