+++ /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