Bug 35236 Attaching source redraws editor many times, causing much flashing
build I20030316 Kevin called in to report the following: - with an installed JRE that does not have source attached, - open a type in the rt.jar (e.g. java.awt.Color) - attach source - the editor flashes many times before it displays the source, then continues to flash for several more seconds I was able to reproduce it on Win XP.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/javaeditor/ClassFileEditor.java
private final IClassFile fFile;
			private ScrolledComposite fScrolledComposite;
			private Color fBackgroundColor;
			private Color fForegroundColor;
			private Color fSeparatorColor;
			private List fBannerLabels= new ArrayList();
			private List fHeaderLabels= new ArrayList();
			private Font fFont;
			
			/**
			 * 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;