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# -*- python -*-
'''
xpybar – xmobar replacement written in python
Copyright © 2014, 2015, 2016, 2017, 2018, 2019  Mattias Andrée (m@maandreese)

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program.  If not, see <http://www.gnu.org/licenses/>.
'''

# This is a template configuration of a panel that can display almost
# all information and control, but suited for a height constrained screen

# It is recommended to have python-posix_ipc and
# <https://github.com/maandree/pdeath> installed

import os
import sys
import pwd
import time
import threading
import subprocess

from util import *

from plugins.alsa import ALSA
from plugins.clock import Clock
from plugins.cpu import CPU
from plugins.cpuinfo import CPUInfo
from plugins.cpuonline import CPUOnline
from plugins.dentrystate import DentryState
from plugins.df import Discs
from plugins.discstats import DiscStats
from plugins.files import Files
from plugins.inodestate import InodeState
from plugins.ipaddress import IPAddress
from plugins.leapsec import LeapSeconds
from plugins.loadavg import AverageLoad
from plugins.locks import Locks
from plugins.mem import Memory
from plugins.moc import MOC
from plugins.network import Network
from plugins.pacman import Pacman
from plugins.ping import Ping
from plugins.random import Random
from plugins.snmp import SNMP
from plugins.snmp6 import SNMP6
from plugins.softirqs import SoftIRQs
from plugins.swaps import Swaps
from plugins.tzclock import TZClock
from plugins.uname import Uname
from plugins.uptime import Uptime
from plugins.users import Users
from plugins.vmstat import VMStat
from plugins.weather import Weather
from plugins.xdisplay import XDisplay
from plugins.xkb import XKB
#from plugins.application import Application
#from plugins.hdparm import HDParm
#from plugins.image import Image
#from plugins.irc import II
#from plugins.kmsg import KMsg
#from plugins.lunar import Lunar
#from plugins.menu import Menu
#from plugins.ropty import ROPTY
#from plugins.solar import Solar

import Xlib.X, Xlib.XK, Xlib.protocol.event



OUTPUT, HEIGHT_PER_LINE, YPOS, TOP = 0, 12, 0, True

clock = Clock(sync_to = 0.5)

TERMINAL = 'terminator'



LEFT_BUTTON = 1
MIDDLE_BUTTON = 2
RIGHT_BUTTON = 3
SCROLL_UP = 4
SCROLL_DOWN = 5
SCROLL_LEFT = 6
SCROLL_RIGHT = 7
FORWARD_BUTTON = 8 # X1
BACKWARD_BUTTON = 9 # X2



limited = lambda v : min(max(int(v + 0.5), 0), 100)

def t_(f):
    try:
        f()
    except:
        time.sleep(1)

t = lambda f : (lambda : t_(f))

def pdeath(signal, *command):
    try:
        path = os.environ['PATH'].split(':')
        for p in path:
            p += '/pdeath'
            if os.access(p, os.X_OK, effective_ids = True):
                return (p, signal, *command)
    except:
        pass
    return command

HOME = pwd.getpwuid(os.getuid()).pw_dir



SEPARATOR = ' │ '

def invalidate():
    try:
        bar.invalidate()
    except:
        pass

class Entry:
    def __init__(self, wrap = None, left = True, line = 0, prev = None):
        self.left = left
        self.line = line
        self.prev = prev
        self.width = 0
        self.offset = 0
        self.last_text = None
        self.short_layout = None
        self.wrapped = self.function if wrap is None else wrap(self.function)
    
    def invalidate(self):
        wrapper = self.wrapped
        if isinstance(wrapper, Clocked):
            wrapper = wrapper.sometimes
        if isinstance(wrapper, Sometimes):
            wrapper.counter = 0
        invalidate()
    
    def action(self, col, button, x, y):
        pass
    
    def click(self, row, lcol, rcol, button, x, y):
        if row == self.line:
            col = (lcol if self.left else rcol) - self.offset
            if 0 <= col < self.width:
                if self.left:
                    x -= self.offset * bar.font_width
                else:
                    col = self.width - 1 - col
                    x = bar.width - x
                    x -= self.offset * bar.font_width
                    x = self.width * bar.font_width - x
                y -= self.line * HEIGHT_PER_LINE
                try:
                    self.action(col, button, x, y)
                except Exception as err:
                    print(str(err), file = sys.stderr, flush = True)
                return True
        return False
    
    def function(self):
        return SEPARATOR
    
    def __call__(self, *args, **kwargs):
        try:
            text = self.wrapped(*args, **kwargs)
            if text is not self.last_text:
                self.width = Bar.coloured_length(text)
            self.last_text = text
            return text
        except Exception as err:
            print(err)
    
    def update_position(self):
        if self.prev is not None:
            self.prev.update_position()
            self.offset = self.prev.offset + self.prev.width

class Group:
    def __init__(self, functions):
        global HEIGHT
        self.pattern = ''
        self.posupdate = []
        left = None
        right = None
        lineno = 0
        atleft = True
        newline = False
        lastright = None
        new_functions = []
        separator = None
        for entry in functions:
            if entry is None:
                newline = not atleft
                lineno += 1 if newline else 0
                atleft = not atleft
                continue
            entry.left = atleft
            entry.line = lineno
            if newline:
                self.pattern += '\n'
                newline = False
                if left is not None:
                    self.posupdate.append(left)
                if right is not None:
                    self.posupdate.append(right)
                left = None
                right = None
                lastright = None
            if entry.left:
                if left is not None:
                    separator = Entry(left = True)
                    new_functions.append(separator)
                    self.pattern += '%s'
                    separator.prev = left
                    left = separator
                entry.prev = left
                left = entry
            elif right is None:
                if left is not None:
                    self.pattern += '\0    '
                right = entry
                lastright = entry
            else:
                separator = Entry(left = False)
                new_functions.append(separator)
                self.pattern += '%s'
                lastright.prev = separator
                separator.prev = entry
                lastright = entry
            new_functions.append(entry)
            self.pattern += '%s'
        if left is not None:
            self.posupdate.append(left)
        if right is not None:
            self.posupdate.append(right)
        height = (lineno + 1) * HEIGHT_PER_LINE
        if HEIGHT < height:
            HEIGHT = height
        self.functions = new_functions



class MyXMonad(Entry):
    def __init__(self, *args, mod = Xlib.XK.XK_Super_L, ppWsSep = '', ppSep = '  ', **kwargs):
        self.text = ''
        self.text_short = ''
        self.ws_sep_len = len(ppWsSep)
        self.sep_len = len(ppSep)
        self.mod = mod
        self.show_full = False
        self.short_layout = None
        Entry.__init__(self, *args, **kwargs)
        xasync(lambda : forever(t(self.refresh)), name = 'xmonad')
    
    def action(self, col, button, x, y):
        if button == MIDDLE_BUTTON:
            self.show_full = not self.show_full
            self.invalidate()
            return
        text = self.text
        full = self.show_full
        UTF8_STRING = display.intern_atom('UTF8_STRING')
        _XMONAD_LOG = display.intern_atom('_XMONAD_LOG')
        _NET_DESKTOP_NAMES = display.intern_atom('_NET_DESKTOP_NAMES')
        xmonad_log = display.screen().root.get_full_property(_XMONAD_LOG, UTF8_STRING).value.decode('utf-8', 'replace')
        xmonad_log = xmonad_log.split(' : ')
        net_desktop_names = display.screen().root.get_full_property(_NET_DESKTOP_NAMES, UTF8_STRING).value.decode('utf-8', 'replace')
        net_desktop_names = net_desktop_names[:-1].split('\0')
        ws = 0
        ws_hit = False
        while ws < len(net_desktop_names):
            if ws > 0:
                col -= self.ws_sep_len
                if col < 0:
                    break
            width = len(net_desktop_names[ws] if full else str(ws + 1)) + 2
            if col < width:
                ws_hit = True
                break
            ws += 1
            col -= width
        if ws < len(net_desktop_names):
            if button == LEFT_BUTTON:
                self.switch_workspace(ws + 1)
            elif button in (SCROLL_UP, SCROLL_DOWN):
                xmonad_log = xmonad_log[0].split(' ')
                active = [net_desktop_names.index(w[1:-1]) for w in xmonad_log if w[:1] == '<']
                ws     = [net_desktop_names.index(w[1:-1]) for w in xmonad_log if w[:1] == '['][0]
                ws += -1 if button == SCROLL_UP else +1
                ws %= len(net_desktop_names)
                while ws in active:
                    ws += -1 if button == SCROLL_UP else +1
                    ws %= len(net_desktop_names)
                self.switch_workspace(ws + 1)
        elif button == LEFT_BUTTON:
            col -= self.sep_len
            layout = xmonad_log[1]
            if not self.show_full and self.short_layout is not None:
                layout = self.short_layout
            if col < len(layout) + 2:
                display.xtest_fake_input(Xlib.X.KeyPress, display.keysym_to_keycode(self.mod))
                display.xtest_fake_input(Xlib.X.KeyPress, display.keysym_to_keycode(Xlib.XK.XK_space))
                display.xtest_fake_input(Xlib.X.KeyRelease, display.keysym_to_keycode(Xlib.XK.XK_space))
                display.xtest_fake_input(Xlib.X.KeyRelease, display.keysym_to_keycode(self.mod))
                display.flush()
    
    def refresh(self):
        try:
            text = input()
        except:
            sys.exit(0)
        buf, esc = '', None
        for c in text:
            if esc is not None:
                esc += c
                if esc == '^':
                    buf += '^'
                    esc = None
                elif esc[-1] == ')':
                    if esc.startswith('bg(') or esc.startswith('fg('):
                        c = 4 if esc.startswith('bg(') else 3
                        esc = esc[3 : -1]
                        if esc == '':
                            buf += '\033[%i9m' % c
                        else:
                            r, g, b = esc[1 : 3], esc[3 : 5], esc[5 : 7]
                            r, g, b = int(r, 16), int(g, 16), int(b, 16)
                            r, g, b = str(r), str(g), str(b)
                            buf += '\033[%i8;2;%sm' % (c, ';'.join([r, g, b]))
                    esc = None
            elif c == '^':
                esc = ''
            else:
                buf += c
        self.text = buf
        short = ''
        space, esc, layout, lbuf = False, False, 0, ''
        ws = 1
        for c in buf:
            if esc:
                short += c
                esc = not (c == '~' or 'a' <= c.lower() <= 'z')
            elif c == '\033':
                esc = True
                if layout == 2:
                    layout = 3
                    end = ''
                    while lbuf.startswith(' '):
                        short += ' '
                        lbuf = lbuf[1:]
                    while lbuf.endswith(' '):
                        end += ' '
                        lbuf = lbuf[:-1]
                    self.short_layout = self.shorten_layout(lbuf)
                    short += self.short_layout + end
                short += c
            elif ws <= 9:
                if c in ' <>[]':
                    space = not space
                    if not space:
                        short += '%i' % ws
                        ws += 1
                        if ws == 10:
                            layout = 1
                    short += c
                elif not space:
                    short += c
            elif layout == 1:
                if c == ' ':
                    short += c
                else:
                    layout = 2
                    lbuf += c
            elif layout == 2:
                lbuf += c
            else:
                short += c
        self.text_short = short
        self.invalidate()
    
    def shorten_layout(self, text):
        text = text.split(' ')
        incl = []
        for word in text:
            if word not in ('ImageButtonDeco', 'Maximize', 'Minimize'):
                incl.append(word)
        return ' '.join(incl).replace('Mirror ', '\\')
    
