function title {
  emulate -L zsh
  setopt prompt_subst

  [[ "$EMACS" == *term* ]] && return

  : ${2=$1}

  case "$TERM" in
    cygwin|xterm*|putty*|rxvt*|ansi)
      print -Pn "\e]2;$2:q\a"
      print -Pn "\e]1;$1:q\a"
      ;;
    screen*|tmux*)
      print -Pn "\ek$1:q\e\\"
      ;;
    *)
      if [[ -n "$terminfo[fsl]" ]] && [[ -n "$terminfo[tsl]" ]]; then
	echoti tsl
	print -Pn "$1"
	echoti fsl
      fi
      ;;
  esac
}

function omz_termsupport_precmd {
  emulate -L zsh

  title '%15<..<%~%<<' '%n@%m: %~'
}

function omz_termsupport_preexec {
  emulate -L zsh
  setopt extended_glob

  local CMD=${1[(wr)^(*=*|sudo|ssh|mosh|rake|-*)]:gs/%/%%}
  local LINE="${2:gs/%/%%}"

  title '$CMD' '%100>...>$LINE%<<'
}

precmd_functions+=(omz_termsupport_precmd)
preexec_functions+=(omz_termsupport_preexec)