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/*******************************************************************************
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* Copyright (c) 2003, 2008 IBM Corporation and others.
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* All rights reserved. This program and the accompanying materials
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* are made available under the terms of the Eclipse Public License v1.0
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* which accompanies this distribution, and is available at
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* http://www.eclipse.org/legal/epl-v10.html
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*
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* Contributors:
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* IBM Corporation - initial API and implementation
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*******************************************************************************/
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package org.eclipse.ui.internal.navigator;
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import org.eclipse.core.runtime.Assert;
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import org.eclipse.jface.viewers.ILabelProvider;
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import org.eclipse.jface.viewers.IStructuredSelection;
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import org.eclipse.osgi.util.NLS;
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import org.eclipse.ui.navigator.ICommonLabelProvider;
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import org.eclipse.ui.navigator.IDescriptionProvider;
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/**
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*
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* @since 3.2
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*
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*/
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public final class NavigatorContentServiceDescriptionProvider implements
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IDescriptionProvider {
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private final NavigatorContentService contentService;
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/**
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* Creates a description provider that targets the given service.
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*
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* @param aContentService
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* The content service associated with this provider.
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*/
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public NavigatorContentServiceDescriptionProvider(
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NavigatorContentService aContentService) {
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Assert.isNotNull(aContentService);
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contentService = aContentService;
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}
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public String getDescription(Object anElement) {
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Object target;
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if (anElement instanceof IStructuredSelection) {
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IStructuredSelection structuredSelection = (IStructuredSelection) anElement;
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if (structuredSelection.size() > 1) {
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return getDefaultStatusBarMessage(structuredSelection.size());
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}
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target = structuredSelection.getFirstElement();
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} else {
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target = anElement;
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}
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String message = null;
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ILabelProvider[] providers = contentService
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.findRelevantLabelProviders(target);
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if (providers.length == 0) {
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return getDefaultStatusBarMessage(0);
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}
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for (int i = 0; i < providers.length && (message == null || message.length() == 0); i++) {
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if (providers[i] instanceof ICommonLabelProvider) {
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message = ((ICommonLabelProvider) providers[i])
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.getDescription(target);
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}
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}
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message = (message != null) ? message : getDefaultStatusBarMessage(1);
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return message;
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}
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/**
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* @param aSize
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* The number of items selected.
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* @return A string of the form "# items selected"
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*/
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protected final String getDefaultStatusBarMessage(int aSize) {
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return NLS.bind(
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CommonNavigatorMessages.Navigator_statusLineMultiSelect,
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new Object[] { new Integer(aSize) });
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}
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}
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