| /******************************************************************************* |
| * Copyright (c) 2008-2011 Chair for Applied Software Engineering, |
| * Technische Universitaet Muenchen. |
| * 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: |
| ******************************************************************************/ |
| package org.eclipse.emf.ecp.navigator; |
| |
| import org.eclipse.core.runtime.CoreException; |
| import org.eclipse.core.runtime.IConfigurationElement; |
| import org.eclipse.core.runtime.Platform; |
| import org.eclipse.emf.edit.provider.ComposedAdapterFactory; |
| import org.eclipse.emf.edit.ui.provider.AdapterFactoryLabelProvider; |
| import org.eclipse.jface.viewers.DecoratingLabelProvider; |
| import org.eclipse.jface.viewers.IBaseLabelProvider; |
| import org.eclipse.jface.viewers.ILabelProvider; |
| import org.eclipse.ui.PlatformUI; |
| |
| /** |
| * Composed Label provider with all registered label providers. |
| * |
| * @author helming |
| * @author emueller |
| */ |
| public class TreeLabelProvider { |
| |
| private ILabelProvider defaultLabelProvider; |
| private IBaseLabelProvider replacedLabelProvider; |
| private ComposedAdapterFactory adapterFactory; |
| |
| /** |
| * Default constructor. |
| */ |
| public TreeLabelProvider() { |
| adapterFactory = new ComposedAdapterFactory(ComposedAdapterFactory.Descriptor.Registry.INSTANCE); |
| defaultLabelProvider = new DecoratingLabelProvider(new AdapterFactoryLabelProvider(adapterFactory), |
| PlatformUI.getWorkbench().getDecoratorManager().getLabelDecorator()); |
| replaceLabelProvider(); |
| } |
| |
| private void replaceLabelProvider() { |
| |
| IConfigurationElement[] confs = Platform.getExtensionRegistry().getConfigurationElementsFor( |
| "org.eclipse.emf.ecp.navigator.replaceLabelProvider"); |
| |
| if (confs.length > 1) { |
| Exception exception = new IllegalStateException("Two or more ReplaceLabel Providers registered"); |
| Activator.getDefault().logException(exception.getMessage(), exception); |
| } else if (confs.length == 1) { |
| IConfigurationElement element = confs[0]; |
| |
| try { |
| replacedLabelProvider = (IBaseLabelProvider) element.createExecutableExtension("class"); |
| } catch (CoreException e) { |
| Activator.getDefault().logException(e.getMessage(), e); |
| } |
| } |
| } |
| |
| /** |
| * Returns the {@link ILabelProvider}. If the default label provider has been replaced, that one |
| * will be returned. If more than one label providers have been registered to replace the default |
| * label provider the first one will be returned. |
| * @return the label provider to be used by the {@link TreeView} |
| */ |
| public IBaseLabelProvider getLabelProvider() { |
| if (replacedLabelProvider != null) { |
| return replacedLabelProvider; |
| } |
| |
| return defaultLabelProvider; |
| } |
| |
| /** |
| * */ |
| public void dispose() { |
| if (adapterFactory!=null) { |
| adapterFactory.dispose(); |
| } |
| |
| } |
| } |