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+use strict; # use warnings;
+
+# {{{ debug
+
+#BEGIN {
+# open STDERR, '>', '/home/ailin/wlstatwarnings';
+#};
+
+# FIXME COULD SOMEONE PLEASE TELL ME HOW TO SHUT UP
+#
+# ...
+# Variable "*" will not stay shared at (eval *) line *.
+# Variable "*" will not stay shared at (eval *) line *.
+# ...
+# Can't locate package Irssi::Nick for @Irssi::Irc::Nick::ISA at (eval *) line *.
+# ...
+#
+# THANKS
+
+# }}}
+
+# if you don't know how to operate folds, type zn
+
+# {{{ header
+
+use Irssi (); # which is the minimum required version of Irssi ?
+use Irssi::TextUI;
+
+use vars qw($VERSION %IRSSI);
+
+$VERSION = '0.6ca';
+%IRSSI = (
+ original_authors => q(BC-bd, Veli, Timo Sirainen, ).
+ q(Wouter Coekaerts, Jean-Yves Lefort), # (decadix)
+ original_contact => q(bd@bc-bd.org, veli@piipiip.net, tss@iki.fi, ).
+ q(wouter@coekaerts.be, jylefort@brutele.be),
+ authors => q(Nei),
+ contact => q(Nei @ anti@conference.jabber.teamidiot.de),
+ url => "http://anti.teamidiot.de/",
+ name => q(awl),
+ description => q(Adds a permanent advanced window list on the right or ).
+ q(in a statusbar.),
+ description2 => q(Based on chanact.pl which was apparently based on ).
+ q(lightbar.c and nicklist.pl with various other ideas ).
+ q(from random scripts.),
+ license => q(GNU GPLv2 or later),
+);
+
+# }}}
+
+# {{{ *** D O C U M E N T A T I O N ***
+
+# adapted by Nei
+
+###############
+# {{{ original comment
+# ###########
+# # Adds new powerful and customizable [Act: ...] item (chanelnames,modes,alias).
+# # Lets you give alias characters to windows so that you can select those with
+# # meta-<char>.
+# #
+# # for irssi 0.8.2 by bd@bc-bd.org
+# #
+# # inspired by chanlist.pl by 'cumol@hammerhart.de'
+# #
+# #########
+# # {{{ Contributors
+# #########
+# #
+# # veli@piipiip.net /window_alias code
+# # qrczak@knm.org.pl chanact_abbreviate_names
+# # qerub@home.se Extra chanact_show_mode and chanact_chop_status
+# # }}}
+# }}}
+#
+# {{{ FURTHER THANKS TO
+# ############
+# # buu, fxn, Somni, Khisanth, integral, tybalt89 for much support in any aspect perl
+# # and the channel in general ( #perl @ freenode ) and especially the ir_* functions
+# #
+# # Valentin 'senneth' Batz ( vb@g-23.org ) for the pointer to grep.pl, continuous support
+# # and help in digging up ir_strip_codes
+# #
+# # OnetrixNET technology networks for the debian environment
+# #
+# # Monkey-Pirate.com / Spaceman Spiff for the webspace
+# #
+# }}}
+
+######
+# {{{ M A I N P R O B L E M
+#####
+#
+# It is impossible to place the awl on a statusbar together with other items,
+# because I do not know how to calculate the size that it is going to get
+# granted, and therefore I cannot do the linebreaks properly.
+# This is what is missing to make a nice script out of awl.
+# If you have any ideas, please contact me ASAP :).
+# }}}
+######
+
+######
+# {{{ UTF-8 PROBLEM
+#####
+#
+# Please help me find a solution to this:
+# this be your statusbar, it is using up the maximum term size
+# [[1=1]#abc [2=2]#defghi]
+#
+# now consider this example:i
+# "ascii" characters are marked with ., utf-8 characters with *
+# [[1=1]#... [2=2]#...***]
+#
+# you should think that this is how it would be displayed? WRONG!
+# [[1=1]#... [2=2]#...*** ]
+#
+# this is what Irssi does.. I believe my length calculating code to be correct,
+# however, I'd love to be proven wrong (or receive any other fix, too, of
+# course!)
+# }}}
+######
+
+#########
+# {{{ USAGE
+###
+#
+# copy the script to ~/.irssi/scripts/
+#
+# In irssi:
+#
+# /script load awl
+#
+#
+# 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
+########
+#
+# {{{ /set awl_display_nokey <string>
+# /set awl_display_key <string>
+# /set awl_display_nokey_active <string>
+# /set awl_display_key_active <string>
+# * string : Format String for one window. The following $'s are expanded:
+# $C : Name
+# $N : Number of the Window
+# $Q : meta-Keymap
+# $H : Start highlighting
+# $S : Stop highlighting
+# /+++++++++++++++++++++++++++++++++,
+# | **** I M P O R T A N T : **** |
+# | |
+# | don't forget to use $S if you |
+# | used $H before! |
+# | |
+# '+++++++++++++++++++++++++++++++++/
+# XXX NOTE ON *_active: there is a BUG somewhere in the length
+# XXX calculation. currently it's best to NOT remove $H/$S from those
+# XXX settings if you use it in the non-active settings.
+# }}}
+# {{{ /set awl_separator <string>
+# * string : Charater to use between the channel entries
+# you'll need to escape " " space and "$" like this:
+# "/set awl_separator \ "
+# "/set awl_separator \$"
+# and {}% like this:
+# "/set awl_separator %{"
+# "/set awl_separator %}"
+# "/set awl_separator %%"
+# (reason being, that the separator is used inside a {format })
+# }}}
+# {{{ /set awl_prefer_name <ON|OFF>
+# * this setting decides whether awl will use the active_name (OFF) or the
+# window name as the name/caption in awl_display_*.
+# That way you can rename windows using /window name myownname.
+# }}}
+# {{{ /set awl_hide_data <num>
+# * num : hide the window if its data_level is below num
+# set it to 0 to basically disable this feature,
+# 1 if you don't want windows without activity to be shown
+# 2 to show only those windows with channel text or hilight
+# 3 to show only windows with hilight
+# }}}
+# {{{ /set awl_maxlines <num>
+# * num : number of lines to use for the window list (0 to disable, negative
+# lock)
+# }}}
+# {{{ /set awl_columns <num>
+# * num : number of columns to use in screen mode (0 for unlimited)
+# }}}
+# {{{ /set awl_block <num>
+# * num : width of a column in screen mode (negative values = block display)
+# /+++++++++++++++++++++++++++++++++,
+# | ****** W A R N I N G ! ****** |
+# | |
+# | If your block display looks |
+# | DISTORTED, you need to add the |
+# | following line to your .theme |
+# | file under |
+# | abstracts = { : |
+# | |
+# | sb_act_none = "%n$*"; |
+# | |
+# '+++++++++++++++++++++++++++++++++/
+#.02:08:26. < shi> Irssi::current_theme()->get_format <.. can this be used?
+# }}}
+# {{{ /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 statusbar mode too.
+# }}}
+# {{{ /set awl_height_adjust <num>
+# * num : how many lines to leave empty in screen 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
+# }}}
+# {{{ /set awl_placement <top|bottom>
+# /set awl_position <num>
+# * these settings correspond to /statusbar because awl will create
+# statusbars 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 statusbar it created if it is empty.
+# As you might guess, this only makes sense with awl_hide_data > 0 ;)
+# }}}
+# {{{ /set awl_automode <sbar|screen|emulate_lightbar>
+# * this setting defines whether the window list is shown in statusbars or
+# whether the screen hack is used (from nicklist.pl)
+# }}}
+# }}}
+##########
+# {{{ COMMANDS
+########
+# {{{ /awl paste <ON|OFF|TOGGLE>
+# * enables or disables the screen hack windowlist. This is useful when you
+# want to mark & copy text that you want to paste somewhere (hence the
+# name). (ON means AWL disabled!)
+# This is nicely bound to a function key for example.
+# }}}
+# {{{ /awl redraw
+# * redraws the screen hack windowlist. There are many occasions where the
+# screen hack windowlist can get destroyed so you can use this command to
+# fix it.
+# }}}
+# }}}
+###
+# {{{ WISHES
+####
+#
+# if you fiddle with my mess, provide me with your fixes so I can benefit as well
+#
+# Nei =^.^= ( anti@conference.jabber.teamidiot.de )
+# }}}
+
+# }}}
+
+# {{{ modules
+
+#use Class::Classless;
+#use Term::Info;
+
+# }}}
+
+# {{{ global variables
+
+my $replaces = '[=]'; # AARGH!!! (chars that are always surrounded by weird
+ # colour codes by Irssi)
+
+my $actString = []; # statusbar texts
+my $currentLines = 0;
+my $resetNeeded; # layout/screen has changed, redo everything
+my $needRemake; # "normal" changes
+#my $callcount = 0;
+sub GLOB_QUEUE_TIMER () { 100 }
+my $globTime = undef; # timer to limit remake() calls
+
+
+my $SCREEN_MODE;
+my $DISABLE_SCREEN_TEMP;
+my $currentColumns = 0;
+my $screenResizing;
+my ($screenHeight, $screenWidth);
+my $screenansi = bless {
+ NAME => 'Screen::ANSI',
+ PARENTS => [],
+ METHODS => {
+ dcs => sub { "\033P" },
+ st => sub { "\033\\"},
+ }
+}, 'Class::Classless::X';
+#my $terminfo = new Term::Info 'xterm'; # xterm here, make this modular
+# {{{{{{{{{{{{{{{
+my $terminfo = bless { # xterm here, make this modular
+ NAME => 'Term::Info::xterm',
+ PARENTS => [],
+ METHODS => {
+ # civis=\E[?25l,
+ civis => sub { "\033[?25l" },
+ # sc=\E7,
+ sc => sub { "\0337" },
+ # cup=\E[%i%p1%d;%p2%dH,
+ cup => sub { shift;shift; "\033[" . ($_[0] + 1) . ';' . ($_[1] + 1) . 'H' },
+ # el=\E[K,
+ el => sub { "\033[K" },
+ # rc=\E8,
+ rc => sub { "\0338" },
+ # cnorm=\E[?25h,
+ cnorm => sub { "\033[?25h" },
+ # setab=\E[4%p1%dm,
+ setab => sub { shift;shift; "\033[4" . $_[0] . 'm' },
+ # setaf=\E[3%p1%dm,
+ setaf => sub { shift;shift; "\033[3" . $_[0] . 'm' },
+ # bold=\E[1m,
+ bold => sub { "\033[1m" },
+ # blink=\E[5m,
+ blink => sub { "\033[5m" },
+ # rev=\E[7m,
+ rev => sub { "\033[7m" },
+ # op=\E[39;49m,
+ op => sub { "\033[39;49m" },
+ }
+}, 'Class::Classless::X';
+# }}}}}}}}}}}}}}}
+
+
+sub setc () {
+ $IRSSI{'name'}
+}
+sub set ($) {
+ setc . '_' . shift
+}
+
+# }}}
+
+
+# {{{ sbar mode
+
+my %statusbars; # currently active statusbars
+
+# maybe I should just tie the array ?
