/**
* Prepend the new grab to the list of passive grabs on the window.
* Any previously existing grab that matches the new grab will be removed.
* Adding a new grab that would override another client's grab will result in
* a BadAccess.
*
* @return Success or X error code on failure.
*/
int
AddPassiveGrabToList(ClientPtr client, GrabPtr pGrab)
{
GrabPtr grab;
Mask access_mode = DixGrabAccess;
int rc;
for (grab = wPassiveGrabs(pGrab->window); grab; grab = grab->next)
{
if (GrabMatchesSecond(pGrab, grab, FALSE))
{
if (CLIENT_BITS(pGrab->resource) != CLIENT_BITS(grab->resource))
{
FreeGrab(pGrab);
return BadAccess;
}
}
}
if (pGrab->keyboardMode == GrabModeSync||pGrab->pointerMode == GrabModeSync)
access_mode |= DixFreezeAccess;
rc = XaceHook(XACE_DEVICE_ACCESS, client, pGrab->device, access_mode);
if (rc != Success)
return rc;
/* Remove all grabs that match the new one exactly */
for (grab = wPassiveGrabs(pGrab->window); grab; grab = grab->next)
{
if (GrabsAreIdentical(pGrab, grab))
{
DeletePassiveGrabFromList(grab);
break;
}
}
if (!pGrab->window->optional && !MakeWindowOptional (pGrab->window))
{
FreeGrab(pGrab);
return BadAlloc;
}
pGrab->next = pGrab->window->optional->passiveGrabs;
pGrab->window->optional->passiveGrabs = pGrab;
if (AddResource(pGrab->resource, RT_PASSIVEGRAB, (pointer)pGrab))
return Success;
return BadAlloc;
}
void
DeleteDeviceEvents(DeviceIntPtr dev, WindowPtr pWin, ClientPtr client)
{
InputClientsPtr others;
OtherInputMasks *pOthers;
GrabPtr grab, next;
if ((pOthers = wOtherInputMasks(pWin)) != 0)
for (others = pOthers->inputClients; others; others = others->next)
if (SameClient(others, client))
others->mask[dev->id] = NoEventMask;
for (grab = wPassiveGrabs(pWin); grab; grab = next) {
next = grab->next;
if ((grab->device == dev) &&
(client->clientAsMask == CLIENT_BITS(grab->resource)))
FreeResource(grab->resource, RT_NONE);
}
}
int
ProcXFixesChangeSaveSet(ClientPtr client)
{
Bool toRoot, remap;
int result;
WindowPtr pWin;
REQUEST(xXFixesChangeSaveSetReq);
REQUEST_SIZE_MATCH(xXFixesChangeSaveSetReq);
pWin = (WindowPtr) SecurityLookupWindow(stuff->window, client,
SecurityReadAccess);
if (!pWin)
return (BadWindow);
if (client->clientAsMask == (CLIENT_BITS(pWin->drawable.id)))
return BadMatch;
if ((stuff->mode != SetModeInsert) && (stuff->mode != SetModeDelete)) {
client->errorValue = stuff->mode;
return (BadValue);
}
if ((stuff->target != SaveSetNearest) && (stuff->target != SaveSetRoot)) {
client->errorValue = stuff->target;
return (BadValue);
}
if ((stuff->map != SaveSetMap) && (stuff->map != SaveSetUnmap)) {
client->errorValue = stuff->map;
return (BadValue);
}
toRoot = (stuff->target == SaveSetRoot);
remap = (stuff->map == SaveSetMap);
result = AlterSaveSetForClient(client, pWin, stuff->mode, toRoot, remap);
if (client->noClientException != Success)
return (client->noClientException);
else
return (result);
}
Bool
DeletePassiveGrabFromList(GrabPtr pMinuendGrab)
{
GrabPtr grab;
GrabPtr *deletes, *adds;
Mask ***updates, **details;
int i, ndels, nadds, nups;
Bool ok;
unsigned int any_modifier;
unsigned int any_key;
#define UPDATE(mask,exact) \
if (!(details[nups] = DeleteDetailFromMask(mask, exact))) \
ok = FALSE; \
else \
updates[nups++] = &(mask)
i = 0;
for (grab = wPassiveGrabs(pMinuendGrab->window); grab; grab = grab->next)
i++;
if (!i)
return TRUE;
deletes = malloc(i * sizeof(GrabPtr));
adds = malloc(i * sizeof(GrabPtr));
updates = malloc(i * sizeof(Mask **));
details = malloc(i * sizeof(Mask *));
if (!deletes || !adds || !updates || !details) {
free(details);
free(updates);
free(adds);
free(deletes);
return FALSE;
}
any_modifier = (pMinuendGrab->grabtype == XI2) ?
