Java example source code file (XDnDDropTargetProtocol.java)
The XDnDDropTargetProtocol.java Java example source code/*
* Copyright (c) 2003, 2013, 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.awt.Point;
import java.awt.dnd.DnDConstants;
import java.awt.event.MouseEvent;
import java.io.IOException;
import sun.util.logging.PlatformLogger;
import sun.misc.Unsafe;
/**
* XDropTargetProtocol implementation for XDnD protocol.
*
* @since 1.5
*/
class XDnDDropTargetProtocol extends XDropTargetProtocol {
private static final PlatformLogger logger =
PlatformLogger.getLogger("sun.awt.X11.xembed.xdnd.XDnDDropTargetProtocol");
private static final Unsafe unsafe = XlibWrapper.unsafe;
private long sourceWindow = 0;
private long sourceWindowMask = 0;
private int sourceProtocolVersion = 0;
private int sourceActions = DnDConstants.ACTION_NONE;
private long[] sourceFormats = null;
private boolean trackSourceActions = false;
private int userAction = DnDConstants.ACTION_NONE;
private int sourceX = 0;
private int sourceY = 0;
private XWindow targetXWindow = null;
// XEmbed stuff.
private long prevCtxt = 0;
private boolean overXEmbedClient = false;
protected XDnDDropTargetProtocol(XDropTargetProtocolListener listener) {
super(listener);
}
/**
* Creates an instance associated with the specified listener.
*
* @throws NullPointerException if listener is <code>null.
*/
static XDropTargetProtocol createInstance(XDropTargetProtocolListener listener) {
return new XDnDDropTargetProtocol(listener);
}
public String getProtocolName() {
return XDragAndDropProtocols.XDnD;
}
public void registerDropTarget(long window) {
assert XToolkit.isAWTLockHeldByCurrentThread();
long data = Native.allocateLongArray(1);
try {
Native.putLong(data, 0, XDnDConstants.XDND_PROTOCOL_VERSION);
XErrorHandlerUtil.WITH_XERROR_HANDLER(XErrorHandler.VerifyChangePropertyHandler.getInstance());
XDnDConstants.XA_XdndAware.setAtomData(window, XAtom.XA_ATOM, data, 1);
XErrorHandlerUtil.RESTORE_XERROR_HANDLER();
if ((XErrorHandlerUtil.saved_error != null) &&
(XErrorHandlerUtil.saved_error.get_error_code() != XConstants.Success)) {
throw new XException("Cannot write XdndAware property");
}
} finally {
unsafe.freeMemory(data);
data = 0;
}
}
public void unregisterDropTarget(long window) {
assert XToolkit.isAWTLockHeldByCurrentThread();
XDnDConstants.XA_XdndAware.DeleteProperty(window);
}
public void registerEmbedderDropSite(long embedder) {
assert XToolkit.isAWTLockHeldByCurrentThread();
boolean overriden = false;
int version = 0;
long proxy = 0;
long newProxy = XDropTargetRegistry.getDnDProxyWindow();
int status = 0;
WindowPropertyGetter wpg1 =
new WindowPropertyGetter(embedder, XDnDConstants.XA_XdndAware, 0, 1,
false, XConstants.AnyPropertyType);
try {
status = wpg1.execute(XErrorHandler.IgnoreBadWindowHandler.getInstance());
if (status == XConstants.Success &&
wpg1.getData() != 0 && wpg1.getActualType() == XAtom.XA_ATOM) {
overriden = true;
version = (int)Native.getLong(wpg1.getData());
}
} finally {
wpg1.dispose();
}
/* XdndProxy is not supported for prior to XDnD version 4 */
if (overriden && version >= 4) {
WindowPropertyGetter wpg2 =
new WindowPropertyGetter(embedder, XDnDConstants.XA_XdndProxy,
0, 1, false, XAtom.XA_WINDOW);
try {
status = wpg2.execute(XErrorHandler.IgnoreBadWindowHandler.getInstance());
if (status == XConstants.Success &&
wpg2.getData() != 0 &&
wpg2.getActualType() == XAtom.XA_WINDOW) {
proxy = Native.getLong(wpg2.getData());
}
} finally {
wpg2.dispose();
}
if (proxy != 0) {
WindowPropertyGetter wpg3 =
new WindowPropertyGetter(proxy, XDnDConstants.XA_XdndProxy,
0, 1, false, XAtom.XA_WINDOW);
try {
status = wpg3.execute(XErrorHandler.IgnoreBadWindowHandler.getInstance());
if (status != XConstants.Success ||
wpg3.getData() == 0 ||
wpg3.getActualType() != XAtom.XA_WINDOW ||
Native.getLong(wpg3.getData()) != proxy) {
proxy = 0;
} else {
WindowPropertyGetter wpg4 =
new WindowPropertyGetter(proxy,
XDnDConstants.XA_XdndAware,
0, 1, false,
XConstants.AnyPropertyType);
try {
status = wpg4.execute(XErrorHandler.IgnoreBadWindowHandler.getInstance());
if (status != XConstants.Success ||
wpg4.getData() == 0 ||
wpg4.getActualType() != XAtom.XA_ATOM) {
proxy = 0;
}
} finally {
wpg4.dispose();
}
}
} finally {
wpg3.dispose();
}
}
}
if (proxy == newProxy) {
// Embedder already registered.
