plugins/org.eclipse.amalgam.explorer.activity/src/org/eclipse/amalgam/explorer/activity/internal/viewer/actions/runnable/OpenRepresentationsRunnable.java

/*******************************************************************************
 * Copyright (c)  2006, 2015 THALES GLOBAL SERVICES.
 * 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:
 *    Thales - initial API and implementation
 *******************************************************************************/
package org.eclipse.amalgam.explorer.activity.internal.viewer.actions.runnable;

import java.lang.reflect.InvocationTargetException;
import java.util.ArrayList;
import java.util.List;

import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.core.runtime.SubMonitor;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.gef.EditPart;
import org.eclipse.gmf.runtime.diagram.ui.editparts.DiagramEditPart;
import org.eclipse.gmf.runtime.diagram.ui.parts.DiagramEditor;
import org.eclipse.gmf.runtime.diagram.ui.requests.ArrangeRequest;
import org.eclipse.gmf.runtime.diagram.ui.requests.RequestConstants;
import org.eclipse.jface.operation.IRunnableWithProgress;
import org.eclipse.sirius.business.api.session.Session;
import org.eclipse.sirius.business.api.session.SessionManager;
import org.eclipse.sirius.ui.business.api.dialect.DialectUIManager;
import org.eclipse.sirius.viewpoint.DRepresentation;
import org.eclipse.sirius.viewpoint.DSemanticDecorator;
import org.eclipse.swt.widgets.Display;
import org.eclipse.ui.IEditorPart;

public class OpenRepresentationsRunnable implements IRunnableWithProgress {
	// Make root diagram as the welcome page.

	// The list of representations to open.
	private List<DRepresentation> _representations;
	// The arrange all flag.
	private boolean _arrangeAll;

	/**
	 * Constructs the runnable allowing to open DOREMI representations.
	 * 
	 * @param representations_p
	 *            The list of representations to open.
	 * @param arrangeAll_p
	 *            <code>True</code> If we need to arrange all diagram elements
	 *            immediately after opening representations else
	 *            <code>false</code>.
	 */
	public OpenRepresentationsRunnable(List<DRepresentation> representations_p, boolean arrangeAll_p) {
		_representations = representations_p;
		_arrangeAll = arrangeAll_p;
	}

	@SuppressWarnings("unchecked")
	public void run(IProgressMonitor monitor_p) throws InvocationTargetException, InterruptedException {
		SubMonitor progress = SubMonitor.convert(monitor_p, 1);
		SubMonitor loopProgress = progress.newChild(1).setWorkRemaining(_representations.size());
		for (DRepresentation representation : _representations) {
			if (representation instanceof DSemanticDecorator) {

				// Gets the corresponding session.
				EObject semantic = ((DSemanticDecorator) representation).getTarget();
				Session session = SessionManager.INSTANCE.getSession(semantic);

				// Opens the editor.
				if (null != session) {
					IEditorPart part = DialectUIManager.INSTANCE.openEditor(session, representation, monitor_p);
					if (null != part) {
						// Arrange all.
						if (_arrangeAll && (part instanceof DiagramEditor)) {
							DiagramEditor editor = (DiagramEditor) part;
							final DiagramEditPart diagramEditPart = editor.getDiagramEditPart();
							ArrayList<EditPart> editParts = new ArrayList<EditPart>();
							editParts.addAll(diagramEditPart.getChildren());

							ArrangeRequest arrangeRequest = new ArrangeRequest(RequestConstants.REQ_ARRANGE_DEFERRED);
							arrangeRequest.setViewAdaptersToArrange(editParts);
							diagramEditPart.deactivate();
							diagramEditPart.performRequest(arrangeRequest);
							Display.getDefault().syncExec(new Runnable() {
								public void run() {
									diagramEditPart.activate();
								}
							});
						}
					}
				}
			}
			loopProgress.worked(1);
		}
	}
}