    def switch_workspace(self, ws):
        display.xtest_fake_input(Xlib.X.KeyPress, display.keysym_to_keycode(self.mod))
        display.xtest_fake_input(Xlib.X.KeyPress, display.keysym_to_keycode(Xlib.XK.XK_0 + ws))
        display.xtest_fake_input(Xlib.X.KeyRelease, display.keysym_to_keycode(Xlib.XK.XK_0 + ws))
        display.xtest_fake_input(Xlib.X.KeyRelease, display.keysym_to_keycode(self.mod))
        display.flush()
    
    def function(self):
        return self.text if self.show_full else self.text_short


class MyScroll(Entry):
    def function(self):
        return '↓↑'
    
    def action(self, col, button, x, y):
        global groups, groupi, group
        if button in (LEFT_BUTTON, RIGHT_BUTTON, SCROLL_UP, SCROLL_DOWN):
            groupi = (groupi + (+1 if button in (LEFT_BUTTON, SCROLL_DOWN) else -1)) % len(groups)
            group = groups[groupi]
            self.invalidate()


class MyClock(Entry):
    def __init__(self, *args, format = '%Y-%m-%d %T', long_format = '%Y-(%m)%b-%d %T, %a w%V, %Z', tzs = None, **kwargs):
        self.default_format = format
        self.long_format = long_format
        self.clock = clock
        self.set_format(self.clock, self.default_format)
        self.tzs = [] if tzs is None else tzs
        self.tzi = 0
        mqueue_map['timefmt'] = self.mqueue
        mqueue_map['tz'] = self.mqueue
        Entry.__init__(self, *args, **kwargs)
    
    def mqueue(self, args):
        if args[0] == 'timefmt':
            args = args[1:]
            if len(args) == 0:
                self.action(0, RIGHT_BUTTON, 0, 0)
            else:
                self.set_format(self.clock, ' '.join(args))
                self.invalidate()
        if args[0] == 'tz':
            args = args[1:]
            if len(args) == 0:
                self.action(0, LEFT_BUTTON, 0, 0)
            else:
                old_clock = self.clock
                tz = '/'.join(args)
                try:
                    tzclock = TZClock(timezone = tz, format = self.clock.u_format)
                except:
                    try:
                        tzclock = TZClock(timezone = tz.upper(), format = self.clock.u_format)
                    except:
                        print('%s: unknown typezone: %s' % (sys.argv[0], tz), file = sys.stderr, flush = True)
                        return
                tzclock.u_format = tzclock.format
                self.clock = tzclock
                if old_clock is not clock:
                    del old_clock
                self.invalidate()
    
    def action(self, col, button, x, y):
        if button == LEFT_BUTTON:
            if self.clock is clock:
                clock.utc = not clock.utc
                self.set_format(clock, self.clock.u_format)
            else:
                self.set_format(clock, self.clock.u_format)
                self.clock = clock
            self.invalidate()
        elif button == RIGHT_BUTTON:
            if self.clock.u_format == self.default_format:
                self.set_format(self.clock, self.long_format)
            else:
                self.set_format(self.clock, self.default_format)
            self.invalidate()
        elif button in (SCROLL_UP, SCROLL_DOWN):
            i = self.tzi + (+1 if button == SCROLL_UP else -1)
            if not (0 <= i <= len(self.tzs)):
                return
            self.tzi = i
            old_clock = self.clock
            if i > 0:
                tzclock = TZClock(timezone = self.tzs[i - 1], format = self.clock.u_format)
                tzclock.u_format = tzclock.format
                self.clock = tzclock
            else:
                self.clock = clock
            if old_clock is not clock:
                del old_clock
            self.invalidate()
    
    def set_format(self, clck, format):
        clck.u_format = format
        if not (clck is clock and clck.utc):
            clck.format = format
        else:
            fmt, esc = '', False
            for c in format:
                if esc:
                    fmt += c
                    if c == '%' or 'a' <= c.lower() <= 'z':
                        esc = False
                        if c == 'Z':
                            while fmt[-1] != '%':
                                fmt = fmt[:-1]
                            fmt = fmt[:-1] + 'UTC'
                elif c == '%':
                    esc = True
                    fmt += c
                else:
                    fmt += c
            clck.format = fmt
    
    def function(self):
        clck = self.clock
        colour = '0'
        if clck is not clock or clck.utc:
            colour += ';7'
        return '\033[%sm%s\033[00m' % (colour, clck.read())


class MyComputer(Entry):
    def __init__(self, *args, locks = None, **kwargs):
        self.have_linux_libre, self.have_pacman = True, None
        self.linux_installed, self.linux_latest = None, None
        self.last_uname_read = ''
        self.last_users_read = ''
        self.xdisplay = None
        self.you = pwd.getpwuid(os.getuid()).pw_name
        self.display = 0
        self.show_detailed = False
        self.keys = []
        if locks is None:
            locks = ['num', 'cap']
        self.num_lock = 'num' in locks or 'number' in locks or 'numerical' in locks or 'numpad' in locks
        self.cap_lock = 'cap' in locks or 'caps' in locks
        self.scr_lock = 'scr' in locks or 'scroll' in locks or 'scrl' in locks
        if self.num_lock:
            self.keys.append(Xlib.XK.XK_Num_Lock)
        if self.cap_lock:
            self.keys.append(Xlib.XK.XK_Caps_Lock)
        if self.scr_lock:
            self.keys.append(Xlib.XK.XK_Scroll_Lock)
        Entry.__init__(self, *args, **kwargs)
    
    def action(self, col, button, x, y):
        if button == LEFT_BUTTON:
            if self.display == 3:
                col -= 5
                if col % 4 == 3:
                    return
                col //= 4
                key = self.keys[col]
                display.xtest_fake_input(Xlib.X.KeyPress, display.keysym_to_keycode(key))
                display.xtest_fake_input(Xlib.X.KeyRelease, display.keysym_to_keycode(key))
                display.flush()
        elif button == MIDDLE_BUTTON:
            self.show_detailed = not self.show_detailed
            self.invalidate()
        elif button == RIGHT_BUTTON:
            if self.display == 0:
                xasync(lambda : subprocess.Popen(['mate-system-monitor']).wait())
            else:
                self.invalidate()
        elif button == SCROLL_UP:
            self.display = min(self.display + 1, 2) ## TODO the keyboard support is not too good
            self.invalidate()
        elif button == SCROLL_DOWN:
            self.display = max(self.display - 1, 0)
            self.invalidate()
    
    def function_uname(self):
        uname = Uname()
        nodename = uname.nodename
        kernel_release = uname.kernel_release
        operating_system = uname.operating_system
        
        lts = '-lts' if kernel_release.lower().endswith('-lts') else ''
        if self.have_pacman is None:
            self.have_pacman = True
            try:
                self.linux_installed = Pacman('linux-libre' + lts, True)
            except:
                self.have_linux_libre = False
                try:
                    self.linux_installed = Pacman('linux' + lts, True)
                except:
                    self.have_pacman = False
            if self.have_pacman:
                try:
                    self.linux_latest = Pacman(('linux-libre' if self.have_linux_libre else 'linux') + lts, False)
                except:
                    self.have_pacman = None
        elif self.have_pacman:
            try:
                self.linux_installed = Pacman(('linux-libre' if self.have_linux_libre else 'linux') + lts, True)
                self.linux_latest = Pacman(('linux-libre' if self.have_linux_libre else 'linux') + lts, False)
            except:
                self.have_pacman = None
        
        if (self.have_pacman is not None) and self.have_pacman:
            linux_running = kernel_release.split('-')
            linux_running, kernel_release = linux_running[:2], linux_running[2:]
            linux_running = '-'.join(linux_running)
            kernel_release = '-' + '-'.join(kernel_release)
            self.linux_installed = self.linux_installed.version
            self.linux_latest = self.linux_latest.version
            if self.linux_installed == self.linux_latest:
                if linux_running == self.linux_installed:
                    linux_running = '\033[32m%s\033[39m' % linux_running
            else:
                if linux_running == self.linux_installed:
                    linux_running = '\033[33m%s\033[39m' % linux_running
                else:
                    linux_running = '\033[31m%s\033[39m' % linux_running
            kernel_release = linux_running + kernel_release
        
        rc = '%s %s %s'
        rc %= (nodename, kernel_release, operating_system)
        self.last_uname_read = rc
        return rc
    
    def function_users(self): ## TODO use inotify
        users = Users('devfs').users
        def colour_user(user):
            if user == 'root':          return '\033[31m%s\033[39m'
            elif not user == self.you:  return '\033[33m%s\033[39m'
            else:                       return '%s'
        users = ['%s{%i}' % (colour_user(u) % u, len(users[u])) for u in users.keys()]
        users = 'Usr: %s' % (' '.join(users))
        self.last_users_read = users
        return users
    
    def function_xdisplay(self):
        if self.xdisplay is None:
            x = XDisplay()
            if x.connection is None:
                self.xdisplay = 'No DISPLAY environment variable set'
                self.xdisplay_detailed = self.xdisplay
            else:
                self.xdisplay = 'X: %s' % x.connection
                self.xdisplay_detailed  = 'Host: %s' % ('(localhost)' if x.host is None else x.host)
                self.xdisplay_detailed += SEPARATOR
                self.xdisplay_detailed += 'Display: %s' % (x.display)
                if x.screen is not None:
                    self.xdisplay_detailed += SEPARATOR
                    self.xdisplay_detailed += 'Screen: %s' % (x.screen)
                if x.vt is not None:
                    self.xdisplay += '%sVt: %i' % (SEPARATOR, x.vt)
                    self.xdisplay_detailed += '%sVt: %i' % (SEPARATOR, x.vt)
        return self.xdisplay_detailed if self.show_detailed else self.xdisplay
    
    def function_xkb(self): ## add update listener
        xkb = XKB().get_locks()
        kbd = 'Kbd:'
        if self.num_lock:
            kbd += ' \033[3%imnum\033[0m' % (1 if (xkb & XKB.NUM)    == 0 else 2)
        if self.cap_lock:
            kbd += ' \033[3%imcap\033[0m' % (1 if (xkb & XKB.CAPS)   == 0 else 2)
        if self.scr_lock:
            kbd += ' \033[3%imscr\033[0m' % (1 if (xkb & XKB.SCROLL) == 0 else 2)
        return kbd
    
    def function(self):
        if self.display == 0:
            return self.function_uname()
        elif self.display == 1:
            return self.function_users()
        elif self.display == 2:
            return self.function_xdisplay()
        elif self.display == 3:
            return self.function_xkb()


class MyWeather(Entry):
    def __init__(self, *args, stations = None, fahrenheit = False, wind = 'm/s', from_wind = False, visibility = 'km', **kwargs):
        self.semaphore = threading.Semaphore()
        self.stations = [MyWeather.get_metar_station()] if stations is None else [s.upper() for s in stations]
        self.reports = [None] * len(self.stations)
        self.up_to_date = [False] * len(self.stations)
        self.in_deg_f = fahrenheit
        self.wind_unit = wind
        self.from_wind = from_wind
        self.visibility_unit = visibility
        self.show_temp = True
        self.show_wind_speed = False
        self.show_wind_gusts = False
        self.show_wind_dir = False
        self.show_wind_chill = False
        self.show_humidity = False
        self.show_dew = False
        self.show_pressure = False
        self.show_visibility = False
        self.show_sky = False
        self.show_station = False
        self.station = 0
        self.updated = False
        self.segments = []
        self.refresh = Sometimes(lambda : xasync(self.refresh_, name = 'weather'), 20 * 60 * 4)
        self.refresh()
        Entry.__init__(self, *args, **kwargs)
    
