511 lines
14 KiB
C
511 lines
14 KiB
C
/*
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* Copyright 2007-2008 Peter Hutterer
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* Copyright 2009 Red Hat, Inc.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*
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* Author: Peter Hutterer, University of South Australia, NICTA
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*/
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/***********************************************************************
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*
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* Request change in the device hierarchy.
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*
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*/
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#ifdef HAVE_DIX_CONFIG_H
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#include <dix-config.h>
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#endif
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#include <X11/X.h> /* for inputstr.h */
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#include <X11/Xproto.h> /* Request macro */
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#include "inputstr.h" /* DeviceIntPtr */
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#include "windowstr.h" /* window structure */
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#include "scrnintstr.h" /* screen structure */
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#include <X11/extensions/XI.h>
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#include <X11/extensions/XI2proto.h>
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#include <X11/extensions/geproto.h>
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#include "extnsionst.h"
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#include "exevents.h"
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#include "exglobals.h"
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#include "geext.h"
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#include "xace.h"
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#include "xiquerydevice.h" /* for GetDeviceUse */
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#include "xkbsrv.h"
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#include "xichangehierarchy.h"
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#include "xibarriers.h"
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/**
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* Send the current state of the device hierarchy to all clients.
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*/
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void
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XISendDeviceHierarchyEvent(int flags[MAXDEVICES])
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{
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xXIHierarchyEvent *ev;
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xXIHierarchyInfo *info;
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DeviceIntRec dummyDev;
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DeviceIntPtr dev;
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int i;
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if (!flags)
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return;
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ev = calloc(1, sizeof(xXIHierarchyEvent) +
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MAXDEVICES * sizeof(xXIHierarchyInfo));
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if (!ev)
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return;
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ev->type = GenericEvent;
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ev->extension = IReqCode;
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ev->evtype = XI_HierarchyChanged;
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ev->time = GetTimeInMillis();
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ev->flags = 0;
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ev->num_info = inputInfo.numDevices;
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info = (xXIHierarchyInfo *) &ev[1];
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for (dev = inputInfo.devices; dev; dev = dev->next) {
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info->deviceid = dev->id;
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info->enabled = dev->enabled;
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info->use = GetDeviceUse(dev, &info->attachment);
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info->flags = flags[dev->id];
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ev->flags |= info->flags;
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info++;
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}
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for (dev = inputInfo.off_devices; dev; dev = dev->next) {
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info->deviceid = dev->id;
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info->enabled = dev->enabled;
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info->use = GetDeviceUse(dev, &info->attachment);
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info->flags = flags[dev->id];
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ev->flags |= info->flags;
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info++;
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}
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for (i = 0; i < MAXDEVICES; i++) {
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if (flags[i] & (XIMasterRemoved | XISlaveRemoved)) {
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info->deviceid = i;
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info->enabled = FALSE;
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info->flags = flags[i];
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info->use = 0;
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ev->flags |= info->flags;
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ev->num_info++;
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info++;
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}
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}
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ev->length = bytes_to_int32(ev->num_info * sizeof(xXIHierarchyInfo));
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memset(&dummyDev, 0, sizeof(dummyDev));
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dummyDev.id = XIAllDevices;
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dummyDev.type = SLAVE;
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SendEventToAllWindows(&dummyDev, (XI_HierarchyChangedMask >> 8),
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(xEvent *) ev, 1);
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free(ev);
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}
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/***********************************************************************
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*
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* This procedure allows a client to change the device hierarchy through
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* adding new master devices, removing them, etc.
