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xserver-multidpi/xfixes/cursor.c
Adam Jackson aa6651f83c xfixes: Remove the CursorCurrent array 
We're not wrapping all the ways a cursor can be destroyed, so this array
ends up with stale data. Rather than try harder to wrap more code paths,
just look up the cursor when we need it.

Signed-off-by: Adam Jackson <ajax@redhat.com>
2017-12-08 11:36:24 -05:00

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/*
* Copyright (c) 2006, Oracle and/or its affiliates. All rights reserved.
* Copyright 2010 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.
*
* Copyright © 2002 Keith Packard
*
* Permission to use, copy, modify, distribute, and sell this software and its
* documentation for any purpose is hereby granted without fee, provided that
* the above copyright notice appear in all copies and that both that
* copyright notice and this permission notice appear in supporting
* documentation, and that the name of Keith Packard not be used in
* advertising or publicity pertaining to distribution of the software without
* specific, written prior permission. Keith Packard makes no
* representations about the suitability of this software for any purpose. It
* is provided "as is" without express or implied warranty.
*
* KEITH PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
* EVENT SHALL KEITH PACKARD BE LIABLE FOR ANY SPECIAL, INDIRECT OR
* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
* PERFORMANCE OF THIS SOFTWARE.
*/
#ifdef HAVE_DIX_CONFIG_H
#include <dix-config.h>
#endif
#include "xfixesint.h"
#include "scrnintstr.h"
#include "cursorstr.h"
#include "dixevents.h"
#include "servermd.h"
#include "mipointer.h"
#include "inputstr.h"
#include "windowstr.h"
#include "xace.h"
#include "list.h"
#include "xibarriers.h"
static RESTYPE CursorClientType;
static RESTYPE CursorHideCountType;
static RESTYPE CursorWindowType;
static DevPrivateKeyRec CursorScreenPrivateKeyRec;
#define CursorScreenPrivateKey (&CursorScreenPrivateKeyRec)
static void deleteCursorHideCountsForScreen(ScreenPtr pScreen);
#define VERIFY_CURSOR(pCursor, cursor, client, access) \
do { \
int err; \
err = dixLookupResourceByType((void **) &pCursor, cursor, \
RT_CURSOR, client, access); \
if (err != Success) { \
client->errorValue = cursor; \
return err; \
} \
} while (0)
/*
* There is a global list of windows selecting for cursor events
*/
typedef struct _CursorEvent *CursorEventPtr;
typedef struct _CursorEvent {
CursorEventPtr next;
CARD32 eventMask;
ClientPtr pClient;
WindowPtr pWindow;
XID clientResource;
} CursorEventRec;
static CursorEventPtr cursorEvents;
/*
* Each screen has a list of clients which have requested
* that the cursor be hid, and the number of times each
* client has requested.
*/
typedef struct _CursorHideCountRec *CursorHideCountPtr;
typedef struct _CursorHideCountRec {
CursorHideCountPtr pNext;
ClientPtr pClient;
ScreenPtr pScreen;
int hideCount;
XID resource;
} CursorHideCountRec;
/*
* Wrap DisplayCursor to catch cursor change events
*/
typedef struct _CursorScreen {
