if [[ -n "$(which-command tmux)" ]]; then
  function clip-tmux() {
    tmux save-buffer -a - | clip
  }

  __C="$HOME/.local/share/bash-completion/tmux/completions/tmux"
  [[ -r $__C ]] && . <( cat $__C )
  unset __C

  function tmux-down() {
    tmux split-window "${@}"
  }

  function tmux-up() {
    tmux-down "${@}"; tmux swap-pane -dt -1
  }

  function tmux-right() {
    tmux split-window -h "${@}"
  }

  function tmux-left() {
    tmux-right "${@}"; tmux swap-pane -dt -1
  }
fi