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Revisions

  1. @jacksluong jacksluong revised this gist Dec 23, 2023. 2 changed files with 1 addition and 1 deletion.
    2 changes: 1 addition & 1 deletion cdp.md
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    # cdp: Change Directory Pro
    ![recording](https://gist.github.com/jacksluong/744ee3e30f6fc05a5563353e6db28aca/raw/3d79923e200ab5b133730cf2d9f82efbadbd4631/recording.gif)
    ![recording](https://gist.github.com/assets/27376487/0819e597-43e7-4742-afb9-5eab9cd19f74)
    How do you navigate in your terminal? Do you chain sequences of `cd` commands together, or copy a file path and paste it? Sometimes to a destination directory that's not adjacent to your current one?

    `cdp` might be the solution for you. It's a command that activates an interactive way to navigate directories smoothly and easily. Compatible with bash and zsh.
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  2. @jacksluong jacksluong revised this gist Dec 23, 2023. 1 changed file with 1 addition and 1 deletion.
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    # cdp: Change Directory Pro
    (recording)[recording.gif]
    ![recording](https://gist.github.com/jacksluong/744ee3e30f6fc05a5563353e6db28aca/raw/3d79923e200ab5b133730cf2d9f82efbadbd4631/recording.gif)
    How do you navigate in your terminal? Do you chain sequences of `cd` commands together, or copy a file path and paste it? Sometimes to a destination directory that's not adjacent to your current one?

    `cdp` might be the solution for you. It's a command that activates an interactive way to navigate directories smoothly and easily. Compatible with bash and zsh.
  3. @jacksluong jacksluong revised this gist Dec 23, 2023. 3 changed files with 1 addition and 0 deletions.
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    # cdp: Change Directory Pro
    (recording)[recording.gif]
    How do you navigate in your terminal? Do you chain sequences of `cd` commands together, or copy a file path and paste it? Sometimes to a destination directory that's not adjacent to your current one?

    `cdp` might be the solution for you. It's a command that activates an interactive way to navigate directories smoothly and easily. Compatible with bash and zsh.
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  4. @jacksluong jacksluong revised this gist Dec 23, 2023. 3 changed files with 257 additions and 112 deletions.
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    20 changes: 9 additions & 11 deletions cdp.md
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    # cdp: Change Directory Pro
    ![recording](https://user-images.githubusercontent.com/27376487/188341254-75583362-0614-4475-a6dd-309b2592d1ea.gif)

    How do you navigate in your terminal? Do you chain sequences of `cd` commands together, or copy a file path and paste it? Sometimes to a destination directory that's not adjacent to your current one?

    `cdp` might be the solution for you. It's a command that activates an interactive way to navigate directories smoothly and easily.
    `cdp` might be the solution for you. It's a command that activates an interactive way to navigate directories smoothly and easily. Compatible with bash and zsh.

    ## Controls
    - `cdp` to activate
    - ↑/↓ to change the selected subdirectory
    - ← to move into the parent subdirectory (disallowed when in $HOME)
    - → to make the selected subdirectory the active one (i.e. `cd` into it)
    - ↵ (return) to exit navigation in the new active directory
    - ⎵ (space) to make $HOME the active directory
    - [0-9] to make active the subdirectory is listed next to that number
    - Ctrl+C to cancel navigation, staying in the initial directory
    - Any characters (except backslash) to search for a specific substring

    ## Installation
    Just copy the code below into your .zshrc! (Alternatively, place it in a different file and source that file in .zshrc to keep it from getting bloated.)

    Note 1: Only works for Zsh (not Bash).

    Note 2: If the formatting of the code below looks ugly for whatever reason, reload the page.
    Download `cdp.sh` and place it wherever you want. You can source this file in your `.{zsh|bash}rc`, or you can directly copy the contents in. The following commands can help with that (replace `.zshrc` with `.bashrc` as appropriate):

    ###### Based on https://unix.stackexchange.com/questions/146570/arrow-key-enter-menu
    ```zsh
    # source file from .zshrc
    echo "source <path-to-file>" >> ~/.zshrc
    # copy into .zshrc
    tail -n +3 <path-to-file> >> ~/.zshrc
    ```
    349 changes: 248 additions & 101 deletions cdp.sh
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    #!/bin/bash

