Bug 40074 [navigation] Selection reset to previous item when arrowing in outline
build I20030710 - open a Java editor on a class with several methods - in the outline, select the first method - use the arrow key to go down one item - as soon as the delay passes and the new text range is selected, use the arrow key to go down another item - after the delay, the selection is reset back to the previous item
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/javaeditor/JavaEditor.java
return fEncodingSupport;
		if (required == IShowInTargetList.class) {
			return new IShowInTargetList() {
				public String[] getShowInTargetIds() {
					return new String[] { JavaUI.ID_PACKAGES, IPageLayout.ID_OUTLINE, IPageLayout.ID_RES_NAV };
				}
			};
		}
			
		return super.getAdapter(required);
	}
	
	protected void setSelection(ISourceReference reference, boolean moveCursor) {
		
		ISelection selection= getSelectionProvider().getSelection();
		if (selection instanceof TextSelection) {
			TextSelection textSelection= (TextSelection) selection;
			if (textSelection.getOffset() != 0 || textSelection.getLength() != 0)
				markInNavigationHistory();
		}
		
		if (reference != null) {
			
			StyledText  textWidget= null;
			
			ISourceViewer sourceViewer= getSourceViewer();
			if (sourceViewer != null)
				textWidget= sourceViewer.getTextWidget();
			
			if (textWidget == null)