improved scientific number formatting using unicode superscript symbols (df1615f4) · Commits · github_fork / Clip

core/format.cc

+65 −4

Original line number	Diff line number	Diff line
		@@ -21,11 +21,72 @@

		namespace fviz {

		std::string format_superscript(int n) {
		std::stringstream sstream;

		for (const auto& c : std::to_string(n)) {
		switch (c) {
		case '0':
		sstream << "⁰";
		break;
		case '1':
		sstream << "¹";
		break;
		case '2':
		sstream << "²";
		break;
		case '3':
		sstream << "³";
		break;
		case '4':
		sstream << "⁴";
		break;
		case '5':
		sstream << "⁵";
		break;
		case '6':
		sstream << "⁶";
		break;
		case '7':
		sstream << "⁷";
		break;
		case '8':
		sstream << "⁸";
		break;
		case '9':
		sstream << "⁹";
		break;
		case '-':
		sstream << "⁻";
		break;
		default:
		sstream << "�";
		break;
		}
		}

		return sstream.str();
		}

		Formatter format_decimal_scientific(size_t precision) {
		return [precision] (size_t idx, const std::string& v) -> std::string {
		std::stringstream s;
		s << std::scientific << std::setprecision(precision) << value_to_float(v);
		return s.str();
		return [precision] (size_t idx, const std::string& vs) -> std::string {
		auto v = value_to_float(vs);
		if (v == 0) {
		return "0";
		}

		auto e = int(log10(v));
		auto x = v / pow(10, e);

		std::stringstream sstream;
		sstream
		<< std::fixed
		<< std::setprecision(precision)
		<< x
		<< " × 10"
		<< format_superscript(e);

		return sstream.str();
		};
		}