static bool skin_render_line(struct skin_element* line, struct skin_draw_info *info)
{
    bool needs_update = false;
    int last_value, value;
    bool in_changed_alternator = false;
    struct skin_element *child;
    struct conditional *conditional;
    int old_refresh_mode = info->refresh_type;
    
    if (line->type == LINE_ALTERNATOR)
    {
        line = line->children[alternator_change_line(line, info,
                                                     &in_changed_alternator)];
        if (line->children_count == 0)
            return in_changed_alternator;
        if (in_changed_alternator)
        {
            info->refresh_type = SKIN_REFRESH_ALL;
            info->force_redraw = true;
        }
        
    }
    
    if (line->children_count == 0)
        return false; /* empty line, do nothing */
    child = line->children[0];
        
    while (child)
    {
        switch (child->type)
        {
            case CONDITIONAL:
                conditional = (struct conditional*)child->data;
                last_value = conditional->last_value;
                value = evaluate_conditional(info->gwps, info->offset, 
                                             conditional, child->children_count);
                conditional->last_value = value;
                if (child->children_count == 1)
                {
                    /* special handling so 
                     * %?aa<true> and %?<true|false> need special handlng here */
                    
                    if (value == -1) /* tag is false */
                    {
                        /* we are in a false branch of a %?aa<true> conditional */
                        if (last_value == 0)
                            do_tags_in_hidden_conditional(child->children[0], info);
                        break;
                    }
                }
                else
                {
                    if (last_value >= 0 && value != last_value && last_value < child->children_count)
                        do_tags_in_hidden_conditional(child->children[last_value], info);
                }
                if (value != last_value)
                {
                    info->refresh_type = SKIN_REFRESH_ALL;
                    info->force_redraw = true;
                }
                if (skin_render_line(child->children[value], info))
                    needs_update = true;
                else
                    needs_update = needs_update || (last_value != value);
                    
                info->refresh_type = old_refresh_mode;
                break;
            case TAG:
                if (child->tag->flags & NOBREAK)
                    info->no_line_break = true;
                if (child->tag->type == SKIN_TOKEN_SUBLINE_SCROLL)
                    info->line_scrolls = true;
                
                fix_line_alignment(info, child);
                
                if (!child->data)
                {
                    break;
                }
                if (!do_non_text_tags(info->gwps, info, child, &info->skin_vp->vp))
                {
                    static char tempbuf[128];
                    const char *value = get_token_value(info->gwps, child->data,
                                                        info->offset, tempbuf,
                                                        sizeof(tempbuf), NULL);
                    if (value)
                    {
#if CONFIG_RTC
                        if (child->tag->flags&SKIN_RTC_REFRESH)
                            needs_update = needs_update || info->refresh_type&SKIN_REFRESH_DYNAMIC;
#endif
                        needs_update = needs_update || 
                                ((child->tag->flags&info->refresh_type)!=0);
                        strlcat(info->cur_align_start, value, 
                                info->buf_size - (info->cur_align_start-info->buf));
                    }
                }
                break;
            case TEXT:
                strlcat(info->cur_align_start, child->data, 
                        info->buf_size - (info->cur_align_start-info->buf));
                needs_update = needs_update || 
                                (info->refresh_type&SKIN_REFRESH_STATIC) != 0;
                break;
            case COMMENT:
            default:
                break;
        }

        child = child->next;
    }
    if (in_changed_alternator)
    {
        info->refresh_type = old_refresh_mode;
        info->force_redraw = false;
        needs_update = true;
    }
    return needs_update;
}