[tab_stop.pl] Implement tab stops with configurable length

This changes the default behaviour to make TAB replacements line up.
To get the original behaviour, the user will need to do `/set
tabstop_interval 0` explicitly.

diff --git a/scripts/tab_stop.pl b/scripts/tab_stop.pl
index 015635ae152cbc9700fa188b110ca3d9484d537a..2a3ba12b84cf694e16e0cd7369a6e53f07f9235b 100644 (file)
--- a/scripts/tab_stop.pl
+++ b/scripts/tab_stop.pl
@@ -9,28 +9,38 @@
 #
 # 24.05.2011
 # * Buggered about with by shabble.
+#
+# 19.01.2022
+# * Added tabstop_interval support
 
 use strict;
 use warnings;
 
 use Irssi;
 
-our $VERSION = "2011052400";
+our $VERSION = "2022011900";
 our %IRSSI = (
-              authors     => "Stefan 'tommie' Tomanek, shabble",
-              contact     => "stefan\@pico.ruhr.de, shabble@#irssi/Freenode",
-              name        => "tab_stop",
-              description => 'Replaces \t TAB characters with '
-                           . 'contents of /set tabstop_replacement',
-              license     => "GPLv2",
-              changed     => "$VERSION",
-             );
+    authors     => "Stefan 'tommie' Tomanek, shabble",
+    contact     => "stefan\@pico.ruhr.de, shabble@#irssi/Freenode",
+    name        => "tab_stop",
+    description => 'Replaces \t TAB characters to line up with tab stops '
+                 . '(default 8) or to contents of /set tabstop_replacement '
+                 . 'if tabstop_interval is set to 0',
+    license     => "GPLv2",
+    changed     => "$VERSION",
+    );
 
 my $not_tab;
+my $interval;
 
 sub sig_gui_print_text {
     return unless $_[4] =~ /\t/;
-    $_[4] =~ s/\t/$not_tab/g;
+    if ($interval) {
+        while ($_[4] =~ s{^(.*?)\t}{ sprintf("%s%s", $1, " " x ($interval - length($1) % $interval)) }e) {
+        }
+    } else {
+        $_[4] =~ s/\t/$not_tab/g;
+    }
     Irssi::signal_continue(@_);
 }
 
@@ -41,9 +51,11 @@ Irssi::expando_create('TAB', sub { "\t" }, { 'gui exit' => 'never' });
 Irssi::signal_add_first('gui print text', \&sig_gui_print_text);
 Irssi::signal_add('setup changed', \&sig_setup_changed);
 Irssi::settings_add_str('misc', 'tabstop_replacement', "    ");
+Irssi::settings_add_int('misc', 'tabstop_interval', 8);
 
 sub sig_setup_changed {
     $not_tab = Irssi::settings_get_str('tabstop_replacement');
+    $interval = Irssi::settings_get_int('tabstop_interval');
 }
 
 sig_setup_changed();