bug#16961: left-char moves to beginning of line; visual-order-cursor-movement

bug#16961: left-char moves to beginning of line; visual-order-cursor-movement

[David Reitter]

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X-Debbugs-cc: markoilcan@gmail.com

To reproduce this bug:

Start Emacs -Q (testing with mainline build dated Jan 29):

Paste the following:

——snip
(global-hl-line-mode)
(setq visual-order-cursor-movement t)
(visual-line-mode)

 asdasd
——snap

Note that “ asdasd” has a space at the beginning, and it needs to be the last line of the buffer.
Evaluate the first three expressions, place the text cursor at the end of the buffer (that is, after “asd”).

The line should be highlighted.  Now press `left’ (or do M-x left-char).

Point will jump to the beginning of the line.
Expected behavior is that it would move by just one char.



Begin forwarded message:

> From: M A <markoilcan@gmail.com>
> Subject: cursor movement error
> Date: March 6, 2014 at 5:55:29 PM EST
> To: aquamacs-bugs@aquamacs.org
> 
> When pressing the left arrow key when global-hl-line-mode is enabled and the cursor is at the very end of the buffer (no characters following it, including \n) and there is a space earlier in the line, instead of moving left a single characacter, the cursor moves a whole word.
> 
> 
> To replicate this:
> 1. Start aquamacs without customizations.
> 2. M-x global-hl-line-mode.
> 3. Type " testing" (note space before the word "testing").
> 4. Press left arrow key once.
> At this point the cursor is to the left of the space character before the word "testing" instead of before the letter "g".
> 
> In Aquamacs 3.0a GNU Emacs 24.3.50.2
> (x86_64-apple-darwin13.0.0, NS apple-appkit-1265.00)
>  of 2014-01-20 (Aquamacs-3.0a) on watson
> Git revision: Aquamacs-3.0a
> Operating System: OS X Version 10.7.5 (Build 11G63b)
> Configured using:
>  `configure --with-ns --without-x 'CFLAGS=-arch x86_64 -O3 -g
>  -mtune=corei7 -mmacosx-version-min=10.6' 'LDFLAGS=-arch x86_64 -O3 -g
>  -mtune=corei7 -mmacosx-version-min=10.6''
> 
> Important settings:
>   value of $LANG: en_US.UTF-8
>   locale-coding-system: utf-8-unix
>   default enable-multibyte-characters: t
> 
> 


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bug#16961: left-char moves to beginning of line; visual-order-cursor-movement

[Eli Zaretskii]

> From: David Reitter <david.reitter@gmail.com>
> Date: Fri, 7 Mar 2014 10:52:38 -0500
> Cc: markoilcan@gmail.com
> 
> Start Emacs -Q (testing with mainline build dated Jan 29):
> 
> Paste the following:
> 
> ——snip
> (global-hl-line-mode)
> (setq visual-order-cursor-movement t)
> (visual-line-mode)
> 
>  asdasd
> ——snap
> 
> Note that “ asdasd” has a space at the beginning, and it needs to be the last line of the buffer.
> Evaluate the first three expressions, place the text cursor at the end of the buffer (that is, after “asd”).
> 
> The line should be highlighted.  Now press `left’ (or do M-x left-char).
> 
> Point will jump to the beginning of the line.
> Expected behavior is that it would move by just one char.

HL Line Mode, the Mother Of All Evil...

Fixed in trunk revision 116701.

> > 1. Start aquamacs without customizations.
> > 2. M-x global-hl-line-mode.
> > 3. Type " testing" (note space before the word "testing").
> > 4. Press left arrow key once.
> > At this point the cursor is to the left of the space character before the word "testing" instead of before the letter "g".

Does this mean "Aquamacs without customizations" has
visual-order-cursor-movement set to t?  If so, I think it's not a good
idea at all: that variable is user-level customization, it shouldn't
be forced on the users.