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xserver/Xi/xiproperty.c

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/*
* Copyright © 2006 Keith Packard
* Copyright © 2008 Peter Hutterer
*
* 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 WAXIANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WAXIANTIES 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.
*
*/
/* This code is a modified version of randr/rrproperty.c */
#ifdef HAVE_DIX_CONFIG_H
#include <dix-config.h>
#endif
#include "dix.h"
#include "inputstr.h"
#include <X11/extensions/XI.h>
#include <X11/extensions/XIproto.h>
#include "exglobals.h"
#include "exevents.h"
#include "swaprep.h"
#include "xiproperty.h"
/**
* Properties used or alloced from inside the server.
*/
static struct dev_properties
{
Atom type;
char *name;
} dev_properties[] = {
{0, XI_PROP_ENABLED}
};
static long XIPropHandlerID = 1;
/**
* Return the type assigned to the specified atom or 0 if the atom isn't known
* to the DIX.
*/
_X_EXPORT Atom
XIGetKnownProperty(char *name)
{
int i;
for (i = 0; i < (sizeof(dev_properties)/sizeof(struct dev_properties)); i++)
{
if (strcmp(name, dev_properties[i].name) == 0)
return dev_properties[i].type;
}
return 0;
}
/**
* Init those properties that are allocated by the server and most likely used
* by the DIX or the DDX.
*/
void
XIInitKnownProperties(void)
{
int i;
for (i = 0; i < (sizeof(dev_properties)/sizeof(struct dev_properties)); i++)
{
dev_properties[i].type =
MakeAtom(dev_properties[i].name,
strlen(dev_properties[i].name),
TRUE);
}
}
/* Registers a new property handler on the given device and returns a unique
* identifier for this handler. This identifier is required to unregister the
* property handler again.
* @return The handler's identifier or 0 if an error occured.
*/
long
XIRegisterPropertyHandler(DeviceIntPtr dev,
Bool (*SetProperty) (DeviceIntPtr dev,
Atom property,
XIPropertyValuePtr prop),
Bool (*GetProperty) (DeviceIntPtr dev,
Atom property))
{
XIPropertyHandlerPtr new_handler;
new_handler = xcalloc(1, sizeof(XIPropertyHandler));
if (!new_handler)
return 0;
new_handler->id = XIPropHandlerID++;
new_handler->SetProperty = SetProperty;
new_handler->GetProperty = GetProperty;
new_handler->next = dev->properties.handlers;
dev->properties.handlers = new_handler;
return new_handler->id;
}
void
XIUnRegisterPropertyHandler(DeviceIntPtr dev, long id)
{
XIPropertyHandlerPtr curr, prev = NULL;
curr = dev->properties.handlers;
while(curr && curr->id != id)
{
prev = curr;
curr = curr->next;
}
if (!curr)
return;
if (!prev) /* first one */
dev->properties.handlers = curr->next;
else
prev->next = curr->next;
xfree(curr);
}
static void
XIInitDevicePropertyValue (XIPropertyValuePtr property_value)
{
property_value->type = None;
property_value->format = 0;
property_value->size = 0;
property_value->data = NULL;
}
static XIPropertyPtr
XICreateDeviceProperty (Atom property)
{
XIPropertyPtr prop;
prop = (XIPropertyPtr)xalloc(sizeof(XIPropertyRec));
if (!prop)
return NULL;
prop->next = NULL;
prop->propertyName = property;
prop->is_pending = FALSE;
prop->range = FALSE;
prop->fromClient = FALSE;
prop->immutable = FALSE;
prop->num_valid = 0;
prop->valid_values = NULL;
XIInitDevicePropertyValue (&prop->current);
XIInitDevicePropertyValue (&prop->pending);
return prop;
}
static void
XIDestroyDeviceProperty (XIPropertyPtr prop)
{
if (prop->valid_values)
xfree (prop->valid_values);
if (prop->current.data)
xfree(prop->current.data);
if (prop->pending.data)
xfree(prop->pending.data);
xfree(prop);
}
/* This function destroys all of the device's property-related stuff,
* including removing all device handlers.
