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xserver-multidpi/xfixes/cursor.c
Peter Hutterer 664ac92d8b xfixes: backup the DisplayCursor/CloseScreen proc before restoring it (#23034) 
The screen's DisplayCursor func is wrapped as
AnimCurDisplayCursor -> CursorDisplayCursor -> miPointerDisplayCursor.

Calling CursorDisplayCursor while an animated cursor was currently displayed
would remove AnimCurDisplayCursor from the wrap stack. Thus, the next call
to ChangeToCursor wouldn't update the animated cursor state. The block
handler for animated cursors would then continuously overwrite the actual
cursor, leaving an animated cursor everywhere on the screen.

X.Org Bug 23034 <http://bugs.freedesktop.org/show_bug.cgi?id=23034>
2009-08-03 10:11:48 +10:00

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/*
* Copyright © 2006 Sun Microsystems, Inc. All rights reserved.
*
* 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, and/or sell copies of the Software, and to permit persons
* to whom the Software is furnished to do so, provided that the above
* copyright notice(s) and this permission notice appear in all copies of
* the Software and that both the above copyright notice(s) and this
* permission notice appear in supporting documentation.
*
* 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
* OF THIRD PARTY RIGHTS. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
* HOLDERS INCLUDED IN THIS NOTICE BE LIABLE FOR ANY CLAIM, OR 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.
*
* Except as contained in this notice, the name of a copyright holder
* shall not be used in advertising or otherwise to promote the sale, use
* or other dealings in this Software without prior written authorization
* of the copyright holder.
*
* 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 "inputstr.h"
#include "windowstr.h"
#include "xace.h"
static RESTYPE CursorClientType;
static RESTYPE CursorHideCountType;
static RESTYPE CursorWindowType;
static CursorPtr CursorCurrent[MAXDEVICES];
static CursorPtr pInvisibleCursor = NULL;
static int CursorScreenPrivateKeyIndex;
static DevPrivateKey CursorScreenPrivateKey = &CursorScreenPrivateKeyIndex;
static void deleteCursorHideCountsForScreen (ScreenPtr pScreen);
#define VERIFY_CURSOR(pCursor, cursor, client, access) \
do { \
int err; \
err = dixLookupResourceByType((pointer *) &pCursor, cursor, \
RT_CURSOR, client, access); \
if (err == BadValue) { \
client->errorValue = cursor; \
return BadCursor; \
} else 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() */
static Bool CursorVisible = FALSE;
Bool EnableCursor = TRUE;
static Bool
CursorDisplayCursor (DeviceIntPtr pDev,
ScreenPtr pScreen,
CursorPtr pCursor)
{
CursorScreenPtr cs = GetCursorScreen(pScreen);
Bool ret;
DisplayCursorProcPtr backupProc;
Unwrap (cs, pScreen, DisplayCursor, backupProc);
/*
* Have to check ConnectionInfo to distinguish client requests from
* initial root window setup. Not a great way to do it, I admit.
*/
if (ConnectionInfo)
CursorVisible = EnableCursor;
if (cs->pCursorHideCounts != NULL || !CursorVisible) {
ret = ((*pScreen->RealizeCursor)(pDev, pScreen, pInvisibleCursor) &&
(*pScreen->DisplayCursor) (pDev, pScreen, pInvisibleCursor));
} else {
ret = (*pScreen->DisplayCursor) (pDev, pScreen, pCursor);
}
if (pCursor != CursorCurrent[pDev->id])
{
CursorEventPtr e;
CursorCurrent[pDev->id] = pCursor;
for (e = cursorEvents; e; e = e->next)
{
if ((e->eventMask & XFixesDisplayCursorNotifyMask) &&
!e->pClient->clientGone)
{
xXFixesCursorNotifyEvent ev;
ev.type = XFixesEventBase + XFixesCursorNotify;
ev.subtype = XFixesDisplayCursorNotify;
ev.sequenceNumber = e->pClient->sequence;
ev.window = e->pWindow->drawable.id;
ev.cursorSerial = pCursor->serialNumber;
ev.timestamp = currentTime.milliseconds;
ev.name = pCursor->name;
WriteEventsToClient (e->pClient, 1, (xEvent *) &ev);
}
}
}
Wrap (cs, pScreen, DisplayCursor, backupProc);
return ret;
}
static Bool
CursorCloseScreen (int index, ScreenPtr pScreen)
{
CursorScreenPtr cs = GetCursorScreen (pScreen);
Bool ret;
CloseScreenProcPtr close_proc;
DisplayCursorProcPtr display_proc;
Unwrap (cs, pScreen, CloseScreen, close_proc);
Unwrap (cs, pScreen, DisplayCursor, display_proc);
deleteCursorHideCountsForScreen(pScreen);
ret = (*pScreen->CloseScreen) (index, pScreen);
xfree (cs);
return ret;
}
#define CursorAllEvents (XFixesDisplayCursorNotifyMask)
static int
XFixesSelectCursorInput (ClientPtr pClient,
WindowPtr pWindow,
CARD32 eventMask)