    def action(self, col, button, x, y):
        if button == MIDDLE_BUTTON:
            self.show_temp = True
            self.show_wind_speed = True
            self.show_wind_gusts = True
            self.show_wind_dir = True
            self.show_wind_chill = True
            self.show_humidity = True
            self.show_dew = True
            self.show_pressure = True
            self.show_visibility = True
            self.show_sky = True
            self.show_station = True
            self.invalidate()
        elif button == RIGHT_BUTTON:
            self.refresh.counter = 0
            self.refresh()
        elif button in (LEFT_BUTTON, SCROLL_UP, SCROLL_DOWN):
            index = None
            for i, seg in enumerate(self.segments):
                if seg is None:
                    continue
                (x, width) = seg
                if 0 <= col - x < width:
                    index = i
                    break
            if index is None:
                return
            if index == 0: # station
                if button == LEFT_BUTTON:
                    self.show_station = False
                elif button == SCROLL_UP:
                    station = self.station
                    if station + 1 < len(self.stations):
                        self.station = station + 1
                else:
                    station = self.station
                    if station > 0:
                        self.station = station - 1
            elif index == 1: # temperature
                if button == LEFT_BUTTON:
                    self.show_temp = False
                else:
                    self.in_deg_f = button == SCROLL_UP
            elif index == 2: # wind speed/gusts
                if button == LEFT_BUTTON:
                    if self.towards is None or col < self.towards:
                        self.show_wind_speed = False
                    else:
                        self.show_wind_gusts = False
                else:
                    if self.wind_unit == 'm/s':
                        self.wind_unit = 'mph' if button == SCROLL_UP else 'm/s'
                    elif self.wind_unit == 'mph':
                        self.wind_unit = 'kn' if button == SCROLL_UP else 'm/s'
                    elif self.wind_unit in ('kn', 'kt', 'knot', 'knots'):
                        self.wind_unit = 'km/h' if button == SCROLL_UP else 'mph'
                    elif self.wind_unit in ('km/h', 'kmph'):
                        self.wind_unit = 'ft/s' if button == SCROLL_UP else 'kn'
                    elif self.wind_unit in ('ft/s', 'ftps'):
                        self.wind_unit = 'b' if button == SCROLL_UP else 'km/h'
                    else:
                        self.wind_unit = 'b' if button == SCROLL_UP else 'ft/s'
            elif index == 3: # wind direction
                if button == LEFT_BUTTON:
                    self.show_wind_dir = False
                else:
                    self.from_wind = button == SCROLL_UP
            elif index == 4: # wind chill
                if button == LEFT_BUTTON:
                    self.show_wind_chill = False
                else:
                    self.in_deg_f = button == SCROLL_UP
            elif index == 5: # relative humidity
                if button == LEFT_BUTTON:
                    self.show_humidity = False
                else:
                    return
            elif index == 6: # dew point
                if button == LEFT_BUTTON:
                    self.show_dew = False
                else:
                    self.in_deg_f = button == SCROLL_UP
            elif index == 7: # pressure
                if button == LEFT_BUTTON:
                    self.show_pressure = False
                else:
                    return
            elif index == 8: # visibility
                if button == LEFT_BUTTON:
                    self.show_visibility = False
                elif button == SCROLL_UP:
                    unit = self.visibility_unit
                    if unit in {'km' : 'm', 'm' : 'mi'}:
                        self.visibility_unit = {'km' : 'm', 'm' : 'mi'}[unit]
                else:
                    unit = self.visibility_unit
                    if unit in {'mi' : 'm', 'mile' : 'm', 'm' : 'km'}:
                        self.visibility_unit = {'mi' : 'm', 'mile' : 'm', 'm' : 'km'}[unit]
            elif index == 9: # sky conditions
                if button == LEFT_BUTTON:
                    self.show_sky = False
                else:
                    return
            self.invalidate()
    
    def refresh_(self):
        if self.semaphore.acquire(blocking = False):
            for index, station in enumerate(self.stations):
                try:
                    self.reports[index] = Weather(station)
                    self.up_to_date[index] = True
                except:
                    self.up_to_date[index] = False
            self.semaphore.release()
            self.invalidate()
    
    def invalidate(self):
        self.updated = False
        Entry.invalidate(self)
    
    def get_weather(self, index):
        station = self.stations[index]
        report = self.reports[index]
        up_to_date = self.up_to_date[index]
        station = station[0] + station[1:].lower()
        
        if report is None:
            if self.show_station:
                return '%s: ?' % station
            else:
                return '?'
        
        text = []
        
        if self.show_temp and report.temp is not None:
            value = report.temp
            colour = '34'
            if value < -10:  colour = '39;44'
            if value >= 18:  colour = '39'
            if value >= 25:  colour = '33'
            if value >= 30:  colour = '31'
            if self.in_deg_f:
                value = value * 9 / 5 + 32
            value = '\033[%sm%.0f\033[0m%s' % (colour, value, '°F' if self.in_deg_f else '°C')
            text.append(value)
        else:
            text.append(None)
        
        if self.show_wind_speed and report.wind_speed is not None:
            knot = report.wind_speed
            kmph = knot * 1.852 # km/h
            mps = kmph / 3.6 # m/s
            mph = knot * 1.151 # mph
            ftps = mps * 3.281 # ft/s
            beaufort = (mps / 0.8365) ** (2 / 3) # B
            if self.wind_unit in ('kn', 'kt', 'knot', 'knots'):
                value, unit = knot, 'kn'
            elif self.wind_unit in ('km/h', 'kmph'):
                value, unit = kmph, 'km/h'
            elif self.wind_unit == 'mph':
                value, unit = mph, 'mph'
            elif self.wind_unit in ('ft/s', 'ftps'):
                value, unit = ftps, 'ft/s'
            elif self.wind_unit.lower() in ('beaufort', 'beaufort scale', 'bf', 'bt', 'b'):
                value, unit = beaufort, 'B'
            else:
                value, unit = mps, 'm/s'
            beaufort = int(beaufort + 0.5)
            colour = '32'
            if beaufort >= 1:   colour = '39'
            if beaufort >= 3:   colour = '32'
            if beaufort >= 7:   colour = '33'
            if beaufort >= 10:  colour = '31'
            if beaufort >= 12:  colour = '39;41'
            wind = '\033[%sm%.0f\033[0m' % (colour, value)
            if self.show_wind_gusts and report.wind_gusts is not None:
                knot = report.wind_gusts
                kmph = knot * 1.852 # km/h
                mps = kmph / 3.6 # m/s
                mph = knot * 1.151 # mph
                ftps = mps * 3.281 # ft/s
                beaufort = (mps / 0.8365) ** (2 / 3) # B
                if self.wind_unit in ('kn', 'kt', 'knot', 'knots'):
                    value = knot
                elif self.wind_unit in ('km/h', 'kmph'):
                    value = kmph
                elif self.wind_unit == 'mph':
                    value = mph
                elif self.wind_unit in ('ft/s', 'ftps'):
                    value = ftps
                elif self.wind_unit.lower() in ('beaufort', 'beaufort scale', 'bf', 'bt', 'b'):
                    value = beaufort
                else:
                    value = mps
                beaufort = int(beaufort + 0.5)
                colour = '32'
                if beaufort >= 1:   colour = '39'
                if beaufort >= 3:   colour = '32'
                if beaufort >= 7:   colour = '33'
                if beaufort >= 10:  colour = '31'
                if beaufort >= 12:  colour = '39;41'
                wind += '→\033[%sm%.0f\033[0m' % (colour, value)
            wind += unit
            text.append(wind)
        else:
            text.append(None)
        
        def wind_dir(direction):
            if not self.from_wind:
                direction += 180
            direction %= 360
            if direction < 0:
                direction += 360
            if (direction < 90):
                if direction == 0:
                    return 'N'
                if direction <= 45:
                    return 'N%.0f°E' % direction
                return 'E%.0f°N' % (90 - direction)
            elif (90 <= direction < 180):
                if direction == 0:
                    return 'E'
                direction -= 90
                if direction <= 45:
                    return 'E%.0f°S' % direction
                return 'S%.0f°E' % (90 - direction)
            elif (180 <= direction < 270):
                if direction == 0:
                    return 'S'
                direction -= 180
                if direction <= 45:
                    return 'S%.0f°W' % direction
                return 'W%.0f°S' % (90 - direction)
            else:
                if direction == 0:
                    return 'W'
                direction -= 270
                if direction <= 45:
                    return 'W%.0f°N' % direction
                return 'N%.0f°W' % (90 - direction)
        if not self.show_wind_dir:
            wind = None
        elif report.wind_var is not None:
            wind = wind_dir(report.wind_var[0]) + '-' + wind_dir(report.wind_var[1])
        elif report.wind_dir is not None:
            wind = wind_dir(report.wind_dir)
        else:
            wind = None
        if wind is not None:
            if self.from_wind:
                wind += '→'
            else:
                wind = '→' + wind
            text.append(wind)
        else:
            text.append(None)
        
        if self.show_wind_chill and report.wind_chill is not None:
            value = report.wind_chill
            # Coloured by frostbite time, however the wind is not taken
            # into account so the colour is approximate
            colour = '39'
            if value <= -28:  colour = '33'
            if value <= -37:  colour = '31'
            if value <= -46:  colour = '39;41'
            if self.in_deg_f:
                value = value * 9 / 5 + 32
            value = 'w\033[%sm%.0f\033[0m%s' % (colour, value, '°F' if self.in_deg_f else '°C')
            text.append(value)
        else:
            text.append(None)
        
        if self.show_humidity and report.humidity is not None:
            value = report.humidity
            colour = '34'
            if value >= 26:  colour = '32'
            if value >= 31:  colour = '39'
            if value >= 37:  colour = '33'
            if value >= 52:  colour = '31'
            if value >= 73:  colour = '39;41'
            value = '\033[%sm%.0f\033[0m%%' % (colour, value)
            text.append(value)
        else:
            text.append(None)
        
        if self.show_dew and report.dew is not None:
            value = report.dew
            colour = '34'
            if value >= 10:  colour = '32'
            if value >= 13:  colour = '39'
            if value >= 16:  colour = '33'
            if value >= 21:  colour = '31'
            if value >= 26:  colour = '39;41'
            if self.in_deg_f:
                value = value * 9 / 5 + 32
            value = 'd\033[%sm%.0f\033[0m%s' % (colour, value, '°F' if self.in_deg_f else '°C')
            text.append(value)
        else:
            text.append(None)
        
        if self.show_pressure and report.pressure is not None:
            text.append('%.0fhPa' % report.pressure)
        else:
            text.append(None)
        
        if self.show_visibility and report.visibility is not None:
            mile = report.visibility
            km = mile * 1.609344
            m = mile * 1609.344
            if self.visibility_unit in ('mile', 'mi'):
                value, unit = mile, 'mi'
            elif self.visibility_unit == 'm':
                value, unit = m, 'm'
            else:
                value, unit = km, 'km'
            text.append('%.0f%s' % (value, unit))
        else:
            text.append(None)
        
        if self.show_sky and 'Sky conditions' in report.fields:
            value = report.fields['Sky conditions']
            if not value == '':
                text.append(value)
            else:
                text.append(None)
        else:
            text.append(None)
        
        segments = []
        x = 0
        if self.show_station:
            w = len(station)
            segments.append((x, w))
            x += w + 2
        else:
            segments.append(None)
        x -= 1
        self.towards = None
        for i, segment in enumerate(text):
            if segment is None:
                segments.append(None)
            else:
                if i == 1 and '→' in segment:
                    self.towards = x + Bar.coloured_length(segment.split('→')[0])
                w = Bar.coloured_length(segment)
                x += 1
                segments.append((x, w))
                x += w
        self.segments = segments
        text = [s for s in text if s is not None]
        
        if len(text) == 0:
            return station
        
        if not up_to_date:
            if len(text) <= 1:
                text = ' '.join(text) + '?'
            else:
                text = ' '.join(text) + ' ?'
        else:
            text = ' '.join(text)
        if self.show_station:
            text = '%s: %s' % (station, text)
        return text
    
    def function(self):
        if not self.updated:
            self.updated = True
            self.text = self.get_weather(self.station)
        rc = self.text
        self.refresh()
        return rc
    
