use strict;
 use warnings;
 
 our $VERSION = '1.4'; # b46fded611292cb
 our %IRSSI = (
     authors     => 'Nei',
     contact     => 'Nei @ anti@conference.jabber.teamidiot.de',
     url         => "http://anti.teamidiot.de/",
     name        => 'adv_windowlist',
     description => 'Adds a permanent advanced window list on the right or in a status bar.',
     license     => 'GNU GPLv2 or later',
    );
 
 # UPGRADE NOTE
 # ============
 # for users of 0.7 or earlier series, please note that appearance
 # settings have moved to /format, i.e. inside your theme!
 # the fifo (screen) has been replaced by an external viewer script
 
 # Usage
 # =====
 # copy the script to ~/.irssi/scripts/
 #
 # In irssi:
 #
 #		/run adv_windowlist
 #
 # In your shell (for example a tmux split):
 #
 #		perl ~/.irssi/scripts/adv_windowlist.pl
 #
 # To use sbar mode instead:
 #
 #		/toggle awl_viewer
 #
 # Hint: to get rid of the old [Act:] display
 #     /statusbar window remove act
 #
 # to get it back:
 #     /statusbar window add -after lag -priority 10 act
 
 # Options
 # =======
 # formats can be cleared with /format -delete
 #
 # /format awl_display_(no)key(_active|_visible) <string>
 # * string : Format String for one window. The following $'s are expanded:
 #     $C : Name
 #     $N : Number of the Window
 #     $Q : meta-Keymap
 #     $H : Start hilighting
 #     $S : Stop hilighting
 #         /+++++++++++++++++++++++++++++++++,
 #        | ****  I M P O R T A N T :  ****  |
 #        |                                  |
 #        | don't forget  to use  $S  if you |
 #        | used $H before!                  |
 #        |                                  |
 #        '+++++++++++++++++++++++++++++++++/
 #   key     : a key binding that goes to this window could be detected in /bind
 #   nokey   : no such key binding was detected
 #   active  : window would receive the input you are currently typing
 #   visible : window is also visible on screen but not active (a split window)
 #
 # /format awl_name_display <string>
 # * string : Format String for window names
 #     $0 : name as formatted by the settings
 #
 # /format awl_display_header <string>
 # * string : Format String for this header line. The following $'s are expanded:
 #     $C : network tag
 #
 # /format awl_separator(2) <string>
 # * string : Character to use between the channel entries
 # variant 2 can be used for alternating separators (only in status bar
 # without block display)
 #
 # /format awl_abbrev_chars <string>
 # * string : Character to use when shortening long names. The second character
 #   will be used if two blocks need to be filled.
 #
 # /format awl_title <string>
 # * string : Text to display in the title string or title bar
 #
 # /format awl_viewer_item_bg <string>
 # * string : Format String specifying the viewer's item background colour
 #
 # /set awl_prefer_name <ON|OFF>
 # * this setting decides whether awl will use the active_name (OFF) or the
 #   window name as the name/caption in awl_display_*.
 #   That way you can rename windows using /window name myownname.
 #
 # /set awl_hide_empty <num>
 # * if visible windows without items should be hidden from the window list
 # set it to 0 to show all windows
 #           1 to hide visible windows without items (negative exempt
 #           active window)
 #
 # /set awl_hide_data <num>
 # * num : hide the window if its data_level is below num
 # set it to 0 to basically disable this feature,
 #           1 if you don't want windows without activity to be shown
 #           2 to show only those windows with channel text or hilight
 #           3 to show only windows with hilight (negative exempt active window)
 #
 # /set awl_hide_name_data <num>
 # * num : hide the name of the window if its data_level is below num
 #   (only works in status bar without block display)
 # you will want to change your formats to add $H...$S around $Q or $N
 # if you plan to use this
 #
 # /set awl_maxlines <num>
 # * num : number of lines to use for the window list (0 to disable, negative
 #   lock)
 #
 # /set awl_maxcolumns <num>
 # * num : number of columns to use for the window list when using the
 #   tmux integration (0 to disable)
 #
 # /set awl_block <num>
 # * num : width of a column in viewer mode (negative values = block
 #   display in status bar mode)
 #         /+++++++++++++++++++++++++++++++++,
 #        | ******  W A R N I N G !  ******  |
 #        |                                  |
 #        | If  your  block  display  looks  |
 #        | DISTORTED,  you need to add the  |
 #        | following  line to your  .theme  |
 #        | file under                       |
 #        |     abstracts = {             :  |
 #        |                                  |
 #        |       sb_act_none = "%K$*";      |
 #        |                                  |
 #        '+++++++++++++++++++++++++++++++++/
 #
 # /set awl_sbar_maxlength <ON|OFF>
 # * if you enable the maxlength setting, the block width will be used as a
 #   maximum length for the non-block status bar mode too.
 #
 # /set awl_height_adjust <num>
 # * num : how many lines to leave empty in viewer mode
 #
 # /set awl_sort <-data_level|-last_line|refnum>
 # * you can change the window sort order with this variable
 #     -data_level : sort windows with hilight first
 #     -last_line  : sort windows in order of activity
 #     refnum      : sort windows by window number
 #     active/server/tag : sort by server name
 #   "-" reverses the sort order
 #   typechecks are supported via ::, e.g. active::Query or active::Irc::Query
 #   undefinedness can be checked with ~, e.g. ~active
 #   string comparison can be done with =, e.g. name=(status)
 #   to make sort case insensitive, use #i, e.g. name#i
 #   any key in the window hash can be tested, e.g. active/chat_type=XMPP
 #   multiple criteria can be separated with , or +, e.g. -data_level+-last_line
 #
 # /set awl_placement <top|bottom>
 # /set awl_position <num>
 # * these settings correspond to /statusbar because awl will create
 #   status bars for you
 # (see /help statusbar to learn more)
 #
 # /set awl_all_disable <ON|OFF>
 # * if you set awl_all_disable to ON, awl will also remove the
 #   last status bar it created if it is empty.
 #   As you might guess, this only makes sense with awl_hide_data > 0 ;)
 #
 # /set awl_viewer <ON|OFF>
 # * enable the external viewer script
 #
 # /set awl_viewer_launch <ON|OFF>
 # * try to auto-launch the viewer under tmux or with a shell command
 #   /awl restart is required all auto-launch related settings to take
 #   effect
 #
 # /set awl_viewer_tmux_position <left|top|right|bottom|custom>
 # * try to split in this direction when using tmux for the viewer
 #   custom : use custom_command setting
 #
 # /set awl_viewer_xwin_command <shell command>
 # * custom command to run in order to start the viewer when irssi is
 #   running under X
 #   %A  - gets replaced by the command to run the viewer
 #   %qA - additionally quote the command
 #
 # /set awl_viewer_custom_command <shell command>
 # * custom command to run in order to start the viewer
 #
 # /set awl_viewer_launch_env <string>
 # * specific environment settings for use on viewer auto-launch,
 #   without the AWL_ prefix
 #
 # /set awl_shared_sbar <left<right|OFF>
 # * share a status bar for the first awl item, you will need to manually
 #   /statusbar window add -after lag -priority 10 awl_shared
 #     left   : space in cells occupied on the left of status bar
 #     right  : space occupied on the right
 # Note: you need to replace "left" AND "right" with the appropriate numbers!
 #
 # /set awl_path <path>
 # * path to the file which the viewer script reads
 #
 # /set fancy_abbrev <no|head|strict|fancy>
 # * how to shorten too long names
 #     no     : shorten in the middle
 #     head   : always cut off the ends
 #     strict : shorten repeating substrings
 #     fancy  : combination of no+strict
 #
 # /set awl_custom_xform <perl code>
 # * specify a custom routine to transform window names
 #   example: s/^#// remove the #-mark of IRC channels
 #   the special flags $CHANNEL / $TAG / $QUERY / $NAME can be
 #   tested in conditionals
 #
 # /set awl_last_line_shade <timeout>
 # * set timeout to shade activity base colours, to enable
 #   you also need to add +-last_line to awl_sort
 #   (requires 256 colour support)
 #
 # /set awl_no_mode_hint <ON|OFF>
 # * whether to show the hint of running the viewer script in the
 #   status bar
 #
 # /set awl_mouse <ON|OFF>
 # * enable the terminal mouse in irssi
 # (use the awl-patched mouse.pl for gestures and commands if you need
 # them and disable mouse_escape)
 #
 # /set awl_mouse_offset <num>
 # * specifies where on the screen is the awl status bar
 #   (0 = on top/bottom, 1 = one additional line in between,
 #   e.g. prompt)
 #   you MUST set this correctly otherwise the mouse coordinates will
 #   be off
 #
 # /set mouse_scroll <num>
 # * how many lines the mouse wheel scrolls
 #
 # /set mouse_escape <num>
 # * seconds to disable the mouse, when not clicked on the windowlist
 #
 
 # Commands
 # ========
 # /awl redraw
 # * redraws the windowlist. There may be occasions where the
 #   windowlist can get destroyed so you can use this command to
 #   force a redraw.
 #
 # /awl restart
 # * restart the connection to the viewer script.
 
 # Viewer script
 # =============
 # When run from the command line, adv_windowlist acts as the viewer
 # script to be used together with the irssi script to display the
 # window list in a sidebar/terminal of its own.
 #
 # One optional parameter is accepted, the awl_path
 #
 # The viewer can be configured by three environment variables:
 #
 # AWL_HI9=1
 # * interpret %9 as high-intensity toggle instead of bold. This had
 #   been the default prior to version 0.9b8
 #
 # AWL_AUTOFOCUS=0
 # * disable auto-focus behaviour when activating a window
 #
 # AWL_NOTITLE=1
 # * disable the title bar
 
 # Nei =^.^= ( anti@conference.jabber.teamidiot.de )
 
 no warnings 'redefine';
 use constant IN_IRSSI => __PACKAGE__ ne 'main' || $ENV{IRSSI_MOCK};
 use constant SCRIPT_FILE => __FILE__;
 no if !IN_IRSSI, strict => (qw(subs refs));
 use if IN_IRSSI, Irssi => ();
 use if IN_IRSSI, 'Irssi::TextUI' => ();
 use v5.10;
 use Encode;
 use Storable ();
 use IO::Socket::UNIX;
 use List::Util qw(min max reduce);
 use Hash::Util qw(lock_keys);
 use Text::ParseWords qw(shellwords);
 
 BEGIN {
     if ($] < 5.012) {
 	*CORE::GLOBAL::length = *CORE::GLOBAL::length = sub (_) {
 	    defined $_[0] ? CORE::length($_[0]) : undef
 	};
 	*Irssi::active_win = {}; # hide incorrect warning
     }
 }
 
 unless (IN_IRSSI) {
     local *_ = \@ARGV;
     &AwlViewer::main;
     exit;
 }
 
 
 use constant GLOB_QUEUE_TIMER => 100;
 
 our $BLOCK_ALL;  # localized blocker
 my @actString;   # status bar texts
 my @win_items;
 my $currentLines = 0;
 my %awins;
 my $globTime;    # timer to limit remake calls
 
 my %CHANGED;
 my $VIEWER_MODE;
 my $MOUSE_ON;
 my %mouse_coords;
 my %statusbars;
 my %S; # settings
 my $settings_str = '';
 my $window_sort_func;
 my $custom_xform;
 my ($sb_base_width, $sb_base_width_pre, $sb_base_width_post);
 my $print_text_activity;
 my $shade_line_timer;
 my ($screenHeight, $screenWidth);
 my %viewer;
 
 my (%keymap, %nummap, %wnmap, %specialmap, %wnmap_exp, %custom_key_map);
 my %banned_channels;
 my %abbrev_cache;
 
 use constant setc => 'awl';
 
 sub set ($) {
     setc . '_' . $_[0]
 }
 
 sub add_statusbar {
     for (@_) {
 	# add subs
 	my $l = set $_;
 	{
 	    my $close = $_;
 	    no strict 'refs';
 	    *{$l} = sub { awl($close, @_) };
 	}
 	Irssi::command("statusbar $l reset");
 	Irssi::command("statusbar $l enable");
 	if (lc $S{placement} eq 'top') {
 	    Irssi::command("statusbar $l placement top");
 	}
 	if (my $x = $S{position}) {
 	    Irssi::command("statusbar $l position $x");
 	}
 	Irssi::command("statusbar $l add -priority 100 -alignment left barstart");
 	Irssi::command("statusbar $l add $l");
 	Irssi::command("statusbar $l add -priority 100 -alignment right barend");
 	Irssi::command("statusbar $l disable");
 	Irssi::statusbar_item_register($l, '$0', $l);
 	$statusbars{$_} = 1;
 	Irssi::command("statusbar $l enable");
     }
 }
 
