private Control createPreviewer(Composite parent) {
IPreferenceStore generalTextStore = EditorsUI.getPreferenceStore();
IPreferenceStore store =
new ChainedPreferenceStore(new IPreferenceStore[] {getPreferenceStore(), generalTextStore});
fPreviewViewer =
new CSourceViewer(
parent, null, null, false, SWT.V_SCROLL | SWT.H_SCROLL | SWT.BORDER, store);
SimpleCSourceViewerConfiguration configuration =
new SimpleCSourceViewerConfiguration(
fColorManager, store, null, ICPartitions.C_PARTITIONING, false);
fPreviewViewer.configure(configuration);
Font font = JFaceResources.getFont(PreferenceConstants.EDITOR_TEXT_FONT);
fPreviewViewer.getTextWidget().setFont(font);
CSourcePreviewerUpdater.registerPreviewer(fPreviewViewer, configuration, store);
fPreviewViewer.setEditable(false);
String content = loadPreviewContentFromFile("ColorSettingPreviewCode.txt"); // $NON-NLS-1$
IDocument document = new Document(content);
CUIPlugin.getDefault()
.getTextTools()
.setupCDocumentPartitioner(document, ICPartitions.C_PARTITIONING, null);
fPreviewViewer.setDocument(document);
installSemanticHighlighting();
return fPreviewViewer.getControl();
}