feat: Initial commit

Assets/Cryville.Common/Font/FontManager.cs

@@ -0,0 +1,64 @@
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+
+namespace Cryville.Common.Font {
+	public abstract class FontManager {
+		public IReadOnlyDictionary<string, Typeface> MapFullNameToTypeface { get; private set; }
+		public IReadOnlyDictionary<string, IReadOnlyCollection<Typeface>> MapNameToTypefaces { get; private set; }
+		public FontManager() {
+			var map1 = new Dictionary<string, Typeface>();
+			var map2 = new Dictionary<string, List<Typeface>>();
+			foreach (var f in EnumerateAllTypefaces()) {
+				if (!map1.ContainsKey(f.FullName)) {
+					map1.Add(f.FullName, f);
+				}
+				else {
+					continue;
+				}
+				List<Typeface> set2;
+				if (!map2.TryGetValue(f.FamilyName, out set2)) {
+					map2.Add(f.FamilyName, set2 = new List<Typeface>());
+				}
+				set2.Add(f);
+			}
+			MapFullNameToTypeface = map1;
+			MapNameToTypefaces = map2.ToDictionary(i => i.Key, i => (IReadOnlyCollection<Typeface>)i.Value);
+		}
+		protected abstract IEnumerable<Typeface> EnumerateAllTypefaces();
+		protected static IEnumerable<Typeface> ScanDirectoryForTypefaces(string dir) {
+			foreach (var f in new DirectoryInfo(dir).EnumerateFiles()) {
+				FontFile file;
+				try {
+					file = FontFile.Create(f);
+				}
+				catch (InvalidDataException) {
+					continue;
+				}
+				if (file == null) continue;
+				var enumerator = file.GetEnumerator();
+				while (enumerator.MoveNext()) {
+					Typeface ret;
+					try {
+						ret = enumerator.Current;
+					}
+					catch (InvalidDataException) {
+						continue;
+					}
+					yield return ret;
+				}
+				file.Close();
+			}
+		}
+	}
+	public class FontManagerAndroid : FontManager {
+		protected override IEnumerable<Typeface> EnumerateAllTypefaces() {
+			return ScanDirectoryForTypefaces("/system/fonts");
+		}
+	}
+	public class FontManagerWindows : FontManager {
+		protected override IEnumerable<Typeface> EnumerateAllTypefaces() {
+			return ScanDirectoryForTypefaces("C:/Windows/Fonts");
+		}
+	}
+}