core/org.polarsys.esf.core.common.ui/src/main/java/org/polarsys/esf/core/common/ui/editor/EmptyActionBarContributor.java

/*******************************************************************************
 * Copyright (c) 2016 ALL4TEC & CEA LIST.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License 2.0
 * which accompanies this distribution, and is available at
 * https://www.eclipse.org/legal/epl-2.0/
 *
 * SPDX-License-Identifier: EPL-2.0
 * 
 * Contributors:
 *     ALL4TEC & CEA LIST - initial API and implementation
 ******************************************************************************/
package org.polarsys.esf.core.common.ui.editor;

import java.util.Collection;

import org.eclipse.emf.common.command.Command;
import org.eclipse.emf.common.command.UnexecutableCommand;
import org.eclipse.emf.edit.ui.action.DeleteAction;
import org.eclipse.jface.action.IMenuManager;
import org.eclipse.jface.action.Separator;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.ui.actions.ActionFactory;
import org.polarsys.esf.core.common.ui.actions.ActionBarContributorUtils;

/**
 * This is the empty action bar contributor.
 * It doesn't allow to add or delete elements from the input model.
 * 
 * It's primary used is for the propagation tree editor, and overridden
 * for the archived file editors.
 * 
 * @author $Author: jdumont $
 * @version $Revision: 83 $
 */
public class EmptyActionBarContributor
    extends AbstractActionBarContributor {

    /**
     * Default constructor.
     */
    public EmptyActionBarContributor() {
        // Call the parent constructor
        super();
    }

    /**
     * {@inheritDoc}
     * 
     * Overridden to avoid the creation of new elements in the model.
     * This implementation disable the creation of action in the context menu
     * and in the editor tool bar.
     */
    @Override
    protected void addCreateSelectChildActions(final ISelection pSelection) {
        // Do nothing voluntary
    }

    /**
     * {@inheritDoc}
     * 
     * Overridden to ensure there is no delete action possible.
     */
    @Override
    protected DeleteAction createDeleteAction() {

        DeleteAction vAction = new DeleteAction(removeAllReferencesOnDelete()) {

            /**
             * {@inheritDoc}
             */
            @Override
            public Command createCommand(final Collection<?> pSelection) {
                return UnexecutableCommand.INSTANCE;
            }
        };

        vAction.setId(ActionFactory.DELETE.getId());

        return vAction;
    }

    /**
     * {@inheritDoc}
     * 
     * Overridden to hide all the edit actions like undo, redo, cut, copy, paste, etc.
     */
    @Override
    public void menuAboutToShow(final IMenuManager pMenuManager) {
        // Add the standard addition marker at the beginning if needed
        if ((style & ADDITIONS_LAST_STYLE) == 0) {
            pMenuManager.add(new Separator(ActionBarContributorUtils.ADDITIONS_SEPARATOR_ID));
        }

        // Add the standard edit marker but not all the related actions
        pMenuManager.add(new Separator(ActionBarContributorUtils.EDIT_SEPARATOR_ID));

        // Add the standard addition marker at the end if needed
        if ((style & ADDITIONS_LAST_STYLE) != 0) {
            pMenuManager.add(new Separator(ActionBarContributorUtils.ADDITIONS_SEPARATOR_ID));
        }

        // Add the standard additions-end marker
        pMenuManager.add(new Separator(ActionBarContributorUtils.ADDITIONS_END_SEPARATOR_ID));

        // Finally add all the global actions
        addGlobalActions(pMenuManager);
    }
}