    # `cdp` to activate an interactive way to navigate directories
    function cdp {
    # helpers for terminal print control, key input, and other things
    ESC=$( printf "\033" )
    cursor_blink_on() { printf "${ESC}[?25h"; }
    cursor_blink_off() { printf "${ESC}[?25l"; }
    cursor_to() { printf "${ESC}[$1;${2:-1}H"; }
    print_option() { printf " $1 $(tput el)"; }
    print_selected() { printf "${ESC}[7m $1 ${ESC}[27m$(tput el)"; }
    get_cursor_row() { IFS=';' read -sdR $'?\E[6n' ROW COL; echo ${ROW#*\[}; }

    key_input() { read -sk1 'key?'
    case $key in
    $'\n') echo enter;;
    ' ') echo space;;
    0) echo 10;;
    1|2|3|4|5|6|7|8|9) echo $key;;
    "${ESC}")
    read -sk2 key
    if [[ $key = "[A" ]]; then echo up
    elif [[ $key = "[B" ]]; then echo down
    elif [[ $key = "[C" ]]; then echo right
    elif [[ $key = "[D" ]]; then echo left
    fi;;
    esac }
    min() { printf "%s\n" "$@" | sort -g | head -n1 }
    max() { printf "%s\n" "$@" | sort -gr | head -n1 }


    # initialize persistent variables
    MAX_SIZE=10
    local prev_dir=''
    local orig_dir=$PWD

    while true; do
    # determine the options
    local subdirs=$((ls -1d */) 2> /dev/null)
    local opts=("$(tput smul)Change directory to $(tput bold)$(pwd)$(tput sgr0)$(tput el)")
    [[ ! -z $subdirs ]] && opts+=("${(f)subdirs}")
    opts+=('../')
    local num_opts=${#opts[@]}
    # initialize interaction area and screen positions of first and last row (used for overwriting)
    # note: indices are all 1-indexed with row 1 being the line displaying the working directory
    local num_opt_rows=$(min $(tput lines) $MAX_SIZE $((num_opts - 1)))
    for _ in {1..$num_opt_rows}; do echo; done
    local last_row=$(get_cursor_row)
    local first_row=$((last_row - num_opt_rows))
    cursor_to $first_row
    echo " $opts[1]"

    # ensure cursor and input echoing back on upon a ctrl+c during read
    trap "cd $orig_dir; cursor_blink_on; stty echo; printf '\n'; return" 2
    cursor_blink_off

    # jump to previous dir option (if left arrow key was pressed)
    local selected=2
    for i in {2..$#opts}; do [[ $opts[$i] = $prev_dir ]] && selected=$i; done
    local inp=''

    local top_row=$(max $((selected - num_opt_rows + 2)) 2)
    while true; do
    # determine "scroll" position
    if [[ $selected -lt $top_row ]]; then top_row=$selected
    elif [[ $selected -ge $((top_row + num_opt_rows)) ]]; then top_row=$((selected - num_opt_rows + 1)); fi

    # print options by overwriting the last lines
    for opt_index in {$top_row..$((top_row + num_opt_rows - 1))}; do
    cursor_to $((first_row + opt_index - top_row + 1))
    printf " [%i] " $(((opt_index - top_row + 1) % 10))
    if [[ $opt_index -eq $selected ]]; then print_selected $opts[$((opt_index))]
    else print_option $opts[$((opt_index))]; fi
    done

    # user key control
    inp=$(key_input)
    case $inp in
    left) [[ $PWD != $HOME ]] && break;;
    up) ((selected--)); [[ $selected -lt 2 ]] && selected=$num_opts;;
    down) ((selected++)); [[ $selected -gt $num_opts ]] && selected=2;;
    right|enter|space|1|2|3|4|5|6|7|8|9|10) break;;
    esac
    done

    # reset interaction area
    cursor_to $first_row
    for row_offset in {1..$num_opt_rows}; do cursor_to $((first_row + row_offset)); echo -n $(tput el); done
    cursor_to $first_row

