1 files changed, 231 insertions, 0 deletions
diff --git a/src/platform/Color.cpp b/src/platform/Color.cpp
new file mode 100644
index 00000000..325cf413
--- /dev/null
+++ b/src/platform/Color.cpp
@@ -0,0 +1,231 @@
+#include "cru/platform/Color.hpp"
+
+#include <cstdint>
+#include <optional>
+#include <stdexcept>
+#include <string_view>
+#include "gsl/gsl_util"
+
+namespace cru::platform {
+std::optional<Color> Color::Parse(std::u16string_view string,
+                                  bool parse_predefined_color) {
+  if (parse_predefined_color) {
+    auto optional_predefined_color = GetPredefinedColorByName(string);
+    if (optional_predefined_color) {
+      return *optional_predefined_color;
+    }
+  }
+
+  auto get_num = [](char16_t c) -> std::optional<int> {
+    if (c >= u'0' && c <= u'9') return c - u'0';
+    if (c >= u'A' && c <= u'F') return c - u'A' + 10;
+    if (c >= u'a' && c <= u'f') return c - u'a' + 10;
+    return std::nullopt;
+  };
+
+  auto get_num_for_two_digit =
+      [get_num](std::u16string_view str) -> std::optional<int> {
+    int num = 0;
+    auto d1 = get_num(str[0]);
+    if (!d1) return std::nullopt;
+    num += *d1 * 16;
+    auto d2 = get_num(str[1]);
+    if (!d2) return std::nullopt;
+    num += *d2;
+    return num;
+  };
+
+  const auto string_size = string.size();
+
+  if (string_size == 7) {
+    if (string[0] != u'#') return std::nullopt;
+    auto r = get_num_for_two_digit(string.substr(1, 2));
+    if (!r) return std::nullopt;
+    auto g = get_num_for_two_digit(string.substr(3, 2));
+    if (!g) return std::nullopt;
+    auto b = get_num_for_two_digit(string.substr(5, 2));
+    if (!b) return std::nullopt;
+    return Color(gsl::narrow_cast<std::uint8_t>(*r),
+                 gsl::narrow_cast<std::uint8_t>(*g),
+                 gsl::narrow_cast<std::uint8_t>(*b));
+  } else if (string_size == 9) {
+    if (string[0] != u'#') return std::nullopt;
+    auto a = get_num_for_two_digit(string.substr(1, 2));
+    if (!a) return std::nullopt;
+    auto r = get_num_for_two_digit(string.substr(3, 2));
+    if (!r) return std::nullopt;
+    auto g = get_num_for_two_digit(string.substr(5, 2));
+    if (!g) return std::nullopt;
+    auto b = get_num_for_two_digit(string.substr(7, 2));
+    if (!b) return std::nullopt;
+    return Color(
+        gsl::narrow_cast<std::uint8_t>(*r), gsl::narrow_cast<std::uint8_t>(*g),
+        gsl::narrow_cast<std::uint8_t>(*b), gsl::narrow_cast<std::uint8_t>(*a));
+  } else {
+    return std::nullopt;
+  }
+}
+
+namespace details {
+const std::unordered_map<std::u16string_view, Color> predefined_name_color_map{
+    {u"transparent", colors::transparent},
+    {u"black", colors::black},
+    {u"silver", colors::silver},
+    {u"gray", colors::gray},
+    {u"white", colors::white},
+    {u"maroon", colors::maroon},
+    {u"red", colors::red},
+    {u"purple", colors::purple},
+    {u"fuchsia", colors::fuchsia},
+    {u"green", colors::green},
+    {u"lime", colors::lime},
+    {u"olive", colors::olive},
+    {u"yellow", colors::yellow},
+    {u"navy", colors::navy},
+    {u"blue", colors::blue},
+    {u"teal", colors::teal},
+    {u"aqua", colors::aqua},
+    {u"orange", colors::orange},
+    {u"aliceblue", colors::aliceblue},
+    {u"antiquewhite", colors::antiquewhite},
+    {u"aquamarine", colors::aquamarine},
+    {u"azure", colors::azure},
+    {u"beige", colors::beige},
+    {u"bisque", colors::bisque},
+    {u"blanchedalmond", colors::blanchedalmond},
+    {u"blueviolet", colors::blueviolet},
+    {u"brown", colors::brown},
+    {u"burlywood", colors::burlywood},
+    {u"cadetblue", colors::cadetblue},
+    {u"chartreuse", colors::chartreuse},
+    {u"chocolate", colors::chocolate},
+    {u"coral", colors::coral},
+    {u"cornflowerblue", colors::cornflowerblue},
+    {u"cornsilk", colors::cornsilk},
+    {u"crimson", colors::crimson},
+    {u"cyan", colors::cyan},
+    {u"darkblue", colors::darkblue},
+    {u"darkcyan", colors::darkcyan},
+    {u"darkgoldenrod", colors::darkgoldenrod},
+    {u"darkgray", colors::darkgray},
+    {u"darkgreen", colors::darkgreen},
+    {u"darkgrey", colors::darkgrey},
+    {u"darkkhaki", colors::darkkhaki},
+    {u"darkmagenta", colors::darkmagenta},
+    {u"darkolivegreen", colors::darkolivegreen},
+    {u"darkorange", colors::darkorange},
+    {u"darkorchid", colors::darkorchid},
+    {u"darkred", colors::darkred},
+    {u"darksalmon", colors::darksalmon},
