Partial \framed

[Thomas Fehige <thomas@fehige.de>]

I'm trying to put a piece of text in a partial frame that's meant to 
look like square brackets aligned with the left and right edges of the 
textblock.

I tried to use two \framed constructions inside each other, the outer 
one with width=textwidth and negative toffset and boffset, the inner one 
with a smaller width, a fat rulethickness and the color of the 
background, expecting it to erase the outer frame where it's not needed:

\color[zier]{%

\framed[%

align=middle,

width=\textwidth,

                         toffset=-4mm,

boffset=-4mm,

strut=no,

]{%

\color[paper]{\framed[%

align=middle,

width=222mm, % i.e. \textwidth-4mm

                                 toffset=6mm,

boffset=5mm,

rulethickness=5mm

]{%

\color[zier]{\tfd \strut Here's the text that is menat to look 
important; its length/number of lines is undetermined.\strut}

}}%

}%

}%

... but it doesn't work. Apparently the inner frame is drawn before the 
outer one. Putting the wider frame inside the narrower results in 
alignment problems --  due to the overfull hbox, I presume.

Is  there a simple solution in ConTeXt that I haven't found yet, or will 
I have to try some plain TeX box magic myself?

Thanks -- Thomas
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