| /******************************************************************************* |
| * Copyright (c) 2007 Oracle. |
| * 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: |
| * Oracle - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.jpt.ui.internal.navigator; |
| |
| import java.util.HashMap; |
| import java.util.Map; |
| import org.eclipse.core.runtime.IAdaptable; |
| import org.eclipse.jface.viewers.ILabelProviderListener; |
| import org.eclipse.jface.viewers.LabelProvider; |
| import org.eclipse.jface.viewers.LabelProviderChangedEvent; |
| import org.eclipse.jpt.core.internal.IJpaPlatform; |
| import org.eclipse.jpt.core.internal.context.base.IJpaContextNode; |
| import org.eclipse.jpt.ui.internal.IJpaPlatformUi; |
| import org.eclipse.jpt.ui.internal.JptUiPlugin; |
| import org.eclipse.swt.graphics.Image; |
| import org.eclipse.ui.IMemento; |
| import org.eclipse.ui.navigator.ICommonContentExtensionSite; |
| import org.eclipse.ui.navigator.ICommonLabelProvider; |
| |
| /** |
| * This extension of navigator label provider delegates to the platform UI |
| * (see the org.eclipse.jpt.ui.jpaPlatform extension point) for navigator labels. |
| * |
| * This label provider provides a label for the root "JPA Content" node provided |
| * by the content provider (see {@link JpaNavigatorContentProvider}) and delegates |
| * to the label provider returned by the platform UI implementation for labels |
| * for children of the "JPA Content" node (or for any other sub-node). |
| */ |
| public class JpaNavigatorLabelProvider extends LabelProvider |
| implements ICommonLabelProvider |
| { |
| /** |
| * Exactly *one* of these is created for each view that utilizes it. Therefore, |
| * as we delegate to the platform UI for each project, we should maintain the |
| * same multiplicity. That is, if there is a delegate for each platform UI, we |
| * should maintain *one* delegate for each view. |
| * |
| * Key: platform id, Value: delegate label provider |
| */ |
| private Map<String, ICommonLabelProvider> delegateLabelProviders; |
| |
| private ILabelProviderListener delegateLabelProviderListener; |
| |
| |
| public JpaNavigatorLabelProvider() { |
| super(); |
| delegateLabelProviders = new HashMap<String, ICommonLabelProvider>(); |
| delegateLabelProviderListener = new DelegateLabelProviderListener(); |
| } |
| |
| |
| // **************** IBaseLabelProvider implementation ********************** |
| |
| public void addListener(ILabelProviderListener listener) { |
| super.addListener(listener); |
| } |
| |
| public void removeListener(ILabelProviderListener listener) { |
| super.removeListener(listener); |
| } |
| |
| public boolean isLabelProperty(Object element, String property) { |
| ICommonLabelProvider delegate = getDelegate(element); |
| |
| if (delegate != null) { |
| return delegate.isLabelProperty(element, property); |
| } |
| |
| return super.isLabelProperty(element, property); |
| } |
| |
| public void dispose() { |
| super.dispose(); |
| for (ICommonLabelProvider delegate : delegateLabelProviders.values()) { |
| delegate.dispose(); |
| } |
| delegateLabelProviders.clear(); |
| } |
| |
| |
| // **************** ILabelProvider implementation ************************** |
| |
| public Image getImage(Object element) { |
| ICommonLabelProvider delegate = getDelegate(element); |
| |
| if (delegate != null) { |
| return delegate.getImage(element); |
| } |
| |
| return super.getImage(element); |
| } |
| |
| public String getText(Object element) { |
| ICommonLabelProvider delegate = getDelegate(element); |
| |
| if (delegate != null) { |
| return delegate.getText(element); |
| } |
| |
| return super.getText(element); |
| } |
| |
| |
| // **************** IDescriptionProvider implementation ******************** |
| |
| public String getDescription(Object element) { |
| ICommonLabelProvider delegate = getDelegate(element); |
| |
| if (delegate != null) { |
| return delegate.getDescription(element); |
| } |
| |
| // no "super" implementation - default to getText(..) for description |
| return super.getText(element); |
| } |
| |
| |
| // **************** IMementoAware implementation *************************** |
| |
| public void saveState(IMemento memento) { |
| for (ICommonLabelProvider delegate : delegateLabelProviders.values()) { |
| delegate.saveState(memento); |
| } |
| } |
| |
| public void restoreState(IMemento memento) { |
| for (ICommonLabelProvider delegate : delegateLabelProviders.values()) { |
| delegate.restoreState(memento); |
| } |
| } |
| |
| |
| // **************** ICommonLabelProvider implementation ******************** |
| |
| public void init(ICommonContentExtensionSite config) { |
| for (ICommonLabelProvider delegate : delegateLabelProviders.values()) { |
| delegate.init(config); |
| } |
| } |
| |
| |
| // *************** internal ************************************************ |
| |
| private ICommonLabelProvider getDelegate(Object element) { |
| if (! (element instanceof IAdaptable)) { |
| return null; |
| } |
| |
| IJpaContextNode contextNode = (IJpaContextNode) ((IAdaptable) element).getAdapter(IJpaContextNode.class); |
| |
| if (contextNode == null) { |
| return null; |
| } |
| |
| IJpaPlatform platform = contextNode.jpaProject().jpaPlatform(); |
| IJpaPlatformUi platformUi = JptUiPlugin.getPlugin().jpaPlatformUi(platform); |
| |
| ICommonLabelProvider delegate = delegateLabelProviders.get(platform.getId()); |
| |
| if (delegate == null && platform != null && ! delegateLabelProviders.containsKey(platform.getId())) { |
| delegate = platformUi.buildNavigatorLabelProvider(); |
| delegate.addListener(delegateLabelProviderListener); |
| delegateLabelProviders.put(platform.getId(), delegate); |
| } |
| |
| return delegate; |
| } |
| |
| |
| private class DelegateLabelProviderListener |
| implements ILabelProviderListener |
| { |
| public void labelProviderChanged(LabelProviderChangedEvent event) { |
| fireLabelProviderChanged(event); |
| } |
| } |
| } |