    @staticmethod
    def get_metar_station():
        try:
            with open(HOME + '/.config/metar', 'rb') as file:
                station = file.read()
        except:
            try:
                with open('/etc/metar', 'rb') as file:
                    station = file.read()
            except:
                print('~/.config/metar is not set', file = sys.stderr, flush = True)
                station = b'ESSA'
        return station.decode('utf-8', 'strict').split('\n')[0].upper()


class MyNews(Entry):
    def __init__(self, *args, status_path = None, **kwargs):
        if status_path is not None:
            self.status_path = status_path
        else:
            self.status_path = HOME + '/.var/lib/featherweight/status'
        self.get_news()
        Entry.__init__(self, *args, **kwargs)
        xasync(self.refresh, name = 'news')
    
    def action(self, col, button, x, y):
        if button == LEFT_BUTTON:
            xasync(lambda : subprocess.Popen([TERMINAL, '-e', 'featherweight']).wait())
        elif button == RIGHT_BUTTON:
            xasync(lambda : subprocess.Popen(['featherweight', '--update', '--system']).wait())
    
    def get_news(self):
        try:
            with open(self.status_path, 'rb') as file:
                status = int(file.read().decode('utf-8', 'replace').replace('\n', ''))
        except:
            status = 0
        colour = '31'
        if   status <=  0:  colour = '0'
        elif status <=  5:  colour = '32'
        elif status <= 10:  colour = '33'
        self.text = 'News: \033[%sm%i\033[0m' % (colour, status)
    
    def refresh(self):
        while True:
            try:
                spawn_read(*pdeath('HUP', 'inotifywait', self.status_path, '-e', 'close_write'))
                self.get_news()
            except:
                time.sleep(1)
    
    def function(self):
        return self.text


class MyALSA(Entry):
    def __init__(self, *args, timeout = None, sleep = None, mixers = None, **kwargs):
        if timeout is not None:
            self.timeout = timeout
        else:
            self.timeout = 5
        if sleep is not None:
            self.sleep = sleep
        else:
            self.sleep = 5
        if mixers is not None:
            mixers = mixers
        else:
            mixers = ('Master', 'PCM')
        self.alsa = []
        for mixer in mixers:
            try:
                self.alsa.append(ALSA(mixername = mixer))
            except:
                pass
        try:
            import posix_ipc
            method = 0
        except:
            method = 2
            try:
                path = os.environ['PATH'].split(':')
                for p in path:
                    p += '/cmdipc'
                    if os.access(p, os.F_OK | os.X_OK, effective_ids = True):
                        method = 1
                        break
            except:
                pass
        self.sep_width = Bar.coloured_length(SEPARATOR)
        self.get_volume()
        Entry.__init__(self, *args, **kwargs)
        xasync((self.refresh_posix_ipc, self.refresh_cmdipc, self.refresh_wait)[method], name = 'alsa')
    
    def action(self, col, button, x, y):
        mixer = 0
        mixer_text = self.text.split(SEPARATOR)
        while mixer < len(mixer_text): ## the limit is just a precaution
            mixer_width = Bar.coloured_length(mixer_text[mixer])
            if col >= mixer_width:
                col -= mixer_width
                if col < self.sep_width:
                    return
                col -= self.sep_width
            else:
                break
            mixer += 1
        mixer_text = mixer_text[mixer]
        
        channel = -1
        mixer_text  = mixer_text.split(': ')
        mixer_label = ': '.join(mixer_text[:-1]) + ': '
        mixer_text  = mixer_text[-1].split(' ')
        mixer_label = Bar.coloured_length(mixer_label)
        if col >= mixer_label:
            col -= mixer_label
            while channel < len(mixer_text): ## the limit is just a precaution
                channel += 1
                channel_width = Bar.coloured_length(mixer_text[channel])
                if col < channel_width:
                    break
                col -= channel_width
                if col < 1:
                    channel = -1
                    break
                col -= 1
        
        mixer = self.alsa[mixer]
        if button == LEFT_BUTTON:
            muted = mixer.get_mute()
            muted = not (any(muted) if channel == -1 else muted[channel])
            mixer.set_mute(muted, channel)
        elif button == RIGHT_BUTTON:
            volume = mixer.get_volume()
            volume = limited(sum(volume) / len(volume))
            mixer.set_volume(volume, -1)
        elif button in (SCROLL_UP, SCROLL_DOWN):
            volume = mixer.get_volume()
            adj = -5 if button == SCROLL_DOWN else 5
            if channel < 0:
                for ch in range(len(volume)):
                    mixer.set_volume(limited(volume[ch] + adj), ch)
            else:
                mixer.set_volume(limited(volume[channel] + adj), channel)
        else:
            return
        self.get_volume()
        self.invalidate()
    
    def get_volume(self):
        text_v = lambda v : '--%' if v is None else ('%2i%%' % v)[:3]
        read_m = lambda m : '%s: %s' % (m.mixername, ' '.join(text_v(v) for v in m.get_volume()))
        self.text = SEPARATOR.join(read_m(m) for m in self.alsa)
    
    def refresh_posix_ipc(self):
        import posix_ipc
        s = posix_ipc.Semaphore('/.xpybar.alsa.0', posix_ipc.O_CREAT, 0o600, 1)
        c = posix_ipc.Semaphore('/.xpybar.alsa.1', posix_ipc.O_CREAT, 0o600, 0)
        q = posix_ipc.Semaphore('/.xpybar.alsa.2', posix_ipc.O_CREAT, 0o600, 0)
        while True:
            try:
                s.release() ; c.release()
                try:
                    q.acquire(timeout)
                except posix_ipc.BusyError:
                    pass
                c.acquire(None)
                s.acquire(None)
                self.get_volume()
            except:
                time.sleep(self.sleep)
    
    def refresh_cmdipc(self):
        command = pdeath('HUP', 'cmdipc', '-PCck', '/.xpybar.alsa.0/.xpybar.alsa.1/.xpybar.alsa.2', 'wait', '-b%i' % self.timeout)
        while True:
            try:
                spawn_read(*command)
                self.get_volume()
            except:
                time.sleep(self.sleep)
    
    def refresh_wait(self):
        while True:
            try:
                time.sleep(self.sleep)
                self.get_volume()
            except:
                pass
    
    def function(self):
        return self.text


class MyBattery(Entry):
    def __init__(self, *args, **kwargs):
        self.show_all = False
        self.show_battery = 0
        Entry.__init__(self, *args, **kwargs)
    
    def action(self, col, button, x, y):
        if button == LEFT_BUTTON:
            self.show_all = not self.show_all
            self.invalidate()
        elif button == SCROLL_UP:
            self.show_battery += 1
            self.invalidate()
        elif button == SCROLL_DOWN:
            self.show_battery -= 1
            if self.show_battery < 0:
                self.show_battery = 0
            self.invalidate()
    
    def colourise_(self, text):
        try:
            value = text.replace(',', '.')
            value = float(value) if '.' in value else int(value)
            colour = '39'
            if value < 80:  colour = '32'
            if value < 50:  colour = '33'
            if value < 15:  colour = '31'
            if value <  5:  colour = '7;31'
            return '\033[%sm%s\033[0m' % (colour, text)
        except:
            return text
    
    def colourise(self, text):
        buf = []
        state = None
        for c in reversed(text):
            if c == '\t':
                c = ' '
            if state is not None:
                if c == ' ':
                    if state == '':
                        buf.append(c)
                        continue
                    buf.append(self.colourise_(state))
                    buf.append(c)
                    state = None
                else:
                    state = c + state
            elif c == '%':
                buf.append(c)
                state = ''
            else:
                buf.append(c)
        if state is not None and state != '':
            buf.append(self.colourise_(state))
        return ''.join(reversed(buf))
    
    def function(self):
        try:
            data = spawn_read('acpi').split('\n')
        except:
            return 'acpi missing'
        if self.show_battery >= len(data):
            self.show_battery = len(data) - 1
        if len(data) == 1:
            return self.colourise(': '.join(data[0].split(': ')[1:]))
        if self.show_all:
            data = [self.colourise(': '.join(datum.split(': ')[1:])) for datum in data]
            data = SEPARATOR.join('Bat%i: %s' % (i, datum) for i, datum in enumerate(data))
            return data
        data = data[self.show_battery]
        data = ': '.join(data.split(': ')[1:])
        data = 'Bat%i: %s' % (self.show_battery, self.colourise(data))
        return data


class MyCPU(Entry):
    def __init__(self, *args, **kwargs):
        self.last_sirq_split = SoftIRQs()
        cpu = CPU()
        self.last_time = time.monotonic()
        self.last_cpu_stat   = cpu.cpu
        self.last_cpu_total  = sum(cpu.cpu)
        self.last_cpus_total = [sum(c) for c in cpu.cpus]
        self.last_cpus_stat  = [[c[s] for c in cpu.cpus] for s in range(len(cpu.cpu))]
        self.last_intr = cpu.intr_total
        self.last_ctxt = cpu.ctxt
        self.last_fork = cpu.processes
        self.last_sirq = cpu.softirq_total
        self.none = self.colourise(None)
        self.coloured = tuple(self.colourise(i) for i in range(101))
        self.show_all = False
        self.show_function = 0
        self.functions = [ lambda *v : self.function_cpu(CPU.idle, '', *v)
                         , self.function_intr
                         , self.function_ctxt
                         , self.function_fork
                         , self.function_proc
                         , self.function_sirq
                         ]
        for key in self.last_sirq_split.keys:
            make = lambda key : (lambda *v : self.function_sirq_split(key, *v))
            self.functions.append(make(key))
        self.functions += [ lambda *v : self.function_cpu(CPU.user,       '(user)',       *v)
                          , lambda *v : self.function_cpu(CPU.nice,       '(nice)',       *v)
                          , lambda *v : self.function_cpu(CPU.system,     '(system)',     *v)
                          , lambda *v : self.function_cpu(CPU.iowait,     '(iowait)',     *v)
                          , lambda *v : self.function_cpu(CPU.irq,        '(irq)',        *v)
                          , lambda *v : self.function_cpu(CPU.softirq,    '(softirq)',    *v)
                          , lambda *v : self.function_cpu(CPU.steal,      '(steal)',      *v)
                          , lambda *v : self.function_cpu(CPU.guest,      '(guest)',      *v)
                          , lambda *v : self.function_cpu(CPU.guest_nice, '(guest nice)', *v)
                          , self.function_load
                          , self.function_task
                          , self.function_pid
                          , self.function_online
                          ]
        Entry.__init__(self, *args, **kwargs)
    
    def action(self, col, button, x, y):
        if button == LEFT_BUTTON:
            self.show_all = not self.show_all
            self.invalidate()
        elif button == SCROLL_UP:
            n = self.show_function + 1
            if n < len(self.functions):
                self.show_function = n
                self.invalidate()
        elif button == SCROLL_DOWN:
            n = self.show_function - 1
            if n >= 0:
                self.show_function = n
                self.invalidate()
    
