question about interaction b/w textwidth and conceal

I'm using conceal to hide portions of web links in my documents. I
use textwidth of 80 to automatically add line breaks.

The problem I have is that the "concealed" parts of weblinks counts as
part of the 80 characters used by textwidth. So if I have a long link
that is largely concealed, showing just a few characters on the
display, the linebreak can be added at a point that is far less than
column 80.

I don't want the concealed text counted as part of the textwidth
count. Is there some setting to avoid that behavior, i.e., to have
only visible characters be used for textwidth?

Thanks,

Herb Sitz

Example below:
------------------------------------------------
This is actual text of a line:

[[http:///www.this_is_a_long_url_description_that_is_concealed.com]
[LINK DESCRIPTION]]

This is text that is displayed when 'conceal' is on:

LINK DESCRIPTION

I would like to have text to right of link description on the line,
but when using textwidth it will immediately break into a new line,
because counting hidden characters line length goes over textwidth.
-----------------------------------------------

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