(unsigned int) XIAnyModifier : (unsigned int) AnyModifier;
any_key = (pMinuendGrab->grabtype == XI2) ?
(unsigned int) XIAnyKeycode : (unsigned int) AnyKey;
ndels = nadds = nups = 0;
ok = TRUE;
for (grab = wPassiveGrabs(pMinuendGrab->window);
grab && ok; grab = grab->next) {
if ((CLIENT_BITS(grab->resource) != CLIENT_BITS(pMinuendGrab->resource))
|| !GrabMatchesSecond(grab, pMinuendGrab, (grab->grabtype == CORE)))
continue;
if (GrabSupersedesSecond(pMinuendGrab, grab)) {
deletes[ndels++] = grab;
}
else if ((grab->detail.exact == any_key)
&& (grab->modifiersDetail.exact != any_modifier)) {
UPDATE(grab->detail.pMask, pMinuendGrab->detail.exact);
}
else if ((grab->modifiersDetail.exact == any_modifier)
&& (grab->detail.exact != any_key)) {
UPDATE(grab->modifiersDetail.pMask,
pMinuendGrab->modifiersDetail.exact);
}
else if ((pMinuendGrab->detail.exact != any_key)
&& (pMinuendGrab->modifiersDetail.exact != any_modifier)) {
GrabPtr pNewGrab;
GrabParameters param;
UPDATE(grab->detail.pMask, pMinuendGrab->detail.exact);
memset(¶m, 0, sizeof(param));
param.ownerEvents = grab->ownerEvents;
param.this_device_mode = grab->keyboardMode;
param.other_devices_mode = grab->pointerMode;
param.modifiers = any_modifier;
pNewGrab = CreateGrab(CLIENT_ID(grab->resource), grab->device,
grab->modifierDevice, grab->window,
grab->grabtype,
(GrabMask *) &grab->eventMask,
¶m, (int) grab->type,
pMinuendGrab->detail.exact,
grab->confineTo, grab->cursor);
if (!pNewGrab)
ok = FALSE;
else if (!(pNewGrab->modifiersDetail.pMask =
DeleteDetailFromMask(grab->modifiersDetail.pMask,
pMinuendGrab->modifiersDetail.
exact))
|| (!pNewGrab->window->optional &&
!MakeWindowOptional(pNewGrab->window))) {
FreeGrab(pNewGrab);
ok = FALSE;
}
else if (!AddResource(pNewGrab->resource, RT_PASSIVEGRAB,
(pointer) pNewGrab))
ok = FALSE;
else
adds[nadds++] = pNewGrab;
}
else if (pMinuendGrab->detail.exact == any_key) {
UPDATE(grab->modifiersDetail.pMask,
pMinuendGrab->modifiersDetail.exact);
}
else {
UPDATE(grab->detail.pMask, pMinuendGrab->detail.exact);
}
}
if (!ok) {
for (i = 0; i < nadds; i++)
FreeResource(adds[i]->resource, RT_NONE);
for (i = 0; i < nups; i++)
free(details[i]);
}
else {
for (i = 0; i < ndels; i++)
FreeResource(deletes[i]->resource, RT_NONE);
for (i = 0; i < nadds; i++) {
grab = adds[i];
grab->next = grab->window->optional->passiveGrabs;
grab->window->optional->passiveGrabs = grab;
}
for (i = 0; i < nups; i++) {
free(*updates[i]);
*updates[i] = details[i];
}
}
free(details);
free(updates);
free(adds);
free(deletes);
return ok;
#undef UPDATE
}
