2
|
1 |
/*
|
|
2 |
* Copyright 2003-2007 Sun Microsystems, Inc. All Rights Reserved.
|
|
3 |
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
|
|
4 |
*
|
|
5 |
* This code is free software; you can redistribute it and/or modify it
|
|
6 |
* under the terms of the GNU General Public License version 2 only, as
|
|
7 |
* published by the Free Software Foundation. Sun designates this
|
|
8 |
* particular file as subject to the "Classpath" exception as provided
|
|
9 |
* by Sun in the LICENSE file that accompanied this code.
|
|
10 |
*
|
|
11 |
* This code is distributed in the hope that it will be useful, but WITHOUT
|
|
12 |
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
|
13 |
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
|
|
14 |
* version 2 for more details (a copy is included in the LICENSE file that
|
|
15 |
* accompanied this code).
|
|
16 |
*
|
|
17 |
* You should have received a copy of the GNU General Public License version
|
|
18 |
* 2 along with this work; if not, write to the Free Software Foundation,
|
|
19 |
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
|
|
20 |
*
|
|
21 |
* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
|
|
22 |
* CA 95054 USA or visit www.sun.com if you need additional information or
|
|
23 |
* have any questions.
|
|
24 |
*/
|
|
25 |
|
|
26 |
package sun.awt.X11;
|
|
27 |
|
|
28 |
import java.util.Iterator;
|
|
29 |
|
|
30 |
/**
|
|
31 |
* This class is a registry for the supported drag and drop protocols.
|
|
32 |
*
|
|
33 |
* @since 1.5
|
|
34 |
*/
|
|
35 |
final class XDropTargetEventProcessor {
|
|
36 |
private static final XDropTargetEventProcessor theInstance =
|
|
37 |
new XDropTargetEventProcessor();
|
|
38 |
private static boolean active = false;
|
|
39 |
|
|
40 |
// The current drop protocol.
|
|
41 |
private XDropTargetProtocol protocol = null;
|
|
42 |
|
|
43 |
private XDropTargetEventProcessor() {}
|
|
44 |
|
|
45 |
private boolean doProcessEvent(XEvent ev) {
|
|
46 |
if (ev.get_type() == (int)XlibWrapper.DestroyNotify &&
|
|
47 |
protocol != null &&
|
|
48 |
ev.get_xany().get_window() == protocol.getSourceWindow()) {
|
|
49 |
protocol.cleanup();
|
|
50 |
protocol = null;
|
|
51 |
return false;
|
|
52 |
}
|
|
53 |
|
|
54 |
if (ev.get_type() == (int)XlibWrapper.PropertyNotify) {
|
|
55 |
XPropertyEvent xproperty = ev.get_xproperty();
|
|
56 |
if (xproperty.get_atom() ==
|
|
57 |
MotifDnDConstants.XA_MOTIF_DRAG_RECEIVER_INFO.getAtom()) {
|
|
58 |
|
|
59 |
XDropTargetRegistry.getRegistry().updateEmbedderDropSite(xproperty.get_window());
|
|
60 |
}
|
|
61 |
}
|
|
62 |
|
|
63 |
if (ev.get_type() != (int)XlibWrapper.ClientMessage) {
|
|
64 |
return false;
|
|
65 |
}
|
|
66 |
|
|
67 |
boolean processed = false;
|
|
68 |
XClientMessageEvent xclient = ev.get_xclient();
|
|
69 |
|
|
70 |
XDropTargetProtocol curProtocol = protocol;
|
|
71 |
|
|
72 |
if (protocol != null) {
|
|
73 |
if (protocol.getMessageType(xclient) !=
|
|
74 |
XDropTargetProtocol.UNKNOWN_MESSAGE) {
|
|
75 |
processed = protocol.processClientMessage(xclient);
|
|
76 |
} else {
|
|
77 |
protocol = null;
|
|
78 |
}
|
|
79 |
}
|
|
80 |
|
|
81 |
if (protocol == null) {
|
|
82 |
Iterator dropTargetProtocols =
|
|
83 |
XDragAndDropProtocols.getDropTargetProtocols();
|
|
84 |
|
|
85 |
while (dropTargetProtocols.hasNext()) {
|
|
86 |
XDropTargetProtocol dropTargetProtocol =
|
|
87 |
(XDropTargetProtocol)dropTargetProtocols.next();
|
|
88 |
// Don't try to process it again with the current protocol.
|
|
89 |
if (dropTargetProtocol == curProtocol) {
|
|
90 |
continue;
|
|
91 |
}
|
|
92 |
|
|
93 |
if (dropTargetProtocol.getMessageType(xclient) ==
|
|
94 |
XDropTargetProtocol.UNKNOWN_MESSAGE) {
|
|
95 |
continue;
|
|
96 |
}
|
|
97 |
|
|
98 |
protocol = dropTargetProtocol;
|
|
99 |
processed = protocol.processClientMessage(xclient);
|
|
100 |
break;
|
|
101 |
}
|
|
102 |
}
|
|
103 |
|
|
104 |
return processed;
|
|
105 |
}
|
|
106 |
|
|
107 |
static void reset() {
|
|
108 |
theInstance.protocol = null;
|
|
109 |
}
|
|
110 |
|
|
111 |
static void activate() {
|
|
112 |
active = true;
|
|
113 |
}
|
|
114 |
|
|
115 |
// Fix for 4915454 - do not call doProcessEvent() until the first drop
|
|
116 |
// target is registered to avoid premature loading of DnD protocol
|
|
117 |
// classes.
|
|
118 |
static boolean processEvent(XEvent ev) {
|
|
119 |
return active ? theInstance.doProcessEvent(ev) : false;
|
|
120 |
}
|
|
121 |
}
|