484 lines
13 KiB
C
484 lines
13 KiB
C
/*
|
|
|
|
Copyright 1987, 1998 The Open Group
|
|
|
|
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.
|
|
|
|
The above copyright notice and this permission notice 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 OPEN GROUP 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.
|
|
|
|
Except as contained in this notice, the name of The Open Group shall
|
|
not be used in advertising or otherwise to promote the sale, use or
|
|
other dealings in this Software without prior written authorization
|
|
from The Open Group.
|
|
|
|
|
|
Copyright 1987 by Digital Equipment Corporation, Maynard, Massachusetts,
|
|
|
|
All Rights Reserved
|
|
|
|
Permission to use, copy, modify, and distribute this software and its
|
|
documentation for any purpose and without fee is hereby granted,
|
|
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 Digital not be
|
|
used in advertising or publicity pertaining to distribution of the
|
|
software without specific, written prior permission.
|
|
DIGITAL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
|
|
ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
|
|
DIGITAL 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 <X11/X.h>
|
|
#include "misc.h"
|
|
#define NEED_EVENTS
|
|
#include <X11/Xproto.h>
|
|
#include "windowstr.h"
|
|
#include "inputstr.h"
|
|
#include "cursorstr.h"
|
|
#include "dixgrabs.h"
|
|
|
|
#define BITMASK(i) (((Mask)1) << ((i) & 31))
|
|
#define MASKIDX(i) ((i) >> 5)
|
|
#define MASKWORD(buf, i) buf[MASKIDX(i)]
|
|
#define BITSET(buf, i) MASKWORD(buf, i) |= BITMASK(i)
|
|
#define BITCLEAR(buf, i) MASKWORD(buf, i) &= ~BITMASK(i)
|
|
#define GETBIT(buf, i) (MASKWORD(buf, i) & BITMASK(i))
|
|
|
|
GrabPtr
|
|
CreateGrab(
|
|
int client,
|
|
DeviceIntPtr device,
|
|
WindowPtr window,
|
|
Mask eventMask,
|
|
Bool ownerEvents, Bool keyboardMode, Bool pointerMode,
|
|
DeviceIntPtr modDevice,
|
|
unsigned short modifiers,
|
|
int type,
|
|
KeyCode keybut, /* key or button */
|
|
WindowPtr confineTo,
|
|
CursorPtr cursor)
|
|
{
|
|
GrabPtr grab;
|
|
|
|
grab = (GrabPtr)xalloc(sizeof(GrabRec));
|
|
if (!grab)
|
|
return (GrabPtr)NULL;
|
|
grab->resource = FakeClientID(client);
|
|
grab->device = device;
|
|
grab->coreGrab = ((device == inputInfo.keyboard) ||
|
|
(device == inputInfo.pointer));
|
|
grab->window = window;
|
|
grab->eventMask = eventMask;
|
|
grab->ownerEvents = ownerEvents;
|
|
grab->keyboardMode = keyboardMode;
|
|
grab->pointerMode = pointerMode;
|
|
grab->modifiersDetail.exact = modifiers;
|
|
grab->modifiersDetail.pMask = NULL;
|
|
grab->modifierDevice = modDevice;
|
|
grab->coreMods = ((modDevice == inputInfo.keyboard) ||
|
|
(modDevice == inputInfo.pointer));
|
|
grab->type = type;
|
|
grab->detail.exact = keybut;
|
|
grab->detail.pMask = NULL;
|
|
grab->confineTo = confineTo;
|
|
grab->cursor = cursor;
|
|
if (cursor)
|
|
cursor->refcnt++;
|
|
return grab;
|
|
|
|
}
|
|
|
|
static void
|
|
FreeGrab(GrabPtr pGrab)
|
|
{
|
|
if (pGrab->modifiersDetail.pMask != NULL)
|
|
xfree(pGrab->modifiersDetail.pMask);
|
|
|
|
if (pGrab->detail.pMask != NULL)
|
|
xfree(pGrab->detail.pMask);
|
|
|
|
if (pGrab->cursor)
|
|
FreeCursor(pGrab->cursor, (Cursor)0);
|
|
|
|
xfree(pGrab);
|
|
}
|
|
|
|
int
|
|
DeletePassiveGrab(pointer value, XID id)
|
|
{
|
|
GrabPtr g, prev;
|
|
GrabPtr pGrab = (GrabPtr)value;
|
|
|
|
/* it is OK if the grab isn't found */