    def usage(self, now_stat, now_total, last_stat, last_total, idle):
        total = now_total - last_total
        stat = now_stat - last_stat
        return None if total == 0 else (total - stat if idle else stat) * 100 / total
    
    def colourise_(self, value):
        if value is None:
            return self.none
        else:
            return self.coloured[limited(value)]
    
    def colourise(self, value):
        if value is None:
            return '--%'
        elif value >= 100:
            return '\033[31m100\033[0m'
        colour = '39'
        if value >= 5:   colour = '32'
        if value >= 50:  colour = '33'
        if value >= 90:  colour = '31'
        return '\033[%sm%2i\033[0m%%' % (colour, value)
    
    def function_cpu(self, stat, name, cpu, display, tdiff):
        now_cpu_stat   = self.now_cpu_stat[stat]
        now_cpus_stat  = self.now_cpus_stat[stat]
        last_cpus_stat = self.last_cpus_stat[stat]
        last_cpu_stat  = self.last_cpu_stat[stat]
        
        if display:
            cpu = (now_cpu_stat, self.now_cpu_total, last_cpu_stat, self.last_cpu_total)
            cpu = self.colourise_(self.usage(*cpu, idle = stat == CPU.idle))
            if self.show_all:
                cpus = (now_cpus_stat, self.now_cpus_total, last_cpus_stat, self.last_cpus_total)
                cpus = ' '.join(self.colourise_(self.usage(*c, idle = stat == CPU.idle)) for c in zip(*cpus))
                cpu = 'Cpu%s: %s : %s' % (name, cpus, cpu)
            else:
                cpu = 'Cpu%s: %s' % (name, cpu)
        
        return cpu
    
    def function_intr(self, cpu, display, tdiff):
        now_intr = cpu.intr_total
        if display:
            cpu = 'Intr: %.0fHz' % ((now_intr - self.last_intr) / tdiff)
        self.last_intr = now_intr
        return cpu
    
    def function_ctxt(self, cpu, display, tdiff):
        now_ctxt = cpu.ctxt
        if display:
            cpu = 'Ctxt: %.0fHz' % ((now_ctxt - self.last_ctxt) / tdiff)
        self.last_ctxt = now_ctxt
        return cpu
    
    def function_fork(self, cpu, display, tdiff):
        now_fork = cpu.processes
        if display:
            cpu = 'Fork: %.0fHz' % ((now_fork - self.last_fork) / tdiff)
        self.last_fork = now_fork
        return cpu
    
    def function_sirq(self, cpu, display, tdiff):
        now_sirq = cpu.softirq_total
        if display:
            cpu = 'Sirq: %.0fHz' % ((now_sirq - self.last_sirq) / tdiff)
        self.last_sirq = now_sirq
        return cpu
    
    def function_proc(self, cpu, display, tdiff):
        if display:
            cpu = 'Proc: %irun %iio' % (cpu.procs_running, cpu.procs_blocked)
        return cpu
    
    def function_load(self, cpu, display, tdiff):
        if display:
            load = AverageLoad()
            cpu = 'Load: %.2f %.2f %.2f' % (load.total_avg_5_min, load.total_avg_10_min, load.total_avg_15_min)
        return cpu
    
    def function_task(self, cpu, display, tdiff):
        if display:
            load = AverageLoad()
            cpu = 'Task: %i/%i (%.0f%%)' % (load.active_tasks, load.total_tasks, load.active_tasks * 100 / load.total_tasks)
        return cpu
    
    def function_pid(self, cpu, display, tdiff):
        if display:
            load = AverageLoad()
            cpu = 'Last PID: %i' % load.last_pid
        return cpu
    
    def function_online(self, cpu, display, tdiff):
        if display:
            try:
                cpu, cpuonline, on, off = '', CPUOnline(), 0, 0
                online, offline = cpuonline.online, cpuonline.offline
                while on < len(online) and off < len(offline):
                    if online[on] < offline[off]:
                        cpu += ' \033[32m%s\033[0m' % online[on]
                        on += 1
                    else:
                        cpu += ' \033[31m%s\033[0m' % offline[off]
                        off += 1
                cpu += ''.join(' \033[32m%s\033[0m' % c for c in online[on:])
                cpu += ''.join(' \033[31m%s\033[0m' % c for c in offline[off:])
                cpu = 'Online:%s' % cpu
            except Exception as e:
                cpu = str(e)
        return cpu
    
    def function_sirq_split(self, key, cpu, display, tdiff):
        if display:
            label = 'Sirq(%s)' % key.lower().replace('_', ' ').replace(' rx', '↓').replace(' tx', '↑')
            now = self.now_sirq_split[key]
            last = self.last_sirq_split[key]
            hz = lambda n, l : '%0.fHz' % ((n - l) / tdiff)
            n = len(now)
            snow, slast = sum(now), sum(last)
            anow, alast = snow / n, slast / n
            each = ''
            if self.show_all:
                each = '%s : ' % ' '.join(hz(n, l) for n, l in zip(now, last))
            else:
                each = ''
            cpu = '%s: %s%s(%s)' % (label, each, hz(snow, slast), hz(anow, alast))
        return cpu
    
    def function(self):
        now = time.monotonic()
        cpu = CPU()
        self.now_sirq_split = SoftIRQs()
        tdiff = now - self.last_time
        self.last_time = now
        display = self.show_function
        self.now_cpu_stat   = cpu.cpu
        self.now_cpu_total  = sum(cpu.cpu)
        self.now_cpus_total = [sum(c) for c in cpu.cpus]
        self.now_cpus_stat  = [[c[s] for c in cpu.cpus] for s in range(len(cpu.cpu))]
        for i in range(len(self.functions)):
            if i == display:
                ret = self.functions[i](cpu, True, tdiff)
            else:
                self.functions[i](cpu, False, tdiff)
        self.last_cpus_stat  = self.now_cpus_stat
        self.last_cpu_stat   = self.now_cpu_stat
        self.last_cpus_total = self.now_cpus_total
        self.last_cpu_total  = self.now_cpu_total
        self.last_sirq_split = self.now_sirq_split
        return ret


class MyMemory(Entry):
    def __init__(self, *args, **kwargs):
        self.coloured = tuple(self.colourise(i) for i in range(101))
        self.show_labels = False
        self.show_value = -1
        self.show_default = False
        self.show_swaps = False
        self.show_swap = 0
        self.labels = list(sorted(Memory().keys))
        swaps = Swaps()
        self.prio = swaps.header_map['Priority']
        self.used = swaps.header_map['Used']
        self.size = swaps.header_map['Size']
        self.swap = swaps.header_map['Filename']
        Entry.__init__(self, *args, **kwargs)
    
    def action(self, col, button, x, y):
        if button == LEFT_BUTTON:
            if self.show_value >= 0:
                self.show_default = not self.show_default
                self.invalidate()
        elif button == MIDDLE_BUTTON:
            self.show_labels = not self.show_labels
            self.invalidate()
        elif button == RIGHT_BUTTON:
            self.show_swaps = not self.show_swaps
            self.invalidate()
        elif button == SCROLL_UP:
            if self.show_swaps:
                self.show_swap += 1
                self.invalidate()
            else:
                n = self.show_value + 1
                if n < len(self.labels):
                    self.show_value = n
                    self.invalidate()
        elif button == SCROLL_DOWN:
            if self.show_swaps:
                n = self.show_swap
                if n > 0:
                    self.show_swap = n - 1
                    self.invalidate()
            else:
                self.show_value -= 1
                if self.show_value < -1:
                    self.show_value = -1
                    self.invalidate()
    
    def u(self, value):
        units = 'KMGTPE'
        unit = 0
        while unit + 1 < len(units) and value >= 1024:
            unit += 1
            value /= 1024
        return '%.1f%s' % (value, units[unit])
    
    def colourise(self, value):
        if value >= 100:
            return '\033[31m100\033[0m'
        colour = '39'
        if value > 30:  colour = '32'
        if value > 50:  colour = '33'
        if value > 80:  colour = '31'
        return '\033[%sm%i\033[0m%%' % (colour, value)
    
    def function(self):
        if self.show_swaps:
            swaps = Swaps()
            while True:
                if len(swaps.swaps) == 0:
                    return 'no swaps available'
                try:
                    swap = swaps.swaps[self.show_swap]
                    used, size = int(swap[self.used]), int(swap[self.size])
                    swap, prio = swap[self.swap], int(swap[self.prio])
                    return '%s: %s (%sB/%sB, prio %i)' % (swap, self.colourise(used * 100 / size),
                                                          self.u(used), self.u(size), prio)
                except:
                    self.show_swap -= 1
                    if self.show_swap < 0:
                        self.show_swaps = False
                        return self.function()
        else:
            memory = Memory()
            if not self.show_default and self.show_value > 0:
                label = self.labels[self.show_value]
                try:
                    value = memory[label]
                    unit = 0
                    units = ['K', 'M', 'G', 'T', 'P', 'E']
                    while (unit + 1 < len(units)) and (value >= 1024):
                        value /= 1024
                        unit += 1
                    return '%s: %.1f%sB' % (label, value, units[unit])
                except:
                    self.show_value = -1
            if memory.mem_total == 0:
                mem = '---'
                shm = '---'
            else:
                mem = self.coloured[limited(memory.mem_used * 100 / memory.mem_total)]
                shm = self.coloured[limited(memory.shmem * 100 / memory.mem_total)]
            if memory.swap_total == 0:
                swp = 'n/a'
            else:
                swp = self.coloured[limited(memory.swap_used * 100 / memory.swap_total)]
            if self.show_labels:
                mem = 'Mem: %s%sSwp: %s%sShm: %s' % (mem, SEPARATOR, swp, SEPARATOR, shm)
            else:
                mem = 'Mem: %s %s %s' % (mem, swp, shm)
            return mem


class MyStat(Entry):
    def __init__(self, *args, **kwargs):
        self.keys_4 = SNMP().keys
        self.keys_6 = SNMP6().keys
        self.keys_vm = VMStat().keys
        self.show_group = 0
        self.show_value_4 = 0
        self.show_value_6 = 0
        self.show_value_vm = 0
        Entry.__init__(self, *args, **kwargs)
    
    def action(self, col, button, x, y):
        if button == LEFT_BUTTON:
            n = self.show_group + 1
            if n < 4:
                self.show_group = n
                self.invalidate()
        elif button == MIDDLE_BUTTON:
            self.invalidate()
        elif button == RIGHT_BUTTON:
            n = self.show_group
            if n > 0:
                self.show_group = n - 1
                self.invalidate()
        elif button == SCROLL_UP:
            if self.show_group == 0:
                n = self.show_value_4
                if n + 1 < len(self.keys_4):
                    self.show_value_4 = n + 1
                    self.invalidate()
            elif self.show_group == 1:
                n = self.show_value_6
                if n + 1 < len(self.keys_6):
                    self.show_value_6 = n + 1
                    self.invalidate()
            elif self.show_group == 2:
                n = self.show_value_vm
                if n + 1 < len(self.keys_vm):
                    self.show_value_vm = n + 1
                    self.invalidate()
            elif self.show_group == 3:
                pass
        elif button == SCROLL_DOWN:
            if self.show_group == 0:
                n = self.show_value_4
                if n > 0:
                    self.show_value_4 = n - 1
                    self.invalidate()
            elif self.show_group == 1:
                n = self.show_value_6
                if n > 0:
                    self.show_value_6 = n - 1
                    self.invalidate()
            elif self.show_group == 2:
                n = self.show_value_vm
                if n > 0:
                    self.show_value_vm = n - 1
                    self.invalidate()
            elif self.show_group == 3:
                pass
    
