grabdev.c (7133B)
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 * Extension function to grab 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 "windowstr.h" /* window structure */ 59 #include <X11/extensions/XI.h> 60 #include <X11/extensions/XIproto.h> 61 #include "exglobals.h" 62 #include "dixevents.h" /* GrabDevice */ 63 64 #include "grabdev.h" 65 66 extern XExtEventInfo EventInfo[]; 67 extern int ExtEventIndex; 68 69 /*********************************************************************** 70 * 71 * Swap the request if the requestor has a different byte order than us. 72 * 73 */ 74 75 int _X_COLD 76 SProcXGrabDevice(ClientPtr client) 77 { 78 REQUEST(xGrabDeviceReq); 79 swaps(&stuff->length); 80 REQUEST_AT_LEAST_SIZE(xGrabDeviceReq); 81 swapl(&stuff->grabWindow); 82 swapl(&stuff->time); 83 swaps(&stuff->event_count); 84 85 if (stuff->length != 86 bytes_to_int32(sizeof(xGrabDeviceReq)) + stuff->event_count) 87 return BadLength; 88 89 SwapLongs((CARD32 *) (&stuff[1]), stuff->event_count); 90 91 return (ProcXGrabDevice(client)); 92 } 93 94 /*********************************************************************** 95 * 96 * Grab an extension device. 97 * 98 */ 99 100 int 101 ProcXGrabDevice(ClientPtr client) 102 { 103 int rc; 104 xGrabDeviceReply rep; 105 DeviceIntPtr dev; 106 GrabMask mask; 107 struct tmask tmp[EMASKSIZE]; 108 109 REQUEST(xGrabDeviceReq); 110 REQUEST_AT_LEAST_SIZE(xGrabDeviceReq); 111 112 if (stuff->length != 113 bytes_to_int32(sizeof(xGrabDeviceReq)) + stuff->event_count) 114 return BadLength; 115 116 rep = (xGrabDeviceReply) { 117 .repType = X_Reply, 118 .RepType = X_GrabDevice, 119 .sequenceNumber = client->sequence, 120 .length = 0, 121 }; 122 123 rc = dixLookupDevice(&dev, stuff->deviceid, client, DixGrabAccess); 124 if (rc != Success) 125 return rc; 126 127 if ((rc = CreateMaskFromList(client, (XEventClass *) &stuff[1], 128 stuff->event_count, tmp, dev, 129 X_GrabDevice)) != Success) 130 return rc; 131 132 mask.xi = tmp[stuff->deviceid].mask; 133 134 rc = GrabDevice(client, dev, stuff->other_devices_mode, 135 stuff->this_device_mode, stuff->grabWindow, 136 stuff->ownerEvents, stuff->time, 137 &mask, XI, None, None, &rep.status); 138 139 if (rc != Success) 140 return rc; 141 142 WriteReplyToClient(client, sizeof(xGrabDeviceReply), &rep); 143 return Success; 144 } 145 146 /*********************************************************************** 147 * 148 * This procedure creates an event mask from a list of XEventClasses. 149 * 150 * Procedure is as follows: 151 * An XEventClass is (deviceid << 8 | eventtype). For each entry in the list, 152 * get the device. Then run through all available event indices (those are 153 * set when XI starts up) and binary OR's the device's mask to whatever the 154 * event mask for the given event type was. 155 * If an error occurs, it is sent to the client. Errors are generated if 156 * - if the device given in the event class is invalid 157 * - if the device in the class list is not the device given as parameter (no 158 * error if parameter is NULL) 159 * 160 * mask has to be size EMASKSIZE and pre-allocated. 161 * 162 * @param client The client to send the error to (if one occurs) 163 * @param list List of event classes as sent from the client. 164 * @param count Number of elements in list. 165 * @param mask Preallocated mask (size EMASKSIZE). 166 * @param dev The device we're creating masks for. 167 * @param req The request we're processing. Used to fill in error fields. 168 */ 169 170 int 171 CreateMaskFromList(ClientPtr client, XEventClass * list, int count, 172 struct tmask *mask, DeviceIntPtr dev, int req) 173 { 174 int rc, i, j; 175 int device; 176 DeviceIntPtr tdev; 177 178 memset(mask, 0, EMASKSIZE * sizeof(struct tmask)); 179 180 for (i = 0; i < count; i++, list++) { 181 device = *list >> 8; 182 if (device > 255) 183 return BadClass; 184 185 rc = dixLookupDevice(&tdev, device, client, DixUseAccess); 186 if (rc != BadDevice && rc != Success) 187 return rc; 188 if (rc == BadDevice || (dev != NULL && tdev != dev)) 189 return BadClass; 190 191 for (j = 0; j < ExtEventIndex; j++) 192 if (EventInfo[j].type == (*list & 0xff)) { 193 mask[device].mask |= EventInfo[j].mask; 194 mask[device].dev = (void *) tdev; 195 break; 196 } 197 } 198 return Success; 199 } 200 201 /*********************************************************************** 202 * 203 * This procedure writes the reply for the XGrabDevice function, 204 * if the client and server have a different byte ordering. 205 * 206 */ 207 208 void _X_COLD 209 SRepXGrabDevice(ClientPtr client, int size, xGrabDeviceReply * rep) 210 { 211 swaps(&rep->sequenceNumber); 212 swapl(&rep->length); 213 WriteToClient(client, size, rep); 214 }