xenocara/xserver/Xi/xiquerydevice.c

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/*
* 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.
*
* Authors: Peter Hutterer
*
*/
/**
* @file Protocol handling for the XIQueryDevice request/reply.
*/
#ifdef HAVE_DIX_CONFIG_H
#include <dix-config.h>
#endif
#include "inputstr.h"
#include <X11/X.h>
#include <X11/Xatom.h>
#include <X11/extensions/XI2proto.h>
#include "xkbstr.h"
#include "xkbsrv.h"
#include "xserver-properties.h"
#include "exevents.h"
#include "xace.h"
#include "xiquerydevice.h"
static Bool ShouldSkipDevice(ClientPtr client, int deviceid, DeviceIntPtr d);
static int
ListDeviceInfo(ClientPtr client, DeviceIntPtr dev, xXIDeviceInfo* info);
static int SizeDeviceInfo(DeviceIntPtr dev);
static void SwapDeviceInfo(DeviceIntPtr dev, xXIDeviceInfo* info);
int
SProcXIQueryDevice(ClientPtr client)
{
char n;
REQUEST(xXIQueryDeviceReq);
swaps(&stuff->length, n);
swaps(&stuff->deviceid, n);
return ProcXIQueryDevice(client);
}
int
ProcXIQueryDevice(ClientPtr client)
{
xXIQueryDeviceReply rep;
DeviceIntPtr dev = NULL;
int rc = Success;
int i = 0, len = 0;
char *info, *ptr;
Bool *skip = NULL;
REQUEST(xXIQueryDeviceReq);
REQUEST_SIZE_MATCH(xXIQueryDeviceReq);
if (stuff->deviceid != XIAllDevices && stuff->deviceid != XIAllMasterDevices)
{
rc = dixLookupDevice(&dev, stuff->deviceid, client, DixGetAttrAccess);
if (rc != Success)
{
client->errorValue = stuff->deviceid;
return rc;
}
len += SizeDeviceInfo(dev);
}
else
{
skip = calloc(sizeof(Bool), inputInfo.numDevices);
if (!skip)
return BadAlloc;
for (dev = inputInfo.devices; dev; dev = dev->next, i++)
{
skip[i] = ShouldSkipDevice(client, stuff->deviceid, dev);
if (!skip[i])
len += SizeDeviceInfo(dev);
}
for (dev = inputInfo.off_devices; dev; dev = dev->next, i++)
{
skip[i] = ShouldSkipDevice(client, stuff->deviceid, dev);
if (!skip[i])
len += SizeDeviceInfo(dev);
}
}
info = calloc(1, len);
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if (!info) {
free(skip);
return BadAlloc;
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}
memset(&rep, 0, sizeof(xXIQueryDeviceReply));
rep.repType = X_Reply;
rep.RepType = X_XIQueryDevice;
rep.sequenceNumber = client->sequence;
rep.length = len/4;
rep.num_devices = 0;
ptr = info;
if (dev)
{
len = ListDeviceInfo(client, dev, (xXIDeviceInfo*)info);
if (client->swapped)
SwapDeviceInfo(dev, (xXIDeviceInfo*)info);
info += len;
rep.num_devices = 1;
} else
{
i = 0;
for (dev = inputInfo.devices; dev; dev = dev->next, i++)
{
if (!skip[i])
{
len = ListDeviceInfo(client, dev, (xXIDeviceInfo*)info);
if (client->swapped)
SwapDeviceInfo(dev, (xXIDeviceInfo*)info);
info += len;
rep.num_devices++;
}
}
for (dev = inputInfo.off_devices; dev; dev = dev->next, i++)
{
if (!skip[i])
{
len = ListDeviceInfo(client, dev, (xXIDeviceInfo*)info);
if (client->swapped)
SwapDeviceInfo(dev, (xXIDeviceInfo*)info);
info += len;
rep.num_devices++;
}
}
}
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len = rep.length * 4;
WriteReplyToClient(client, sizeof(xXIQueryDeviceReply), &rep);
WriteToClient(client, len, ptr);
free(ptr);
free(skip);
return rc;
}
void
SRepXIQueryDevice(ClientPtr client, int size, xXIQueryDeviceReply *rep)
{
char n;
swaps(&rep->sequenceNumber, n);
swapl(&rep->length, n);
swaps(&rep->num_devices, n);
/* Device info is already swapped, see ProcXIQueryDevice */
WriteToClient(client, size, (char *)rep);
}
/**
* @return Whether the device should be included in the returned list.
