use kitty conditional mappings

doc/smart-splits.txt

@@ -484,9 +484,6 @@ KITTY                                                     *smart-splits-kitty*
   [!NOTE] The `config.at_edge = 'wrap'` option is not supoprted in Kitty
   terminal multiplexer due to inability to determine pane layout from CLI.
 
-  [!NOTE] This won't work if the pane is connected over SSH, as the pane will
-  not properly report the foreground process name.
-
 Add the following snippet to `~/.config/kitty/kitty.conf`, adjusting the
 keymaps and resize amount as desired.
 
@@ -502,17 +499,20 @@ keymaps and resize amount as desired.
     map alt+h kitten pass_keys.py relative_resize left  3 alt+h
     map alt+l kitten pass_keys.py relative_resize right 3 alt+l
 <
-By default, it matches against the name of the current foreground process to
-detect if `vim`/`nvim` is running. If that doesn't work for you, or you want
-to include other CLI/TUI programs in the exclusion, you can provide an
-additional regex argument:
+By default the nvim plugin sets a kitty user-var `in_editor` via autocmd when
+the plugin loads. You can take advantage of this together with kittys
+[conditional mappings feature](https://sw.kovidgoyal.net/kitty/mapping/#conditional-mappings-depending-on-the-state-of-the-focused-window)
+
+    map ctrl+j neighboring_window down
+    map ctrl+k neighboring_window up
+    map ctrl+h neighboring_window left
+    map ctrl+l neighboring_window right
+
+    map --when-focus-on var:in_editor ctrl+j
+    map --when-focus-on var:in_editor ctrl+k
+    map --when-focus-on var:in_editor ctrl+h
+    map --when-focus-on var:in_editor ctrl+l
 
->
-    map ctrl+j kitten pass_keys.py neighboring_window bottom ctrl+j "^.* - nvim$"
-    map ctrl+k kitten pass_keys.py neighboring_window top    ctrl+k "^.* - nvim$"
-    map ctrl+h kitten pass_keys.py neighboring_window left   ctrl+h "^.* - nvim$"
-    map ctrl+l kitten pass_keys.py neighboring_window right  ctrl+l "^.* - nvim$"
-    
     # the 3 here is the resize amount, adjust as needed
     map alt+j kitten pass_keys.py relative_resize down  3 alt+j "^.* - nvim$"
     map alt+k kitten pass_keys.py relative_resize up    3 alt+k "^.* - nvim$"
@@ -578,4 +578,4 @@ currently in use. The API offers the following methods:
     ---@field type 'tmux'|'wezterm'|'kitty'
 <
 
-vim:tw=78:ts=8:ft=help:norl:
+vim:tw=78:ts=8:ft=help:norl:

kitty/pass_keys.py

@@ -1,18 +1,15 @@
-import re
-
 from kittens.tui.handler import result_handler
 from kitty.key_encoding import KeyEvent, parse_shortcut
 
 
 def is_window_vim(boss, window):
     vars = boss.call_remote_control(window, ('set-user-vars', f'--match=id:{window.id}'))
     for var in vars.split('\n'):
-        if var.startswith('IS_NVIM'):
+        if var.startswith('in_editor'):
             return True
         else:
             return False
 
-
 def encode_key_mapping(window, key_mapping):
     mods, key = parse_shortcut(key_mapping)
     event = KeyEvent(
@@ -102,7 +99,5 @@ def handle_result(args, result, target_window_id, boss):
         for keymap in key_mapping.split(">"):
             encoded = encode_key_mapping(window, keymap)
             window.write_to_child(encoded)
-    elif action == 'neighboring_window':
-        boss.active_tab.neighboring_window(direction)
     elif action == 'relative_resize':
         relative_resize_window(direction, amount, target_window_id, boss)

lua/smart-splits/mux/kitty.lua

@@ -98,7 +98,19 @@ function M.resize_pane(direction, amount)
 end
 
 function M.on_init()
-  os.execute('kitten @ set-user-vars IS_NVIM=true')
+  vim.api.nvim_create_autocmd('VimEnter', {
+    group = vim.api.nvim_create_augroup('KittySetVarVimEnter', { clear = true }),
+    callback = function()
+      io.stdout:write('\x1b]1337;SetUserVar=in_editor=MQo\007')
+    end,
+  })
+
+  vim.api.nvim_create_autocmd('VimLeave', {
+    group = vim.api.nvim_create_augroup('KittyUnsetVarVimLeave', { clear = true }),
+    callback = function()
+      io.stdout:write('\x1b]1337;SetUserVar=in_editor\007')
+    end,
+  })
 end
 
 function M.split_pane(_, _)