org.eclipse.emf.ecp.view.model.internal.preview.actions.OpenPreviewHandler.java Source code

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Here is the source code for org.eclipse.emf.ecp.view.model.internal.preview.actions.OpenPreviewHandler.java

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/*******************************************************************************
 * Copyright (c) 2011-2014 EclipseSource Muenchen GmbH and others.
 *
 * 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
 *
 * Contributors:
 * Alexandra Buzila- initial API and implementation
 ******************************************************************************/
package org.eclipse.emf.ecp.view.model.internal.preview.actions;

import org.eclipse.core.commands.ExecutionEvent;
import org.eclipse.core.commands.ExecutionException;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Status;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.emf.ecore.resource.Resource;
import org.eclipse.emf.ecore.resource.ResourceSet;
import org.eclipse.emf.ecp.view.model.internal.preview.Activator;
import org.eclipse.emf.ecp.view.spi.model.VView;
import org.eclipse.emf.ecp.view.spi.model.reporting.StatusReport;
import org.eclipse.emf.ecp.view.spi.treemasterdetail.ui.swt.MasterDetailAction;
import org.eclipse.emfforms.spi.editor.IToolbarAction;
import org.eclipse.jface.action.Action;
import org.eclipse.jface.resource.ImageDescriptor;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.ui.IWorkbenchPage;
import org.eclipse.ui.PartInitException;
import org.eclipse.ui.PlatformUI;
import org.eclipse.ui.handlers.HandlerUtil;
import org.osgi.framework.FrameworkUtil;

/** Opens the {@link org.eclipse.emf.ecp.view.model.internal.preview.e3.views.PreviewView}. */
public class OpenPreviewHandler extends MasterDetailAction implements IToolbarAction {
    /**
     * {@inheritDoc}
     *
     * @see org.eclipse.core.commands.IHandler#execute(org.eclipse.core.commands.ExecutionEvent)
     */
    @Override
    public Object execute(ExecutionEvent event) throws ExecutionException {
        final Object selection = ((IStructuredSelection) HandlerUtil.getActiveMenuSelection(event))
                .getFirstElement();
        if (selection == null || !(selection instanceof EObject)) {
            return null;
        }
        execute((EObject) selection);
        return null;
    }

    /**
     * {@inheritDoc}
     *
     * @see org.eclipse.emf.ecp.view.spi.treemasterdetail.ui.swt.MasterDetailAction#execute(EObject)
     */
    @Override
    public void execute(EObject object) {
        final IWorkbenchPage page = PlatformUI.getWorkbench().getActiveWorkbenchWindow().getActivePage();

        try {
            page.showView("org.eclipse.emf.ecp.view.model.preview.e3.views.PreviewView", null, //$NON-NLS-1$
                    IWorkbenchPage.VIEW_VISIBLE);
        } catch (final PartInitException ex) {
            Activator.getDefault().getReportService()
                    .report(new StatusReport(new Status(IStatus.ERROR, Activator.PLUGIN_ID, ex.getMessage(), ex)));
        }

    }

    /**
     * {@inheritDoc}
     *
     * @see org.eclipse.emf.ecp.view.spi.treemasterdetail.ui.swt.MasterDetailAction#shouldShow(org.eclipse.emf.ecore.EObject)
     */
    @Override
    public boolean shouldShow(EObject eObject) {
        return true;
    }

    @Override
    public Action getAction(final Object currentObject) {
        final Action previewAction = new Action("Open Preview") {
            @Override
            public void run() {
                execute(((ResourceSet) currentObject).getResources().get(0).getAllContents().next());
            }
        };
        previewAction.setImageDescriptor(ImageDescriptor
                .createFromURL(FrameworkUtil.getBundle(this.getClass()).getResource("icons/preview.png")));
        return previewAction;
    }

    @Override
    public boolean canExecute(Object object) {
        // We can't execute our Action on Objects other than ResourceSet
        if (!(object instanceof ResourceSet)) {
            return false;
        }
        // Check, if the ResourceSet contains a VView. If so, we can execute our action.
        final ResourceSet resourceSet = (ResourceSet) object;
        for (final Resource r : resourceSet.getResources()) {
            if (r.getContents().size() > 0 && r.getContents().get(0) instanceof VView) {
                return true;
            }
        }
        return false;
    }
}