*/
static Bool
ShouldSkipDevice(ClientPtr client, int deviceid, DeviceIntPtr dev)
{
/* if all devices are not being queried, only master devices are */
if (deviceid == XIAllDevices || IsMaster(dev))
{
int rc = XaceHook(XACE_DEVICE_ACCESS, client, dev, DixGetAttrAccess);
if (rc == Success)
return FALSE;
}
return TRUE;
}
/**
* @return The number of bytes needed to store this device's xXIDeviceInfo
* (and its classes).
*/
static int
SizeDeviceInfo(DeviceIntPtr dev)
{
int len = sizeof(xXIDeviceInfo);
/* 4-padded name */
len += pad_to_int32(strlen(dev->name));
return len + SizeDeviceClasses(dev);
}
/*
* @return The number of bytes needed to store this device's classes.
*/
int
SizeDeviceClasses(DeviceIntPtr dev)
{
int len = 0;
if (dev->button)
{
len += sizeof(xXIButtonInfo);
len += dev->button->numButtons * sizeof(Atom);
len += pad_to_int32(bits_to_bytes(dev->button->numButtons));
}
if (dev->key)
{
XkbDescPtr xkb = dev->key->xkbInfo->desc;
len += sizeof(xXIKeyInfo);
len += (xkb->max_key_code - xkb->min_key_code + 1) * sizeof(uint32_t);
}
if (dev->valuator)
len += sizeof(xXIValuatorInfo) * dev->valuator->numAxes;
return len;
}
/**
* Write button information into info.
* @return Number of bytes written into info.
*/
int
ListButtonInfo(DeviceIntPtr dev, xXIButtonInfo* info, Bool reportState)
{
unsigned char *bits;
int mask_len;
int i;
if (!dev || !dev->button)
return 0;
mask_len = bytes_to_int32(bits_to_bytes(dev->button->numButtons));
info->type = ButtonClass;
info->num_buttons = dev->button->numButtons;
info->length = bytes_to_int32(sizeof(xXIButtonInfo)) +
info->num_buttons + mask_len;
info->sourceid = dev->button->sourceid;
bits = (unsigned char*)&info[1];
memset(bits, 0, mask_len * 4);
if (reportState)
for (i = 0; i < dev->button->numButtons; i++)
if (BitIsOn(dev->button->down, i))
SetBit(bits, i);
bits += mask_len * 4;
memcpy(bits, dev->button->labels, dev->button->numButtons * sizeof(Atom));
return info->length * 4;
}
static void
SwapButtonInfo(DeviceIntPtr dev, xXIButtonInfo* info)
{
char n;
Atom *btn;
int i;
swaps(&info->type, n);
swaps(&info->length, n);
swaps(&info->sourceid, n);
for (i = 0, btn = (Atom*)&info[1]; i < info->num_buttons; i++, btn++)
swaps(btn, n);
swaps(&info->num_buttons, n);
}
/**
* Write key information into info.
* @return Number of bytes written into info.
*/
int
ListKeyInfo(DeviceIntPtr dev, xXIKeyInfo* info)
{
int i;
XkbDescPtr xkb = dev->key->xkbInfo->desc;
uint32_t *kc;
info->type = KeyClass;
info->num_keycodes = xkb->max_key_code - xkb->min_key_code + 1;
info->length = sizeof(xXIKeyInfo)/4 + info->num_keycodes;
info->sourceid = dev->key->sourceid;
kc = (uint32_t*)&info[1];
for (i = xkb->min_key_code; i <= xkb->max_key_code; i++, kc++)
*kc = i;
return info->length * 4;
}
static void
SwapKeyInfo(DeviceIntPtr dev, xXIKeyInfo* info)
{
char n;
uint32_t *key;
int i;
swaps(&info->type, n);
swaps(&info->length, n);
swaps(&info->sourceid, n);
for (i = 0, key = (uint32_t*)&info[1]; i < info->num_keycodes; i++, key++)
swapl(key, n);
swaps(&info->num_keycodes, n);
}
/**
* List axis information for the given axis.
*
* @return The number of bytes written into info.
