Add LocalResourceFinder.

Assets/Cryville/Crtr/Extensions/Quaver/QuaverChartFinder.cs

@@ -0,0 +1,24 @@
+using Cryville.Common;
+using Cryville.Crtr.Browsing;
+using Microsoft.Win32;
+using System;
+using System.IO;
+
+namespace Cryville.Crtr.Extensions.Quaver {
+	public class QuaverChartFinder : LocalResourceFinder {
+		public override string Name { get { return "Quaver beatmaps"; } }
+
+		public override string GetRootPath() {
+			switch (Environment.OSVersion.Platform) {
+				case PlatformID.Win32NT:
+					var reg = Registry.ClassesRoot.OpenSubKey(@"quaver\Shell\Open\Command");
+					if (reg == null) return null;
+					var pathObj = reg.GetValue(null);
+					if (pathObj == null) return null;
+					var path = (string)pathObj;
+					return Path.Combine(new FileInfo(StringUtils.GetProcessPathFromCommand(path)).Directory.FullName, "Songs");
+				default: return null;
+			}
+		}
+	}
+}