 sub remove_statusbar {
     for (@_) {
 	my $l = set $_;
 	Irssi::command("statusbar $l disable");
 	Irssi::command("statusbar $l reset");
 	Irssi::statusbar_item_unregister($l);
 	{
 	    no strict 'refs';
 	    undef &{$l};
 	}
 	delete $statusbars{$_};
     }
 }
 
 my $awl_shared_empty = sub {
     return if $BLOCK_ALL;
     my ($item, $get_size_only) = @_;
     $item->default_handler($get_size_only, '', '', 0);
 };
 
 sub syncLines {
     my $maxLines = $S{maxlines};
     my $newLines = ($maxLines > 0 and @actString > $maxLines) ?
 	$maxLines :
     ($maxLines < 0) ?
 	-$maxLines :
 	    @actString;
     $currentLines = 1 if !$currentLines && $S{shared_sbar};
     if ($S{shared_sbar} && !$statusbars{shared}) {
 	my $l = set 'shared';
 	{
 	    no strict 'refs';
 	    *{$l} = sub {
 		return if $BLOCK_ALL;
 		my ($item, $get_size_only) = @_;
 
 		my $text = $actString[0];
 		my $title = _get_format(set 'title');
 		if (length $title) {
 		    $title =~ s{\\(.)|(.)}{
 			defined $2 ? quotemeta $2
 			    : $1 eq 'V' ? '\u'
 			    : $1 eq ':' ? quotemeta ':%n'
 			    : $1 =~ /^[uUFQE]$/ ? "\\$1"
 			    : quotemeta "\\$1"
 			}sge;
 		    $title = eval qq{"$title"};
 		    $title .= ' ';
 		}
 		my $pat = defined $text ? "{sb $title\$*}" : '{sb }';
 		$text //= '';
 		$item->default_handler($get_size_only, $pat, $text, 0);
 	    };
 	}
 	$statusbars{shared} = 1;
 	remove_statusbar (0) if $statusbars{0};
     }
     elsif ($statusbars{shared} && !$S{shared_sbar}) {
 	add_statusbar (0) if $currentLines && $newLines;
 	delete $statusbars{shared};
 	my $l = set 'shared';
 	{
 	    no strict 'refs';
 	    *{$l} = $awl_shared_empty;
 	}
     }
     if ($currentLines == $newLines) { return; }
     elsif ($newLines > $currentLines) {
 	add_statusbar ($currentLines .. ($newLines - 1));
     }
     else {
 	remove_statusbar (reverse ($newLines .. ($currentLines - 1)));
     }
     $currentLines = $newLines;
 }
 
 sub awl {
     return if $BLOCK_ALL;
     my ($line, $item, $get_size_only) = @_;
 
     my $text = $actString[$line];
     my $pat = defined $text ? '{sb $*}' : '{sb }';
     $text //= '';
     $item->default_handler($get_size_only, $pat, $text, 0);
 }
 
 # remove old statusbars
 { my %killBar;
   sub get_old_status {
       my ($textDest, $cont, $cont_stripped) = @_;
       if ($textDest->{level} == 524288 and $textDest->{target} eq '' and !defined $textDest->{server}) {
 	  my $name = quotemeta(set '');
 	  if ($cont_stripped =~ m/^$name(\d+)\s/) { $killBar{$1} = 1; }
 	  Irssi::signal_stop;
       }
   }
   sub killOldStatus {
       %killBar = ();
       Irssi::signal_add_first('print text' => 'get_old_status');
       Irssi::command('statusbar');
       Irssi::signal_remove('print text' => 'get_old_status');
       remove_statusbar(keys %killBar);
   }
 }
 
 sub _add_map {
     my ($type, $target, $map) = @_;
     ($type->{$target}) = sort { length $a <=> length $b || $a cmp $b }
 	$map, exists $type->{$target} ? $type->{$target} : ();
 }
 
 sub get_keymap {
     my ($textDest, undef, $cont_stripped) = @_;
     if ($textDest->{level} == 524288 and $textDest->{target} eq '' and !defined $textDest->{server}) {
 	my $one_meta_or_ctrl_key = qr/((?:meta-)*?)(?:(meta-|\^)(\S)|(\w+))/;
 	$cont_stripped = as_uni($cont_stripped);
 	if ($cont_stripped =~ m/((?:$one_meta_or_ctrl_key-)*$one_meta_or_ctrl_key)\s+(.*)$/) {
 	    my ($combo, $command) = ($1, $10);
 	    my $map = '';
 	    while ($combo =~ s/(?:-|^)$one_meta_or_ctrl_key$//) {
 		my ($level, $ctl, $key, $nkey) = ($1, $2, $3, $4);
 		my $numlevel = ($level =~ y/-//);
 		$ctl = '' if !$ctl || $ctl ne '^';
 		$map = ('-' x ($numlevel%2)) . ('+' x ($numlevel/2)) .
 		    $ctl . (defined $key ? $key : "\01$nkey\01") . $map;
 	    }
 	    for ($command) {
 		last unless length $map;
 		if (/^change_window (\d+)/i) {
 		    _add_map(\%nummap, $1, $map);
 		}
 		elsif (/^(?:command window goto|change_window) (\S+)/i) {
 		    my $window = $1;
 		    if ($window !~ /\D/) {
 			_add_map(\%nummap, $window, $map);
 		    }
 		    elsif (lc $window eq 'active') {
 			_add_map(\%specialmap, '_active', $map);
 		    }
 		    else {
 			_add_map(\%wnmap, $window, $map);
 		    }
 		}
 		elsif (/^(?:active_window|command (ack))/i) {
 		    _add_map(\%specialmap, '_active', $map);
 		    $viewer{use_ack} = !!$1;
 		}
 		elsif (/^command window last/i) {
 		    _add_map(\%specialmap, '_last', $map);
 		}
 		elsif (/^(?:upper_window|command window up)/i) {
 		    _add_map(\%specialmap, '_up', $map);
 		}
 		elsif (/^(?:lower_window|command window down)/i) {
 		    _add_map(\%specialmap, '_down', $map);
 		}
 		elsif (/^key\s+(\w+)/i) {
 		    $custom_key_map{$1} = $map;
 		}
 	    }
 	}
 	Irssi::signal_stop;
     }
 }
 
 sub update_keymap {
     %nummap = %wnmap = %specialmap = %custom_key_map = ();
     Irssi::signal_remove('command bind' => 'watch_keymap');
     Irssi::signal_add_first('print text' => 'get_keymap');
     Irssi::command('bind');
     Irssi::signal_remove('print text' => 'get_keymap');
     for (keys %custom_key_map) {
 	if (exists $custom_key_map{$_} &&
 		$custom_key_map{$_} =~ s/\01(\w+)\01/exists $custom_key_map{$1} ? $custom_key_map{$1} : "\02"/ge) {
 	    if ($custom_key_map{$_} =~ /\02/) {
 		delete $custom_key_map{$_};
 	    }
 	    else {
 		redo;
 	    }
 	}
     }
     for my $keymap (\(%specialmap, %wnmap, %nummap)) {
 	for (keys %$keymap) {
 	    if ($keymap->{$_} =~ s/\01(\w+)\01/exists $custom_key_map{$1} ? $custom_key_map{$1} : "\02"/ge) {
 		if ($keymap->{$_} =~ /\02/) {
 		    delete $keymap->{$_};
 		}
 	    }
 	}
     }
     Irssi::signal_add('command bind' => 'watch_keymap');
     delete $viewer{client_keymap};
     &wl_changed;
 }
 
 # watch keymap changes
 sub watch_keymap {
     Irssi::timeout_add_once(1000, 'update_keymap', undef);
 }
 
 { my %strip_table = (
     # fe-common::core::formats.c:format_expand_styles
     #      delete                format_backs  format_fores bold_fores   other stuff
     (map { $_ => '' } (split //, '04261537' .  'kbgcrmyw' . 'KBGCRMYW' . 'U9_8I:|FnN>#[' . 'pP')),
     #      escape
     (map { $_ => $_ } (split //, '{}%')),
    );
   sub ir_strip_codes { # strip %codes
       my $o = shift;
       $o =~ s/(%(%|Z.{6}|z.{6}|X..|x..|.))/exists $strip_table{$2} ? $strip_table{$2} :
 	  $2 =~ m{x(?:0[a-f]|[1-6][0-9a-z]|7[a-x])|z[0-9a-f]{6}}i ? '' : $1/gex;
       $o
   }
 }
 ## ir_parse_special -- wrapper around parse_special
 ## $i - input format
 ## $args - array ref of arguments to format
 ## $win - different target window (default current window)
 ## $flags - different kind of escape flags (default 4|8)
 ## returns formatted str
 sub ir_parse_special {
     my $o;
     my $i = shift;
     my $args = shift // [];
     y/ /\177/ for @$args; # hack to escape spaces
     my $win = shift || Irssi::active_win;
     my $flags = shift // 0x4|0x8;
     my @cmd_args = ($i, (join ' ', @$args), $flags);
     my $server = Irssi::active_server();
     if (ref $win and ref $win->{active}) {
 	$o = $win->{active}->parse_special(@cmd_args);
     }
     elsif (ref $win and ref $win->{active_server}) {
 	$o = $win->{active_server}->parse_special(@cmd_args);
     }
     elsif (ref $server) {
 	$o =  $server->parse_special(@cmd_args);
     }
     else {
 	$o = &Irssi::parse_special(@cmd_args);
     }
     $o =~ y/\177/ /;
     $o
 }
 
 sub sb_format_expand { # Irssi::current_theme->format_expand wrapper
     Irssi::current_theme->format_expand(
 	$_[0],
 	(
 	    Irssi::EXPAND_FLAG_IGNORE_REPLACES
 		    |
 	    ($_[1] ? 0 : Irssi::EXPAND_FLAG_IGNORE_EMPTY)
 	)
     )
 }
 
 { my $term_type = Irssi::version > 20040819 ? 'term_charset' : 'term_type';
   local $@;
   eval { require Text::CharWidth; };
   unless ($@) {
       *screen_length = sub { Text::CharWidth::mbswidth($_[0]) };
   }
   else {
       my $err = $@; chomp $err; $err =~ s/\sat .* line \d+\.$//;
       #Irssi::print("%_$IRSSI{name}: warning:%_ Text::CharWidth module failed to load. Length calculation may be off! Error was:");
       print "%_$IRSSI{name}:%_ $err";
       *screen_length = sub {
 	  my $temp = shift;
 	  if (lc Irssi::settings_get_str($term_type) eq 'utf-8') {
 	      Encode::_utf8_on($temp);
 	  }
 	  length($temp)
       };
   }
   sub as_uni {
       no warnings 'utf8';
       Encode::decode(Irssi::settings_get_str($term_type), $_[0], 0)
   }
   sub as_tc {
       Encode::encode(Irssi::settings_get_str($term_type), $_[0], 0)
   }
 }
 
 sub sb_length {
     screen_length(ir_strip_codes($_[0]))
 }
 
 sub run_custom_xform {
     local $@;
     eval {
 	$custom_xform->()
     };
     if ($@) {
 	$@ =~ /^(.*)/;
 	print '%_'.(set 'custom_xform').'%_ died (disabling): '.$1;
 	$custom_xform = undef;
     }
 }
 
 sub remove_uniform {
     my $o = shift;
     $o =~ s/^xmpp:(.*?[%@]).+\.[^.]+$/$1/ or
 	$o =~ s#^psyc://.+\.[^.]+/([@~].*)$#$1#;
     if ($custom_xform) {
 	run_custom_xform() for $o;
     }
     $o
 }
 
 sub remove_uniform_vars {
     my $win = shift;
     my $name = __PACKAGE__ . '::custom_xform::' . $win->{active}{type}
 	if ref $win->{active} && $win->{active}{type};
     no strict 'refs';
     local ${$name} = 1 if $name;
     remove_uniform(+shift);
 }
 
 sub lc1459 {
     my $x = shift;
     $x =~ y/][\\^/}{|~/;
     lc $x
 }
 
 sub window_list {
     sort $window_sort_func Irssi::windows;
 }
 
 sub _calculate_abbrev {
     my ($wins, $abbrevList) = @_;
     if ($S{fancy_abbrev} !~ /^(no|off|head)/i) {
 	my @nameList = map { ref $_ ? remove_uniform_vars($_, as_uni($_->get_active_name) // '') : '' } @$wins;
 	for (my $i = 0; $i < @nameList - 1; ++$i) {
 	    my ($x, $y) = ($nameList[$i], $nameList[$i + 1]);
 	    s/^[+#!=]// for $x, $y;
 	    my $res = exists $abbrev_cache{$x}{$y} ? $abbrev_cache{$x}{$y}
 		: $abbrev_cache{$x}{$y} = string_LCSS($x, $y);
 	    if (defined $res) {
 		for ($nameList[$i], $nameList[$i + 1]) {
 		    $abbrevList->{$_} //= int((index $_, $res) + (length $res) / 2);
 		}
 	    }
 	}
     }
 }
 
