Make movement bindings DRYer and begin making them dynamic

wezterm.lua

@@ -39,26 +39,35 @@ config.keys = {
       end),
     }),
   },
-  {
-    key = 'h',
-    mods = 'CTRL|SHIFT',
-    action = wezterm.action.ActivatePaneDirection('Left'),
-  },
-  {
-    key = 'l',
-    mods = 'CTRL|SHIFT',
-    action = wezterm.action.ActivatePaneDirection('Right'),
-  },
-  {
-    key = 'k',
-    mods = 'CTRL|SHIFT',
-    action = wezterm.action.ActivatePaneDirection('Up'),
-  },
-  {
-    key = 'j',
-    mods = 'CTRL|SHIFT',
-    action = wezterm.action.ActivatePaneDirection('Down'),
-  },
 }
 
+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
+end
+
+for _, map in pairs({
+  { key = 'h', direction = 'Left' },
+  { key = 'l', direction = 'Right' },
+  { key = 'k', direction = 'Up' },
+  { key = 'j', direction = 'Down' },
+}) do
+  table.insert(config.keys, {
+    key = map.key,
+    mods = move_mods,
+    action = wezterm.action_callback(function(window, pane)
+      if send_key(window, pane) then
+        window:perform_action(
+          wezterm.action.SendKey({ key = map.key, modes = move_mods }), pane)
+      else
+        window:perform_action(
+          wezterm.action.ActivatePaneDirection(map.direction), pane)
+      end
+    end),
+  })
+end
+
 return config