+sub add_statusbar {
+ for (@_) {
+ # add subs
+ for my $l ($_) { {
+ no strict 'refs'; # :P
+ *{set$l} = sub { awl($l, @_) };
+ }; }
+ Irssi::command('statusbar ' . (set$_) . ' reset');
+ Irssi::command('statusbar ' . (set$_) . ' enable');
+ if (lc Irssi::settings_get_str(set 'placement') eq 'top') {
+ Irssi::command('statusbar ' . (set$_) . ' placement top');
+ }
+ if ((my $x = int Irssi::settings_get_int(set 'position')) != 0) {
+ Irssi::command('statusbar ' . (set$_) . ' position ' . $x);
+ }
+ Irssi::command('statusbar ' . (set$_) . ' add -priority 100 -alignment left barstart');
+ Irssi::command('statusbar ' . (set$_) . ' add ' . (set$_));
+ Irssi::command('statusbar ' . (set$_) . ' add -priority 100 -alignment right barend');
+ Irssi::command('statusbar ' . (set$_) . ' disable');
+ Irssi::statusbar_item_register(set$_, '$0', set$_);
+ $statusbars{$_} = {};
+ }
+}
+
+sub remove_statusbar {
+ for (@_) {
+ Irssi::command('statusbar ' . (set$_) . ' reset');
+ Irssi::statusbar_item_unregister(set$_); # XXX does this actually work ?
+ # DO NOT REMOVE the sub before you have unregistered it :))
+ for my $l ($_) { {
+ no strict 'refs';
+ undef &{set$l};
+ }; }
+ delete $statusbars{$_};
+ }
+}
+
+sub syncLines {
+ my $temp = $currentLines;
+ $currentLines = @$actString;
+ #Irssi::print("current lines: $temp new lines: $currentLines");
+ my $currMaxLines = Irssi::settings_get_int(set 'maxlines');
+ if ($currMaxLines > 0 and @$actString > $currMaxLines) {
+ $currentLines = $currMaxLines;
+ }
+ elsif ($currMaxLines < 0) {
+ $currentLines = abs($currMaxLines);
+ }
+ return if ($temp == $currentLines);
+ if ($currentLines > $temp) {
+ for ($temp .. ($currentLines - 1)) {
+ add_statusbar($_);
+ Irssi::command('statusbar ' . (set$_) . ' enable');
+ }
+ }
+ else {
+ for ($_ = ($temp - 1); $_ >= $currentLines; $_--) {
+ Irssi::command('statusbar ' . (set$_) . ' disable');
+ remove_statusbar($_);
+ }
+ }
+}
+
+# FIXME implement $get_size_only check, and user $item->{min|max-size} ??
+sub awl {
+ my ($line, $item, $get_size_only) = @_;
+
+ if ($needRemake) {
+ $needRemake = undef;
+ remake();
+ }
+
+ my $text = $actString->[$line]; # DO NOT set the actual $actString->[$line] to '' here or
+ $text = '' unless defined $text; # you'll screw up the statusbar counter ($currentLines)
+ $item->default_handler($get_size_only, $text, '', 1);
+}
+
+# remove old statusbars
+my %killBar;
+sub get_old_status {
+ my ($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{$1} = {}; }
+ Irssi::signal_stop();
+ }
+}
+sub killOldStatus {
+ %killBar = ();
+ Irssi::signal_add_first('print text' => 'get_old_status');
+ Irssi::command('statusbar');
+ Irssi::signal_remove('print text' => 'get_old_status');
+ remove_statusbar(keys %killBar);
+}
+#killOldStatus();
+
+# end sbar mode }}}
+
+
+# {{{ keymaps
+
+my %keymap;
+
+sub get_keymap {
+ my ($textDest, undef, $cont_stripped) = @_;
+ if ($textDest->{'level'} == 524288 and $textDest->{'target'} eq ''
+ and !defined($textDest->{'server'})
+ ) {
+ if ($cont_stripped =~ m/((?:meta-)+)(.)\s+change_window (\d+)/) {
+ my ($level, $key, $window) = ($1, $2, $3);
+ my $numlevel = ($level =~ y/-//) - 1;
+ $keymap{$window} = ('-' x $numlevel) . "$key";
+ }
+ Irssi::signal_stop();
+ }
+}
+
+sub update_keymap {
+ %keymap = ();
+ Irssi::signal_remove('command bind' => 'watch_keymap');
+ Irssi::signal_add_first('print text' => 'get_keymap');
+ Irssi::command('bind'); # stolen from grep
+ Irssi::signal_remove('print text' => 'get_keymap');
+ Irssi::signal_add('command bind' => 'watch_keymap');
+ Irssi::timeout_add_once(100, 'eventChanged', undef);
+}
+
+# watch keymap changes
+sub watch_keymap {
+ Irssi::timeout_add_once(1000, 'update_keymap', undef);
+}
+
+update_keymap();
+
+# end keymaps }}}
+
+# {{{ format handling
+
+# a bad way do do expansions but who cares
+sub expand {
+ my ($string, %format) = @_;
+ my ($exp, $repl);
+ $string =~ s/\$$exp/$repl/g while (($exp, $repl) = each(%format));
+ return $string;
+}
+
+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_8:|FnN>#[')),
+ # escape
+ (map { $_ => $_ } (split //, '{}%')),
+);
+sub ir_strip_codes { # strip %codes
+ my $o = shift;
+ $o =~ s/(%(.))/exists $strip_table{$2} ? $strip_table{$2} : $1/gex;
+ $o
+}
+
+sub ir_parse_special {
+ my $o; my $i = shift;
+ #if ($_[0]) { # for the future?!?
+ # eval {
+ # $o = $_[0]->parse_special($i);
+ # };
+ # unless ($@) {
+ # return $o;
+ # }
+ #}
+ my $win = shift || Irssi::active_win();
+ my $server = Irssi::active_server();
+ if (ref $win and ref $win->{'active'}) {
+ $o = $win->{'active'}->parse_special($i);
+ }
+ elsif (ref $win and ref $win->{'active_server'}) {
+ $o = $win->{'active_server'}->parse_special($i);
+ }
+ elsif (ref $server) {
+ $o = $server->parse_special($i);
+ }
+ else {
+ $o = Irssi::parse_special($i);
+ }
+ $o
+}
+sub ir_parse_special_protected {
+ my $o; my $i = shift;
+ $i =~ s/
+ ( \\. ) | # skip over escapes (maybe)
+ ( \$[^% $\]+ ) # catch special variables
+ /
+ if ($1) { $1 }
+ elsif ($2) { my $i2 = $2; ir_fe(ir_parse_special($i2, @_)) }
+ else { $& }
+ /gex;
+ $i
+}
+
+
+sub sb_ctfe { # Irssi::current_theme->format_expand wrapper
+ Irssi::current_theme->format_expand(
+ shift,
+ (
+ Irssi::EXPAND_FLAG_IGNORE_REPLACES
+ |
+ ($_[0]?0:Irssi::EXPAND_FLAG_IGNORE_EMPTY)
+ )
+ )
+}
+sub sb_expand { # expand {format }s (and apply parse_special for $vars)
+ ir_parse_special(
+ sb_ctfe(shift)
+ )
+}
+sub sb_strip {
+ ir_strip_codes(
+ sb_expand(shift)
+ ); # does this get us the actual length of that s*ty bar :P ?
+}
+sub sb_length {
+ # unicode cludge, d*mn broken Irssi
+ # screw it, this will fail from broken joining anyway (and cause warnings)
+ my $term_type = 'term_type';
+ if (Irssi::version > 20040819) { # this is probably wrong, but I don't know
+ # when the setting name got changed
+ $term_type = 'term_charset';
+ }
+ #if (lc Irssi::settings_get_str($term_type) eq '8bit'
+ # or Irssi::settings_get_str($term_type) =~ /^iso/i
+ #) {
+ # length(sb_strip(shift))
+ #}
+ #else {
+ my $temp = sb_strip(shift);
+ # try to get the displayed width
+ my $length;
+ eval {
+ require Text::CharWidth;
+ $length = Text::CharWidth::mbswidth($temp);
+ };
+ unless ($@) {
+ return $length;
+ }
+ else {
+ if (lc Irssi::settings_get_str($term_type) eq 'utf-8') {
+ # try to switch on utf8
+ eval {
+ no warnings;
+ require Encode;
+ #$temp = Encode::decode_utf8($temp); # thanks for the hint, but I have my
+ # # reasons for _utf8_on
+ Encode::_utf8_on($temp);
+ };
+ }
+ # there is nothing more I can do
+ length($temp)
+ }
+ #}
+}
+
+# !!! G*DD*MN Irssi is adding an additional layer of backslashitis per { } layer
+# !!! AND I still don't know what I need to escape.
+# !!! and NOONE else seems to know or care either.
+# !!! f*ck open source. I mean it.
+# XXX any Irssi::print debug statement leads to SEGFAULT - why ?
+
+# major parts of the idea by buu (#perl @ freenode)
+# thanks to fxn and Somni for debugging
+# while ($_[0] =~ /(.)/g) {
+# my $c = $1; # XXX sooo... goto kills $1
+# if ($q eq '%') { goto ESC; }
+
+## <freenode:#perl:tybalt89> s/%(.)|(\{)|(\})|(\\|\$)/$1?$1:$2?($level++,$2):$3?($level>$min_level&&$level--,$3):'\\'x(2**$level-1).$4/ge; # untested...
+sub ir_escape {
+ my $min_level = $_[1] || 0; my $level = $min_level;
+ my $o = shift;
+ $o =~ s/
+ ( %. ) | # $1
+ ( \{ ) | # $2
+ ( \} ) | # $3
+ ( \\ ) | # $4
+ ( \$(?=[^\\]) ) | # $5
+ ( \$ ) # $6
+ /
+ if ($1) { $1 } # %. escape
+ elsif ($2) { $level++; $2 } # { nesting start
+ elsif ($3) { if ($level > $min_level) { $level--; } $3 } # } nesting end
+ elsif ($4) { '\\'x(2**$level) } # \ needs \\escaping
+ elsif ($5) { '\\'x(2**$level-1) . '$' . '\\'x(2**$level-1) } # and $ needs even more because of "parse_special"
+ else { '\\'x(2**$level-1) . '$' } # $ needs \$ escaping
+ /gex;
+ $o
+}
+#sub ir_escape {
+# my $min_level = $_[1] || 0; my $level = $min_level;
+# my $o = shift;
+# $o =~ s/
+# ( %. ) | # $1
+# ( \{ ) | # $2
+# ( \} ) | # $3
+# ( \\ | \$ ) # $4
+# /
+# if ($1) { $1 } # %. escape
+# elsif ($2) { $level++; $2 } # { nesting start
+# elsif ($3) { if ($level > $min_level) { $level--; } $3 } # } nesting end
+# else { '\\'x(2**($level-1)-1) . $4 } # \ or $ needs \\escaping
+# /gex;
+# $o
+#}
+
+sub ir_fe { # try to fix format stuff
+ my $x = shift;
+ # XXX why do I have to use two/four % here instead of one/two ??
