Bug 77537 [preferences] Preview window in Preferences->Java->Properties File Editor displays incorrect background color
The properties file editor seems to inherit its background color from the setting in Preferences->Java->Editor->Syntax. However, the preview window in Preferences->Java->Properties File Editor always displays a white background.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/preferences/PropertiesFileEditorPreferencePage.java
fPreviewViewer.configure(configuration);
		Font font= JFaceResources.getFont(PreferenceConstants.EDITOR_TEXT_FONT);
		fPreviewViewer.getTextWidget().setFont(font);
		new SourcePreviewerUpdater(fPreviewViewer, configuration, store);
		fPreviewViewer.setEditable(false);
		
		String content= loadPreviewContentFromFile("PropertiesFileEditorColorSettingPreviewCode.txt"); 
		IDocument document= new Document(content);
		PropertiesFileDocumentSetupParticipant.setupDocument(document);
		fPreviewViewer.setDocument(document);
		return fPreviewViewer.getControl();
	}
	
	private static void indent(Control control) {
		GridData gridData= new GridData();
		gridData.horizontalIndent= 20;
		control.setLayoutData(gridData);		
	}
	
	private void createDependency(final Button master, String masterKey, final Control slave) {
		indent(slave);
		boolean masterState= fOverlayStore.getBoolean(masterKey);
		slave.setEnabled(masterState);
		SelectionListener listener= new SelectionListener() {
			public void widgetSelected(SelectionEvent e) {
				slave.setEnabled(master.getSelection());
			}
			public void widgetDefaultSelected(SelectionEvent e) {}
		};
		master.addSelectionListener(listener);