net.fabricmc.base.transformer.AccessTransformer.java Source code

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Here is the source code for net.fabricmc.base.transformer.AccessTransformer.java

Source

/*
 * Copyright 2016 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.base.transformer;

import net.minecraft.launchwrapper.IClassTransformer;
import org.objectweb.asm.ClassReader;
import org.objectweb.asm.ClassWriter;
import org.objectweb.asm.Opcodes;
import org.objectweb.asm.tree.ClassNode;
import org.objectweb.asm.tree.FieldNode;
import org.objectweb.asm.tree.MethodNode;

public class AccessTransformer implements IClassTransformer {

    //Very basic make everything public access transformer, when we have a file format this will read from that and not do this.
    @Override
    public byte[] transform(String name, String transformedName, byte[] bytes) {
        if (!name.startsWith("net.minecraft")) {
            return bytes;
        }
        ClassNode classNode = new ClassNode();
        ClassReader classReader = new ClassReader(bytes);
        classReader.accept(classNode, 0);
        boolean isClassProtected = classNode.access == Opcodes.ACC_PROTECTED;
        boolean isClassPrivate = classNode.access == Opcodes.ACC_PRIVATE;
        if (isClassProtected || isClassPrivate) {
            classNode.access = Opcodes.ACC_PUBLIC;
        }
        for (MethodNode method : classNode.methods) {
            boolean isProtected = method.access == Opcodes.ACC_PROTECTED;
            boolean isPrivate = method.access == Opcodes.ACC_PRIVATE;
            if (isProtected || isPrivate) {
                method.access = Opcodes.ACC_PUBLIC;
            }
        }
        for (FieldNode field : classNode.fields) {
            boolean isProtected = field.access == Opcodes.ACC_PROTECTED;
            boolean isPrivate = field.access == Opcodes.ACC_PRIVATE;
            if (isProtected || isPrivate) {
                field.access = Opcodes.ACC_PUBLIC;
            }
        }
        ClassWriter writer = new ClassWriter(ClassWriter.COMPUTE_MAXS);
        classNode.accept(writer);
        return writer.toByteArray();
    }
}