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- From: pcg@aber.ac.uk (Piercarlo Grandi)
- Newsgroups: comp.editors,alt.religion.computers,alt.religion.emacs
- Subject: Re: scroll up/down
- Message-ID: <PCG.93Jan10192305@decb.aber.ac.uk>
- Date: 10 Jan 93 19:23:05 GMT
- References: <SHIBUYA.93Jan7195820@chute.bl.applicon.slb.com>
- Sender: news@aber.ac.uk (USENET news service)
- Reply-To: pcg@aber.ac.uk (Piercarlo Grandi)
- Organization: Prifysgol Cymru, Aberystwyth
- Lines: 40
- In-Reply-To: shibuya@bl.applicon.slb.com's message of 8 Jan 93 00: 58:20 GMT
- Nntp-Posting-Host: decb.aber.ac.uk
-
- On 8 Jan 93 00:58:20 GMT, shibuya@bl.applicon.slb.com (Hiroto Shibuya) said:
-
- shibuya> I just came across a fundamental difference between Emacs and
- shibuya> VI, which I never noticed for a decade.
-
- shibuya> THEY SCROLL UP/DOWN IN DIFFERENT DIRECTION!
-
- This is not quite a correct statement. There is no difference.
-
- shibuya> Emacs command "scroll-up" scroll the text up so you see the
- ^^^^^^^^
- shibuya> text further down. VI command ^U, is described in the manual
- shibuya> as "scroll up", which scroll the text down so you see the text
- ^^^^^^^^
- shibuya> further up.
-
- What happens really, and none of the people in the followups I have read
- has pointed this out, is that Emacs scrolls the *text*, and vi scrolls
- the *screen* (window).
-
- The visual effect is on the intersection of the two (the current page);
- if you move the window up, holding the text still, you see the preceding
- page, and if you move the text up, holding the window still, you see the
- following page.
-
- References:
-
- In emacs if you "(describe-function 'scroll-up)", you get:
-
- scroll-up:
- Scroll text of current window upward ARG lines; [ ... ]
- ^^^^
-
- If you "man vi" you get:
-
- <CTRL/U> Pages up half screen.
- --
- Piercarlo Grandi, Dept of CS, PC/UW@Aberystwyth <pcg@aber.ac.uk>
- E l'italiano cantava, cantava. E le sue disperate invocazioni giunsero
- alle orecchie del suo divino protettore, il dio della barzelletta
-