| /******************************************************************************* |
| * Copyright (c) 2000, 2013 IBM Corporation and others. |
| * |
| * This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License 2.0 |
| * which accompanies this distribution, and is available at |
| * https://www.eclipse.org/legal/epl-2.0/ |
| * |
| * SPDX-License-Identifier: EPL-2.0 |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.ant.internal.ui.preferences; |
| |
| import java.util.ArrayList; |
| import java.util.Arrays; |
| import java.util.List; |
| |
| import org.eclipse.jface.viewers.IStructuredContentProvider; |
| import org.eclipse.jface.viewers.IStructuredSelection; |
| import org.eclipse.jface.viewers.StructuredSelection; |
| import org.eclipse.jface.viewers.TableViewer; |
| import org.eclipse.jface.viewers.Viewer; |
| import org.eclipse.jface.viewers.ViewerComparator; |
| |
| /** |
| * Content provider that maintains a generic list of objects which are shown in a table viewer. |
| */ |
| public class AntContentProvider implements IStructuredContentProvider { |
| protected List<Object> elements = new ArrayList<>(); |
| protected TableViewer tableViewer; |
| private ViewerComparator fComparator = null; |
| /** |
| * @since 3.5 |
| */ |
| private boolean defaultcomparator = true; |
| |
| /** |
| * Default Constructor |
| */ |
| public AntContentProvider() { |
| } |
| |
| /** |
| * Constructor |
| * |
| * @param defaultcomparator |
| * if the default comparator should be used for the returned data |
| * @since 3.5 |
| */ |
| public AntContentProvider(boolean defaultcomparator) { |
| this.defaultcomparator = defaultcomparator; |
| } |
| |
| /** |
| * Add an element to the current listing of elements and to the underlying viewer. Does nothing if the listing already contains the given element |
| * |
| * @param o |
| */ |
| public void add(Object o) { |
| if (elements.contains(o)) { |
| return; |
| } |
| elements.add(o); |
| tableViewer.add(o); |
| tableViewer.setSelection(new StructuredSelection(o), true); |
| } |
| |
| /* |
| * (non-Javadoc) |
| * |
| * @see org.eclipse.jface.viewers.IContentProvider#dispose() |
| */ |
| @Override |
| public void dispose() { |
| // do nothing |
| } |
| |
| /* |
| * (non-Javadoc) |
| * |
| * @see org.eclipse.jface.viewers.IStructuredContentProvider#getElements(java.lang.Object) |
| */ |
| @Override |
| public Object[] getElements(Object inputElement) { |
| return elements.toArray(); |
| } |
| |
| /* |
| * (non-Javadoc) |
| * |
| * @see org.eclipse.jface.viewers.IContentProvider#inputChanged(org.eclipse.jface.viewers.Viewer, java.lang.Object, java.lang.Object) |
| */ |
| @Override |
| public void inputChanged(Viewer viewer, Object oldInput, Object newInput) { |
| tableViewer = (TableViewer) viewer; |
| elements.clear(); |
| if (newInput != null) { |
| if (defaultcomparator) { |
| tableViewer.setComparator(getComparator()); |
| } |
| List<?> list; |
| if (newInput instanceof List) { |
| list = ((List<?>) newInput); |
| } else { |
| list = Arrays.asList((Object[]) newInput); |
| } |
| elements.addAll(list); |
| } |
| } |
| |
| /** |
| * Removes the given element from the listing of elements and from the backing viewer. |
| * |
| * @param o |
| */ |
| public void remove(Object o) { |
| elements.remove(o); |
| tableViewer.remove(o); |
| } |
| |
| /** |
| * Removes the given selection of the listing of elements and from the backing viewer |
| * |
| * @param selection |
| */ |
| public void remove(IStructuredSelection selection) { |
| Object[] array = selection.toArray(); |
| elements.removeAll(Arrays.asList(array)); |
| tableViewer.remove(array); |
| } |
| |
| /** |
| * Returns the default comparator which compares the {@link #toString()} value of the elements for ordering |
| * |
| * @return the default comparator |
| */ |
| protected ViewerComparator getComparator() { |
| if (fComparator == null) { |
| fComparator = new ViewerComparator() { |
| /* |
| * (non-Javadoc) |
| * |
| * @see org.eclipse.jface.viewers.ViewerComparator#compare(org.eclipse.jface.viewers.Viewer, java.lang.Object, java.lang.Object) |
| */ |
| @Override |
| public int compare(Viewer viewer, Object e1, Object e2) { |
| return e1.toString().compareToIgnoreCase(e2.toString()); |
| } |
| }; |
| } |
| return fComparator; |
| } |
| } |