Bug 41443 overview ruler not working
smoke test for 20030812 The overview ruler in the Java editor does not work when starting with a fresh workspace as described in the smoke test scenario.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/javaeditor/JavaEditor.java
int style= cutDown ? SWT.NONE : (SWT.V_SCROLL | SWT.H_SCROLL);
				return new DefaultInformationControl(shell, SWT.RESIZE, style, new HTMLTextPresenter(cutDown));
			}
		};
		fInformationPresenter= new InformationPresenter(informationControlCreator);
		fInformationPresenter.setSizeConstraints(60, 10, true, true);		
		fInformationPresenter.install(getSourceViewer());
		
		if (PreferenceConstants.getPreferenceStore().getBoolean(PreferenceConstants.EDITOR_SYNC_OUTLINE_ON_CURSOR_MOVE)) {
			fEditorSelectionChangedListener= new EditorSelectionChangedListener();
			fEditorSelectionChangedListener.install(getSelectionProvider());
		}
		
		if (isBrowserLikeLinks())
			enableBrowserLikeLinks();
		if (PreferenceConstants.getPreferenceStore().getBoolean(PreferenceConstants.EDITOR_DISABLE_OVERWRITE_MODE))
			configureInsertMode(OVERWRITE, false);
		
		if (isQuickDiffAlwaysOn())
			showChangeInformation(true);
	}
	
	protected void showOverviewRuler() {
		if (fOverviewRuler != null) {
			if (getSourceViewer() instanceof ISourceViewerExtension) {
				((ISourceViewerExtension) getSourceViewer()).showAnnotationsOverview(true);
				fSourceViewerDecorationSupport.updateOverviewDecorations();
			}
		}
	}