DisplayCursorProcPtr DisplayCursor;
CloseScreenProcPtr CloseScreen;
CursorHideCountPtr pCursorHideCounts;
} CursorScreenRec, *CursorScreenPtr;
#define GetCursorScreen(s) ((CursorScreenPtr)dixLookupPrivate(&(s)->devPrivates, CursorScreenPrivateKey))
#define GetCursorScreenIfSet(s) GetCursorScreen(s)
#define SetCursorScreen(s,p) dixSetPrivate(&(s)->devPrivates, CursorScreenPrivateKey, p)
#define Wrap(as,s,elt,func) (((as)->elt = (s)->elt), (s)->elt = func)
#define Unwrap(as,s,elt,backup) (((backup) = (s)->elt), (s)->elt = (as)->elt)
/* The cursor doesn't show up until the first XDefineCursor() */
Bool CursorVisible = FALSE;
Bool EnableCursor = TRUE;
static CursorPtr
CursorForDevice(DeviceIntPtr pDev)
{
if (pDev && pDev->spriteInfo && pDev->spriteInfo->sprite)
return pDev->spriteInfo->sprite->current;
return NULL;
}
static CursorPtr
CursorForClient(ClientPtr client)
{
return CursorForDevice(PickPointer(client));
}
static Bool
CursorDisplayCursor(DeviceIntPtr pDev, ScreenPtr pScreen, CursorPtr pCursor)
{
CursorScreenPtr cs = GetCursorScreen(pScreen);
CursorPtr pOldCursor = CursorForDevice(pDev);
Bool ret;
DisplayCursorProcPtr backupProc;
Unwrap(cs, pScreen, DisplayCursor, backupProc);
CursorVisible = CursorVisible && EnableCursor;
if (cs->pCursorHideCounts != NULL || !CursorVisible) {
ret = (*pScreen->DisplayCursor) (pDev, pScreen, NullCursor);
}
else {
ret = (*pScreen->DisplayCursor) (pDev, pScreen, pCursor);
}
if (pCursor != pOldCursor) {
CursorEventPtr e;
UpdateCurrentTimeIf();
for (e = cursorEvents; e; e = e->next) {
if ((e->eventMask & XFixesDisplayCursorNotifyMask)) {
xXFixesCursorNotifyEvent ev = {
.type = XFixesEventBase + XFixesCursorNotify,
.subtype = XFixesDisplayCursorNotify,
.window = e->pWindow->drawable.id,
.cursorSerial = pCursor ? pCursor->serialNumber : 0,
.timestamp = currentTime.milliseconds,
.name = pCursor ? pCursor->name : None
};
WriteEventsToClient(e->pClient, 1, (xEvent *) &ev);
}
}
}
Wrap(cs, pScreen, DisplayCursor, backupProc);
return ret;
}
static Bool
CursorCloseScreen(ScreenPtr pScreen)
{
CursorScreenPtr cs = GetCursorScreen(pScreen);
Bool ret;
_X_UNUSED CloseScreenProcPtr close_proc;
_X_UNUSED DisplayCursorProcPtr display_proc;
Unwrap(cs, pScreen, CloseScreen, close_proc);
Unwrap(cs, pScreen, DisplayCursor, display_proc);
deleteCursorHideCountsForScreen(pScreen);
ret = (*pScreen->CloseScreen) (pScreen);
free(cs);
return ret;
}
#define CursorAllEvents (XFixesDisplayCursorNotifyMask)
static int
XFixesSelectCursorInput(ClientPtr pClient, WindowPtr pWindow, CARD32 eventMask)
{
CursorEventPtr *prev, e;
void *val;
int rc;
for (prev = &cursorEvents; (e = *prev); prev = &e->next) {
if (e->pClient == pClient && e->pWindow == pWindow) {
break;
}
}
if (!eventMask) {
if (e) {
FreeResource(e->clientResource, 0);
}
return Success;
}
if (!e) {
e = (CursorEventPtr) malloc(sizeof(CursorEventRec));
if (!e)
return BadAlloc;
e->next = 0;
e->pClient = pClient;
e->pWindow = pWindow;
e->clientResource = FakeClientID(pClient->index);
/*
* Add a resource hanging from the window to
* catch window destroy
*/
rc = dixLookupResourceByType(&val, pWindow->drawable.id,
