Re: visual line mode

[Eli Zaretskii]

> From: Peter Dyballa <Peter_Dyballa@Web.de>
> Date: Sat, 13 Oct 2012 23:54:54 +0200
> Cc: Help-gnu-emacs@gnu.org
> 
> Create a file containing that line with TABS between "6)" and "von":
> 
>       Tausendschönchen (Sedmikrasky) (1966)                           von 
> Vera Chytilová
> 
> 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 Chytilová" 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 
> "Tausendschönchen" and then press CURSOR DOWN it jumps over all the TABs 
> after "(1966)" and lands on the "a" in "Very Chytilová" instead of the SPACE…

These are bugs.

> > 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).

I don't see this problem.

>       % \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 = RIGHT C-u C-x = RIGHT C-u C-x = RIGHT C-u C-x = 
> (this is exactly four times right on exactly one SPACE character)
> 
> The *Messages* buffer contains:
> 
>       Char: % (37, #o45, #x25) point=2577 of 37255 (7%) column=0
>       
>       Char: SPC (32, #o40, #x20) point=2578 of 37255 (7%) column=1
>       
>       Char: SPC (32, #o40, #x20) point=2579 of 37255 (7%) column=2
>       
>       Char: SPC (32, #o40, #x20) point=2580 of 37255 (7%) column=3
>       
>       Char: SPC (32, #o40, #x20) point=2581 of 37255 (7%) column=4

I don't see this, either.  I get the correct characters shown in the
echo area and in *Messages*.

> 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 “Six Of A Kind”, who explains at a billiard pool why he carries the 
> honourable name "Honest".

It will never be that.