Bug 80473 [rulers][preferences] allow disabling of range indicator on left of java editor
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/javaeditor/JavaEditor.java
if (kind == IJavaElement.TYPE || kind == IJavaElement.METHOD || kind == IJavaElement.INITIALIZER) {
									final ISourceReference reference= (ISourceReference)element;
									final ISourceRange range= reference.getSourceRange();
									if (range != null) {
										viewer.setSelectedRange(range.getOffset(), range.getLength());
										viewer.doOperation(ISourceViewer.FORMAT);
									}
								}
							}
						} catch (JavaModelException exception) {
							
						}
					} else {
						viewer.setSelectedRange(selection.x, 1);
						viewer.doOperation(ISourceViewer.FORMAT);
					}
				} catch (BadLocationException exception) {
					
				} finally {
					viewer.setRedraw(true);
					viewer.restoreSelection();
				}
			}
		}
	}
	/**
	 * Internal activation listener.
	 * @since 3.0
	 */
	private class ActivationListener implements IWindowListener {