77 lines
2.9 KiB
Java
77 lines
2.9 KiB
Java
package io.gitlab.jfronny.libjf.unsafe.asm;
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import io.gitlab.jfronny.libjf.LibJf;
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import io.gitlab.jfronny.libjf.unsafe.asm.patch.Patch;
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import net.fabricmc.loader.api.FabricLoader;
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import net.fabricmc.loader.api.MappingResolver;
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import org.objectweb.asm.ClassReader;
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import org.objectweb.asm.ClassWriter;
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import org.objectweb.asm.tree.ClassNode;
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import org.spongepowered.asm.mixin.transformer.FabricMixinTransformerProxy;
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import org.spongepowered.asm.transformers.MixinClassWriter;
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import java.util.Set;
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public class AsmTransformer extends FabricMixinTransformerProxy {
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public static AsmTransformer INSTANCE;
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public static final MappingResolver MAPPING_RESOLVER = FabricLoader.getInstance().getMappingResolver();
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public static final String INTERMEDIARY = "intermediary";
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public FabricMixinTransformerProxy delegate;
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public Set<AsmConfig> asmConfigs;
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private AsmConfig currentConfig = null;
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@Override
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public byte[] transformClassBytes(String name, String transformedName, byte[] classBytes) {
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classBytes = delegate.transformClassBytes(name, transformedName, classBytes);
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if (classBytes == null || name == null)
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return classBytes;
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if (isClassUnmoddable(name, null))
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return classBytes;
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ClassNode klazz = new ClassNode();
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ClassReader reader = new ClassReader(classBytes);
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reader.accept(klazz, ClassReader.EXPAND_FRAMES); //ClassReader.SKIP_FRAMES | ClassReader.SKIP_DEBUG
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//if ((klazz.access & Opcodes.ACC_INTERFACE) != 0) {
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// return classBytes;
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//}
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for (AsmConfig config : asmConfigs) {
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currentConfig = config;
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if (!isClassUnmoddable(name, config)) {
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for (Patch patch : config.getPatches()) {
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patch.apply(klazz);
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}
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}
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}
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currentConfig = null;
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ClassWriter writer = new MixinClassWriter(reader, ClassWriter.COMPUTE_FRAMES | ClassWriter.COMPUTE_MAXS);
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try {
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klazz.accept(writer);
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}
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catch (NullPointerException t) {
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LibJf.LOGGER.error("Could not transform " + transformedName, t);
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return null;
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}
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classBytes = writer.toByteArray();
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return classBytes;
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}
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public boolean isClassUnmoddable(String className, AsmConfig config) {
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if (className.replace('/', '.').startsWith("org.objectweb.asm")
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//|| className.startsWith("net.fabricmc.loader")
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//|| className.startsWith("io.gitlab.jfronny.libjf.unsafe.asm")
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)
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return true;
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if (config == null) return false;
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Set<String> classes = config.skipClasses();
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if (classes == null) return false;
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return classes.contains(MAPPING_RESOLVER.unmapClassName(INTERMEDIARY, className));
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}
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public AsmConfig getCurrentConfig() {
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return currentConfig;
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}
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}
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