BSP Tiling

[LovesAsuna]

https://tuios.dev/docs/layout-modes

I found the "preselect" feature on this page to be intuitive, specifically when focusing on a window and then splitting it using the preselect direction. However, when I actually use it, regardless of where the focus is, the new window is always created in the lower right corner. I'm unsure if this is a bug or if I'm using the feature incorrectly.

[LovesAsuna]

[LovesAsuna]

The intuitive operation I understand should be as follows:

[Gaurav-Gosain]

Thanks for the report and the screenshots. You were using it correctly. This was a bug.

Here is how preselection is meant to work. A new window splits the focused window, and preselection lets you choose which side the new window goes on:

1. Focus the window you want to split.
2. Press Alt+h, Alt+j, Alt+k or Alt+l (Option on macOS) for left, below, above or right. A "Preselection: left" message confirms it.
3. Press n, or open a window any other way. The new window opens on that side of the focused window.

The next window uses up the preselection. A split key (- or |) replaces it with its own direction. Without a preselection, the tiling scheme picks the direction, and the new window still splits the focused one.

The bug was that tuios always split the last window in the layout, which is the bottom-right one with the default spiral scheme. In a normal daemon session it also dropped the preselection. Both are fixed in #349. The fix also makes the longest_side scheme measure the window it splits, and the V/H label in the dock now shows how the focused window will split.

The fix ships in v0.8.5, which is going out shortly. Thanks again for the clear screenshots. They made this easy to reproduce.