CursorWindowType, serverClient,
DixGetAttrAccess);
if (rc != Success)
if (!AddResource(pWindow->drawable.id, CursorWindowType,
(void *) pWindow)) {
free(e);
return BadAlloc;
}
if (!AddResource(e->clientResource, CursorClientType, (void *) e))
return BadAlloc;
*prev = e;
}
e->eventMask = eventMask;
return Success;
}
int
ProcXFixesSelectCursorInput(ClientPtr client)
{
REQUEST(xXFixesSelectCursorInputReq);
WindowPtr pWin;
int rc;
REQUEST_SIZE_MATCH(xXFixesSelectCursorInputReq);
rc = dixLookupWindow(&pWin, stuff->window, client, DixGetAttrAccess);
if (rc != Success)
return rc;
if (stuff->eventMask & ~CursorAllEvents) {
client->errorValue = stuff->eventMask;
return BadValue;
}
return XFixesSelectCursorInput(client, pWin, stuff->eventMask);
}
static int
GetBit(unsigned char *line, int x)
{
unsigned char mask;
if (screenInfo.bitmapBitOrder == LSBFirst)
mask = (1 << (x & 7));
else
mask = (0x80 >> (x & 7));
/* XXX assumes byte order is host byte order */
line += (x >> 3);
if (*line & mask)
return 1;
return 0;
}
int _X_COLD
SProcXFixesSelectCursorInput(ClientPtr client)
{
REQUEST(xXFixesSelectCursorInputReq);
REQUEST_SIZE_MATCH(xXFixesSelectCursorInputReq);
swaps(&stuff->length);
swapl(&stuff->window);
swapl(&stuff->eventMask);
return (*ProcXFixesVector[stuff->xfixesReqType]) (client);
}
void _X_COLD
SXFixesCursorNotifyEvent(xXFixesCursorNotifyEvent * from,
xXFixesCursorNotifyEvent * to)
{
to->type = from->type;
cpswaps(from->sequenceNumber, to->sequenceNumber);
cpswapl(from->window, to->window);
cpswapl(from->cursorSerial, to->cursorSerial);
cpswapl(from->timestamp, to->timestamp);
cpswapl(from->name, to->name);
}
static void
CopyCursorToImage(CursorPtr pCursor, CARD32 *image)
{
int width = pCursor->bits->width;
int height = pCursor->bits->height;
int npixels = width * height;
if (pCursor->bits->argb)
memcpy(image, pCursor->bits->argb, npixels * sizeof(CARD32));
else
{
unsigned char *srcLine = pCursor->bits->source;
unsigned char *mskLine = pCursor->bits->mask;
int stride = BitmapBytePad(width);
int x, y;
CARD32 fg, bg;
fg = (0xff000000 |
((pCursor->foreRed & 0xff00) << 8) |
(pCursor->foreGreen & 0xff00) | (pCursor->foreBlue >> 8));
bg = (0xff000000 |
((pCursor->backRed & 0xff00) << 8) |
(pCursor->backGreen & 0xff00) | (pCursor->backBlue >> 8));
for (y = 0; y < height; y++) {
for (x = 0; x < width; x++) {
if (GetBit(mskLine, x)) {
if (GetBit(srcLine, x))
*image++ = fg;
else
*image++ = bg;
}
else
*image++ = 0;
}
srcLine += stride;
mskLine += stride;
}
}
}
int
ProcXFixesGetCursorImage(ClientPtr client)
{
/* REQUEST(xXFixesGetCursorImageReq); */
xXFixesGetCursorImageReply *rep;
CursorPtr pCursor;
CARD32 *image;
int npixels, width, height, rc, x, y;
REQUEST_SIZE_MATCH(xXFixesGetCursorImageReq);
pCursor = CursorForClient(client);
if (!pCursor)
return BadCursor;
rc = XaceHook(XACE_RESOURCE_ACCESS, client, pCursor->id, RT_CURSOR,
pCursor, RT_NONE, NULL, DixReadAccess);
if (rc != Success)
return rc;
GetSpritePosition(PickPointer(client), &x, &y);
width = pCursor->bits->width;
height = pCursor->bits->height;