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*
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*/
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int _X_COLD
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SProcXIChangeHierarchy(ClientPtr client)
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{
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REQUEST(xXIChangeHierarchyReq);
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swaps(&stuff->length);
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return (ProcXIChangeHierarchy(client));
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}
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static int
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add_master(ClientPtr client, xXIAddMasterInfo * c, int flags[MAXDEVICES])
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{
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DeviceIntPtr ptr, keybd, XTestptr, XTestkeybd;
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char *name;
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int rc;
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name = calloc(c->name_len + 1, sizeof(char));
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if (name == NULL) {
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rc = BadAlloc;
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goto unwind;
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}
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strncpy(name, (char *) &c[1], c->name_len);
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rc = AllocDevicePair(client, name, &ptr, &keybd,
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CorePointerProc, CoreKeyboardProc, TRUE);
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if (rc != Success)
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goto unwind;
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if (!c->send_core)
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ptr->coreEvents = keybd->coreEvents = FALSE;
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/* Allocate virtual slave devices for xtest events */
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rc = AllocXTestDevice(client, name, &XTestptr, &XTestkeybd, ptr, keybd);
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if (rc != Success) {
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DeleteInputDeviceRequest(ptr);
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DeleteInputDeviceRequest(keybd);
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goto unwind;
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}
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ActivateDevice(ptr, FALSE);
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ActivateDevice(keybd, FALSE);
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flags[ptr->id] |= XIMasterAdded;
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flags[keybd->id] |= XIMasterAdded;
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ActivateDevice(XTestptr, FALSE);
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ActivateDevice(XTestkeybd, FALSE);
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flags[XTestptr->id] |= XISlaveAdded;
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flags[XTestkeybd->id] |= XISlaveAdded;
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if (c->enable) {
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EnableDevice(ptr, FALSE);
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EnableDevice(keybd, FALSE);
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flags[ptr->id] |= XIDeviceEnabled;
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flags[keybd->id] |= XIDeviceEnabled;
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EnableDevice(XTestptr, FALSE);
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EnableDevice(XTestkeybd, FALSE);
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flags[XTestptr->id] |= XIDeviceEnabled;
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flags[XTestkeybd->id] |= XIDeviceEnabled;
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}
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/* Attach the XTest virtual devices to the newly
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created master device */
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AttachDevice(NULL, XTestptr, ptr);
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AttachDevice(NULL, XTestkeybd, keybd);
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flags[XTestptr->id] |= XISlaveAttached;
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flags[XTestkeybd->id] |= XISlaveAttached;
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for (int i = 0; i < currentMaxClients; i++)
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XIBarrierNewMasterDevice(clients[i], ptr->id);
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unwind:
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free(name);
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return rc;
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}
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static void
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disable_clientpointer(DeviceIntPtr dev)
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{
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int i;
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for (i = 0; i < currentMaxClients; i++) {
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ClientPtr client = clients[i];
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if (client && client->clientPtr == dev)
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client->clientPtr = NULL;
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}
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}
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static int
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remove_master(ClientPtr client, xXIRemoveMasterInfo * r, int flags[MAXDEVICES])
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{
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DeviceIntPtr ptr, keybd, XTestptr, XTestkeybd;
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int rc = Success;
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if (r->return_mode != XIAttachToMaster && r->return_mode != XIFloating)
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return BadValue;
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rc = dixLookupDevice(&ptr, r->deviceid, client, DixDestroyAccess);
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if (rc != Success)
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goto unwind;
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if (!IsMaster(ptr)) {
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client->errorValue = r->deviceid;
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rc = BadDevice;
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goto unwind;
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}
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/* XXX: For now, don't allow removal of VCP, VCK */
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if (ptr == inputInfo.pointer ||ptr == inputInfo.keyboard) {
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rc = BadDevice;
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goto unwind;
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}
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ptr = GetMaster(ptr, MASTER_POINTER);
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rc = dixLookupDevice(&ptr, ptr->id, client, DixDestroyAccess);
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if (rc != Success)
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goto unwind;
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keybd = GetMaster(ptr, MASTER_KEYBOARD);
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rc = dixLookupDevice(&keybd, keybd->id, client, DixDestroyAccess);
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if (rc != Success)
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goto unwind;
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XTestptr = GetXTestDevice(ptr);
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rc = dixLookupDevice(&XTestptr, XTestptr->id, client, DixDestroyAccess);
