refactor: better place for removing parenthesis (PR #627)

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

@@ -24,11 +24,4 @@ public enum ArithOp {
 	public String getSymbol() {
 		return this.symbol;
 	}
-
-	public boolean noWrapWith(ArithOp other) {
-		return (this == ADD && other == ADD)
-				|| (this == MUL && other == MUL)
-				|| (this == AND && other == AND)
-				|| (this == OR && other == OR);
-	}
 }

jadx-core/src/main/java/jadx/core/dex/instructions/args/InsnArg.java

@@ -9,8 +9,6 @@ import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
 import jadx.core.dex.attributes.AFlag;
-import jadx.core.dex.instructions.ArithNode;
-import jadx.core.dex.instructions.InsnType;
 import jadx.core.dex.nodes.InsnNode;
 import jadx.core.utils.InsnUtils;
 
@@ -113,12 +111,6 @@ public abstract class InsnArg extends Typed {
 		insn.add(AFlag.WRAPPED);
 		InsnArg arg = wrapArg(insn);
 		parent.setArg(i, arg);
-
-		if (insn.getType() == InsnType.ARITH && parent.getType() == InsnType.ARITH
-				&& ((ArithNode) insn).getOp().noWrapWith(((ArithNode) parent).getOp())) {
-			insn.add(AFlag.DONT_WRAP);
-		}
-
 		return arg;
 	}
 

jadx-core/src/main/java/jadx/core/dex/visitors/PrepareForCodeGen.java

@@ -42,7 +42,7 @@ public class PrepareForCodeGen extends AbstractVisitor {
 			}
 			removeInstructions(block);
 			checkInline(block);
-//			removeParenthesis(block);
+			removeParenthesis(block);
 			modifyArith(block);
 		}
 	}
@@ -99,7 +99,7 @@ public class PrepareForCodeGen extends AbstractVisitor {
 
 	private static void removeParenthesis(BlockNode block) {
 		for (InsnNode insn : block.getInstructions()) {
-			checkInsn(insn);
+			removeParenthesis(insn);
 		}
 	}
 
@@ -107,17 +107,19 @@ public class PrepareForCodeGen extends AbstractVisitor {
 	 * Remove parenthesis for wrapped insn  in arith '+' or '-'
 	 * ('(a + b) +c' => 'a + b + c')
 	 */
-	private static void checkInsn(InsnNode insn) {
+	private static void removeParenthesis(InsnNode insn) {
 		if (insn.getType() == InsnType.ARITH) {
 			ArithNode arith = (ArithNode) insn;
 			ArithOp op = arith.getOp();
-			if (op == ArithOp.ADD || op == ArithOp.SUB) {
+			if (op == ArithOp.ADD || op == ArithOp.MUL || op == ArithOp.AND || op == ArithOp.OR) {
 				for (int i = 0; i < 2; i++) {
 					InsnArg arg = arith.getArg(i);
 					if (arg.isInsnWrap()) {
 						InsnNode wrapInsn = ((InsnWrapArg) arg).getWrapInsn();
-						wrapInsn.add(AFlag.DONT_WRAP);
-						checkInsn(wrapInsn);
+						if (wrapInsn.getType() == InsnType.ARITH && ((ArithNode) wrapInsn).getOp() == op) {
+							wrapInsn.add(AFlag.DONT_WRAP);
+						}
+						removeParenthesis(wrapInsn);
 					}
 				}
 			}
@@ -125,7 +127,7 @@ public class PrepareForCodeGen extends AbstractVisitor {
 			for (InsnArg arg : insn.getArguments()) {
 				if (arg.isInsnWrap()) {
 					InsnNode wrapInsn = ((InsnWrapArg) arg).getWrapInsn();
-					checkInsn(wrapInsn);
+					removeParenthesis(wrapInsn);
 				}
 			}
 		}