npixels = width * height;
rep = calloc(sizeof(xXFixesGetCursorImageReply) + npixels * sizeof(CARD32),
1);
if (!rep)
return BadAlloc;
rep->type = X_Reply;
rep->sequenceNumber = client->sequence;
rep->length = npixels;
rep->width = width;
rep->height = height;
rep->x = x;
rep->y = y;
rep->xhot = pCursor->bits->xhot;
rep->yhot = pCursor->bits->yhot;
rep->cursorSerial = pCursor->serialNumber;
image = (CARD32 *) (rep + 1);
CopyCursorToImage(pCursor, image);
if (client->swapped) {
swaps(&rep->sequenceNumber);
swapl(&rep->length);
swaps(&rep->x);
swaps(&rep->y);
swaps(&rep->width);
swaps(&rep->height);
swaps(&rep->xhot);
swaps(&rep->yhot);
swapl(&rep->cursorSerial);
SwapLongs(image, npixels);
}
WriteToClient(client,
sizeof(xXFixesGetCursorImageReply) + (npixels << 2), rep);
free(rep);
return Success;
}
int _X_COLD
SProcXFixesGetCursorImage(ClientPtr client)
{
REQUEST(xXFixesGetCursorImageReq);
swaps(&stuff->length);
return (*ProcXFixesVector[stuff->xfixesReqType]) (client);
}
int
ProcXFixesSetCursorName(ClientPtr client)
{
CursorPtr pCursor;
char *tchar;
REQUEST(xXFixesSetCursorNameReq);
Atom atom;
REQUEST_FIXED_SIZE(xXFixesSetCursorNameReq, stuff->nbytes);
VERIFY_CURSOR(pCursor, stuff->cursor, client, DixSetAttrAccess);
tchar = (char *) &stuff[1];
atom = MakeAtom(tchar, stuff->nbytes, TRUE);
if (atom == BAD_RESOURCE)
return BadAlloc;
pCursor->name = atom;
return Success;
}
int _X_COLD
SProcXFixesSetCursorName(ClientPtr client)
{
REQUEST(xXFixesSetCursorNameReq);
swaps(&stuff->length);
REQUEST_AT_LEAST_SIZE(xXFixesSetCursorNameReq);
swapl(&stuff->cursor);
swaps(&stuff->nbytes);
return (*ProcXFixesVector[stuff->xfixesReqType]) (client);
}
int
ProcXFixesGetCursorName(ClientPtr client)
{
CursorPtr pCursor;
xXFixesGetCursorNameReply reply;
REQUEST(xXFixesGetCursorNameReq);
const char *str;
int len;
REQUEST_SIZE_MATCH(xXFixesGetCursorNameReq);
VERIFY_CURSOR(pCursor, stuff->cursor, client, DixGetAttrAccess);
if (pCursor->name)
str = NameForAtom(pCursor->name);
else
str = "";
len = strlen(str);
reply = (xXFixesGetCursorNameReply) {
.type = X_Reply,
.sequenceNumber = client->sequence,
.length = bytes_to_int32(len),
.atom = pCursor->name,
.nbytes = len
};
if (client->swapped) {
swaps(&reply.sequenceNumber);
swapl(&reply.length);
swapl(&reply.atom);
swaps(&reply.nbytes);
}
WriteReplyToClient(client, sizeof(xXFixesGetCursorNameReply), &reply);
WriteToClient(client, len, str);
return Success;
}
int _X_COLD
SProcXFixesGetCursorName(ClientPtr client)
{
REQUEST(xXFixesGetCursorNameReq);
swaps(&stuff->length);
REQUEST_SIZE_MATCH(xXFixesGetCursorNameReq);
swapl(&stuff->cursor);
return (*ProcXFixesVector[stuff->xfixesReqType]) (client);
}
int
ProcXFixesGetCursorImageAndName(ClientPtr client)
{
/* REQUEST(xXFixesGetCursorImageAndNameReq); */
xXFixesGetCursorImageAndNameReply *rep;
CursorPtr pCursor;
CARD32 *image;
int npixels;
const char *name;
int nbytes, nbytesRound;
int width, height;
int rc, x, y;
REQUEST_SIZE_MATCH(xXFixesGetCursorImageAndNameReq);
pCursor = CursorForClient(client);
if (!pCursor)
return BadCursor;
rc = XaceHook(XACE_RESOURCE_ACCESS, client, pCursor->id, RT_CURSOR,