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if (rc != Success)
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goto unwind;
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XTestkeybd = GetXTestDevice(keybd);
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rc = dixLookupDevice(&XTestkeybd, XTestkeybd->id, client, DixDestroyAccess);
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if (rc != Success)
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goto unwind;
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disable_clientpointer(ptr);
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/* Disabling sends the devices floating, reattach them if
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* desired. */
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if (r->return_mode == XIAttachToMaster) {
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DeviceIntPtr attached, newptr, newkeybd;
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rc = dixLookupDevice(&newptr, r->return_pointer, client, DixAddAccess);
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if (rc != Success)
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goto unwind;
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if (!IsMaster(newptr)) {
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client->errorValue = r->return_pointer;
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rc = BadDevice;
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goto unwind;
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}
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rc = dixLookupDevice(&newkeybd, r->return_keyboard,
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client, DixAddAccess);
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if (rc != Success)
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goto unwind;
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if (!IsMaster(newkeybd)) {
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client->errorValue = r->return_keyboard;
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rc = BadDevice;
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goto unwind;
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}
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for (attached = inputInfo.devices; attached; attached = attached->next) {
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if (!IsMaster(attached)) {
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if (GetMaster(attached, MASTER_ATTACHED) == ptr) {
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AttachDevice(client, attached, newptr);
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flags[attached->id] |= XISlaveAttached;
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}
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if (GetMaster(attached, MASTER_ATTACHED) == keybd) {
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AttachDevice(client, attached, newkeybd);
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flags[attached->id] |= XISlaveAttached;
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}
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}
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}
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}
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for (int i = 0; i < currentMaxClients; i++)
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XIBarrierRemoveMasterDevice(clients[i], ptr->id);
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/* disable the remove the devices, XTest devices must be done first
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else the sprites they rely on will be destroyed */
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DisableDevice(XTestptr, FALSE);
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DisableDevice(XTestkeybd, FALSE);
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DisableDevice(keybd, FALSE);
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DisableDevice(ptr, FALSE);
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flags[XTestptr->id] |= XIDeviceDisabled | XISlaveDetached;
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flags[XTestkeybd->id] |= XIDeviceDisabled | XISlaveDetached;
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flags[keybd->id] |= XIDeviceDisabled;
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flags[ptr->id] |= XIDeviceDisabled;
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flags[XTestptr->id] |= XISlaveRemoved;
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flags[XTestkeybd->id] |= XISlaveRemoved;
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flags[keybd->id] |= XIMasterRemoved;
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flags[ptr->id] |= XIMasterRemoved;
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RemoveDevice(XTestptr, FALSE);
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RemoveDevice(XTestkeybd, FALSE);
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RemoveDevice(keybd, FALSE);
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RemoveDevice(ptr, FALSE);
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unwind:
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return rc;
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}
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static int
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detach_slave(ClientPtr client, xXIDetachSlaveInfo * c, int flags[MAXDEVICES])
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{
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DeviceIntPtr dev;
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int rc;
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rc = dixLookupDevice(&dev, c->deviceid, client, DixManageAccess);
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if (rc != Success)
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goto unwind;
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if (IsMaster(dev)) {
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client->errorValue = c->deviceid;
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rc = BadDevice;
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goto unwind;
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}
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/* Don't allow changes to XTest Devices, these are fixed */
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if (IsXTestDevice(dev, NULL)) {
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client->errorValue = c->deviceid;
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rc = BadDevice;
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goto unwind;
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}
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ReleaseButtonsAndKeys(dev);
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AttachDevice(client, dev, NULL);
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flags[dev->id] |= XISlaveDetached;
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unwind:
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return rc;
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}
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static int
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attach_slave(ClientPtr client, xXIAttachSlaveInfo * c, int flags[MAXDEVICES])
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{
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DeviceIntPtr dev;
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DeviceIntPtr newmaster;
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int rc;
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rc = dixLookupDevice(&dev, c->deviceid, client, DixManageAccess);
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if (rc != Success)
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goto unwind;
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if (IsMaster(dev)) {
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client->errorValue = c->deviceid;
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rc = BadDevice;
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goto unwind;
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}