+ # answer: you screwed up in ir_escape
+ $x =~ s/([%{}])/%$1/g;
+ #$x =~ s/(\\|\$|[ ])/\\$1/g; # XXX HOW CAN I HANDLE THE SPACES CORRECTLY XXX
+ $x =~ s/(\\|\$)/\\$1/g;
+ #$x =~ s/(\$(?=.))|(\$)/$1?"\\\$\\":"\\\$"/ge; # I think this should be here
+ # # (logic), but it doesn't work
+ # # that way :P
+ #$x =~ s/\\/\\\\/g; # that's right, escape escapes
+ $x
+}
+sub ir_ve { # escapes special vars but leave colours alone
+ my $x = shift;
+ #$x =~ s/([%{}])/%$1/g;
+ $x =~ s/(\\|\$|[ ])/\\$1/g;
+ $x
+}
+
+my %ansi_table;
+{
+ my ($i, $j, $k) = (0, 0, 0);
+ %ansi_table = (
+ # fe-common::core::formats.c:format_expand_styles
+ # do format_backs
+ (map { $_ => $terminfo->setab($i++) } (split //, '01234567' )),
+ # do format_fores
+ (map { $_ => $terminfo->setaf($j++) } (split //, 'krgybmcw' )),
+ # do bold_fores
+ (map { $_ => $terminfo->bold() .
+ $terminfo->setaf($k++) } (split //, 'KRGYBMCW')),
+ # reset
+ #(map { $_ => $terminfo->op() } (split //, 'nN')),
+ (map { $_ => $terminfo->op() } (split //, 'n')),
+ (map { $_ => "\033[0m" } (split //, 'N')), # XXX quick and DIRTY
+ # flash/bright
+ F => $terminfo->blink(),
+ # reverse
+ 8 => $terminfo->rev(),
+ # bold
+ (map { $_ => $terminfo->bold() } (split //, '9_')),
+ # delete other stuff
+ (map { $_ => '' } (split //, ':|>#[')),
+ # escape
+ (map { $_ => $_ } (split //, '{}%')),
+ )
+}
+sub formats_to_ansi_basic {
+ my $o = shift;
+ $o =~ s/(%(.))/exists $ansi_table{$2} ? $ansi_table{$2} : $1/gex;
+ $o
+}
+
+sub lc1459 ($) { my $x = shift; $x =~ y/A-Z][\^/a-z}{|~/; $x }
+Irssi::settings_add_str(setc, 'banned_channels', '');
+Irssi::settings_add_bool(setc, 'banned_channels_on', 0);
+my %banned_channels = map { lc1459($_) => undef }
+split ' ', Irssi::settings_get_str('banned_channels');
+Irssi::settings_add_str(setc, 'fancy_abbrev', 'fancy');
+
+# }}}
+
+# {{{ main
+
+sub remake () {
+ #$callcount++;
+ #my $xx = $callcount; Irssi::print("starting remake [ $xx ]");
+ my ($hilight, $number, $display);
+ my $separator = '{sb_act_sep ' . Irssi::settings_get_str(set 'separator') .
+ '}';
+ my $custSort = Irssi::settings_get_str(set 'sort');
+ my $custSortDir = 1;
+ if ($custSort =~ /^[-!](.*)/) {
+ $custSortDir = -1;
+ $custSort = $1;
+ }
+
+ my @wins =
+ sort {
+ (
+ ( (int($a->{$custSort}) <=> int($b->{$custSort})) * $custSortDir )
+ ||
+ ($a->{'refnum'} <=> $b->{'refnum'})
+ )
+ } Irssi::windows;
+ my $block = Irssi::settings_get_int(set 'block');
+ my $columns = $currentColumns;
+ my $oldActString = $actString if $SCREEN_MODE;
+ $actString = $SCREEN_MODE ? [' A W L'] : [];
+ my $line = $SCREEN_MODE ? 1 : 0;
+ my $width = $SCREEN_MODE
+ ?
+ $screenWidth - abs($block)*$columns + 1
+ :
+ ([Irssi::windows]->[0]{'width'} - sb_length('{sb x}'));
+ my $height = $screenHeight - abs(Irssi::settings_get_int(set
+ 'height_adjust'));
+ my ($numPad, $keyPad) = (0, 0);
+ my %abbrevList;
+ if ($SCREEN_MODE or Irssi::settings_get_bool(set 'sbar_maxlength')
+ or ($block < 0)
+ ) {
+ %abbrevList = ();
+ if (Irssi::settings_get_str('fancy_abbrev') !~ /^(no|off|head)/i) {
+ my @nameList = map { ref $_ ? $_->get_active_name : '' } @wins;
+ for (my $i = 0; $i < @nameList - 1; ++$i) {
+ my ($x, $y) = ($nameList[$i], $nameList[$i + 1]);
+ for ($x, $y) { s/^[+#!=]// }
+ my $res = Algorithm::LCSS::LCSS($x, $y);
+ if (defined $res) {
+ #Irssi::print("common pattern $x $y : $res");
+ #Irssi::print("found at $nameList[$i] ".index($nameList[$i],
+ # $res));
+ $abbrevList{$nameList[$i]} = int (index($nameList[$i], $res) +
+ (length($res) / 2));
+ #Irssi::print("found at ".$nameList[$i+1]." ".index($nameList[$i+1],
+ # $res));
+ $abbrevList{$nameList[$i+1]} = int (index($nameList[$i+1], $res) +
+ (length($res) / 2));
+ }
+ }
+ }
+ if ($SCREEN_MODE or ($block < 0)) {
+ $numPad = length((sort { length($b) <=> length($a) } keys %keymap)[0]);
+ $keyPad = length((sort { length($b) <=> length($a) } values %keymap)[0]);
+ }
+ }
+ if ($SCREEN_MODE) {
+ print STDERR $screenansi->dcs().
+ $terminfo->civis().
+ $terminfo->sc().
+ $screenansi->st();
+ if (@$oldActString < 1) {
+ print STDERR $screenansi->dcs().
+ $terminfo->cup(0, $width).
+ $actString->[0].
+ $terminfo->el().
+ $screenansi->st();
+ }
+ }
+ foreach my $win (@wins) {
+ unless ($SCREEN_MODE) {
+ $actString->[$line] = '' unless defined $actString->[$line]
+ or Irssi::settings_get_bool(set 'all_disable');
+ }
+
+ # all stolen from chanact, what does this code do and why do we need it ?
+ !ref($win) && next;
+
+ my $name = $win->get_active_name;
+ $name = '*' if (Irssi::settings_get_bool('banned_channels_on') and exists
+ $banned_channels{lc1459($name)});
+ $name = $win->{'name'} if $name ne '*' and $win->{'name'} ne ''
+ and Irssi::settings_get_bool(set 'prefer_name');
+ my $active = $win->{'active'};
+ my $colour = $win->{'hilight_color'};
+ if (!defined $colour) { $colour = ''; }
+
+ if ($win->{'data_level'} < Irssi::settings_get_int(set 'hide_data')) {
+ next; } # for Geert
+ if ($win->{'data_level'} == 0) { $hilight = '{sb_act_none '; }
+ elsif ($win->{'data_level'} == 1) { $hilight = '{sb_act_text '; }
+ elsif ($win->{'data_level'} == 2) { $hilight = '{sb_act_msg '; }
+ elsif ($colour ne '') { $hilight = "{sb_act_hilight_color $colour "; }
+ elsif ($win->{'data_level'} == 3) { $hilight = '{sb_act_hilight '; }
+ else { $hilight = '{sb_act_special '; }
+
+ $number = $win->{'refnum'};
+ my @display = ('display_nokey');
+ if (defined $keymap{$number} and $keymap{$number} ne '') {
+ unshift @display, map { (my $cpy = $_) =~ s/_no/_/; $cpy } @display;
+ }
+ if (Irssi::active_win->{'refnum'} == $number) {
+ unshift @display, map { my $cpy = $_; $cpy .= '_active'; $cpy } @display;
+ }
+ #Irssi::print("win $number [@display]: " . join '.', split //, join '<<', map {
+ # Irssi::settings_get_str(set $_) } @display);
+ $display = (grep { $_ }
+ map { Irssi::settings_get_str(set $_) }
+ @display)[0];
+ #Irssi::print("win $number : " . join '.', split //, $display);
+
+ if ($SCREEN_MODE or Irssi::settings_get_bool(set 'sbar_maxlength')
+ or ($block < 0)
+ ) {
+ my $baseLength = sb_length(ir_escape(ir_ve(ir_parse_special_protected(sb_ctfe(
+ '{sb_background}' . expand($display,
+ C => ir_fe('x'),
+ N => $number . (' 'x($numPad - length($number))),
+ Q => ir_fe((' 'x($keyPad - length($keymap{$number}))) . $keymap{$number}),
+ H => $hilight,
+ S => '}{sb_background}'
+ ), 1), $win)))) - 1;
+ my $diff = abs($block) - (length($name) + $baseLength);
+ if ($diff < 0) { # too long
+ if (abs($diff) >= length($name)) { $name = '' } # forget it
+ elsif (abs($diff) + 1 >= length($name)) { $name = substr($name,
+ 0, 1); }
+ else {
+ my $middle = exists $abbrevList{$name} ?
+ (($abbrevList{$name} + (2*(length($name) / 2)))/3) :
+ ((Irssi::settings_get_str('fancy_abbrev') =~ /^head/i) ?
+ length($name) :
+ (length($name) / 2));
+ my $cut = int($middle - (abs($diff) / 2) + .55);
+ $cut = 1 if $cut < 1;
+ $cut = length($name) - abs($diff) - 1 if $cut > (length($name) -
+ abs($diff) - 1);
+ $name = substr($name, 0, $cut) . '~' . substr($name, $cut +
+ abs($diff) + 1);
+ }
+ }
+ elsif ($SCREEN_MODE or ($block < 0)) {
+ $name .= (' ' x $diff);
+ }
+ }
+
+ my $add = ir_ve(ir_parse_special_protected(sb_ctfe('{sb_background}' . expand($display,
+ C => ir_fe($name),
+ N => $number . (' 'x($numPad - length($number))),
+ Q => ir_fe((' 'x($keyPad - length($keymap{$number}))) . $keymap{$number}),
+ H => $hilight,
+ S => '}{sb_background}'
+ ), 1), $win));
+ if ($SCREEN_MODE) {
+ $actString->[$line] = $add;
+ if ((!defined $oldActString->[$line]
+ or $oldActString->[$line] ne $actString->[$line])
+ and
+ $line <= ($columns * $height)
+ ) {
+ print STDERR $screenansi->dcs().