return;
}
long data = Native.allocateLongArray(1);
try {
Native.putLong(data, 0, XDnDConstants.XDND_PROTOCOL_VERSION);
/* The proxy window must have the XdndAware set, as XDnD protocol
prescribes to check the proxy window for XdndAware. */
XErrorHandlerUtil.WITH_XERROR_HANDLER(XErrorHandler.VerifyChangePropertyHandler.getInstance());
XDnDConstants.XA_XdndAware.setAtomData(newProxy, XAtom.XA_ATOM,
data, 1);
XErrorHandlerUtil.RESTORE_XERROR_HANDLER();
if ((XErrorHandlerUtil.saved_error != null) &&
(XErrorHandlerUtil.saved_error.get_error_code() != XConstants.Success)) {
throw new XException("Cannot write XdndAware property");
}
Native.putLong(data, 0, newProxy);
/* The proxy window must have the XdndProxy set to point to itself.*/
XErrorHandlerUtil.WITH_XERROR_HANDLER(XErrorHandler.VerifyChangePropertyHandler.getInstance());
XDnDConstants.XA_XdndProxy.setAtomData(newProxy, XAtom.XA_WINDOW,
data, 1);
XErrorHandlerUtil.RESTORE_XERROR_HANDLER();
if ((XErrorHandlerUtil.saved_error != null) &&
(XErrorHandlerUtil.saved_error.get_error_code() != XConstants.Success)) {
throw new XException("Cannot write XdndProxy property");
}
Native.putLong(data, 0, XDnDConstants.XDND_PROTOCOL_VERSION);
XErrorHandlerUtil.WITH_XERROR_HANDLER(XErrorHandler.VerifyChangePropertyHandler.getInstance());
XDnDConstants.XA_XdndAware.setAtomData(embedder, XAtom.XA_ATOM,
data, 1);
XErrorHandlerUtil.RESTORE_XERROR_HANDLER();
if ((XErrorHandlerUtil.saved_error != null) &&
(XErrorHandlerUtil.saved_error.get_error_code() != XConstants.Success)) {
throw new XException("Cannot write XdndAware property");
}
Native.putLong(data, 0, newProxy);
XErrorHandlerUtil.WITH_XERROR_HANDLER(XErrorHandler.VerifyChangePropertyHandler.getInstance());
XDnDConstants.XA_XdndProxy.setAtomData(embedder, XAtom.XA_WINDOW,
data, 1);
XErrorHandlerUtil.RESTORE_XERROR_HANDLER();
if ((XErrorHandlerUtil.saved_error != null) &&
(XErrorHandlerUtil.saved_error.get_error_code() != XConstants.Success)) {
throw new XException("Cannot write XdndProxy property");
}
} finally {
unsafe.freeMemory(data);
data = 0;
}
putEmbedderRegistryEntry(embedder, overriden, version, proxy);
}
public void unregisterEmbedderDropSite(long embedder) {
assert XToolkit.isAWTLockHeldByCurrentThread();
EmbedderRegistryEntry entry = getEmbedderRegistryEntry(embedder);
if (entry == null) {
return;
}
if (entry.isOverriden()) {
long data = Native.allocateLongArray(1);
try {
Native.putLong(data, 0, entry.getVersion());
XErrorHandlerUtil.WITH_XERROR_HANDLER(XErrorHandler.VerifyChangePropertyHandler.getInstance());
XDnDConstants.XA_XdndAware.setAtomData(embedder, XAtom.XA_ATOM,
data, 1);
XErrorHandlerUtil.RESTORE_XERROR_HANDLER();
if ((XErrorHandlerUtil.saved_error != null) &&
(XErrorHandlerUtil.saved_error.get_error_code() != XConstants.Success)) {
throw new XException("Cannot write XdndAware property");
}
Native.putLong(data, 0, (int)entry.getProxy());
XErrorHandlerUtil.WITH_XERROR_HANDLER(XErrorHandler.VerifyChangePropertyHandler.getInstance());
XDnDConstants.XA_XdndProxy.setAtomData(embedder, XAtom.XA_WINDOW,
data, 1);
XErrorHandlerUtil.RESTORE_XERROR_HANDLER();
if ((XErrorHandlerUtil.saved_error != null) &&
(XErrorHandlerUtil.saved_error.get_error_code() != XConstants.Success)) {
throw new XException("Cannot write XdndProxy property");
}
} finally {
unsafe.freeMemory(data);
data = 0;
}
} else {
XDnDConstants.XA_XdndAware.DeleteProperty(embedder);
XDnDConstants.XA_XdndProxy.DeleteProperty(embedder);
}
}
/*
* Gets and stores in the registry the embedder's XDnD drop site info
* from the embedded.
