/*
 * Copyright (c) 2003, 2014, 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 jdk.internal.misc.Unsafe;

XDropTargetProtocol implementation for XDnD protocol.
Since:1.5
/** * 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 null.
/** * 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) & 0xFFFFFFFFL; } /* 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(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(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(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) & 0xFFFFFFFFL; 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(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.
/** * 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); } } @SuppressWarnings("static") 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, XClientMessageEvent.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; } }