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From: brown@vidiot.UUCP (Vidiot)
Newsgroups: comp.windows.open-look,comp.lang.postscript
Subject: Re: Pageview problem
Message-ID: <1561@vidiot.UUCP>
Date: 30 Mar 91 04:35:29 GMT
References: <35@ftms.UUCP> <JJC.91Mar28210438@jclark.UUCP>
Reply-To: brown@vidiot.UUCP (Vidiot)
Organization: Vidiot's Hangout
Lines: 41

In article <JJC.91Mar28210438@jclark.UUCP> jjc@jclark.UUCP (James Clark) writes:
<
<I have had several people report this problem to me.  Apparently
<pageview gets confused by lines after the first line that begin with
<`%!'.  Note that such lines are allowed by the Document Structuring
<Conventions, so this is a bug in pageview.  If you compile groff
<(actually just ps/ps.c) with -DBROKEN_SPOOLER, it will, amongst other
<things, strip out any such lines.  In fact the Makefile explicitly
<says to use -DBROKEN_SPOOLER if you're going to be using pageview.
<(although it gave an incorrect reason for this in versions earlier
<than 1.01).

See previous posting about a cure for this problem, with what James points
out here as one of them.

But, I have to agree with the logic at Sun regarding how pageview works.
As pointed out in my previous posting, pageview considers the next instance
of %! to mean that another PostScript document has been included and to
ignore all comments until the next %%Trailer, which better be part of the
included document.  Then it will look at the comments again.  This idea
here, as I gather it, is that the included document is part of the page
that it is trying to display.  The included document should only really
be one page and part of the page it was included with.

Well, groff kind-of messes up that logic.  By adding the %! line again,
pageview thought that another PostScript file was included and rightfully
displayed everything until the %%Trailer came along.  In this case, there
wasn't an included document.  I agree with the person responsible for the
pageview code.  If the offending %! is edited from the groff document, the
document is displayed correctly, one page at a time.  With the -DBROKEN_
SPOOLER flag turned on, it too displays correctly.

I feel that groff should not put in the extra %! line at all.  It is the
only thing that fools pageview, no matter what the state of -DBROKEN_SPOOLER.
Either PostScript output will display correctly, except as noted.

I suspect that James will disagree with me, but it is what I believe.
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