*/
public void registerEmbeddedDropSite(long embedded) {
assert XToolkit.isAWTLockHeldByCurrentThread();
boolean overriden = false;
int version = 0;
long proxy = 0;
long newProxy = XDropTargetRegistry.getDnDProxyWindow();
int status = 0;
WindowPropertyGetter wpg1 =
new WindowPropertyGetter(embedded, XDnDConstants.XA_XdndAware, 0, 1,
false, XConstants.AnyPropertyType);
try {
status = wpg1.execute(XErrorHandler.IgnoreBadWindowHandler.getInstance());
if (status == XConstants.Success &&
wpg1.getData() != 0 && wpg1.getActualType() == XAtom.XA_ATOM) {
overriden = true;
version = (int)Native.getLong(wpg1.getData());
}
} finally {
wpg1.dispose();
}
/* XdndProxy is not supported for prior to XDnD version 4 */
if (overriden && version >= 4) {
WindowPropertyGetter wpg2 =
new WindowPropertyGetter(embedded, XDnDConstants.XA_XdndProxy,
0, 1, false, XAtom.XA_WINDOW);
try {
status = wpg2.execute(XErrorHandler.IgnoreBadWindowHandler.getInstance());
if (status == XConstants.Success &&
wpg2.getData() != 0 &&
wpg2.getActualType() == XAtom.XA_WINDOW) {
proxy = Native.getLong(wpg2.getData());
}
} finally {
wpg2.dispose();
}
if (proxy != 0) {
WindowPropertyGetter wpg3 =
new WindowPropertyGetter(proxy, XDnDConstants.XA_XdndProxy,
0, 1, false, XAtom.XA_WINDOW);
try {
status = wpg3.execute(XErrorHandler.IgnoreBadWindowHandler.getInstance());
if (status != XConstants.Success ||
wpg3.getData() == 0 ||
wpg3.getActualType() != XAtom.XA_WINDOW ||
Native.getLong(wpg3.getData()) != proxy) {
proxy = 0;
} else {
WindowPropertyGetter wpg4 =
new WindowPropertyGetter(proxy,
XDnDConstants.XA_XdndAware,
0, 1, false,
XConstants.AnyPropertyType);
try {
status = wpg4.execute(XErrorHandler.IgnoreBadWindowHandler.getInstance());
if (status != XConstants.Success ||
wpg4.getData() == 0 ||
wpg4.getActualType() != XAtom.XA_ATOM) {
proxy = 0;
}
} finally {
wpg4.dispose();
}
}
} finally {
wpg3.dispose();
}
}
}
putEmbedderRegistryEntry(embedded, overriden, version, proxy);
}
public boolean isProtocolSupported(long window) {
assert XToolkit.isAWTLockHeldByCurrentThread();
WindowPropertyGetter wpg1 =
new WindowPropertyGetter(window, XDnDConstants.XA_XdndAware, 0, 1,
false, XConstants.AnyPropertyType);
try {
int status = wpg1.execute(XErrorHandler.IgnoreBadWindowHandler.getInstance());
if (status == XConstants.Success &&
wpg1.getData() != 0 && wpg1.getActualType() == XAtom.XA_ATOM) {
return true;
} else {
return false;
}
} finally {
wpg1.dispose();
}
}
private boolean processXdndEnter(XClientMessageEvent xclient) {
long source_win = 0;
long source_win_mask = 0;
int protocol_version = 0;
int actions = DnDConstants.ACTION_NONE;
boolean track = true;
long[] formats = null;
if (getSourceWindow() != 0) {
return false;
}
if (!(XToolkit.windowToXWindow(xclient.get_window()) instanceof XWindow)
&& getEmbedderRegistryEntry(xclient.get_window()) == null) {
return false;
}
if (xclient.get_message_type() != XDnDConstants.XA_XdndEnter.getAtom()){
return false;
}
protocol_version =
(int)((xclient.get_data(1) & XDnDConstants.XDND_PROTOCOL_MASK) >>
XDnDConstants.XDND_PROTOCOL_SHIFT);
/* XDnD compliance only requires supporting version 3 and up. */
if (protocol_version < XDnDConstants.XDND_MIN_PROTOCOL_VERSION) {
return false;
}
/* Ignore the source if the protocol version is higher than we support. */
if (protocol_version > XDnDConstants.XDND_PROTOCOL_VERSION) {
return false;
}
source_win = xclient.get_data(0);
/* Extract the list of supported actions. */
if (protocol_version < 2) {
/* Prior to XDnD version 2 only COPY action was supported. */
actions = DnDConstants.ACTION_COPY;
} else {
WindowPropertyGetter wpg =
new WindowPropertyGetter(source_win,
XDnDConstants.XA_XdndActionList,
0, 0xFFFF, false,
XAtom.XA_ATOM);
try {
wpg.execute(XErrorHandler.IgnoreBadWindowHandler.getInstance());
if (wpg.getActualType() == XAtom.XA_ATOM &&
wpg.getActualFormat() == 32) {
long data = wpg.getData();
for (int i = 0; i < wpg.getNumberOfItems(); i++) {
actions |=
XDnDConstants.getJavaActionForXDnDAction(Native.getLong(data, i));
}
} else {
/*
* According to XDnD protocol, XdndActionList is optional.