    def function(self):
        try:
            if self.show_group == 0:
                label = self.keys_4[self.show_value_4]
                value = SNMP()[label]
            elif self.show_group == 1:
                label = self.keys_6[self.show_value_6]
                value = SNMP6()[label]
            elif self.show_group == 2:
                label = self.keys_vm[self.show_value_vm]
                value = VMStat()[label]
                label = ''.join(w[:1].upper() + w[1:] for w in label.split('_'))
            elif self.show_group == 3:
                uptime = Uptime()
                avg = uptime.uptime_seconds - uptime.average_idle_seconds
                wrk = (avg) * 100 / uptime.uptime_seconds
                up  = '%id%i:%02i' % uptime.uptime[:3]
                avg = '%id%i:%02i' % Uptime.split_time(avg)[:3]
                return 'Uptime: %.0f%% %s / %s' % (wrk, avg, up)
            return '%s: %i' % (label, value)
        except Exception as e:
            return str(e)


class MyNetwork(Entry):
    def __init__(self, *args, limits = None, ignore = None, pings = None, **kwargs):
        self.limits = { 'rx_bytes' : None # Download speed in bytes (not bits)
                      , 'tx_bytes' : None # Upload speed in bytes (not bits)
                      , 'rx_total' : None # Download cap in bytes
                      , 'tx_total' : None # Upload cap in bytes
                      }
        if limits is not None:
            self.limits = limits
        if pings is None:
            pings = ['gateway']
        elif isinstance(pings, str) or isinstance(pings, Ping):
            pings = [pings]
        pings = [(Ping(targets = Ping.get_nics(p)) if isinstance(p, str) else p).monitors for p in pings]
        self.pings = {}
        for ping in pings:
            for nic in ping.keys():
                if nic not in self.pings:
                    self.pings[nic] = ping[nic]
                else:
                    self.pings[nic] += ping[nic]
        self.ignore = ['lo'] if ignore is None else ignore
        self.net_time = time.monotonic()
        self.net_last = {}
        self.show_all = False
        self.show_name = False
        self.show_value = 0
        self.labels = ['bytes', 'total', 'packets', 'errs',
                       'drop', 'fifo', 'frame', 'colls',
                       'carrier', 'compressed', 'multicast']
        self.in_bytes = False # in bits if showing total
        Entry.__init__(self, *args, **kwargs)
    
    def action(self, col, button, x, y):
        if button == LEFT_BUTTON:
            self.show_all = not self.show_all
        elif button == MIDDLE_BUTTON:
            self.show_name = not self.show_name
        elif button == RIGHT_BUTTON:
            self.in_bytes = not self.in_bytes
        elif button == SCROLL_UP:
            n = self.show_value + 1
            if n >= len(self.labels):
                return
            self.show_value = n
        elif button == SCROLL_DOWN:
            n = self.show_value - 1
            if self.show_value < 0:
                return
            self.show_value = n
        else:
            return
        self.invalidate()
    
    def colourise(self, value, percent):
        colour = '39'
        if percent > 25:  colour = '32'
        if percent > 50:  colour = '33'
        if percent > 90:  colour = '31'
        return '\033[%sm%3.0f\033[0m' % (colour, value)
    
    def KBps(self, network, device, direction, net_tdiff):
        direction += '_bytes'
        value = network[device][direction]
        limit = None
        if direction in self.limits:
            limit = self.limits[direction]
        if limit is None:
            limit = 12500000 # 100 mbps
        if device in self.net_last:
            value -= self.net_last[device][direction]
        else:
            value = 0
        percent = value * 100 / (limit * net_tdiff)
        value /= 1024 * net_tdiff
        return self.colourise(value, percent)
    
    def kbps(self, network, device, direction, net_tdiff):
        direction += '_bytes'
        value = network[device][direction]
        limit = None
        if direction in self.limits:
            limit = self.limits[direction]
        if limit is None:
            limit = 12500000 # 100 mbps
        if device in self.net_last:
            value -= self.net_last[device][direction]
        else:
            value = 0
        percent = value * 100 / (limit * net_tdiff)
        value /= 128 * net_tdiff
        return self.colourise(value, percent)
    
    def total(self, network, device, direction, bits):
        direction += '_bytes'
        value = network[device][direction]
        limit = self.limits[direction] if direction in self.limits else None
        if limit is not None:
            percent = value * 100 / limit
            colour = '32'
            if percent >=  25:  colour = '39'
            if percent >=  50:  colour = '33'
            if percent >=  75:  colour = '31'
            if percent >=  95:  colour = '7;33'
            if percent >= 100:  colour = '7;31'
        else:
            colour = '39'
        if bits:
            value *= 8
        unit = 0
        if bits:
            units = ['', 'k', 'm', 'g', 't', 'p', 'e']
        else:
            units = ['', 'K', 'M', 'G', 'T', 'P', 'E']
        while (unit + 1 < len(units)) and (value >= 1024):
            value /= 1024
            unit += 1
        return '\033[%sm%.1f\033[0m%s' % (colour, value, units[unit])
    
    def ping(self, monitor):
        monitor.semaphore.acquire()
        try:
            latency = monitor.get_latency(True)[1]
            droptime = monitor.dropped_time(True)
            if droptime:
                return ' \033[31m%4is\033[00m' % droptime
            elif latency is None:
                return ' \033[31mdrop?\033[00m'
            colour = '31'
            if   latency <  5:  colour = '32'
            elif latency < 10:  colour = '39'
            elif latency < 20:  colour = '33'
            return ' \033[%sm%5.2f\033[00m' % (colour, latency)
        finally:
            monitor.semaphore.release()
    
    def function(self):
        net_now = time.monotonic()
        net_tdiff, self.net_time = net_now - self.net_time, net_now
        network = Network(*self.ignore).devices
        label = self.labels[self.show_value]
        show_total = label == 'total'
        show_bytes = label == 'bytes'
        xlabel = 'bytes' if show_total else label
        suffix = ''
        if show_total and self.in_bytes:
            f = lambda dev, dir : self.total(network, dev, dir, True) + 'b'
        elif show_total:
            f = lambda dev, dir : self.total(network, dev, dir, False) + 'B'
        elif show_bytes and self.in_bytes:
            f = lambda dev, dir : self.KBps(network, dev, dir, net_tdiff) + 'KB/s'
        elif show_bytes:
            f = lambda dev, dir : self.kbps(network, dev, dir, net_tdiff) + 'kbps'
        else:
            f = lambda dev, dir : '%i' % network[dev][dir + '_' + label]
            suffix = ' ' + label
        def create(lbl, dev):
            ret = ''
            if lbl is not None:
                ret += lbl + ': '
            have_down = ('rx_' + xlabel) in network[dev]
            have_up   = ('tx_' + xlabel) in network[dev]
            if have_down:
                ret += f(dev, 'rx') + '↓'
                if have_up:
                    ret += ' '
            if have_up:
                ret += f(dev, 'tx') + '↑'
            ret += suffix
            if show_bytes or show_total:
                if dev == '*':
                    for dev in self.pings.keys():
                        for ping in self.pings[dev]:
                            ret += self.ping(ping)
                elif dev in self.pings:
                    for ping in self.pings[dev]:
                        ret += self.ping(ping)
            return ret
        if self.show_all:
            if self.show_name:
                net = [create(dev, dev) for dev in network]
            else:
                net = [create(None, dev) for dev in network]
            net = (SEPARATOR if self.show_name else ' ').join(net)
        else:
            devsum = {}
            for dev in network.keys():
                table = network[dev]
                for key in table.keys():
                    if key not in devsum:
                        devsum[key] = 0
                    devsum[key] += table[key]
            network['*'] = devsum
            if self.show_name:
                net = create('Net', '*')
            else:
                net = create(None, '*')
        self.net_last = network
        return net


class MyIO(Entry):
    def __init__(self, *args, fs_name_map = None, fs_ignore = None, fs_type_ignore = None, **kwargs):
        self.fs_name_map = [] if fs_name_map is None else fs_name_map
        self.fs_ignore = set([] if fs_ignore is None else fs_ignore)
        self.fs_type_ignore = set(MyIO.nodev_fs() if fs_type_ignore is None else fs_type_ignore)
        self.show_value = 0
        self.show_disc_value = 0
        self.show_overall = True
        self.show_disc = 0
        self.disc_map = None
        Entry.__init__(self, *args, **kwargs)
    
    @staticmethod
    def nodev_fs():
        ret = []
        with open('/proc/filesystems', 'rb') as file:
            data = file.read()
        data = data.decode('utf-8', 'strict')[:-1].replace('\t', ' ').split('\n')
        for line in data:
            cols = line.split(' ')
            if 'nodev' in cols[:-1]:
                ret.append(cols[-1])
        ret += ['fuse.gvfsd-fuse']
        return ret
    
    def action(self, col, button, x, y):
        if button == LEFT_BUTTON:
            overall = self.show_overall
            disc_map = self.disc_map
            if overall and disc_map is not None:
                x = 0
                for text, disc in disc_map:
                    if col < x:
                        break
                    w = Bar.coloured_length(text)
                    if col < x + w:
                        if disc is not None:
                            self.show_disc = disc
                        break
                    x += w + 1
            self.show_overall = not overall
        elif button == MIDDLE_BUTTON and not self.show_overall:
            self.show_disc_value = max(self.show_disc_value - 1, 0)
        elif button == RIGHT_BUTTON and not self.show_overall:
            self.show_disc_value = min(self.show_disc_value + 1, 4)
        elif button == SCROLL_UP:
            if self.show_overall:
                self.show_value = min(self.show_value + 1, 13)
            else:
                show_disc = self.show_disc
                if isinstance(show_disc, str):
                    try:
                        show_disc = [d.filesystem for d in self.get_discs()].index(show_disc)
                    except:
                        show_disc = -1
                self.show_disc = show_disc + 1
        elif button == SCROLL_DOWN:
            if self.show_overall:
                self.show_value = max(self.show_value - 1, 0)
            else:
                show_disc = self.show_disc
                if isinstance(show_disc, str):
                    try:
                        show_disc = [d.filesystem for d in self.get_discs()].index(show_disc)
                    except:
                        show_disc = -1
                self.show_disc = max(show_disc - 1, 0)
        else:
            return
        self.invalidate()
    
    def colour(self, percent):
        colour = '39'
        if percent < 25:  colour = '32'
        if percent > 50:  colour = '33'
        if percent > 90:  colour = '31'
        if percent > 95:  colour = '39;41'
        return colour
    
    def unit(self, value):
        units = ['', 'K', 'M', 'G', 'T', 'P', 'E']
        unit = 0
        while unit + 1 < len(units) and value >= 1024:
            unit += 1
            value /= 1024
        return (value, units[unit])
    
    def si(self, value, baseunit = 0):
        unit = baseunit + 3
        units = ['n', 'µ', 'm', '', 'k', 'M', 'G', 'T', 'P', 'E']
        while unit + 1 < len(units) and value >= 1000:
            unit += 1
            value /= 1000
        return (value, units[unit])
    
    def get_discs(self):
        discs = Discs()
        fs = [discs.filesystems[f] for f in sorted(discs.filesystems.keys()) if
              f not in self.fs_ignore and
              discs.filesystems[f].fstype not in self.fs_type_ignore and
              f[0] == '/']
        return fs
    
    def function_overall(self):
        df = []
        if self.show_value == 0:
            label = 'Df'
            self.disc_map = [(label + ':', None)]
            used = 0
            available = 0
            for disc in self.get_discs():
                percent = disc.used * 100 / (disc.used + disc.available)
                text = '\033[%sm%.0f\033[0m%%' % (self.colour(percent), percent)
                df.append(text)
                self.disc_map.append((text, disc.filesystem))
                used += disc.used
                available += disc.available
            df.append(':')
            percent = used * 100 / (used + available)
            df.append('\033[%sm%.0f\033[0m%%' % (self.colour(percent), percent))
            
