Fixes#1014
There were a couple overlapping issues here:
1. To determine the "unshifted" key, we were using `keyval_to_lower`.
This only works if the key is uppercase and not all layouts are
uppercase for the unshifted value.
2. If we couldn't case the unicode value of a key or unshifted key to
ASCII, we'd say the key was the same as the physical key. This is
incorrect because the physical key is always the layout of the
physical keyboard so for example with the Turkish layout on a US
keyboard, you'd get US letters when a key may only correspond to
non-US letters.
To fix the first issue, we are using map_keycode to map the hardware
keycode to all possible keyvals from it. We then use the currently
active layout to find the unshifted value.
To fix the scond issue, we no longer fallback to the physical key if
there was IM text or non-ASCII unicode values for the key.
I tested Turkish with #1014 and I tested Dvorak to make sure those
basics still work.
Fixes#965
When processing keybindings that closed the surface (`close_surface`,
`close_window`), the surface and associated runtime structures would be
freed so we could segfault.
This PR introduces a new enum result for input events (only key for now)
that returns whether an event resulted in a close. In this case, callers
can properly return immediately and avoid writing to deallocated memory.
This adds support for resizing splits via keybinds to the GTK runtime.
Code is straightforward. I couldn't see a way to do it without keeping
track of the orientation of the splits, but I think that's fine.
Before this change, it would crash when you had the following surfaces
split1
/ \
/ \
surf1 \
split2
/ \
surf2 surf3
and you'd want to split `surf1` again. Splitting `surf2` or `surf3`
would be fine, but surf1 would break things.