 my %act_last_line_shades = (
     r => [qw[ 50 40 30 20 ]],
     g => [qw[ 1O 1I 1C 16 ]],
     y => [qw[ 5O 4I 3C 26 ]],
     b => [qw[ 15 14 13 12 ]],
     m => [qw[ 54 43 32 21 ]],
     c => [qw[ 1S 1L 1E 17 ]],
     w => [qw[ 7W 7T 7Q 3E ]],
     K => [qw[ 7M 7K 27 7H ]],
     R => [qw[ 60 50 40 30 ]],
     G => [qw[ 1U 1O 1I 1C ]],
     Y => [qw[ 6U 5O 4I 3C ]],
     B => [qw[ 2B 2A 29 28 ]],
     M => [qw[ 65 54 43 32 ]],
     C => [qw[ 1Z 1S 1L 1E ]],
     W => [qw[ 6Z 5S 7R 7O ]],
    );
 
 sub _format_display {
     my (undef, $format, $cformat, $hilight, $name, $number, $key, $win) = @_;
     if ($print_text_activity && $S{line_shade}) {
 	my @hilight_code = split /\177/, sb_format_expand("{$hilight \177}"), 2;
 	my $max_time = max(1, log($S{line_shade}) - log(1000));
 	my $time_delta = min(3, min($max_time, log(max(1, time - $win->{last_line}))) / $max_time * 3);
 	if ($hilight_code[0] =~ /%(.)/ && exists $act_last_line_shades{$1}) {
 	    $hilight = 'sb_act_hilight_color %X'.$act_last_line_shades{$1}[$time_delta];
 	}
     }
     $cformat = '$0' unless length $cformat;
     my %map = ('$C' => $cformat, '$N' => '$1', '$Q' => '$2');
     $format =~ s<(\$.)><$map{$1}//$1>ge;
     $format =~ s<\$H((?:\$.|[^\$])*?)\$S><{$hilight $1%n}>g;
     my @ret = ir_parse_special(sb_format_expand($format), [$name, $number, $key], $win);
     @ret
 }
 
 sub _get_format {
     Irssi::current_theme->get_format(__PACKAGE__, @_)
 }
 
 sub _calculate_items {
     my ($wins, $abbrevList) = @_;
 
     my $display_header = _get_format(set 'display_header');
     my $name_format = _get_format(set 'name_display');
     my $abbrev_chars = as_uni(_get_format(set 'abbrev_chars'));
 
     my %displays;
 
     my $active = Irssi::active_win;
     @win_items = ();
     %keymap = (%nummap, %wnmap_exp);
 
     my ($numPad, $keyPad) = (0, 0);
     if ($VIEWER_MODE or $S{block} < 0) {
 	$numPad = length((sort { length $b <=> length $a } keys %keymap)[0]) // 0;
 	$keyPad = length((sort { length $b <=> length $a } values %keymap)[0]) // 0;
     }
     my $last_net;
     my ($abbrev1, $abbrev2) = $abbrev_chars =~ /(\X)(.*)/;
     my @abbrev_chars = ('~', "\x{301c}");
     unless (defined $abbrev1 && screen_length(as_tc($abbrev1)) == 1) { $abbrev1 = $abbrev_chars[0] }
     unless (length $abbrev2) {
 	$abbrev2 = $abbrev1;
 	if ($abbrev1 eq $abbrev_chars[0]) {
 	    $abbrev2 = $abbrev_chars[1];
 	}
 	else {
 	    $abbrev2 = $abbrev1;
 	}
     }
     if (screen_length(as_tc($abbrev2)) == 1) {
 	$abbrev2 x= 2;
     }
     while (screen_length(as_tc($abbrev2)) > 2) {
 	chop $abbrev2;
     }
     unless (screen_length(as_tc($abbrev2)) == 2) {
 	$abbrev2 = $abbrev_chars[1];
     }
     for my $win (@$wins) {
 	my $global_tag_header_mode;
 
 	next unless ref $win;
 
 	my $backup_win = Storable::dclone($win);
 	delete $backup_win->{active} unless ref $backup_win->{active};
 
 	$global_tag_header_mode =
 	    $display_header && ($last_net // '') ne ($backup_win->{active}{server}{tag} // '');
 
 	if ($win->{data_level} < abs $S{hide_data}
 		&& ($win->{refnum} != $active->{refnum} || 0 <= $S{hide_data})) {
 	    next; }
 	elsif (exists $awins{$win->{refnum}} && $S{hide_empty} && !$win->items
 		&& ($win->{refnum} != $active->{refnum} || 0 <= $S{hide_empty})) {
 	    next; }
 
 	my $colour = $win->{hilight_color} // '';
 	my $hilight = do {
 	    if    ($win->{data_level} == 0) { 'sb_act_none'; }
 	    elsif ($win->{data_level} == 1) { 'sb_act_text'; }
 	    elsif ($win->{data_level} == 2) { 'sb_act_msg'; }
 	    elsif ($colour           ne '') { "sb_act_hilight_color $colour"; }
 	    elsif ($win->{data_level} == 3) { 'sb_act_hilight'; }
 	    else                            { 'sb_act_special'; }
 	};
 	my $number = $win->{refnum};
 
 	my ($name, $display, $cdisplay);
 	if ($global_tag_header_mode) {
 	    $display = $display_header;
 	    $name = as_uni($backup_win->{active}{server}{tag}) // '';
 	    if ($custom_xform) {
 		no strict 'refs';
 		local ${ __PACKAGE__ . '::custom_xform::TAG' } = 1;
 		run_custom_xform() for $name;
 	    }
 	}
 	else {
 	    my @display = ('display_nokey');
 	    if (defined $keymap{$number} and $keymap{$number} ne '') {
 		unshift @display, map { (my $cpy = $_) =~ s/_no/_/; $cpy } @display;
 	    }
 	    if (exists $awins{$number}) {
 		unshift @display, map { my $cpy = $_; $cpy .= '_visible'; $cpy } @display;
 	    }
 	    if ($active->{refnum} == $number) {
 		unshift @display, map { my $cpy = $_; $cpy .= '_active'; $cpy }
 		    grep { !/_visible$/ } @display;
 	    }
 	    $display = (grep { length $_ }
 			       map { $displays{$_} //= _get_format(set $_) }
 				   @display)[0];
 	    $cdisplay = $name_format;
 	    $name = as_uni($win->get_active_name) // '';
 	    $name = '*' if $S{banned_on} and exists $banned_channels{lc1459($name)};
 	    $name = remove_uniform_vars($win, $name) if $name ne '*';
 	    if ($name ne '*' and $win->{name} ne '' and $S{prefer_name}) {
 		$name = as_uni($win->{name});
 		if ($custom_xform) {
 		    no strict 'refs';
 		    local ${ __PACKAGE__ . '::custom_xform::NAME' } = 1;
 		    run_custom_xform() for $name;
 		}
 	    }
 
 	    if (!$VIEWER_MODE && $S{block} >= 0 && $S{hide_name}
 		&& $win->{data_level} < abs $S{hide_name}
 		&& ($win->{refnum} != $active->{refnum} || 0 <= $S{hide_name})) {
 		$name = '';
 		$cdisplay = '';
 	    }
 	}
 
 	$display = "$display%n";
 	my $num_ent = (' 'x max(0,$numPad - length $number)) . $number;
 	my $key_ent = exists $keymap{$number} ? ((' 'x max(0,$keyPad - length $keymap{$number})) . $keymap{$number}) : ' 'x$keyPad;
 	if ($VIEWER_MODE or $S{sbar_maxlen} or $S{block} < 0) {
 	    my $baseLength = sb_length(_format_display(
 		'', $display, $cdisplay, $hilight,
 		'x', # placeholder
 		$num_ent,
 		$key_ent,
 		$win)) - 1;
 	    my $diff = (abs $S{block}) - (screen_length(as_tc($name)) + $baseLength);
 	    if ($diff < 0) { # too long
 		my $screen_length = screen_length(as_tc($name));
 		if ((abs $diff) >= $screen_length) { $name = '' } # forget it
 		elsif ((abs $diff) + screen_length(as_tc(substr($name, 0, 1))) >= $screen_length) { $name = substr($name, 0, 1); }
 		else {
 		    my $ulen = length $name;
 		    my $middle2 = exists $abbrevList->{$name} ?
 			($S{fancy_strict}) ?
 			    2* $abbrevList->{$name} :
 			   (2*($abbrevList->{$name} + $ulen) / 3) :
 			       ($S{fancy_head}) ?
 				2*$ulen :
 				    $ulen;
 		    my $first = 1;
 		    while (length $name > 1) {
 			my $cp = $middle2 >= 0 ? $middle2/2 : -1; # clearing position
 			my $rm = 2;
 			# if character at end is wider than 1 cell -> replace it with ~
 			if (screen_length(as_tc(substr $name, $cp, 1)) > 1) {
 			    if ($first || $cp < 0) {
 				$rm = 1;
 				$first = undef;
 			    }
 			}
 			elsif ($cp < 0) { # elsif at end -> replace last 2 characters
 			    --$cp;
 			}
 			(substr $name, $cp, $rm) = $abbrev1;
 			if ($cp > -1 && $rm > 1) {
 			    --$middle2;
 			}
 			my $sl = screen_length(as_tc($name));
 			if ($sl + $baseLength < abs $S{block}) {
 			    (substr $name, ($middle2+1)/2, 1) = $abbrev2;
 			    last;
 			}
 			elsif ($sl + $baseLength == abs $S{block}) {
 			    last;
 			}
 		    }
 		}
 	    }
 	    elsif ($VIEWER_MODE or $S{block} < 0) {
 		$name .= (' ' x $diff);
 	    }
 	}
 
 	push @win_items, _format_display(
 	    '', $display, $cdisplay, $hilight,
 	    as_tc($name),
 	    $num_ent,
 	    as_tc($key_ent),
 	    $win);
 
 	if ($global_tag_header_mode) {
 	    $last_net = $backup_win->{active}{server}{tag};
 	    redo;
 	}
 
 	$mouse_coords{refnum}{$#win_items} = $number;
     }
 }
 
 sub _spread_items {
     my $width = [Irssi::windows]->[0]{width} - $sb_base_width - 1;
     my @separator = _get_format(set 'separator');
     if ($S{block} >= 0) {
 	my $sep2 = _get_format(set 'separator2');
 	push @separator, $sep2 if length $sep2 && $sep2 ne $separator[0];
     }
     $separator[0] .= '%n';
     my @sepLen = map { sb_length($_) } @separator;
 
     @actString = ();
     my $curLine;
     my $curLen = 0;
     if ($S{shared_sbar}) {
 	$curLen += $S{shared_sbar}[0] + 2;
 	$width -= $S{shared_sbar}[2];
     }
     my $mouse_header_check = 0;
     for my $it (@win_items) {
 	my $itemLen = sb_length($it);
 	if ($curLen) {
 	    if ($curLen + $itemLen + $sepLen[$mouse_header_check % @sepLen] > $width) {
 		$width += $S{shared_sbar}[2]
 		    if !@actString && $S{shared_sbar};
 		push @actString, $curLine;
 		$curLine = undef;
 		$curLen = 0;
 	    }
 	    elsif (defined $curLine) {
 		$curLine .= $separator[$mouse_header_check % @separator];
 		$curLen += $sepLen[$mouse_header_check % @sepLen];
 	    }
 	}
 	$curLine .= $it;
 	if (exists $mouse_coords{refnum}{$mouse_header_check}) {
 	    $mouse_coords{scalar @actString}{ $_ } = $mouse_coords{refnum}{$mouse_header_check}
 		for $curLen .. $curLen + $itemLen - 1;
 	}
 	$curLen += $itemLen;
     }
     continue {
 	++$mouse_header_check;
     }
     $curLen -= $S{shared_sbar}[0]
 	if !@actString && $S{shared_sbar};
     push @actString, $curLine if $curLen;
 }
 
 sub remake {
     my %abbrevList;
     my @wins = window_list();
     if ($VIEWER_MODE or $S{sbar_maxlen} or $S{block} < 0) {
 	_calculate_abbrev(\@wins, \%abbrevList);
     }
 
