/*******************************************************************************
* Copyright (c) 2000, 2015 IBM Corporation and others.
* 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:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.e4.ui.workbench.swt.internal.copy;
import org.eclipse.e4.ui.model.application.descriptor.basic.MPartDescriptor;
import org.eclipse.jface.viewers.Viewer;
import org.eclipse.jface.viewers.ViewerComparator;
/**
* Based on org.eclipse.ui.internal.dialogs.ViewComparator
*/
public class ViewComparator extends ViewerComparator {
private final static String EMPTY_STRING = "";
/**
* ViewSorter constructor comment.
*
* @param reg
* an IViewRegistry
*/
public ViewComparator() {
super();
}
/**
* Returns a negative, zero, or positive number depending on whether the
* first element is less than, equal to, or greater than the second element.
*/
@Override
public int compare(Viewer viewer, Object e1, Object e2) {
// place "General" category first
if (WorkbenchSWTMessages.ICategory_general.equals(e1))
return -1;
if (WorkbenchSWTMessages.ICategory_general.equals(e2))
return 1;
String str1;
if (e1 instanceof MPartDescriptor)
str1 = ((MPartDescriptor) e1).getLocalizedLabel();
else
str1 = e1.toString();
String str2;
if (e2 instanceof MPartDescriptor)
str2 = ((MPartDescriptor) e2).getLocalizedLabel();
else
str2 = e2.toString();
if (str1 == null)
str1 = EMPTY_STRING;
if (str2 == null)
str2 = EMPTY_STRING;
return getComparator().compare(str1, str2);
}
}