{
CursorEventPtr *prev, e;
pointer 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) xalloc (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,
(pointer) pWindow))
{
xfree (e);
return BadAlloc;
}
if (!AddResource (e->clientResource, CursorClientType, (pointer) 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
SProcXFixesSelectCursorInput (ClientPtr client)
{
register int n;
REQUEST(xXFixesSelectCursorInputReq);
swaps(&stuff->length, n);
swapl(&stuff->window, n);
swapl(&stuff->eventMask, n);
return (*ProcXFixesVector[stuff->xfixesReqType]) (client);
}
void
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;
#ifdef ARGB_CURSOR
if (pCursor->bits->argb)
memcpy (image, pCursor->bits->argb, npixels * sizeof (CARD32));
else
#endif
{
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 = CursorCurrent[PickPointer(client)->id];
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 = xalloc (sizeof (xXFixesGetCursorImageReply) +
npixels * sizeof (CARD32));
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)
{
int n;
swaps (&rep->sequenceNumber, n);
swapl (&rep->length, n);
swaps (&rep->x, n);
swaps (&rep->y, n);
swaps (&rep->width, n);
swaps (&rep->height, n);
swaps (&rep->xhot, n);
swaps (&rep->yhot, n);
swapl (&rep->cursorSerial, n);
SwapLongs (image, npixels);
}
WriteToClient(client, sizeof (xXFixesGetCursorImageReply) +
(npixels << 2), (char *) rep);
xfree (rep);
return client->noClientException;
}
int
SProcXFixesGetCursorImage (ClientPtr client)
{
int n;
REQUEST(xXFixesGetCursorImageReq);
swaps (&stuff->length, n);
return (*ProcXFixesVector[stuff->xfixesReqType]) (client);
}
int
ProcXFixesSetCursorName (ClientPtr client)
{
CursorPtr pCursor;
char *tchar;
REQUEST(xXFixesSetCursorNameReq);
Atom atom;
REQUEST_AT_LEAST_SIZE(xXFixesSetCursorNameReq);
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(client->noClientException);
}
int
SProcXFixesSetCursorName (ClientPtr client)
{
int n;
REQUEST(xXFixesSetCursorNameReq);
swaps (&stuff->length, n);
REQUEST_AT_LEAST_SIZE(xXFixesSetCursorNameReq);
swapl (&stuff->cursor, n);
swaps (&stuff->nbytes, n);
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.type = X_Reply;
reply.length = bytes_to_int32(len);
reply.sequenceNumber = client->sequence;
reply.atom = pCursor->name;
reply.nbytes = len;
if (client->swapped)
{
int n;
swaps (&reply.sequenceNumber, n);
swapl (&reply.length, n);
swapl (&reply.atom, n);
swaps (&reply.nbytes, n);
}
WriteReplyToClient(client, sizeof(xXFixesGetCursorNameReply), &reply);
WriteToClient(client, len, str);
return(client->noClientException);
}
int
SProcXFixesGetCursorName (ClientPtr client)
{
int n;
REQUEST(xXFixesGetCursorNameReq);
swaps (&stuff->length, n);
REQUEST_SIZE_MATCH(xXFixesGetCursorNameReq);
swapl (&stuff->cursor, n);
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 = CursorCurrent[PickPointer(client)->id];
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 = xalloc (sizeof (xXFixesGetCursorImageAndNameReply) +
npixels * sizeof (CARD32) + nbytesRound);
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)
{
int n;
swaps (&rep->sequenceNumber, n);
swapl (&rep->length, n);
swaps (&rep->x, n);
swaps (&rep->y, n);
swaps (&rep->width, n);
swaps (&rep->height, n);
swaps (&rep->xhot, n);
swaps (&rep->yhot, n);
swapl (&rep->cursorSerial, n);
swapl (&rep->cursorName, n);
swaps (&rep->nbytes, n);
SwapLongs (image, npixels);
}
WriteToClient(client, sizeof (xXFixesGetCursorImageAndNameReply) +
(npixels << 2) + nbytesRound, (char *) rep);
xfree (rep);
return client->noClientException;
}
int
SProcXFixesGetCursorImageAndName (ClientPtr client)
{
int n;
REQUEST(xXFixesGetCursorImageAndNameReq);
swaps (&stuff->length, n);
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, pointer closure);
typedef struct {
RESTYPE type;
TestCursorFunc testCursor;
CursorPtr pNew;
pointer closure;
} ReplaceCursorLookupRec, *ReplaceCursorLookupPtr;
static const RESTYPE CursorRestypes[] = {
RT_WINDOW, RT_PASSIVEGRAB, RT_CURSOR
};
#define NUM_CURSOR_RESTYPES (sizeof (CursorRestypes) / sizeof (CursorRestypes[0]))
static Bool
ReplaceCursorLookup (pointer value, XID id, pointer 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))
{
rcl->pNew->refcnt++;
/* either redirect reference or update resource database */
if (pCursorRef)
*pCursorRef = rcl->pNew;
else
ChangeResourceValue (id, RT_CURSOR, rcl->pNew);
FreeCursor (pCursor, cursor);
}
}
return FALSE; /* keep walking */
}
static void
ReplaceCursor (CursorPtr pCursor,
