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/*
* 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;
}
}
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