Caps Lock no longer types <F22> into Neovim

Caps Lock sends F20, and the terminal passes it on as well as Wispr Flow
seeing it. tmux reads it as S-F10 and hands the pane ESC[21;2~, which Neovim
decodes as <F22> and, with nothing mapped to it, types out as text -- once per
repeat while the key is held.

Dropped in both places, each enough alone: Neovim maps <F20> and <F22> to
nothing, terminal mode included so a :terminal does not pass it to its shell,
and tmux binds S-F10 to an empty command, which also swallows a real
Shift+F10 that nothing here uses. The empty binding loads on tmux 3.5a and 3.4.

From change request cee596.

1 files changed, 13 insertions, 0 deletions

diff --git a/config/nvim/init.lua b/config/nvim/init.lua
index 3f094e8..89ab1b8 100644
--- a/config/nvim/init.lua
+++ b/config/nvim/init.lua
@@ -242,6 +242,19 @@ if not vim.g.lazy_bootstrapped then
 end
 
 ------------------------------------------------------
+---- Caps Lock key -----------------------------------
+------------------------------------------------------
+
+-- Caps Lock sends F20 (hammerspoon), which reaches Neovim as F22 through tmux.
+-- Neovim types the name of a function key nothing maps, so holding it filled
+-- the buffer with <F22>. Wispr Flow reads the key before the terminal does, so
+-- nothing is lost by dropping it here. Terminal mode too, or holding it in a
+-- :terminal would send the key on to the shell running there.
+for _, key in ipairs({ "<F20>", "<F22>" }) do
+	vim.keymap.set({ "n", "x", "s", "o", "i", "c", "t" }, key, "<Nop>")
+end
+
+------------------------------------------------------
 ---- Terminal ----------------------------------------
 ------------------------------------------------------