pCursor, RT_NONE, NULL, DixReadAccess | DixGetAttrAccess);
if (rc != Success)
return rc;
GetSpritePosition(PickPointer(client), &x, &y);
width = pCursor->bits->width;
height = pCursor->bits->height;
npixels = width * height;
name = pCursor->name ? NameForAtom(pCursor->name) : "";
nbytes = strlen(name);
nbytesRound = pad_to_int32(nbytes);
rep = calloc(sizeof(xXFixesGetCursorImageAndNameReply) +
npixels * sizeof(CARD32) + nbytesRound, 1);
if (!rep)
return BadAlloc;
rep->type = X_Reply;
rep->sequenceNumber = client->sequence;
rep->length = npixels + bytes_to_int32(nbytesRound);
rep->width = width;
rep->height = height;
rep->x = x;
rep->y = y;
rep->xhot = pCursor->bits->xhot;
rep->yhot = pCursor->bits->yhot;
rep->cursorSerial = pCursor->serialNumber;
rep->cursorName = pCursor->name;
rep->nbytes = nbytes;
image = (CARD32 *) (rep + 1);
CopyCursorToImage(pCursor, image);
memcpy((image + npixels), name, nbytes);
if (client->swapped) {
swaps(&rep->sequenceNumber);
swapl(&rep->length);
swaps(&rep->x);
swaps(&rep->y);
swaps(&rep->width);
swaps(&rep->height);
swaps(&rep->xhot);
swaps(&rep->yhot);
swapl(&rep->cursorSerial);
swapl(&rep->cursorName);
swaps(&rep->nbytes);
SwapLongs(image, npixels);
}
WriteToClient(client, sizeof(xXFixesGetCursorImageAndNameReply) +
(npixels << 2) + nbytesRound, rep);
free(rep);
return Success;
}
int _X_COLD
SProcXFixesGetCursorImageAndName(ClientPtr client)
{
REQUEST(xXFixesGetCursorImageAndNameReq);
swaps(&stuff->length);
return (*ProcXFixesVector[stuff->xfixesReqType]) (client);
}
/*
* Find every cursor reference in the system, ask testCursor
* whether it should be replaced with a reference to pCursor.
*/
typedef Bool (*TestCursorFunc) (CursorPtr pOld, void *closure);
typedef struct {
RESTYPE type;
TestCursorFunc testCursor;
CursorPtr pNew;
void *closure;
} ReplaceCursorLookupRec, *ReplaceCursorLookupPtr;
static const RESTYPE CursorRestypes[] = {
RT_WINDOW, RT_PASSIVEGRAB, RT_CURSOR
};
static Bool
ReplaceCursorLookup(void *value, XID id, void *closure)
{
ReplaceCursorLookupPtr rcl = (ReplaceCursorLookupPtr) closure;
WindowPtr pWin;
GrabPtr pGrab;
CursorPtr pCursor = 0, *pCursorRef = 0;
XID cursor = 0;
switch (rcl->type) {
case RT_WINDOW:
pWin = (WindowPtr) value;
if (pWin->optional) {
pCursorRef = &pWin->optional->cursor;
pCursor = *pCursorRef;
}
break;
case RT_PASSIVEGRAB:
pGrab = (GrabPtr) value;
pCursorRef = &pGrab->cursor;
pCursor = *pCursorRef;
break;
case RT_CURSOR:
pCursorRef = 0;
pCursor = (CursorPtr) value;
cursor = id;
break;
}
if (pCursor && pCursor != rcl->pNew) {
if ((*rcl->testCursor) (pCursor, rcl->closure)) {
CursorPtr curs = RefCursor(rcl->pNew);
/* either redirect reference or update resource database */
if (pCursorRef)
*pCursorRef = curs;
else
ChangeResourceValue(id, RT_CURSOR, curs);
FreeCursor(pCursor, cursor);
}
}
return FALSE; /* keep walking */
}
static void
ReplaceCursor(CursorPtr pCursor, TestCursorFunc testCursor, void *closure)
{
int clientIndex;
int resIndex;
ReplaceCursorLookupRec rcl;
/*
* Cursors exist only in the resource database, windows and grabs.
