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Posting-Version: version B 2.10.2 9/18/84; site cadre.ARPA
Path: utzoo!watmath!clyde!burl!ulysses!allegra!mit-eddie!think!harvard!seismo!rochester!cmu-cs-pt!cadre!km
From: km@cadre.ARPA (Ken Mitchum)
Newsgroups: net.micro.pc,net.micro,net.sources
Subject: Re: faster paging in JOVE
Message-ID: <514@cadre.ARPA>
Date: Wed, 18-Sep-85 11:26:02 EDT
Article-I.D.: cadre.514
Posted: Wed Sep 18 11:26:02 1985
Date-Received: Fri, 20-Sep-85 06:01:25 EDT
References: <513@cadre.ARPA>
Reply-To: km@cadre.ARPA (Ken Mitchum)
Distribution: net
Organization: Decision Systems Lab., University of Pittsburgh
Lines: 44
Xref: watmath net.micro.pc:5336 net.micro:12027 net.sources:3484

>
>	B) Replace the functions NextPage() and PrevPage() in draw.c with
>these versions:
>
>PrevPage()
>{
>	LINE	*newline;
>
>	if (exp_p)
>		DownScroll();
>	else {
>		newline = prev_line(curwind->w_top, curwind->w_height/3);
>		curwind->w_line = newline;
>		DotTo(newline, 0);
>#ifndef UNIX
>		CanScroll = 0;
>#endif
>	}
>}

While the above works, the following guarantees that a succession of
prev-page next-page commands will return to the same line:

PrevPage()
{
	LINE	*newline;
	int p = (curwind->w_height & 1) ? 1 : 2;

	if (exp_p)
		DownScroll();
	else {
		newline = prev_line(curwind->w_top, curwind->w_height/3 +p);
		curwind->w_line = newline;
		DotTo(newline, 0);
#ifndef UNIX
		CanScroll = 0;
#endif
	}
}

Sorry, but I did not discover the error until after the posting.

  -Ken Mitchum
  (km@cadre.arpa)


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