test.zsh

    # bug #380229
    ${str:$((${#a[1]}+1))}

    # from http://zshwiki.org/home/examples/hardstatus
    function title {
      if [[ $TERM == "screen" ]]; then
        # Use these two for GNU Screen:
        print -nR $'\033k'$1$'\033'\\

        print -nR $'\033]0;'$2$'\a'
      elif [[ $TERM == "xterm" || $TERM == "rxvt" ]]; then
        # Use this one instead for XTerms:
        print -nR $'\033]0;'$*$'\a'
      fi
    }

    function precmd {
      title zsh "$PWD"
    }

    function preexec {
      emulate -L zsh
      local -a cmd; cmd=(${(z)1})
      title $cmd[1]:t "$cmd[2,-1]"
    }

    caption always "%3n %t%? (%u)%?%?: %h%?"

    preexec() {
      emulate -L zsh
      local -a cmd; cmd=(${(z)1})             # Re-parse the command line

      # Construct a command that will output the desired job number.
      case $cmd[1] in
          fg)
            if (( $#cmd == 1 )); then
              # No arguments, must find the current job
              cmd=(builtin jobs -l %+)
            else
              # Replace the command name, ignore extra args.
              cmd=(builtin jobs -l ${(Q)cmd[2]})
            fi;;
           %*) cmd=(builtin jobs -l ${(Q)cmd[1]});; # Same as "else" above
           exec) shift cmd;& # If the command is 'exec', drop that, because
              # we'd rather just see the command that is being
              # exec'd. Note the ;& to fall through.
           *)  title $cmd[1]:t "$cmd[2,-1]"    # Not resuming a job,
              return;;                        # so we're all done
          esac

      local -A jt; jt=(${(kv)jobtexts})       # Copy jobtexts for subshell

      # Run the command, read its output, and look up the jobtext.
      # Could parse $rest here, but $jobtexts (via $jt) is easier.
      $cmd >>(read num rest
              cmd=(${(z)${(e):-\$jt$num}})
              title $cmd[1]:t "$cmd[2,-1]") 2>/dev/null
    }

    function precmd() {
      title zsh "$IDENTITY:$(print -P %~)"
    }

    "%{^[]0;screen ^En (^Et) ^G%}"

    print -nRP $'\033k%(!.#\[.)'$1$'%'$\(\(20\-${#1}\)\)$'< ..<'${${2:+${${${@[${#${@}}]##/*/}/#/ }:-}}//\"/}$'%(!.\].)\033'\\