* All of these are always pointed at by the resource database. Walk
* the whole thing looking for cursors
*/
rcl.testCursor = testCursor;
rcl.pNew = pCursor;
rcl.closure = closure;
/* for each client */
for (clientIndex = 0; clientIndex < currentMaxClients; clientIndex++) {
if (!clients[clientIndex])
continue;
for (resIndex = 0; resIndex < ARRAY_SIZE(CursorRestypes); resIndex++) {
rcl.type = CursorRestypes[resIndex];
/*
* This function walks the entire client resource database
*/
LookupClientResourceComplex(clients[clientIndex],
rcl.type,
ReplaceCursorLookup, (void *) &rcl);
}
}
/* this "knows" that WindowHasNewCursor doesn't depend on it's argument */
WindowHasNewCursor(screenInfo.screens[0]->root);
}
static Bool
TestForCursor(CursorPtr pCursor, void *closure)
{
return (pCursor == (CursorPtr) closure);
}
int
ProcXFixesChangeCursor(ClientPtr client)
{
CursorPtr pSource, pDestination;
REQUEST(xXFixesChangeCursorReq);
REQUEST_SIZE_MATCH(xXFixesChangeCursorReq);
VERIFY_CURSOR(pSource, stuff->source, client,
DixReadAccess | DixGetAttrAccess);
VERIFY_CURSOR(pDestination, stuff->destination, client,
DixWriteAccess | DixSetAttrAccess);
ReplaceCursor(pSource, TestForCursor, (void *) pDestination);
return Success;
}
int _X_COLD
SProcXFixesChangeCursor(ClientPtr client)
{
REQUEST(xXFixesChangeCursorReq);
swaps(&stuff->length);
REQUEST_SIZE_MATCH(xXFixesChangeCursorReq);
swapl(&stuff->source);
swapl(&stuff->destination);
return (*ProcXFixesVector[stuff->xfixesReqType]) (client);
}
static Bool
TestForCursorName(CursorPtr pCursor, void *closure)
{
Atom *pName = closure;
return pCursor->name == *pName;
}
int
ProcXFixesChangeCursorByName(ClientPtr client)
{
CursorPtr pSource;
Atom name;
char *tchar;
REQUEST(xXFixesChangeCursorByNameReq);
REQUEST_FIXED_SIZE(xXFixesChangeCursorByNameReq, stuff->nbytes);
VERIFY_CURSOR(pSource, stuff->source, client,
DixReadAccess | DixGetAttrAccess);
tchar = (char *) &stuff[1];
name = MakeAtom(tchar, stuff->nbytes, FALSE);
if (name)
ReplaceCursor(pSource, TestForCursorName, &name);
return Success;
}
int _X_COLD
SProcXFixesChangeCursorByName(ClientPtr client)
{
REQUEST(xXFixesChangeCursorByNameReq);
swaps(&stuff->length);
REQUEST_AT_LEAST_SIZE(xXFixesChangeCursorByNameReq);
swapl(&stuff->source);
swaps(&stuff->nbytes);
return (*ProcXFixesVector[stuff->xfixesReqType]) (client);
}
/*
* Routines for manipulating the per-screen hide counts list.
* This list indicates which clients have requested cursor hiding
* for that screen.
*/
/* Return the screen's hide-counts list element for the given client */
static CursorHideCountPtr
findCursorHideCount(ClientPtr pClient, ScreenPtr pScreen)
{
CursorScreenPtr cs = GetCursorScreen(pScreen);
CursorHideCountPtr pChc;
for (pChc = cs->pCursorHideCounts; pChc != NULL; pChc = pChc->pNext) {
if (pChc->pClient == pClient) {
return pChc;
}
}
return NULL;
}
static int
createCursorHideCount(ClientPtr pClient, ScreenPtr pScreen)
{
CursorScreenPtr cs = GetCursorScreen(pScreen);
CursorHideCountPtr pChc;
pChc = (CursorHideCountPtr) malloc(sizeof(CursorHideCountRec));
if (pChc == NULL) {
return BadAlloc;
}
pChc->pClient = pClient;
pChc->pScreen = pScreen;
pChc->hideCount = 1;
pChc->resource = FakeClientID(pClient->index);
pChc->pNext = cs->pCursorHideCounts;
cs->pCursorHideCounts = pChc;
/*
* Create a resource for this element so it can be deleted
* when the client goes away.
*/
if (!AddResource(pChc->resource, CursorHideCountType, (void *) pChc))
return BadAlloc;
return Success;
}
/*
* Delete the given hide-counts list element from its screen list.