+ $terminfo->cup(($line-1) % $height+1, $width + (
+ abs($block) * int(($line-1) / $height))).
+ formats_to_ansi_basic(sb_expand(ir_escape($actString->[$line]))).
+ #$terminfo->el().
+ $screenansi->st();
+ }
+ $line++;
+ }
+ else {
+ #$temp =~ s/\{\S+?(?:\s(.*?))?\}/$1/g;
+ #$temp =~ s/\\\\\\\\/\\/g; # XXX I'm actually guessing here, someone point me
+ # # XXX to docs please
+ $actString->[$line] = '' unless defined $actString->[$line];
+
+ # XXX how can I check whether the content still fits in the bar? this would
+ # XXX allow awlstatus to reside on a statusbar together with other items...
+ if (sb_length(ir_escape($actString->[$line] . $add)) >= $width) {
+ # XXX doesn't correctly handle utf-8 multibyte ... help !!?
+ $actString->[$line] .= ' ' x ($width - sb_length(ir_escape(
+ $actString->[$line])));
+ $line++;
+ }
+ $actString->[$line] .= $add . $separator;
+ # XXX if I use these prints, output layout gets screwed up... why ?
+ #Irssi::print("line $line: ".$actString->[$line]);
+ #Irssi::print("temp $line: ".$temp);
+ }
+ }
+
+ if ($SCREEN_MODE) {
+ while ($line <= ($columns * $height)) {
+ print STDERR $screenansi->dcs().
+ $terminfo->cup(($line-1) % $height+1, $width + (
+ abs($block) * int(($line-1) / $height))).
+ $terminfo->el().
+ $screenansi->st();
+ $line++;
+ }
+ print STDERR $screenansi->dcs().
+ $terminfo->rc().
+ $terminfo->cnorm().
+ $screenansi->st();
+ }
+ else {
+ # XXX the Irssi::print statements lead to the MOST WEIRD results
+ # e.g.: the loop gets executed TWICE for p > 0 ?!?
+ for (my $p = 0; $p < @$actString; $p++) { # wrap each line in {sb }, escape it
+ my $x = $actString->[$p]; # properly, etc.
+ $x =~ s/\Q$separator\E([ ]*)$/$1/;
+ #Irssi::print("[$p]".'current:'.join'.',split//,sb_strip(ir_escape($x,0)));
+ #Irssi::print("assumed length before:".sb_length(ir_escape($x,0)));
+ $x = "{sb $x}";
+ #Irssi::print("[$p]".'new:'.join'.',split//,sb_expand(ir_escape($x,0)));
+ #Irssi::print("[$p]".'new:'.join'.',split//,ir_escape($x,0));
+ #Irssi::print("assumed length after:".sb_length(ir_escape($x,0)));
+ $x = ir_escape($x);
+ #Irssi::print("[$p]".'REALnew:'.join'.',split//,sb_strip($x));
+ $actString->[$p] = $x;
+ # XXX any Irssi::print debug statement leads to SEGFAULT (sometimes) - why ?
+ }
+ }
+ #Irssi::print("remake [ $xx ] finished");
+}
+
+sub awlHasChanged () {
+ $globTime = undef;
+ my $temp = ($SCREEN_MODE ?
+ "\\\n" . Irssi::settings_get_int(set 'block').
+ Irssi::settings_get_int(set 'height_adjust')
+ : "!\n" . Irssi::settings_get_str(set 'placement').
+ Irssi::settings_get_int(set 'position')).
+ Irssi::settings_get_str(set 'automode');
+ if ($temp ne $resetNeeded) { wlreset(); return; }
+ #Irssi::print("awl has changed, calls to remake so far: $callcount");
+ $needRemake = 1;
+
+ #remake();
+ if (
+ ($SCREEN_MODE and !$DISABLE_SCREEN_TEMP)
+ or
+ ($needRemake and Irssi::settings_get_bool(set 'all_disable'))
+ or
+ (!Irssi::settings_get_bool(set 'all_disable') and $currentLines < 1)
+ ) {
+ $needRemake = undef;
+ remake();
+ }
+
+ unless ($SCREEN_MODE) {
+ # XXX Irssi crashes if I try to do this without timer, why ? What's the minimum
+ # XXX delay I need to use in the timer ?
+ Irssi::timeout_add_once(100, 'syncLines', undef);
+
+ for (keys %statusbars) {
+ Irssi::statusbar_items_redraw(set$_);
+ }
+ }
+ else {
+ Irssi::timeout_add_once(100, 'syncColumns', undef);
+ }
+}
+
+sub eventChanged () { # Implement a change queue/blocker -.-)
+ if (defined $globTime) {
+ Irssi::timeout_remove($globTime);
+ } # delay the update further
+ $globTime = Irssi::timeout_add_once(GLOB_QUEUE_TIMER, 'awlHasChanged', undef);
+}
+
+# }}}
+
+
+# {{{ screen mode
+
+sub screenFullRedraw {
+ my ($window) = @_;
+ if (!ref $window or $window->{'refnum'} == Irssi::active_win->{'refnum'}) {
+ $actString = [];
+ eventChanged();
+ }
+}
+
+sub screenSize { # from nicklist.pl
+ $screenResizing = 1;
+ # fit screen
+ system 'screen -x '.$ENV{'STY'}.' -X fit';
+ # get size
+ my ($row, $col) = split ' ', `stty size`;
+ # set screen width
+ $screenWidth = $col-1;
+ $screenHeight = $row-1;
+
+ # on some recent systems, "screen -X fit; screen -X width -w 50" doesn't work, needs a sleep in between the 2 commands
+ # so we wait a second before setting the width
+ Irssi::timeout_add_once(100, sub {
+ my ($new_irssi_width) = @_;
+ $new_irssi_width -= abs(Irssi::settings_get_int(set
+ 'block'))*$currentColumns - 1;
+ system 'screen -x '.$ENV{'STY'}.' -X width -w ' . $new_irssi_width;
+ # and then we wait another second for the resizing, and then redraw.
+ Irssi::timeout_add_once(10,sub {$screenResizing = 0; screenFullRedraw()}, []);
+ }, $screenWidth);
+}
+
+sub screenOff {
+ my ($unloadMode) = @_;
+ Irssi::signal_remove('gui print text finished' => 'screenFullRedraw');
+ Irssi::signal_remove('gui page scrolled' => 'screenFullRedraw');
+ Irssi::signal_remove('window changed' => 'screenFullRedraw');
+ Irssi::signal_remove('window changed automatic' => 'screenFullRedraw');
+ if ($unloadMode) {
+ Irssi::signal_remove('terminal resized' => 'resizeTerm');
+ }
+ system 'screen -x '.$ENV{'STY'}.' -X fit';
+}
+
+sub syncColumns {
+ return if (@$actString == 0);
+ my $temp = $currentColumns;
+ #Irssi::print("current columns $temp");
+ my $height = $screenHeight - abs(Irssi::settings_get_int(set
+ 'height_adjust'));
+ $currentColumns = int(($#$actString-1) / $height) + 1;
+ #Irssi::print("objects in actstring:".scalar(@$actString).", screen height:".
+ # $height);
+ my $currMaxColumns = Irssi::settings_get_int(set 'columns');
+ if ($currMaxColumns > 0 and $currentColumns > $currMaxColumns) {
+ $currentColumns = $currMaxColumns;
+ }
+ elsif ($currMaxColumns < 0) {
+ $currentColumns = abs($currMaxColumns);
+ }
+ return if ($temp == $currentColumns);
+ screenSize();
+}
+
+#$needRemake = 1;
+sub resizeTerm () {
+ if ($SCREEN_MODE and !$screenResizing) {
+ $screenResizing = 1;
+ Irssi::timeout_add_once(10, 'screenSize', undef);
+ }
+ Irssi::timeout_add_once(100, 'eventChanged', undef);
+}
+
+# }}}
+
+
+# {{{ settings add
+
+Irssi::settings_add_str(setc, set 'display_nokey', '[$N]$H$C$S');
+Irssi::settings_add_str(setc, set 'display_key', '[$Q=$N]$H$C$S');
+Irssi::settings_add_str(setc, set 'display_nokey_active', '');
+Irssi::settings_add_str(setc, set 'display_key_active', '');
+Irssi::settings_add_str(setc, set 'separator', "\\ ");
+Irssi::settings_add_bool(setc, set 'prefer_name', 0);
+Irssi::settings_add_int(setc, set 'hide_data', 0);
+Irssi::settings_add_int(setc, set 'maxlines', 9);
+Irssi::settings_add_int(setc, set 'columns', 1);
+Irssi::settings_add_int(setc, set 'block', 20);
+Irssi::settings_add_bool(setc, set 'sbar_maxlength', 0);
+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', 0);
+Irssi::settings_add_str(setc, set 'automode', 'sbar');
+
+# }}}
+
+
+# {{{ init
+
+sub wlreset {
+ $actString = [];
+ $currentLines = 0; # 1; # mhmmmm .. we actually enable one line down there so
+ # let's try this.
+ #update_keymap();
+ killOldStatus();
+ # Register statusbar
+ #add_statusbar(0);
+ #Irssi::command('statusbar wl0 enable');
+ my $was_screen_mode = $SCREEN_MODE;
+ if ($SCREEN_MODE = (Irssi::settings_get_str(set 'automode') =~ /screen/i)
+ and
+ !$was_screen_mode
+ ) {
+ if (!defined $ENV{'STY'}) {
+ Irssi::print('Screen mode can only be used in GNU screen but no '.
+ 'screen was found.', MSGLEVEL_CLIENTERROR);
+ $SCREEN_MODE = undef;
+ }
+ else {
+ Irssi::signal_add_last('gui print text finished' => 'screenFullRedraw');
+ Irssi::signal_add_last('gui page scrolled' => 'screenFullRedraw');
+ Irssi::signal_add('window changed' => 'screenFullRedraw');
+ Irssi::signal_add('window changed automatic' => 'screenFullRedraw');
+ }
+ }
+ elsif ($was_screen_mode and !$SCREEN_MODE) {
+ screenOff();
+ }
+ $resetNeeded = ($SCREEN_MODE ?
+ "\\\n" . Irssi::settings_get_int(set 'block').
+ Irssi::settings_get_int(set 'height_adjust')
+ : "!\n" . Irssi::settings_get_str(set 'placement').
+ Irssi::settings_get_int(set 'position')).
