remove XDG stuff and some dependency

src/yugecin/opsudance/utils/SimpleVersion.java

@@ -0,0 +1,67 @@
+/*
+ * opsu!dance - fork of opsu! with cursordance auto
+ * Copyright (C) 2018 yugecin
+ *
+ * opsu!dance is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * opsu!dance is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with opsu!dance.  If not, see <http://www.gnu.org/licenses/>.
+ */
+package yugecin.opsudance.utils;
+
+import itdelatrisu.opsu.Utils;
+import yugecin.opsudance.core.NotNull;
+import yugecin.opsudance.core.Nullable;
+
+public class SimpleVersion implements Comparable<SimpleVersion> {
+
+	@Nullable
+	public static SimpleVersion parse(@NotNull String version) {
+		int dashpos = version.indexOf('-');
+		if (dashpos != -1) {
+			version = version.substring(0, dashpos);
+		}
+		final String[] parts = version.split("\\.");
+		if (parts.length < 3) {
+			return null;
+		}
+		try {
+			return new SimpleVersion(
+				Integer.parseInt(parts[0]),
+				Integer.parseInt(parts[1]),
+				Integer.parseInt(parts[2])
+			);
+		} catch (Exception e) {
+			return null;
+		}
+	}
+
+	final int major, minor, incremental;
+
+	public SimpleVersion(int major, int minor, int incremental) {
+		this.major = major;
+		this.minor = minor;
+		this.incremental = incremental;
+	}
+
+	@Override
+	public int compareTo(@NotNull SimpleVersion o) {
+		return 
+			Utils.clamp(Integer.compare(major, o.major), -1, 1) * 100 + 
+			Utils.clamp(Integer.compare(minor, o.minor), -1, 1) * 10 + 
+			Utils.clamp(Integer.compare(incremental, o.incremental), -1, 1);
+	}
+
+	@Override
+	public String toString() {
+		return "" + major + '.' + minor + '.' + incremental;
+	}
+}