#! perl

sub msg {
   my ($self, $msg) = @_;

   my $overlay = $self->overlay (0, 0, $self->strwidth ($msg), 1);
   $overlay->set (0, 0, $msg);
   my $iow; $iow = urxvt::timer->new->start (urxvt::NOW + 1)->cb (sub {
      undef $overlay;
      undef $iow;
   });
}

sub on_start {
   my ($self) = @_;

   $self->{browser} = $self->x_resource ("urlLauncher") || "x-www-browser";

   $self->grab_button (3, urxvt::ControlMask);

   ()
}

our @hook;

sub on_button_press {
   my ($self, $event) = @_;

   if ($event->{button} == 3 && $event->{state} & urxvt::ControlMask) {
      my $popup = $self->popup ($event)
         or return 1;

      $popup->add_title ("Convert Selection");

      my $text = $self->selection;

      my $title = $text;
      $title =~ s/[\x00-\x1f\x80-\x9f]/·/g;
      substr $title, 40, -1, "..." if 40 < length $title;
      $popup->add_title ($title);
      $popup->add_separator;

      my $add_button = sub {
         my ($title, $cb) = @_;

         $popup->add_button ($title => sub {
            for ($text) {
               my $orig = $_;
               $cb->();

               if ($orig ne $_) {
                  $self->selection ($_);
                  s/[\x00-\x1f\x80-\x9f]/·/g;
                  $self->msg ($self->special_encode ($_));
               }
            }
         });
      };

      for ($text) {
         $add_button->("rot13" => sub { y/A-Za-z/N-ZA-Mn-za-m/ });
         $add_button->("eval perl expression" => sub { no warnings; $_ = eval $_ });

         /^(\S+):(\d+):?$/
            and $add_button->("vi-commands to load '$1'" => sub { s/^(\S+):(\d+):?$/\x1b:e $1\x0d:$2\x0d/ });

         /%[0-9a-fA-F]{2}/ && !/%[^0-9a-fA-F]/ && !/%.[^0-9a-fA-F]/
            and $add_button->("uri unescape" => sub { s/%([0-9a-fA-F]{2})/chr hex $1/ge });

         /[\\"'\ \t|&;<>()]/
            and $add_button->("shell quote" => sub { $_ = "\Q$_" });

         /^(http|ftp|telnet|irc|news):\//
            and $add_button->("run $self->{browser}" => sub { urxvt::exec_async $self->{browser}, $_ });

         for my $hook (@hook) {
            if (my ($title, $cb) = $hook->($popup)) {
               $add_button->($title, $cb);
            }
         }

         if (/^\s*((?:0x)?\d+)\s*$/) {
            $popup->add_title (sprintf "%20s", eval $1);
            $popup->add_title (sprintf "%20s", sprintf "0x%x", eval $1);
            $popup->add_title (sprintf "%20s", sprintf "0%o", eval $1);
         }
      }

      $popup->show;

      return 1;
   }

   ()
}