| /******************************************************************************* |
| * Copyright (c) 2016 Obeo. |
| * 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: |
| * Obeo - initial API and implementation and/or initial documentation |
| * ... |
| *******************************************************************************/ |
| package org.eclipse.intent.mapping.ide.ui.view; |
| |
| import java.util.HashMap; |
| import java.util.Map; |
| |
| import org.eclipse.intent.mapping.base.IBase; |
| import org.eclipse.intent.mapping.base.IBaseRegistry; |
| import org.eclipse.intent.mapping.base.IBaseRegistryListener; |
| import org.eclipse.intent.mapping.ide.IdeMappingUtils; |
| import org.eclipse.jface.viewers.IStructuredContentProvider; |
| import org.eclipse.jface.viewers.Viewer; |
| import org.eclipse.swt.widgets.Display; |
| |
| /** |
| * {@link IBaseRegistry} content provider. |
| * |
| * @author <a href="mailto:yvan.lussaud@obeo.fr">Yvan Lussaud</a> |
| */ |
| public class MappingBaseRegistryContentProvider implements IStructuredContentProvider { |
| |
| /** |
| * Workaround for null in JFace combo box... |
| */ |
| public static final Object NO_VALUE = new Object(); |
| |
| // Force the start of org.eclipse.intent.mapping.ide |
| // TODO we should find a better way to do that |
| { |
| IdeMappingUtils.getFileConectorDelegateRegistry(); |
| } |
| |
| /** |
| * An {@link IBaseRegistryListener} that update a {@link Viewer}. |
| * |
| * @author <a href="mailto:yvan.lussaud@obeo.fr">Yvan Lussaud</a> |
| */ |
| private final class RegisteryListener implements IBaseRegistryListener { |
| |
| /** |
| * The {@link Viewer} to update. |
| */ |
| private final Viewer viewer; |
| |
| /** |
| * Constructor. |
| * |
| * @param viewer |
| * the {@link Viewer} to update |
| */ |
| RegisteryListener(Viewer viewer) { |
| this.viewer = viewer; |
| } |
| |
| /** |
| * {@inheritDoc} |
| * |
| * @see org.eclipse.intent.mapping.base.IBaseRegistryListener#baseRegistred(org.eclipse.intent.mapping.base.IBase) |
| */ |
| public void baseRegistred(IBase base) { |
| refresh(); |
| } |
| |
| /** |
| * {@inheritDoc} |
| * |
| * @see org.eclipse.intent.mapping.base.IBaseRegistryListener#baseUnregistred(org.eclipse.intent.mapping.base.IBase) |
| */ |
| public void baseUnregistred(IBase base) { |
| refresh(); |
| } |
| |
| /** |
| * Refresh the {@link Viewer}. |
| */ |
| private void refresh() { |
| if (!viewer.getControl().isDisposed()) { |
| if (Display.getDefault().getThread() == Thread.currentThread()) { |
| viewer.refresh(); |
| } else { |
| Display.getDefault().asyncExec(new Runnable() { |
| |
| public void run() { |
| viewer.refresh(); |
| } |
| }); |
| } |
| } |
| } |
| |
| } |
| |
| /** |
| * {@link Viewer} to {@link RegisteryListener} mapping. |
| */ |
| private final Map<Viewer, RegisteryListener> listeners = new HashMap<Viewer, RegisteryListener>(); |
| |
| /** |
| * {@inheritDoc} |
| * |
| * @see org.eclipse.jface.viewers.IContentProvider#dispose() |
| */ |
| public void dispose() { |
| assert listeners.isEmpty(); |
| } |
| |
| /** |
| * {@inheritDoc} |
| * |
| * @see org.eclipse.jface.viewers.IContentProvider#inputChanged(org.eclipse.jface.viewers.Viewer, |
| * java.lang.Object, java.lang.Object) |
| */ |
| public void inputChanged(Viewer viewer, Object oldInput, Object newInput) { |
| if (oldInput instanceof IBaseRegistry) { |
| ((IBaseRegistry)oldInput).removeListener(listeners.remove(viewer)); |
| } |
| if (newInput instanceof IBaseRegistry) { |
| final RegisteryListener listener = new RegisteryListener(viewer); |
| listeners.put(viewer, listener); |
| ((IBaseRegistry)newInput).addListener(listener); |
| } |
| } |
| |
| /** |
| * {@inheritDoc} |
| * |
| * @see org.eclipse.jface.viewers.IStructuredContentProvider#getElements(java.lang.Object) |
| */ |
| public Object[] getElements(Object inputElement) { |
| final Object[] res; |
| |
| if (inputElement instanceof IBaseRegistry) { |
| res = new Object[((IBaseRegistry)inputElement).getBases().size() + 1]; |
| int index = 0; |
| res[index++] = NO_VALUE; |
| for (IBase base : ((IBaseRegistry)inputElement).getBases()) { |
| res[index++] = base; |
| } |
| } else { |
| res = new Object[0]; |
| } |
| |
| return res; |
| } |
| |
| } |