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xenocara/xserver/xfixes/cursor.c
matthieu 889b860699 Importing xserver from X.Org 7.2RC2
2006-11-26 18:13:41 +00:00

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/*
* $Id: cursor.c,v 1.1.1.1 2006/11/26 18:15:08 matthieu Exp $
*
* Copyright © 2006 Sun Microsystems
*
* 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 Sun Microsystems not be used in
* advertising or publicity pertaining to distribution of the software without
* specific, written prior permission. Sun Microsystems makes no
* representations about the suitability of this software for any purpose. It
* is provided "as is" without express or implied warranty.
*
* SUN MICROSYSTEMS DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
* EVENT SHALL SUN MICROSYSTEMS 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.
*
* 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"
static RESTYPE CursorClientType;
static RESTYPE CursorHideCountType;
static RESTYPE CursorWindowType;
static int CursorScreenPrivateIndex = -1;
static int CursorGeneration;
static CursorPtr CursorCurrent;
static CursorPtr pInvisibleCursor = NULL;
static void deleteCursorHideCountsForScreen (ScreenPtr pScreen);
#define VERIFY_CURSOR(pCursor, cursor, client, access) { \
pCursor = (CursorPtr)SecurityLookupIDByType((client), (cursor), \
RT_CURSOR, (access)); \
if (!pCursor) { \
(client)->errorValue = (cursor); \
return BadCursor; \
} \
}
/*
* 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) ((s)->devPrivates[CursorScreenPrivateIndex].ptr))
#define GetCursorScreenIfSet(s) ((CursorScreenPrivateIndex != -1) ? GetCursorScreen(s) : NULL)
#define SetCursorScreen(s,p) ((s)->devPrivates[CursorScreenPrivateIndex].ptr = (pointer) (p))
#define Wrap(as,s,elt,func) (((as)->elt = (s)->elt), (s)->elt = func)
#define Unwrap(as,s,elt) ((s)->elt = (as)->elt)
static Bool
CursorDisplayCursor (ScreenPtr pScreen,
CursorPtr pCursor)
{
CursorScreenPtr cs = GetCursorScreen(pScreen);
Bool ret;
Unwrap (cs, pScreen, DisplayCursor);
if (cs->pCursorHideCounts != NULL) {
ret = (*pScreen->DisplayCursor) (pScreen, pInvisibleCursor);
} else {
ret = (*pScreen->DisplayCursor) (pScreen, pCursor);
}
if (pCursor != CursorCurrent)
{
CursorEventPtr e;
CursorCurrent = pCursor;
for (e = cursorEvents; e; e = e->next)
{
if (e->eventMask & XFixesDisplayCursorNotifyMask)
{
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, CursorDisplayCursor);
return ret;
}
static Bool
CursorCloseScreen (int index, ScreenPtr pScreen)
{
CursorScreenPtr cs = GetCursorScreen (pScreen);
Bool ret;
Unwrap (cs, pScreen, CloseScreen);
Unwrap (cs, pScreen, DisplayCursor);
deleteCursorHideCountsForScreen(pScreen);
ret = (*pScreen->CloseScreen) (index, pScreen);
xfree (cs);
if (index == 0)
CursorScreenPrivateIndex = -1;
return ret;
}
#define CursorAllEvents (XFixesDisplayCursorNotifyMask)
static int
XFixesSelectCursorInput (ClientPtr pClient,
WindowPtr pWindow,
CARD32 eventMask)
{
CursorEventPtr *prev, e;
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
*/
if (!LookupIDByType(pWindow->drawable.id, CursorWindowType))
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;
REQUEST_SIZE_MATCH (xXFixesSelectCursorInputReq);
pWin = (WindowPtr)SecurityLookupWindow(stuff->window, client,
SecurityReadAccess);
if (!pWin)
return(BadWindow);
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;
int width, height;
int x, y;
REQUEST_SIZE_MATCH(xXFixesGetCursorImageReq);
pCursor = CursorCurrent;
if (!pCursor)
return BadCursor;
GetSpritePosition (&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);
}
(void) 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, SecurityWriteAccess);
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);
char *str;
int len;
REQUEST_SIZE_MATCH(xXFixesGetCursorNameReq);
VERIFY_CURSOR(pCursor, stuff->cursor, client, SecurityReadAccess);
if (pCursor->name)
str = NameForAtom (pCursor->name);
else
str = "";
len = strlen (str);
reply.type = X_Reply;
reply.length = (len + 3) >> 2;
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);
(void)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;
char *name;
int nbytes, nbytesRound;
int width, height;
int x, y;
REQUEST_SIZE_MATCH(xXFixesGetCursorImageAndNameReq);
pCursor = CursorCurrent;
if (!pCursor)
return BadCursor;
GetSpritePosition (&x, &y);
width = pCursor->bits->width;
height = pCursor->bits->height;
npixels = width * height;
name = pCursor->name ? NameForAtom (pCursor->name) : "";
nbytes = strlen (name);
nbytesRound = (nbytes + 3) & ~3;
rep = xalloc (sizeof (xXFixesGetCursorImageAndNameReply) +
npixels * sizeof (CARD32) + nbytesRound);
if (!rep)
return BadAlloc;
rep->type = X_Reply;
rep->sequenceNumber = client->sequence;
rep->length = npixels + (nbytesRound >> 2);
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);
}
(void) 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, SecurityReadAccess);
VERIFY_CURSOR (pDestination, stuff->destination, client, SecurityWriteAccess);
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)
{
return (pCursor->name == (Atom) closure);
}
int
ProcXFixesChangeCursorByName (ClientPtr client)
{
CursorPtr pSource;
Atom name;
char *tchar;
REQUEST(xXFixesChangeCursorByNameReq);
REQUEST_FIXED_SIZE(xXFixesChangeCursorByNameReq, stuff->nbytes);
VERIFY_CURSOR(pSource, stuff->source, client, SecurityReadAccess);
tchar = (char *) &stuff[1];
name = MakeAtom (tchar, stuff->nbytes, FALSE);
if (name)
ReplaceCursor (pSource, TestForCursorName, (pointer) 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);
pWin = (WindowPtr) LookupIDByType (stuff->window, RT_WINDOW);
if (!pWin) {
client->errorValue = stuff->window;
return BadWindow;
}
/*
* 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 = createCursorHideCount(client, pWin->drawable.pScreen);
if (ret == Success) {
(void) CursorDisplayCursor(pWin->drawable.pScreen, CursorCurrent);
}
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;
REQUEST(xXFixesShowCursorReq);
REQUEST_SIZE_MATCH (xXFixesShowCursorReq);
pWin = (WindowPtr) LookupIDByType (stuff->window, RT_WINDOW);
if (!pWin) {
client->errorValue = stuff->window;
return BadWindow;
}
/*
* Has client hidden the cursor on this screen?
* If not, generate an error.
*/
pChc = findCursorHideCount(client, pWin->drawable.pScreen);
if (pChc == NULL) {
return BadMatch;
}
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;
deleteCursorHideCount(pChc, pChc->pScreen);
(void) CursorDisplayCursor(pScreen, CursorCurrent);
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;
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;
pCursor = AllocCursor(
(unsigned char *)psrcbits,
(unsigned char *)pmaskbits,
&cm,
0, 0, 0,
0, 0, 0);
return pCursor;
}
Bool
XFixesCursorInit (void)
{
int i;
if (CursorGeneration != serverGeneration)
{
CursorScreenPrivateIndex = AllocateScreenPrivateIndex ();
if (CursorScreenPrivateIndex < 0)
return FALSE;
CursorGeneration = serverGeneration;
}
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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