Xi/gtmotion.c

   1 /************************************************************
   2
   3 Copyright 1989, 1998  The Open Group
   4
   5 Permission to use, copy, modify, distribute, and sell this software and its
   6 documentation for any purpose is hereby granted without fee, provided that
   7 the above copyright notice appear in all copies and that both that
   8 copyright notice and this permission notice appear in supporting
   9 documentation.
  10
  11 The above copyright notice and this permission notice shall be included in
  12 all copies or substantial portions of the Software.
  13
  14 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  15 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  16 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
  17 OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
  18 AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  19 CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  20
  21 Except as contained in this notice, the name of The Open Group shall not be
  22 used in advertising or otherwise to promote the sale, use or other dealings
  23 in this Software without prior written authorization from The Open Group.
  24
  25 Copyright 1989 by Hewlett-Packard Company, Palo Alto, California.
  26
  27                         All Rights Reserved
  28
  29 Permission to use, copy, modify, and distribute this software and its
  30 documentation for any purpose and without fee is hereby granted,
  31 provided that the above copyright notice appear in all copies and that
  32 both that copyright notice and this permission notice appear in
  33 supporting documentation, and that the name of Hewlett-Packard not be
  34 used in advertising or publicity pertaining to distribution of the
  35 software without specific, written prior permission.
  36
  37 HEWLETT-PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
  38 ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
  39 HEWLETT-PACKARD BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
  40 ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
  41 WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
  42 ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
  43 SOFTWARE.
  44
  45 ********************************************************/
  46
  47 /***********************************************************************
  48  *
  49  * Request to get the motion history from an extension device.
  50  *
  51  */
  52
  53 #ifdef HAVE_DIX_CONFIG_H
  54 #include <dix-config.h>
  55 #endif
  56
  57 #include "inputstr.h"           /* DeviceIntPtr      */
  58 #include <X11/extensions/XI.h>
  59 #include <X11/extensions/XIproto.h>
  60 #include "exevents.h"
  61 #include "exglobals.h"
  62
  63 #include "gtmotion.h"
  64
  65 /***********************************************************************
  66  *
  67  * Swap the request if server and client have different byte ordering.
  68  *
  69  */
  70
  71 int
  72 SProcXGetDeviceMotionEvents(ClientPtr client)
  73 {
  74     REQUEST(xGetDeviceMotionEventsReq);
  75     swaps(&stuff->length);
  76     REQUEST_SIZE_MATCH(xGetDeviceMotionEventsReq);
  77     swapl(&stuff->start);
  78     swapl(&stuff->stop);
  79     return (ProcXGetDeviceMotionEvents(client));
  80 }
  81
  82 /****************************************************************************
  83  *
  84  * Get the motion history for an extension pointer devices.
  85  *
  86  */
  87
  88 int
  89 ProcXGetDeviceMotionEvents(ClientPtr client)
  90 {
  91     INT32 *coords = NULL, *bufptr;
  92     xGetDeviceMotionEventsReply rep;
  93     unsigned long i;
  94     int rc, num_events, axes, size = 0;
  95     unsigned long nEvents;
  96     DeviceIntPtr dev;
  97     TimeStamp start, stop;
  98     int length = 0;
  99     ValuatorClassPtr v;
 100
 101     REQUEST(xGetDeviceMotionEventsReq);
 102
 103     REQUEST_SIZE_MATCH(xGetDeviceMotionEventsReq);
 104     rc = dixLookupDevice(&dev, stuff->deviceid, client, DixReadAccess);
 105     if (rc != Success)
 106         return rc;
 107     v = dev->valuator;
 108     if (v == NULL || v->numAxes == 0)
 109         return BadMatch;
 110     if (dev->valuator->motionHintWindow)
 111         MaybeStopDeviceHint(dev, client);
 112     axes = v->numAxes;
 113     rep = (xGetDeviceMotionEventsReply) {
 114         .repType = X_Reply,
 115         .RepType = X_GetDeviceMotionEvents,
 116         .sequenceNumber = client->sequence,
 117         .length = 0,
 118         .nEvents = 0,
 119         .axes = axes,
 120         .mode = Absolute        /* XXX we don't do relative at the moment */
 121     };
 122     start = ClientTimeToServerTime(stuff->start);
 123     stop = ClientTimeToServerTime(stuff->stop);
 124     if (CompareTimeStamps(start, stop) == LATER ||
 125         CompareTimeStamps(start, currentTime) == LATER) {
 126         WriteReplyToClient(client, sizeof(xGetDeviceMotionEventsReply), &rep);
 127         return Success;
 128     }
 129     if (CompareTimeStamps(stop, currentTime) == LATER)
 130         stop = currentTime;
 131     num_events = v->numMotionEvents;
 132     if (num_events) {
 133         size = sizeof(Time) + (axes * sizeof(INT32));
 134         rep.nEvents = GetMotionHistory(dev, (xTimecoord **) &coords,   /* XXX */
 135                                        start.milliseconds, stop.milliseconds,
 136                                        (ScreenPtr) NULL, FALSE);
 137     }
 138     if (rep.nEvents > 0) {
 139         length = bytes_to_int32(rep.nEvents * size);
 140         rep.length = length;
 141     }
 142     nEvents = rep.nEvents;
 143     WriteReplyToClient(client, sizeof(xGetDeviceMotionEventsReply), &rep);
 144     if (nEvents) {
 145         if (client->swapped) {
 146             bufptr = coords;
 147             for (i = 0; i < nEvents * (axes + 1); i++) {
 148                 swapl(bufptr);
 149                 bufptr++;
 150             }
 151         }
 152         WriteToClient(client, length * 4, coords);
 153     }
 154     free(coords);
 155     return Success;
 156 }
 157
 158 /***********************************************************************
 159  *
 160  * This procedure writes the reply for the XGetDeviceMotionEvents function,
 161  * if the client and server have a different byte ordering.
 162  *
 163  */
 164
 165 void
 166 SRepXGetDeviceMotionEvents(ClientPtr client, int size,
 167                            xGetDeviceMotionEventsReply * rep)
 168 {
 169     swaps(&rep->sequenceNumber);
 170     swapl(&rep->length);
 171     swapl(&rep->nEvents);
 172     WriteToClient(client, size, rep);
 173 }