*/
static void
deleteCursorHideCount(CursorHideCountPtr pChcToDel, ScreenPtr pScreen)
{
CursorScreenPtr cs = GetCursorScreen(pScreen);
CursorHideCountPtr pChc, pNext;
CursorHideCountPtr pChcLast = NULL;
pChc = cs->pCursorHideCounts;
while (pChc != NULL) {
pNext = pChc->pNext;
if (pChc == pChcToDel) {
free(pChc);
if (pChcLast == NULL) {
cs->pCursorHideCounts = pNext;
}
else {
pChcLast->pNext = pNext;
}
return;
}
pChcLast = pChc;
pChc = pNext;
}
}
/*
* Delete all the hide-counts list elements for this screen.
*/
static void
deleteCursorHideCountsForScreen(ScreenPtr pScreen)
{
CursorScreenPtr cs = GetCursorScreen(pScreen);
CursorHideCountPtr pChc, pTmp;
pChc = cs->pCursorHideCounts;
while (pChc != NULL) {
pTmp = pChc->pNext;
FreeResource(pChc->resource, 0);
pChc = pTmp;
}
cs->pCursorHideCounts = NULL;
}
int
ProcXFixesHideCursor(ClientPtr client)
{
WindowPtr pWin;
CursorHideCountPtr pChc;
REQUEST(xXFixesHideCursorReq);
int ret;
REQUEST_SIZE_MATCH(xXFixesHideCursorReq);
ret = dixLookupResourceByType((void **) &pWin, stuff->window, RT_WINDOW,
client, DixGetAttrAccess);
if (ret != Success) {
client->errorValue = stuff->window;
return ret;
}
/*
* Has client hidden the cursor before on this screen?
* If so, just increment the count.
*/
pChc = findCursorHideCount(client, pWin->drawable.pScreen);
if (pChc != NULL) {
pChc->hideCount++;
return Success;
}
/*
* This is the first time this client has hid the cursor
* for this screen.
*/
ret = XaceHook(XACE_SCREEN_ACCESS, client, pWin->drawable.pScreen,
DixHideAccess);
if (ret != Success)
return ret;
ret = createCursorHideCount(client, pWin->drawable.pScreen);
if (ret == Success) {
DeviceIntPtr dev;
for (dev = inputInfo.devices; dev; dev = dev->next) {
if (IsMaster(dev) && IsPointerDevice(dev))
CursorDisplayCursor(dev, pWin->drawable.pScreen,
CursorForDevice(dev));
}
}
return ret;
}
int _X_COLD
SProcXFixesHideCursor(ClientPtr client)
{
REQUEST(xXFixesHideCursorReq);
swaps(&stuff->length);
REQUEST_SIZE_MATCH(xXFixesHideCursorReq);
swapl(&stuff->window);
return (*ProcXFixesVector[stuff->xfixesReqType]) (client);
}
int
ProcXFixesShowCursor(ClientPtr client)
{
WindowPtr pWin;
CursorHideCountPtr pChc;
int rc;
REQUEST(xXFixesShowCursorReq);
REQUEST_SIZE_MATCH(xXFixesShowCursorReq);
rc = dixLookupResourceByType((void **) &pWin, stuff->window, RT_WINDOW,
client, DixGetAttrAccess);
if (rc != Success) {
client->errorValue = stuff->window;
return rc;
}
/*
* Has client hidden the cursor on this screen?
* If not, generate an error.
