tmux.conf

# Variables {{{
  is_vim="ps -c -o state= -o command= -t #{pane_tty} | grep -iqE '^\\S+ +n?vim$'"
# }}}

# Settings {{{
  setw -g  mode-keys                vi
  set  -g  status                   off
  set  -g  pane-border-style        fg="#9EC400"
  set  -g  pane-active-border-style fg="#666666"
  set  -g  focus-events             on
  set  -g  default-shell            /opt/homebrew/bin/fish
  set  -g  default-command          /opt/homebrew/bin/fish
  set  -g  prefix                   C-a
  set  -sg escape-time              1
  set  -g  base-index               1
  set  -g  renumber-windows         on
# }}}

# Keybindings {{{
  bind C-d kill-window
  bind c   new-window           -c '#{pane_current_path}'
  bind q   split-window -v -l 6 -c '#{pane_current_path}'
  bind -   split-window -v      -c '#{pane_current_path}'
  bind \\  split-window -h      -c '#{pane_current_path}'
  bind [   swap-pane    -U
  bind ]   swap-pane    -D
  bind a   copy-mode
  bind k   killp
  bind s   setw         synchronize-panes
  bind e   send-keys    C-l
  bind r   source-file  ~/.config/tmux/tmux.conf

  bind-key -T copy-mode-vi y      send -X copy-pipe-and-cancel 'pbcopy'
  bind-key -T copy-mode-vi Enter  send -X copy-pipe-and-cancel 'pbcopy'
  bind-key -T copy-mode-vi v      send -X begin-selection
  bind-key -T copy-mode-vi H      send -X start-of-line
  bind-key -T copy-mode-vi L      send -X end-of-line
  bind-key -T copy-mode-vi K      send -X previous-paragraph
  bind-key -T copy-mode-vi J      send -X next-paragraph
  bind-key -T copy-mode-vi Escape send -X cancel
  bind-key -T copy-mode-vi /      command-prompt -i -p ">" "send -X search-forward-incremental %1"
  bind-key -T copy-mode-vi ?      command-prompt -i -p ">" "send -X search-forward-incremental %1"

  bind-key -n C-h   if $is_vim { send-keys C-h } { if -F '#{pane_at_left}'   {} { select-pane -L } }
  bind-key -n C-j   if $is_vim { send-keys C-j } { if -F '#{pane_at_bottom}' {} { select-pane -D } }
  bind-key -n C-k   if $is_vim { send-keys C-k } { if -F '#{pane_at_top}'    {} { select-pane -U } }
  bind-key -n C-l   if $is_vim { send-keys C-l } { if -F '#{pane_at_right}'  {} { select-pane -R } }
  bind-key -n C-S-h if $is_vim { send-keys C-S-h } { resize-pane -L 6 }
  bind-key -n C-S-j if $is_vim { send-keys C-S-j } { resize-pane -D 3 }
  bind-key -n C-S-k if $is_vim { send-keys C-S-k } { resize-pane -U 3 }
  bind-key -n C-S-l if $is_vim { send-keys C-S-l } { resize-pane -R 6 }
# }}}