| /* |
| * Copyright (c) 2003, 2007, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package sun.awt.X11; |
| |
| import java.util.ArrayList; |
| import java.util.Collections; |
| import java.util.Iterator; |
| import java.util.List; |
| |
| /** |
| * This class is a registry for the supported drag and drop protocols. |
| * |
| * @since 1.5 |
| */ |
| final class XDragAndDropProtocols { |
| private static final List<XDragSourceProtocol> dragProtocols; |
| private static final List<XDropTargetProtocol> dropProtocols; |
| |
| public static final String XDnD = "XDnD"; |
| public static final String MotifDnD = "MotifDnD"; |
| |
| static { |
| // Singleton listener for all drag source protocols. |
| XDragSourceProtocolListener dragSourceProtocolListener = |
| XDragSourceContextPeer.getXDragSourceProtocolListener(); |
| // Singleton listener for all drop target protocols. |
| XDropTargetProtocolListener dropTargetProtocolListener = |
| XDropTargetContextPeer.getXDropTargetProtocolListener(); |
| |
| List<XDragSourceProtocol> tDragSourceProtocols = new ArrayList<>(); |
| XDragSourceProtocol xdndDragSourceProtocol = |
| XDnDDragSourceProtocol.createInstance(dragSourceProtocolListener); |
| tDragSourceProtocols.add(xdndDragSourceProtocol); |
| XDragSourceProtocol motifdndDragSourceProtocol = |
| MotifDnDDragSourceProtocol.createInstance(dragSourceProtocolListener); |
| tDragSourceProtocols.add(motifdndDragSourceProtocol); |
| |
| List<XDropTargetProtocol> tDropTargetProtocols = new ArrayList<>(); |
| XDropTargetProtocol xdndDropTargetProtocol = |
| XDnDDropTargetProtocol.createInstance(dropTargetProtocolListener); |
| tDropTargetProtocols.add(xdndDropTargetProtocol); |
| XDropTargetProtocol motifdndDropTargetProtocol = |
| MotifDnDDropTargetProtocol.createInstance(dropTargetProtocolListener); |
| tDropTargetProtocols.add(motifdndDropTargetProtocol); |
| |
| dragProtocols = Collections.unmodifiableList(tDragSourceProtocols); |
| dropProtocols = Collections.unmodifiableList(tDropTargetProtocols); |
| } |
| |
| static Iterator<XDragSourceProtocol> getDragSourceProtocols() { |
| return dragProtocols.iterator(); |
| } |
| |
| static Iterator<XDropTargetProtocol> getDropTargetProtocols() { |
| return dropProtocols.iterator(); |
| } |
| |
| /* |
| * Returns a XDragSourceProtocol whose name equals to the specified string |
| * or null if no such protocol is registered. |
| */ |
| public static XDragSourceProtocol getDragSourceProtocol(String name) { |
| // Protocol name cannot be null. |
| if (name == null) { |
| return null; |
| } |
| |
| Iterator<XDragSourceProtocol> dragProtocols = |
| XDragAndDropProtocols.getDragSourceProtocols(); |
| while (dragProtocols.hasNext()) { |
| XDragSourceProtocol dragProtocol = dragProtocols.next(); |
| if (dragProtocol.getProtocolName().equals(name)) { |
| return dragProtocol; |
| } |
| } |
| |
| return null; |
| } |
| |
| /* |
| * Returns a XDropTargetProtocol which name equals to the specified string |
| * or null if no such protocol is registered. |
| */ |
| public static XDropTargetProtocol getDropTargetProtocol(String name) { |
| // Protocol name cannot be null. |
| if (name == null) { |
| return null; |
| } |
| |
| Iterator<XDropTargetProtocol> dropProtocols = |
| XDragAndDropProtocols.getDropTargetProtocols(); |
| while (dropProtocols.hasNext()) { |
| XDropTargetProtocol dropProtocol = dropProtocols.next(); |
| if (dropProtocol.getProtocolName().equals(name)) { |
| return dropProtocol; |
| } |
| } |
| |
| return null; |
| } |
| } |