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xwayland/Xi/xichangehierarchy.c

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