TestCursorFunc testCursor,
pointer 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 < NUM_CURSOR_RESTYPES; resIndex++)
{
rcl.type = CursorRestypes[resIndex];
/*
* This function walks the entire client resource database
*/
LookupClientResourceComplex (clients[clientIndex],
rcl.type,
ReplaceCursorLookup,
(pointer) &rcl);
}
}
/* this "knows" that WindowHasNewCursor doesn't depend on it's argument */
WindowHasNewCursor (WindowTable[0]);
}
static Bool
TestForCursor (CursorPtr pCursor, pointer 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, (pointer) pDestination);
return (client->noClientException);
}
int
SProcXFixesChangeCursor (ClientPtr client)
{
int n;
REQUEST(xXFixesChangeCursorReq);
swaps (&stuff->length, n);
REQUEST_SIZE_MATCH(xXFixesChangeCursorReq);
swapl (&stuff->source, n);
swapl (&stuff->destination, n);
return (*ProcXFixesVector[stuff->xfixesReqType]) (client);
}
static Bool
TestForCursorName (CursorPtr pCursor, pointer 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 (client->noClientException);
}
int
SProcXFixesChangeCursorByName (ClientPtr client)
{
int n;
REQUEST(xXFixesChangeCursorByNameReq);
swaps (&stuff->length, n);
REQUEST_AT_LEAST_SIZE (xXFixesChangeCursorByNameReq);
swapl (&stuff->source, n);
swaps (&stuff->nbytes, n);
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) xalloc(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,
(pointer) pChc)) {
xfree(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) {
xfree(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((pointer *)&pWin, stuff->window, RT_WINDOW,
client, DixGetAttrAccess);
if (ret != Success) {
client->errorValue = stuff->window;
return (ret == BadValue) ? BadWindow : 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 client->noClientException;
}
/*
* 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, CursorCurrent[dev->id]);
}
}
return ret;
}
int
SProcXFixesHideCursor (ClientPtr client)
{
int n;
REQUEST(xXFixesHideCursorReq);
swaps (&stuff->length, n);
REQUEST_SIZE_MATCH (xXFixesHideCursorReq);
swapl (&stuff->window, n);
return (*ProcXFixesVector[stuff->xfixesReqType]) (client);
}
int
ProcXFixesShowCursor (ClientPtr client)
{
WindowPtr pWin;
CursorHideCountPtr pChc;
int rc;
REQUEST(xXFixesShowCursorReq);
REQUEST_SIZE_MATCH (xXFixesShowCursorReq);
rc = dixLookupResourceByType((pointer *)&pWin, stuff->window, RT_WINDOW,
client, DixGetAttrAccess);
if (rc != Success) {
client->errorValue = stuff->window;
return (rc == BadValue) ? BadWindow : 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 (client->noClientException);
}
int
SProcXFixesShowCursor (ClientPtr client)
{
int n;
REQUEST(xXFixesShowCursorReq);
swaps (&stuff->length, n);
REQUEST_SIZE_MATCH (xXFixesShowCursorReq);
swapl (&stuff->window, n);
return (*ProcXFixesVector[stuff->xfixesReqType]) (client);
}
static int
CursorFreeClient (pointer data, XID id)
{
CursorEventPtr old = (CursorEventPtr) data;
CursorEventPtr *prev, e;
for (prev = &cursorEvents; (e = *prev); prev = &e->next)
{
if (e == old)
{
*prev = e->next;
xfree (e);
break;
}
}
return 1;
}
static int
CursorFreeHideCount (pointer 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, CursorCurrent[dev->id]);
}
return 1;
}
static int
CursorFreeWindow (pointer 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;
}
static CursorPtr
createInvisibleCursor (void)
{
CursorPtr pCursor;
static unsigned int *psrcbits, *pmaskbits;
CursorMetricRec cm;
int rc;
psrcbits = (unsigned int *) xalloc(4);
pmaskbits = (unsigned int *) xalloc(4);
if (psrcbits == NULL || pmaskbits == NULL) {
return NULL;
}
*psrcbits = 0;
*pmaskbits = 0;
cm.width = 1;
cm.height = 1;
cm.xhot = 0;
cm.yhot = 0;
rc = AllocARGBCursor(
(unsigned char *)psrcbits,
(unsigned char *)pmaskbits,
NULL, &cm,
0, 0, 0,
0, 0, 0,
&pCursor, serverClient, (XID)0);
return pCursor;
}
Bool
XFixesCursorInit (void)
{
int i;
if (party_like_its_1989)
CursorVisible = EnableCursor;
for (i = 0; i < screenInfo.numScreens; i++)
{
ScreenPtr pScreen = screenInfo.screens[i];
CursorScreenPtr cs;
cs = (CursorScreenPtr) xalloc (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);
CursorHideCountType = CreateNewResourceType(CursorFreeHideCount);
CursorWindowType = CreateNewResourceType(CursorFreeWindow);
if (pInvisibleCursor == NULL) {
pInvisibleCursor = createInvisibleCursor();
if (pInvisibleCursor == NULL) {
return BadAlloc;
}
}
return CursorClientType && CursorWindowType;
}
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