ResourceContributionItem.java

package org.rascalmpl.eclipse.actions;

import java.net.URI;
import java.net.URISyntaxException;

import org.eclipse.core.resources.IResource;
import org.eclipse.jface.action.Action;
import org.eclipse.jface.action.ActionContributionItem;
import org.eclipse.jface.action.ContributionItem;
import org.eclipse.jface.resource.ImageDescriptor;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.swt.widgets.Menu;
import org.eclipse.ui.IWorkbenchWindow;
import org.eclipse.ui.PlatformUI;
import org.rascalmpl.eclipse.Activator;
import org.rascalmpl.eclipse.library.util.Clipboard;
import org.rascalmpl.uri.URIUtil;
import io.usethesource.vallang.IValueFactory;
import org.rascalmpl.values.ValueFactoryFactory;

public class ResourceContributionItem extends ContributionItem {

    public ResourceContributionItem() {
    }

    public ResourceContributionItem(String id) {
        super(id);
    }

    @Override
    public void fill(Menu menu, int index) {
        new ActionContributionItem(new CopySourceLocAction()).fill(menu, index);
    }

    private static class CopySourceLocAction extends Action {
        final IValueFactory vf = ValueFactoryFactory.getValueFactory();
        final Clipboard cb = new Clipboard(vf);

        public CopySourceLocAction() {
            super("Copy source location");
        }

        @Override
        public ImageDescriptor getImageDescriptor() {
            return Activator.getRascalImage();
        }

        @Override
        public void run() {
            try {
                final IResource val = getSelectedValue();

                if (val != null) {
                    URI uri = URIUtil.create("project", val.getProject().getName(), "/" + val.getProjectRelativePath().toPortableString());
                    cb.copy(vf.sourceLocation(uri));
                }
            } catch (URISyntaxException e) {
                // s
            }
        }

        private IResource getSelectedValue() {
            IWorkbenchWindow window = PlatformUI.getWorkbench().getActiveWorkbenchWindow();

            if (window != null) {
                ISelection sel = window.getSelectionService().getSelection();

                if (sel instanceof IStructuredSelection) {
                    IStructuredSelection selection = (IStructuredSelection) sel;
                    Object firstElement = selection.getFirstElement();

                    if (firstElement instanceof IResource) {
                        return ((IResource) firstElement);
                    }
                }
            }

            return null;
        }
    }
}