     %mouse_coords = ( refnum => +{} );
     _calculate_items(\@wins, \%abbrevList);
 
     unless ($VIEWER_MODE) {
 	_spread_items();
 
 	push @actString, undef unless @actString || $S{all_disable};
     }
 }
 
 sub update_wl {
     return if $BLOCK_ALL;
     remake();
 
     Irssi::statusbar_items_redraw(set $_) for keys %statusbars;
 
     unless ($VIEWER_MODE) {
 	Irssi::timeout_add_once(100, 'syncLines', undef);
     }
     else {
 	syncViewer();
     }
 }
 
 sub screenFullRedraw {
     my ($window) = @_;
     if (!ref $window or $window->{refnum} == Irssi::active_win->{refnum}) {
 	$viewer{fullRedraw} = 1 if $viewer{client};
 	$settings_str = '';
 	&setup_changed;
     }
 }
 
 sub restartViewerServer {
     if ($VIEWER_MODE) {
 	stop_viewer();
 	start_viewer();
     }
 }
 
 sub _simple_quote {
     my @r = map {
 	my $x = $_;
 	$x =~ s/'/'"'"'/g;
 	$x = "'$x'";
     } @_;
     wantarray ? @r : shift @r
 }
 
 sub _viewer_command_replace_format {
     my ($ecmd, @args) = @_;
     my $file = _simple_quote(SCRIPT_FILE());
     my $path = _simple_quote($viewer{path});
     my @env;
     for my $env (shellwords($S{viewer_launch_env})) {
 	if ($env =~ /^(\w+)(?:=(.*))$/) {
 	    push @env, "AWL_$1=$2"
 	}
     }
     my $cmd = join ' ',
 	(@env ? ('env', _simple_quote(@env)) : ()),
 	'perl', $file, '-1', _simple_quote(@args), $path;
     $ecmd =~ s{%(%|\w+)}{
 	my $sub = $1;
 	if ($sub eq '%') {
 	    '%'
 	}
 	elsif ($sub =~ /^(q*)A(.*)/) {
 	    my $ret = $cmd;
 	    for (1..length $1) {
 		$ret = _simple_quote($ret);
 	    }
 	    "$ret$2"
 	}
 	else {
 	    "%$sub"
 	}
     }gex;
     $ecmd
 }
 
 sub start_viewer {
     unlink $viewer{path} if -S $viewer{path} || -p _;
 
     $viewer{server} = IO::Socket::UNIX->new(
 	Type => SOCK_STREAM,
 	Local => $viewer{path},
 	Listen => 1
        );
     unless ($viewer{server}) {
 	$viewer{msg} = "Viewer: $!";
 	$viewer{retry} = Irssi::timeout_add_once(5000, 'retry_viewer', 1);
 	return;
     }
     $viewer{server}->blocking(0);
     set_viewer_mode_hint();
     $viewer{server_tag} = Irssi::input_add($viewer{server}->fileno, INPUT_READ, 'vi_connected', undef);
 
     if ($S{viewer_launch}) {
 	if (length $ENV{TMUX_PANE} && length $ENV{TMUX} && lc $S{viewer_tmux_position} ne 'custom') {
 	    my $cmd = _viewer_command_replace_format('%qA', '-p', lc $S{viewer_tmux_position});
 	    Irssi::command("exec - tmux neww -d $cmd 2>&1 &");
 	}
 	elsif (length $ENV{WINDOWID} && length $ENV{DISPLAY} && length $S{viewer_xwin_command} && $S{viewer_xwin_command} =~ /\S/) {
 	    my $cmd = _viewer_command_replace_format($S{viewer_xwin_command});
 	    Irssi::command("exec - $cmd 2>&1 &");
 	}
 	elsif (length $S{viewer_custom_command} && $S{viewer_custom_command} =~ /\S/) {
 	    my $cmd = _viewer_command_replace_format($S{viewer_custom_command});
 	    Irssi::command("exec - $cmd 2>&1 &");
 	}
     }
 }
 
 sub set_viewer_mode_hint {
     return unless $viewer{server};
     if ($S{no_mode_hint}) {
 	$viewer{msg} = undef;
     }
     else {
 	my ($name) = __PACKAGE__ =~ /::([^:]+)$/;
 	$viewer{msg} = "Run $name from the shell or switch to sbar mode";
     }
 }
 
 sub retry_viewer {
     start_viewer();
 }
 
 sub vi_close_client {
     Irssi::input_remove(delete $viewer{client_tag}) if exists $viewer{client_tag};
     $viewer{client}->close if $viewer{client};
     delete $viewer{client};
     delete $viewer{client_keymap};
     delete $viewer{client_settings};
     delete $viewer{client_env};
     delete $viewer{fullRedraw};
 }
 
 sub vi_connected {
     vi_close_client();
     $viewer{client} = $viewer{server}->accept or return;
     $viewer{client}->blocking(0);
     $viewer{client_tag} = Irssi::input_add($viewer{client}->fileno, INPUT_READ, 'vi_clientinput', undef);
     syncViewer();
 }
 
 use constant VIEWER_BLOCK_SIZE => 1024;
 sub vi_clientinput {
     if ($viewer{client}->read(my $buf, VIEWER_BLOCK_SIZE)) {
 	$viewer{rcvbuf} .= $buf;
 	if ($viewer{rcvbuf} =~ s/^(?:(active|\d+)|(last|up|down))\n//igm) {
 	    if (defined $2) {
 		Irssi::command("window $2");
 	    }
 	    elsif (lc $1 eq 'active' && $viewer{use_ack}) {
 		Irssi::command("ack");
 	    }
 	    else {
 		Irssi::command("window goto $1");
 	    }
 	}
     }
     else {
 	vi_close_client();
 	Irssi::timeout_add_once(100, 'syncViewer', undef);
     }
 }
 
 sub stop_viewer {
     Irssi::timeout_remove(delete $viewer{retry}) if exists $viewer{retry};
     vi_close_client();
     Irssi::input_remove(delete $viewer{server_tag}) if exists $viewer{server_tag};
     return unless $viewer{server};
     $viewer{server}->close;
     delete $viewer{server};
 }
 sub _encode_var {
     my $str;
     while (@_) {
 	my ($name, $var) = splice @_, 0, 2;
 	my $type = ref $var ? $var =~ /HASH/ ? 'map' : $var =~ /ARRAY/ ? 'list' : '' : '';
 	$str .= "\n\U$name$type\_begin\n";
 	if ($type eq 'map') {
 	    no warnings 'numeric';
 	    $str .= " $_\n ${$var}{$_}\n" for sort { $a <=> $b || $a cmp $b } keys %$var;
 	}
 	elsif ($type eq 'list') {
 	    $str .= " $_\n" for @$var;
 	}
 	else {
 	    $str .= " $var\n";
 	}
 	$str .= "\U$name$type\_end\n";
     }
     $str
 }
 sub syncViewer {
     if ($viewer{client}) {
 	@actString = ();
 	if ($currentLines) {
 	    killOldStatus();
 	    $currentLines = 0;
 	}
 	my $str;
 	unless ($viewer{client_keymap}) {
 	    $str .= _encode_var('key', +{ %nummap, %specialmap });
 	    $viewer{client_keymap} = 1;
 	}
 	unless ($viewer{client_settings}) {
 	    $str .= _encode_var(
 		block => $S{block},
 		ha => $S{height_adjust},
 		mc => $S{maxcolumns},
 		ml => $S{maxlines},
 	       );
 	    $viewer{client_settings} = 1;
 	}
 	unless ($viewer{client_env}) {
 	    $str .= _encode_var(irssienv => +{
 		length $ENV{TMUX_PANE} && length $ENV{TMUX} ?
 		     (tmux_pane => $ENV{TMUX_PANE},
 		      tmux_srv => $ENV{TMUX}) : (),
 		length $ENV{WINDOWID} ?
 		     (xwinid => $ENV{WINDOWID}) : (),
 	       });
 	    $viewer{client_env} = 1;
 	}
 	my $separator = _get_format(set 'separator');
 	my $sepLen = sb_length($separator);
 	my $item_bg = _get_format(set 'viewer_item_bg');
 	my $title = _get_format(set 'title');
 	if (length $title) {
 	    $title =~ s{\\(.)|(.)}{
 		defined $2 ? quotemeta $2
 		    : $1 eq 'V' ? '\U'
 		    : $1 eq ':' ? quotemeta '%N'
 		    : $1 =~ /^[uUFQE]$/ ? "\\$1"
 		    : quotemeta "\\$1"
 		}sge;
 	    $title = eval qq{"$title"};
 	}
 	$str .= _encode_var(redraw => 1) if delete $viewer{fullRedraw};
 	$str .= _encode_var(separator => $separator,
 			    seplen => $sepLen,
 			    itembg => $item_bg,
 			    title => $title,
 			    mouse => $mouse_coords{refnum},
 			    key2 => \%wnmap_exp,
 			    win => \@win_items);
 
 	my $was = $viewer{client}->blocking(1);
 	$viewer{client}->print($str);
 	$viewer{client}->blocking($was);
     }
     elsif ($viewer{server}) {
 	if (defined $viewer{msg}) {
 	    @actString = ((uc setc()).": $viewer{msg}");
 	}
 	else {
 	    @actString = ();
 	}
     }
     elsif (defined $viewer{msg}) {
 	@actString = ((uc setc()).": $viewer{msg}");
     }
     if (@actString) {
 	Irssi::timeout_add_once(100, 'syncLines', undef);
     }
     elsif ($currentLines) {
 	killOldStatus();
 	$currentLines = 0;
     }
 }
 
 sub reset_awl {
     Irssi::timeout_remove($shade_line_timer) if $shade_line_timer; $shade_line_timer = undef;
     my $was_sort = $S{sort} // '';
     my $was_xform = $S{xform} // '';
     my $was_shared = $S{shared_sbar};
     my $was_no_hint = $S{no_mode_hint};
     %S = (
 	sort	      => Irssi::settings_get_str( set 'sort'),
 	fancy_abbrev  => Irssi::settings_get_str('fancy_abbrev'),
 	xform	      => Irssi::settings_get_str( set 'custom_xform'),
 	block	      => Irssi::settings_get_int( set 'block'),
 	banned_on     => Irssi::settings_get_bool('banned_channels_on'),
 	prefer_name   => Irssi::settings_get_bool(set 'prefer_name'),
 	hide_data     => Irssi::settings_get_int( set 'hide_data'),
 	hide_name     => Irssi::settings_get_int( set 'hide_name_data'),
 	hide_empty    => Irssi::settings_get_int( set 'hide_empty'),
 	sbar_maxlen   => Irssi::settings_get_bool(set 'sbar_maxlength'),
 	placement     => Irssi::settings_get_str( set 'placement'),
 	position      => Irssi::settings_get_int( set 'position'),
 	maxlines      => Irssi::settings_get_int( set 'maxlines'),
 	maxcolumns    => Irssi::settings_get_int( set 'maxcolumns'),
 	all_disable   => Irssi::settings_get_bool(set 'all_disable'),
 	height_adjust => Irssi::settings_get_int( set 'height_adjust'),
 	mouse_offset  => Irssi::settings_get_int( set 'mouse_offset'),
 	mouse_scroll  => Irssi::settings_get_int( 'mouse_scroll'),
 	mouse_escape  => Irssi::settings_get_int( 'mouse_escape'),
 	line_shade    => Irssi::settings_get_time(set 'last_line_shade'),
 	no_mode_hint  => Irssi::settings_get_bool(set 'no_mode_hint'),
 	viewer_launch	      => Irssi::settings_get_bool(set 'viewer_launch'),
 	viewer_launch_env     => Irssi::settings_get_str(set 'viewer_launch_env'),
 	viewer_xwin_command   => Irssi::settings_get_str(set 'viewer_xwin_command'),
 	viewer_custom_command => Irssi::settings_get_str(set 'viewer_custom_command'),
 	viewer_tmux_position  => Irssi::settings_get_str(set 'viewer_tmux_position'),
 	);
     $S{fancy_strict} = $S{fancy_abbrev} =~ /^strict/i;
     $S{fancy_head} = $S{fancy_abbrev} =~ /^head/i;
     my $shared = Irssi::settings_get_str(set 'shared_sbar');
     if ($shared =~ /^(\d+)([<])(\d+)$/) {
 	$S{shared_sbar} = [$1, $2, $3];
     }
     else {
 	Irssi::settings_set_str(set 'shared_sbar', 'OFF');
 	$S{shared_sbar} = undef;
     }
     lock_keys(%S);
     if ($was_sort ne $S{sort}) {
 	$print_text_activity = undef;
 	my @sort_order = grep { @$_ > 4 } map {
 	    s/^\s*//;
 	    my $reverse = s/^\W*\K[-!]//;
 	    my $undef_check = s/^\W*\K~// ? 1 : undef;
 	    my $equal_check = s/=(.*)\s?$// ? $1 : undef;
 	    s/\s*$//;
 	    my $ignore_case = s/#i$// ? 1 : undef;
 
