Initial implementation of "Rename Local Variable" refactoring.

editor/tools/plugins/com.google.dart.tools.ui/src/com/google/dart/tools/ui/internal/viewsupport/BasicElementLabels.java

Index: editor/tools/plugins/com.google.dart.tools.ui/src/com/google/dart/tools/ui/internal/viewsupport/BasicElementLabels.java
diff --git a/editor/tools/plugins/com.google.dart.tools.ui/src/com/google/dart/tools/ui/internal/viewsupport/BasicElementLabels.java b/editor/tools/plugins/com.google.dart.tools.ui/src/com/google/dart/tools/ui/internal/viewsupport/BasicElementLabels.java
new file mode 100644
index 0000000000000000000000000000000000000000..671ca41156c7b3597a84b15127056addfa392595
--- /dev/null
+++ b/editor/tools/plugins/com.google.dart.tools.ui/src/com/google/dart/tools/ui/internal/viewsupport/BasicElementLabels.java
@@ -0,0 +1,146 @@
+package com.google.dart.tools.ui.internal.viewsupport;
+
+import com.google.dart.tools.core.model.CompilationUnit;
+import com.google.dart.tools.ui.DartElementLabels;
+
+import org.eclipse.core.resources.IResource;
+import org.eclipse.core.runtime.IPath;
+import org.eclipse.ui.IWorkingSet;
+
+import java.io.File;
+
+/**
+ * A label provider for basic elements like paths.
+ */
+public class BasicElementLabels {
+
+  /**
+   * Returns a label for Dart code snippet used in a label. Example is 'Test test = new Test<?
+   * extends List>() { ...}'.
+   * 
+   * @param string the Dart code snippet
+   * @return the label for the Dart code snippet
+   */
+  public static String getDartCodeString(String string) {
+    // TODO(scheglov) inline this no-op method later
+    return string;
+  }
+
+  /**
+   * Returns a label for Dart element name. Example is 'new Test<? extends List>() { ...}'. This
+   * method should only be used for simple element names. Use {@link DartElementLabels} to create a
+   * label from a Dart element or {@link BindingLabelProvider} for labels of bindings.
+   * 
+   * @param name the Dart element name.
+   * @return the label for the Dart element
+   */
+  public static String getDartElementName(String name) {
+    // TODO(scheglov) inline this no-op method later
+    return name;
+  }
+
+  /**
+   * Returns a label for a type root name which is a file name.
+   * 
+   * @param unit the {@link CompilationUnit}
+   * @return the label of the resource name.
+   */
+  public static String getFileName(CompilationUnit unit) {
+    // TODO(scheglov) inline this method later
+    return unit.getElementName();
+  }
+
+  /**
+   * Returns the label for a file pattern like '*.dart'
+   * 
+   * @param name the pattern
+   * @return the label of the pattern.
+   */
+  public static String getFilePattern(String name) {
+    // TODO(scheglov) inline this no-op method later
+    return name;
+  }
+
+  /**
+   * Returns the label of the path of a file.
+   * 
+   * @param file the file
+   * @return the label of the file path to be used in the UI.
+   */
+  public static String getPathLabel(File file) {
+    // TODO(scheglov) inline this method later
+    return file.getAbsolutePath();
+  }
+
+  /**
+   * Returns the label of a path.
+   * 
+   * @param path the path
+   * @param isOSPath if <code>true</code>, the path represents an OS path, if <code>false</code> it
+   *          is a workspace path.
+   * @return the label of the path to be used in the UI.
+   */
+  public static String getPathLabel(IPath path, boolean isOSPath) {
+    if (isOSPath) {
+      return path.toOSString();
+    } else {
+      return path.makeRelative().toString();
+    }
+  }
+
+  /**
+   * Returns a label for a resource name.
+   * 
+   * @param resource the resource
+   * @return the label of the resource name.
+   */
+  public static String getResourceName(IResource resource) {
+    // TODO(scheglov) inline this method later
+    return resource.getName();
+  }
+
+  /**
+   * Returns a label for a resource name.
+   * 
+   * @param resourceName the resource name
+   * @return the label of the resource name.
+   */
+  public static String getResourceName(String resourceName) {
+    // TODO(scheglov) inline this method later
+    return resourceName;
+  }
+
+  /**
+   * Returns the label for a URL, URI or URL part. Example is 'http://www.x.xom/s.html#1'
+   * 
+   * @param name the URL string
+   * @return the label of the URL.
+   */
+  public static String getURLPart(String name) {
+    // TODO(scheglov) inline this method later
+    return name;
+  }
+
+  /**
+   * Returns a label for a version name. Example is '1.4.1'
+   * 
+   * @param name the version string
+   * @return the version label
+   */
+  public static String getVersionName(String name) {
+    // TODO(scheglov) inline this method later
+    return name;
+  }
+
+  /**
+   * Returns a label for a working set
+   * 
+   * @param set the working set
+   * @return the label of the working set
+   */
+  public static String getWorkingSetLabel(IWorkingSet set) {
+    // TODO(scheglov) inline this method later
+    return set.getLabel();
+  }
+
+}