    # cd accordingly
    case $inp in
    right) cd $opts[$selected]; prev_dir='';;
    enter) break;;
    space) cd; prev_dir='';;
    left) prev_dir=$(printf '%s/' "${PWD##*/}"); cd ..;;
    *) local dest=$opts[$((top_row + inp - 1))]
    [[ $dest == '../' ]] && prev_dir=$(printf '%s/' "${PWD##*/}")
    cd $dest;;
    esac
    done
    cursor_blink_on
    }
    # note: for consistency, treat all arrays as 0-indexed
    cdp() {
    local MAX_VOPTS=8 MAX_DIR_WIDTH=60 SEARCH_ICON="⌕"
    local SEARCH_PREFIX=" $(tput bold)${SEARCH_ICON}$(tput sgr0)$(tput el) "

    local is_bash=$([[ -n $BASH ]] && echo true || echo false)
    local is_zsh=$([[ -n $ZSH_NAME ]] && echo true || echo false)

    # helper functions
    translate_input() {
    # args: input
    case $1 in
    $'\n'|'') echo enter;;
    $'\177'|$'\b') echo backspace;;
    "[A") echo up;;
    "[B") echo down;;
    "[C") echo right;;
    "[D") echo left;;
    *) echo "$1";;
    esac
    }
    zsh_key_input() {
    read -sk1 key
    [[ $key = $'\e' ]] && read -sk2 -t 0.1 key
    translate_input "$key"
    }
    bash_key_input() {
    IFS='' read -rsn1 key
    [[ $key = $'\e' ]] && read -rsn2 -t 1 key
    translate_input "$key"
    }

    index_array() {
    # args: index, array
    local i=$1
    shift 1
    echo "${@:$((i+1)):1}" # only way for array indexing to work for both bash and zsh
    # ${@:0:1} will return the function name
    }
    index_of() {
    # args: element, array
    local e=$1
    shift 1

    local i=0
    for s in "$@"; do
    if [[ $s = "$e" ]]; then
    echo $i
    return
    fi
    ((i++))
    done
    echo -1
    }

    cursor_to_first_option() {
    tput rc; tput cud1; tput cud1
    }
    print_option() {
    echo " $1 $(tput el)"
    }
    print_selected() {
    echo " $(tput setab 7)$(tput setaf 0) $1 $(tput sgr0)$(tput el)"
    }

    render_options() {
    # precondition: cursor is at the first line of the options
    # args: selected index (of visible options), all visible options (as array)
    local selected=$1
    shift 1
    local options=("$@")

    local i=0
    for s in "${options[@]}"; do
    if [[ $i -eq $selected ]]; then print_selected "$s"; else print_option "$s"; fi
    ((i++))
    done
    }

    render_search_string() {
    # args: search string
    # postcondition: cursor is at the first line of the options
    tput rc; tput cud1; tput cuf 4
    echo "$(tput setaf 3)${search_str}$(tput el)$(tput sgr0)_"
    }

    render_heading() {
    # args: none
    tput rc
    local pwd_str=$(pwd)
    local lim_width=$(($(tput cols) - 20 - 5)) # 20 for "Change directory to ", 5 for buffer
    [[ lim_width -gt MAX_DIR_WIDTH ]] && lim_width=$MAX_DIR_WIDTH
    [[ ${#pwd_str} -gt $lim_width ]] && pwd_str="...${pwd_str:$((${#pwd_str} - lim_width + 3))}"
    echo "$(tput smul)Change directory to $(tput bold)${pwd_str}$(tput sgr0)$(tput el)"
    }

    # initialize variables
    local search_str='' prev_dir='' orig_dir=$PWD
    local num_vopts=$(($(tput lines) - 2 - 1)) # 2 fixed lines, 1 for buffer
    [[ $num_vopts -gt $MAX_VOPTS ]] && num_vopts=$MAX_VOPTS

    local regex_chars='$^.?+*(){}[]/'
    escape_regex() {
    # args: string
    local str=$1 c=''
    for ((i=0; i<${#regex_chars}; i++)); do
    c=${regex_chars:$i:1}
    str=${str//"$c"/\\$c}
    done
    echo "$str"
    }

    # initialize interface
    tput civis
    stty -echo
    tpuc sc && render_heading
    echo -e "$SEARCH_PREFIX"
    for ((i=0; i<num_vopts; i++)); do echo; done
    tput cuu $((num_vopts + 2))
    tput sc

    # expected output:
    # - directory line (fixed line)
    # - search string line (fixed line)
    # - options (opts, each on their own line)
    # - blank lines to fill up the rest of the screen as needed

