de.ovgu.featureide.fm.ui.editors.featuremodel.actions.CreateCompoundAction.java Source code

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Here is the source code for de.ovgu.featureide.fm.ui.editors.featuremodel.actions.CreateCompoundAction.java

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/* FeatureIDE - An IDE to support feature-oriented software development
 * Copyright (C) 2005-2012  FeatureIDE team, University of Magdeburg
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program. If not, see http://www.gnu.org/licenses/.
 *
 * See http://www.fosd.de/featureide/ for further information.
 */
package de.ovgu.featureide.fm.ui.editors.featuremodel.actions;

import java.util.Iterator;
import java.util.LinkedList;

import org.eclipse.core.commands.ExecutionException;
import org.eclipse.core.commands.operations.IUndoContext;
import org.eclipse.gef.ui.parts.GraphicalViewerImpl;
import org.eclipse.jface.action.Action;
import org.eclipse.jface.resource.ImageDescriptor;
import org.eclipse.jface.viewers.ISelectionChangedListener;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.jface.viewers.SelectionChangedEvent;
import org.eclipse.jface.viewers.TreeViewer;
import org.eclipse.ui.ISharedImages;
import org.eclipse.ui.PlatformUI;

import de.ovgu.featureide.fm.core.Feature;
import de.ovgu.featureide.fm.core.FeatureModel;
import de.ovgu.featureide.fm.ui.FMUIPlugin;
import de.ovgu.featureide.fm.ui.editors.featuremodel.editparts.FeatureEditPart;
import de.ovgu.featureide.fm.ui.editors.featuremodel.editparts.ModelEditPart;
import de.ovgu.featureide.fm.ui.editors.featuremodel.operations.FeatureCreateCompoundOperation;

/**
 * Creates a new feature with the currently selected features as children.
 * 
 * @author Thomas Thuem
 */
public class CreateCompoundAction extends Action {

    public static final String ID = "de.ovgu.featureide.createcompound";

    private final FeatureModel featureModel;

    private Object viewer;

    private Feature parent = null;

    private LinkedList<Feature> selectedFeatures = new LinkedList<Feature>();

    private Object diagramEditor;

    private static ImageDescriptor createImage = PlatformUI.getWorkbench().getSharedImages()
            .getImageDescriptor(ISharedImages.IMG_OBJ_ADD);

    private ISelectionChangedListener listener = new ISelectionChangedListener() {
        public void selectionChanged(SelectionChangedEvent event) {
            IStructuredSelection selection = (IStructuredSelection) event.getSelection();
            setEnabled(isValidSelection(selection));
        }
    };

    public CreateCompoundAction(Object viewer, FeatureModel featureModel, Object diagramEditor) {
        super("Create Feature Above", createImage);
        this.viewer = viewer;
        this.featureModel = featureModel;
        this.diagramEditor = diagramEditor;

        setEnabled(false);
        if (viewer instanceof GraphicalViewerImpl) {
            ((GraphicalViewerImpl) viewer).addSelectionChangedListener(listener);
        } else {
            ((TreeViewer) viewer).addSelectionChangedListener(listener);
        }
    }

    @Override
    public void run() {
        FeatureCreateCompoundOperation op = new FeatureCreateCompoundOperation(viewer, parent, featureModel,
                selectedFeatures, diagramEditor);
        op.addContext((IUndoContext) featureModel.getUndoContext());

        try {
            PlatformUI.getWorkbench().getOperationSupport().getOperationHistory().execute(op, null, null);
        } catch (ExecutionException e) {
            FMUIPlugin.getDefault().logError(e);

        }
    }

    private boolean isValidSelection(IStructuredSelection selection) {
        // check empty selection (i.e. ModelEditPart is selected)
        if (selection.size() == 1 && (selection.getFirstElement() instanceof ModelEditPart))
            return false;

        // check that selected features have the same parent
        selectedFeatures.clear();
        Iterator<?> iter = selection.iterator();
        while (iter.hasNext()) {
            Object editPart = iter.next();
            if (!(editPart instanceof FeatureEditPart) && !(editPart instanceof Feature))
                continue;
            Feature feature;

            if (editPart instanceof FeatureEditPart)
                feature = ((FeatureEditPart) editPart).getFeature();
            else
                feature = (Feature) editPart;

            if (selectedFeatures.isEmpty())
                parent = feature.getParent();
            else if (parent != feature.getParent())
                return false;
            selectedFeatures.add(feature);
        }
        return !selectedFeatures.isEmpty();
    }

}