改造一些

render_2D/axis/Axis_Format.cpp

@@ -0,0 +1,66 @@
+#include "Axis_Format.h"
+
+#include <algorithm>
+#include <iomanip>
+#include <sstream>
+
+namespace renderive::detail {
+namespace {
+
+std::string fixed_number(double value, int precision) {
+    std::ostringstream stream;
+    stream << std::fixed << std::setprecision(std::clamp(precision, 0, 12)) << value;
+    std::string result = stream.str();
+    if (result.find('.') != std::string::npos) {
+        while (!result.empty() && result.back() == '0')
+            result.pop_back();
+        if (!result.empty() && result.back() == '.')
+            result.pop_back();
+    }
+    return result;
+}
+
+std::string digits(int value, int width) {
+    std::ostringstream stream;
+    stream << std::setfill('0') << std::setw(width) << value;
+    return stream.str();
+}
+
+} // namespace
+
+std::string localized_axis_number(double value, int precision, Number_Locale locale) {
+    std::string result = fixed_number(value, precision);
+    if (locale.decimal_point != '.')
+        std::replace(result.begin(), result.end(), '.', locale.decimal_point);
+    return result;
+}
+
+std::string formatted_axis_time(Time_Of_Day time, std::string_view format) {
+    const auto total = time.milliseconds;
+    const int hours = static_cast<int>((total / 3'600'000) % 24);
+    const int minutes = static_cast<int>((total / 60'000) % 60);
+    const int seconds = static_cast<int>((total / 1'000) % 60);
+    const int milliseconds = static_cast<int>(total % 1'000);
+    std::string result;
+    for (std::size_t index = 0; index < format.size();) {
+        const std::string_view rest = format.substr(index);
+        if (rest.starts_with("zzz")) {
+            result += digits(milliseconds, 3);
+            index += 3;
+        } else if (rest.starts_with("hh") || rest.starts_with("HH")) {
+            result += digits(hours, 2);
+            index += 2;
+        } else if (rest.starts_with("mm")) {
+            result += digits(minutes, 2);
+            index += 2;
+        } else if (rest.starts_with("ss")) {
+            result += digits(seconds, 2);
+            index += 2;
+        } else {
+            result.push_back(format[index++]);
+        }
+    }
+    return result;
+}
+
+} // namespace renderive::detail