Bug 219901 [Undo] new file creation subjec to Undo (file deleted without warning)
when creating a new file by right clicking on your project in the project explorer new->file this action is put on the undo/redo stack. Pressing Ctrl-Z to undo this action will thus delete your file. As this stack is separate from the stack in the editor , one can create a new file, work for a long time, then inadvertently press ctrl-z to undo a code change while having the focus on the project explorer and irrevocably lose their file. Redo will create a new EMPTY file; the work is gone, forever. This appears to only work for the "new file", not for "new->source file" etc. Although some may perceive this as a feature, it is hard to imagine a scenario where ctrl-z should permanently delete a file without warning.
bundles/org.eclipse.ui.ide/extensions/org/eclipse/ui/dialogs/WizardNewFileCreationPage.java
import org.eclipse.swt.widgets.Shell;
import org.eclipse.ui.PlatformUI;
import org.eclipse.ui.ide.undo.CreateFileOperation;
import org.eclipse.ui.ide.undo.WorkspaceUndoUtil;
import org.eclipse.ui.internal.ide.IDEWorkbenchMessages;
import org.eclipse.ui.internal.ide.IDEWorkbenchPlugin;
import org.eclipse.ui.internal.ide.IIDEHelpContextIds;
import org.eclipse.ui.internal.ide.dialogs.CreateLinkedResourceGroup;
import org.eclipse.ui.internal.ide.misc.ResourceAndContainerGroup;
/**
 * Standard main page for a wizard that creates a file resource.
 * <p>
 * This page may be used by clients as-is; it may be also be subclassed to suit.
 * </p>
 * <p>
 * Subclasses may override
 * <ul>
 * <li><code>getInitialContents</code></li>
 * <li><code>getNewFileLabel</code></li>
 * </ul>
 * </p>
 * <p>
 * Subclasses may extend
 * <ul>
 * <li><code>handleEvent</code></li>
 * </ul>
 * </p>
 */
public class WizardNewFileCreationPage extends WizardPage implements Listener {
	private static final int SIZING_CONTAINER_GROUP_HEIGHT = 250;