Vim Kitty Navigator

This plugin is a port of Chris Toomey's vim-tmux-navigator plugin. When combined with a set of kitty key bindings and kittens, the plugin will allow you to navigate seamlessly between vim and kitty splits using a consistent set of hotkeys.

Important

This plugin requires kitty v0.30.0 or higher.

Usage

This plugin provides the following mappings which allow you to move between Vim panes and kitty splits seamlessly.

• <ctrl-h> → Left
• <ctrl-j> → Down
• <ctrl-k> → Up
• <ctrl-l> → Right

If you want to use alternate key mappings, see the configuration section below.

Installation

Vim

If you don't have a preferred installation method, I recommend using vim-plug. Assuming you have vim-plug installed and configured, the following steps will install the plugin:

Add the following line to your ~/.vimrc file

Plug 'knubie/vim-kitty-navigator'

Then run

:PlugInstall

kitty

To configure the kitty side of this customization there are three parts:

1. Add pass_keys.py and get_layout.py kittens

Move both pass_keys.py and get_layout.py kittens to the ~/.config/kitty/ directory.

This can be done manually or with a vim-plug post-update hook:

Plug 'knubie/vim-kitty-navigator', {'do': 'cp ./*.py ~/.config/kitty/'}

The pass_keys.py kitten is used to intercept keybindings defined in your kitty conf and "pass" them through to vim when it is focused. The get_layout.py kitten is used to check whether the current kitty tab is in stack layout mode so that it can prevent accidentally navigating to a hidden stack window.

2. Add this snippet to kitty.conf

Add the following to your ~/.config/kitty/kitty.conf file:

map ctrl+j kitten pass_keys.py bottom ctrl+j
map ctrl+k kitten pass_keys.py top    ctrl+k
map ctrl+h kitten pass_keys.py left   ctrl+h
map ctrl+l kitten pass_keys.py right  ctrl+l

By default vim-kitty-navigator uses the name of the current foreground process to detect when it is in a (neo)vim session or not. If that doesn't work, (or if you want to support applications other than vim) you can supply a regular expression as a third optional argument to the pass_keys.py call in your kitty.conf file to match the process name.

map ctrl+j kitten pass_keys.py bottom ctrl+j "^.* - nvim$"
map ctrl+k kitten pass_keys.py top    ctrl+k "^.* - nvim$"
map ctrl+h kitten pass_keys.py left   ctrl+h "^.* - nvim$"
map ctrl+l kitten pass_keys.py right  ctrl+l "^.* - nvim$"

3. Make kitty listen to control messages

Start kitty with the listen-on option so that vim can send commands to it.

# For linux only:
kitty -o allow_remote_control=yes --single-instance --listen-on unix:@mykitty

# Other unix systems:
kitty -o allow_remote_control=yes --single-instance --listen-on unix:/tmp/mykitty

or if you don't want to start kitty with above mentioned command, simply add below configuration in your kitty.conf file.

# For linux only:
allow_remote_control yes
listen_on unix:@mykitty

# Other unix systems:
allow_remote_control yes
listen_on unix:/tmp/mykitty

Tip

After updating kitty.conf, close kitty completely and restart. Kitty does not support enabling allow_remote_control on configuration reload.

You can provide a kitty remote control password by setting the variable g:kitty_navigator_password to the desired kitty password, e.g.:

let g:kitty_navigator_password = "my_vim_password"

Tip

Mac users can learn more about command line options in kitty, from this link.

Configuration

Custom Key Bindings

If you don't want the plugin to create any mappings, you can use the five provided functions to define your own custom maps. You will need to define custom mappings in your ~/.vimrc as well as update the bindings in kitty to match.

Vim

Add the following to your ~/.vimrc to define your custom maps:

let g:kitty_navigator_no_mappings = 1

nnoremap <silent> {Left-Mapping} :KittyNavigateLeft<cr>
nnoremap <silent> {Down-Mapping} :KittyNavigateDown<cr>
nnoremap <silent> {Up-Mapping} :KittyNavigateUp<cr>
nnoremap <silent> {Right-Mapping} :KittyNavigateRight<cr>

Note

Each instance of {Left-Mapping} or {Down-Mapping} must be replaced in the above code with the desired mapping. Ie, the mapping for <ctrl-h> => Left would be created with nnoremap <silent> <c-h> :KittyNavigateLeft<cr>.

Navigating In Stacked Layout

By default vim-kitty-navigator prevents navigating to "hidden" windows while in stacked layout. This is to prevent accidentally switching to a window that is "hidden" behind the current window. The default behavior can be overridden by setting the g:kitty_navigator_enable_stack_layout variable to 1 in your ~/.vimrc

let g:kitty_navigator_enable_stack_layout = 1

Warning

Breaking changes

The latest version of this plugin requires kitty v0.30.0 or higher. This version introduced a new option to kitty @ focus-window that allows focusing a neighboring window.

Troubleshooting

If you are not able to navigate around vim, try the following:

1. Make sure you are using the latest version of Kitty.
2. Make sure you are using the latest commit of vim-kitty-navigator
3. Add a print statement in pass_keys.py between line 7 and 8 like this:

   def is_window_vim(window, vim_id):
    fp = window.child.foreground_processes
    print(fp)
    return any(re.search(vim_id, p['cmdline'][0], re.I) for p in fp)

4. Then run kitty in a debug mode:

   kitty --debug-keyboard
   

5. when the new window is opened, open up vim and some splits and try navigating around. When navigating your vim splits you should see some output similar to this:

   KeyPress matched action: kitten
   [{'pid': 97247, 'cmdline': ['nvim', '.'], 'cwd': '/Users/matt/.config/kitty'}]
   

   The 'cmdline': ['nvim', '.'] part will tell us the title of the vim window that we're using to match against in the script. Double check the regex in pass_keys.py, or the regex you passed in to kitty.confg with that title to make sure they match.