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- ESC[?u goes to every VT100-like terminal at attach, whatever the
  options.
- A reply turns on a new kittykeys terminal feature. Users can force
  it on or off with terminal-features kittykeys, including kittykeys@
  to turn it off.
- Changing extended-keys now takes effect immediately for attached
  clients (options.c).

Use, per client, when extended-keys is on: Kitty for clients that have
kittykeys, modifyOtherKeys for clients with extkeys, VT10x otherwise.

Pane side:

- Applications can request either protocol; Kitty wins if one asks for
  both.
- Each application gets what it asked for, whichever client typed the
  key.
- ESC[?u is answered truthfully.
- The per-client gate is gone. window.c and popup.c are simply
  master's versions again.

extended-keys always is back to its master meaning, forcing
modifyOtherKeys mode 1 only. Forcing Kitty on every program would have
sent bash ESC[97;5u for Ctrl-A.

extended-keys-format kitty is still accepted, but now behaves the same
as csi-u.
This commit is contained in:
Michael Grant
2026-09-19 07:32:57 +01:00
parent 7545954d00
commit d85329e5f0
17 changed files with 117 additions and 212 deletions
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@@ -114,14 +114,14 @@ CHANGES FROM 3.7c TO 3.8
* Change show-options and show-hooks to use formats and add a -F flag to each.
* Add support for the Kitty keyboard protocol, selected with a new kitty
value for the extended-keys-format option. This can report the Super and
Hyper modifiers (key name prefixes s- and H-) as well as Control, Meta
and Shift. The protocol is negotiated separately with each client, so
terminals with different capabilities may be attached at the same time;
clients without it use standard extended keys, or VT10x keys if those
are also unavailable, and their input is translated for applications
which have asked for Kitty encoding.
* Add support for the Kitty keyboard protocol. When extended-keys is on,
tmux uses it with terminals which support it, detected when a client
attaches or set with a new kittykeys terminal feature, and standard
extended keys or VT10x keys with other terminals, so terminals with
different capabilities may be attached at the same time. Programs inside
tmux may ask for either the Kitty protocol or modifyOtherKeys and get keys
in the form they asked for. The Kitty protocol can report the Super and
Hyper modifiers (key name prefixes s- and H-).
* Add a client_key_mode format giving the extended key reporting mode in
use for a client, alongside the existing pane_key_mode for a pane.