* If XdndActionList is not set we try to guess which actions are
* supported.
*/
actions = DnDConstants.ACTION_COPY;
track = true;
}
} finally {
wpg.dispose();
}
}
/* Extract the available data types. */
if ((xclient.get_data(1) & XDnDConstants.XDND_DATA_TYPES_BIT) != 0) {
WindowPropertyGetter wpg =
new WindowPropertyGetter(source_win,
XDnDConstants.XA_XdndTypeList,
0, 0xFFFF, false,
XAtom.XA_ATOM);
try {
wpg.execute(XErrorHandler.IgnoreBadWindowHandler.getInstance());
if (wpg.getActualType() == XAtom.XA_ATOM &&
wpg.getActualFormat() == 32) {
formats = Native.toLongs(wpg.getData(),
wpg.getNumberOfItems());
} else {
formats = new long[0];
}
} finally {
wpg.dispose();
}
} else {
int countFormats = 0;
long[] formats3 = new long[3];
for (int i = 0; i < 3; i++) {
long j;
if ((j = xclient.get_data(2 + i)) != XConstants.None) {
formats3[countFormats++] = j;
}
}
formats = new long[countFormats];
System.arraycopy(formats3, 0, formats, 0, countFormats);
}
assert XToolkit.isAWTLockHeldByCurrentThread();
/*
* Select for StructureNotifyMask to receive DestroyNotify in case of source
* crash.
*/
XWindowAttributes wattr = new XWindowAttributes();
try {
XErrorHandlerUtil.WITH_XERROR_HANDLER(XErrorHandler.IgnoreBadWindowHandler.getInstance());
int status = XlibWrapper.XGetWindowAttributes(XToolkit.getDisplay(),
source_win, wattr.pData);
XErrorHandlerUtil.RESTORE_XERROR_HANDLER();
if ((status == 0) ||
((XErrorHandlerUtil.saved_error != null) &&
(XErrorHandlerUtil.saved_error.get_error_code() != XConstants.Success))) {
throw new XException("XGetWindowAttributes failed");
}
source_win_mask = wattr.get_your_event_mask();
} finally {
wattr.dispose();
}
XErrorHandlerUtil.WITH_XERROR_HANDLER(XErrorHandler.IgnoreBadWindowHandler.getInstance());
XlibWrapper.XSelectInput(XToolkit.getDisplay(), source_win,
source_win_mask |
XConstants.StructureNotifyMask);
XErrorHandlerUtil.RESTORE_XERROR_HANDLER();
if ((XErrorHandlerUtil.saved_error != null) &&
(XErrorHandlerUtil.saved_error.get_error_code() != XConstants.Success)) {
throw new XException("XSelectInput failed");
}
sourceWindow = source_win;
sourceWindowMask = source_win_mask;
sourceProtocolVersion = protocol_version;
sourceActions = actions;
sourceFormats = formats;
trackSourceActions = track;
return true;
}
private boolean processXdndPosition(XClientMessageEvent xclient) {
long time_stamp = (int)XConstants.CurrentTime;
long xdnd_action = 0;
int java_action = DnDConstants.ACTION_NONE;
int x = 0;
int y = 0;
/* Ignore XDnD messages from all other windows. */
if (sourceWindow != xclient.get_data(0)) {
return false;
}
XWindow xwindow = null;
{
XBaseWindow xbasewindow = XToolkit.windowToXWindow(xclient.get_window());
if (xbasewindow instanceof XWindow) {
xwindow = (XWindow)xbasewindow;
}
}
x = (int)(xclient.get_data(2) >> 16);
y = (int)(xclient.get_data(2) & 0xFFFF);
if (xwindow == null) {
long receiver =
XDropTargetRegistry.getRegistry().getEmbeddedDropSite(
xclient.get_window(), x, y);
if (receiver != 0) {
XBaseWindow xbasewindow = XToolkit.windowToXWindow(receiver);
if (xbasewindow instanceof XWindow) {
xwindow = (XWindow)xbasewindow;
}
}
}
if (xwindow != null) {
/* Translate mouse position from root coordinates
to the target window coordinates. */
Point p = xwindow.toLocal(x, y);
x = p.x;
y = p.y;
}
/* Time stamp - new in XDnD version 1. */
if (sourceProtocolVersion > 0) {
time_stamp = xclient.get_data(3);
}
/* User action - new in XDnD version 2. */
if (sourceProtocolVersion > 1) {
xdnd_action = xclient.get_data(4);
} else {
/* The default action is XdndActionCopy */
xdnd_action = XDnDConstants.XA_XdndActionCopy.getAtom();
}
java_action = XDnDConstants.getJavaActionForXDnDAction(xdnd_action);
if (trackSourceActions) {
sourceActions |= java_action;
}
