Class BlockProgressScaleWriter

src/indicators.hpp:1801–1826

}

class BlockProgressScaleWriter {
public:
  BlockProgressScaleWriter(std::ostream &os, size_t bar_width) : os(os), bar_width(bar_width) {}

  std::ostream &write(float progress) {
    std::string fill_text{"█"};
    std::vector<std::string> lead_characters{" ", "▏", "▎", "▍", "▌", "▋", "▊", "▉"};
    auto value = (std::min)(1.0f, (std::max)(0.0f, progress / 100.0f));
    auto whole_width = std::floor(value * bar_width);
    auto remainder_width = fmod((value * bar_width), 1.0f);
    auto part_width = std::floor(remainder_width * lead_characters.size());
    std::string lead_text = lead_characters[size_t(part_width)];
    if ((bar_width - whole_width - 1) < 0)
      lead_text = "";
    for (size_t i = 0; i < whole_width; ++i)
      os << fill_text;
    os << lead_text;
    for (size_t i = 0; i < (bar_width - whole_width - 1); ++i)
      os << " ";
    return os;
  }

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

class ProgressScaleWriter {
public: