#!/bin/sh
# POLYWINS

# SETTINGS {{{ ---

active_text_color="#e74c5c"
active_bg= 
active_underline=

inactive_text_color="#6bb05d"
inactive_bg= "#e74c4c"
inactive_underline= 

separator="•"
separator_text_color="#303435"
show="icon" # options: window_title, window_class, window_classname, icon
forbidden_classes="Polybar Conky Gmrun"
empty_desktop_message=
char_limit=20
max_windows=15
char_case="normal" # normal, upper, lower
add_spaces="true"
resize_increment=16
wm_border_width=1 # setting this might be required for accurate resize position

# --- }}}

main() {
  # If no argument passed...
  if [ -z "$2" ]; then
    # ...print new window list every time
    # the active window changes or
    # a window is opened or closed
    xprop -root -spy _NET_CLIENT_LIST _NET_ACTIVE_WINDOW |
      while IFS= read -r _; do
        generate_window_list
      done

  # If arguments are passed, run requested on-click function
  else
    "$@"
  fi
}

# ON-CLICK FUNCTIONS {{{ ---

raise_or_minimize() {
  if [ "$(get_active_wid)" = "$1" ]; then
    bspc node $1 -g hidden=on
    #wmctrl -ir "$1" -b toggle,hidden
  else
    bspc node $1 -g hidden=off -f
    #wmctrl -ia "$1"
  fi
}

close() {
  wmctrl -ic "$1"
}

slop_resize() {
  wmctrl -ia "$1"
  wmctrl -ir "$1" -e "$(slop -f 0,%x,%y,%w,%h)"
}

increment_size() {
  while IFS="[ .]" read -r wid ws wx wy ww wh _; do
    test "$wid" != "$1" && continue
    x=$((wx - wm_border_width * 2 - resize_increment / 2))
    y=$((wy - wm_border_width * 2 - resize_increment / 2))
    w=$((ww + resize_increment))
    h=$((wh + resize_increment))
  done <<-EOF
	$(wmctrl -lG)
	EOF

  wmctrl -ir "$1" -e "0,$x,$y,$w,$h"
}

decrement_size() {
  while IFS="[ .]" read -r wid ws wx wy ww wh _; do
    test "$wid" != "$1" && continue
    x=$((wx - wm_border_width * 2 + resize_increment / 2))
    y=$((wy - wm_border_width * 2 + resize_increment / 2))
    w=$((ww - resize_increment))
    h=$((wh - resize_increment))
  done <<-EOF
	$(wmctrl -lG)
	EOF

  wmctrl -ir "$1" -e "0,$x,$y,$w,$h"
}

# --- }}}

# WINDOW LIST SETUP {{{ ---

active_left="%{F$active_text_color}"
active_right="%{F-}"
inactive_left="%{F$inactive_text_color}"
inactive_right="%{F-}"
separator="%{F$inactive_text_color}$separator%{F-}"

if [ -n "$active_underline" ]; then
  active_left="${active_left}%{+u}%{u$active_underline}"
  active_right="%{-u}${active_right}"
fi

if [ -n "$active_bg" ]; then
  active_left="${active_left}%{B$active_bg}"
  active_right="%{B-}${active_right}"
fi

if [ -n "$inactive_underline" ]; then
  inactive_left="${inactive_left}%{+u}%{u$inactive_underline}"
  inactive_right="%{-u}${inactive_right}"
fi

if [ -n "$inactive_bg" ]; then
  inactive_left="${inactive_left}%{B$inactive_bg}"
  inactive_right="%{B-}${inactive_right}"
fi

get_active_wid() {
  active_wid=$(xprop -root _NET_ACTIVE_WINDOW)
  active_wid="${active_wid#*\# }"
  active_wid="${active_wid%,*}" # Necessary for XFCE
  while [ ${#active_wid} -lt 10 ]; do
    active_wid="0x0${active_wid#*x}"
  done
  echo "$active_wid"
}

get_active_workspace() {
  wmctrl -d |
    while IFS="[ .]" read -r number active_status _; do
      test "$active_status" = "*" && echo "$number" && break
    done
}

generate_window_list() {
  active_workspace=$(get_active_workspace)
  active_wid=$(get_active_wid)
  window_count=0
  on_click="$0"

  # Format each window name one by one
  # Space and . are both used as IFS,
  # because classname and class are separated by '.'
  while IFS="[ .\.]" read -r wid ws cname cls host title; do
    # Don't show the window if on another workspace (-1 = sticky)
    if [ "$ws" != "$active_workspace" ] && [ "$ws" != "-1" ]; then
      continue
    fi

    # Don't show the window if its class is forbidden
    case "$forbidden_classes" in
    *$cls*) continue ;;
    esac

    # If max number of windows reached, just increment
    # the windows counter
    if [ "$window_count" -ge "$max_windows" ]; then
      window_count=$((window_count + 1))
      continue
    fi

    # Show the user-selected window property
    case "$show" in
    "window_class") w_name="$cls" ;;
    "window_classname") w_name="$cname" ;;
    "window_title") w_name="$title" ;;
    "icon")
      case "$cls" in
      Alacritty) w_name='>.<' ;;
      Chromium) w_name='' ;;
      Firefox) w_name='' ;;
      TelegramDesktop) w_name=' ' ;;
      Pcmanfm) w_name='' ;;
      obs-studio) w_name='' ;;
      Spotify) w_name='󰓇 ';; 
      *) w_name="$cls" ;;
      esac
      ;;
    esac

    if [ "$show" != "icon" ]; then
      # Use user-selected character case
      case "$char_case" in
      "lower") w_name=$(
        echo "$w_name" | tr '[:upper:]' '[:lower:]'
      ) ;;
      "upper") w_name=$(
        echo "$w_name" | tr '[:lower:]' '[:upper:]'
      ) ;;
      esac

      # Truncate displayed name to user-selected limit
      if [ "${#w_name}" -gt "$char_limit" ]; then
        w_name="$(echo "$w_name" | cut -c1-$((char_limit - 1)))…"
      fi
    fi

    # Apply add-spaces setting
    if [ "$add_spaces" = "true" ]; then
      w_name=" $w_name "
    fi

    # Add left and right formatting to displayed name
    if [ "$wid" = "$active_wid" ]; then
      w_name="${active_left}${w_name}${active_right}"
    else
      w_name="${inactive_left}${w_name}${inactive_right}"
    fi

    # Add separator unless the window is first in list
    if [ "$window_count" != 0 ]; then
      printf "%s" "$separator"
    fi

    # Add on-click action Polybar formatting
    printf "%s" "%{A1:$on_click raise_or_minimize $wid:}"
    printf "%s" "%{A2:$on_click close $wid:}"
    printf "%s" "%{A3:$on_click slop_resize $wid:}"
    printf "%s" "%{A4:$on_click increment_size $wid:}"
    printf "%s" "%{A5:$on_click decrement_size $wid:}"
    # Print the final window name
    printf "%s" "$w_name"
    printf "%s" "%{A}%{A}%{A}%{A}%{A}"

    window_count=$((window_count + 1))
  done <<-EOF
	$(wmctrl -lx)
	EOF

  # After printing all the windows,
  # print number of hidden windows
  if [ "$window_count" -gt "$max_windows" ]; then
    printf "%s" "+$((window_count - max_windows))"
  fi

  # Print empty desktop message if no windows are open
  if [ "$window_count" = 0 ]; then
    printf "%s" "$empty_desktop_message"
  fi

  # Print newline
  echo ""
}

# --- }}}

main "$@"