+    {u"darkseagreen", colors::darkseagreen},
+    {u"darkslateblue", colors::darkslateblue},
+    {u"darkslategray", colors::darkslategray},
+    {u"darkslategrey", colors::darkslategrey},
+    {u"darkturquoise", colors::darkturquoise},
+    {u"darkviolet", colors::darkviolet},
+    {u"deeppink", colors::deeppink},
+    {u"deepskyblue", colors::deepskyblue},
+    {u"dimgray", colors::dimgray},
+    {u"dimgrey", colors::dimgrey},
+    {u"dodgerblue", colors::dodgerblue},
+    {u"firebrick", colors::firebrick},
+    {u"floralwhite", colors::floralwhite},
+    {u"forestgreen", colors::forestgreen},
+    {u"gainsboro", colors::gainsboro},
+    {u"ghostwhite", colors::ghostwhite},
+    {u"gold", colors::gold},
+    {u"goldenrod", colors::goldenrod},
+    {u"greenyellow", colors::greenyellow},
+    {u"grey", colors::grey},
+    {u"honeydew", colors::honeydew},
+    {u"hotpink", colors::hotpink},
+    {u"indianred", colors::indianred},
+    {u"indigo", colors::indigo},
+    {u"ivory", colors::ivory},
+    {u"khaki", colors::khaki},
+    {u"lavender", colors::lavender},
+    {u"lavenderblush", colors::lavenderblush},
+    {u"lawngreen", colors::lawngreen},
+    {u"lemonchiffon", colors::lemonchiffon},
+    {u"lightblue", colors::lightblue},
+    {u"lightcoral", colors::lightcoral},
+    {u"lightcyan", colors::lightcyan},
+    {u"lightgoldenrodyellow", colors::lightgoldenrodyellow},
+    {u"lightgray", colors::lightgray},
+    {u"lightgreen", colors::lightgreen},
+    {u"lightgrey", colors::lightgrey},
+    {u"lightpink", colors::lightpink},
+    {u"lightsalmon", colors::lightsalmon},
+    {u"lightseagreen", colors::lightseagreen},
+    {u"lightskyblue", colors::lightskyblue},
+    {u"lightslategray", colors::lightslategray},
+    {u"lightslategrey", colors::lightslategrey},
+    {u"lightsteelblue", colors::lightsteelblue},
+    {u"lightyellow", colors::lightyellow},
+    {u"limegreen", colors::limegreen},
+    {u"linen", colors::linen},
+    {u"magenta", colors::magenta},
+    {u"mediumaquamarine", colors::mediumaquamarine},
+    {u"mediumblue", colors::mediumblue},
+    {u"mediumorchid", colors::mediumorchid},
+    {u"mediumpurple", colors::mediumpurple},
+    {u"mediumseagreen", colors::mediumseagreen},
+    {u"mediumslateblue", colors::mediumslateblue},
+    {u"mediumspringgreen", colors::mediumspringgreen},
+    {u"mediumturquoise", colors::mediumturquoise},
+    {u"mediumvioletred", colors::mediumvioletred},
+    {u"midnightblue", colors::midnightblue},
+    {u"mintcream", colors::mintcream},
+    {u"mistyrose", colors::mistyrose},
+    {u"moccasin", colors::moccasin},
+    {u"navajowhite", colors::navajowhite},
+    {u"oldlace", colors::oldlace},
+    {u"olivedrab", colors::olivedrab},
+    {u"orangered", colors::orangered},
+    {u"orchid", colors::orchid},
+    {u"palegoldenrod", colors::palegoldenrod},
+    {u"palegreen", colors::palegreen},
+    {u"paleturquoise", colors::paleturquoise},
+    {u"palevioletred", colors::palevioletred},
+    {u"papayawhip", colors::papayawhip},
+    {u"peachpuff", colors::peachpuff},
+    {u"peru", colors::peru},
+    {u"pink", colors::pink},
+    {u"plum", colors::plum},
+    {u"powderblue", colors::powderblue},
+    {u"rosybrown", colors::rosybrown},
+    {u"royalblue", colors::royalblue},
+    {u"saddlebrown", colors::saddlebrown},
+    {u"salmon", colors::salmon},
+    {u"sandybrown", colors::sandybrown},
+    {u"seagreen", colors::seagreen},
+    {u"seashell", colors::seashell},
+    {u"sienna", colors::sienna},
+    {u"skyblue", colors::skyblue},
+    {u"slateblue", colors::slateblue},
+    {u"slategray", colors::slategray},
+    {u"slategrey", colors::slategrey},
+    {u"snow", colors::snow},
+    {u"springgreen", colors::springgreen},
+    {u"steelblue", colors::steelblue},
+    {u"tan", colors::tan},
+    {u"thistle", colors::thistle},
+    {u"tomato", colors::tomato},
+    {u"turquoise", colors::turquoise},
+    {u"violet", colors::violet},
+    {u"wheat", colors::wheat},
+    {u"whitesmoke", colors::whitesmoke},
+    {u"yellowgreen", colors::yellowgreen},
+    {u"rebeccapurple", colors::rebeccapurple},
+};
+}  // namespace details
+
+std::optional<Color> GetPredefinedColorByName(std::u16string_view name) {
+  auto result = details::predefined_name_color_map.find(name);
+  if (result != details::predefined_name_color_map.cend()) {
+    return result->second;
+  } else {
+    return std::nullopt;
+  }
+}
+}  // namespace cru::platform