D1665.bashrc2

# -*- mode: sh-bash -*-

type=fix3b

if [[ $type == rep-c2w-auto-fail ]]; then
  source out/ble.sh --norc

  getCPos() {
    local v=() t=$(stty -g)
    stty -echo
    printf "\033[6n"
    IFS='[;' read -ra v -d R
    stty $t
    CPos=(${v[@]:1})
  }

  custom_prompt() {
    getCPos
    if [ $CPos -eq 1 ]; then
      PS1=""
    else
      PS1="\n"
    fi
  }
  PROMPT_COMMAND=custom_prompt

  ble-attach
fi

#------------------------------------------------------------------------------

if [[ $type == rep-c2w-auto-fail-min ]]; then
  source out/ble.sh --norc
  getCPos() {
    local v=() t=$(stty -g)
    stty -echo
    printf "\033[6n"
    IFS='[;' read -ra v -d R
    stty $t
    CPos=(${v[@]:1})
  }
  PROMPT_COMMAND=getCPos
fi

#------------------------------------------------------------------------------

if [[ $type == fix-exclude-blesh ]]; then
  custom_prompt() {
    cmd_cde=$?
    window_title
    if ! ble 2>/dev/null; then
      getCPos
      if [ $CPos -eq 1 ]; then
        PS1=""
      else
        PS1="\n"
      fi
    fi
    PS1+="\[$(tput setaf 1)\]┏━"
  }

  source out/ble.sh --norc
  getCPos() {
    if [[ ! ${_ble_attached-} ]]; then
      #if ! ble 2>/dev/null; then
      local v=() t=$(stty -g)
      stty -echo
      printf "\033[6n"
      IFS='[;' read -ra v -d R
      stty $t
      CPos=(${v[@]:1})
    fi
  }
  PROMPT_COMMAND=getCPos
fi

#------------------------------------------------------------------------------
# 修正案2

if [[ $type == fix2 ]]; then
  source out/ble.sh --norc
  custom_prompt() {
    printf -v PS1 $'\[ \b\e[%dC %s\r\]' $((COLUMNS-2)) "$(tput xenl && echo ' ')"
    PS1+='hello\$ '
  }
  PROMPT_COMMAND=custom_prompt
fi

if [[ $type == fix3 ]]; then
  source out/ble.sh --norc

  getCPos() {
    local v=() t=$(stty -g)
    stty -echo
    printf "\033[6n"
    IFS='[;' read -ra v -d R
    stty $t
    CPos=(${v[@]:1})
  }

  if [[ ${BLE_VERSION-} ]]; then
    ble/function#advice after ble/widget/clear-screen '_ble_edit_lineno=0'
    _check_clear_command() {
      local rex_eval_prefix='((eval|command|env|sudo)[[:space:]]+)?'
      local rex_clear_command='(tput[[:space:]]+)?(clear|reset)'
      local rex=$'(^|[\n;&|(])[[:space:]]*'$rex_eval_prefix$rex_clear_command'([ \t\n;&|)]|$)'
      [[ $BASH_COMMAND =~ $rex ]] && _ble_edit_lineno=0
    }
    blehook POSTEXEC+=_check_clear_command
  fi

  custom_prompt() {
    if
      if [[ $_ble_attached ]]; then
        ((_ble_edit_lineno==0))
      else
        getCPos; [ $CPos -eq 1 ]
      fi
    then
      PS1=""
    else
      PS1="\n"
    fi
    PS1+='hello\$ '
  }
  PROMPT_COMMAND=custom_prompt
fi

if [[ $type == fix3b ]]; then
  source out/ble.sh --norc

  getCPos() {
    local v=() t=$(stty -g)
    stty -echo
    printf "\033[6n"
    IFS='[;' read -ra v -d R
    stty $t
    CPos=(${v[@]:1})
  }

  if [[ ${BLE_VERSION-} ]]; then
    CPos=(1 1)
    blehook POSTEXEC+=getCPos
  fi

  custom_prompt() {
    if [[ ! ${_ble_attached-} ]]; then
      getCPos
    fi
    if [ $CPos -eq 1 ]; then
      PS1=""
    else
      PS1="\n"
    fi
    PS1+='hello\$ '
  }
  PROMPT_COMMAND=custom_prompt
fi

#------------------------------------------------------------------------------
# minimal reproducer for absorbed characters

if [[ $type == rep-absorb-chars ]]; then
  getCPos() {
    local v=() t=$(stty -g)
    stty -echo
    printf "\033[6n"
    IFS='[;' read -ra v -d R
    stty $t
    CPos=(${v[@]:1})
  }
  #PROMPT_COMMAND=getCPos

  something_slow() { sleep 2; }
  something_slow
fi