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/* Don't allow changes to XTest Devices, these are fixed */
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if (IsXTestDevice(dev, NULL)) {
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client->errorValue = c->deviceid;
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rc = BadDevice;
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goto unwind;
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}
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rc = dixLookupDevice(&newmaster, c->new_master, client, DixAddAccess);
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if (rc != Success)
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goto unwind;
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if (!IsMaster(newmaster)) {
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client->errorValue = c->new_master;
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rc = BadDevice;
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goto unwind;
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}
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if (!((IsPointerDevice(newmaster) && IsPointerDevice(dev)) ||
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(IsKeyboardDevice(newmaster) && IsKeyboardDevice(dev)))) {
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rc = BadDevice;
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goto unwind;
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}
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ReleaseButtonsAndKeys(dev);
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AttachDevice(client, dev, newmaster);
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flags[dev->id] |= XISlaveAttached;
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unwind:
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return rc;
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}
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#define SWAPIF(cmd) if (client->swapped) { cmd; }
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int
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ProcXIChangeHierarchy(ClientPtr client)
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{
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xXIAnyHierarchyChangeInfo *any;
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size_t len; /* length of data remaining in request */
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int rc = Success;
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int flags[MAXDEVICES] = { 0 };
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REQUEST(xXIChangeHierarchyReq);
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REQUEST_AT_LEAST_SIZE(xXIChangeHierarchyReq);
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if (!stuff->num_changes)
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return rc;
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len = ((size_t)client->req_len << 2) - sizeof(xXIChangeHierarchyReq);
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any = (xXIAnyHierarchyChangeInfo *) &stuff[1];
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while (stuff->num_changes--) {
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if (len < sizeof(xXIAnyHierarchyChangeInfo)) {
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rc = BadLength;
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goto unwind;
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}
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SWAPIF(swaps(&any->type));
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SWAPIF(swaps(&any->length));
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if (len < ((size_t)any->length << 2))
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return BadLength;
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#define CHANGE_SIZE_MATCH(type) \
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do { \
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if ((len < sizeof(type)) || (any->length != (sizeof(type) >> 2))) { \
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rc = BadLength; \
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goto unwind; \
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} \
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} while(0)
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switch (any->type) {
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case XIAddMaster:
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{
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xXIAddMasterInfo *c = (xXIAddMasterInfo *) any;
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/* Variable length, due to appended name string */
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if (len < sizeof(xXIAddMasterInfo)) {
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rc = BadLength;
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goto unwind;
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}
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SWAPIF(swaps(&c->name_len));
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if (c->name_len > (len - sizeof(xXIAddMasterInfo))) {
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rc = BadLength;
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goto unwind;
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}
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rc = add_master(client, c, flags);
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if (rc != Success)
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goto unwind;
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}
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break;
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case XIRemoveMaster:
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{
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xXIRemoveMasterInfo *r = (xXIRemoveMasterInfo *) any;
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CHANGE_SIZE_MATCH(xXIRemoveMasterInfo);
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rc = remove_master(client, r, flags);
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if (rc != Success)
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goto unwind;
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}
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break;
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case XIDetachSlave:
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{
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xXIDetachSlaveInfo *c = (xXIDetachSlaveInfo *) any;
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CHANGE_SIZE_MATCH(xXIDetachSlaveInfo);
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rc = detach_slave(client, c, flags);
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if (rc != Success)
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goto unwind;
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}
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break;
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case XIAttachSlave:
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{
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xXIAttachSlaveInfo *c = (xXIAttachSlaveInfo *) any;
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CHANGE_SIZE_MATCH(xXIAttachSlaveInfo);
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rc = attach_slave(client, c, flags);
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if (rc != Success)
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goto unwind;
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}
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break;
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}
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len -= any->length * 4;
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any = (xXIAnyHierarchyChangeInfo *) ((char *) any + any->length * 4);
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}
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unwind:
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XISendDeviceHierarchyEvent(flags);
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return rc;
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}
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