|
|
prev = 0;
|
|
for (g = (wPassiveGrabs (pGrab->window)); g; g = g->next)
|
|
{
|
|
if (pGrab == g)
|
|
{
|
|
if (prev)
|
|
prev->next = g->next;
|
|
else
|
|
if (!(pGrab->window->optional->passiveGrabs = g->next))
|
|
CheckWindowOptionalNeed (pGrab->window);
|
|
break;
|
|
}
|
|
prev = g;
|
|
}
|
|
FreeGrab(pGrab);
|
|
return Success;
|
|
}
|
|
|
|
static Mask *
|
|
DeleteDetailFromMask(Mask *pDetailMask, unsigned short detail)
|
|
{
|
|
Mask *mask;
|
|
int i;
|
|
|
|
mask = (Mask *)xalloc(sizeof(Mask) * MasksPerDetailMask);
|
|
if (mask)
|
|
{
|
|
if (pDetailMask)
|
|
for (i = 0; i < MasksPerDetailMask; i++)
|
|
mask[i]= pDetailMask[i];
|
|
else
|
|
for (i = 0; i < MasksPerDetailMask; i++)
|
|
mask[i]= ~0L;
|
|
BITCLEAR(mask, detail);
|
|
}
|
|
return mask;
|
|
}
|
|
|
|
static Bool
|
|
IsInGrabMask(
|
|
DetailRec firstDetail,
|
|
DetailRec secondDetail,
|
|
unsigned short exception)
|
|
{
|
|
if (firstDetail.exact == exception)
|
|
{
|
|
if (firstDetail.pMask == NULL)
|
|
return TRUE;
|
|
|
|
/* (at present) never called with two non-null pMasks */
|
|
if (secondDetail.exact == exception)
|
|
return FALSE;
|
|
|
|
if (GETBIT(firstDetail.pMask, secondDetail.exact))
|
|
return TRUE;
|
|
}
|
|
|
|
return FALSE;
|
|
}
|
|
|
|
static Bool
|
|
IdenticalExactDetails(
|
|
unsigned short firstExact,
|
|
unsigned short secondExact,
|
|
unsigned short exception)
|
|
{
|
|
if ((firstExact == exception) || (secondExact == exception))
|
|
return FALSE;
|
|
|
|
if (firstExact == secondExact)
|
|
return TRUE;
|
|
|
|
return FALSE;
|
|
}
|
|
|
|
static Bool
|
|
DetailSupersedesSecond(
|
|
DetailRec firstDetail,
|
|
DetailRec secondDetail,
|
|
unsigned short exception)
|
|
{
|
|
if (IsInGrabMask(firstDetail, secondDetail, exception))
|
|
return TRUE;
|
|
|
|
if (IdenticalExactDetails(firstDetail.exact, secondDetail.exact,
|
|
exception))
|
|
return TRUE;
|
|
|
|
return FALSE;
|
|
}
|
|
|
|
static Bool
|
|
GrabSupersedesSecond(GrabPtr pFirstGrab, GrabPtr pSecondGrab)
|
|
{
|
|
if (!DetailSupersedesSecond(pFirstGrab->modifiersDetail,
|
|
pSecondGrab->modifiersDetail,
|
|
(unsigned short)AnyModifier))
|
|
return FALSE;
|
|
|
|
if (DetailSupersedesSecond(pFirstGrab->detail,
|
|
pSecondGrab->detail, (unsigned short)AnyKey))
|
|
return TRUE;
|
|
|
|
return FALSE;
|
|
}
|
|
|
|
Bool
|
|
GrabMatchesSecond(GrabPtr pFirstGrab, GrabPtr pSecondGrab)
|
|
{
|
|
if ((pFirstGrab->device != pSecondGrab->device) ||
|
|
(pFirstGrab->modifierDevice != pSecondGrab->modifierDevice) ||
|
|
(pFirstGrab->type != pSecondGrab->type))
|
|
return FALSE;
|
|
|
|
if (GrabSupersedesSecond(pFirstGrab, pSecondGrab) ||
|
|
GrabSupersedesSecond(pSecondGrab, pFirstGrab))
|
|
return TRUE;
|
|
|
|
if (DetailSupersedesSecond(pSecondGrab->detail, pFirstGrab->detail,
|
|
(unsigned short)AnyKey)
|
|
&&
|
|
DetailSupersedesSecond(pFirstGrab->modifiersDetail,
|
|
pSecondGrab->modifiersDetail,
|
|
(unsigned short)AnyModifier))
|
|
return TRUE;
|
|
|
|
if (DetailSupersedesSecond(pFirstGrab->detail, pSecondGrab->detail,
|
|
(unsigned short)AnyKey)
|
|
&&
|
|
DetailSupersedesSecond(pSecondGrab->modifiersDetail,
|
|
pFirstGrab->modifiersDetail,
|
|
(unsigned short)AnyModifier))
|
|
return TRUE;
|
|
|
|
return FALSE;
|
|
}
|
|
|
|
static Bool
|
|
GrabsAreIdentical(GrabPtr pFirstGrab, GrabPtr pSecondGrab)
|
|
{
|
|
if (pFirstGrab->device != pSecondGrab->device ||
|
|