* DO NOT CALL FROM THE DRIVER.
*/
void
XIDeleteAllDeviceProperties (DeviceIntPtr device)
{
XIPropertyPtr prop, next;
XIPropertyHandlerPtr curr_handler, next_handler;
devicePropertyNotifyEvent event;
for (prop = device->properties.properties; prop; prop = next)
{
next = prop->next;
event.type = GenericEvent;
event.extension = IReqCode;
event.evtype = XI_DevicePropertyNotify;
event.length = 0;
event.deviceid = device->id;
event.state = PropertyDelete;
event.atom = prop->propertyName;
event.time = currentTime.milliseconds;
SendEventToAllWindows(device, XI_DevicePropertyNotifyMask,
(xEvent*)&event, 1);
XIDestroyDeviceProperty(prop);
}
/* Now free all handlers */
curr_handler = device->properties.handlers;
while(curr_handler)
{
next_handler = curr_handler->next;
xfree(curr_handler);
curr_handler = next_handler;
}
}
int
XIDeleteDeviceProperty (DeviceIntPtr device, Atom property, Bool fromClient)
{
XIPropertyPtr prop, *prev;
devicePropertyNotifyEvent event;
for (prev = &device->properties.properties; (prop = *prev); prev = &(prop->next))
if (prop->propertyName == property)
break;
if (!prop->fromClient && fromClient)
return BadAtom;
if (prop)
{
*prev = prop->next;
event.type = GenericEvent;
event.extension = IReqCode;
event.length = 0;
event.evtype = XI_DevicePropertyNotify;
event.deviceid = device->id;
event.state = PropertyDelete;
event.atom = prop->propertyName;
event.time = currentTime.milliseconds;
SendEventToAllWindows(device, XI_DevicePropertyNotifyMask,
(xEvent*)&event, 1);
XIDestroyDeviceProperty (prop);
}
return Success;
}
int
XIChangeDeviceProperty (DeviceIntPtr dev, Atom property, Atom type,
int format, int mode, unsigned long len,
pointer value, Bool sendevent, Bool pending,
Bool fromClient)
{
XIPropertyPtr prop;
devicePropertyNotifyEvent event;
int size_in_bytes;
int total_size;
unsigned long total_len;
XIPropertyValuePtr prop_value;
XIPropertyValueRec new_value;
Bool add = FALSE;
size_in_bytes = format >> 3;
/* first see if property already exists */
prop = XIQueryDeviceProperty (dev, property);
if (!prop) /* just add to list */
{
prop = XICreateDeviceProperty (property);
if (!prop)
return(BadAlloc);
prop->fromClient = fromClient;
add = TRUE;
mode = PropModeReplace;
}
if (pending && prop->is_pending)
prop_value = &prop->pending;
else
prop_value = &prop->current;
/* To append or prepend to a property the request format and type
must match those of the already defined property. The
existing format and type are irrelevant when using the mode
"PropModeReplace" since they will be written over. */
if ((format != prop_value->format) && (mode != PropModeReplace))
return(BadMatch);
if ((prop_value->type != type) && (mode != PropModeReplace))
return(BadMatch);
new_value = *prop_value;
if (mode == PropModeReplace)
total_len = len;
else
total_len = prop_value->size + len;
if (mode == PropModeReplace || len > 0)
{
pointer new_data = NULL, old_data = NULL;
total_size = total_len * size_in_bytes;
new_value.data = (pointer)xalloc (total_size);
if (!new_value.data && total_size)
{
if (add)
XIDestroyDeviceProperty (prop);
return BadAlloc;
}
new_value.size = len;
new_value.type = type;
new_value.format = format;
switch (mode) {