+ Irssi::settings_get_str(set 'automode');
+ resizeTerm();
+}
+
+wlreset();
+
+# }}}
+
+
+# {{{ unload/deinit
+
+my $Unload;
+sub unload ($$$) {
+ $Unload = 1;
+ # pretend we didn't do anything ASAP
+ Irssi::timeout_add_once(10, sub { $Unload = undef; }, undef);
+}
+# last try to catch a sigsegv
+Irssi::signal_add_first('gui exit' => sub { $Unload = undef; });
+sub UNLOAD {
+ # this might well crash Irssi... try /eval /script unload someotherscript ;
+ # /quit (= SEGFAULT !)
+ if ($Unload) {
+ $actString = ['']; # syncLines(); # XXX Irssi crashes when trying to disable
+ killOldStatus(); # XXX all statusbars ?
+ if ($SCREEN_MODE) {
+ screenOff('unload mode');
+ }
+ }
+}
+
+# }}}
+
+
+# {{{ signals
+
+sub addPrintTextHook { # update on print text
+ return if $_[0]->{'level'} == 262144 and $_[0]->{'target'} eq ''
+ and !defined($_[0]->{'server'});
+ if (Irssi::settings_get_str(set 'sort') =~ /^[-!]?last_line$/) {
+ Irssi::timeout_add_once(100, 'eventChanged', undef);
+ }
+}
+
+#sub _x { my ($x, $y) = @_; ($x, sub { Irssi::print('-->signal '.$x); eval "$y();"; }) }
+#sub _x { @_ }
+Irssi::signal_add_first(
+ 'command script unload' => 'unload'
+);
+Irssi::signal_add_last({
+ 'setup changed' => 'eventChanged',
+ 'print text' => 'addPrintTextHook',
+ 'terminal resized' => 'resizeTerm',
+ 'setup reread' => 'wlreset',
+ 'window hilight' => 'eventChanged',
+});
+Irssi::signal_add({
+ 'window created' => 'eventChanged',
+ 'window destroyed' => 'eventChanged',
+ 'window name changed' => 'eventChanged',
+ 'window refnum changed' => 'eventChanged',
+ 'window changed' => 'eventChanged',
+ 'window changed automatic' => 'eventChanged',
+});
+
+#Irssi::signal_add('nick mode changed', 'chanactHasChanged'); # relicts
+
+# }}}
+
+# {{{ commands
+
+
+sub runsub {
+ my ($cmd) = @_;
+ sub {
+ my ($data, $server, $item) = @_;
+ Irssi::command_runsub($cmd, $data, $server, $item);
+ };
+}
+Irssi::command_bind( setc() => runsub(setc()) );
+Irssi::command_bind( setc() . ' paste' => runsub(setc() . ' paste') );
+Irssi::command_bind(
+ setc() . ' paste on' => sub {
+ return unless $SCREEN_MODE;
+ my $was_disabled = $DISABLE_SCREEN_TEMP;
+ $DISABLE_SCREEN_TEMP = 1;
+ Irssi::print('Paste mode is now ON, '.uc(setc()).' is temporarily '.
+ 'disabled.');
+ if (!$was_disabled) {
+ $screenResizing = 1;
+ screenOff();
+ }
+ }
+);
+Irssi::command_bind(
+ setc() . ' paste off' => sub {
+ return unless $SCREEN_MODE;
+ my $was_disabled = $DISABLE_SCREEN_TEMP;
+ $DISABLE_SCREEN_TEMP = undef;
+ Irssi::print('Paste mode is now OFF, '.uc(setc()).' is enabled.');
+ if ($was_disabled) {
+ $SCREEN_MODE = undef;
+ $screenResizing = 0;
+ wlreset();
+ }
+ }
+);
+Irssi::command_bind(
+ setc() . ' paste toggle' => sub {
+ if ($DISABLE_SCREEN_TEMP) {
+ Irssi::command(setc() . ' paste off');
+ }
+ else {
+ Irssi::command(setc() . ' paste on');
+ }
+ }
+);
+Irssi::command_bind(
+ setc() . ' redraw' => sub {
+ return unless $SCREEN_MODE;
+ screenFullRedraw();
+ }
+);
+
+
+# }}}
+
+# {{{ Algorithm::LCSS module
+{
+ package Algorithm::Diff;
+ # Skip to first "=head" line for documentation.
+ use strict;
+
+ use integer; # see below in _replaceNextLargerWith() for mod to make
+ # if you don't use this
+
+ # McIlroy-Hunt diff algorithm
+ # Adapted from the Smalltalk code of Mario I. Wolczko, <mario@wolczko.com>
+ # by Ned Konz, perl@bike-nomad.com
+ # Updates by Tye McQueen, http://perlmonks.org/?node=tye
+
+ # Create a hash that maps each element of $aCollection to the set of
+ # positions it occupies in $aCollection, restricted to the elements
+ # within the range of indexes specified by $start and $end.
+ # The fourth parameter is a subroutine reference that will be called to
+ # generate a string to use as a key.
+ # Additional parameters, if any, will be passed to this subroutine.
+ #
+ # my $hashRef = _withPositionsOfInInterval( \@array, $start, $end, $keyGen );
+
+ sub _withPositionsOfInInterval
+ {
+ my $aCollection = shift; # array ref
+ my $start = shift;
+ my $end = shift;
+ my $keyGen = shift;
+ my %d;
+ my $index;
+ for ( $index = $start ; $index <= $end ; $index++ )
+ {
+ my $element = $aCollection->[$index];
+ my $key = &$keyGen( $element, @_ );
+ if ( exists( $d{$key} ) )
+ {
+ unshift ( @{ $d{$key} }, $index );
+ }
+ else
+ {
+ $d{$key} = [$index];
+ }
+ }
+ return wantarray ? %d : \%d;
+ }
+
+ # Find the place at which aValue would normally be inserted into the
+ # array. If that place is already occupied by aValue, do nothing, and
+ # return undef. If the place does not exist (i.e., it is off the end of
+ # the array), add it to the end, otherwise replace the element at that
+ # point with aValue. It is assumed that the array's values are numeric.
+ # This is where the bulk (75%) of the time is spent in this module, so
+ # try to make it fast!
+
+ sub _replaceNextLargerWith
+ {
+ my ( $array, $aValue, $high ) = @_;
+ $high ||= $#$array;
+
+ # off the end?
+ if ( $high == -1 || $aValue > $array->[-1] )
+ {
+ push ( @$array, $aValue );
+ return $high + 1;
+ }
+
+ # binary search for insertion point...
+ my $low = 0;
+ my $index;
+ my $found;
+ while ( $low <= $high )
+ {
+ $index = ( $high + $low ) / 2;
+
+ # $index = int(( $high + $low ) / 2); # without 'use integer'
+ $found = $array->[$index];
+
+ if ( $aValue == $found )
+ {
+ return undef;
+ }
+ elsif ( $aValue > $found )
+ {
+ $low = $index + 1;
+ }
+ else
+ {
+ $high = $index - 1;
+ }
+ }
+
+ # now insertion point is in $low.
+ $array->[$low] = $aValue; # overwrite next larger
+ return $low;
+ }
+
+ # This method computes the longest common subsequence in $a and $b.
+
+ # Result is array or ref, whose contents is such that
+ # $a->[ $i ] == $b->[ $result[ $i ] ]
+ # foreach $i in ( 0 .. $#result ) if $result[ $i ] is defined.
+
+ # An additional argument may be passed; this is a hash or key generating
+ # function that should return a string that uniquely identifies the given
+ # element. It should be the case that if the key is the same, the elements
+ # will compare the same. If this parameter is undef or missing, the key
+ # will be the element as a string.
+
+ # By default, comparisons will use "eq" and elements will be turned into keys
+ # using the default stringizing operator '""'.
+
+ # Additional parameters, if any, will be passed to the key generation
+ # routine.
+
+ sub _longestCommonSubsequence
+ {
+ my $a = shift; # array ref or hash ref
+ my $b = shift; # array ref or hash ref
+ my $counting = shift; # scalar
+ my $keyGen = shift; # code ref
+ my $compare; # code ref
+
+ if ( ref($a) eq 'HASH' )
+ { # prepared hash must be in $b
+ my $tmp = $b;
+ $b = $a;
+ $a = $tmp;
+ }
+
+ # Check for bogus (non-ref) argument values
+ if ( !ref($a) || !ref($b) )
+ {
+ my @callerInfo = caller(1);
+ die 'error: must pass array or hash references to ' . $callerInfo[3];
+ }
+
+ # set up code refs
+ # Note that these are optimized.
+ if ( !defined($keyGen) ) # optimize for strings
+ {
+ $keyGen = sub { $_[0] };
+ $compare = sub { my ( $a, $b ) = @_; $a eq $b };
+ }
+ else
+ {
+ $compare = sub {
+ my $a = shift;
+ my $b = shift;
+ &$keyGen( $a, @_ ) eq &$keyGen( $b, @_ );
+ };
+ }
+
+ my ( $aStart, $aFinish, $matchVector ) = ( 0, $#$a, [] );
+ my ( $prunedCount, $bMatches ) = ( 0, {} );
+
+ if ( ref($b) eq 'HASH' ) # was $bMatches prepared for us?
+ {
+ $bMatches = $b;
+ }
+ else
+ {
+ my ( $bStart, $bFinish ) = ( 0, $#$b );
+
+ # First we prune off any common elements at the beginning
+ while ( $aStart <= $aFinish
+ and $bStart <= $bFinish
+ and &$compare( $a->[$aStart], $b->[$bStart], @_ ) )
+ {
+ $matchVector->[ $aStart++ ] = $bStart++;
+ $prunedCount++;
+ }
+
+ # now the end
+ while ( $aStart <= $aFinish
+ and $bStart <= $bFinish
+ and &$compare( $a->[$aFinish], $b->[$bFinish], @_ ) )
+ {
+ $matchVector->[ $aFinish-- ] = $bFinish--;
+ $prunedCount++;
+ }
+
+ # Now compute the equivalence classes of positions of elements
+ $bMatches =
+ _withPositionsOfInInterval( $b, $bStart, $bFinish, $keyGen, @_ );
+ }
+ my $thresh = [];
+ my $links = [];
+
+ my ( $i, $ai, $j, $k );
+ for ( $i = $aStart ; $i <= $aFinish ; $i++ )
+ {
+ $ai = &$keyGen( $a->[$i], @_ );
+ if ( exists( $bMatches->{$ai} ) )
+ {
+ $k = 0;
+ for $j ( @{ $bMatches->{$ai} } )
+ {
+
+ # optimization: most of the time this will be true
+ if ( $k and $thresh->[$k] > $j and $thresh->[ $k - 1 ] < $j )
+ {
+ $thresh->[$k] = $j;
+ }
+ else
+ {
+ $k = _replaceNextLargerWith( $thresh, $j, $k );
+ }
+
+ # oddly, it's faster to always test this (CPU cache?).