        elif self.show_value == 1:
            label = 'Df'
            self.disc_map = [(label + ':', None)]
            used = 0
            available = 0
            for disc in self.get_discs():
                percent = disc.used * 100 / (disc.used + disc.available)
                text = '\033[%sm%.1f\033[0m%s' % (self.colour(percent), *self.unit(disc.available))
                df.append(text)
                self.disc_map.append((text, disc.filesystem))
                used += disc.used
                available += disc.available
            df.append(':')
            percent = used * 100 / (used + available)
            df.append('\033[%sm%.1f\033[0m%s' % (self.colour(percent), *self.unit(available)))
            
        elif self.show_value == 2:
            label = 'Df(inodes)'
            self.disc_map = [(label + ':', None)]
            used = 0
            available = 0
            for disc in self.get_discs():
                percent = disc.iused * 100 / (disc.iused + disc.ifree)
                text = '\033[%sm%.0f\033[0m%%' % (self.colour(percent), percent)
                df.append(text)
                self.disc_map.append((text, disc.filesystem))
                used += disc.iused
                available += disc.ifree
            df.append(':')
            percent = used * 100 / (used + available)
            df.append('\033[%sm%.0f\033[0m%%' % (self.colour(percent), percent))
            
        elif self.show_value == 3:
            label = 'Dent'
            dentry = DentryState()
            percent = (dentry.nr_dentry - dentry.nr_unused) * 100 / dentry.nr_dentry
            df.append('\033[%sm%.0f\033[0m%%' % (self.colour(percent), percent))
            df.append('%is' % dentry.age_limit)
            df.append('%ipages' % dentry.want_pages)
            
        elif self.show_value == 4:
            label = 'Inode'
            inode = InodeState()
            percent = (inode.nr_inodes - inode.nr_free_inodes) * 100 / inode.nr_inodes
            df.append('\033[%sm%.0f\033[0m%%%s' % (self.colour(percent), percent,
                                                   '' if inode.preshrink == 0 else ' preshrink'))
        elif self.show_value == 5:
            label = 'File'
            files = Files()
            percent = (files.nr_files - files.nr_free_files) * 100 / files.file_max
            df.append('\033[%sm%.0f\033[0m%%' % (self.colour(percent), percent))
            df.append('%i/%i/%i' % (files.nr_files - files.nr_free_files, files.nr_files, files.file_max))
            
        elif self.show_value == 6:
            label = 'Lock'
            locks = Locks().locks
            ar, aw, mr, mw = 0, 0, 0, 0
            for lock in locks:
                if lock.mandatory:
                    if lock.shared:
                        mr += 1
                    else:
                        mw += 1
                else:
                    if lock.shared:
                        ar += 1
                    else:
                        aw += 1
            df.append('%iar' % ar)
            df.append('%iaw' % aw)
            df.append('%imr' % mr)
            df.append('%imw' % mw)
            df.append(':')
            df.append('%ia' % (ar + aw))
            df.append('%im' % (mr + mw))
            df.append('%ir' % (ar + mr))
            df.append('%iw' % (aw + mw))
            df.append(':')
            df.append('%i' % (ar + aw + mr + mw))
            
        elif self.show_value == 7:
            label = 'Rand'
            random = Random()
            df.append(str(random.poolsize))
            
        elif self.show_value in (8, 11):
            label = 'Disc(r %s)' % ('sum' if self.show_value == 8 else 'avg')
            stats = DiscStats().devices.values()
            r_complete, r_merge, r_sectors, r_time = 0, 0, 0, 0
            for stat in stats:
                r_complete += stat.r_complete
                r_merge    += stat.r_merge
                r_sectors  += stat.r_sectors
                r_time     += stat.r_time
            n = 1 if self.show_value == 8 else len(stats)
            r_complete /= n
            r_merge    /= n
            r_sectors  /= n
            r_time     /= n
            df.append('%.1f%scompleted' % self.si(r_complete))
            df.append('%.1f%smerge'     % self.si(r_merge))
            df.append('%.1f%ssectors'   % self.si(r_sectors))
            df.append('%.1f%ss'         % self.si(r_time, -1))
            
        elif self.show_value in (9, 12):
            label = 'Disc(w %s)' % ('sum' if self.show_value == 9 else 'avg')
            stats = DiscStats().devices.values()
            w_complete, w_merge, w_sectors, w_time = 0, 0, 0, 0
            for stat in stats:
                w_complete += stat.w_complete
                w_merge    += stat.w_merge
                w_sectors  += stat.w_sectors
                w_time     += stat.w_time
            n = 1 if self.show_value == 9 else len(stats)
            w_complete /= n
            w_merge    /= n
            w_sectors  /= n
            w_time     /= n
            df.append('%.1f%scomplete' % self.si(w_complete))
            df.append('%.1f%smerge'    % self.si(w_merge))
            df.append('%.1f%ssectors'  % self.si(w_sectors))
            df.append('%.1f%ss'        % self.si(w_time, -1))
            
        elif self.show_value in (10, 13):
            label = 'Disc(io %s)' % ('sum' if self.show_value == 10 else 'avg')
            stats = DiscStats().devices.values()
            io_current, io_time, io_weighted_time  = 0, 0, 0
            for stat in stats:
                io_current += stat.io_current
                io_time    += stat.io_time
                io_weighted_time += stat.io_weighted_time
            n = 1 if self.show_value == 10 else len(stats)
            io_current /= n
            io_time    /= n
            io_weighted_time /= n
            df.append('%.1f%s'            % self.si(io_current))
            df.append('%.1f%ss'           % self.si(io_time, -1))
            df.append('%.1f%ss(weighted)' % self.si(io_weighted_time, -1))
        
        return '%s: %s' % (label, ' '.join(df))
    
    def function_disc(self):
        discs = self.get_discs()
        disc = self.show_disc
        if isinstance(disc, str):
            for i, d in enumerate(discs):
                if d.filesystem == disc:
                    disc = i
                    break
            if isinstance(disc, str):
                disc = 0
        elif disc >= len(discs):
            disc = len(discs) - 1
        disc = discs[disc]
        name = disc.filesystem
        name = self.fs_name_map[name] if name in self.fs_name_map else name.split('/')[-1]
        df = []
        
        if self.show_disc_value > 1:
            try:
                devices = DiscStats().devices
                device = None
                fs = os.path.realpath(disc.filesystem)
                stat = None
                for dev in devices.keys():
                    if '/dev/' + dev == fs:
                        stat = devices[dev]
                        break
                if stat is None:
                    self.show_disc_value = 0
            except:
                self.show_disc_value = 0
        
        if self.show_disc_value == 0:
            percent = disc.used * 100 / (disc.used + disc.available)
            text = '\033[%sm%.0f\033[0m%%(%.1f%sB/%.f%sB)' % (self.colour(percent), percent,
                                                              *self.unit(disc.available),
                                                              *self.unit(disc.used + disc.available))
            df.append(text)
            percent = disc.iused * 100 / (disc.iused + disc.ifree)
            text = '\033[%sm%.0f\033[0m%%(%.1f%s/%.1f%s)inodes' % (self.colour(percent), percent,
                                                                   *self.si(disc.iused), *self.si(disc.inodes))
            df.append(text)
            
        elif self.show_disc_value == 1:
            df.append(disc.fstype)
            df.append(disc.mountpoint)
            
        elif self.show_disc_value == 2:
            name += '(r)'
            df.append('%.1f%scompleted' % self.si(stat.r_complete))
            df.append('%.1f%smerge'     % self.si(stat.r_merge))
            df.append('%.1f%ssectors'   % self.si(stat.r_sectors))
            df.append('%.1f%ss'         % self.si(stat.r_time, -1))
            
        elif self.show_disc_value == 3:
            name += '(w)'
            df.append('%.1f%scomplete' % self.si(stat.w_complete))
            df.append('%.1f%smerge'    % self.si(stat.w_merge))
            df.append('%.1f%ssectors'  % self.si(stat.w_sectors))
            df.append('%.1f%ss'        % self.si(stat.w_time, -1))
            
        elif self.show_disc_value == 4:
            name += '(io)'
            df.append('%.1f%s'            % self.si(stat.io_current))
            df.append('%.1f%ss'           % self.si(stat.io_time, -1))
            df.append('%.1f%ss(weighted)' % self.si(stat.io_weighted_time, -1))
        
        return '%s: %s' % (name, ' '.join(df))
    
    def function(self):
        try:
            self.disc_map = None
            if self.show_overall:
                return self.function_overall()
            else:
                return self.function_disc()
        except Exception as e:
            return str(e)


class MyTop(Entry):
    def __init__(self, *args, **kwargs):
        self.show_pid = False
        self.show_cpu = True
        self.show_label = True
        self.show_nic = None
        self.top_cmd = pdeath('HUP', 'top', '-b', '-n', '1', '-o', '%CPU', '-w', '10000')
        self.refresh()
        Entry.__init__(self, *args, **kwargs)
        xasync(lambda : watch(5, t(self.refresh)), name = 'top')
    
    def action(self, col, button, x, y):
        if button == LEFT_BUTTON:
            self.show_pid = not self.show_pid
        elif button == MIDDLE_BUTTON:
            self.show_label = not self.show_label
        elif button == RIGHT_BUTTON:
            self.show_cpu = not self.show_cpu
        else:
            return
        self.refresh()
        self.invalidate()
    
    def refresh(self):
        top = spawn_read(*self.top_cmd).split('\n')
        top = [line for line in top if not line.startswith('%')][6]
        top = [col for col in top.replace('\t', ' ').split(' ') if not col == '']
        text = 'Top: ' if self.show_label else ''
        if self.show_pid:
            text += top[0] + ' '
        if self.show_cpu:
            text += top[6] + ' '
        text += ' '.join(top[10:])
        self.text = text
    
    def function(self):
        return self.text


class MyMOC(Entry):
    def __init__(self, *args, ignore = None, **kwargs):
        self.show_state = False
        self.display = 0
        self.function_display = Sometimes(self.function_display_, 4)
        Entry.__init__(self, *args, **kwargs)
    
    def invalidate(self):
        self.function_display.counter = 0
        Entry.invalidate(self)
    
    def action(self, col, button, x, y):
        if button == RIGHT_BUTTON:
            self.show_state = not self.show_state
            self.invalidate()
        elif self.show_state:
            if button == LEFT_BUTTON:
               self.invalidate()
            elif button == SCROLL_UP:
               n = self.display + 1
               if n >= 6:
                   return
               self.display = n
               self.invalidate()
            elif button == SCROLL_DOWN:
               n = self.display - 1
               if n < 0:
                   return
               self.display = n
               self.invalidate()
        else:
            moc = MOC()
            if moc.state == MOC.NOT_RUNNING:
                return
            elif button == LEFT_BUTTON:
                if col < 5:
                    return
                col -= 5
                if col % 3 == 2:
                    return
                col //= 3
                if   col == 0:           xasync(lambda : moc.play().wait())
                elif col == 1:           xasync(lambda : moc.toggle_pause().wait())
                elif col == 2:           xasync(lambda : moc.stop().wait())
                elif col == 3:           xasync(lambda : moc.previous().wait())
                elif col == 4:           xasync(lambda : moc.next().wait())
            elif button == SCROLL_UP:    xasync(lambda : moc.seek(+5).wait())
            elif button == SCROLL_DOWN:  xasync(lambda : moc.seek(-5).wait())
    