if (xwindow == null) {
if (targetXWindow != null) {
notifyProtocolListener(targetXWindow, x, y,
DnDConstants.ACTION_NONE, xclient,
MouseEvent.MOUSE_EXITED);
}
} else {
int java_event_id = 0;
if (targetXWindow == null) {
java_event_id = MouseEvent.MOUSE_ENTERED;
} else {
java_event_id = MouseEvent.MOUSE_DRAGGED;
}
notifyProtocolListener(xwindow, x, y, java_action, xclient,
java_event_id);
}
userAction = java_action;
sourceX = x;
sourceY = y;
targetXWindow = xwindow;
return true;
}
private boolean processXdndLeave(XClientMessageEvent xclient) {
/* Ignore XDnD messages from all other windows. */
if (sourceWindow != xclient.get_data(0)) {
return false;
}
cleanup();
return true;
}
private boolean processXdndDrop(XClientMessageEvent xclient) {
/* Ignore XDnD messages from all other windows. */
if (sourceWindow != xclient.get_data(0)) {
return false;
}
if (targetXWindow != null) {
notifyProtocolListener(targetXWindow, sourceX, sourceY, userAction,
xclient, MouseEvent.MOUSE_RELEASED);
}
return true;
}
public int getMessageType(XClientMessageEvent xclient) {
long messageType = xclient.get_message_type();
if (messageType == XDnDConstants.XA_XdndEnter.getAtom()) {
return ENTER_MESSAGE;
} else if (messageType == XDnDConstants.XA_XdndPosition.getAtom()) {
return MOTION_MESSAGE;
} else if (messageType == XDnDConstants.XA_XdndLeave.getAtom()) {
return LEAVE_MESSAGE;
} else if (messageType == XDnDConstants.XA_XdndDrop.getAtom()) {
return DROP_MESSAGE;
} else {
return UNKNOWN_MESSAGE;
}
}
protected boolean processClientMessageImpl(XClientMessageEvent xclient) {
long messageType = xclient.get_message_type();
if (messageType == XDnDConstants.XA_XdndEnter.getAtom()) {
return processXdndEnter(xclient);
} else if (messageType == XDnDConstants.XA_XdndPosition.getAtom()) {
return processXdndPosition(xclient);
} else if (messageType == XDnDConstants.XA_XdndLeave.getAtom()) {
return processXdndLeave(xclient);
} else if (messageType == XDnDConstants.XA_XdndDrop.getAtom()) {
return processXdndDrop(xclient);
} else {
return false;
}
}
protected void sendEnterMessageToToplevel(long toplevel,
XClientMessageEvent xclient) {
/* flags */
long data1 = sourceProtocolVersion << XDnDConstants.XDND_PROTOCOL_SHIFT;
if (sourceFormats != null && sourceFormats.length > 3) {
data1 |= XDnDConstants.XDND_DATA_TYPES_BIT;
}
long data2 = sourceFormats.length > 0 ? sourceFormats[0] : 0;
long data3 = sourceFormats.length > 1 ? sourceFormats[1] : 0;
long data4 = sourceFormats.length > 2 ? sourceFormats[2] : 0;
sendEnterMessageToToplevelImpl(toplevel, xclient.get_data(0),
data1, data2, data3, data4);
}
private void sendEnterMessageToToplevelImpl(long toplevel,
long sourceWindow,
long data1, long data2,
long data3, long data4) {
XClientMessageEvent enter = new XClientMessageEvent();
try {
enter.set_type((int)XConstants.ClientMessage);
enter.set_window(toplevel);
enter.set_format(32);
enter.set_message_type(XDnDConstants.XA_XdndEnter.getAtom());
/* XID of the source window */
enter.set_data(0, sourceWindow);
enter.set_data(1, data1);
enter.set_data(2, data2);
enter.set_data(3, data3);
enter.set_data(4, data4);
forwardClientMessageToToplevel(toplevel, enter);
} finally {
enter.dispose();
}
}
protected void sendLeaveMessageToToplevel(long toplevel,
XClientMessageEvent xclient) {
sendLeaveMessageToToplevelImpl(toplevel, xclient.get_data(0));
}
protected void sendLeaveMessageToToplevelImpl(long toplevel,
long sourceWindow) {
XClientMessageEvent leave = new XClientMessageEvent();
try {
leave.set_type((int)XConstants.ClientMessage);
leave.set_window(toplevel);
leave.set_format(32);
leave.set_message_type(XDnDConstants.XA_XdndLeave.getAtom());
/* XID of the source window */
leave.set_data(0, sourceWindow);
/* flags */
leave.set_data(1, 0);
