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/src/org/eclipse/ui/wizards/newresource/BasicNewProjectResourceWizard.java
}
		}
	}
	/**
	 * Prompts the user for whether to switch perspectives.
	 * 
	 * @param window
	 *            The workbench window in which to switch perspectives; must not
	 *            be <code>null</code>
	 * @param finalPersp
	 *            The perspective to switch to; must not be <code>null</code>.
	 * 
	 * @return <code>true</code> if it's OK to switch, <code>false</code>
	 *         otherwise
	 */
	private static boolean confirmPerspectiveSwitch(IWorkbenchWindow window,
			IPerspectiveDescriptor finalPersp) {
		IPreferenceStore store = IDEWorkbenchPlugin.getDefault()
				.getPreferenceStore();
		String pspm = store
				.getString(IDEInternalPreferences.PROJECT_SWITCH_PERSP_MODE);
		if (!IDEInternalPreferences.PSPM_PROMPT.equals(pspm)) {
			
			return IDEInternalPreferences.PSPM_ALWAYS.equals(pspm);
		}
		String desc = finalPersp.getDescription();
		String message;
		if (desc == null || desc.length() == 0)
			message = NLS.bind(ResourceMessages.NewProject_perspSwitchMessage,
					finalPersp.getLabel());