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#! perl

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

    my $hotkey = $self->{argv}[0]
      || $self->x_resource ("pass")
      || "M-w";

    $self->parse_keysym ($hotkey, "perl:pass:start")
      or warn "unable to register '$hotkey' as pass start hotkey\n";

    return;
}

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

    $self->enter if $cmd eq 'pass:start';

    return;
}

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

    return if $self->displaying_msg || $self->displaying_prompt;

    $self->enable(
        key_press => \&key_press,
    );

    #eval {
        $self->which_password;
    #};
    #if ($@) {
        #$self->timed_message($@);
        #$self->leave;
    #}
}

sub leave {
   my ($self) = @_;
   delete $self->{overlay};
   delete $self->{prompt};
   delete $self->{state};
   $self->disable("key_press");
}

sub msg {
    my ($self, $msg) = @_;
    delete $self->{timed_overlay};
    $self->{overlay} = $self->overlay (0, -2, $self->ncol, 1, urxvt::OVERLAY_RSTYLE, 0);
    $self->{overlay}->set (0, 0, $self->special_encode ($msg));
}

sub timed_msg {
    my ($self, $msg) = @_;
    delete $self->{overlay};
    $self->{timed_overlay} = $self->overlay (0, -2, $self->ncol, 1, urxvt::OVERLAY_RSTYLE, 0);
    $self->{timed_overlay}->set (0, 0, $self->special_encode ($msg));
    $self->{timed_overlay_timer} = urxvt::timer->new->after(1)->cb(sub {
        delete $self->{timed_overlay};
    });
}

sub displaying_msg {
    my ($self) = @_;
    return defined $self->{overlay};
}

sub prompt {
    my ($self, $msg, $hide, $next) = @_;
    $self->{state} = 'prompt';
    $self->{prompt_hide} = $hide;
    $self->{prompt_msg} = $msg;
    $self->{prompt_next} = $next;
    $self->{prompt_buffer} = '';
    $self->prompt_redisplay;
}

sub prompt_redisplay {
    my ($self) = @_;
    my $buf = $self->{prompt_buffer};
    $buf = '' if $self->{prompt_hide};
    my $msg = $self->{prompt_msg} . $buf. "█";
    $self->{prompt} = $self->overlay(0, -1, $self->ncol, 1, urxvt::OVERLAY_RSTYLE, 0);
    $self->{prompt}->set(0, 0, $self->special_encode ($msg));
}

sub displaying_prompt {
    my ($self) = @_;
    return $self->{state} eq 'prompt';
}

sub prompt_handle {
    my ($self, $string) = @_;
    $self->{prompt_buffer} .= $string;
    $self->prompt_redisplay;
}

sub prompt_delete {
    my ($self) = @_;
    substr $self->{prompt_buffer}, -1, 1, "";
    $self->prompt_redisplay;
}

sub prompt_finish {
    my ($self) = @_;
    delete $self->{prompt};
    delete $self->{state};
    my $next = delete $self->{prompt_next};
    my $buf  = delete $self->{prompt_buffer};
    $next->($buf);
    return;
}

sub which_password {
    my $self = shift;

    $self->prompt('Password to insert: ', 0, sub {
        my $passname = shift;
        my $password = `pass search $passname`;

        if ($password) {
            $self->tt_write($password);
        }
        else {
            $self->timed_msg("Unknown password $passname");
        }
        $self->leave;
    });
}

sub key_press {
   my ($self, $event, $keysym, $string) =  @_;

   delete $self->{manpage_overlay};

   if ($keysym == 0xff1b || $string =~ /\cc/) { # escape or ^C
       $self->timed_msg('Aborted.');
       $self->leave;
   }

   if ($self->{state} eq 'prompt'){
       if ($keysym == 0xff0d || $keysym == 0xff8d) { # enter
           $self->prompt_finish;
       }
       elsif ($keysym == 0xff08) { # backspace
           $self->prompt_delete;
       }
       else {
           $self->prompt_handle($string);
       }
   }

   return 1;
}