case PropModeReplace:
new_data = new_value.data;
old_data = NULL;
break;
case PropModeAppend:
new_data = (pointer) (((char *) new_value.data) +
(prop_value->size * size_in_bytes));
old_data = new_value.data;
break;
case PropModePrepend:
new_data = new_value.data;
old_data = (pointer) (((char *) new_value.data) +
(prop_value->size * size_in_bytes));
break;
}
if (new_data)
memcpy ((char *) new_data, (char *) value, len * size_in_bytes);
if (old_data)
memcpy ((char *) old_data, (char *) prop_value->data,
prop_value->size * size_in_bytes);
/* We must set pendingProperties TRUE before we commit to the driver,
we're in a single thread after all
*/
if (pending && prop->is_pending)
dev->properties.pendingProperties = TRUE;
if (pending && dev->properties.handlers)
{
XIPropertyHandlerPtr handler = dev->properties.handlers;
while(handler)
{
if (handler->SetProperty &&
!handler->SetProperty(dev, prop->propertyName, &new_value))
{
if (new_value.data)
xfree (new_value.data);
return (BadValue);
}
handler = handler->next;
}
}
if (prop_value->data)
xfree (prop_value->data);
*prop_value = new_value;
}
else if (len == 0)
{
/* do nothing */
}
if (add)
{
prop->next = dev->properties.properties;
dev->properties.properties = prop;
}
if (sendevent)
{
event.type = GenericEvent;
event.extension = IReqCode;
event.length = 0;
event.evtype = XI_DevicePropertyNotify;
event.deviceid = dev->id;
event.state = PropertyNewValue;
event.atom = prop->propertyName;
event.time = currentTime.milliseconds;
SendEventToAllWindows(dev, XI_DevicePropertyNotifyMask,
(xEvent*)&event, 1);
}
return(Success);
}
XIPropertyPtr
XIQueryDeviceProperty (DeviceIntPtr dev, Atom property)
{
XIPropertyPtr prop;
for (prop = dev->properties.properties; prop; prop = prop->next)
if (prop->propertyName == property)
return prop;
return NULL;
}
XIPropertyValuePtr
XIGetDeviceProperty (DeviceIntPtr dev, Atom property, Bool pending)
{
XIPropertyPtr prop = XIQueryDeviceProperty (dev, property);
if (!prop)
return NULL;
if (pending && prop->is_pending)
return &prop->pending;
else {
/* If we can, try to update the property value first */
if (dev->properties.handlers)
{
XIPropertyHandlerPtr handler = dev->properties.handlers;
while(handler)
{
if (handler->GetProperty)
handler->GetProperty(dev, prop->propertyName);
handler = handler->next;
}
}
return &prop->current;
}
}
int
XIConfigureDeviceProperty (DeviceIntPtr dev, Atom property,
Bool pending, Bool range, Bool immutable,
int num_values, INT32 *values)
{
XIPropertyPtr prop = XIQueryDeviceProperty (dev, property);
Bool add = FALSE;
INT32 *new_values;
if (!prop)
{
prop = XICreateDeviceProperty (property);
if (!prop)
return(BadAlloc);
add = TRUE;
} else if (prop->immutable && !immutable)
return(BadAccess);
/*
* ranges must have even number of values
*/
if (range && (num_values & 1))
return BadMatch;
new_values = xalloc (num_values * sizeof (INT32));
if (!new_values && num_values)
return BadAlloc;
if (num_values)
memcpy (new_values, values, num_values * sizeof (INT32));
/*
* Property moving from pending to non-pending
* loses any pending values
*/
if (prop->is_pending && !pending)
{
if (prop->pending.data)
xfree (prop->pending.data);
XIInitDevicePropertyValue (&prop->pending);
