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use strict;
use vars qw($VERSION %IRSSI);
use Irssi qw(command signal_add signal_add_first active_win
settings_get_str settings_get_bool channels windows
settings_add_str settings_add_bool get_irssi_dir
window_find_refnum signal_stop);
$VERSION = '2.20';
%IRSSI = (
authors => 'Juerd',
contact => 'juerd@juerd.nl',
name => 'Scroll buffer restorer',
description => 'Saves the buffer for /upgrade, so that no information is lost',
license => 'Public Domain',
url => 'http://juerd.nl/irssi/',
changed => 'Thu Sep 22 01:37 CEST 2016',
changes => 'Fixed file permissions (leaked everything via filesystem)',
note1 => 'This script HAS TO BE in your scripts/autorun!',
note2 => 'Perl support must be static or in startup',
);
# Q: How can I get a very smooth and clean upgrade?
#
# A: /set -clear upgrade_separator
# /set upgrade_suppress_join ON (default)
# /set channel_sync OFF
# Q: Can I use color in the upgrade_separator?
# Q: Is it possible to save my command history?
# Q: Can I prevent the screen from blinking?
# Q: Can you make it faster?
#
# A: Probably not, but if you can do it, tell me how.
use Irssi::TextUI;
use Data::Dumper;
my %suppress;
sub _filename { sprintf '%s/scrollbuffer', get_irssi_dir }
sub upgrade {
my $fn = _filename;
my $old_umask = umask 0077;
open my $fh, q{>}, $fn or die "open $fn: $!";
umask $old_umask;
print $fh join("\0", map $_->{server}->{address} . $_->{name}, channels), "\n";
for my $window (windows) {
next unless defined $window;
next if $window->{name} eq 'status';
my $view = $window->view;
my $line = $view->get_lines;
my $lines = 0;
my $buf = '';
if (defined $line){
{
$buf .= $line->get_text(1) . "\n";
$line = $line->next;
$lines++;
redo if defined $line;
}
}
printf $fh "%s:%s\n%s", $window->{refnum}, $lines, $buf;
}
close $fh;
unlink sprintf("%s/sessionconfig", get_irssi_dir);
command 'layout save';
command 'save';
}
sub restore {
my $fn = _filename;
open my $fh, q{<}, $fn or die "open $fn: $!";
unlink $fn or warn "unlink $fn: $!";
my @suppress = split /\0/, readline $fh;
if (settings_get_bool 'upgrade_suppress_join') {
chomp $suppress[-1];
@suppress{@suppress} = (2) x @suppress;
}
active_win->command('^window scroll off');
while (my $bla = readline $fh){
chomp $bla;
my ($refnum, $lines) = split /:/, $bla;
next unless $lines;
my $window = window_find_refnum $refnum;
unless (defined $window){
readline $fh for 1..$lines;
next;
}
my $view = $window->view;
$view->remove_all_lines();
$view->redraw();
my $buf = '';
$buf .= readline $fh for 1..$lines;
my $sep = settings_get_str 'upgrade_separator';
$sep .= "\n" if $sep ne '';
$window->gui_printtext_after(undef, MSGLEVEL_CLIENTNOTICE, "$buf\cO$sep");
$view->redraw();
}
active_win->command('^window scroll on');
active_win->command('^scrollback end');
}
sub suppress {
my ($first, $second) = @_;
return unless scalar keys %suppress and settings_get_bool 'upgrade_suppress_join';
my $key_part = (grep { /^:?[#!+&]/ } split ' ', $second)[0];
$key_part =~ s/^://;
my $key = $first->{address} . $key_part;
if (exists $suppress{$key} and $suppress{$key}--) {
signal_stop();
delete $suppress{$key} unless $suppress{$key};
}
}
settings_add_str 'buffer', 'upgrade_separator' => '=Upgrade=';
settings_add_bool 'buffer', 'upgrade_suppress_join' => 1;
signal_add_first 'session save' => 'upgrade';
signal_add_first 'session restore' => 'restore';
signal_add 'event 366' => 'suppress';
signal_add 'event join' => 'suppress';
unless (-f sprintf('%s/scripts/autorun/buf.pl', get_irssi_dir)) {
Irssi::print('PUT THIS SCRIPT IN ~/.irssi/scripts/autorun/ BEFORE /UPGRADING!!');
}
# Remove any left-over file. If 'session' doesn't exist (created by irssi
# during /UPGRADE), neither should our file.
unless (-e sprintf('%s/session', get_irssi_dir)) {
my $fn = _filename;
unlink $fn or warn "unlink $fn: $!" if -e $fn;
}
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