+ if ( defined($k) )
+ {
+ $links->[$k] =
+ [ ( $k ? $links->[ $k - 1 ] : undef ), $i, $j ];
+ }
+ }
+ }
+ }
+
+ if (@$thresh)
+ {
+ return $prunedCount + @$thresh if $counting;
+ for ( my $link = $links->[$#$thresh] ; $link ; $link = $link->[0] )
+ {
+ $matchVector->[ $link->[1] ] = $link->[2];
+ }
+ }
+ elsif ($counting)
+ {
+ return $prunedCount;
+ }
+
+ return wantarray ? @$matchVector : $matchVector;
+ }
+
+ sub traverse_sequences
+ {
+ my $a = shift; # array ref
+ my $b = shift; # array ref
+ my $callbacks = shift || {};
+ my $keyGen = shift;
+ my $matchCallback = $callbacks->{'MATCH'} || sub { };
+ my $discardACallback = $callbacks->{'DISCARD_A'} || sub { };
+ my $finishedACallback = $callbacks->{'A_FINISHED'};
+ my $discardBCallback = $callbacks->{'DISCARD_B'} || sub { };
+ my $finishedBCallback = $callbacks->{'B_FINISHED'};
+ my $matchVector = _longestCommonSubsequence( $a, $b, 0, $keyGen, @_ );
+
+ # Process all the lines in @$matchVector
+ my $lastA = $#$a;
+ my $lastB = $#$b;
+ my $bi = 0;
+ my $ai;
+
+ for ( $ai = 0 ; $ai <= $#$matchVector ; $ai++ )
+ {
+ my $bLine = $matchVector->[$ai];
+ if ( defined($bLine) ) # matched
+ {
+ &$discardBCallback( $ai, $bi++, @_ ) while $bi < $bLine;
+ &$matchCallback( $ai, $bi++, @_ );
+ }
+ else
+ {
+ &$discardACallback( $ai, $bi, @_ );
+ }
+ }
+
+ # The last entry (if any) processed was a match.
+ # $ai and $bi point just past the last matching lines in their sequences.
+
+ while ( $ai <= $lastA or $bi <= $lastB )
+ {
+
+ # last A?
+ if ( $ai == $lastA + 1 and $bi <= $lastB )
+ {
+ if ( defined($finishedACallback) )
+ {
+ &$finishedACallback( $lastA, @_ );
+ $finishedACallback = undef;
+ }
+ else
+ {
+ &$discardBCallback( $ai, $bi++, @_ ) while $bi <= $lastB;
+ }
+ }
+
+ # last B?
+ if ( $bi == $lastB + 1 and $ai <= $lastA )
+ {
+ if ( defined($finishedBCallback) )
+ {
+ &$finishedBCallback( $lastB, @_ );
+ $finishedBCallback = undef;
+ }
+ else
+ {
+ &$discardACallback( $ai++, $bi, @_ ) while $ai <= $lastA;
+ }
+ }
+
+ &$discardACallback( $ai++, $bi, @_ ) if $ai <= $lastA;
+ &$discardBCallback( $ai, $bi++, @_ ) if $bi <= $lastB;
+ }
+
+ return 1;
+ }
+
+ sub traverse_balanced
+ {
+ my $a = shift; # array ref
+ my $b = shift; # array ref
+ my $callbacks = shift || {};
+ my $keyGen = shift;
+ my $matchCallback = $callbacks->{'MATCH'} || sub { };
+ my $discardACallback = $callbacks->{'DISCARD_A'} || sub { };
+ my $discardBCallback = $callbacks->{'DISCARD_B'} || sub { };
+ my $changeCallback = $callbacks->{'CHANGE'};
+ my $matchVector = _longestCommonSubsequence( $a, $b, 0, $keyGen, @_ );
+
+ # Process all the lines in match vector
+ my $lastA = $#$a;
+ my $lastB = $#$b;
+ my $bi = 0;
+ my $ai = 0;
+ my $ma = -1;
+ my $mb;
+
+ while (1)
+ {
+
+ # Find next match indices $ma and $mb
+ do {
+ $ma++;
+ } while(
+ $ma <= $#$matchVector
+ && !defined $matchVector->[$ma]
+ );
+
+ last if $ma > $#$matchVector; # end of matchVector?
+ $mb = $matchVector->[$ma];
+
+ # Proceed with discard a/b or change events until
+ # next match
+ while ( $ai < $ma || $bi < $mb )
+ {
+
+ if ( $ai < $ma && $bi < $mb )
+ {
+
+ # Change
+ if ( defined $changeCallback )
+ {
+ &$changeCallback( $ai++, $bi++, @_ );
+ }
+ else
+ {
+ &$discardACallback( $ai++, $bi, @_ );
+ &$discardBCallback( $ai, $bi++, @_ );
+ }
+ }
+ elsif ( $ai < $ma )
+ {
+ &$discardACallback( $ai++, $bi, @_ );
+ }
+ else
+ {
+
+ # $bi < $mb
+ &$discardBCallback( $ai, $bi++, @_ );
+ }
+ }
+
+ # Match
+ &$matchCallback( $ai++, $bi++, @_ );
+ }
+
+ while ( $ai <= $lastA || $bi <= $lastB )
+ {
+ if ( $ai <= $lastA && $bi <= $lastB )
+ {
+
+ # Change
+ if ( defined $changeCallback )
+ {
+ &$changeCallback( $ai++, $bi++, @_ );
+ }
+ else
+ {
+ &$discardACallback( $ai++, $bi, @_ );
+ &$discardBCallback( $ai, $bi++, @_ );
+ }
+ }
+ elsif ( $ai <= $lastA )
+ {
+ &$discardACallback( $ai++, $bi, @_ );
+ }
+ else
+ {
+
+ # $bi <= $lastB
+ &$discardBCallback( $ai, $bi++, @_ );
+ }
+ }
+
+ return 1;
+ }
+
+ sub prepare
+ {
+ my $a = shift; # array ref
+ my $keyGen = shift; # code ref
+
+ # set up code ref
+ $keyGen = sub { $_[0] } unless defined($keyGen);
+
+ return scalar _withPositionsOfInInterval( $a, 0, $#$a, $keyGen, @_ );
+ }
+
+ sub LCS
+ {
+ my $a = shift; # array ref
+ my $b = shift; # array ref or hash ref
+ my $matchVector = _longestCommonSubsequence( $a, $b, 0, @_ );
+ my @retval;
+ my $i;
+ for ( $i = 0 ; $i <= $#$matchVector ; $i++ )
+ {
+ if ( defined( $matchVector->[$i] ) )
+ {
+ push ( @retval, $a->[$i] );
+ }
+ }
+ return wantarray ? @retval : \@retval;
+ }
+
+ sub LCS_length
+ {
+ my $a = shift; # array ref
+ my $b = shift; # array ref or hash ref
+ return _longestCommonSubsequence( $a, $b, 1, @_ );
+ }
+
+ sub LCSidx
+ {
+ my $a= shift @_;
+ my $b= shift @_;
+ my $match= _longestCommonSubsequence( $a, $b, 0, @_ );
+ my @am= grep defined $match->[$_], 0..$#$match;
+ my @bm= @{$match}[@am];
+ return \@am, \@bm;
+ }
+
+ sub compact_diff
+ {
+ my $a= shift @_;
+ my $b= shift @_;
+ my( $am, $bm )= LCSidx( $a, $b, @_ );
+ my @cdiff;
+ my( $ai, $bi )= ( 0, 0 );
+ push @cdiff, $ai, $bi;
+ while( 1 ) {
+ while( @$am && $ai == $am->[0] && $bi == $bm->[0] ) {
+ shift @$am;
+ shift @$bm;
+ ++$ai, ++$bi;
+ }
+ push @cdiff, $ai, $bi;
+ last if ! @$am;
+ $ai = $am->[0];
+ $bi = $bm->[0];
+ push @cdiff, $ai, $bi;
+ }
+ push @cdiff, 0+@$a, 0+@$b
+ if $ai < @$a || $bi < @$b;
+ return wantarray ? @cdiff : \@cdiff;
+ }
+
+ sub diff
+ {
+ my $a = shift; # array ref
+ my $b = shift; # array ref
+ my $retval = [];
+ my $hunk = [];
+ my $discard = sub {
+ push @$hunk, [ '-', $_[0], $a->[ $_[0] ] ];
+ };
+ my $add = sub {
+ push @$hunk, [ '+', $_[1], $b->[ $_[1] ] ];
+ };
+ my $match = sub {
+ push @$retval, $hunk
+ if 0 < @$hunk;
+ $hunk = []
+ };
+ traverse_sequences( $a, $b,
+ { MATCH => $match, DISCARD_A => $discard, DISCARD_B => $add }, @_ );
+ &$match();
+ return wantarray ? @$retval : $retval;
+ }
+
+ sub sdiff
+ {
+ my $a = shift; # array ref
+ my $b = shift; # array ref
+ my $retval = [];
+ my $discard = sub { push ( @$retval, [ '-', $a->[ $_[0] ], "" ] ) };
+ my $add = sub { push ( @$retval, [ '+', "", $b->[ $_[1] ] ] ) };
+ my $change = sub {
+ push ( @$retval, [ 'c', $a->[ $_[0] ], $b->[ $_[1] ] ] );
+ };
+ my $match = sub {
+ push ( @$retval, [ 'u', $a->[ $_[0] ], $b->[ $_[1] ] ] );
+ };
+ traverse_balanced(
+ $a,
+ $b,
+ {
+ MATCH => $match,
+ DISCARD_A => $discard,
+ DISCARD_B => $add,
+ CHANGE => $change,
+ },
+ @_
+ );
+ return wantarray ? @$retval : $retval;
+ }
+
+ ########################################
+ my $Root= __PACKAGE__;
+ package Algorithm::Diff::_impl;
+ use strict;
+
+ sub _Idx() { 0 } # $me->[_Idx]: Ref to array of hunk indices
+ # 1 # $me->[1]: Ref to first sequence
+ # 2 # $me->[2]: Ref to second sequence
+ sub _End() { 3 } # $me->[_End]: Diff between forward and reverse pos
+ sub _Same() { 4 } # $me->[_Same]: 1 if pos 1 contains unchanged items
+ sub _Base() { 5 } # $me->[_Base]: Added to range's min and max
+ sub _Pos() { 6 } # $me->[_Pos]: Which hunk is currently selected
+ sub _Off() { 7 } # $me->[_Off]: Offset into _Idx for current position
+ sub _Min() { -2 } # Added to _Off to get min instead of max+1
+
+ sub Die
+ {
+ require Carp;
+ Carp::confess( @_ );
+ }
+
+ sub _ChkPos
+ {
+ my( $me )= @_;
+ return if $me->[_Pos];
+ my $meth= ( caller(1) )[3];
+ Die( "Called $meth on 'reset' object" );
+ }
+
+ sub _ChkSeq
