1 files changed, 112 insertions, 0 deletions
diff --git a/sb-position/sb_position.pl b/sb-position/sb_position.pl
new file mode 100644
index 0000000..3c60205
--- /dev/null
+++ b/sb-position/sb_position.pl
@@ -0,0 +1,112 @@
+
+# Display current position in scrollback in a statusbar item named 'position'.
+
+# Copyright (C) 2010  Simon Ruderich & Tom Feist
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+
+use strict;
+use warnings;
+
+use Irssi;
+use Irssi::TextUI;
+use POSIX qw(ceil);
+
+{ package Irssi::Nick }
+
+our $VERSION = '0.1';
+our %IRSSI = (
+    authors     => 'Simon Ruderich, Tom Feist',
+    contact     => 'simon@ruderich.org, shabble+irssi@metavore.org',
+    name        => 'sb_position',
+    description => 'Displays current position in scrollback.',
+    license     => 'GPLv3 or later',
+    changed     => '2010-12-02'
+);
+
+my ($buf, $size, $pos, $height, $empty);
+my ($pages, $cur_page, $percent);
+
+
+init();
+
+sub init {
+
+    # (re-)register it so we can access the WIN_REC object directly.
+    Irssi::signal_register({'gui page scrolled' => [qw/Irssi::UI::Window/]});
+    # primary update signal.
+    Irssi::signal_add('gui page scrolled', \&update_position);
+    Irssi::statusbar_item_register('position', 0, 'position_statusbar');
+
+    Irssi::signal_add("window changed",          \&update_position);
+    Irssi::signal_add_last("command clear",      \&update_cmd_shim);
+    Irssi::signal_add_last("command scrollback", \&update_cmd_shim);
+    # Irssi::signal_add_last("gui print text finished", sig_statusbar_more_updated);
+
+    update_position(Irssi::active_win());
+}
+
+sub update_cmd_shim {
+    my ($cmd, $server, $witem) = @_;
+
+    my $win = $witem ? $witem->window : Irssi::active_win;
+
+    update_position($win);
+}
+
+sub update_position {
+
+    my $win = shift;
+    return unless $win;
+
+    my $view = $win->view;
+
+    $pos    = $view->{ypos};
+    $buf    = $view->{buffer};
+    $height = $view->{height};
+    $size   = $buf->{lines_count};
+
+    $empty  = $view->{empty_linecount};
+    $empty  = 0 unless $empty;
+
+
+    $pages = ceil($size / $height);
+    $pages = 1 unless $pages;
+
+    my $buf_pos_cache = $size - $pos + ($height - $empty) - 1;
+
+    if ($pos == -1 or $size < $height) {
+        $cur_page = $pages;
+        $percent  = 100;
+    } elsif ($pos > ($size - $height)) {
+        $cur_page = 1;
+        $percent  = 0;
+    } else {
+        $cur_page = ceil($buf_pos_cache / $height);
+        $percent  = ceil($buf_pos_cache / $size * 100);
+    }
+
+    Irssi::statusbar_items_redraw('position');
+}
+
+sub position_statusbar {
+    my ($statusbar_item, $get_size_only) = @_;
+
+    # Alternate view.
+    #my $sb = "p=$pos, s=$size, h=$height, pp:$cur_page/$pages $percent%%";
+    my $sb = "Page: $cur_page/$pages $percent%%";
+
+    $statusbar_item->default_handler($get_size_only, "{sb $sb}", 0, 1);
+}