EmbeddedEditorFactory factory = new EmbeddedEditorFactory();
			
		xtextInjector.injectMembers(factory);
		xTextEmbeddedEditor = factory.newEditor(new IEditedResourceProvider() {

			@Override
			public XtextResource createResource() {
				return xtextResource;
			}
		}).showErrorAndWarningAnnotations().withParent(xtextEditorComposite); 

		
		xtextPartialEditor = xTextEmbeddedEditor.createPartialEditor(prefix,
				editablePart, suffix, true);
		
		xtextEditorComposite.update();

public EmbeddedEditor withParent(final Composite parent) {
			if (editorBuild)
				throw new IllegalStateException();
			editorBuild = true;
//			/*fProjectionSupport =*/installProjectionSupport(this.fSourceViewer);
			final CompositeRuler annotationRuler;
			if (annotationTypes != null && annotationTypes.length != 0) {
				annotationRuler = new CompositeRuler();
			} else {
				annotationRuler = null;
			}
			final XtextSourceViewer viewer = this.sourceViewerFactory.createSourceViewer(
					parent, 
					annotationRuler, 
					null, // overviewRuler
					false, // showAnnotationOverview 
					SWT.BORDER | SWT.V_SCROLL | SWT.H_SCROLL);
			final XtextSourceViewerConfiguration viewerConfiguration = this.sourceViewerConfigurationProvider.get();
			viewer.configure(viewerConfiguration);
...