/**
* Compares two grabs and returns TRUE if the first grab matches the second
* grab.
*
* A match is when
* - the devices set for the grab are equal (this is optional).
* - the event types for both grabs are equal.
* - XXX
*
* @param ignoreDevice TRUE if the device settings on the grabs are to be
* ignored.
* @return TRUE if the grabs match or FALSE otherwise.
*/
Bool
GrabMatchesSecond(GrabPtr pFirstGrab, GrabPtr pSecondGrab, Bool ignoreDevice)
{
unsigned int any_modifier = (pFirstGrab->grabtype == GRABTYPE_XI2) ?
(unsigned int)XIAnyModifier :
(unsigned int)AnyModifier;
if (pFirstGrab->grabtype != pSecondGrab->grabtype)
return FALSE;
if (pFirstGrab->grabtype == GRABTYPE_XI2)
{
if (pFirstGrab->device == inputInfo.all_devices ||
pSecondGrab->device == inputInfo.all_devices)
{
/* do nothing */
} else if (pFirstGrab->device == inputInfo.all_master_devices)
{
if (pSecondGrab->device != inputInfo.all_master_devices &&
!IsMaster(pSecondGrab->device))
return FALSE;
} else if (pSecondGrab->device == inputInfo.all_master_devices)
{
if (pFirstGrab->device != inputInfo.all_master_devices &&
!IsMaster(pFirstGrab->device))
return FALSE;
} else if (pSecondGrab->device != pFirstGrab->device)
return FALSE;
} else if (!ignoreDevice &&
((pFirstGrab->device != pSecondGrab->device) ||
(pFirstGrab->modifierDevice != pSecondGrab->modifierDevice)))
return FALSE;
if (pFirstGrab->type != pSecondGrab->type)
return FALSE;
if (GrabSupersedesSecond(pFirstGrab, pSecondGrab) ||
GrabSupersedesSecond(pSecondGrab, pFirstGrab))
return TRUE;
if (DetailSupersedesSecond(pSecondGrab->detail, pFirstGrab->detail,
(unsigned int)AnyKey)
&&
DetailSupersedesSecond(pFirstGrab->modifiersDetail,
pSecondGrab->modifiersDetail,
any_modifier))
return TRUE;
if (DetailSupersedesSecond(pFirstGrab->detail, pSecondGrab->detail,
(unsigned int)AnyKey)
&&
DetailSupersedesSecond(pSecondGrab->modifiersDetail,
pFirstGrab->modifiersDetail,
any_modifier))
return TRUE;
return FALSE;
}
static Bool GrabMatchesSecond(
register XtServerGrabPtr pFirstGrab,
register XtServerGrabPtr pSecondGrab)
{
DetailRec firstD, firstM, secondD, secondM;
if (pDisplay(pFirstGrab) != pDisplay(pSecondGrab))
return FALSE;
if (GrabSupersedesSecond(pFirstGrab, pSecondGrab))
return TRUE;
if (GrabSupersedesSecond(pSecondGrab, pFirstGrab))
return TRUE;
firstD.exact = pFirstGrab->keybut;
firstM.exact = pFirstGrab->modifiers;
if (pFirstGrab->hasExt) {
firstD.pMask = GRABEXT(pFirstGrab)->pKeyButMask;
firstM.pMask = GRABEXT(pFirstGrab)->pModifiersMask;
} else {
firstD.pMask = NULL;
firstM.pMask = NULL;
}
secondD.exact = pSecondGrab->keybut;
secondM.exact = pSecondGrab->modifiers;
if (pSecondGrab->hasExt) {
secondD.pMask = GRABEXT(pSecondGrab)->pKeyButMask;
secondM.pMask = GRABEXT(pSecondGrab)->pModifiersMask;
} else {
secondD.pMask = NULL;
secondM.pMask = NULL;
}
if (DetailSupersedesSecond(&secondD, &firstD, (unsigned short)AnyKey) &&
DetailSupersedesSecond(&firstM, &secondM, (unsigned short)AnyModifier))
return TRUE;
if (DetailSupersedesSecond(&firstD, &secondD, (unsigned short)AnyKey) &&
DetailSupersedesSecond(&secondM, &firstM, (unsigned short)AnyModifier))
return TRUE;
return FALSE;
}
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
}
static void DeleteServerGrabFromList(
XtServerGrabPtr *passiveListPtr,
XtServerGrabPtr pMinuendGrab)
{
register XtServerGrabPtr *next;
register XtServerGrabPtr grab;
register XtServerGrabExtPtr ext;
for (next = passiveListPtr; (grab = *next); )
{
if (GrabMatchesSecond(grab, pMinuendGrab) &&
(pDisplay(grab) == pDisplay(pMinuendGrab)))
{
if (GrabSupersedesSecond(pMinuendGrab, grab))
{
/*
* The entry being deleted encompasses the list entry,
* so delete the list entry.