    # cleanup functions
    cleanup_base() {
    tput rc
    tput ed
    tput cnorm
    stty echo
    trap - INT
    }

    cleanup_exit() {
    cleanup_base
    echo "Working directory changed: $(tput bold)$(pwd)$(tput el)$(tput sgr0)"
    }

    cleanup_interrupt() {
    cleanup_base
    cd $orig_dir
    echo "Restored working directory: $(tput bold)$(pwd)$(tput el)$(tput sgr0)"
    return
    }

    trap 'cleanup_interrupt; return' INT

    # main loop
    # opts: options, fopts: filtered options, vopts: visible options
    while true; do
    # determine the options
    local fopts=() opts=()
    local subdirs=$( (ls -F | grep /$ | sort -f) )
    if [[ -n $subdirs ]]; then
    [[ $is_bash = true ]] && IFS=$'\n' read -r -d '' -a opts <<< "$subdirs"
    [[ $is_zsh = true ]] && opts+=("${(f)subdirs}")
    fi
    opts+=('../')

    # jump to previous dir option (if left arrow key was pressed)
    local sel=0
    local prev_dir_index=$(index_of "$prev_dir" "${opts[@]}")
    [[ $prev_dir_index -ne -1 ]] && sel=$prev_dir_index;
    local inp=''

    local first_vopt=$((sel - num_vopts + 1))
    [[ $first_vopt -lt 0 ]] && first_vopt=0
    local do_rerender_opts=true did_update_search=true

    render_heading

    # loop while still in the same directory
    while true; do
    if [[ $did_update_search = true ]]; then
    render_search_string "$search_str"
    # filter options by search string
    fopts=()
    if [[ -z $search_str ]]; then
    fopts=("${opts[@]}")
    else
    for opt in "${opts[@]}"; do
    local opt_l="" regex=""
    if [[ $is_bash = true ]]; then
    opt_l=$(echo "$opt" | tr '[:upper:]' '[:lower:]')
    regex=$(echo "$search_str" | tr '[:upper:]' '[:lower:]')
    else
    opt_l=${opt:l}
    regex=${search_str:l}
    fi
    regex=$(escape_regex "$regex")
    [[ "$opt_l" =~ $regex ]] && fopts+=("$opt")
    done
    fi
    [[ "${#fopts[@]}" -eq 0 ]] && fopts+=('../')
    local num_fopts=${#fopts[@]}
    else
    cursor_to_first_option
    fi
    did_update_search=false

    if [[ $do_rerender_opts = true ]]; then
    # determine "scroll" position
    if [[ $sel -lt $first_vopt ]]; then first_vopt=$sel
    elif [[ $sel -ge $((first_vopt + num_vopts)) ]]; then first_vopt=$((sel - num_vopts + 1)); fi

    # print options
    vopts=( "${fopts[@]:$first_vopt:$num_vopts}" )
    render_options $((sel - first_vopt)) "${vopts[@]}"
    tput ed
    fi
    do_rerender_opts=true

    # user key control
    [[ $is_bash = true ]] && inp=$(bash_key_input) || inp=$(zsh_key_input)
    case $inp in
    left) [[ $PWD != "$HOME" ]] && break;;
    up) ((sel--)); [[ $sel -lt 0 ]] && sel=$((num_fopts - 1));;
    down) ((sel++)); [[ $sel -ge $num_fopts ]] && sel=0;;
    right|enter) break;;
    '\') do_rerender_opts=false;;
    backspace)
    search_str="${search_str%?}"
    sel=0
    did_update_search=true;;
    *)
    search_str+=$inp
    sel=0
    did_update_search=true;;
    esac
    done

    # cd accordingly
    case $inp in
    right) cd "$(index_array "$sel" "${fopts[@]}")"; prev_dir='';;
    left) prev_dir=$(printf '%s/' "${PWD##*/}"); cd ..;;
    enter) break;;
    esac

    search_str=''
    done

    cleanup_exit
    }
  5. @jacksluong jacksluong revised this gist Oct 6, 2023. 1 changed file with 2 additions and 1 deletion.
    3 changes: 2 additions & 1 deletion cdp.md
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    Original file line number Diff line number Diff line change
    @@ -16,9 +16,10 @@ How do you navigate in your terminal? Do you chain sequences of `cd` commands to
    - Ctrl+C to cancel navigation, staying in the initial directory

    ## Installation
    Just copy the code below into your .zshrc! (Alternatively, place it in a different file and source that file in .zshrc to keep those files from getting bloated.)
    Just copy the code below into your .zshrc! (Alternatively, place it in a different file and source that file in .zshrc to keep it from getting bloated.)

