On 26/02/2006, at 12:04 AM, Werner LEMBERG wrote:
I use me (the macro package, I mean) to produce these things and
more.
I can't comment on -me since I've never used it.
Then I'd like to try the MS package. Could you post the description of
the header/footer macros please?
Btw, the HT macro that Larry mentioned (HT, PT, BT) is not in
/usr/share/groff/1.18.1/tmac/s.tmac
The program also draws text at .sp |19.7c, that is 10 cm from the
bot of page, and the text's top is really at 10 cm height. A
smaller font at the same .sp |19.7c height plots something below the
10 cm mark. How do I explain this?
This one I can explain. From groff.info, after the explanation of the
.vs request (section `Changing Type Sizes'):
The effective vertical line spacing consists of four components.
Breaking a line causes the following actions (in the given order).
* Move the current point vertically by the "extra pre-vertical line
space". This is the minimum value of all `\x' escapes with a
negative argument in the current output line.
* Move the current point vertically by the vertical line spacing as
set with the `vs' request.
* Output the current line.
* Move the current point vertically by the "extra post-vertical
line space". This is the maximum value of all `\x' escapes with
a positive argument in the line which has just been output.
* Move the current point vertically by the "post-vertical line
spacing" as set with the `pvs' request.
[This information is quite hidden in groff.texinfo, I know -- patches
are welcome to move it to a separate (sub)subsection, with proper
links from various places to this new node.]
BTW, this isn't new code; groff has always been working like this.
For your example it means that groff, after the `.sp |19.7c'
instruction, moves down the current amount of the vertical spacing as
set with .vs, *then* outputting the `HELLO' string.
You probably get a better understanding if you use this code fragment,
setting the vertical spacing to zero:
.ps 51.54
.sp |19.7c
.vs 0
HELLO
.br
.ps 25.75
.sp |19.7c
\m[red]HELLO\m[]
.br
.vs
Werner
Thanks, this explains it. I think I'll use these macros in lieu of .sp
|xx:
.de y-down
. sp |\\$1-\\n[.v]u
..
.de y-up
. sp |\\n[.p]u-\\$1-\\n[.v]u
..
Based on the man pages I thought that .ps |xxx was setting the height
excactly/absolutely at xxx from the top.
Perhaps a sentence in "man" would be welcome to explain what really
happens.
Miklos
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