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From: Peter Dyballa <Peter_Dyba...@Web.de>
Newsgroups: gnu.emacs.help
Subject: Re: visual line mode
Date: Sat, 13 Oct 2012 23:54:54 +0200
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To: Eli Zaretskii <e...@gnu.org>
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Am 13.10.2012 um 09:41 schrieb Eli Zaretskii:

> (Why do you care about how columns
> increase/decrease?  For that matter, why do you turn on
> column-number-mode at all?)

Because columns play an important role in *shell* buffer: if the cursor =
or line length is around 1,000 it can happen that this lengthy command =
cannot be executed.

While trying to find this or that recipe you requested, I found that =
effect:

Create a file containing that line with TABS between "6)" and "von":

	Tausendsch=F6nchen (Sedmikrasky) (1966)				=
von Vera Chytilov=E1

Launch GNU Emacs with -Q and visit that file read-only. Activate visual =
line mode. Resize the frame's width to 15 columns ("C-a C-u 14 C-f" =
should put the cursor into the last, right-most column). Position the =
cursor at the SPACE in the name "Vera Chytilov=E1" and use the cursor =
movement keys to make the text cursor move upwards. In the visible line =
with TABs it will not go upwards but leftwards, in a left-to-right =
script one TAB backwards, as it will do on the visible line above, where =
UP makes it jump to column 0, i.e., left of "(1966)". On next UP it's =
back in the column where the cursor started.

When I position the text cursor with the mouse on the second "n" in =
"Tausendsch=F6nchen" and then press CURSOR DOWN it jumps over all the =
TABs after "(1966)" and lands on the "a" in "Very Chytilov=E1" instead =
of the SPACE=85


>=20
>> And while I was testing this behaviour again it happened that I could =
not position by means of the mouse the cursor onto every column of a =
long broken line, i.e., most columns, for example those of the first =
part or the beginning of the broken line, could not be reached.
>=20
> I have no problem with this when I try it now.  Does it happen for you
> in "emacs -Q", if you just turn on visual-line-mode?

I certainly have to click a lot more. What I encountered is that I =
clicked into column X on some line and repeatedly the text from the last =
column until where I clicked was high-lighted. Or when I clicked into =
column Y on some other line the text cursor was put into column (X - N).

>=20
>=20
>> And although I removed any white space on the lines after the (black) =
text had ended, I can see the cursor stay in that deleted white space:
>=20
> I cannot reproduce this.  Can you give a recipe?
>=20

I cannot reproduce that as well =96 because I failed to see that the =
text was

	% \DeclareGraphicsExtensions{.pdf,.png,.jpeg}

which was broken into what you see in the screen-shot. But what I can do =
with the text line

	% \DeclareGraphicsExtensions{.pdf,.png,.jpeg}	 % in pdfTeX =
allowed graphics formats

is:

a) position the cursor in column 0 on the "%"
b) perform RIGHT C-u C-x =3D RIGHT C-u C-x =3D RIGHT C-u C-x =3D RIGHT =
C-u C-x =3D (this is exactly four times right on exactly one SPACE =
character)

The *Messages* buffer contains:

	Char: % (37, #o45, #x25) point=3D2577 of 37255 (7%) column=3D0
=09
	Char: SPC (32, #o40, #x20) point=3D2578 of 37255 (7%) column=3D1
=09
	Char: SPC (32, #o40, #x20) point=3D2579 of 37255 (7%) column=3D2
=09
	Char: SPC (32, #o40, #x20) point=3D2580 of 37255 (7%) column=3D3
=09
	Char: SPC (32, #o40, #x20) point=3D2581 of 37255 (7%) column=3D4

And here is an excerpt, the end, of *Help* buffer:

 <down-mouse-1> <mouse-movement>
<mouse-1> C-a C-u C-x =3D <right> C-u C-x =3D <right> C-u
C-x =3D <right> C-u C-x =3D <right> C-u C-x =3D <down-mouse-1>
<mouse-movement> <mouse-1> <down-mouse-1> <mouse-movement>
<mouse-movement> <drag-mouse-1> <down-mouse-1> <mouse-movement>
<mouse-1> C-a <right> <right> <right> <right> <right>
<help-echo> <down-mouse-1> <mouse-1> C-x b * M e s
s <tab> <return> <up> <up> <up> <up> <up> <up> <up>
<up> <up> <up> <down-mouse-1> <mouse-movement> <mouse-1>
<down-mouse-1> <mouse-movement> <mouse-movement> <help-echo>
<mouse-movement> <mouse-movement> <mouse-movement>
<mouse-movement> <drag-mouse-1> <down-mouse-1> <mouse-movement>
<mouse-1> <help-echo> C-h l


Eli, right now and possibly the next few years I am not and shall not be =
interested in visual-line-mode. I don't like it and I shall not like it =
presumingly another few years long. Whether it has bugs or not =96 I =
don't care. During the described period of time I think working on =
visual-line-mode will be a waste of time for me. For me less annoying =
and more satisfying thing exist, so I am stopping now this thread for =
me. If you want, then I can send you the two files I used for "testing". =
I was using the Lucid/Xaw3d variant of a recently, 10.10., updated GNU =
Emacs 24.2.50.

I prefer to have a GNU Emacs that is as true and reliable as Honest =
John, the sheriff with the hat of the Mounted Police, played by W.C. =
Fields, in the film =93Six Of A Kind=94, who explains at a billiard pool =
why he carries the honourable name "Honest". (I also don't like =
org-mode. It's cheating as well. IMO. And I don't want to explain that =
and return to that trauma.) GNU Emacs should stay a reliable computer =
programme and not quantum physics where nothing is certain, only more or =
less likely. I like tools that *I* can control, not the other way round.
honourable
--
Greetings

  Pete

Be careful of reading health books, you might die of a misprint.
				=96 Mark Twain