Method format

plugins/manipulator.cpp:512–560

        return NULL;
    }
    string format (T obj, string fmt)
    {
        string dest = "";
        bool in_opt = false;
        size_t i = 0;
        while (i < fmt.size())
        {
            if (in_opt)
            {
                if (fmt[i] == '%')
                {
                    // escape: %% -> %
                    in_opt = false;
                    dest.push_back('%');
                    i++;
                }
                else
                {
                    string opt = grab_opt(fmt, i);
                    if (opt.size())
                    {
                        T_callback func = get_callback(opt);
                        if (func != NULL)
                            dest += func(obj);
                        i += opt.size();
                        in_opt = false;
                        if (i < fmt.size() && fmt[i] == '$')
                            // Allow $ to terminate format options
                            i++;
                    }
                    else
                    {
                        // Unrecognized format option; replace with original text
                        dest.push_back('%');
                        in_opt = false;
                    }
                }
            }
            else
            {
                if (fmt[i] == '%')
                    in_opt = true;
                else
                    dest.push_back(fmt[i]);
                i++;
            }
        }
        return dest;
    }
protected:
    T_optlist opt_list;
};