How to disable the mouse scrolling?

Help
1

I have the following line in my kakrc and yet when I scroll my mouse with the terminal in focus, the screen moves around.

set -add global ui_options terminal_enable_mouse=0

How can I disable the mouse scrolling?

2

That’s definitely the way to disable Kakoune’s mouse-event support.

If the running application does not ask the terminal for mouse events, and the terminal receives a scroll event from the mouse, it may send the application “up arrow” and “down arrow” events instead.

If mouse scrolling works in less, then that’s what’s going on.

I suppose you could map the up and down arrows to some do-nothing sequence to eat them, but it’s probably better to make the change in the terminal configuration.

3

Yes, screen scrolls in less. I use mate-terminal, any idea where I can suppress that scroll behavior?

4

You should be able to suppress it in a single terminal by running this shell command:

printf '\e[?1007l'

You can enable it with a similar command:

printf '\e[?1007h'

I don’t know if mate-terminal exposes that as a configuration option. xterm does, foot does, gnome-terminal does not, lxterminal does not, QTerminal does not (and does not respect the “disable” escape sequence), pterm does not (and doesn’t seem to support the feature at all).

5 
printf '\e[?1007l'

Whoa, that works. Thanks. Where did you learn about these arcane magic incantation to bend the kernel to your will?

6

I’d heard of that scroll-makes-arrow-presses feature, and if it was configurable anywhere it would be configurable in xterm so I checked out the xterm man page and found:

   alternateScroll (class ScrollCond)
           If “true”, the scroll-back and scroll-forw actions send  cursor-up  and
           -down  keys when xterm is displaying the alternate screen.  The default
           is “false”.

           The alternateScroll state can also be set using a control sequence.

If xterm has a control sequence, it would be in the Xterm Control Sequences documentation, so I searched for “alternateScroll” there and found:

CSI ? Pm h
      DEC Private Mode Set (DECSET).
      [...]
      Ps = 1 0 0 7  ⇒  Enable Alternate Scroll Mode, xterm.  This
      corresponds to the alternateScroll resource.

 [...]

CSI ? Pm l
      DEC Private Mode Reset (DECRST).
      [...]
      Ps = 1 0 0 7  ⇒  Disable Alternate Scroll Mode, xterm.  This
      corresponds to the alternateScroll resource.

I happen to know that CSI is \e[ for printf, so I could guess that printf '\e[?1007h' and printf '\e[?1007l' would turn it on and off.

xterm is kind of the grandaddy of all modern terminals, so I’m not surprised that same control sequence worked in a bunch of other terminals too.

1 Like