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package sun.awt.X11;

import java.awt.datatransfer.Transferable;

import java.awt.dnd.DnDConstants;
import java.awt.dnd.InvalidDnDOperationException;

import java.util.Map;

import sun.misc.Unsafe;

XDragSourceProtocol implementation for Motif DnD protocol.
Since:1.5
/** * XDragSourceProtocol implementation for Motif DnD protocol. * * @since 1.5 */
class MotifDnDDragSourceProtocol extends XDragSourceProtocol implements XEventDispatcher { private static final Unsafe unsafe = XlibWrapper.unsafe; private long targetEnterServerTime = XConstants.CurrentTime; protected MotifDnDDragSourceProtocol(XDragSourceProtocolListener listener) { super(listener); XToolkit.addEventDispatcher(XWindow.getXAWTRootWindow().getWindow(), this); }
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</code>. */
static XDragSourceProtocol createInstance(XDragSourceProtocolListener listener) { return new MotifDnDDragSourceProtocol(listener); } public String getProtocolName() { return XDragAndDropProtocols.MotifDnD; } protected void initializeDragImpl(int actions, Transferable contents, Map formatMap, long[] formats) throws InvalidDnDOperationException, IllegalArgumentException, XException { long window = XDragSourceProtocol.getDragSourceWindow(); /* Write the Motif DnD initiator info on the root XWindow. */ try { int index = MotifDnDConstants.getIndexForTargetList(formats); MotifDnDConstants.writeDragInitiatorInfoStruct(window, index); } catch (XException xe) { cleanup(); throw xe; } catch (InvalidDnDOperationException idoe) { cleanup(); throw idoe; } if (!MotifDnDConstants.MotifDnDSelection.setOwner(contents, formatMap, formats, XConstants.CurrentTime)) { cleanup(); throw new InvalidDnDOperationException("Cannot acquire selection ownership"); } }
Processes the specified client message event.
@returnstrue if the event was successfully processed.
/** * Processes the specified client message event. * * @returns true if the event was successfully processed. */
public boolean processClientMessage(XClientMessageEvent xclient) { if (xclient.get_message_type() != MotifDnDConstants.XA_MOTIF_DRAG_AND_DROP_MESSAGE.getAtom()) { return false; } long data = xclient.get_data(); byte reason = (byte)(unsafe.getByte(data) & MotifDnDConstants.MOTIF_MESSAGE_REASON_MASK); byte origin = (byte)(unsafe.getByte(data) & MotifDnDConstants.MOTIF_MESSAGE_SENDER_MASK); byte byteOrder = unsafe.getByte(data + 1); boolean swapNeeded = byteOrder != MotifDnDConstants.getByteOrderByte(); int action = DnDConstants.ACTION_NONE; int x = 0; int y = 0; /* Only receiver messages should be handled. */ if (origin != MotifDnDConstants.MOTIF_MESSAGE_FROM_RECEIVER) { return false; } switch (reason) { case MotifDnDConstants.DROP_SITE_ENTER: case MotifDnDConstants.DROP_SITE_LEAVE: case MotifDnDConstants.DRAG_MOTION: case MotifDnDConstants.OPERATION_CHANGED: break; default: // Unknown reason. return false; } int t = unsafe.getInt(data + 4); if (swapNeeded) { t = MotifDnDConstants.Swapper.swap(t); } long time = t & 0xffffffffL; // with correction of (32-bit unsigned to 64-bit signed) implicit conversion. /* Discard events from the previous receiver. */ if (targetEnterServerTime == XConstants.CurrentTime || time < targetEnterServerTime) { return true; } if (reason != MotifDnDConstants.DROP_SITE_LEAVE) { short flags = unsafe.getShort(data + 2); if (swapNeeded) { flags = MotifDnDConstants.Swapper.swap(flags); } byte status = (byte)((flags & MotifDnDConstants.MOTIF_DND_STATUS_MASK) >> MotifDnDConstants.MOTIF_DND_STATUS_SHIFT); byte motif_action = (byte)((flags & MotifDnDConstants.MOTIF_DND_ACTION_MASK) >> MotifDnDConstants.MOTIF_DND_ACTION_SHIFT); if (status == MotifDnDConstants.MOTIF_VALID_DROP_SITE) { action = MotifDnDConstants.getJavaActionsForMotifActions(motif_action); } else { action = DnDConstants.ACTION_NONE; } short tx = unsafe.getShort(data + 8); short ty = unsafe.getShort(data + 10); if (swapNeeded) { tx = MotifDnDConstants.Swapper.swap(tx); ty = MotifDnDConstants.Swapper.swap(ty); } x = tx; y = ty; } getProtocolListener().handleDragReply(action, x, y); return true; } public TargetWindowInfo getTargetWindowInfo(long window) { assert XToolkit.isAWTLockHeldByCurrentThread(); WindowPropertyGetter wpg = new WindowPropertyGetter(window, MotifDnDConstants.XA_MOTIF_DRAG_RECEIVER_INFO, 0, 0xFFFF, false, XConstants.AnyPropertyType); try { int status = wpg.execute(XErrorHandler.IgnoreBadWindowHandler.getInstance()); /* * DragICCI.h: * * typedef struct _xmDragReceiverInfoStruct{ * BYTE byte_order; * BYTE protocol_version; * BYTE drag_protocol_style; * BYTE pad1; * CARD32 proxy_window B32; * CARD16 num_drop_sites B16; * CARD16 pad2 B16; * CARD32 heap_offset B32; * } xmDragReceiverInfoStruct; */ if (status == (int)XConstants.Success && wpg.getData() != 0 && wpg.getActualType() != 0 && wpg.getActualFormat() == 8 && wpg.getNumberOfItems() >= MotifDnDConstants.MOTIF_RECEIVER_INFO_SIZE) { long data = wpg.getData(); byte byteOrderByte = unsafe.getByte(data); byte dragProtocolStyle = unsafe.getByte(data + 2); switch (dragProtocolStyle) { case MotifDnDConstants.MOTIF_PREFER_PREREGISTER_STYLE : case MotifDnDConstants.MOTIF_PREFER_DYNAMIC_STYLE : case MotifDnDConstants.MOTIF_DYNAMIC_STYLE : case MotifDnDConstants.MOTIF_PREFER_RECEIVER_STYLE : int proxy = unsafe.getInt(data + 4); if (byteOrderByte != MotifDnDConstants.getByteOrderByte()) { proxy = MotifDnDConstants.Swapper.swap(proxy); } int protocolVersion = unsafe.getByte(data + 1); return new TargetWindowInfo(proxy, protocolVersion); default: // Unsupported protocol style. return null; } } else { return null; } } finally { wpg.dispose(); } } public void sendEnterMessage(long[] formats, int sourceAction, int sourceActions, long time) { assert XToolkit.isAWTLockHeldByCurrentThread(); assert getTargetWindow() != 0; assert formats != null; targetEnterServerTime = time; XClientMessageEvent msg = new XClientMessageEvent(); try { msg.set_type(XConstants.ClientMessage); msg.set_window(getTargetWindow()); msg.set_format(8); msg.set_message_type(MotifDnDConstants.XA_MOTIF_DRAG_AND_DROP_MESSAGE.getAtom()); long data = msg.get_data(); int flags = (MotifDnDConstants.getMotifActionsForJavaActions(sourceAction) << MotifDnDConstants.MOTIF_DND_ACTION_SHIFT) | (MotifDnDConstants.getMotifActionsForJavaActions(sourceActions) << MotifDnDConstants.MOTIF_DND_ACTIONS_SHIFT); unsafe.putByte(data, (byte)(MotifDnDConstants.TOP_LEVEL_ENTER | MotifDnDConstants.MOTIF_MESSAGE_FROM_INITIATOR)); unsafe.putByte(data + 1, MotifDnDConstants.getByteOrderByte()); unsafe.putShort(data + 2, (short)flags); unsafe.putInt(data + 4, (int)time); unsafe.putInt(data + 8, (int)XDragSourceProtocol.getDragSourceWindow()); unsafe.putInt(data + 12, (int)MotifDnDConstants.XA_MOTIF_ATOM_0.getAtom()); XlibWrapper.XSendEvent(XToolkit.getDisplay(), getTargetProxyWindow(), false, XConstants.NoEventMask, msg.pData); } finally { msg.dispose(); } } public void sendMoveMessage(int xRoot, int yRoot, int sourceAction, int sourceActions, long time) { assert XToolkit.isAWTLockHeldByCurrentThread(); assert getTargetWindow() != 0; XClientMessageEvent msg = new XClientMessageEvent(); try { msg.set_type(XConstants.ClientMessage); msg.set_window(getTargetWindow()); msg.set_format(8); msg.set_message_type(MotifDnDConstants.XA_MOTIF_DRAG_AND_DROP_MESSAGE.getAtom()); long data = msg.get_data(); int flags = (MotifDnDConstants.getMotifActionsForJavaActions(sourceAction) << MotifDnDConstants.MOTIF_DND_ACTION_SHIFT) | (MotifDnDConstants.getMotifActionsForJavaActions(sourceActions) << MotifDnDConstants.MOTIF_DND_ACTIONS_SHIFT); unsafe.putByte(data, (byte)(MotifDnDConstants.DRAG_MOTION | MotifDnDConstants.MOTIF_MESSAGE_FROM_INITIATOR)); unsafe.putByte(data + 1, MotifDnDConstants.getByteOrderByte()); unsafe.putShort(data + 2, (short)flags); unsafe.putInt(data + 4, (int)time); unsafe.putShort(data + 8, (short)xRoot); unsafe.putShort(data + 10, (short)yRoot); XlibWrapper.XSendEvent(XToolkit.getDisplay(), getTargetProxyWindow(), false, XConstants.NoEventMask, msg.pData); } finally { msg.dispose(); } } public void sendLeaveMessage(long time) { assert XToolkit.isAWTLockHeldByCurrentThread(); assert getTargetWindow() != 0; XClientMessageEvent msg = new XClientMessageEvent(); try { msg.set_type(XConstants.ClientMessage); msg.set_window(getTargetWindow()); msg.set_format(8); msg.set_message_type(MotifDnDConstants.XA_MOTIF_DRAG_AND_DROP_MESSAGE.getAtom()); long data = msg.get_data(); unsafe.putByte(data, (byte)(MotifDnDConstants.TOP_LEVEL_LEAVE | MotifDnDConstants.MOTIF_MESSAGE_FROM_INITIATOR)); unsafe.putByte(data + 1, MotifDnDConstants.getByteOrderByte()); unsafe.putShort(data + 2, (short)0); unsafe.putInt(data + 4, (int)time); unsafe.putInt(data + 8, (int)XDragSourceProtocol.getDragSourceWindow()); XlibWrapper.XSendEvent(XToolkit.getDisplay(), getTargetProxyWindow(), false, XConstants.NoEventMask, msg.pData); } finally { msg.dispose(); } } protected void sendDropMessage(int xRoot, int yRoot, int sourceAction, int sourceActions, long time) { assert XToolkit.isAWTLockHeldByCurrentThread(); assert getTargetWindow() != 0; /* * Motif drop sites expect TOP_LEVEL_LEAVE before DROP_START. */ sendLeaveMessage(time); XClientMessageEvent msg = new XClientMessageEvent(); try { msg.set_type(XConstants.ClientMessage); msg.set_window(getTargetWindow()); msg.set_format(8); msg.set_message_type(MotifDnDConstants.XA_MOTIF_DRAG_AND_DROP_MESSAGE.getAtom()); long data = msg.get_data(); int flags = (MotifDnDConstants.getMotifActionsForJavaActions(sourceAction) << MotifDnDConstants.MOTIF_DND_ACTION_SHIFT) | (MotifDnDConstants.getMotifActionsForJavaActions(sourceActions) << MotifDnDConstants.MOTIF_DND_ACTIONS_SHIFT); unsafe.putByte(data, (byte)(MotifDnDConstants.DROP_START | MotifDnDConstants.MOTIF_MESSAGE_FROM_INITIATOR)); unsafe.putByte(data + 1, MotifDnDConstants.getByteOrderByte()); unsafe.putShort(data + 2, (short)flags); unsafe.putInt(data + 4, (int)time); unsafe.putShort(data + 8, (short)xRoot); unsafe.putShort(data + 10, (short)yRoot); unsafe.putInt(data + 12, (int)MotifDnDConstants.XA_MOTIF_ATOM_0.getAtom()); unsafe.putInt(data + 16, (int)XDragSourceProtocol.getDragSourceWindow()); XlibWrapper.XSendEvent(XToolkit.getDisplay(), getTargetProxyWindow(), false, XConstants.NoEventMask, msg.pData); } finally { msg.dispose(); } } public boolean processProxyModeEvent(XClientMessageEvent xclient, long sourceWindow) { // Motif DnD for XEmbed is not implemented. return false; } public void cleanupTargetInfo() { super.cleanupTargetInfo(); targetEnterServerTime = XConstants.CurrentTime; } public void dispatchEvent(XEvent ev) { switch (ev.get_type()) { case XConstants.SelectionRequest: XSelectionRequestEvent xsre = ev.get_xselectionrequest(); long atom = xsre.get_selection(); if (atom == MotifDnDConstants.XA_MOTIF_ATOM_0.getAtom()) { long target = xsre.get_target(); if (target == MotifDnDConstants.XA_XmTRANSFER_SUCCESS.getAtom()) { getProtocolListener().handleDragFinished(true); } else if (target == MotifDnDConstants.XA_XmTRANSFER_FAILURE.getAtom()) { getProtocolListener().handleDragFinished(false); } } break; } } }