From aa031d1cbd1a6ca0d15ff72310e95600737f17c2 Mon Sep 17 00:00:00 2001
From: Thog
Date: Sat, 24 Sep 2016 15:21:51 +0200
Subject: Allow renaming method arguments where they're used (Fix #32)

---
 .../analysis/SourceIndexBehaviorVisitor.java       | 28 +++++++++++++++-------
 1 file changed, 19 insertions(+), 9 deletions(-)

diff --git a/src/main/java/cuchaz/enigma/analysis/SourceIndexBehaviorVisitor.java b/src/main/java/cuchaz/enigma/analysis/SourceIndexBehaviorVisitor.java
index 9a98b918..c328f5f1 100644
--- a/src/main/java/cuchaz/enigma/analysis/SourceIndexBehaviorVisitor.java
+++ b/src/main/java/cuchaz/enigma/analysis/SourceIndexBehaviorVisitor.java
@@ -10,20 +10,24 @@
  ******************************************************************************/
 package cuchaz.enigma.analysis;
 
-import com.strobel.assembler.metadata.*;
+import com.strobel.assembler.metadata.MemberReference;
+import com.strobel.assembler.metadata.MethodReference;
+import com.strobel.assembler.metadata.ParameterDefinition;
+import com.strobel.assembler.metadata.TypeReference;
 import com.strobel.decompiler.languages.TextLocation;
 import com.strobel.decompiler.languages.java.ast.*;
-
-import java.lang.Error;
-
 import cuchaz.enigma.mapping.*;
 
+import java.util.HashMap;
+import java.util.Map;
+
 public class SourceIndexBehaviorVisitor extends SourceIndexVisitor {
 
     private BehaviorEntry behaviorEntry;
 
     // TODO: Really fix Procyon index problem with inner classes
     private int argumentPosition;
+    private Map<String, Entry> argumentCache = new HashMap<>();
 
     public SourceIndexBehaviorVisitor(BehaviorEntry behaviorEntry) {
         this.behaviorEntry = behaviorEntry;
@@ -96,11 +100,15 @@ public class SourceIndexBehaviorVisitor extends SourceIndexVisitor {
     @Override
     public Void visitParameterDeclaration(ParameterDeclaration node, SourceIndex index) {
         ParameterDefinition def = node.getUserData(Keys.PARAMETER_DEFINITION);
-        if (def.getMethod() instanceof MemberReference)
-            if (def.getMethod() instanceof MethodReference)
-                index.addDeclaration(node.getNameToken(),
-                        new ArgumentEntry(ProcyonEntryFactory.getBehaviorEntry((MethodReference) def.getMethod()),
-                                argumentPosition++, node.getName()));
+        if (def.getMethod() instanceof MemberReference && def.getMethod() instanceof MethodReference)
+        {
+            ArgumentEntry argumentEntry = new ArgumentEntry(ProcyonEntryFactory.getBehaviorEntry((MethodReference) def.getMethod()),
+                    argumentPosition++, node.getName());
+            Identifier identifier = node.getNameToken();
+            // cache the argument entry and the identifier
+            argumentCache.put(identifier.getName(), argumentEntry);
+            index.addDeclaration(identifier, argumentEntry);
+        }
 
         return recurse(node, index);
     }
@@ -113,6 +121,8 @@ public class SourceIndexBehaviorVisitor extends SourceIndexVisitor {
             FieldEntry fieldEntry = new FieldEntry(classEntry, ref.getName(), new Type(ref.getErasedSignature()));
             index.addReference(node.getIdentifierToken(), fieldEntry, this.behaviorEntry);
         }
+        else if (argumentCache.containsKey(node.getIdentifier())) // If it's in the argument cache, create a token!
+            index.addDeclaration(node.getIdentifierToken(), argumentCache.get(node.getIdentifier()));
 
         return recurse(node, index);
     }
-- 
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