DouKaku?

    begingroupundo;
    if ( getconfig( "AutoAdjustOrikaeshi" ) == 2 ) {
        #width = windowwidth;
    } else {
        #width = getconfig( "Orikaeshi" );
    }
    if ( !selecting ) {
        #top = 1;
        #end = linecount2;
    } else {
        #top = seltoplineno;
        #end = selendlineno;
        escape;
    }
    #i = #top;
    while( #i <= #end ) {
        movetolineno 1, #i;
        #margin = #width - linelen2;
        if ( #margin >= 0 ) {
            #j = #margin / 2;
            $margin = "";
            while( #j > 0 ) {
                $margin = $margin + " ";
                #j = #j - 1;
            }
            insert $margin;
        } else {
            beginsel;
            movetolineno linelen2 + 1, #i;
            $text = gettext( seltopx, seltopy, selendx, selendy, 1 );
            delete;
            call cutstr, $text, #width;
            insert $$return;
        }
        #i = #i + 1;
    }
    endgroupundo;
    endmacro;

cutstr:
    $$src = $$1;
    ##width = ##2;
    if ( ##width < 0 ) {
        ##width = 0;
    }
    if ( ##width > strlen( $$src ) ) {
        ##width = strlen( $$src );
    }
    ##start = strlen( $$src ) - ##width;
    ##end = strlen( $$src ) + ##width;
    ##i = 0;
    $$dest = "";
    $$left = "";
    $$right = "";
    while( ##i * 2 < ##end ) {
        ##char = ascii( $$src );
        ##bytes = strlen( char( ##char ) );
        if ( ##i * 2 < ##start ) {
            $$left = char( ##char );
        }
        if ( ( ( ##i + ##bytes ) * 2 > ##end ) && ( $$right == "" ) ) {
            $$right = char( ##char );
        }
        if ( ( ##i * 2 >= ##start ) && ( ( ##i + ##bytes ) * 2 <= ##end ) ) {
            $$dest = $$dest + char( ##char );
        }
        $$src = rightstr( $$src, strlen( $$src ) - ##bytes );
        ##i = ##i + ##bytes;
    }
    if ( $$right == "" ) {
        $$right = char( ascii( $$src ) );
    }
    if ( strlen( $$dest ) >= ##width ) {
        return $$dest;
    }
    if ( ( strlen( $$left + $$dest ) <= ##width ) && ( $$left != "" ) ) {
        return $$left + $$dest;
    }
    if ( ( strlen( $$dest + $$right ) <= ##width ) && ( $$right != "" ) ) {
        return $$dest + $$right;
    }
    return $$dest;