65 lines
2.0 KiB
C#
65 lines
2.0 KiB
C#
using System.Collections.Generic;
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using System.IO;
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using System.Linq;
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namespace Cryville.Common.Font {
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public abstract class FontManager {
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public IReadOnlyDictionary<string, Typeface> MapFullNameToTypeface { get; private set; }
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public IReadOnlyDictionary<string, IReadOnlyCollection<Typeface>> MapNameToTypefaces { get; private set; }
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public FontManager() {
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var map1 = new Dictionary<string, Typeface>();
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var map2 = new Dictionary<string, List<Typeface>>();
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foreach (var f in EnumerateAllTypefaces()) {
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if (!map1.ContainsKey(f.FullName)) {
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map1.Add(f.FullName, f);
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}
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else {
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Shared.Logger.Log(3, "UI", "Discarding a font with a duplicate full name {0}", f.FullName);
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continue;
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}
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if (!map2.TryGetValue(f.FamilyName, out List<Typeface> set2)) {
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map2.Add(f.FamilyName, set2 = new List<Typeface>());
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}
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set2.Add(f);
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}
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MapFullNameToTypeface = map1;
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MapNameToTypefaces = map2.ToDictionary(i => i.Key, i => (IReadOnlyCollection<Typeface>)i.Value);
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}
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protected abstract IEnumerable<Typeface> EnumerateAllTypefaces();
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protected static IEnumerable<Typeface> ScanDirectoryForTypefaces(string dir) {
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foreach (var f in new DirectoryInfo(dir).EnumerateFiles()) {
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FontFile file;
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try {
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file = FontFile.Create(f);
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}
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catch (InvalidDataException) {
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continue;
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}
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if (file == null) continue;
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var enumerator = file.GetEnumerator();
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while (enumerator.MoveNext()) {
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Typeface ret;
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try {
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ret = enumerator.Current;
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}
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catch (InvalidDataException) {
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continue;
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}
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yield return ret;
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}
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file.Close();
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}
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}
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}
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public class FontManagerAndroid : FontManager {
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protected override IEnumerable<Typeface> EnumerateAllTypefaces() {
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return ScanDirectoryForTypefaces("/system/fonts");
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}
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}
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public class FontManagerWindows : FontManager {
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protected override IEnumerable<Typeface> EnumerateAllTypefaces() {
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return ScanDirectoryForTypefaces("C:/Windows/Fonts");
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}
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}
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}
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