}
prop->is_pending = pending;
prop->range = range;
prop->immutable = immutable;
prop->num_valid = num_values;
if (prop->valid_values)
xfree (prop->valid_values);
prop->valid_values = new_values;
if (add) {
prop->next = dev->properties.properties;
dev->properties.properties = prop;
}
return Success;
}
int
ProcXListDeviceProperties (ClientPtr client)
{
Atom *pAtoms = NULL, *temppAtoms;
xListDevicePropertiesReply rep;
int numProps = 0;
DeviceIntPtr dev;
XIPropertyPtr prop;
int rc = Success;
REQUEST(xListDevicePropertiesReq);
REQUEST_SIZE_MATCH(xListDevicePropertiesReq);
rc = dixLookupDevice (&dev, stuff->deviceid, client, DixReadAccess);
if (rc != Success)
return rc;
for (prop = dev->properties.properties; prop; prop = prop->next)
numProps++;
if (numProps)
if(!(pAtoms = (Atom *)xalloc(numProps * sizeof(Atom))))
return(BadAlloc);
rep.repType = X_Reply;
rep.RepType = X_ListDeviceProperties;
rep.length = (numProps * sizeof(Atom)) >> 2;
rep.sequenceNumber = client->sequence;
rep.nAtoms = numProps;
if (client->swapped)
{
int n;
swaps (&rep.sequenceNumber, n);
swapl (&rep.length, n);
swaps (&rep.nAtoms, n);
}
temppAtoms = pAtoms;
for (prop = dev->properties.properties; prop; prop = prop->next)
*temppAtoms++ = prop->propertyName;
WriteReplyToClient(client, sizeof(xListDevicePropertiesReply), &rep);
if (numProps)
{
client->pSwapReplyFunc = (ReplySwapPtr)Swap32Write;
WriteSwappedDataToClient(client, numProps * sizeof(Atom), pAtoms);
xfree(pAtoms);
}
return rc;
}
int
ProcXQueryDeviceProperty (ClientPtr client)
{
REQUEST(xQueryDevicePropertyReq);
xQueryDevicePropertyReply rep;
DeviceIntPtr dev;
XIPropertyPtr prop;
int rc;
REQUEST_SIZE_MATCH(xQueryDevicePropertyReq);
rc = dixLookupDevice (&dev, stuff->deviceid, client, DixReadAccess);
if (rc != Success)
return rc;
prop = XIQueryDeviceProperty (dev, stuff->property);
if (!prop)
return BadName;
rep.repType = X_Reply;
rep.length = prop->num_valid;
rep.sequenceNumber = client->sequence;
rep.pending = prop->is_pending;
rep.range = prop->range;
rep.immutable = prop->immutable;
rep.fromClient = prop->fromClient;
if (client->swapped)
{
int n;
swaps (&rep.sequenceNumber, n);
swapl (&rep.length, n);
}
WriteReplyToClient (client, sizeof (xQueryDevicePropertyReply), &rep);
if (prop->num_valid)
{
client->pSwapReplyFunc = (ReplySwapPtr)Swap32Write;
WriteSwappedDataToClient(client, prop->num_valid * sizeof(INT32),
prop->valid_values);
}
return(client->noClientException);
}
int
ProcXConfigureDeviceProperty (ClientPtr client)
{
REQUEST(xConfigureDevicePropertyReq);
DeviceIntPtr dev;
int num_valid;
int rc;
REQUEST_AT_LEAST_SIZE(xConfigureDevicePropertyReq);
rc = dixLookupDevice (&dev, stuff->deviceid, client, DixReadAccess);
if (rc != Success)
return rc;
num_valid = stuff->length - (sizeof (xConfigureDevicePropertyReq) >> 2);
return XIConfigureDeviceProperty (dev, stuff->property,
stuff->pending, stuff->range,
FALSE, num_valid,
(INT32 *) (stuff + 1));
}
int
ProcXChangeDeviceProperty (ClientPtr client)
{
REQUEST(xChangeDevicePropertyReq);
DeviceIntPtr dev;
char format, mode;
unsigned long len;
int sizeInBytes;
int totalSize;
int rc;
REQUEST_AT_LEAST_SIZE(xChangeDevicePropertyReq);
