Initial implementation of "Rename Local Variable" refactoring.

editor/tools/plugins/com.google.dart.tools.ui/src/com/google/dart/tools/internal/corext/refactoring/rename/TempOccurrenceAnalyzer.java

Index: editor/tools/plugins/com.google.dart.tools.ui/src/com/google/dart/tools/internal/corext/refactoring/rename/TempOccurrenceAnalyzer.java
diff --git a/editor/tools/plugins/com.google.dart.tools.ui/src/com/google/dart/tools/internal/corext/refactoring/rename/TempOccurrenceAnalyzer.java b/editor/tools/plugins/com.google.dart.tools.ui/src/com/google/dart/tools/internal/corext/refactoring/rename/TempOccurrenceAnalyzer.java
new file mode 100644
index 0000000000000000000000000000000000000000..bf2df17a0ccd436b5775585e585826ddaf63d503
--- /dev/null
+++ b/editor/tools/plugins/com.google.dart.tools.ui/src/com/google/dart/tools/internal/corext/refactoring/rename/TempOccurrenceAnalyzer.java
@@ -0,0 +1,119 @@
+package com.google.dart.tools.internal.corext.refactoring.rename;
+
+import com.google.dart.compiler.ast.ASTVisitor;
+import com.google.dart.compiler.ast.DartIdentifier;
+import com.google.dart.compiler.ast.DartNode;
+import com.google.dart.compiler.ast.DartUnit;
+import com.google.dart.compiler.ast.DartVariable;
+import com.google.dart.compiler.resolver.Element;
+import com.google.dart.tools.internal.corext.dom.ASTNodes;
+
+import org.eclipse.core.runtime.Assert;
+
+import java.util.HashSet;
+import java.util.Iterator;
+import java.util.Set;
+
+public class TempOccurrenceAnalyzer extends ASTVisitor<Void> {
+  private Set<DartIdentifier> fReferenceNodes;
+//  private Set<DartIdentifier> fJavadocNodes;
+
+  private DartVariable fTempDeclaration;
+  private Element fTempBinding;
+
+//  private boolean fAnalyzeJavadoc;
+
+//  private boolean fIsInJavadoc;
+
+  public TempOccurrenceAnalyzer(DartVariable tempDeclaration/* , boolean analyzeJavadoc */) {
+    Assert.isNotNull(tempDeclaration);
+    fReferenceNodes = new HashSet<DartIdentifier>();
+//    fJavadocNodes = new HashSet<DartIdentifier>();
+//    fAnalyzeJavadoc = analyzeJavadoc;
+    fTempDeclaration = tempDeclaration;
+    fTempBinding = tempDeclaration.getElement();
+//    fIsInJavadoc = false;
+  }
+
+//  @Override
+//  public void endVisit(Javadoc node) {
+//    fIsInJavadoc = false;
+//  }
+
+//  public DartIdentifier[] getJavadocNodes() {
+//    return fJavadocNodes.toArray(new DartIdentifier[fJavadocNodes.size()]);
+//  }
+
+  public int getNumberOfReferences() {
+    return fReferenceNodes.size();
+  }
+
+  public DartIdentifier[] getReferenceAndDeclarationNodes() {
+    DartIdentifier[] nodes = fReferenceNodes.toArray(new DartIdentifier[fReferenceNodes.size() + 1]);
+    nodes[fReferenceNodes.size()] = fTempDeclaration.getName();
+    return nodes;
+  }
+
+  public int[] getReferenceAndJavadocOffsets() {
+    int[] offsets = new int[fReferenceNodes.size()];
+    addOffsets(offsets, 0, fReferenceNodes);
+//    int[] offsets = new int[fReferenceNodes.size() + fJavadocNodes.size()];
+//    addOffsets(offsets, 0, fReferenceNodes);
+//    addOffsets(offsets, fReferenceNodes.size(), fJavadocNodes);
+    return offsets;
+  }
+
+  public DartIdentifier[] getReferenceNodes() {
+    return fReferenceNodes.toArray(new DartIdentifier[fReferenceNodes.size()]);
+  }
+
+  public int[] getReferenceOffsets() {
+    int[] offsets = new int[fReferenceNodes.size()];
+    addOffsets(offsets, 0, fReferenceNodes);
+    return offsets;
+  }
+
+  public void perform() {
+    DartNode cuNode = ASTNodes.getParent(fTempDeclaration, DartUnit.class);
+    cuNode.accept(this);
+  }
+
+  //------- visit ------ (don't call)
+
+  @Override
+  public Void visitIdentifier(DartIdentifier node) {
+    if (node.getParent() instanceof DartVariable) {
+      if (((DartVariable) node.getParent()).getName() == node) {
+        return super.visitIdentifier(node);
+//        return true; //don't include declaration
+      }
+    }
+
+    if (fTempBinding != null && fTempBinding == node.getElement()) {
+      fReferenceNodes.add(node);
+//      if (fIsInJavadoc) {
+//        fJavadocNodes.add(node);
+//      } else {
+//        fReferenceNodes.add(node);
+//      }
+    }
+
+    return super.visitIdentifier(node);
+  }
+
+//  @Override
+//  public boolean visit(Javadoc node) {
+//    if (fAnalyzeJavadoc) {
+//      fIsInJavadoc = true;
+//    }
+//    return fAnalyzeJavadoc;
+//  }
+
+  private void addOffsets(int[] offsets, int start, Set<DartIdentifier> nodeSet) {
+    int i = start;
+    for (Iterator<DartIdentifier> iter = nodeSet.iterator(); iter.hasNext(); i++) {
+      DartNode node = iter.next();
+      offsets[i] = node.getSourceInfo().getOffset();
+    }
+  }
+}