--- /dev/null
+/* $XConsortium: grabs.c,v 5.10 94/04/17 20:26:39 dpw Exp $ */
+/* $XFree86: xc/programs/Xserver/dix/grabs.c,v 3.0 1996/04/15 11:19:48 dawes Exp $ */
+/*
+
+Copyright (c) 1987 X Consortium
+
+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, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+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 X CONSORTIUM 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 X Consortium 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 X Consortium.
+
+
+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.
+
+*/
+
+#include "X.h"
+#include "misc.h"
+#define NEED_EVENTS
+#include "Xproto.h"
+#include "windowstr.h"
+#include "inputstr.h"
+#include "cursorstr.h"
+#include "dixgrabs.h"
+
+extern InputInfo inputInfo;
+
+#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
+#if NeedFunctionPrototypes
+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)
+#else
+CreateGrab(client, device, window, eventMask, ownerEvents, keyboardMode,
+ pointerMode, modDevice, modifiers, type, keybut, confineTo, cursor)
+ int client;
+ DeviceIntPtr device;
+ WindowPtr window;
+ Mask eventMask;
+ Bool ownerEvents, keyboardMode, pointerMode;
+ DeviceIntPtr modDevice;
+ unsigned short modifiers;
+ int type;
+ KeyCode keybut; /* key or button */
+ WindowPtr confineTo;
+ CursorPtr cursor;
+#endif
+{
+ 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
+#if NeedFunctionPrototypes
+FreeGrab(GrabPtr pGrab)
+#else
+FreeGrab(pGrab)
+ GrabPtr pGrab;
+#endif
+{
+ 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);
+}
+
+/*ARGSUSED*/
+int
+DeletePassiveGrab(value, id)
+ pointer value;
+ XID id;
+{
+ register 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 *
+#if NeedFunctionPrototypes
+DeleteDetailFromMask(Mask *pDetailMask, unsigned short detail)
+#else
+DeleteDetailFromMask(pDetailMask, detail)
+ Mask *pDetailMask;
+ unsigned short detail;
+#endif
+{
+ register Mask *mask;
+ register 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
+#if NeedFunctionPrototypes
+IsInGrabMask(
+ DetailRec firstDetail,
+ DetailRec secondDetail,
+ unsigned short exception)
+#else
+IsInGrabMask(firstDetail, secondDetail, exception)
+ DetailRec firstDetail, secondDetail;
+ unsigned short exception;
+#endif
+{
+ 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
+#if NeedFunctionPrototypes
+IdenticalExactDetails(
+ unsigned short firstExact,
+ unsigned short secondExact,
+ unsigned short exception)
+#else
+IdenticalExactDetails(firstExact, secondExact, exception)
+ unsigned short firstExact, secondExact, exception;
+#endif
+{
+ if ((firstExact == exception) || (secondExact == exception))
+ return FALSE;
+
+ if (firstExact == secondExact)
+ return TRUE;
+
+ return FALSE;
+}
+
+static Bool
+#if NeedFunctionPrototypes
+DetailSupersedesSecond(
+ DetailRec firstDetail,
+ DetailRec secondDetail,
+ unsigned short exception)
+#else
+DetailSupersedesSecond(firstDetail, secondDetail, exception)
+ DetailRec firstDetail, secondDetail;
+ unsigned short exception;
+#endif
+{
+ if (IsInGrabMask(firstDetail, secondDetail, exception))
+ return TRUE;
+
+ if (IdenticalExactDetails(firstDetail.exact, secondDetail.exact,
+ exception))
+ return TRUE;
+
+ return FALSE;
+}
+
+static Bool
+#if NeedFunctionPrototypes
+GrabSupersedesSecond(GrabPtr pFirstGrab, GrabPtr pSecondGrab)
+#else
+GrabSupersedesSecond(pFirstGrab, pSecondGrab)
+ GrabPtr pFirstGrab, pSecondGrab;
+#endif
+{
+ 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(pFirstGrab, pSecondGrab)
+ GrabPtr pFirstGrab, 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;
+}
+
+int
+AddPassiveGrabToList(pGrab)
+ 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;
+ }
+ }
+ }
+
+ 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(pMinuendGrab)
+ GrabPtr pMinuendGrab;
+{
+ register 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
+}
projects / rdpsrv / blobdiff