    Note 1: Only works for Zsh (not Bash).

    Note 2: If the formatting of the code below looks ugly for whatever reason, reload the page.

    ###### Based on https://unix.stackexchange.com/questions/146570/arrow-key-enter-menu
  6. @jacksluong jacksluong revised this gist Dec 27, 2022. 1 changed file with 1 addition and 1 deletion.
    2 changes: 1 addition & 1 deletion cdp.md
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    Original file line number Diff line number Diff line change
    @@ -18,7 +18,7 @@ How do you navigate in your terminal? Do you chain sequences of `cd` commands to
    ## Installation
    Just copy the code below into your .zshrc! (Alternatively, place it in a different file and source that file in .zshrc to keep those files from getting bloated.)

    Note 1: Not yet tested for Bash or PowerShell.
    Note 1: Only works for Zsh (not Bash).
    Note 2: If the formatting of the code below looks ugly for whatever reason, reload the page.

    ###### Based on https://unix.stackexchange.com/questions/146570/arrow-key-enter-menu
  7. @jacksluong jacksluong revised this gist Sep 7, 2022. 1 changed file with 2 additions and 1 deletion.
    3 changes: 2 additions & 1 deletion cdp.md
    View file
    Original file line number Diff line number Diff line change
    @@ -18,6 +18,7 @@ How do you navigate in your terminal? Do you chain sequences of `cd` commands to
    ## Installation
    Just copy the code below into your .zshrc! (Alternatively, place it in a different file and source that file in .zshrc to keep those files from getting bloated.)

    Not yet tested for Bash or PowerShell.
    Note 1: Not yet tested for Bash or PowerShell.
    Note 2: If the formatting of the code below looks ugly for whatever reason, reload the page.

    ###### Based on https://unix.stackexchange.com/questions/146570/arrow-key-enter-menu
  8. @jacksluong jacksluong revised this gist Sep 5, 2022. 1 changed file with 3 additions and 1 deletion.
    4 changes: 3 additions & 1 deletion cdp.md
    View file
    Original file line number Diff line number Diff line change
    @@ -16,6 +16,8 @@ How do you navigate in your terminal? Do you chain sequences of `cd` commands to
    - Ctrl+C to cancel navigation, staying in the initial directory

    ## Installation
    Just copy the code below into your .zshrc (Zsh) or .profile (Bash)! (Alternatively, place it in a different file and source that file in .zshrc/.profile to keep those files from getting bloated.)
    Just copy the code below into your .zshrc! (Alternatively, place it in a different file and source that file in .zshrc to keep those files from getting bloated.)

    Not yet tested for Bash or PowerShell.

    ###### Based on https://unix.stackexchange.com/questions/146570/arrow-key-enter-menu
  9. @jacksluong jacksluong revised this gist Sep 5, 2022. 2 changed files with 1 addition and 4 deletions.
    2 changes: 1 addition & 1 deletion cdp.md
    View file
    Original file line number Diff line number Diff line change
    @@ -16,6 +16,6 @@ How do you navigate in your terminal? Do you chain sequences of `cd` commands to
    - Ctrl+C to cancel navigation, staying in the initial directory

    ## Installation
    Just copy the code below into your .zshrc (Zsh) or .profile (Bash)!
    Just copy the code below into your .zshrc (Zsh) or .profile (Bash)! (Alternatively, place it in a different file and source that file in .zshrc/.profile to keep those files from getting bloated.)

