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[inputlength] Add feature to count backwards from the maximum possible length #914

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Merged
bw1 merged 5 commits into from
Aug 19, 2026
Merged

[inputlength] Add feature to count backwards from the maximum possible length #914

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db90b7d
[inputlength] Fix indentation inconsistencies
kontaxis Aug 15, 2026
6c16eb0
[inputlength] Add feature to count backwards from the maximum possibl…
kontaxis Aug 15, 2026
a6a9550
[inputlength] Match irc/core/irc-servers.c:split_message logic
kontaxis Aug 15, 2026
598736b
[inputlength] Add optional length offset
kontaxis Aug 15, 2026
7aefaca
[inputlength] use warnings
kontaxis Aug 16, 2026
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90 changes: 69 additions & 21 deletions scripts/il.pl
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Original file line number Diff line number Diff line change
Expand Up @@ -3,31 +3,33 @@
# inputlength = "{sb length: $@L}";
#
# with leading spaces: (3 spaces in example)
# inputlength = "{sb $[-!3]@L}";
# inputlength = "{sb $[-!3]@L}";
#
# with leading char "-"
#
# inputlength = "{sb $[-!3-]@L}";
# inputlength = "{sb $[-!3-]@L}";
#
# you cant use numbers here. if you want to use the numbers use the
# you cant use numbers here. if you want to use the numbers use the
# perl script
#
#
# thanks to: Wouter Coekaerts <wouter@coekaerts.be> aka coekie
#
# add one of these 2 lines to your config in statusbar items section
#
# the perl scripts reacts on every keypress and updates the counter.
#
# the perl scripts reacts on every keypress and updates the counter.
# if you dont need/want this the settings are maybe enough for you.
# with the settings the item is update with a small delay.
#

use strict;
use Irssi 20021105;
use warnings;

use Irssi 20021105;
use Irssi::TextUI;

use vars qw($VERSION %IRSSI);
$VERSION = '0.0.6';
$VERSION = '0.1.0';
%IRSSI = (
authors => 'Marcus Rueckert',
contact => 'darix@irssi.org',
Expand All @@ -36,7 +38,7 @@
sbitems => 'inputlength',
license => 'BSD License or something more liberal',
url => 'http://www.irssi.de./',
changed => '2021-01-11'
changed => '2026-08-15'
);

my $help = << "END";
Expand All @@ -54,65 +56,111 @@
%9Settings%9
/set inputlength_width 0
/set inputlength_padding_char
/set inputlength_countdown 0
/set inputlength_offset 0
END

sub get_inputlength_max {
my $window = Irssi::active_win();
my $server = $window->{active_server};

return 0 unless $server;

# account for the max overhead in each 512-byte message (See RFC 1459)
my $max_msg_bytes = 512;

my $nick = $server->{nick};

# see irssi/src/irc/core/irc-servers.h
my $max_userhost_bytes = 63 + 10 + 1;
$max_msg_bytes = $max_msg_bytes - $max_userhost_bytes;

my $prefix = $nick . '!';

# message target, e.g., "#channel" or "nickname", if available
my $item = $window->{active};
my $target = $item ? $item->{name} : '';

# :prefix PRIVMSG target :message\r\n
my $prefix_len = 1 + length($prefix) + 1;
my $cmd_len = 8 + length($target) + 2;
my $crlf_len = 2;

my $max_txt_bytes = $max_msg_bytes - ($prefix_len + $cmd_len + $crlf_len);

return $max_txt_bytes;
}

sub beancounter {
my ( $sbItem, $get_size_only ) = @_;
my ( $sbItem, $get_size_only ) = @_;

my ( $width, $padChar, $padNum, $length );
my ( $width, $padChar, $padNum, $countdown, $lengthOffset );
my ( $txtLength, $length );

#
# getting settings
#
$width = Irssi::settings_get_int ( 'inputlength_width' );
$width = Irssi::settings_get_int ( 'inputlength_width' );
$padChar = Irssi::settings_get_str ( 'inputlength_padding_char' );
$countdown = Irssi::settings_get_bool ( 'inputlength_countdown' );
$lengthOffset = Irssi::settings_get_int ( 'inputlength_offset' );

$txtLength = Irssi::parse_special("\$\@L");
$txtLength = $txtLength + $lengthOffset;

# count remaining instead of encountered characters
if ($countdown) {
$txtLength = get_inputlength_max() - $txtLength;
}

#
# only one char allowed
#
$padChar =~ s/^(.).*?$/$1/;
$padChar =~ s/^(.).*?$/$1/;

#
# do we have to deal wit numbers for padding?
#
if ( $padChar =~ m/\d/ ) {
#
if ( $padChar =~ m/\d/ ) {
$padNum = $padChar;
$padChar = '-';
};

#
# getting formatted lengh
#
$length = Irssi::parse_special ( "\$[-!$width$padChar]\@L" );
$length = Irssi::parse_special ( "\$[-!$width$padChar]0", "$txtLength" );

#
# did we have a number?
#
$length =~ s/$padChar/$padNum/g if ( $padNum ne '' );
$length =~ s/$padChar/$padNum/g if ( defined $padNum && $padNum ne '' );

$sbItem->default_handler ( $get_size_only, "{sb $length}", undef, 1 );
$sbItem->default_handler ( $get_size_only, "{sb $length}", "", 1 );
}

Irssi::statusbar_item_register ( 'inputlength', 0, 'beancounter' );
#
# ToDo:
# - statusbar item register doesnt support function references.
# - statusbar item register doesnt support function references.
# so we have to stuck to the string and wait for cras.
#

Irssi::signal_add_last 'gui key pressed' => sub {
Irssi::statusbar_items_redraw ( 'inputlength' );
Irssi::statusbar_items_redraw ( 'inputlength' );
};

Irssi::settings_add_int ( 'inputlength', 'inputlength_width', 0 );
Irssi::settings_add_bool ( 'inputlength', 'inputlength_countdown', 0 );
Irssi::settings_add_int ( 'inputlength', 'inputlength_offset', 0 );
#
# setting:
#
#
# 0 means it resizes automatically
# greater means it has at least a size of n chars.
# it will grow if the space is to space is too small
#

Irssi::settings_add_str ( 'inputlength', 'inputlength_padding_char', " " );
#
# char to pad with
Expand Down
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