core: add method for copy instruction nodes

jadx-core/build.gradle

@@ -9,6 +9,7 @@ dependencies {
     compile 'commons-io:commons-io:2.4'
     compile 'org.ow2.asm:asm:5.0.3'
     compile 'com.intellij:annotations:12.0'
+    compile 'uk.com.robust-it:cloning:1.9.2'
 
     testCompile 'org.smali:smali:2.0.3'
 }

jadx-core/src/main/java/jadx/core/dex/attributes/nodes/LineAttrNode.java

@@ -23,4 +23,9 @@ public abstract class LineAttrNode extends AttrNode {
 	public void setDecompiledLine(int decompiledLine) {
 		this.decompiledLine = decompiledLine;
 	}
+
+	public void copyLines(LineAttrNode lineAttrNode) {
+		setSourceLine(lineAttrNode.getSourceLine());
+		setDecompiledLine(lineAttrNode.getDecompiledLine());
+	}
 }

jadx-core/src/main/java/jadx/core/dex/instructions/ConstClassNode.java

@@ -16,6 +16,11 @@ public final class ConstClassNode extends InsnNode {
 		return clsType;
 	}
 
+	@Override
+	public InsnNode copy() {
+		return copyCommonParams(new ConstClassNode(clsType));
+	}
+
 	@Override
 	public boolean isSame(InsnNode obj) {
 		if (this == obj) {

jadx-core/src/main/java/jadx/core/dex/instructions/ConstStringNode.java

@@ -15,6 +15,11 @@ public final class ConstStringNode extends InsnNode {
 		return str;
 	}
 
+	@Override
+	public InsnNode copy() {
+		return copyCommonParams(new ConstStringNode(str));
+	}
+
 	@Override
 	public boolean isSame(InsnNode obj) {
 		if (this == obj) {

jadx-core/src/main/java/jadx/core/dex/instructions/IndexInsnNode.java

@@ -16,6 +16,11 @@ public class IndexInsnNode extends InsnNode {
 		return index;
 	}
 
+	@Override
+	public IndexInsnNode copy() {
+		return copyCommonParams(new IndexInsnNode(insnType, index, getArgsCount()));
+	}
+
 	@Override
 	public boolean isSame(InsnNode obj) {
 		if (this == obj) {

jadx-core/src/main/java/jadx/core/dex/instructions/InvokeNode.java

@@ -36,6 +36,12 @@ public class InvokeNode extends InsnNode {
 		}
 	}
 
+	private InvokeNode(MethodInfo mth, InvokeType invokeType, int argsCount) {
+		super(InsnType.INVOKE, argsCount);
+		this.mth = mth;
+		this.type = invokeType;
+	}
+
 	public InvokeType getInvokeType() {
 		return type;
 	}
@@ -44,6 +50,11 @@ public class InvokeNode extends InsnNode {
 		return mth;
 	}
 
+	@Override
+	public InsnNode copy() {
+		return copyCommonParams(new InvokeNode(mth, type, getArgsCount()));
+	}
+
 	@Override
 	public boolean isSame(InsnNode obj) {
 		if (this == obj) {

jadx-core/src/main/java/jadx/core/dex/nodes/InsnNode.java

@@ -5,7 +5,10 @@ import jadx.core.dex.instructions.InsnType;
 import jadx.core.dex.instructions.args.ArgType;
 import jadx.core.dex.instructions.args.InsnArg;
 import jadx.core.dex.instructions.args.InsnWrapArg;
+import jadx.core.dex.instructions.args.LiteralArg;
+import jadx.core.dex.instructions.args.NamedArg;
 import jadx.core.dex.instructions.args.RegisterArg;
+import jadx.core.dex.instructions.args.SSAVar;
 import jadx.core.utils.InsnUtils;
 import jadx.core.utils.Utils;
 
@@ -14,9 +17,17 @@ import java.util.Collections;
 import java.util.List;
 
 import com.android.dx.io.instructions.DecodedInstruction;
+import com.rits.cloning.Cloner;
 
 public class InsnNode extends LineAttrNode {
 
+	private static final Cloner INSN_CLONER = new Cloner();
+
+	static {
+		INSN_CLONER.dontClone(ArgType.class, SSAVar.class, LiteralArg.class, NamedArg.class);
+		INSN_CLONER.dontCloneInstanceOf(RegisterArg.class);
+	}
+
 	protected final InsnType insnType;
 
 	private RegisterArg result;
@@ -228,4 +239,31 @@ public class InsnNode extends LineAttrNode {
 				&& arguments.size() == other.arguments.size();
 	}
 
+	protected <T extends InsnNode> T copyCommonParams(T copy) {
+		copy.setResult(result);
+		if (copy.getArgsCount() == 0) {
+			for (InsnArg arg : this.getArguments()) {
+				if (arg.isInsnWrap()) {
+					InsnNode wrapInsn = ((InsnWrapArg) arg).getWrapInsn();
+					copy.addArg(InsnArg.wrapArg(wrapInsn.copy()));
+				} else {
+					copy.addArg(arg);
+				}
+			}
+		}
+		copy.copyAttributesFrom(this);
+		copy.copyLines(this);
+		copy.setOffset(this.getOffset());
+		return copy;
+	}
+
+	/**
+	 * Make copy of InsnNode object.
+	 */
+	public InsnNode copy() {
+		if (this.getClass() == InsnNode.class) {
+			return copyCommonParams(new InsnNode(insnType, getArgsCount()));
+		}
+		return INSN_CLONER.deepClone(this);
+	}
 }