Bug 19445 Text editor should not display tooltip and help infopop simultaneously
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/javaeditor/ClassFileEditor.java
* Creates a source attachment form for a class file. 
			 */
			public SourceAttachmentForm(IClassFile file) {
				fFile= file;
			}
		
			/**
			 * Returns the package fragment root of this file.
			 */
			private IPackageFragmentRoot getPackageFragmentRoot(IClassFile file) {
		
				IJavaElement element= file.getParent();
				while (element != null && element.getElementType() != IJavaElement.PACKAGE_FRAGMENT_ROOT)
					element= element.getParent();
		
				return (IPackageFragmentRoot) element;		
			}
			
			/**
			 * Creates the control of the source attachment form.
			 */
			public Control createControl(Composite parent) {
		
				Display display= parent.getDisplay();
				fBackgroundColor= display.getSystemColor(SWT.COLOR_LIST_BACKGROUND);
				fForegroundColor= display.getSystemColor(SWT.COLOR_LIST_FOREGROUND);
				fSeparatorColor= new Color(display, 152, 170, 203);
		
				JFaceResources.getFontRegistry().addListener(this);