Re: [Groff] pointsize changes in .NH ms-macro

[joerg van den hoff]

Keith Marshall wrote:

> On Monday 06 September 2004 8:06 pm, I wrote:
>
> > On Monday 06 September 2004 4:30 pm, joerg van den hoff wrote:
>
> .
> --------< snip >--------------------
>
> > > it looks like the pointsize for the current footer is that which is in
> > > the PS register valid on the top of the *next* page (more precisely: the
> > > PS register itself behaves unexpectedly (at least for me)). did I miss
> > > something or is this a bug?
> >
> > Not sure about it being a bug, but ...
> >
> > .de SHEAD
> > .\"inputs: $1: NH-level, $2: title
> > .\"------
> > .br
> > .nr incps 4-\\$1
> > .if \\n[incps]<0 .nr incps 0  \"just in case ...
> > .nr PS \\n(PS+\\n[incps]
> > .nr VS \\n(VS+\\n[incps]
> > .ne \\n(VSp
> > .NH \\$1
> > \\$2
> > .nr PS \\n(PS-\\n[incps]
> > .nr VS \\n(VS-\\n[incps]
> > .\"
> > ..
> >
> > ... would seem to give the effect you are looking for -- note the addition
> > of the .br and .ne requests.
>
>
> And further experimentation would suggest that it is the .br which is 
> critical -- .fl will also work in place of .br, but the .ne would appear to 
> be redundant!
>
> The .NH macro itself introduces a break, which springs the bottom of page 
> trap.  However, you have changed the point size *before* the trap is sprung, 
> so your new point size affects the footer and header text within the ensuing 
> page transition.  By forcing the break before the point size change, you 
> achieve the effect you desire.
>
> HTH.
>
> Best regards,
> Keith.
>
>
> _______________________________________________
> Groff mailing list
> address@hidden
> http://lists.gnu.org/mailman/listinfo/groff
keith,

thanks again for the help which solved (and explained) the problem in 
the first place. but:

in the attached expample the problem persists if, instead of a text 
body, a sufficiently large postscript file (I included one which is 
expected in the current directory where tt2.trf resides) is included 
with PSPIC. again the incorrect point size in the footer (and subsequent 
header) is only present if the next section starts at the top of the 
next page. this occurs now despite the fact that the .br is included in 
the .SHEAD definition.

any ideas (from anybody)?

best regards,

joerg

.pl 29.7c  
.ll 21c-2i
.   nr PO 1.25i
.   po    1.25i       \"enforce PO on first page without additional .bp
.   nr HM 1.0i
.   nr FM 1.0i
.   if !rLL .nr LL \n[.l]u  
.   nr LT \n(LL
.   nr PS 13
.   nr VS \n(PS+4
.\"
.ds LF "pointsize: 
\\n(PS------------------------------------------------------------------
.\"
.de SHEAD
.br
.\"inputs: $1: NH-level, $2: title
.\"------
.nr incps 4-\\$1
.if \\n[incps]<0 .nr incps 0  \"just in case ...
.nr PS \\n(PS+\\n[incps]
.nr VS \\n(VS+\\n[incps]
.NH \\$1
\\$2
.nr PS \\n(PS-\\n[incps]
.nr VS \\n(VS-\\n[incps]
.\"
..
.\"=============================================================================
.               SHEAD 1 "pointsize: \\n(PS
.\"=============================================================================
.PSPIC tt.ps
.LP
text text text text text text text text text text text text
.ig
text text text text text text text text text text text text
text text text text text text text text text text text text
text text text text text text text text text text text text
text text text text text text text text text text text text
..
.\"=============================================================================
.               SHEAD 1 "pointsize: \\n(PS
.\"=============================================================================
.LP
pointsize: \n(PS    test test test test test test test test test test test test 
test test test test
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tt.ps
Description: PostScript document