    ###### Based on https://unix.stackexchange.com/questions/146570/arrow-key-enter-menu
    3 changes: 0 additions & 3 deletions cdp.sh
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    @@ -1,8 +1,5 @@
    # `cdp` to activate an interactive way to navigate directories
    function cdp {
    # derived from: https://unix.stackexchange.com/a/415155 (converted to zsh)
    # tput usage: https://stackoverflow.com/questions/5947742/how-to-change-the-output-color-of-echo-in-linux/20983251#20983251

    # helpers for terminal print control, key input, and other things
    ESC=$( printf "\033" )
    cursor_blink_on() { printf "${ESC}[?25h"; }
  10. @jacksluong jacksluong revised this gist Sep 5, 2022. 1 changed file with 1 addition and 1 deletion.
    2 changes: 1 addition & 1 deletion cdp.md
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    Original file line number Diff line number Diff line change
    @@ -1,5 +1,5 @@
    # cdp: Change Directory Pro
    ![recording](https://user-images.githubusercontent.com/27376487/188336663-8879a54d-4816-4b0c-b887-9c6f256dfa9e.gif)
    ![recording](https://user-images.githubusercontent.com/27376487/188341254-75583362-0614-4475-a6dd-309b2592d1ea.gif)

    How do you navigate in your terminal? Do you chain sequences of `cd` commands together, or copy a file path and paste it? Sometimes to a destination directory that's not adjacent to your current one?

  11. @jacksluong jacksluong revised this gist Sep 5, 2022. 1 changed file with 3 additions and 5 deletions.
    8 changes: 3 additions & 5 deletions cdp.md
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    Original file line number Diff line number Diff line change
    @@ -1,4 +1,6 @@
    # cdp: Change Directory Pro
    ![recording](https://user-images.githubusercontent.com/27376487/188336663-8879a54d-4816-4b0c-b887-9c6f256dfa9e.gif)

    How do you navigate in your terminal? Do you chain sequences of `cd` commands together, or copy a file path and paste it? Sometimes to a destination directory that's not adjacent to your current one?

    `cdp` might be the solution for you. It's a command that activates an interactive way to navigate directories smoothly and easily.
    @@ -16,8 +18,4 @@ How do you navigate in your terminal? Do you chain sequences of `cd` commands to
    ## Installation
    Just copy the code below into your .zshrc (Zsh) or .profile (Bash)!

    ## Demo
    ![recording](https://user-images.githubusercontent.com/27376487/188336663-8879a54d-4816-4b0c-b887-9c6f256dfa9e.gif)

    ###### Based on https://unix.stackexchange.com/questions/146570/arrow-key-enter-menu
    Just copy the code below into your .zshrc (Zsh) or .profile (Bash)!
    ###### Based on https://unix.stackexchange.com/questions/146570/arrow-key-enter-menu
  12. @jacksluong jacksluong created this gist Sep 5, 2022.
    23 changes: 23 additions & 0 deletions cdp.md
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    @@ -0,0 +1,23 @@
    # cdp: Change Directory Pro
    How do you navigate in your terminal? Do you chain sequences of `cd` commands together, or copy a file path and paste it? Sometimes to a destination directory that's not adjacent to your current one?

    `cdp` might be the solution for you. It's a command that activates an interactive way to navigate directories smoothly and easily.

    ## Controls
    - `cdp` to activate
    - ↑/↓ to change the selected subdirectory
    - ← to move into the parent subdirectory (disallowed when in $HOME)
    - → to make the selected subdirectory the active one (i.e. `cd` into it)
    - ↵ (return) to exit navigation in the new active directory
    - ⎵ (space) to make $HOME the active directory
    - [0-9] to make active the subdirectory is listed next to that number
    - Ctrl+C to cancel navigation, staying in the initial directory

    ## Installation
    Just copy the code below into your .zshrc (Zsh) or .profile (Bash)!

    ## Demo
    ![recording](https://user-images.githubusercontent.com/27376487/188336663-8879a54d-4816-4b0c-b887-9c6f256dfa9e.gif)

    ###### Based on https://unix.stackexchange.com/questions/146570/arrow-key-enter-menu
    Just copy the code below into your .zshrc (Zsh) or .profile (Bash)!
    105 changes: 105 additions & 0 deletions cdp.sh
    View file
    Original file line number Diff line number Diff line change
    @@ -0,0 +1,105 @@
    # `cdp` to activate an interactive way to navigate directories
    function cdp {
    # derived from: https://unix.stackexchange.com/a/415155 (converted to zsh)
    # tput usage: https://stackoverflow.com/questions/5947742/how-to-change-the-output-color-of-echo-in-linux/20983251#20983251