(pFirstGrab->modifierDevice != pSecondGrab->modifierDevice) ||
|
|
(pFirstGrab->type != pSecondGrab->type))
|
|
return FALSE;
|
|
|
|
if (!(DetailSupersedesSecond(pFirstGrab->detail,
|
|
pSecondGrab->detail,
|
|
(unsigned short)AnyKey) &&
|
|
DetailSupersedesSecond(pSecondGrab->detail,
|
|
pFirstGrab->detail,
|
|
(unsigned short)AnyKey)))
|
|
return FALSE;
|
|
|
|
if (!(DetailSupersedesSecond(pFirstGrab->modifiersDetail,
|
|
pSecondGrab->modifiersDetail,
|
|
(unsigned short)AnyModifier) &&
|
|
DetailSupersedesSecond(pSecondGrab->modifiersDetail,
|
|
pFirstGrab->modifiersDetail,
|
|
(unsigned short)AnyModifier)))
|
|
return FALSE;
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
|
|
/**
|
|
* 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(GrabPtr pGrab)
|
|
{
|
|
GrabPtr grab;
|
|
|
|
for (grab = wPassiveGrabs(pGrab->window); grab; grab = grab->next)
|
|
{
|
|
if (GrabMatchesSecond(pGrab, grab))
|
|
{
|
|
if (CLIENT_BITS(pGrab->resource) != CLIENT_BITS(grab->resource))
|
|
{
|
|
FreeGrab(pGrab);
|
|
return BadAccess;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* 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;
|
|
}
|
|
|
|
/* the following is kinda complicated, because we need to be able to back out
|
|
* if any allocation fails
|
|
*/
|
|
|
|
Bool
|
|
DeletePassiveGrabFromList(GrabPtr pMinuendGrab)
|
|
{
|
|
GrabPtr grab;
|
|
GrabPtr *deletes, *adds;
|
|
Mask ***updates, **details;
|
|
int i, ndels, nadds, nups;
|
|
Bool ok;
|
|
|
|
#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 = (GrabPtr *)ALLOCATE_LOCAL(i * sizeof(GrabPtr));
|
|
adds = (GrabPtr *)ALLOCATE_LOCAL(i * sizeof(GrabPtr));
|
|
updates = (Mask ***)ALLOCATE_LOCAL(i * sizeof(Mask **));
|
|
details = (Mask **)ALLOCATE_LOCAL(i * sizeof(Mask *));
|
|
if (!deletes || !adds || !updates || !details)
|
|
{
|
|
if (details) DEALLOCATE_LOCAL(details);
|
|
if (updates) DEALLOCATE_LOCAL(updates);
|
|
if (adds) DEALLOCATE_LOCAL(adds);
|
|
if (deletes) DEALLOCATE_LOCAL(deletes);
|
|
return FALSE;
|
|
}
|
|
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))
|
|
continue;
|
|
if (GrabSupersedesSecond(pMinuendGrab, grab))
|
|
{
|
|
deletes[ndels++] = grab;
|
|
}
|
|
else if ((grab->detail.exact == AnyKey)
|
|
&& (grab->modifiersDetail.exact != AnyModifier))
|
|
{
|
|
UPDATE(grab->detail.pMask, pMinuendGrab->detail.exact);
|
|
}
|
|
else if ((grab->modifiersDetail.exact == AnyModifier)
|
|
&& (grab->detail.exact != AnyKey))
|
|
{
|
|
UPDATE(grab->modifiersDetail.pMask,
|
|
pMinuendGrab->modifiersDetail.exact);
|
|
}
|
|
else if ((pMinuendGrab->detail.exact != AnyKey)
|
|
&& (pMinuendGrab->modifiersDetail.exact != AnyModifier))
|
|
{
|
|
GrabPtr pNewGrab;
|
|
|
|
UPDATE(grab->detail.pMask, pMinuendGrab->detail.exact);
|
|
|
|
pNewGrab = CreateGrab(CLIENT_ID(grab->resource), grab->device,
|
|
grab->window, (Mask)grab->eventMask,
|
|
(Bool)grab->ownerEvents,
|
|
(Bool)grab->keyboardMode,
|
|
(Bool)grab->pointerMode,
|
|
grab->modifierDevice,
|
|
AnyModifier, (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 == AnyKey)
|
|
{
|
|
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++)
|
|
xfree(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++)
|
|
{
|
|
xfree(*updates[i]);
|
|
*updates[i] = details[i];
|
|
}
|
|
}
|
|
DEALLOCATE_LOCAL(details);
|
|
DEALLOCATE_LOCAL(updates);
|
|
DEALLOCATE_LOCAL(adds);
|
|
DEALLOCATE_LOCAL(deletes);
|
|
return ok;
|
|
|
|
#undef UPDATE
|
|
}
|