Bug 16181 Tab key doesn't work in editor when 'Insert spaces for tabs' enabled
Using integration build 0515, pressing Tab in an editor window doesn't do anything when 'Insert spaces for tabs' is selected. The editor is marked as unsaved, but no spaces appear.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/javaeditor/CompilationUnitEditor.java
import org.eclipse.jdt.core.ICompilationUnit;
import org.eclipse.jdt.core.IJavaElement;
import org.eclipse.jdt.core.IJavaProject;
import org.eclipse.jdt.core.IPackageFragment;
import org.eclipse.jdt.core.IPackageFragmentRoot;
import org.eclipse.jdt.core.ISourceReference;
import org.eclipse.jdt.core.JavaCore;
import org.eclipse.jdt.core.JavaModelException;
import org.eclipse.jdt.ui.IWorkingCopyManager;
import org.eclipse.jdt.ui.actions.GenerateActionGroup;
import org.eclipse.jdt.ui.actions.IJavaEditorActionDefinitionIds;
import org.eclipse.jdt.ui.actions.RefactorActionGroup;
import org.eclipse.jdt.ui.text.JavaTextTools;
import org.eclipse.jdt.internal.ui.JavaPlugin;
import org.eclipse.jdt.internal.ui.actions.CompositeActionGroup;
import org.eclipse.jdt.internal.ui.compare.LocalHistoryActionGroup;
import org.eclipse.jdt.internal.ui.javaeditor.structureselection.SelectionHistory;
import org.eclipse.jdt.internal.ui.javaeditor.structureselection.StructureSelectEnclosingAction;
import org.eclipse.jdt.internal.ui.javaeditor.structureselection.StructureSelectHistoryAction;
import org.eclipse.jdt.internal.ui.javaeditor.structureselection.StructureSelectNextAction;
import org.eclipse.jdt.internal.ui.javaeditor.structureselection.StructureSelectPreviousAction;
import org.eclipse.jdt.internal.ui.javaeditor.structureselection.StructureSelectionAction;
import org.eclipse.jdt.internal.ui.preferences.JavaEditorPreferencePage;
import org.eclipse.jdt.internal.ui.text.ContentAssistPreference;
import org.eclipse.jdt.internal.ui.text.correction.JavaCorrectionSourceViewer;
import org.eclipse.jdt.internal.ui.text.java.IReconcilingParticipant;
/**
 * Java specific text editor.
 */
public class CompilationUnitEditor extends JavaEditor implements IReconcilingParticipant {