Re: [Groff] pdfmark, URI and coordinates of output text

[Carlos J. G. Duarte]

Gaius Mulley wrote:

> Hi Carlos,
>
> you might find the \O1 request useful and the registers:
>
>    `opminx', `opminy', `opmaxx', and `opmaxy'
>
> basically the \O1 turns on glyph output (a nop in your case) but it
> also resets the above registers to -1. Once your text is emitted then
>  


Thx very much!
But it doesn't work quite the way I was hoping... when I try to access the
opminx (etc) registers, they got zero value sometimes, other times they have
wrong values(?).  But, if I use \O1 .. \O2 the printed values into 
stderr are
indeed correct. 
Example:
.de PSHREF
\\O1\\$1\\O2
.\" O2 sends correct values to stdout, then I reedit the file and 
manually place them (converted to points)
.\" here, to fill px0,1 and py0,1 . This works.
.nr px0 72
.nr px1 131
.nr py0 14
.nr py1 26
\X'ps: ... /Rect [\\n[px0] \\n[py0] \\n[px1]] ...uri stuff '
..
.lp
ola ola ola
.PSHREF "http://foobar.pt";
-----------------
But if I use \\O1\\$1 and then try to access opminx (etc), I get zero or 
wrong values.

Well, tecnically the above solution can be made to work, by using a two 
pass groff'ing.
The first collect the values, and then second replace them on the 
original input stream... ergh...

--
carlos