Bug 19104 Basket for problems with .java files outside build path
1) .java file is not inside a source folder - "Rename" refactoring is enabled but does not work: no preview and does not rename if finished is pressed. 2) .java file that is inside a non-Java project - Lots of problems when views hold on to a working copy which can not be mapped to a compilation unit after the editor has been closed - shows red squiggly lines when using "Show Source of selected element only" - same problems as 1) MORE WILL FOLLOW TOMORROW
org.eclipse.jdt.ui/ui/org/eclipse/jdt/ui/actions/ModifyParametersAction.java
private ModifyParametersRefactoring fRefactoring;
	private CompilationUnitEditor fEditor;
	
	public ModifyParametersAction(CompilationUnitEditor editor) {
		this(editor.getEditorSite());
		fEditor= editor;
		setEnabled(SelectionConverter.canOperateOn(fEditor));
	}
	public ModifyParametersAction(IWorkbenchSite site) {