Class IndeterminateProgressScaleWriter

src/indicators.hpp:1872–1913

};

class IndeterminateProgressScaleWriter {
public:
  IndeterminateProgressScaleWriter(std::ostream &os, size_t bar_width, const std::string &fill,
                                   const std::string &lead)
      : os(os), bar_width(bar_width), fill(fill), lead(lead) {}

  std::ostream &write(size_t progress) {
    for (size_t i = 0; i < bar_width;) {
      std::string next;
      size_t current_display_width = 0;

      if (i < progress) {
        next = fill;
        current_display_width = unicode::display_width(fill);
      } else if (i == progress) {
        next = lead;
        current_display_width = unicode::display_width(lead);
      } else {
        next = fill;
        current_display_width = unicode::display_width(fill);
      }

      i += current_display_width;

      if (i > bar_width) {
        // `next` is larger than the allowed bar width
        // fill with empty space instead
        os << std::string((bar_width - (i - current_display_width)), ' ');
        break;
      }

      os << next;
    }
    return os;
  }

private:
  std::ostream &os;
  size_t bar_width = 0;
  std::string fill;
  std::string lead;
};

} // namespace details
} // namespace indicators