 	    $print_text_activity = 1 if $_ eq 'last_line';
 
 	    my @path = split '/';
 	    my $class_check = @path && $path[-1] =~ s/(::.*)$// ? $1 : undef;
 
 	    [ $reverse ? -1 : 1, $undef_check, $equal_check, $class_check, $ignore_case, @path ]
 	} "$S{sort}," =~ /([^+,]*|[^+,]*=[^,]*?\s(?=\+)|[^+,]*=[^,]*)[+,]/g;
 	$window_sort_func = sub {
 	    no warnings qw(numeric uninitialized);
 	    for my $so (@sort_order) {
 		my @x = map {
 		    my $ret = 0;
 		    $_ = lc1459($_) if defined $_ && !ref $_ && $so->[4];
 		    $ret = $_ eq ($so->[4] ? lc1459($so->[2]) : $so->[2]) ? 1 : -1 if defined $so->[2];
 		    $ret = defined $_ ? ($ret || -3) : 3 if $so->[1];
 		    $ret = ref $_ && $_->isa('Irssi'.$so->[3]) ? 2 : ($ret || -2) if $so->[3];
 		    -$ret || $_
 		}
 		map {
 		    reduce { return unless ref $a; $a->{$b} } $_, @{$so}[5..$#$so]
 		} $a, $b;
 		return ((($x[0] <=> $x[1] || $x[0] cmp $x[1]) * $so->[0]) || next);
 	    }
 	    return ($a->{refnum} <=> $b->{refnum});
 	};
     }
     if ($was_xform ne $S{xform}) {
 	if ($S{xform} !~ /\S/) {
 	    $custom_xform = undef;
 	}
 	else {
 	    my $script_pkg = __PACKAGE__ . '::custom_xform';
 	    local $@;
 	    $custom_xform = eval qq{
 package $script_pkg;
 use strict;
 no warnings;
 our (\$QUERY, \$CHANNEL, \$TAG, \$NAME);
 return sub {
 # line 1 @{[ set 'custom_xform' ]}\n$S{xform}\n}};
 	    if ($@) {
 		$@ =~ /^(.*)/;
 		print '%_'.(set 'custom_xform').'%_ did not compile: '.$1;
 	    }
 	}
     }
 
     my $new_settings = join "\n", $VIEWER_MODE
 	 ? ("\\", $S{block}, $S{height_adjust}, $S{maxlines}, $S{maxcolumns})
 	 : ("!", $S{placement}, $S{position});
 
     if ($settings_str ne $new_settings) {
 	@actString = ();
 	%abbrev_cache = ();
 	$currentLines = 0;
 	killOldStatus();
 	delete $viewer{client_settings};
 	$settings_str = $new_settings;
     }
 
     my $was_mouse_mode = $MOUSE_ON;
     if ($MOUSE_ON = Irssi::settings_get_bool(set 'mouse') and !$was_mouse_mode) {
 	install_mouse();
     }
     elsif ($was_mouse_mode and !$MOUSE_ON) {
 	uninstall_mouse();
     }
 
     my $path = Irssi::settings_get_str(set 'path');
     my $was_viewer_mode = $VIEWER_MODE;
     if ($was_viewer_mode &&
 	defined $viewer{path} && $viewer{path} ne $path) {
 	stop_viewer();
 	$was_viewer_mode = 0;
     }
     elsif ($was_viewer_mode && $S{no_mode_hint} != $was_no_hint + 0) {
 	set_viewer_mode_hint();
     }
     $viewer{path} = $path;
     if ($VIEWER_MODE = Irssi::settings_get_bool(set 'viewer') and !$was_viewer_mode) {
 	start_viewer();
     }
     elsif ($was_viewer_mode and !$VIEWER_MODE) {
 	stop_viewer();
     }
 
     %banned_channels = map { lc1459(to_uni($_)) => undef }
 	split ' ', Irssi::settings_get_str('banned_channels');
 
     my @sb_base = split /\177/, sb_format_expand("{sbstart}{sb \177}{sbend}"), 2;
     $sb_base_width_pre = sb_length($sb_base[0]);
     $sb_base_width_post = max 0, sb_length($sb_base[1])-1;
     $sb_base_width = $sb_base_width_pre + $sb_base_width_post;
 
     if ($print_text_activity && $S{line_shade}) {
 	$shade_line_timer = Irssi::timeout_add(max(10 * GLOB_QUEUE_TIMER, 100*$S{line_shade}**(1/3)), 'wl_changed', undef);
     }
 
     $CHANGED{AWINS} = 1;
 }
 
 sub stop_mouse_tracking {
     print STDERR "\e[?1005l\e[?1000l";
 }
 sub start_mouse_tracking {
     print STDERR "\e[?1000h\e[?1005h";
 }
 sub install_mouse {
     Irssi::command_bind('mouse_xterm' => 'mouse_xterm');
     Irssi::command('^bind meta-[M command mouse_xterm');
     Irssi::signal_add_first('gui key pressed' => 'mouse_key_hook');
     start_mouse_tracking();
 }
 sub uninstall_mouse {
     stop_mouse_tracking();
     Irssi::signal_remove('gui key pressed' => 'mouse_key_hook');
     Irssi::command('^bind -delete meta-[M');
     Irssi::command_unbind('mouse_xterm' => 'mouse_xterm');
 }
 
 sub awl_mouse_event {
     return if $VIEWER_MODE;
     if ((($_[0] == 3 and $_[3] == 0)
 	     || $_[0] == 64 || $_[0] == 65) and
 	    $_[1] == $_[4] and $_[2] == $_[5]) {
 	my $top = lc $S{placement} eq 'top';
 	my ($pos, $line) = @_[1 .. 2];
 	unless ($top) {
 	    $line -= $screenHeight;
 	    $line += $currentLines;
 	    $line += $S{mouse_offset};
 	}
 	else {
 	    $line -= $S{mouse_offset};
 	}
 	$pos -= $sb_base_width_pre;
 	return if $line < 0 || $line >= $currentLines;
 	if ($_[0] == 64) {
 	    Irssi::command('window up');
 	}
 	elsif ($_[0] == 65) {
 	    Irssi::command('window down');
 	}
 	elsif (exists $mouse_coords{$line}{$pos}) {
 	    my $win = $mouse_coords{$line}{$pos};
 	    Irssi::command('window ' . $win);
 	}
 	Irssi::signal_stop;
     }
 }
 
 sub mouse_scroll_event {
     return unless $S{mouse_scroll};
     if (($_[3] == 64 or $_[3] == 65) and
 	    $_[0] == $_[3] and $_[1] == $_[4] and $_[2] == $_[5]) {
 	my $cmd = 'scrollback goto ' . ($_[3] == 64 ? '-' : '+') . $S{mouse_scroll};
 	Irssi::active_win->command($cmd);
 	Irssi::signal_stop;
     }
     elsif ($_[0] == 64 or $_[0] == 65) {
 	Irssi::signal_stop;
     }
 }
 
 sub mouse_escape {
     return unless $S{mouse_escape} > 0;
     if ($_[0] == 3) {
 	my $tm = $S{mouse_escape};
 	$tm *= 1000 if $tm < 1000;
 	stop_mouse_tracking();
 	Irssi::timeout_add_once($tm, 'start_mouse_tracking', undef);
 	Irssi::signal_stop;
     }
 }
 
 sub UNLOAD {
     @actString = ();
     killOldStatus();
     stop_viewer() if $VIEWER_MODE;
     uninstall_mouse() if $MOUSE_ON;
 }
 
 sub addPrintTextHook { # update on print text
     return unless defined $^S;
     return if $BLOCK_ALL;
     return unless $print_text_activity;
     return if $_[0]->{level} == 262144 and $_[0]->{target} eq ''
 	and !defined($_[0]->{server});
     &wl_changed;
 }
 
 sub block_event_window_change {
     Irssi::signal_stop;
 }
 
 sub update_awins {
     my @wins = Irssi::windows;
     local $BLOCK_ALL = 1;
     Irssi::signal_add_first('window changed' => 'block_event_window_change');
     my $bwin =
 	my $awin = Irssi::active_win;
     my $lwin;
     my $defer_irssi_broken_last;
     unless ($wins[0]{refnum} == $awin->{refnum}) {
 	# special case: more than 1 last win, so /win last;
 	# /win last doesn't come back to the current window. eg. after
 	# connect & autojoin; we can't handle this situation, bail out
 	$defer_irssi_broken_last = 1;
     }
     else {
 	$awin->command('window last');
 	$lwin = Irssi::active_win;
 	$lwin->command('window last');
 	$defer_irssi_broken_last = $lwin->{refnum} == $bwin->{refnum};
     }
     my $awin_counter = 0;
     Irssi::signal_remove('window changed' => 'block_event_window_change');
     unless ($defer_irssi_broken_last) {
 	# we need to keep the fe-windows code running here
 	Irssi::signal_add_priority('window changed' => 'block_event_window_change', -99);
 	%awins = %wnmap_exp = ();
 	do {
 	    Irssi::active_win->command('window up');
 	    $awin = Irssi::active_win;
 	    $awins{$awin->{refnum}} = undef;
 	    ++$awin_counter;
 	} until ($awin->{refnum} == $bwin->{refnum} || $awin_counter >= @wins);
 	Irssi::signal_remove('window changed' => 'block_event_window_change');
 
 	Irssi::signal_add_first('window changed' => 'block_event_window_change');
 	for my $key (keys %wnmap) {
 	    next unless Irssi::window_find_name($key) || Irssi::window_find_item($key);
 	    $awin->command("window goto $key");
 	    my $cwin = Irssi::active_win;
 	    $wnmap_exp{ $cwin->{refnum} } = $wnmap{$key};
 	    $cwin->command('window last')
 		if $cwin->{refnum} != $awin->{refnum};
 	}
 	for my $win (reverse @wins) { # restore original window order
 	    Irssi::active_win->command('window '.$win->{refnum});
 	}
 	$awin->command('window '.$lwin->{refnum}); # restore last win
 	Irssi::active_win->command('window last');
 	Irssi::signal_remove('window changed' => 'block_event_window_change');
     }
     $CHANGED{WL} = 1;
 }
 
 sub resizeTerm {
     if (defined (my $r = `stty size 2>/dev/null`)) {
 	($screenHeight, $screenWidth) = split ' ', $r;
 	$CHANGED{SETUP} = 1;
     }
     else {
 	$CHANGED{SIZE} = 1;
     }
 }
 
 sub awl_refresh {
     $globTime = undef;
     resizeTerm()   if delete $CHANGED{SIZE};
     reset_awl()    if delete $CHANGED{SETUP};
     update_awins() if delete $CHANGED{AWINS};
     update_wl()    if delete $CHANGED{WL};
 }
 
 sub termsize_changed { $CHANGED{SIZE}  = 1; &queue_refresh; }
 sub setup_changed    { $CHANGED{SETUP} = 1; &queue_refresh; }
 sub awins_changed    { $CHANGED{AWINS} = 1; &queue_refresh; }
 sub wl_changed       { $CHANGED{WL}    = 1; &queue_refresh; }
 
 sub window_changed {
     &awins_changed if $_[1];
 }
 
 sub queue_refresh {
     return if $BLOCK_ALL;
     Irssi::timeout_remove($globTime)
 	    if defined $globTime; # delay the update further
     $globTime = Irssi::timeout_add_once(GLOB_QUEUE_TIMER, 'awl_refresh', undef);
 }
 
 sub awl_init {
     termsize_changed();
     update_keymap();
 }
 
 sub runsub {
     my $cmd = shift;
     sub {
 	my ($data, $server, $item) = @_;
 	Irssi::command_runsub($cmd, $data, $server, $item);
     };
 }
 
