字体预览工具 v1.0.0 初始版本

2026-09-19 23:50:45 +08:00
commit 1883e9ba77
50 changed files with 5959 additions and 0 deletions
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+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Text;
+using System.Windows.Forms;
+
+namespace FontPreview
+{
+	/// <summary>
+	/// 字体清单缓存：首次扫描后落盘，后续启动直接读缓存秒显，
+	/// 后台再按 文件路径/大小/修改时间 做增量对比，未变化的不重新解析。
+	/// </summary>
+	public class FontCache
+	{
+		public struct Stamp
+		{
+			public long Size;
+			public long Mtime;
+		}
+
+		public string RootDir;
+		public List<FontItem> Items = new List<FontItem>();
+		public Dictionary<string, Stamp> Stamps = new Dictionary<string, Stamp>(StringComparer.OrdinalIgnoreCase);
+
+		private static string CachePath => Path.Combine(Path.GetDirectoryName(Application.ExecutablePath), "fontcache.txt");
+
+		public static bool TryLoad(string rootDir, out FontCache cache)
+		{
+			cache = null;
+			try
+			{
+				if (!File.Exists(CachePath)) return false;
+				string[] lines = File.ReadAllLines(CachePath, Encoding.UTF8);
+				if (lines.Length < 2 || lines[0] != "#FontCache v1") return false;
+				string rd = null;
+				for (int i = 0; i < lines.Length; i++)
+				{
+					if (lines[i].StartsWith("rootdir=")) { rd = lines[i].Substring(8).Trim(); break; }
+				}
+				if (rd == null || !string.Equals(rd, rootDir.Trim(), StringComparison.OrdinalIgnoreCase)) return false;
+
+				FontCache c = new FontCache();
+				c.RootDir = rootDir;
+				for (int i = 0; i < lines.Length; i++)
+				{
+					string l = lines[i];
+					if (string.IsNullOrEmpty(l) || l[0] == '#' || l.StartsWith("rootdir=")) continue;
+					string[] p = l.Split('\t');
+					if (p.Length < 6) continue;
+					FontItem it = new FontItem { Cat = p[0], Path = p[1], Name = p[2], DisplayName = p[3] };
+					c.Items.Add(it);
+					long size, mt;
+					if (long.TryParse(p[4], out size) && long.TryParse(p[5], out mt))
+					{
+						c.Stamps[it.Path] = new Stamp { Size = size, Mtime = mt };
+					}
+				}
+				if (c.Items.Count == 0) return false;
+				cache = c;
+				return true;
+			}
+			catch { return false; }
+		}
+
+		public static void Save(FontCache c)
+		{
+			try
+			{
+				StringBuilder sb = new StringBuilder();
+				sb.AppendLine("#FontCache v1");
+				sb.AppendLine("rootdir=" + c.RootDir);
+				foreach (FontItem it in c.Items)
+				{
+					Stamp st;
+					c.Stamps.TryGetValue(it.Path, out st);
+					string dn = (it.DisplayName ?? "").Replace("\t", " ");
+					sb.Append(it.Cat).Append('\t').Append(it.Path).Append('\t')
+					  .Append(it.Name).Append('\t').Append(dn).Append('\t')
+					  .Append(st.Size).Append('\t').Append(st.Mtime).Append('\n');
+				}
+				string tmp = CachePath + ".tmp";
+				File.WriteAllText(tmp, sb.ToString(), new UTF8Encoding(false));
+				if (File.Exists(CachePath)) { File.Copy(tmp, CachePath, true); File.Delete(tmp); }
+				else { File.Move(tmp, CachePath); }
+			}
+			catch { }
+		}
+	}
+}