code: /*--------------------------------------------------------------*
    Copyright (C) 2006-2020 OpenSim Ltd.
  
    This file is distributed WITHOUT ANY WARRANTY. See the file
    'License' for details on this and other legal matters.
  *--------------------------------------------------------------*/
  
  package org.omnetpp.scave.actions.analysismodel;
  
  import org.eclipse.core.runtime.CoreException;
  import org.eclipse.jface.viewers.ISelection;
  import org.eclipse.ui.ISharedImages;
  import org.omnetpp.scave.ScavePlugin;
  import org.omnetpp.scave.actions.AbstractScaveAction;
  import org.omnetpp.scave.editors.ScaveEditor;
  import org.omnetpp.scave.model.commands.CommandStack;
  import org.omnetpp.scave.model.commands.ICommand;
  
  /**
   * Perform Redo action on the ScaveEditor.
   */
  public class RedoAction extends AbstractScaveAction {
      public RedoAction() {
          setText("Redo Scave Operation");
          setImageDescriptor(ScavePlugin.getSharedImageDescriptor(ISharedImages.IMG_TOOL_REDO));
      }
  
      @Override
      protected void doRun(ScaveEditor editor, ISelection selection) throws CoreException {
          editor.getActiveCommandStack().redo();
      }
  
      @Override
      public void update() {
          super.update();
  
          CommandStack activeCommandStack = ScaveEditor.getActiveScaveCommandStack();
          ICommand commandToRedo = activeCommandStack == null ? null : activeCommandStack.getCommandToRedo();
          String label = commandToRedo == null ? "Can't Redo" : ("Redo " + commandToRedo.getLabel());
  
          setText(label);
          setDescription(label);
          setToolTipText(label);
      }
  
      @Override
      protected boolean isApplicable(ScaveEditor editor, ISelection selection) {
          CommandStack activeCommandStack = editor.getActiveCommandStack();
          return activeCommandStack != null && activeCommandStack.canRedo();
      }
  }
  