 Irssi::signal_register({
     'gui mouse' => [qw/int int int int int int/],
    });
 { my $broken_expandos = (Irssi::version >= 20081128 && Irssi::version < 20110210)
       ? sub { my $x = shift; $x =~ s/\$\{cumode_space\}/ /; $x } : undef;
   Irssi::theme_register([
     map { $broken_expandos ? $broken_expandos->($_) : $_ }
     set 'display_nokey'		=>   '$N${cumode_space}$H$C$S',
     set 'display_key'		=>   '$Q${cumode_space}$H$C$S',
     set 'display_nokey_visible' => '%2$N${cumode_space}$H$C$S',
     set 'display_key_visible'	=> '%2$Q${cumode_space}$H$C$S',
     set 'display_nokey_active'	=> '%1$N${cumode_space}$H$C$S',
     set 'display_key_active'	=> '%1$Q${cumode_space}$H$C$S',
     set 'display_header'	=> '%8$C|${N}',
     set 'name_display'		=> '$0',
     set 'separator'		=> ' ',
     set 'separator2'		=> '',
     set 'abbrev_chars'		=> "~\x{301c}",
     set 'viewer_item_bg'	=> sb_format_expand('{sb_background}'),
     set 'title'			=> '\V'.setc().'\:',
    ]);
 }
 Irssi::settings_add_bool(setc, set 'prefer_name',    0); #
 Irssi::settings_add_int( setc, set 'hide_empty',     0); #
 Irssi::settings_add_int( setc, set 'hide_data',      0); #
 Irssi::settings_add_int( setc, set 'hide_name_data', 0); #
 Irssi::settings_add_int( setc, set 'maxlines',       9); #
 Irssi::settings_add_int( setc, set 'maxcolumns',     4); #
 Irssi::settings_add_int( setc, set 'block',          15); #
 Irssi::settings_add_bool(setc, set 'sbar_maxlength', 1); #
 Irssi::settings_add_int( setc, set 'height_adjust',  2); #
 Irssi::settings_add_str( setc, set 'sort',           'refnum'); #
 Irssi::settings_add_str( setc, set 'placement',      'bottom'); #
 Irssi::settings_add_int( setc, set 'position',       0); #
 Irssi::settings_add_bool(setc, set 'all_disable',    1); #
 Irssi::settings_add_bool(setc, set 'viewer',         1); #
 Irssi::settings_add_str( setc, set 'shared_sbar',    'OFF'); #
 Irssi::settings_add_bool(setc, set 'mouse',          0); #
 Irssi::settings_add_str( setc, set 'path', Irssi::get_irssi_dir . '/_windowlist'); #
 Irssi::settings_add_str( setc, set 'custom_xform',   ''); #
 Irssi::settings_add_time(setc, set 'last_line_shade', '0'); #
 Irssi::settings_add_int( setc, set 'mouse_offset',   1); #
 Irssi::settings_add_int( setc, 'mouse_scroll',       3); #
 Irssi::settings_add_int( setc, 'mouse_escape',       1); #
 Irssi::settings_add_str( setc, 'banned_channels',    '');
 Irssi::settings_add_bool(setc, 'banned_channels_on', 1);
 Irssi::settings_add_str( setc, 'fancy_abbrev',       'fancy'); #
 Irssi::settings_add_bool(setc, set 'no_mode_hint',   0); #
 Irssi::settings_add_bool(setc, set 'viewer_launch',  1); #
 Irssi::settings_add_str( setc, set 'viewer_launch_env',  ''); #
 Irssi::settings_add_str( setc, set 'viewer_tmux_position',  'left'); #
 Irssi::settings_add_str( setc, set 'viewer_xwin_command',  'xterm +sb -e %A'); #
 Irssi::settings_add_str( setc, set 'viewer_custom_command',  ''); #
 
 Irssi::signal_add_last({
     'setup changed'    => 'setup_changed',
     'print text'       => 'addPrintTextHook',
     'terminal resized' => 'termsize_changed',
     'setup reread'     => 'screenFullRedraw',
     'window hilight'   => 'wl_changed',
     'command format'   => 'wl_changed',
 });
 Irssi::signal_add({
     'window changed'	       => 'window_changed',
     'window item changed'      => 'wl_changed',
     'window changed automatic' => 'window_changed',
     'window created'	       => 'awins_changed',
     'window destroyed'	       => 'awins_changed',
     'window name changed'      => 'wl_changed',
     'window refnum changed'    => 'wl_changed',
 });
 Irssi::signal_add_last('gui mouse' => 'mouse_escape');
 Irssi::signal_add_last('gui mouse' => 'mouse_scroll_event');
 Irssi::signal_add_last('gui mouse' => 'awl_mouse_event');
 Irssi::command_bind( setc() => runsub(setc()) );
 Irssi::command_bind( setc() . ' redraw' => 'screenFullRedraw' );
 Irssi::command_bind( setc() . ' restart' => 'restartViewerServer' );
 
 {
     my $l = set 'shared';
     {
 	no strict 'refs';
 	*{$l} = $awl_shared_empty;
     }
     Irssi::statusbar_item_register($l, '$0', $l);
 }
 
 awl_init();
 
 # Mouse script based on irssi mouse patch by mirage
 { my $mouse_status = -1; # -1:off 0,1,2:filling mouse_combo
   my @mouse_combo; # 0:button 1:x 2:y
   my @mouse_previous; # previous contents of mouse_combo
 
   sub mouse_xterm_off {
       $mouse_status = -1;
   }
   sub mouse_xterm {
       $mouse_status = 0;
       Irssi::timeout_add_once(10, 'mouse_xterm_off', undef);
   }
 
   sub mouse_key_hook {
       my ($key) = @_;
       if ($mouse_status != -1) {
 	  if ($mouse_status == 0) {
 	      @mouse_previous = @mouse_combo;
 		  #if @mouse_combo && $mouse_combo[0] < 64;
 	  }
 	  $mouse_combo[$mouse_status] = $key - 32;
 	  $mouse_status++;
 	  if ($mouse_status == 3) {
 	      $mouse_status = -1;
 	      # match screen coordinates
 	      $mouse_combo[1]--;
 	      $mouse_combo[2]--;
 	      Irssi::signal_emit('gui mouse', @mouse_combo[0 .. 2], @mouse_previous[0 .. 2]);
 	  }
 	  Irssi::signal_stop;
       }
   }
 }
 
 sub string_LCSS {
     my $str = join "\0", @_;
     (sort { length $b <=> length $a } $str =~ /(?=(.+).*\0.*\1)/g)[0]
 }
 
 # workaround for issue #271
 { package Irssi::Nick }
 
 # workaround for issue #572
 @Irssi::UI::Exec::ISA = 'Irssi::Windowitem'
     if Irssi::version >= 20140822 && Irssi::version <= 20161101 && !@Irssi::UI::Exec::ISA;
 
 UNITCHECK
 { package AwlViewer;
   use strict;
   use warnings;
   no warnings 'redefine';
   use Encode;
   use IO::Socket::UNIX;
   use IO::Select;
   use List::Util qw(max);
   use constant BLOCK_SIZE => 1024;
   use constant RECONNECT_TIME => 5;
 
   my $sockpath;
 
   our $VERSION = '0.8';
 
   our ($got_int, $resized, $timeout);
 
   my %vars;
   my (%c2w, @seqlist);
   my %mouse_coords;
   my (@mouse, @last_mouse);
   my ($err, $sock, $loop);
   my ($keybuf, $rcvbuf);
   my @screen;
   my ($screenHeight, $screenWidth);
   my ($disp_update, $fs_open, $one_shot_integration, $one_shot_resize);
   my $integration_position;
   my $show_title_bar;
 
   sub connect_it {
       $sock = IO::Socket::UNIX->new(
 	  Type => SOCK_STREAM,
 	  Peer => $sockpath,
 	 );
       unless ($sock) {
 	  $err = $!;
 	  return;
       }
       $sock->blocking(0);
       $loop->add($sock);
   }
 
   sub remove_conn {
       my $fh = shift;
       $loop->remove($fh);
       $fh->close;
       $sock = undef;
       %vars = ();
       @screen = ();
   }
 
   { package Terminfo; # xterm
     sub civis      { "\e[?25l" }
     sub sc	   { "\e7" }
     sub cup	   { "\e[" . ($_[0] + 1) . ';' . ($_[1] + 1) . 'H' }
     sub el	   { "\e[K" }
     sub rc	   { "\e8" }
     sub cnorm      { "\e[?25h" }
     sub setab      { "\e[4" . $_[0] . 'm' }
     sub setaf      { "\e[3" . $_[0] . 'm' }
     sub setaf16    { "\e[9" . $_[0] . 'm' }
     sub setab16    { "\e[10" . $_[0] . 'm' }
     sub setaf256   { "\e[38;5;" . $_[0] . 'm' }
     sub setab256   { "\e[48;5;" . $_[0] . 'm' }
     sub sgr0       { "\e[0m" }
     sub bold       { "\e[1m" }
     sub it         { "\e[3m" }
     sub ul         { "\e[4m" }
     sub blink      { "\e[5m" }
     sub rev	   { "\e[7m" }
     sub op	   { "\e[39;49m" }
     sub exit_bold  { "\e[22m" }
     sub exit_it    { "\e[23m" }
     sub exit_ul    { "\e[24m" }
     sub exit_blink { "\e[25m" }
     sub exit_rev   { "\e[27m" }
     sub smcup      { "\e[?1049h" }
     sub rmcup      { "\e[?1049l" }
     sub smmouse    { "\e[?1000h\e[?1005h" }
     sub rmmouse    { "\e[?1005l\e[?1000l" }
   }
 
   sub init {
       $sockpath = shift // "$ENV{HOME}/.irssi/_windowlist";
       STDOUT->autoflush(1);
       printf "\r%swaiting for %s...", Terminfo::sc, $::IRSSI{name};
 
       `stty -icanon -echo`;
 
       $loop = IO::Select->new;
       STDIN->blocking(0);
       $loop->add(\*STDIN);
 
       $SIG{INT} = sub {
 	  $got_int = 1
       };
       $SIG{WINCH} = sub {
 	  $resized = 1
       };
 
       $resized = 3;
 
       $disp_update = 2;
 
       $show_title_bar = 1;
   }
 
   sub enter_fs {
       return if $fs_open;
       safe_print(Terminfo::rc, Terminfo::smcup, Terminfo::civis, Terminfo::smmouse);
       $fs_open = 1;
   }
 
   sub leave_fs {
       return unless $fs_open;
       safe_print(Terminfo::rmmouse, Terminfo::cnorm, Terminfo::rmcup);
       safe_print(sprintf "\r%swaiting for %s...", Terminfo::sc, $::IRSSI{name}) if $_[0];
 
       $fs_open = 0;
   }
 
   sub end_prog {
       leave_fs();
       STDIN->blocking(1);
       `stty sane`;
       printf "\r%s%sthanks for using %s\n", Terminfo::rc, Terminfo::el, $::IRSSI{name};
   }
 
   sub safe_print {
       my $st = STDIN->blocking(1);
       print @_;
       STDIN->blocking($st);
   }
 
   sub safe_qx {
       my $st = STDIN->blocking(1);
       my $ret = `$_[0]`;
       STDIN->blocking($st);
       $ret
   }
 
   sub safe_print_sock {
       return unless $sock;
       my $was = $sock->blocking(1);
       $sock->print(@_);
       $sock->blocking($was);
   }
 
   sub process_recv {
       my $need = 0;
       while ($rcvbuf =~ s/\n(.+)_BEGIN\n((?: .*\n)*)\1_END\n//) {
 	  my $var = lc $1;
 	  my $data = $2;
 	  my @data = split "\n ", "\n$data ", -1;
 	  shift @data; pop @data;
 	  my $itembg = $vars{itembg};
 	  if ($var =~ s/list$//) {
 	      $vars{$var} = \@data;
 	  }
 	  elsif ($var =~ s/map$//) {
 	      $vars{$var} = +{ @data };
 	  }
 	  else {
 	      $vars{$var} = join "\n", @data;
 	  }
 	  $need = 1 if $var eq 'win';
 	  $need = 1 if $var eq 'redraw' && $vars{$var};
 	  if (($itembg//'') ne ($vars{itembg}//'')) {
 	      $need = $vars{redraw} = 1;
 	  }
 	  _build_keymap() if $var eq 'key2';
       }
       $need
   }
 