    def function_display_(self):
        moc = MOC()
        display = self.display
        if display == 0 or moc.state in (MOC.NOT_RUNNING, MOC.STOPPED):
            return 'Moc: %s' % { MOC.NOT_RUNNING : 'not running'
                               , MOC.STOPPED     : 'stopped'
                               , MOC.PAUSED      : 'paused'
                               , MOC.PLAYING     : 'playing'}[moc.state]
        key = ['SongTitle', 'Album', 'Artist', 'Title', 'File'][display -  1]
        label = key.lower() if display != 1 else 'song'
        return 'Moc(%s): %s' % (label, moc[key])
    
    def function(self):
        if not self.show_state:
            return 'Moc: |> || [] |< >|'
        return self.function_display()


class MyIPAddress(Entry):
    def __init__(self, *args, ignore = None, **kwargs):
        self.ignore = ['lo'] if ignore is None else ignore
        self.text = None
        self.show_public = True
        self.show_nic = None
        Entry.__init__(self, *args, **kwargs)
        def init():
            self.refresh()
            xasync(lambda : Clock(sync_to = 10 * Clock.MINUTES).continuous_sync(t(self.refresh)), name = 'ipaddress')
        xasync(init, name = 'ipaddress')
    
    def action(self, col, button, x, y):
        if button == LEFT_BUTTON:
            self.show_public = not self.show_public
            self.invalidate()
        elif button == RIGHT_BUTTON:
            xasync(self.refresh, name = 'ipaddress')
        elif button in (SCROLL_UP, SCROLL_DOWN):
            nic = self.show_nic
            if nic is None:
                return
            nics = list(sorted(self.text[0].keys()))
            try:
                nic = nics.index(nic)
            except:
                if len(nics) == 0:
                    self.show_nic = None
                    self.invalidate()
                else:
                    self.show_nic = nics[0]
                    self.invalidate()
            nic += +1 if button == SCROLL_UP else -1
            if 0 <= nic < len(nics):
                self.show_nic = nics[nic]
                self.invalidate()
    
    def refresh(self):
        text_private, text_public = {}, {}
        ipa = IPAddress(*(self.ignore))
        for nic in ipa.nics.keys():
            (state, a4, a6, a) = ipa.nics[nic]
            if state == IPAddress.DOWN:
                label = '31'
            elif state == IPAddress.UP:
                label = '32'
            elif state == IPAddress.UNKNOWN:
                label = '33'
            else:
                label = '39'
            label = '\033[%sm%s\033[0m' % (label, nic)
            pub = label + ':'
            prv = pub
            if a4 is not None:
                prv += ' ' + a4
            if a6 is not None:
                prv += ' ' + a6
            elif a4 is None:
                prv += ' no address'
            pub += ' ' + a if a is not None else ' no address'
            text_private[nic] = prv
            text_public[nic] = pub
        self.text = (text_private, text_public)
        self.invalidate()
    
    def function(self):
        text = self.text
        if text is None:
            return '...'
        text = text[1 if self.show_public else 0]
        nic = self.show_nic
        if nic is None or nic not in text:
            if len(text.keys()) == 0:
                self.show_nic = None
                return 'No NIC available'
            nic = sorted(text.keys())[0]
            self.show_nic = nic
        return text[nic]


class MyLeapsec(Entry):
    def __init__(self, *args, **kwargs):
        self.announcement = None
        Entry.__init__(self, *args, **kwargs)
        def init():
            self.refresh()
            xasync(lambda : Clock(sync_to = Clock.MINUTES).continuous_sync(Sometimes(t(self.refresh), 12 * 60)), name = 'leapsec')
        xasync(init, name = 'leapsec')
    
    def action(self, col, button, x, y):
        if button == RIGHT_BUTTON:
            self.refresh()
    
    def refresh(self):
        leapanon = LeapSeconds()
        found = -1
        now = time.time()
        for index in range(len(leapanon)):
            if leapanon[index][3] >= now:
                found = index
                break
        announcement = leapanon[found]
        text = ('+%i' if announcement[4] > 0 else '%i') % announcement[4]
        text += 's ' + ('\033[%sm%s\033[00m ago' if found < 0 else 'in \033[%sm%s\033[00m')
        text += ' end of UTC %i-%02i-%0i' % announcement[:3]
        if announcement[5] == LeapSeconds.SECONDARY:
            text += ' (secondary)'
        elif announcement[5] == LeapSeconds.OUT_OF_BAND:
            text += ' (out of band)'
        self.announcement = (text, announcement[3])
        self.invalidate()
    
    def dur(self, t):
        s, t = t % 60, t // 60
        m, t = t % 60, t // 60
        h, d = t % 24, t // 24
        if d > 0:
            return '%id%ih%i\'%02i"' % (d, h, m, s)
        elif h > 0:
            return '%ih%i\'%02i"' % (h, m, s)
        elif m > 0:
            return '%i\'%02i"' % (m, s)
        else:
            return '%02is' % s
    
    def colour(self, time_until):
        c = '00'
        if time_until >= 0:
            if time_until < 10:
                c = '41'
            elif time_until < 60:
                c = '31'
            elif time_until < 60 * 60:
                c = '33'
            elif time_until < 24 * 60 * 60:
                c = '32'
        return c
    
    def function(self):
        if self.announcement is None:
            return '...'
        (text, when) = self.announcement
        time_until = when - int(time.time())
        return text % (self.colour(time_until), self.dur(abs(time_until)))


class MyTimer(Entry):
    def __init__(self, *args, **kwargs):
        self.start = None
        self.length = None
        self.notified = False
        self.pause_text = None
        mqueue_map['timer'] = self.mqueue
        Entry.__init__(self, *args, **kwargs)
    
    def mqueue(self, args):
        if args[1] == 'stop':
            self.stop()
        elif args[1] in ('pause', 'resume'):
            self.pause()
        else:
            duration = args[1].split(':')
            duration.reverse()
            seconds = 0
            if len(duration) > 0:  seconds += int(duration[0])
            if len(duration) > 1:  seconds += int(duration[1]) * 60
            if len(duration) > 2:  seconds += int(duration[2]) * 60 * 60
            if len(duration) > 3:  seconds += int(duration[3]) * 60 * 60 * 24
            self.start = time.time()
            self.length = seconds
            self.notified = False
            self.pause_text = None
            self.invalidate()
    
    def action(self, col, button, x, y):
        if button == LEFT_BUTTON:
            self.pause()
        elif button == RIGHT_BUTTON:
            self.stop()
    
    def pause(self):
        if self.pause_text is not None:
            self.start = time.time()
            self.pause_text = None
        elif self.length - int(time.time() - self.start) < 0:
            self.start, self.length, self.notified, self.pause_text = None, None, False, None
        else:
            self.pause_text = ''
            self.length -= int(time.time() - self.start)
            self.pause_text = self.dur(self.length)
        self.invalidate()
    
    def stop(self):
        self.start = None
        self.length = None
        self.notified = False
        self.pause_text = None
        self.invalidate()
    
    def dur(self, t):
        s, t = t % 60, t // 60
        m, t = t % 60, t // 60
        h, d = t % 24, t // 24
        if d > 0:
            return '%id %i:%02i:%02i' % (d, h, m, s)
        elif h > 0:
            return '%i:%02i:%02i' % (h, m, s)
        else:
            return '%i:%02i' % (m, s)
    
    def notify(self):
        subprocess.Popen(['notify-send', '-u', 'critical', 'You are done with your task']).wait()
    
    def wall(self):
        subprocess.Popen(['wall', 'You are done with your task']).wait()
    
    def function(self):
        if self.pause_text is not None:
            return '%s (paused)' % self.pause_text
        if self.start is None:
            return 'Timer inactive'
        countdown = self.length - int(time.time() - self.start)
        if countdown > 0:
            return self.dur(countdown)
        if not self.notified:
            self.notified = True
            xasync(self.notify, name = 'timer notify')
            xasync(self.wall, name = 'timer wall')
        countdown %= 2
        if countdown == 0:
            return '\033[37;41mYou are done\033[00m'
        else:
            return '\033[31mYou are done\033[00m'



def mqueue_wait():
    import posix_ipc
    qkey = '/.xpybar.' + os.environ['DISPLAY'].split('.')[0]
    q = posix_ipc.MessageQueue(qkey, posix_ipc.O_CREAT, 0o600, 8, 128)
    while True:
        try:
            message = q.receive(None)[0].decode('utf-8', 'replace').split(' ')
            if message[0] in mqueue_map:
                try:
                    mqueue_map[message[0]](message)
                except Exception as err:
                    print('%s: %s' % (sys.argv[0], str(err)), file = sys.stderr, flush = True)
            else:
                print('%s: unrecognised message: %s' % (sys.argv[0], ' '.join(message)), file = sys.stderr, flush = True)
        except:
            time.sleep(1)



mqueue_map = {}

myxmonad = MyXMonad(None)
myscroll = MyScroll(None)

functions = [ [ myscroll
              , myxmonad
              , None
              , MyTimer    (None)
              , MyNetwork  (lambda f : Clocked(f,  2))
              , MyMemory   (lambda f : Clocked(f,  2))
              , MyCPU      (lambda f : Clocked(f,  2))
              , MyBattery  (lambda f : Clocked(f, 10))
              , MyALSA     (None)
              , MyClock    (lambda f : Clocked(f,  1))
	      ]
            , [ myscroll
              , myxmonad
              , None
              , MyTop      (None)
              , MyIO       (lambda f : Clocked(f, 10))
              , MyStat     (lambda f : Clocked(f, 10))
              , MyNews     (None)
              , MyWeather  (None)
              , MyComputer (lambda f : Clocked(f, 20))
              ]
            , [ myscroll
              , myxmonad
              , None
              , MyIPAddress(lambda f : Clocked(f, 20))
              , MyLeapsec  (None)
              , MyMOC      (None)
              ]
            ]

HEIGHT = 0
groups = [Group(f) for f in functions]
groupi = 0
group = groups[groupi]
semaphore = threading.Semaphore()

def update_per_clock():
    if semaphore.acquire(blocking = False):
        try:
            for g in groups:
                for f in g.functions:
                    if isinstance(f.wrapped, Clocked):
                        f(True)
        finally:
            semaphore.release()
        invalidate()

start_ = start
def start():
    start_()
    bar.clear()
    get_display().flush()
    xasync(lambda : clock.continuous_sync(t(update_per_clock)), name = 'clock')
    xasync(mqueue_wait, name = 'mqueue')

def redraw():
    if semaphore.acquire(blocking = False):
        try:
            gr = groups[groupi]
            for g in groups:
                if g is not gr:
                    for f in g.functions:
                        f()
            values = gr.pattern % tuple(f() for f in gr.functions)
            bar.partial_clear(0, bar.width, 10, 0, 2, values)
            bar.draw_coloured_splitted_text(0, bar.width, 10, 0, 2, values)
        finally:
            semaphore.release()
        return True
    return False

def unhandled_event(e):
    global groups, groupi, group
    if isinstance(e, Xlib.protocol.event.ButtonPress):
        y = e.event_y
        x = e.event_x
        row = y // HEIGHT_PER_LINE
        lcol = x // bar.font_width
        rcol = (bar.width - x) // bar.font_width
        button = e.detail
        if button in (FORWARD_BUTTON, BACKWARD_BUTTON):
            groupi = (groupi + (+1 if button == BACKWARD_BUTTON else -1)) % len(groups)
            group = groups[groupi]
            invalidate()
        else:
            for f in group.posupdate:
                f.update_position()
            for f in group.functions:
                if f.click(row, lcol, rcol, button, x, y):
                    break