Simplify key dispatch code.
Previously we would maintain a cache of key matchers for each context
that
would store the pending input. For the last while we've also stored the
typed prefix on the window. This is redundant, we only need one copy, so
now
it's just stored on the window, which lets us avoid the boilerplate of
keeping
all the matchers in sync.
This stops us from losing multikey bindings when the context on a node
changes
(#11009) (though we still interrupt multikey bindings if the focus
changes).
While in the code, I fixed up a few other things with multi-key bindings
that
were causing problems:
Previously we assumed that all multi-key bindings took precedence over
any
single-key binding, now this is done such that if a user binds a
single-key
binding, it will take precedence over all system-defined multi-key
bindings
(irrespective of the depth in the context tree). This was a common cause
of
confusion for new users trying to bind to `cmd-k` or `ctrl-w` in vim
mode
(#13543).
Previously after a pending multi-key keystroke failed to match, we would
drop
the prefix if it was an input event. Now we correctly replay it
(#14725).
Release Notes:
- Fixed multi-key shortcuts not working across completion menu changes
([#11009](https://github.com/zed-industries/zed/issues/11009))
- Fixed multi-key shortcuts discarding earlier input
([#14445](https://github.com/zed-industries/zed/pull/14445))
- vim: Fixed `jk` binding preventing you from repeating `j`
([#14725](https://github.com/zed-industries/zed/issues/14725))
- vim: Fixed `escape` in normal mode to also clear the selected
register.
- Fixed key maps so user-defined mappings take precedence over builtin
multi-key mappings
([#13543](https://github.com/zed-industries/zed/issues/13543))
- Fixed a bug where overridden shortcuts would still show in the Command
Palette