   { my %ansi_table;
     my ($i, $j, $k) = (0, 0, 0);
     my %term_state;
     sub reset_term_state { my %old_term = %term_state; %term_state = (); %old_term }
     sub set_term_state { my %old_term = %term_state; %term_state = @_; %old_term }
     %ansi_table = (
 	# fe-common::core::formats.c:format_expand_styles
 	(map { my $t = $i++; ($_ => sub { my $n = $term_state{hicolor} ? \&Terminfo::setab16 : \&Terminfo::setab;
 					  $n->($t) }) } (split //, '01234567' )),
 	(map { my $t = $j++; ($_ => sub { my $n = $term_state{hicolor} ? \&Terminfo::setaf16 : \&Terminfo::setaf;
 					  $n->($t) }) } (split //, 'krgybmcw' )),
 	(map { my $t = $k++; ($_ => sub { my $n = $term_state{hicolor} ? \&Terminfo::setaf : \&Terminfo::setaf16;
 					  $n->($t) }) } (split //, 'KRGYBMCW')),
 	# reset
 	n => sub { $term_state{hicolor} = 0; my $r = Terminfo::op;
 		   for (qw(blink rev bold)) {
 		       $r .= Terminfo->can("exit_$_")->() if delete $term_state{$_};
 		   }
 		   {
 		       local $ansi_table{n} = $ansi_table{N};
 		       $r .= formats_to_ansi_basic($vars{itembg});
 		   }
 		   $r
 	       },
 	N => sub { reset_term_state(); Terminfo::sgr0 },
 	# flash/bright
 	F => sub { my $n = 'blink'; my $e = ($term_state{$n} ^= 1) ? $n : "exit_$n"; Terminfo->can($e)->() },
 	# reverse
 	8 => sub { my $n = 'rev'; my $e = ($term_state{$n} ^= 1) ? $n : "exit_$n"; Terminfo->can($e)->() },
 	# bold
 	"_" => sub { my $n = 'bold'; my $e = ($term_state{$n} ^= 1) ? $n : "exit_$n"; Terminfo->can($e)->() },
 	# underline
 	U => sub { my $n = 'ul'; my $e = ($term_state{$n} ^= 1) ? $n : "exit_$n"; Terminfo->can($e)->() },
 	# italic
 	I => sub { my $n = 'it'; my $e = ($term_state{$n} ^= 1) ? $n : "exit_$n"; Terminfo->can($e)->() },
 	# bold, used as colour modifier if AWL_HI9 is set
 	9 => $ENV{AWL_HI9} ? sub { $term_state{hicolor} ^= 1; '' }
 	    : sub { my $n = 'bold'; my $e = ($term_state{$n} ^= 1) ? $n : "exit_$n"; Terminfo->can($e)->() },
 	#      delete                other stuff
 	(map { $_ => sub { '' } } (split //, ':|>#[')),
 	#      escape
 	(map { my $close = $_; $_ => sub { $close } } (split //, '{}%')),
        );
     for my $base (0 .. 15) {
 	my $close = $base;
 	my $idx = ($close&8) | ($close&4)>>2 | ($close&2) | ($close&1)<<2;
 	$ansi_table{ (sprintf "x0%x", $close) } =
 	    $ansi_table{ (sprintf "x0%X", $close) } =
 		sub { Terminfo::setab256($idx) };
 	$ansi_table{ (sprintf "X0%x", $close) } =
 	    $ansi_table{ (sprintf "X0%X", $close) } =
 		sub { Terminfo::setaf256($idx) };
     }
     for my $plane (1 .. 6) {
 	for my $coord (0 .. 35) {
 	    my $close = 16 + ($plane-1) * 36 + $coord;
 	    my $ch = $coord < 10 ? $coord : chr( $coord - 10 + ord 'a' );
 	    $ansi_table{ "x$plane$ch" } =
 		$ansi_table{ "x$plane\U$ch" } =
 		    sub { Terminfo::setab256($close) };
 	    $ansi_table{ "X$plane$ch" } =
 		$ansi_table{ "X$plane\U$ch" } =
 		    sub { Terminfo::setaf256($close) };
 	}
     }
     for my $gray (0 .. 23) {
 	my $close = 232 + $gray;
 	my $ch = chr( $gray + ord 'a' );
 	$ansi_table{ "x7$ch" } =
 	    $ansi_table{ "x7\U$ch" } =
 		sub { Terminfo::setab256($close) };
 	$ansi_table{ "X7$ch" } =
 	    $ansi_table{ "X7\U$ch" } =
 		sub { Terminfo::setaf256($close) };
     }
     sub formats_to_ansi_basic {
 	my $o = shift;
 	$o =~ s/(%(X..|x..|.))/exists $ansi_table{$2} ? $ansi_table{$2}->() : $1/gex;
 	$o
     }
   }
 
   sub _header {
       my $str = $vars{title} // uc ::setc();
       my $ccs = qr/%(?:X(?:[1-6][0-9A-Z]|7[A-X])|[0-9BCFGIKMNRUWY_])/i;
       (my $stripstr = $str) =~ s/($ccs)//g;
       my $space = int( ((abs $vars{block}) - length $stripstr) / (1 + length $stripstr));
       if ($space > 0) {
 	  my $ss = ' ' x $space;
 	  my @x = $str =~ /((?:$ccs)*\X(?:(?:$ccs)*$)?)/g;
 	  $str = join $ss, '', @x, '';
       }
       ($stripstr = $str) =~ s/($ccs)//g;
       my $pad = max 0, (abs $vars{block}) - length $stripstr;
       $str = ' ' x ($pad/2) . $str . ' ' x ($pad/2 + $pad%2);
       $str
   }
 
   sub _add_item {
       my ($i, $j, $c, $wi, $screen, $mouse) = @_;
       $screen->[$i][$j] = "%N%n$wi";
       if (exists $vars{mouse}{$c - 1}) {
 	  $mouse->[$i][$j] = $vars{mouse}{$c - 1};
       }
   }
   sub update_screen {
       $disp_update = 0;
       unless ($sock && exists $vars{seplen} && exists $vars{block}) {
 	  leave_fs(1);
 	  return;
       }
       enter_fs();
       @screen = () if delete $vars{redraw};
       %mouse_coords = ();
       my $ncols = ($vars{seplen} + abs $vars{block}) ?
 	  int( ($screenWidth + $vars{seplen}) / ($vars{seplen} + abs $vars{block}) ) : 0;
       my $xenl = ($vars{seplen} + abs $vars{block})
 	  && $ncols > int( ($screenWidth + $vars{seplen} - 1) / ($vars{seplen} + abs $vars{block}) );
       my $nrows = $screenHeight - $vars{ha};
       my @wi = @{$vars{win}//[]};
       my $max_items = $ncols * $nrows;
       my $c = $show_title_bar ? 1 : 0;
       my $items = @wi + $c;
       my $titems = $items > $max_items ? $max_items : $items;
       my $i = 0;
       my $j = 0;
       my @new_screen;
       my @new_mouse;
       $new_screen[0][0] = _header() #. ' ' x $vars{seplen}
 	  if $show_title_bar;
       unless ($nrows > $ncols) { # line layout
 	  ++$j if $show_title_bar;
 	  for my $wi (@wi) {
 	      if ($j >= $ncols) {
 		  $j = 0;
 		  ++$i;
 	      }
 	      last if $i >= $nrows;
 	      _add_item($i, $j, $show_title_bar ? $c : $c + 1,
 			$wi, \@new_screen, \@new_mouse);
 	      if ($c + 1 < $titems && $j + 1 < $ncols) {
 		  $new_screen[$i][$j] .= $vars{separator};
 	      }
 	      ++$j;
 	      ++$c;
 	  }
       }
       else { # column layout
 	  ++$i if $show_title_bar;
 	  for my $wi (@wi) {
 	      if ($i >= $nrows) {
 		  $i = 0;
 		  ++$j;
 	      }
 	      last if $j >= $ncols;
 	      _add_item($i, $j, $show_title_bar ? $c : $c + 1,
 			$wi, \@new_screen, \@new_mouse);
 	      if ($c + $nrows < $titems) {
 		  $new_screen[$i][$j] .= $vars{separator};
 	      }
 	      ++$i;
 	      ++$c;
 	  }
       }
       my $step = $vars{seplen} + abs $vars{block};
       $i = 0;
       my $str = Terminfo::sc . Terminfo::sgr0;
       for (my $i = 0; $i < @new_screen; ++$i) {
 	  for (my $j = 0; $j < @{$new_screen[$i]}; ++$j) {
 	      if (defined $new_mouse[$i] && defined $new_mouse[$i][$j]) {
 		  my $from = $j * $step;
 		  $mouse_coords{$i}{$_} = $new_mouse[$i][$j]
 		      for $from .. $from + abs $vars{block};
 	      }
 	      next if defined $screen[$i] && defined $screen[$i][$j]
 		  && $screen[$i][$j] eq $new_screen[$i][$j];
 	      $str .= Terminfo::cup($i, $j * $step)
 		   .  formats_to_ansi_basic($new_screen[$i][$j])
 		   .  Terminfo::sgr0;
 	      $str .= Terminfo::el if $j == $#{$new_screen[$i]} && (!$xenl || $j + 1 != $ncols);
 	  }
       }
       for (@new_screen .. $screenHeight - 1) {
 	  if (!@screen || defined $screen[$_]) {
 	      $str .= Terminfo::cup($_, 0) . Terminfo::sgr0 . Terminfo::el;
 	  }
       }
       $str .= Terminfo::rc;
       safe_print $str;
       @screen = @new_screen;
   }
 
   sub handle_resize {
       if (defined (my $r = safe_qx('stty size'))) {
 	  ($screenHeight, $screenWidth) = split ' ', $r;
 	  $resized = 0;
 	  @screen = ();
 	  $disp_update = 1;
 	  if ($one_shot_integration == 2) {
 	      $one_shot_resize--;
 	  }
       }
       else {
       }
   }
 
   sub _build_keymap {
       %c2w = reverse( %{$vars{key}}, %{$vars{key2}} );
       if (!grep { /^[+-]./ } keys %c2w) {
 	  %c2w = (%c2w, map { ("-$_" => $c2w{$_}) } grep { !/^\^./ } keys %c2w);
       }
       %c2w = map {
 	  my $key = $_;
 	  s{^(-)?(\+)?(\^)?(.)}{
 	      join '', (
 		  ($1 ? "\e" : ''),
 		  ($2 ? "\e\e" : ''),
 		  ($3 ? "$4"^"@" : $4)
 		 )
 	  }e;
 	  $_ => $c2w{$key}
       } keys %c2w;
       @seqlist = sort { length $b <=> length $a } keys %c2w;
   }
 
   sub _match_tmux {
       length $ENV{TMUX} && exists $vars{irssienv}{tmux_srv} && length $vars{irssienv}{tmux_pane}
 	  && $ENV{TMUX} eq $vars{irssienv}{tmux_srv}
   }
 
   sub process_keys {
       Encode::_utf8_on($keybuf);
       my $win;
       my $use_mouse;
       my $maybe;
   KEY: while (length $keybuf && !$maybe) {
 	  $maybe = 0;
 	  if ($keybuf =~ s/^\e\[M(.)(.)(.)//) {
 	      @last_mouse = @mouse;# if @mouse && $mouse[0] < 64;
 	      @mouse = map { -32 + ord } ($1, $2, $3);
 	      $use_mouse = 1;
 	      next KEY;
 	  }
 	  for my $s (@seqlist) {
 	      if ($keybuf =~ s/^\Q$s//) {
 		  $win = $c2w{$s};
 		  $use_mouse = 0;
 		  next KEY;
 	      }
 	      elsif (length $keybuf < length $s && $s =~ /^\Q$keybuf/) {
 		  $maybe = 1;
 	      }
 	  }
 	  unless ($maybe) {
 	      substr $keybuf, 0, 1, '';
 	  }
       }
       if ($use_mouse && @mouse && @last_mouse &&
 	      $mouse[2] == $last_mouse[2] &&
 		  $mouse[1] == $last_mouse[1] &&
 		      ($mouse[0] == 3 || $mouse[0] == 64 || $mouse[0] == 65)) {
 	  if ($mouse[0] == 64) {
 	      $win = 'up';
 	  }
 	  elsif ($mouse[0] == 65) {
 	      $win = 'down';
 	  }
 	  elsif (exists $mouse_coords{$mouse[2] - 1}{$mouse[1] - 1}) {
 	      $win = $mouse_coords{$mouse[2] - 1}{$mouse[1] - 1};
 	  }
 	  elsif ($mouse[2] == 1 && $mouse[1] <= abs $vars{block}) {
 	      $win = $last_mouse[0] != 0 ? 'last' : 'active';
 	  }
 	  else {
 	  }
       }
       if (defined $win) {
 	  $win =~ s/^_//;
 	  safe_print_sock("$win\n");
 	  if (!exists $ENV{AWL_AUTOFOCUS} || $ENV{AWL_AUTOFOCUS}) {
 	      if (_match_tmux()) {
 		  safe_qx("tmux selectp -t $vars{irssienv}{tmux_pane} 2>&1");
 	      }
 	      elsif (exists $vars{irssienv}{xwinid}) {
 		  safe_qx("wmctrl -ia $vars{irssienv}{xwinid} 2>/dev/null");
 	      }
 	  }
       }
       Encode::_utf8_off($keybuf);
   }
 
