Some features for i3 parity

[rickymagner]

Hi, thanks for this awesome tool! This is the best tiling window experience I've tried on MacOS. Coming from i3 on Linux, there are a few key features I think would really push this tool to near perfect parity with i3, ordered by how useful I think they would be. Please let me know if these features already exist and I haven't enabled them properly. Since discussions are meant to be precursors to issues in the repo, it might be nice to have a centralized "i3 parity roadmap" if that's a goal for the project, to collect these and any other outstanding issues to get the two tools aligned.

Major Feature Requests

These are major suggestions that would greatly elevate the AeroSpace experience compared to i3, in my opinion.

1. Allow setting similar to i3's workspace_auto_back_and_forth. I know the mod + tab default can jump back to previous workspace, but in i3 I use the "double tap workspace to jump back" constantly when I'm quickly flicking over to another workspace to check something, and then want to return to my work, with minimal finger movement on the keyboard.
2. Native "focus follows mouse" setting. Echoing this discussion here, which I think is one of the best features i3 has that AeroSpace is still lacking.
3. Allow jumping between workspaces across monitors with focus left, etc based on monitor layout. I'm not sure how difficult this is to implement, but in i3 it's great to have e.g. ws1 on the left and ws2 on the right, and jump between them with focus left/right, or even throw windows across monitors with these and not needing to know the corresponding workspace name.

Small Improvements (similar to i3)

These are minor things I've found inconvenient (or even arguably bugs in some cases) compared to the i3 experience.

1. Reattaching browser tabs can be difficult in tiling mode. I've only tried this with Brave, but when I drag a tab out of the window it snaps into tiling mode as expected, but reattaching it can be a problem. On i3, dragging the tab across the windows works fine, but in AeroSpace the underlying window "jumps away" as it tries to reposition the tiled windows. I'm not even sure how i3 gets away with this, but maybe this is a MacOS quirk with window dragging. Usually I can hack a fix by going fullscreen and then dragging the tab I want to reattach, but it doesn't always work and is a bit messy.
2. In i3, closing the last window in a workspace doesn't move you to another active workspace, and it could be nice to have a config setting to override this behavior and allow the empty workspace to persist. Sometimes I find it disorienting to be thrown to another random workspace with a different window after just closing a window.
3. With multiple monitors, the centering of the mouse when focus is changed can be a little annoying in the following case: suppose you're focused on monitor 1, but want to click the MacOS menu bar on monitor 2 (because your mouse was over there already, and the focus didn't follow mouse as discussed above). I've been in this case a bunch, and find it a little frustrating that the mouse will then jump right to the center. In this case, it would likely be fixed by implementing "focus follows mouse" along with changing how on-focus-changed = ['move-mouse window-lazy-center'] config works. In the majority of cases, that is the behavior I want, but being able to e.g. distinguish if focus is changed via a keyboard shortcut (e.g. focus left across a monitor) vs by following the mouse would be key to making this work smoothly.
4. (Very minor) Allowing a variable in the config for the mod key like i3 would've been nice when I was experimenting with different mod key configs earlier. :)

Thanks again for the tool! Excited to see how it develops further.