forwardClientMessageToToplevel(toplevel, leave);
} finally {
leave.dispose();
}
}
public boolean sendResponse(long ctxt, int eventID, int action) {
XClientMessageEvent xclient = new XClientMessageEvent(ctxt);
if (xclient.get_message_type() !=
XDnDConstants.XA_XdndPosition.getAtom()) {
return false;
}
if (eventID == MouseEvent.MOUSE_EXITED) {
action = DnDConstants.ACTION_NONE;
}
XClientMessageEvent msg = new XClientMessageEvent();
try {
msg.set_type((int)XConstants.ClientMessage);
msg.set_window(xclient.get_data(0));
msg.set_format(32);
msg.set_message_type(XDnDConstants.XA_XdndStatus.getAtom());
/* target window */
msg.set_data(0, xclient.get_window());
/* flags */
long flags = 0;
if (action != DnDConstants.ACTION_NONE) {
flags |= XDnDConstants.XDND_ACCEPT_DROP_FLAG;
}
msg.set_data(1, flags);
/* specify an empty rectangle */
msg.set_data(2, 0); /* x, y */
msg.set_data(3, 0); /* w, h */
/* action accepted by the target */
msg.set_data(4, XDnDConstants.getXDnDActionForJavaAction(action));
XToolkit.awtLock();
try {
XlibWrapper.XSendEvent(XToolkit.getDisplay(),
xclient.get_data(0),
false, XConstants.NoEventMask,
msg.pData);
} finally {
XToolkit.awtUnlock();
}
} finally {
msg.dispose();
}
return true;
}
public Object getData(long ctxt, long format)
throws IllegalArgumentException, IOException {
XClientMessageEvent xclient = new XClientMessageEvent(ctxt);
long message_type = xclient.get_message_type();
long time_stamp = XConstants.CurrentTime;
// NOTE: we assume that the source supports at least version 1, so we
// can use the time stamp
if (message_type == XDnDConstants.XA_XdndPosition.getAtom()) {
// X server time is an unsigned 32-bit number!
time_stamp = xclient.get_data(3) & 0xFFFFFFFFL;
} else if (message_type == XDnDConstants.XA_XdndDrop.getAtom()) {
// X server time is an unsigned 32-bit number!
time_stamp = xclient.get_data(2) & 0xFFFFFFFFL;
} else {
throw new IllegalArgumentException();
}
return XDnDConstants.XDnDSelection.getData(format, time_stamp);
}
public boolean sendDropDone(long ctxt, boolean success, int dropAction) {
XClientMessageEvent xclient = new XClientMessageEvent(ctxt);
if (xclient.get_message_type() !=
XDnDConstants.XA_XdndDrop.getAtom()) {
return false;
}
/*
* The XDnD protocol recommends that the target requests the special
* target DELETE in case if the drop action is XdndActionMove.
*/
if (dropAction == DnDConstants.ACTION_MOVE && success) {
long time_stamp = xclient.get_data(2);
long xdndSelectionAtom =
XDnDConstants.XDnDSelection.getSelectionAtom().getAtom();
XToolkit.awtLock();
try {
XlibWrapper.XConvertSelection(XToolkit.getDisplay(),
xdndSelectionAtom,
XAtom.get("DELETE").getAtom(),
XAtom.get("XAWT_SELECTION").getAtom(),
XWindow.getXAWTRootWindow().getWindow(),
time_stamp);
} finally {
XToolkit.awtUnlock();
}
}
XClientMessageEvent msg = new XClientMessageEvent();
try {
msg.set_type((int)XConstants.ClientMessage);
msg.set_window(xclient.get_data(0));
msg.set_format(32);
msg.set_message_type(XDnDConstants.XA_XdndFinished.getAtom());
msg.set_data(0, xclient.get_window()); /* target window */
msg.set_data(1, 0); /* flags */
/* specify an empty rectangle */
msg.set_data(2, 0);
if (sourceProtocolVersion >= 5) {
if (success) {
msg.set_data(1, XDnDConstants.XDND_ACCEPT_DROP_FLAG);
}
/* action performed by the target */
msg.set_data(2, XDnDConstants.getXDnDActionForJavaAction(dropAction));
}
msg.set_data(3, 0);
msg.set_data(4, 0);
XToolkit.awtLock();
try {
XlibWrapper.XSendEvent(XToolkit.getDisplay(),
xclient.get_data(0),
false, XConstants.NoEventMask,
msg.pData);
} finally {
XToolkit.awtUnlock();
}
} finally {
msg.dispose();
}
/*
* Flush the buffer to guarantee that the drop completion event is sent
* to the source before the method returns.
