Initial implementation of "Rename Local Variable" refactoring.

editor/tools/plugins/com.google.dart.tools.ui/src/com/google/dart/tools/ui/internal/refactoring/UserInterfaceStarter.java

Index: editor/tools/plugins/com.google.dart.tools.ui/src/com/google/dart/tools/ui/internal/refactoring/UserInterfaceStarter.java
diff --git a/editor/tools/plugins/com.google.dart.tools.ui/src/com/google/dart/tools/ui/internal/refactoring/UserInterfaceStarter.java b/editor/tools/plugins/com.google.dart.tools.ui/src/com/google/dart/tools/ui/internal/refactoring/UserInterfaceStarter.java
new file mode 100644
index 0000000000000000000000000000000000000000..09e3cd66f175e4f1b1654424552a642efc1bd418
--- /dev/null
+++ b/editor/tools/plugins/com.google.dart.tools.ui/src/com/google/dart/tools/ui/internal/refactoring/UserInterfaceStarter.java
@@ -0,0 +1,46 @@
+package com.google.dart.tools.ui.internal.refactoring;
+
+import com.google.dart.tools.ui.internal.refactoring.actions.RefactoringStarter;
+
+import org.eclipse.core.runtime.CoreException;
+import org.eclipse.ltk.core.refactoring.Refactoring;
+import org.eclipse.ltk.ui.refactoring.RefactoringWizard;
+import org.eclipse.swt.widgets.Shell;
+
+/**
+ * Opens the user interface for a given refactoring.
+ */
+public class UserInterfaceStarter {
+
+  private RefactoringWizard fWizard;
+
+  /**
+   * Actually activates the user interface. This default implementation assumes that the
+   * configuration element passed to <code>initialize
+   * </code> has an attribute wizard denoting the wizard class to be used for the given refactoring.
+   * <p>
+   * Subclasses may override to open a different user interface
+   * 
+   * @param refactoring the refactoring for which the user interface should be opened
+   * @param parent the parent shell to be used
+   * @param saveMode a save mode from {@link RefactoringSaveHelper}
+   * @return <code>true</code> iff the refactoring was executed, <code>false</code> otherwise
+   * @exception CoreException if the user interface can't be activated
+   */
+  public boolean activate(Refactoring refactoring, Shell parent, int saveMode) throws CoreException {
+    String title = fWizard.getDefaultPageTitle();
+    if (title == null) {
+      title = ""; //$NON-NLS-1$
+    }
+    return new RefactoringStarter().activate(fWizard, parent, title, saveMode);
+  }
+
+  /**
+   * Initializes this user interface starter with the given wizard.
+   * 
+   * @param wizard the refactoring wizard to use
+   */
+  public void initialize(RefactoringWizard wizard) {
+    fWizard = wizard;
+  }
+}