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+/* $Xorg: chgptr.c,v 1.4 2001/02/09 02:04:33 xorgcvs Exp $ */
+
+/************************************************************
+
+Copyright 1989, 1998 The Open Group
+
+Permission to use, copy, modify, distribute, and sell this software and its
+documentation for any purpose is hereby granted without fee, provided that
+the above copyright notice appear in all copies and that both that
+copyright notice and this permission notice appear in supporting
+documentation.
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+Except as contained in this notice, the name of The Open Group shall not be
+used in advertising or otherwise to promote the sale, use or other dealings
+in this Software without prior written authorization from The Open Group.
+
+Copyright 1989 by Hewlett-Packard Company, Palo Alto, California.
+
+ All Rights Reserved
+
+Permission to use, copy, modify, and distribute this software and its
+documentation for any purpose and without fee is hereby granted,
+provided that the above copyright notice appear in all copies and that
+both that copyright notice and this permission notice appear in
+supporting documentation, and that the name of Hewlett-Packard not be
+used in advertising or publicity pertaining to distribution of the
+software without specific, written prior permission.
+
+HEWLETT-PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
+ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
+HEWLETT-PACKARD BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
+ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
+WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
+ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
+SOFTWARE.
+
+********************************************************/
+/* $XFree86: xc/programs/Xserver/Xi/chgptr.c,v 3.6 2001/08/23 14:56:19 alanh Exp $ */
+
+/***********************************************************************
+ *
+ * Extension function to change the pointer device.
+ *
+ */
+
+#define NEED_EVENTS
+#define NEED_REPLIES
+#ifdef HAVE_DIX_CONFIG_H
+#include <dix-config.h>
+#endif
+
+#include <X11/X.h> /* for inputstr.h */
+#include <X11/Xproto.h> /* Request macro */
+#include "inputstr.h" /* DeviceIntPtr */
+#include <X11/extensions/XI.h>
+#include <X11/extensions/XIproto.h>
+#include "XIstubs.h"
+#include "windowstr.h" /* window structure */
+#include "scrnintstr.h" /* screen structure */
+
+#include "extnsionst.h"
+#include "extinit.h" /* LookupDeviceIntRec */
+
+#include "dixevents.h"
+#include "exevents.h"
+#include "exglobals.h"
+
+#include "chgptr.h"
+
+/***********************************************************************
+ *
+ * This procedure is invoked to swap the request bytes if the server and
+ * client have a different byte order.
+ *
+ */
+
+int
+SProcXChangePointerDevice(client)
+ register ClientPtr client;
+ {
+ register char n;
+
+ REQUEST(xChangePointerDeviceReq);
+ swaps(&stuff->length, n);
+ REQUEST_SIZE_MATCH(xChangePointerDeviceReq);
+ return(ProcXChangePointerDevice(client));
+ }
+
+/***********************************************************************
+ *
+ * This procedure changes the device used as the X pointer.