*/
XToolkit.awtLock();
try {
XlibWrapper.XFlush(XToolkit.getDisplay());
} finally {
XToolkit.awtUnlock();
}
/* Trick to prevent cleanup() from posting dragExit */
targetXWindow = null;
/* Cannot do cleanup before the drop finishes as we may need
source protocol version to send drop finished message. */
cleanup();
return true;
}
public final long getSourceWindow() {
return sourceWindow;
}
/**
* Reset the state of the object.
*/
public void cleanup() {
// Clear the reference to this protocol.
XDropTargetEventProcessor.reset();
if (targetXWindow != null) {
notifyProtocolListener(targetXWindow, 0, 0,
DnDConstants.ACTION_NONE, null,
MouseEvent.MOUSE_EXITED);
}
if (sourceWindow != 0) {
XToolkit.awtLock();
try {
XErrorHandlerUtil.WITH_XERROR_HANDLER(XErrorHandler.IgnoreBadWindowHandler.getInstance());
XlibWrapper.XSelectInput(XToolkit.getDisplay(), sourceWindow,
sourceWindowMask);
XErrorHandlerUtil.RESTORE_XERROR_HANDLER();
} finally {
XToolkit.awtUnlock();
}
}
sourceWindow = 0;
sourceWindowMask = 0;
sourceProtocolVersion = 0;
sourceActions = DnDConstants.ACTION_NONE;
sourceFormats = null;
trackSourceActions = false;
userAction = DnDConstants.ACTION_NONE;
sourceX = 0;
sourceY = 0;
targetXWindow = null;
}
public boolean isDragOverComponent() {
return targetXWindow != null;
}
public void adjustEventForForwarding(XClientMessageEvent xclient,
EmbedderRegistryEntry entry) {
/* Adjust the event to match the XDnD protocol version. */
int version = entry.getVersion();
if (xclient.get_message_type() == XDnDConstants.XA_XdndEnter.getAtom()) {
int min_version = sourceProtocolVersion < version ?
sourceProtocolVersion : version;
long data1 = min_version << XDnDConstants.XDND_PROTOCOL_SHIFT;
if (sourceFormats != null && sourceFormats.length > 3) {
data1 |= XDnDConstants.XDND_DATA_TYPES_BIT;
}
if (logger.isLoggable(PlatformLogger.Level.FINEST)) {
logger.finest(" "
+ " entryVersion=" + version
+ " sourceProtocolVersion=" +
sourceProtocolVersion
+ " sourceFormats.length=" +
(sourceFormats != null ? sourceFormats.length : 0));
}
xclient.set_data(1, data1);
}
}
private void notifyProtocolListener(XWindow xwindow, int x, int y,
int dropAction,
XClientMessageEvent xclient,
int eventID) {
long nativeCtxt = 0;
// Make a copy of the passed XClientMessageEvent structure, since
// the original structure can be freed before this
// SunDropTargetEvent is dispatched.
if (xclient != null) {
int size = new XClientMessageEvent(nativeCtxt).getSize();
nativeCtxt = unsafe.allocateMemory(size + 4 * Native.getLongSize());
unsafe.copyMemory(xclient.pData, nativeCtxt, size);
long data1 = sourceProtocolVersion << XDnDConstants.XDND_PROTOCOL_SHIFT;
if (sourceFormats != null && sourceFormats.length > 3) {
data1 |= XDnDConstants.XDND_DATA_TYPES_BIT;
}
// Append information from the latest XdndEnter event.
Native.putLong(nativeCtxt + size, data1);
Native.putLong(nativeCtxt + size + Native.getLongSize(),
sourceFormats.length > 0 ? sourceFormats[0] : 0);
Native.putLong(nativeCtxt + size + 2 * Native.getLongSize(),
sourceFormats.length > 1 ? sourceFormats[1] : 0);
Native.putLong(nativeCtxt + size + 3 * Native.getLongSize(),
sourceFormats.length > 2 ? sourceFormats[2] : 0);
}
getProtocolListener().handleDropTargetNotification(xwindow, x, y,
dropAction,
sourceActions,
sourceFormats,
nativeCtxt,
eventID);
}
/*
* The methods/fields defined below are executed/accessed only on
* the toolkit thread.
* The methods/fields defined below are executed/accessed only on the event
* dispatch thread.
