kitty: add basic modal bindings

Author: llakala

apps/shell/kitty.nix

@@ -45,6 +45,34 @@
 
   };
 
+  # Modal bindings for managing tabs
+  hm.programs.kitty.extraConfig =
+  /* bash */
+  ''
+    # Flags have to be before the actual binding to work
+    # Doing something unknown leaves the mode
+    map --new-mode mt --on-unknown end ctrl+k
+
+    # Exit mode automatically when creating/deleting tabs
+    map --mode mt t combine : new_tab : pop_keyboard_mode
+    map --mode mt d combine : close_window : pop_keyboard_mode
+
+    map --mode mt h previous_tab
+    map --mode mt l next_tab
+    map --mode mt shift+h move_tab_backward
+    map --mode mt shift+l move_tab_forward
+
+    map --mode mt k scroll_line_up
+    map --mode mt j scroll_line_down
+    map --mode mt shift+k scroll_to_prompt -1
+    map --mode mt shift+j scroll_to_prompt 1
+
+    # Exit mode
+    map --mode mt i pop_keyboard_mode
+    map --mode mt esc pop_keyboard_mode
+
+  '';
+
   # Open terminal with Super+T
   hm.dconf.settings."org/gnome/settings-daemon/plugins/media-keys".custom-keybindings =
   [