*/
int
ListValuatorInfo(DeviceIntPtr dev, xXIValuatorInfo* info, int axisnumber,
Bool reportState)
{
ValuatorClassPtr v = dev->valuator;
info->type = ValuatorClass;
info->length = sizeof(xXIValuatorInfo)/4;
info->label = v->axes[axisnumber].label;
info->min.integral = v->axes[axisnumber].min_value;
info->min.frac = 0;
info->max.integral = v->axes[axisnumber].max_value;
info->max.frac = 0;
info->value.integral = (int)v->axisVal[axisnumber];
info->value.frac = (int)(v->axisVal[axisnumber] * (1 << 16) * (1 << 16));
info->resolution = v->axes[axisnumber].resolution;
info->number = axisnumber;
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info->mode = valuator_get_mode(dev, axisnumber);
info->sourceid = v->sourceid;
if (!reportState)
info->value = info->min;
return info->length * 4;
}
static void
SwapValuatorInfo(DeviceIntPtr dev, xXIValuatorInfo* info)
{
char n;
swaps(&info->type, n);
swaps(&info->length, n);
swapl(&info->label, n);
swapl(&info->min.integral, n);
swapl(&info->min.frac, n);
swapl(&info->max.integral, n);
swapl(&info->max.frac, n);
swaps(&info->number, n);
swaps(&info->sourceid, n);
}
int GetDeviceUse(DeviceIntPtr dev, uint16_t *attachment)
{
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DeviceIntPtr master = GetMaster(dev, MASTER_ATTACHED);
int use;
if (IsMaster(dev))
{
DeviceIntPtr paired = GetPairedDevice(dev);
use = IsPointerDevice(dev) ? XIMasterPointer : XIMasterKeyboard;
*attachment = (paired ? paired->id : 0);
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} else if (!IsFloating(dev))
{
use = IsPointerDevice(master) ? XISlavePointer : XISlaveKeyboard;
*attachment = master->id;
} else
use = XIFloatingSlave;
return use;
}
/**
* Write the info for device dev into the buffer pointed to by info.
*
* @return The number of bytes used.
*/
static int
ListDeviceInfo(ClientPtr client, DeviceIntPtr dev, xXIDeviceInfo* info)
{
char *any = (char*)&info[1];
int len = 0, total_len = 0;
info->deviceid = dev->id;
info->use = GetDeviceUse(dev, &info->attachment);
info->num_classes = 0;
info->name_len = strlen(dev->name);
info->enabled = dev->enabled;
total_len = sizeof(xXIDeviceInfo);
len = pad_to_int32(info->name_len);
memset(any, 0, len);
strncpy(any, dev->name, info->name_len);
any += len;
total_len += len;
total_len += ListDeviceClasses(client, dev, any, &info->num_classes);
return total_len;
}
/**
* Write the class info of the device into the memory pointed to by any, set
* nclasses to the number of classes in total and return the number of bytes
* written.
*/
int
ListDeviceClasses(ClientPtr client, DeviceIntPtr dev,
char *any, uint16_t *nclasses)
{
int total_len = 0;
int len;
int i;
int rc;
/* Check if the current device state should be suppressed */
rc = XaceHook(XACE_DEVICE_ACCESS, client, dev, DixReadAccess);
if (dev->button)
{
(*nclasses)++;
len = ListButtonInfo(dev, (xXIButtonInfo*)any, rc == Success);
any += len;
total_len += len;
}
if (dev->key)
{
(*nclasses)++;
len = ListKeyInfo(dev, (xXIKeyInfo*)any);
any += len;
total_len += len;
}
for (i = 0; dev->valuator && i < dev->valuator->numAxes; i++)
{
(*nclasses)++;
len = ListValuatorInfo(dev, (xXIValuatorInfo*)any, i, rc == Success);
any += len;
total_len += len;
}
return total_len;
}
static void
SwapDeviceInfo(DeviceIntPtr dev, xXIDeviceInfo* info)
{
char n;
char *any = (char*)&info[1];
int i;
/* Skip over name */
any += pad_to_int32(info->name_len);
for (i = 0; i < info->num_classes; i++)
{
int len = ((xXIAnyInfo*)any)->length;
switch(((xXIAnyInfo*)any)->type)
{
case XIButtonClass:
SwapButtonInfo(dev, (xXIButtonInfo*)any);
break;
case XIKeyClass:
SwapKeyInfo(dev, (xXIKeyInfo*)any);
break;
case XIValuatorClass:
SwapValuatorInfo(dev, (xXIValuatorInfo*)any);
break;
}
any += len * 4;
}
swaps(&info->deviceid, n);
swaps(&info->use, n);
swaps(&info->attachment, n);
swaps(&info->num_classes, n);
swaps(&info->name_len, n);
}