UpdateCurrentTime();
format = stuff->format;
mode = stuff->mode;
if ((mode != PropModeReplace) && (mode != PropModeAppend) &&
(mode != PropModePrepend))
{
client->errorValue = mode;
return BadValue;
}
if ((format != 8) && (format != 16) && (format != 32))
{
client->errorValue = format;
return BadValue;
}
len = stuff->nUnits;
if (len > ((0xffffffff - sizeof(xChangePropertyReq)) >> 2))
return BadLength;
sizeInBytes = format>>3;
totalSize = len * sizeInBytes;
REQUEST_FIXED_SIZE(xChangeDevicePropertyReq, totalSize);
rc = dixLookupDevice (&dev, stuff->deviceid, client, DixWriteAccess);
if (rc != Success)
return rc;
if (!ValidAtom(stuff->property))
{
client->errorValue = stuff->property;
return(BadAtom);
}
if (!ValidAtom(stuff->type))
{
client->errorValue = stuff->type;
return(BadAtom);
}
rc = XIChangeDeviceProperty(dev, stuff->property,
stuff->type, (int)format,
(int)mode, len, (pointer)&stuff[1], TRUE,
TRUE, TRUE);
return rc;
}
int
ProcXDeleteDeviceProperty (ClientPtr client)
{
REQUEST(xDeleteDevicePropertyReq);
DeviceIntPtr dev;
int rc;
REQUEST_SIZE_MATCH(xDeleteDevicePropertyReq);
UpdateCurrentTime();
rc = dixLookupDevice (&dev, stuff->deviceid, client, DixWriteAccess);
if (rc != Success)
return rc;
if (!ValidAtom(stuff->property))
{
client->errorValue = stuff->property;
return (BadAtom);
}
rc = XIDeleteDeviceProperty(dev, stuff->property, TRUE);
return rc;
}
int
ProcXGetDeviceProperty (ClientPtr client)
{
REQUEST(xGetDevicePropertyReq);
XIPropertyPtr prop, *prev;
XIPropertyValuePtr prop_value;
unsigned long n, len, ind;
DeviceIntPtr dev;
xGetDevicePropertyReply reply;
int rc;
REQUEST_SIZE_MATCH(xGetDevicePropertyReq);
if (stuff->delete)
UpdateCurrentTime();
rc = dixLookupDevice (&dev, stuff->deviceid, client,
stuff->delete ? DixWriteAccess :
DixReadAccess);
if (rc != Success)
return rc;
if (!ValidAtom(stuff->property))
{
client->errorValue = stuff->property;
return(BadAtom);
}
if ((stuff->delete != xTrue) && (stuff->delete != xFalse))
{
client->errorValue = stuff->delete;
return(BadValue);
}
if ((stuff->type != AnyPropertyType) && !ValidAtom(stuff->type))
{
client->errorValue = stuff->type;
return(BadAtom);
}
for (prev = &dev->properties.properties; (prop = *prev); prev = &prop->next)
if (prop->propertyName == stuff->property)
break;
reply.repType = X_Reply;
reply.RepType = X_GetDeviceProperty;
reply.sequenceNumber = client->sequence;
reply.deviceid = dev->id;
if (!prop)
{
reply.nItems = 0;
reply.length = 0;
reply.bytesAfter = 0;
reply.propertyType = None;
reply.format = 0;
WriteReplyToClient(client, sizeof(xGetDevicePropertyReply), &reply);
return(client->noClientException);
}
if (prop->immutable && stuff->delete)
return BadAccess;
prop_value = XIGetDeviceProperty(dev, stuff->property, stuff->pending);
if (!prop_value)
return BadAtom;
/* If the request type and actual type don't match. Return the
property information, but not the data. */
if (((stuff->type != prop_value->type) &&
(stuff->type != AnyPropertyType))
)
{
reply.bytesAfter = prop_value->size;
reply.format = prop_value->format;
reply.length = 0;
reply.nItems = 0;
reply.propertyType = prop_value->type;
WriteReplyToClient(client, sizeof(xGetDevicePropertyReply), &reply);