+ {
+ my( $me, $seq )= @_;
+ return $seq + $me->[_Off]
+ if 1 == $seq || 2 == $seq;
+ my $meth= ( caller(1) )[3];
+ Die( "$meth: Invalid sequence number ($seq); must be 1 or 2" );
+ }
+
+ sub getObjPkg
+ {
+ my( $us )= @_;
+ return ref $us if ref $us;
+ return $us . "::_obj";
+ }
+
+ sub new
+ {
+ my( $us, $seq1, $seq2, $opts ) = @_;
+ my @args;
+ for( $opts->{keyGen} ) {
+ push @args, $_ if $_;
+ }
+ for( $opts->{keyGenArgs} ) {
+ push @args, @$_ if $_;
+ }
+ my $cdif= Algorithm::Diff::compact_diff( $seq1, $seq2, @args );
+ my $same= 1;
+ if( 0 == $cdif->[2] && 0 == $cdif->[3] ) {
+ $same= 0;
+ splice @$cdif, 0, 2;
+ }
+ my @obj= ( $cdif, $seq1, $seq2 );
+ $obj[_End] = (1+@$cdif)/2;
+ $obj[_Same] = $same;
+ $obj[_Base] = 0;
+ my $me = bless \@obj, $us->getObjPkg();
+ $me->Reset( 0 );
+ return $me;
+ }
+
+ sub Reset
+ {
+ my( $me, $pos )= @_;
+ $pos= int( $pos || 0 );
+ $pos += $me->[_End]
+ if $pos < 0;
+ $pos= 0
+ if $pos < 0 || $me->[_End] <= $pos;
+ $me->[_Pos]= $pos || !1;
+ $me->[_Off]= 2*$pos - 1;
+ return $me;
+ }
+
+ sub Base
+ {
+ my( $me, $base )= @_;
+ my $oldBase= $me->[_Base];
+ $me->[_Base]= 0+$base if defined $base;
+ return $oldBase;
+ }
+
+ sub Copy
+ {
+ my( $me, $pos, $base )= @_;
+ my @obj= @$me;
+ my $you= bless \@obj, ref($me);
+ $you->Reset( $pos ) if defined $pos;
+ $you->Base( $base );
+ return $you;
+ }
+
+ sub Next {
+ my( $me, $steps )= @_;
+ $steps= 1 if ! defined $steps;
+ if( $steps ) {
+ my $pos= $me->[_Pos];
+ my $new= $pos + $steps;
+ $new= 0 if $pos && $new < 0;
+ $me->Reset( $new )
+ }
+ return $me->[_Pos];
+ }
+
+ sub Prev {
+ my( $me, $steps )= @_;
+ $steps= 1 if ! defined $steps;
+ my $pos= $me->Next(-$steps);
+ $pos -= $me->[_End] if $pos;
+ return $pos;
+ }
+
+ sub Diff {
+ my( $me )= @_;
+ $me->_ChkPos();
+ return 0 if $me->[_Same] == ( 1 & $me->[_Pos] );
+ my $ret= 0;
+ my $off= $me->[_Off];
+ for my $seq ( 1, 2 ) {
+ $ret |= $seq
+ if $me->[_Idx][ $off + $seq + _Min ]
+ < $me->[_Idx][ $off + $seq ];
+ }
+ return $ret;
+ }
+
+ sub Min {
+ my( $me, $seq, $base )= @_;
+ $me->_ChkPos();
+ my $off= $me->_ChkSeq($seq);
+ $base= $me->[_Base] if !defined $base;
+ return $base + $me->[_Idx][ $off + _Min ];
+ }
+
+ sub Max {
+ my( $me, $seq, $base )= @_;
+ $me->_ChkPos();
+ my $off= $me->_ChkSeq($seq);
+ $base= $me->[_Base] if !defined $base;
+ return $base + $me->[_Idx][ $off ] -1;
+ }
+
+ sub Range {
+ my( $me, $seq, $base )= @_;
+ $me->_ChkPos();
+ my $off = $me->_ChkSeq($seq);
+ if( !wantarray ) {
+ return $me->[_Idx][ $off ]
+ - $me->[_Idx][ $off + _Min ];
+ }
+ $base= $me->[_Base] if !defined $base;
+ return ( $base + $me->[_Idx][ $off + _Min ] )
+ .. ( $base + $me->[_Idx][ $off ] - 1 );
+ }
+
+ sub Items {
+ my( $me, $seq )= @_;
+ $me->_ChkPos();
+ my $off = $me->_ChkSeq($seq);
+ if( !wantarray ) {
+ return $me->[_Idx][ $off ]
+ - $me->[_Idx][ $off + _Min ];
+ }
+ return
+ @{$me->[$seq]}[
+ $me->[_Idx][ $off + _Min ]
+ .. ( $me->[_Idx][ $off ] - 1 )
+ ];
+ }
+
+ sub Same {
+ my( $me )= @_;
+ $me->_ChkPos();
+ return wantarray ? () : 0
+ if $me->[_Same] != ( 1 & $me->[_Pos] );
+ return $me->Items(1);
+ }
+
+ my %getName;
+ %getName= (
+ same => \&Same,
+ diff => \&Diff,
+ base => \&Base,
+ min => \&Min,
+ max => \&Max,
+ range=> \&Range,
+ items=> \&Items, # same thing
+ );
+
+ sub Get
+ {
+ my $me= shift @_;
+ $me->_ChkPos();
+ my @value;
+ for my $arg ( @_ ) {
+ for my $word ( split ' ', $arg ) {
+ my $meth;
+ if( $word !~ /^(-?\d+)?([a-zA-Z]+)([12])?$/
+ || not $meth= $getName{ lc $2 }
+ ) {
+ Die( $Root, ", Get: Invalid request ($word)" );
+ }
+ my( $base, $name, $seq )= ( $1, $2, $3 );
+ push @value, scalar(
+ 4 == length($name)
+ ? $meth->( $me )
+ : $meth->( $me, $seq, $base )
+ );
+ }
+ }
+ if( wantarray ) {
+ return @value;
+ } elsif( 1 == @value ) {
+ return $value[0];
+ }
+ Die( 0+@value, " values requested from ",
+ $Root, "'s Get in scalar context" );
+ }
+
+
+ my $Obj= getObjPkg($Root);
+ no strict 'refs';
+
+ for my $meth ( qw( new getObjPkg ) ) {
+ *{$Root."::".$meth} = \&{$meth};
+ *{$Obj ."::".$meth} = \&{$meth};
+ }
+ for my $meth ( qw(
+ Next Prev Reset Copy Base Diff
+ Same Items Range Min Max Get
+ _ChkPos _ChkSeq
+ ) ) {
+ *{$Obj."::".$meth} = \&{$meth};
+ }
+
+};
+{
+ package Algorithm::LCSS;
+
+ use strict;
+ {
+ no strict 'refs';
+ *traverse_sequences = \&Algorithm::Diff::traverse_sequences;
+ }
+
+ sub _tokenize { [split //, $_[0]] }
+
+ sub CSS {
+ my $is_array = ref $_[0] eq 'ARRAY' ? 1 : 0;
+ my ( $seq1, $seq2, @match, $from_match );
+ my $i = 0;
+ if ( $is_array ) {
+ $seq1 = $_[0];
+ $seq2 = $_[1];
+ traverse_sequences( $seq1, $seq2, {
+ MATCH => sub { push @{$match[$i]}, $seq1->[$_[0]]; $from_match = 1 },
+ DISCARD_A => sub { do{$i++; $from_match = 0} if $from_match },
+ DISCARD_B => sub { do{$i++; $from_match = 0} if $from_match },
+ });
+ }
+ else {
+ $seq1 = _tokenize($_[0]);
+ $seq2 = _tokenize($_[1]);
+ traverse_sequences( $seq1, $seq2, {
+ MATCH => sub { $match[$i] .= $seq1->[$_[0]]; $from_match = 1 },
+ DISCARD_A => sub { do{$i++; $from_match = 0} if $from_match },
+ DISCARD_B => sub { do{$i++; $from_match = 0} if $from_match },
+ });
+ }
+ return \@match;
+ }
+
+ sub CSS_Sorted {
+ my $match = CSS(@_);
+ if ( ref $_[0] eq 'ARRAY' ) {
+ @$match = map{$_->[0]}sort{$b->[1]<=>$a->[1]}map{[$_,scalar(@$_)]}@$match
+ }
+ else {
+ @$match = map{$_->[0]}sort{$b->[1]<=>$a->[1]}map{[$_,length($_)]}@$match
+ }
+ return $match;
+ }
+
+ sub LCSS {
+ my $is_array = ref $_[0] eq 'ARRAY' ? 1 : 0;
+ my $css = CSS(@_);
+ my $index;
+ my $length = 0;
+ if ( $is_array ) {
+ for( my $i = 0; $i < @$css; $i++ ) {
+ next unless @{$css->[$i]}>$length;
+ $index = $i;
+ $length = @{$css->[$i]};
+ }
+ }
+ else {
+ for( my $i = 0; $i < @$css; $i++ ) {
+ next unless length($css->[$i])>$length;
+ $index = $i;
+ $length = length($css->[$i]);
+ }
+ }
+ return $css->[$index];
+ }
+
+};
+# }}}
+#{{{ Class::Classless module
+{
+ package Class::Classless;
+ use strict;
+ use vars qw(@ISA);
+ use Carp;
+
+ @ISA = ();
+
+ ###########################################################################
+
+ @Class::Classless::X::ISA = ();
+
+ ###########################################################################
+ ###########################################################################
+
+ sub Class::Classless::X::AUTOLOAD {
+ # This's the big dispatcher.
+
+ my $it = shift @_;
+ my $m = ($Class::Classless::X::AUTOLOAD =~ m/([^:]+)$/s )
+ ? $1 : $Class::Classless::X::AUTOLOAD;
+
+ croak "Can't call Class::Classless methods (like $m) without an object"
+ unless ref $it; # sanity, basically.
+
+ my $prevstate;
+ $prevstate = ${shift @_}
+ if scalar(@_) && defined($_[0]) &&
+ ref($_[0]) eq 'Class::Classless::CALLSTATE::SHIMMY'
+ ; # A shim! we were called via $callstate->NEXT
+
+ my $no_fail = $prevstate ? $prevstate->[3] : undef;
+ my $i = $prevstate ? ($prevstate->[1] + 1) : 0;
+ # where to start scanning
+ my $lineage;
+
+ # Get the linearization of the ISA tree
+ if($prevstate) {
+ $lineage = $prevstate->[2];
+ } elsif(defined $it->{'ISA_CACHE'} and ref $it->{'ISA_CACHE'} ){
+ $lineage = $it->{'ISA_CACHE'};
+ } else {
+ $lineage = [ &Class::Classless::X::ISA_TREE($it) ];
+ }
+
+ # Was:
+ #my @lineage =
+ # $prevstate ? @{$prevstate->[2]}
+ # : &Class::Classless::X::ISA_TREE($it);
+ # # Get the linearization of the ISA tree
+ # # ISA-memoization happens in the ISA_TREE function.