    # helpers for terminal print control, key input, and other things
    ESC=$( printf "\033" )
    cursor_blink_on() { printf "${ESC}[?25h"; }
    cursor_blink_off() { printf "${ESC}[?25l"; }
    cursor_to() { printf "${ESC}[$1;${2:-1}H"; }
    print_option() { printf " $1 $(tput el)"; }
    print_selected() { printf "${ESC}[7m $1 ${ESC}[27m$(tput el)"; }
    get_cursor_row() { IFS=';' read -sdR $'?\E[6n' ROW COL; echo ${ROW#*\[}; }

    key_input() { read -sk1 'key?'
    case $key in
    $'\n') echo enter;;
    ' ') echo space;;
    0) echo 10;;
    1|2|3|4|5|6|7|8|9) echo $key;;
    "${ESC}")
    read -sk2 key
    if [[ $key = "[A" ]]; then echo up
    elif [[ $key = "[B" ]]; then echo down
    elif [[ $key = "[C" ]]; then echo right
    elif [[ $key = "[D" ]]; then echo left
    fi;;
    esac }
    min() { printf "%s\n" "$@" | sort -g | head -n1 }
    max() { printf "%s\n" "$@" | sort -gr | head -n1 }


    # initialize persistent variables
    MAX_SIZE=10
    local prev_dir=''
    local orig_dir=$PWD

    while true; do
    # determine the options
    local subdirs=$((ls -1d */) 2> /dev/null)
    local opts=("$(tput smul)Change directory to $(tput bold)$(pwd)$(tput sgr0)$(tput el)")
    [[ ! -z $subdirs ]] && opts+=("${(f)subdirs}")
    opts+=('../')
    local num_opts=${#opts[@]}
    # initialize interaction area and screen positions of first and last row (used for overwriting)
    # note: indices are all 1-indexed with row 1 being the line displaying the working directory
    local num_opt_rows=$(min $(tput lines) $MAX_SIZE $((num_opts - 1)))
    for _ in {1..$num_opt_rows}; do echo; done
    local last_row=$(get_cursor_row)
    local first_row=$((last_row - num_opt_rows))
    cursor_to $first_row
    echo " $opts[1]"

    # ensure cursor and input echoing back on upon a ctrl+c during read
    trap "cd $orig_dir; cursor_blink_on; stty echo; printf '\n'; return" 2
    cursor_blink_off

    # jump to previous dir option (if left arrow key was pressed)
    local selected=2
    for i in {2..$#opts}; do [[ $opts[$i] = $prev_dir ]] && selected=$i; done
    local inp=''

    local top_row=$(max $((selected - num_opt_rows + 2)) 2)
    while true; do
    # determine "scroll" position
    if [[ $selected -lt $top_row ]]; then top_row=$selected
    elif [[ $selected -ge $((top_row + num_opt_rows)) ]]; then top_row=$((selected - num_opt_rows + 1)); fi

    # print options by overwriting the last lines
    for opt_index in {$top_row..$((top_row + num_opt_rows - 1))}; do
    cursor_to $((first_row + opt_index - top_row + 1))
    printf " [%i] " $(((opt_index - top_row + 1) % 10))
    if [[ $opt_index -eq $selected ]]; then print_selected $opts[$((opt_index))]
    else print_option $opts[$((opt_index))]; fi
    done

    # user key control
    inp=$(key_input)
    case $inp in
    left) [[ $PWD != $HOME ]] && break;;
    up) ((selected--)); [[ $selected -lt 2 ]] && selected=$num_opts;;
    down) ((selected++)); [[ $selected -gt $num_opts ]] && selected=2;;
    right|enter|space|1|2|3|4|5|6|7|8|9|10) break;;
    esac
    done

    # reset interaction area
    cursor_to $first_row
    for row_offset in {1..$num_opt_rows}; do cursor_to $((first_row + row_offset)); echo -n $(tput el); done
    cursor_to $first_row

    # cd accordingly
    case $inp in
    right) cd $opts[$selected]; prev_dir='';;
    enter) break;;
    space) cd; prev_dir='';;
    left) prev_dir=$(printf '%s/' "${PWD##*/}"); cd ..;;
    *) local dest=$opts[$((top_row + inp - 1))]
    [[ $dest == '../' ]] && prev_dir=$(printf '%s/' "${PWD##*/}")
    cd $dest;;
    esac
    done
    cursor_blink_on
    }