   sub check_integration {
       return unless $vars{irssienv};
       return unless $sock && exists $vars{seplen} && exists $vars{block};
       if ($one_shot_integration == 1) {
 	  my $nrows = $screenHeight - $vars{ha};
 	  my $ncols = ($vars{seplen} + abs $vars{block}) ? int( ($screenWidth + $vars{seplen}) / ($vars{seplen} + abs $vars{block}) ) : 0;
 	  my $items = ($show_title_bar ? 1 : 0) + @{$vars{win}//[]};
 	  my $dcols_required = $nrows ? int($items/$nrows) + !!($items%$nrows) : 0;
 	  my $rows_required = $ncols ? int($items/$ncols) + !!($items%$ncols) : 0;
 	  $rows_required = abs $vars{ml}
 	      if ($vars{ml} < 0 || ($vars{ml} > 0 && $rows_required > $vars{ml}));
 	  $dcols_required = abs $vars{mc}
 	      if ($vars{mc} < 0 || ($vars{mc} > 0 && $dcols_required > $vars{mc}));
 	  my $rows = $rows_required + $vars{ha};
 	  my $cols = ($dcols_required * ($vars{seplen} + abs $vars{block})) - $vars{seplen};
 	  if (_match_tmux()) {
 	      # int( ($screenWidth + $vars{seplen}) / ($vars{seplen} + abs $vars{block}) );
 	      my ($pos_flag, $before);
 	      if ($integration_position eq 'left') {
 		  $pos_flag = 'h';
 		  $before = 1;
 	      }
 	      elsif ($integration_position eq 'top') {
 		  $pos_flag = 'v';
 		  $before = 1;
 	      }
 	      elsif ($integration_position eq 'right') {
 		  $pos_flag = 'h';
 	      }
 	      else {
 		  $pos_flag = 'v';
 	      }
 	      my @cmd = "joinp -d$pos_flag -s $ENV{TMUX_PANE} -t $vars{irssienv}{tmux_pane}";
 	      push @cmd, "swapp -d -t $ENV{TMUX_PANE} -s $vars{irssienv}{tmux_pane}"
 		  if $before;
 	      $cols = max($cols, 2);
 	      $rows = max($rows, 2);
 
 	      safe_qx("tmux " . (join " \\\; ", @cmd) . " 2>&1");
 	  }
 	  else {
 	      $resized = 1;
 	      #safe_qx("resize -s $screenHeight $cols 2>&1")
 		#  if $cols > 0;
 	  }
 	  $one_shot_integration++;
 	  if ($resized == 1) {
 	      handle_resize();
 	      resize_integration();
 	  }
       }
       elsif ($one_shot_integration == 2) {
 	  resize_integration(1);
       }
   }
 
   sub resize_integration {
       return unless $one_shot_integration;
       return unless ($one_shot_resize//0) < 0 || shift;
       my $nrows = $screenHeight - $vars{ha};
       my $ncols = ($vars{seplen} + abs $vars{block}) ? int( ($screenWidth + $vars{seplen}) / ($vars{seplen} + abs $vars{block}) ) : 0;
       my $items = ($show_title_bar ? 1 : 0) + @{$vars{win}//[]};
       my $dcols_required = $nrows ? (int($items/$nrows) + !!($items%$nrows)) : 0;
       my $rows_required = $ncols ? int($items/$ncols) + !!($items%$ncols) : 0;
       $rows_required = abs $vars{ml}
 	  if ($vars{ml} < 0 || ($vars{ml} > 0 && $rows_required > $vars{ml}));
       $dcols_required = abs $vars{mc}
 	  if ($vars{mc} < 0 || ($vars{mc} > 0 && $dcols_required > $vars{mc}));
       my $rows = $rows_required + $vars{ha};
       my $cols = ($dcols_required * ($vars{seplen} + abs $vars{block})) - $vars{seplen};
       if (_match_tmux()) {
 	  my $pos_flag;
 	  my $before = 0;
 	  if ($integration_position eq 'left') {
 	      $pos_flag = 'h';
 	      $before = 1;
 	  }
 	  elsif ($integration_position eq 'top') {
 	      $pos_flag = 'v';
 	      $before = 1;
 	  }
 	  elsif ($integration_position eq 'right') {
 	      $pos_flag = 'h';
 	  }
 	  else {
 	      $pos_flag = 'v';
 	  }
 	  my @cmd;
 	  # hard tmux limits
 	  $cols = max($cols, 2);
 	  $rows = max($rows, 2);
 	  if ($pos_flag eq 'h' && $cols != $screenWidth) {
 	      my $change = $screenWidth - $cols;
 	      my $dir = ($before ^ ($change<0)) ? 'L' : 'R';
 	      push @cmd, "resizep -$dir -t $ENV{TMUX_PANE} @{[abs $change]}";
 	      #push @cmd, "resizep -x $cols -t $ENV{TMUX_PANE}";
 	      $one_shot_resize = 1;
 	  }
 	  if ($pos_flag eq 'v' && $rows != $screenHeight) {
 	      #push @cmd, "resizep -y $rows -t $ENV{TMUX_PANE}";
 	      my $change = $screenHeight - $rows;
 	      my $dir = ($before ^ ($change<0)) ? 'U' : 'D';
 	      push @cmd, "resizep -$dir -t $ENV{TMUX_PANE} @{[abs $change]}";
 	      $one_shot_resize = 1;
 	  }
 
 	  safe_qx("tmux " . (join " \\\; ", @cmd) . " 2>&1")
 	      if @cmd;
       }
       else {
 	  $cols = max($cols, 1);
 	  $rows = max($rows, 1);
 	  unless ($nrows > $ncols) { # line layout
 	      if ($rows != $screenHeight) {
 		  safe_qx("resize -s $rows $screenWidth 2>&1");
 		  $one_shot_resize = 1;
 	      }
 	  }
 	  else {
 	      if ($cols != $screenWidth) {
 		  safe_qx("resize -s $screenHeight $cols 2>&1");
 		  $one_shot_resize = 1;
 	      }
 	  }
       }
       if ($resized == 1) {
 	  handle_resize();
       }
   }
 
   sub init_integration {
       return unless $one_shot_integration;
       if (_match_tmux()) {
       }
       else {
       }
       safe_print("\e]2;".(uc ::setc())."\e\\");
   }
 
   sub main {
       require Getopt::Std;
       my %opts;
       Getopt::Std::getopts('1p:', \%opts);
       my $one_shot = $opts{1};
       $integration_position = $opts{p};
       $one_shot_integration = 0+!!$one_shot;
       #shift if @_ && $_[0] eq '--';
       &init;
       $show_title_bar = 0 if $ENV{AWL_NOTITLE};
       init_integration();
       until ($got_int) {
 	  $timeout = undef;
 	  if ($resized) {
 	      if ($resized == 1) {
 		  $timeout = 1;
 		  $resized++;
 	      }
 	      else {
 		  handle_resize();
 		  resize_integration();
 	      }
 	  }
 	  unless ($sock || $timeout) {
 	      connect_it();
 	  }
 	  $timeout ||= RECONNECT_TIME unless $sock;
 	  update_screen() if $disp_update;
       SELECT: while (my @read = $loop->can_read($timeout)) {
 	      for my $fh (@read) {
 		  if ($fh == \*STDIN) {
 		      if (read STDIN, my $buf, BLOCK_SIZE) {
 			  do {
 			      $keybuf .= $buf;
 			  } while read STDIN, $buf, BLOCK_SIZE;
 		      }
 		      else {
 			  $got_int = 1;
 			  last SELECT;
 		      }
 		  }
 		  else {
 		      if ($fh->read(my $buf, BLOCK_SIZE)) {
 			  do {
 			      $rcvbuf .= $buf;
 			  } while $fh->read($buf, BLOCK_SIZE);
 		      }
 		      else {
 			  $disp_update = 1;
 			  remove_conn($fh);
 			  if ($one_shot) {
 			      $got_int = 1;
 			      last SELECT;
 			  }
 			  $timeout ||= RECONNECT_TIME;
 		      }
 		  }
 	      }
 	      $disp_update |= process_recv() if length $rcvbuf;
 	      process_keys() if length $keybuf;
 	      check_integration() if $one_shot;
 	      update_screen() if $disp_update;
 	  }
 	  continue {
 	  }
       }
       end_prog();
   }
 }
 
 1;
 
 # Changelog
 # =========
 # 1.4
 # - fix line wrapping in some themes, reported by justanotherbody
 # - fix named window key detection, reported by madduck
 # - make title (in viewer and shared_sbar) configurable
 #
 # 1.3 - workaround for irssi issue #572
 # 1.2 - new format to choose abbreviation character
 # 1.1 - infinite loop on shortening certain window names reported by Kalan
 #
 # 1.0
 # - new awl_viewer_launch setting and an array of related settings
 # - fixed regression bug /exec -interactive
 # - fixed some warnings in perl 5.10 reported by kl3
 # - workaround for crash due to infinite recursion in irssi's Perl
 #   error handling
 #
 # 0.9
 # - fix endless loop in awin detection code!
 # - correct colour swap in awl_viewer
 # - fix passing of alternate socket path to the viewer
 # - potential undefinedness in mouse refnum hinted at by Canopus
 # - fixed regression bug /exec -interactive
 # - add case-insensitive modifier to awl_sort
 # - run custom_xform on awl_prefer_name also
 # - avoid inconsistent active window state after awin detection
 #   reported by ss
 # - revert %9-hack in the viewer prompted by discussion with pierrot
 # - fix new warning in perl 5.22
 #
 # 0.8
 # - replace fifo mode with external viewer script
 # - remove bundled cpan modules
 # - work around bogus irssi warning
 # - improve mouse support
 # - workaround for broken cumode in irssi 0.8.15
 # - fix handling of non-meta windows (uninitialized warning)
 # - add 256 colour support, strip true colour codes
 # - fix totally bogus $N padding reported by Ed S.
 # - make /window goto #name mappings work but ignore non-existant ones
 # - improve incomplete reads reported by bcode
 # - fix single % in awl_viewer reported by bcode
 # - add support for key bindings by nike and ferret
 # - coerce utf8 key binds
 # - add settings: custom_xform, last_line_shade, hide_name_data
 # - abbreviations were broken in some cases
 # - fix some misuse of / as cmdchar in mouse script reported by bcode
 # - add shared status bar mode
 # - ${type} variables for custom_xform setting
 # - crash if custom_xform had runtime error
 # - update sorting documentation
 # - fix odd case in size calculation noted by lasers
 # - add missing font styles to the viewer reported by ishanyx
 # - add italic
 #
 # 0.7g
 # - remove screen support and replace it with fifo support
 # - add double-width support to the shortener
 # - correct documentation regarding $T vs. display_header
 # - add missing refresh for window item changed (thanks vague)
 # - add visible windows
 # - add exemptions for active window
 # - workaround for hiding the window changes from trackbar
 # - hack to force 16colours in screen mode
 # - remember last window (reported by earthnative)
 # - wrong window focus on new queries (reported by emsid)
 # - dataloss bug on trying to remember last window
 #
 # 0.6d+
 # - add support for network headers
 # - fixed regression bug /exec -interactive
 #
 # 0.6ca+
 # - add screen support (from nicklist.pl)
 # - names can now have a max length and window names can be used
 # - fixed a bug with block display in screen mode and status bar mode
 # - added space handling to ir_fe and removed it again
 # - now handling formats on my own
 # - started to work on $tag display
 # - added warning about missing sb_act_none abstract leading to
 # - display*active settings
 # - added warning about the bug in awl_display_(no)key_active settings
 # - mouse hack
 #
 # 0.5d
 # - add setting to also hide the last status bar if empty (awl_all_disable)
 # - reverted to old utf8 code to also calculate broken utf8 length correctly
 # - simplified dealing with status bars in wlreset
 # - added a little tweak for the renamed term_type somewhere after Irssi 0.8.9
 # - fixed bug in handling channel #$$
 # - reset background colour at the beginning of an entry
 #
 # 0.4d
 # - fixed order of disabling status bars
 # - several attempts at special chars, without any real success
 #   and much more weird new bugs caused by this
 # - setting to specify sort order
 # - reduced timeout values
 # - added awl_hide_data
 # - make it so the dynamic sub is actually deleted
 # - fix a bug with removing of the last separator
 # - take into consideration parse_special
 #
 # 0.3b
 # - automatically kill old status bars
 # - reset on /reload
 # - position/placement settings
 #
 # 0.2
 # - automated retrieval of key bindings (thanks grep.pl authors)
 # - improved removing of status bars
 # - got rid of status chop
 #
 # 0.1
 # - Based on chanact.pl which was apparently based on lightbar.c and
 #   nicklist.pl with various other ideas from random scripts.

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