ac.soton.multisim.ui.actions.DeleteDiagramAction.java Source code

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Here is the source code for ac.soton.multisim.ui.actions.DeleteDiagramAction.java

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/**
 * Copyright (c) 2014 University of Southampton.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 */
package ac.soton.multisim.ui.actions;

import org.eclipse.core.resources.IFile;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IAdaptable;
import org.eclipse.core.runtime.NullProgressMonitor;
import org.eclipse.emf.ecore.resource.Resource;
import org.eclipse.emf.workspace.util.WorkspaceSynchronizer;
import org.eclipse.gmf.runtime.notation.View;
import org.eclipse.jface.action.Action;
import org.eclipse.jface.dialogs.MessageDialog;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.ui.IEditorPart;
import org.eclipse.ui.IEditorReference;
import org.eclipse.ui.ISharedImages;
import org.eclipse.ui.IWorkbenchPage;
import org.eclipse.ui.PartInitException;
import org.eclipse.ui.PlatformUI;
import org.eclipse.ui.navigator.ICommonActionExtensionSite;

/**
 * Action for deleting a component diagram.
 * 
 * @author vitaly
 *
 */
public class DeleteDiagramAction extends Action {

    private ICommonActionExtensionSite site;

    public DeleteDiagramAction(ICommonActionExtensionSite actionSite) {
        site = actionSite;
        setText("&Delete");
        setToolTipText("Delete component diagram");
        setImageDescriptor(
                PlatformUI.getWorkbench().getSharedImages().getImageDescriptor(ISharedImages.IMG_ETOOL_DELETE));
    }

    @Override
    public void run() {
        if (!(site.getStructuredViewer().getSelection().isEmpty())) {
            IStructuredSelection ssel = (IStructuredSelection) site.getStructuredViewer().getSelection();

            Object element = ssel.getFirstElement();
            if (element instanceof IAdaptable) {
                View view = (View) ((IAdaptable) element).getAdapter(View.class);
                Resource resource = view.eResource();

                if (resource != null && resource.isLoaded()) {
                    IFile file = WorkspaceSynchronizer.getFile(resource);
                    MessageDialog dialog = new MessageDialog(site.getViewSite().getShell(),
                            "Confirm Diagram Delete", null,
                            "Are you sure you want to delete the diagram file '" + file.getName()
                                    + "' from the project '" + file.getParent().getName() + "' ?",
                            MessageDialog.QUESTION, new String[] { "Yes", "No" }, 0);

                    if (dialog.open() == 0) {
                        Resource domResource = view.getElement().eResource();
                        try {
                            closeOpenedEditor(file);
                            file.delete(false, false, new NullProgressMonitor());
                            WorkspaceSynchronizer.getFile(domResource).delete(false, false,
                                    new NullProgressMonitor());
                        } catch (PartInitException e) {
                            e.printStackTrace();
                        } catch (CoreException e) {
                            e.printStackTrace();
                        }
                    }
                }
            }
        }
    }

    /**
     * Closes an open editor for a file.
     * 
     * @param file
     * @throws PartInitException
     */
    static void closeOpenedEditor(IFile file) throws PartInitException {
        IWorkbenchPage page = PlatformUI.getWorkbench().getActiveWorkbenchWindow().getActivePage();
        IEditorReference[] editorReferences = page.getEditorReferences();
        for (int j = 0; j < editorReferences.length; j++) {
            IFile inputFile = (IFile) editorReferences[j].getEditorInput().getAdapter(IFile.class);

            if (file.equals(inputFile)) {
                IEditorPart editor = editorReferences[j].getEditor(true);
                page.closeEditor(editor, false);
            }
        }
    }
}