*/
public boolean forwardEventToEmbedded(long embedded, long ctxt,
int eventID) {
if (logger.isLoggable(PlatformLogger.Level.FINEST)) {
logger.finest(" ctxt=" + ctxt +
" type=" + (ctxt != 0 ?
getMessageType(new
XClientMessageEvent(ctxt)) : 0) +
" prevCtxt=" + prevCtxt +
" prevType=" + (prevCtxt != 0 ?
getMessageType(new
XClientMessageEvent(prevCtxt)) : 0));
}
if ((ctxt == 0 ||
getMessageType(new XClientMessageEvent(ctxt)) == UNKNOWN_MESSAGE) &&
(prevCtxt == 0 ||
getMessageType(new XClientMessageEvent(prevCtxt)) == UNKNOWN_MESSAGE)) {
return false;
}
// The size of XClientMessageEvent structure.
int size = XClientMessageEvent.getSize();
if (ctxt != 0) {
XClientMessageEvent xclient = new XClientMessageEvent(ctxt);
if (!overXEmbedClient) {
long data1 = Native.getLong(ctxt + size);
long data2 = Native.getLong(ctxt + size + Native.getLongSize());
long data3 = Native.getLong(ctxt + size + 2 * Native.getLongSize());
long data4 = Native.getLong(ctxt + size + 3 * Native.getLongSize());
if (logger.isLoggable(PlatformLogger.Level.FINEST)) {
logger.finest(" 1 "
+ " embedded=" + embedded
+ " source=" + xclient.get_data(0)
+ " data1=" + data1
+ " data2=" + data2
+ " data3=" + data3
+ " data4=" + data4);
}
// Copy XdndTypeList from source to proxy.
if ((data1 & XDnDConstants.XDND_DATA_TYPES_BIT) != 0) {
WindowPropertyGetter wpg =
new WindowPropertyGetter(xclient.get_data(0),
XDnDConstants.XA_XdndTypeList,
0, 0xFFFF, false,
XAtom.XA_ATOM);
try {
wpg.execute(XErrorHandler.IgnoreBadWindowHandler.getInstance());
if (wpg.getActualType() == XAtom.XA_ATOM &&
wpg.getActualFormat() == 32) {
XToolkit.awtLock();
try {
XErrorHandlerUtil.WITH_XERROR_HANDLER(XErrorHandler.VerifyChangePropertyHandler.getInstance());
XDnDConstants.XA_XdndTypeList.setAtomData(xclient.get_window(),
XAtom.XA_ATOM,
wpg.getData(),
wpg.getNumberOfItems());
XErrorHandlerUtil.RESTORE_XERROR_HANDLER();
if ((XErrorHandlerUtil.saved_error != null) &&
(XErrorHandlerUtil.saved_error.get_error_code() != XConstants.Success)) {
if (logger.isLoggable(PlatformLogger.Level.WARNING)) {
logger.warning("Cannot set XdndTypeList on the proxy window");
}
}
} finally {
XToolkit.awtUnlock();
}
} else {
if (logger.isLoggable(PlatformLogger.Level.WARNING)) {
logger.warning("Cannot read XdndTypeList from the source window");
}
}
} finally {
wpg.dispose();
}
}
XDragSourceContextPeer.setProxyModeSourceWindow(xclient.get_data(0));
sendEnterMessageToToplevelImpl(embedded, xclient.get_window(),
data1, data2, data3, data4);
overXEmbedClient = true;
}
if (logger.isLoggable(PlatformLogger.Level.FINEST)) {
logger.finest(" 2 "
+ " embedded=" + embedded
+ " xclient=" + xclient);
}
/* Make a copy of the original event, since we are going to modify the
event while it still can be referenced from other Java events. */
{
XClientMessageEvent copy = new XClientMessageEvent();
unsafe.copyMemory(xclient.pData, copy.pData, copy.getSize());
copy.set_data(0, xclient.get_window());
forwardClientMessageToToplevel(embedded, copy);
}
}
if (eventID == MouseEvent.MOUSE_EXITED) {
if (overXEmbedClient) {
if (ctxt != 0 || prevCtxt != 0) {
// Last chance to send XdndLeave to the XEmbed client.
XClientMessageEvent xclient = ctxt != 0 ?
new XClientMessageEvent(ctxt) :
new XClientMessageEvent(prevCtxt);
sendLeaveMessageToToplevelImpl(embedded, xclient.get_window());
}
overXEmbedClient = false;
// We have to clear the proxy mode source window here,
// when the drag exits the XEmbedCanvasPeer.
// NOTE: at this point the XEmbed client still might have some
// drag notifications to process and it will send responses to
// us. With the proxy mode source window cleared we won't be
// able to forward these responses to the actual source. This is
// not a problem if the drag operation was initiated in this
// JVM. However, if it was initiated in another processes the
// responses will be lost. We bear with it for now, as it seems
// there is no other reliable point to clear.
XDragSourceContextPeer.setProxyModeSourceWindow(0);
}
}
if (eventID == MouseEvent.MOUSE_RELEASED) {
overXEmbedClient = false;
cleanup();
}
if (prevCtxt != 0) {
unsafe.freeMemory(prevCtxt);
prevCtxt = 0;
}
if (ctxt != 0 && overXEmbedClient) {
prevCtxt = unsafe.allocateMemory(size + 4 * Native.getLongSize());
unsafe.copyMemory(ctxt, prevCtxt, size + 4 * Native.getLongSize());
}
return true;
}
public boolean isXEmbedSupported() {
return true;
}
}
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