+
+ for(; $i < @$lineage; ++$i) {
+
+ if( !defined($no_fail) and exists($lineage->[$i]{'NO_FAIL'}) ) {
+ $no_fail = ($lineage->[$i]{'NO_FAIL'} || 0);
+ # so the first NO_FAIL sets it
+ }
+
+ if( ref($lineage->[$i]{'METHODS'} || 0) # sanity
+ && exists($lineage->[$i]{'METHODS'}{$m})
+ ){
+ # We found what we were after. Now see what to do with it.
+ my $v = $lineage->[$i]{'METHODS'}{$m};
+ return $v unless defined $v and ref $v;
+
+ if(ref($v) eq 'CODE') { # normal case, I expect!
+ # Used to have copying of the arglist here.
+ # But it was apparently useless, so I deleted it
+ unshift @_,
+ $it, # $_[0] -- target object
+ # a NEW callstate
+ bless([$m, $i, $lineage, $no_fail, $prevstate ? 1 : 0],
+ 'Class::Classless::CALLSTATE'
+ ), # $_[1] -- the callstate
+ ;
+ goto &{ $v }; # yes, magic goto! bimskalabim!
+ }
+ return @$v if ref($v) eq '_deref_array';
+ return $$v if ref($v) eq '_deref_scalar';
+ return $v; # fallthru
+ }
+ }
+
+ if($m eq 'DESTROY') { # mitigate DESTROY-lookup failure at global destruction
+ # should be impossible
+ } else {
+ if($no_fail || 0) {
+ return;
+ }
+ croak "Can't find ", $prevstate ? 'NEXT method' : 'method',
+ " $m in ", $it->{'NAME'} || $it,
+ " or any ancestors\n";
+ }
+ }
+
+ ###########################################################################
+ ###########################################################################
+
+ sub Class::Classless::X::DESTROY {
+ # noop
+ }
+
+ ###########################################################################
+ sub Class::Classless::X::ISA_TREE {
+ # The linearizer!
+ # Returns the search path for $_[0], starting with $_[0]
+ # Possibly memoized.
+
+ # I stopped being able to understand this algorithm about five
+ # minutes after I wrote it.
+ use strict;
+
+ my $set_cache = 0; # flag to set the cache on the way out
+
+ if(exists($_[0]{'ISA_CACHE'})) {
+ return @{$_[0]{'ISA_CACHE'}}
+ if defined $_[0]{'ISA_CACHE'}
+ and ref $_[0]{'ISA_CACHE'};
+
+ # Otherwise, if exists but is not a ref, it's a signal that it should
+ # be replaced at the earliest, with a listref
+ $set_cache = 1;
+ }
+
+ my $has_mi = 0; # set to 0 on the first node we see with 2 parents!
+ # First, just figure out what's in the tree.
+ my %last_child = ($_[0] => 1); # as if already seen
+
+ # if $last_child{$x} == $y, that means:
+ # 1) incidentally, we've passed the node $x before.
+ # 2) $x is the last child of $y,
+ # so that means that $y can be pushed to the stack only after
+ # we've pushed $x to the stack.
+
+ my @tree_nodes;
+ {
+ my $current;
+ my @in_stack = ($_[0]);
+ while(@in_stack) {
+ next unless
+ defined($current = shift @in_stack)
+ && ref($current) # sanity
+ && ref($current->{'PARENTS'} || 0) # sanity
+ ;
+
+ push @tree_nodes, $current;
+
+ $has_mi = 1 if @{$current->{'PARENTS'}} > 1;
+ unshift
+ @in_stack,
+ map {
+ if(exists $last_child{$_}) { # seen before!
+ $last_child{$_} = $current;
+ (); # seen -- don't re-explore
+ } else { # first time seen
+ $last_child{$_} = $current;
+ $_; # first time seen -- explore now
+ }
+ }
+ @{$current->{'PARENTS'}}
+ ;
+ }
+
+ # If there was no MI, then that first scan was sufficient.
+ unless($has_mi) {
+ $_[0]{'ISA_CACHE'} = \@tree_nodes if $set_cache;
+ return @tree_nodes;
+ }
+
+ # Otherwise, toss this list and rescan, consulting %last_child
+ }
+
+ # $last_child{$parent} holds the last (or only) child of $parent
+ # in this tree. When walking the tree this time, only that
+ # child is authorized to put its parent on the @in_stack.
+ # And that's the only way a node can get added to @in_stack,
+ # except for $_[0] (the start node) being there at the beginning.
+
+ # Now, walk again, but this time exploring parents the LAST
+ # time seen in the tree, not the first.
+
+ my @out;
+ {
+ my $current;
+ my @in_stack = ($_[0]);
+ while(@in_stack) {
+ next unless defined($current = shift @in_stack) && ref($current);
+ push @out, $current; # finally.
+ unshift
+ @in_stack,
+ grep(
+ (
+ defined($_) # sanity
+ && ref($_) # sanity
+ && $last_child{$_} eq $current,
+ ),
+ # I'm lastborn (or onlyborn) of this parent
+ # so it's OK to explore now
+ @{$current->{'PARENTS'}}
+ )
+ if ref($current->{'PARENTS'} || 0) # sanity
+ ;
+ }
+
+ unless(scalar(@out) == scalar(keys(%last_child))) {
+ # the counts should be equal
+ my %good_ones;
+ @good_ones{@out} = ();
+ croak
+ "ISA tree for " .
+ ($_[0]{'NAME'} || $_[0]) .
+ " is apparently cyclic, probably involving the nodes " .
+ nodelist( grep { ref($_) && !exists $good_ones{$_} }
+ values(%last_child) )
+ . "\n";
+ }
+ }
+ #print "Contents of out: ", nodelist(@out), "\n";
+
+ $_[0]{'ISA_CACHE'} = \@out if $set_cache;
+ return @out;
+ }
+
+ ###########################################################################
+
+ sub Class::Classless::X::can { # NOT like UNIVERSAL::can ...
+ # return 1 if $it is capable of the method given -- otherwise 0
+ my($it, $m) = @_[0,1];
+ return undef unless ref $it;
+
+ croak "undef is not a valid method name" unless defined($m);
+ croak "null-string is not a valid method name" unless length($m);
+
+ foreach my $o (&Class::Classless::X::ISA_TREE($it)) {
+ return 1
+ if ref($o->{'METHODS'} || 0) # sanity
+ && exists $o->{'METHODS'}{$m};
+ }
+
+ return 0;
+ }
+
+
+ ###########################################################################
+
+ sub Class::Classless::X::isa { # Like UNIVERSAL::isa
+ # Returns true for $X->isa($Y) iff $Y is $X or is an ancestor of $X.
+
+ return unless ref($_[0]) && ref($_[1]);
+ return scalar(grep {$_ eq $_[1]} &Class::Classless::X::ISA_TREE($_[0]));
+ }
+
+ ###########################################################################
+
+ sub nodelist { join ', ', map { "" . ($_->{'NAME'} || $_) . ""} @_ }
+
+ ###########################################################################
+ ###########################################################################
+ ###########################################################################
+ # Methods for the CALLSTATE class.
+ # Basically, CALLSTATE objects represent the state of the dispatcher,
+ # frozen at the moment when the method call was dispatched to the
+ # appropriate sub.
+ # In the grand scheme of things, this needn't be a class -- I could
+ # have just made the callstate data-object be a hash with documented
+ # keys, or a closure that responded to only certain parameters,
+ # etc. But I like it this way. And I like being able to say simply
+ # $cs->NEXT
+ # Yes, these are a bit cryptically written, but it's behoovy for
+ # them to be very very efficient.
+
+ @Class::Classless::ISA = ();
+ sub Class::Classless::CALLSTATE::found_name { $_[0][0] }
+ # the method name called and found
+ sub Class::Classless::CALLSTATE::found_depth { $_[0][1] }
+ # my depth in the lineage
+ sub Class::Classless::CALLSTATE::lineage { @{$_[0][2]} }
+ # my lineage
+ sub Class::Classless::CALLSTATE::target { $_[0][2][ 0 ] }
+ # the object that's the target -- same as $_[0] for the method called
+ sub Class::Classless::CALLSTATE::home { $_[0][2][ $_[0][1] ] }
+ # the object I was found in
+ sub Class::Classless::CALLSTATE::sub_found {
+ $_[0][2][ $_[0][1] ]{'METHODS'}{ $_[0][0] }
+ } # the routine called
+
+ sub Class::Classless::CALLSTATE::no_fail { $_[0][3] }
+ sub Class::Classless::CALLSTATE::set_no_fail_true { $_[0][3] = 1 }
+ sub Class::Classless::CALLSTATE::set_fail_false { $_[0][3] = 0 }
+ sub Class::Classless::CALLSTATE::set_fail_undef { $_[0][3] = undef }
+
+ sub Class::Classless::CALLSTATE::via_next { $_[0][4] }
+
+ sub Class::Classless::CALLSTATE::NEXT {
+ #croak "NEXT needs at least one argument: \$cs->NEXT('method'...)"
+ # unless @_ > 1;
+ # no longer true.
+ my $cs = shift @_;
+ my $m = shift @_; # which may be (or come out) undef...
+ $m = $cs->[0] unless defined $m; # the method name called and found
+
+ ($cs->[2][0])->$m(
+ bless( \$cs, 'Class::Classless::CALLSTATE::SHIMMY' ),
+ @_
+ );
+ }
+
+ ###########################################################################
+};
+#}}}
+
+###############
+###
+#
+# {{{ *** C h a n g e l o g ***
+#
+# 0.6ca
+# - add screen support (from nicklist.pl)
+# - rename to adv_windowlist.pl (advanced window list) since it isn't just a
+# window list status bar (wlstat) anymore
+# - names can now have a max length and window names can be used
+# - fixed a bug with block display in screen mode and statusbar mode
+# - added space handling to ir_fe and removed it again
+# - now handling formats on my own
+# - 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
+#
+# 0.5d
+# - add setting to also hide the last statusbar if empty (awl_all_disable)
+# - reverted to old utf8 code to also calculate broken utf8 length correctly
+# - simplified dealing with statusbars in wlreset
+# - added a little tweak for the renamed term_type somewhere after Irssi 0.8.9
+# - fixed bug in handling channel #$$
+# - typo on line 200 spotted by f0rked
+# - reset background colour at the beginning of an entry
+#
+# 0.4d
+# - fixed order of disabling statusbars
+# - 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 for Geert Hauwaerts ( geert@irssi.org ) :)
+# - 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 statusbars
+# - reset on /reload
+# - position/placement settings
+#
+# 0.2
+# - automated retrieval of key bindings (thanks grep.pl authors)
+# - improved removing of statusbars
+# - got rid of status chop
+#
+# 0.1
+# - rewritten to suit my needs
+# - based on chanact 0.5.5
+# }}}
+# vim: se fdm=marker tw=80 :
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-11-23 09:38:44 +0000