return(client->noClientException);
}
/*
* Return type, format, value to client
*/
n = (prop_value->format/8) * prop_value->size; /* size (bytes) of prop */
ind = stuff->longOffset << 2;
/* If longOffset is invalid such that it causes "len" to
be negative, it's a value error. */
if (n < ind)
{
client->errorValue = stuff->longOffset;
return BadValue;
}
len = min(n - ind, 4 * stuff->longLength);
reply.bytesAfter = n - (ind + len);
reply.format = prop_value->format;
reply.length = (len + 3) >> 2;
if (prop_value->format)
reply.nItems = len / (prop_value->format / 8);
else
reply.nItems = 0;
reply.propertyType = prop_value->type;
if (stuff->delete && (reply.bytesAfter == 0))
{
devicePropertyNotifyEvent event;
event.type = GenericEvent;
event.extension = IReqCode;
event.length = 0;
event.evtype = XI_DevicePropertyNotify;
event.deviceid = dev->id;
event.state = PropertyDelete;
event.atom = prop->propertyName;
event.time = currentTime.milliseconds;
SendEventToAllWindows(dev, XI_DevicePropertyNotifyMask,
(xEvent*)&event, 1);
}
WriteReplyToClient(client, sizeof(xGenericReply), &reply);
if (len)
{
switch (reply.format) {
case 32: client->pSwapReplyFunc = (ReplySwapPtr)CopySwap32Write; break;
case 16: client->pSwapReplyFunc = (ReplySwapPtr)CopySwap16Write; break;
default: client->pSwapReplyFunc = (ReplySwapPtr)WriteToClient; break;
}
WriteSwappedDataToClient(client, len,
(char *)prop_value->data + ind);
}
if (stuff->delete && (reply.bytesAfter == 0))
{ /* delete the Property */
*prev = prop->next;
XIDestroyDeviceProperty (prop);
}
return(client->noClientException);
}
int
SProcXListDeviceProperties (ClientPtr client)
{
char n;
REQUEST(xListDevicePropertiesReq);
swaps(&stuff->length, n);
REQUEST_SIZE_MATCH(xListDevicePropertiesReq);
return (ProcXListDeviceProperties(client));
}
int
SProcXQueryDeviceProperty (ClientPtr client)
{
char n;
REQUEST(xQueryDevicePropertyReq);
swaps(&stuff->length, n);
swapl(&stuff->property, n);
REQUEST_SIZE_MATCH(xQueryDevicePropertyReq);
return (ProcXQueryDeviceProperty(client));
}
int
SProcXConfigureDeviceProperty (ClientPtr client)
{
char n;
REQUEST(xConfigureDevicePropertyReq);
swaps(&stuff->length, n);
swapl(&stuff->property, n);
REQUEST_SIZE_MATCH(xConfigureDevicePropertyReq);
return (ProcXConfigureDeviceProperty(client));
}
int
SProcXChangeDeviceProperty (ClientPtr client)
{
char n;
REQUEST(xChangeDevicePropertyReq);
swaps(&stuff->length, n);
swapl(&stuff->property, n);
swapl(&stuff->type, n);
swapl(&stuff->nUnits, n);
REQUEST_SIZE_MATCH(xChangeDevicePropertyReq);
return (ProcXChangeDeviceProperty(client));
}
int
SProcXDeleteDeviceProperty (ClientPtr client)
{
char n;
REQUEST(xDeleteDevicePropertyReq);
swaps(&stuff->length, n);
swapl(&stuff->property, n);
REQUEST_SIZE_MATCH(xDeleteDevicePropertyReq);
return (ProcXDeleteDeviceProperty(client));
}
int
SProcXGetDeviceProperty (ClientPtr client)
{
char n;
REQUEST(xGetDevicePropertyReq);
swaps(&stuff->length, n);
swapl(&stuff->property, n);
swapl(&stuff->type, n);
swapl(&stuff->longOffset, n);
swapl(&stuff->longLength, n);
REQUEST_SIZE_MATCH(xGetDevicePropertyReq);
return (ProcXGetDeviceProperty(client));
}
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