*/
*next = grab->next;
FreeGrab(grab);
continue;
}
if (!grab->hasExt) {
grab = (XtServerGrabPtr)
XtRealloc((char *)grab, (sizeof(XtServerGrabRec) +
sizeof(XtServerGrabExtRec)));
*next = grab;
grab->hasExt = True;
ext = GRABEXT(grab);
ext->pKeyButMask = NULL;
ext->pModifiersMask = NULL;
ext->confineTo = None;
ext->cursor = None;
} else
ext = GRABEXT(grab);
if ((grab->keybut == AnyKey) && (grab->modifiers != AnyModifier))
{
/*
* If the list entry has the key detail of AnyKey, and
* a modifier detail not set to AnyModifier, then we
* simply need to turn off the key detail bit in the
* list entry's key detail mask.
*/
DeleteDetailFromMask(&ext->pKeyButMask, pMinuendGrab->keybut);
} else if ((grab->modifiers == AnyModifier) &&
(grab->keybut != AnyKey)) {
/*
* The list entry has a specific key detail, but its
* modifier detail is set to AnyModifier; so, we only
* need to turn off the specified modifier combination
* in the list entry's modifier mask.
*/
DeleteDetailFromMask(&ext->pModifiersMask,
pMinuendGrab->modifiers);
} else if ((pMinuendGrab->keybut != AnyKey) &&
(pMinuendGrab->modifiers != AnyModifier)) {
/*
* The list entry has a key detail of AnyKey and a
* modifier detail of AnyModifier; the entry being
* deleted has a specific key and a specific modifier
* combination. Therefore, we need to mask off the
* keycode from the list entry, and also create a
* new entry for this keycode, which has a modifier
* mask set to AnyModifier & ~(deleted modifiers).
*/
XtServerGrabPtr pNewGrab;
DeleteDetailFromMask(&ext->pKeyButMask, pMinuendGrab->keybut);
pNewGrab = CreateGrab(grab->widget,
(Boolean)grab->ownerEvents,
(Modifiers)AnyModifier,
pMinuendGrab->keybut,
(int)grab->pointerMode,
(int)grab->keyboardMode,
(Mask)0, (Window)0, (Cursor)0, True);
GRABEXT(pNewGrab)->pModifiersMask =
CopyDetailMask(ext->pModifiersMask);
DeleteDetailFromMask(&GRABEXT(pNewGrab)->pModifiersMask,
pMinuendGrab->modifiers);
pNewGrab->next = *passiveListPtr;
*passiveListPtr = pNewGrab;
} else if (pMinuendGrab->keybut == AnyKey) {
/*
* The list entry has keycode AnyKey and modifier
* AnyModifier; the entry being deleted has
* keycode AnyKey and specific modifiers. So we
* simply need to mask off the specified modifier
* combination.
*/
DeleteDetailFromMask(&ext->pModifiersMask,
pMinuendGrab->modifiers);
} else {
/*
* The list entry has keycode AnyKey and modifier
* AnyModifier; the entry being deleted has a
* specific keycode and modifier AnyModifier. So
* we simply need to mask off the specified
* keycode.
*/
DeleteDetailFromMask(&ext->pKeyButMask, pMinuendGrab->keybut);
}
}
next = &(*next)->next;
}
}