Add SimpleReader

src/main/java/net/fabricmc/mappingio/MappingReader.java

@@ -29,6 +29,7 @@
 import net.fabricmc.mappingio.format.EnigmaReader;
 import net.fabricmc.mappingio.format.MappingFormat;
 import net.fabricmc.mappingio.format.ProGuardReader;
+import net.fabricmc.mappingio.format.SimpleReader;
 import net.fabricmc.mappingio.format.SrgReader;
 import net.fabricmc.mappingio.format.Tiny1Reader;
 import net.fabricmc.mappingio.format.Tiny2Reader;
@@ -187,6 +188,9 @@ public static void read(Reader reader, MappingFormat format, MappingVisitor visi
 		case PROGUARD:
 			ProGuardReader.read(reader, visitor);
 			break;
+		case SIMPLE:
+			SimpleReader.read(reader, visitor);
+			break;
 		default:
 			throw new IllegalStateException();
 		}

src/main/java/net/fabricmc/mappingio/format/MappingFormat.java

@@ -24,7 +24,8 @@ public enum MappingFormat {
 	SRG("SRG", "srg", false, false, false, false, false),
 	TSRG("TSRG", "tsrg", false, false, false, false, false),
 	TSRG2("TSRG2", "tsrg", true, false, false, true, false),
-	PROGUARD("ProGuard", "map", false, true, false, false, false);
+	PROGUARD("ProGuard", "map", false, true, false, false, false),
+	SIMPLE("Simple", "txt", false, false, false, false, false);
 
 	MappingFormat(String name, String fileExt,
 			boolean hasNamespaces, boolean hasFieldDescriptors,

src/main/java/net/fabricmc/mappingio/format/SimpleReader.java

@@ -0,0 +1,59 @@
+/*
+ * Copyright (c) 2022 FabricMC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package net.fabricmc.mappingio.format;
+
+import net.fabricmc.mappingio.MappedElementKind;
+import net.fabricmc.mappingio.MappingVisitor;
+
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.Reader;
+
+public final class SimpleReader {
+
+	public static void read(Reader reader, MappingVisitor visitor) throws IOException {
+		BufferedReader br = reader instanceof BufferedReader ? (BufferedReader) reader : new BufferedReader(reader);
+		read(br, visitor);
+	}
+
+	public static void read(BufferedReader reader, MappingVisitor visitor) throws IOException {
+		String line;
+		while ((line = reader.readLine()) != null) {
+
+			String[] split = line.split(" ");
+			String obf = split[0];
+			String deobf = split[1];
+
+			if (!(line.contains(".") || line.contains("("))) {
+				if (visitor.visitClass(obf)) {
+					visitor.visitDstName(MappedElementKind.CLASS, 0, deobf);
+					visitor.visitElementContent(MappedElementKind.CLASS);
+				}
+			} else if (line.contains(".") && !line.contains("(")) {
+				if (visitor.visitField(obf.substring(obf.lastIndexOf(".") + 1), null)) {
+					visitor.visitDstName(MappedElementKind.FIELD, 0, deobf);
+					visitor.visitElementContent(MappedElementKind.FIELD);
+				}
+			} else if (line.contains(".") && line.contains("(")) {
+				if (visitor.visitMethod(obf.substring(obf.lastIndexOf(".") + 1, obf.lastIndexOf("(")), obf.substring(obf.lastIndexOf("(")))) {
+					visitor.visitDstName(MappedElementKind.METHOD, 0, deobf);
+					visitor.visitElementContent(MappedElementKind.METHOD);
+				}
+			}
+		}
+	}
+}