Bug 47838 Make refactoring menu selection sensitive in editor [refactoring]
M5 Currently all refactoring actions are enabled in the editor's context menu. Make them selection dependent. Check if code resolve might be enough (no need to create an AST).
org.eclipse.jdt.ui/ui/org/eclipse/jdt/ui/actions/SelectionDispatchAction.java
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package org.eclipse.jdt.ui.actions;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.jface.action.Action;
import org.eclipse.jface.text.ITextSelection;