Mac: End key unreliable

[Behodar]

Steps to reproduce

The "End" key doesn't work reliably on my machine.

1. Open a room with a decent amount of history.
2. Start scrolling up (such as with the scroll wheel). It appears that this bug is only triggered when you scroll up enough that it shows the "loading" spinner thingy, so keep scrolling until you see that.
3. Press the End key on the keyboard.

What happened?

What did you expect?

I expected this to return to the latest message in the room.

What happened?

It scrolled down, but by a seemingly-random amount. I had to press End multiple times to get to the bottom.

I noticed that #3232 mentions using Ctrl-End to jump to the bottom, and this appears to work correctly (I believe that that's the standard key combination for this action on Windows). However, I'd expect a Mac app to scroll all the way to the end when I press End by itself.

Operating system

macOS 11.4

Application version

Element 1.8.2

How did you install the app?

From https://element.io/get-started

Homeserver

matrix.org

Have you submitted a rageshake?

No

[dbkr]

The end key doesn't appear to do anything for me at all, regardless of whether I've seen the back-pagination spinner (page-up & page-down do the right thing though).

[dbkr]

Ah, this was because home & end only work if an element in the timeline has the focus, not if the composer has the focus. This may be related to that, ie could be something else stealing the focus when the pagination spinner appears. It does looks like the composer maps home & end to start/end of line which isn't strictly correct in macOS (although lots of apps appear to do it). Perhaps we should explicitly make it so End scrolls the timeline when the composer is focused (probably ignoring Home: it's what Messages does which has similar infinite back pagination behaviour).