Add support for no shift navigation keymaps

wezterm.lua

@@ -53,14 +53,26 @@ config.keys = {
   },
 }
 
-local move_mods = 'CTRL|SHIFT'
-local function send_key(window, pane)
-  -- TODO: Detect if tmux is running
-  -- Detect if vim/nvim is running
-  -- Failing that, check if there is only a single pane
-  return false
+local function send_move_key(window, pane)
+  -- TODO: Detect if vim/nvim is running
+  -- We can't use pane:get_foreground_process_info() because it appears to
+  -- contain info about the most recent process launched in the pane. During
+  -- testing this was lua-language-server.exe so obisouly can't be used to
+  -- determine if we're running inside neovim.
+  -- WezTerm supports the OSC 1337 SetUserVar escape sequence, this could be
+  -- used to inform WezTerm that neovim is running in a given tab.
+
+  if pane:get_user_vars()['vim'] ~= nil then
+    if pane:get_user_vars().vim ~= '1' then
+      return false
+    end
+  elseif #window:active_tab():panes() > 1 then
+    return false
+  end
+  return true
 end
 
+local move_mods = 'CTRL'
 for _, map in pairs({
   { key = 'h', direction = 'Left' },
   { key = 'l', direction = 'Right' },
@@ -71,9 +83,9 @@ for _, map in pairs({
     key = map.key,
     mods = move_mods,
     action = wezterm.action_callback(function(window, pane)
-      if send_key(window, pane) then
+      if send_move_key(window, pane) then
         window:perform_action(
-          wezterm.action.SendKey({ key = map.key, modes = move_mods }), pane)
+          wezterm.action.SendKey({ key = map.key, mods = move_mods }), pane)
       else
         window:perform_action(
           wezterm.action.ActivatePaneDirection(map.direction), pane)