*/
pChc = findCursorHideCount(client, pWin->drawable.pScreen);
if (pChc == NULL) {
return BadMatch;
}
rc = XaceHook(XACE_SCREEN_ACCESS, client, pWin->drawable.pScreen,
DixShowAccess);
if (rc != Success)
return rc;
pChc->hideCount--;
if (pChc->hideCount <= 0) {
FreeResource(pChc->resource, 0);
}
return Success;
}
int _X_COLD
SProcXFixesShowCursor(ClientPtr client)
{
REQUEST(xXFixesShowCursorReq);
swaps(&stuff->length);
REQUEST_SIZE_MATCH(xXFixesShowCursorReq);
swapl(&stuff->window);
return (*ProcXFixesVector[stuff->xfixesReqType]) (client);
}
static int
CursorFreeClient(void *data, XID id)
{
CursorEventPtr old = (CursorEventPtr) data;
CursorEventPtr *prev, e;
for (prev = &cursorEvents; (e = *prev); prev = &e->next) {
if (e == old) {
*prev = e->next;
free(e);
break;
}
}
return 1;
}
static int
CursorFreeHideCount(void *data, XID id)
{
CursorHideCountPtr pChc = (CursorHideCountPtr) data;
ScreenPtr pScreen = pChc->pScreen;
DeviceIntPtr dev;
deleteCursorHideCount(pChc, pChc->pScreen);
for (dev = inputInfo.devices; dev; dev = dev->next) {
if (IsMaster(dev) && IsPointerDevice(dev))
CursorDisplayCursor(dev, pScreen, CursorForDevice(dev));
}
return 1;
}
static int
CursorFreeWindow(void *data, XID id)
{
WindowPtr pWindow = (WindowPtr) data;
CursorEventPtr e, next;
for (e = cursorEvents; e; e = next) {
next = e->next;
if (e->pWindow == pWindow) {
FreeResource(e->clientResource, 0);
}
}
return 1;
}
int
ProcXFixesCreatePointerBarrier(ClientPtr client)
{
REQUEST(xXFixesCreatePointerBarrierReq);
REQUEST_FIXED_SIZE(xXFixesCreatePointerBarrierReq, pad_to_int32(stuff->num_devices));
LEGAL_NEW_RESOURCE(stuff->barrier, client);
return XICreatePointerBarrier(client, stuff);
}
int _X_COLD
SProcXFixesCreatePointerBarrier(ClientPtr client)
{
REQUEST(xXFixesCreatePointerBarrierReq);
int i;
CARD16 *in_devices = (CARD16 *) &stuff[1];
REQUEST_AT_LEAST_SIZE(xXFixesCreatePointerBarrierReq);
swaps(&stuff->length);
swaps(&stuff->num_devices);
REQUEST_FIXED_SIZE(xXFixesCreatePointerBarrierReq, pad_to_int32(stuff->num_devices));
swapl(&stuff->barrier);
swapl(&stuff->window);
swaps(&stuff->x1);
swaps(&stuff->y1);
swaps(&stuff->x2);
swaps(&stuff->y2);
swapl(&stuff->directions);
for (i = 0; i < stuff->num_devices; i++) {
swaps(in_devices + i);
}
return ProcXFixesVector[stuff->xfixesReqType] (client);
}
int
ProcXFixesDestroyPointerBarrier(ClientPtr client)
{
REQUEST(xXFixesDestroyPointerBarrierReq);
REQUEST_SIZE_MATCH(xXFixesDestroyPointerBarrierReq);
return XIDestroyPointerBarrier(client, stuff);
}
int _X_COLD
SProcXFixesDestroyPointerBarrier(ClientPtr client)
{
REQUEST(xXFixesDestroyPointerBarrierReq);
swaps(&stuff->length);
REQUEST_SIZE_MATCH(xXFixesDestroyPointerBarrierReq);
swapl(&stuff->barrier);
return ProcXFixesVector[stuff->xfixesReqType] (client);
}
Bool
XFixesCursorInit(void)
{
int i;
if (party_like_its_1989)
CursorVisible = EnableCursor;
else
CursorVisible = FALSE;
if (!dixRegisterPrivateKey(&CursorScreenPrivateKeyRec, PRIVATE_SCREEN, 0))
return FALSE;
for (i = 0; i < screenInfo.numScreens; i++) {
ScreenPtr pScreen = screenInfo.screens[i];
CursorScreenPtr cs;
cs = (CursorScreenPtr) calloc(1, sizeof(CursorScreenRec));
if (!cs)
return FALSE;
Wrap(cs, pScreen, CloseScreen, CursorCloseScreen);
Wrap(cs, pScreen, DisplayCursor, CursorDisplayCursor);
cs->pCursorHideCounts = NULL;
SetCursorScreen(pScreen, cs);
}
CursorClientType = CreateNewResourceType(CursorFreeClient,
"XFixesCursorClient");
CursorHideCountType = CreateNewResourceType(CursorFreeHideCount,
"XFixesCursorHideCount");
CursorWindowType = CreateNewResourceType(CursorFreeWindow,
"XFixesCursorWindow");
return CursorClientType && CursorHideCountType && CursorWindowType;
}
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