+ *
+ */
+
+int
+ProcXChangePointerDevice (client)
+ register ClientPtr client;
+ {
+ DeviceIntPtr xptr = inputInfo.pointer;
+ DeviceIntPtr dev;
+ ValuatorClassPtr v;
+ xChangePointerDeviceReply rep;
+ changeDeviceNotify ev;
+
+ REQUEST(xChangePointerDeviceReq);
+ REQUEST_SIZE_MATCH(xChangePointerDeviceReq);
+
+ rep.repType = X_Reply;
+ rep.RepType = X_ChangePointerDevice;
+ rep.length = 0;
+ rep.sequenceNumber = client->sequence;
+
+ dev = LookupDeviceIntRec (stuff->deviceid);
+ if (dev == NULL)
+ {
+ rep.status = -1;
+ SendErrorToClient(client, IReqCode, X_ChangePointerDevice, 0,
+ BadDevice);
+ return Success;
+ }
+
+ v = dev->valuator;
+ if (v == NULL || v->numAxes < 2 ||
+ stuff->xaxis >= v->numAxes ||
+ stuff->yaxis >= v->numAxes)
+ {
+ rep.status = -1;
+ SendErrorToClient(client, IReqCode, X_ChangePointerDevice, 0, BadMatch);
+ return Success;
+ }
+
+ if (((dev->grab) && !SameClient(dev->grab, client)) ||
+ ((xptr->grab) && !SameClient(xptr->grab, client)))
+ rep.status = AlreadyGrabbed;
+ else if ((dev->sync.frozen &&
+ dev->sync.other && !SameClient(dev->sync.other, client)) ||
+ (xptr->sync.frozen &&
+ xptr->sync.other && !SameClient(xptr->sync.other, client)))
+ rep.status = GrabFrozen;
+ else
+ {
+ if (ChangePointerDevice (
+ xptr, dev, stuff->xaxis, stuff->yaxis) != Success)
+ {
+ SendErrorToClient(client, IReqCode, X_ChangePointerDevice, 0,
+ BadDevice);
+ return Success;
+ }
+ if (dev->focus)
+ DeleteFocusClassDeviceStruct(dev);
+ if (!dev->button)
+ InitButtonClassDeviceStruct (dev, 0, NULL);
+ if (!dev->ptrfeed)
+ InitPtrFeedbackClassDeviceStruct(dev, (PtrCtrlProcPtr)NoopDDA);
+ RegisterOtherDevice (xptr);
+ RegisterPointerDevice (dev);
+
+ ev.type = ChangeDeviceNotify;
+ ev.deviceid = stuff->deviceid;
+ ev.time = currentTime.milliseconds;
+ ev.request = NewPointer;
+
+ SendEventToAllWindows (dev, ChangeDeviceNotifyMask, (xEvent *)&ev, 1);
+ SendMappingNotify (MappingPointer, 0, 0, client);
+
+ rep.status = 0;
+ }
+
+ WriteReplyToClient (client, sizeof (xChangePointerDeviceReply),
+ &rep);
+ return Success;
+ }
+
+void
+DeleteFocusClassDeviceStruct(dev)
+ DeviceIntPtr dev;
+ {
+ xfree(dev->focus->trace);
+ xfree(dev->focus);
+ dev->focus = NULL;
+ }
+
+/***********************************************************************
+ *
+ * Send an event to interested clients in all windows on all screens.
+ *
+ */
+
+void
+SendEventToAllWindows (dev, mask, ev, count)
+ DeviceIntPtr dev;
+ Mask mask;
+ xEvent *ev;
+ int count;
+ {
+ int i;
+ WindowPtr pWin, p1;
+
+ for (i=0; i<screenInfo.numScreens; i++)
+ {
+ pWin = WindowTable[i];
+ (void)DeliverEventsToWindow(pWin, ev, count, mask, NullGrab, dev->id);
+ p1 = pWin->firstChild;
+ FindInterestedChildren (dev, p1, mask, ev, count);
+ }
+ }
+
+/***********************************************************************
+ *
+ * Walk through the window tree, finding all clients that want to know
+ * about the ChangeDeviceNotify Event.
+ *
+ */
+
+void
+FindInterestedChildren (dev, p1, mask, ev, count)
+ DeviceIntPtr dev;
+ WindowPtr p1;
+ Mask mask;
+ xEvent *ev;
+ int count;
+ {
+ WindowPtr p2;
+
+ while (p1)
+ {
+ p2 = p1->firstChild;
+ (void)DeliverEventsToWindow(p1, ev, count, mask, NullGrab, dev->id);
+ FindInterestedChildren (dev, p2, mask, ev, count);
+ p1 = p1->nextSib;
+ }
+ }
+
+/***********************************************************************
+ *
+ * This procedure writes the reply for the XChangePointerDevice
+ * function, if the client and server have a different byte ordering.
+ *
+ */
+
+void
+SRepXChangePointerDevice (client, size, rep)
+ ClientPtr client;
+ int size;
+ xChangePointerDeviceReply *rep;
+ {
+ register char n;
+
+ swaps(&rep->sequenceNumber, n);
+ swapl(&rep->length, n);
+ WriteToClient(client, size, (char *)rep);
+ }