A passive core grab doesn't specify the device, and is thus created with the ClientPointer as device. When this grab is activated later, don't actually activate the grab on the grab device, but rather change the device to the one that caused the grab to activate. Same procedure for keyboards. Makes core apps _A LOT_ more useable and reduces the need to set the ClientPointer. Only applies to core grabs!
455 lines
12 KiB
C
455 lines
12 KiB
C
/*
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Copyright 1987, 1998 The Open Group
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Permission to use, copy, modify, distribute, and sell this software and its
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documentation for any purpose is hereby granted without fee, provided that
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the above copyright notice appear in all copies and that both that
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copyright notice and this permission notice appear in supporting
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documentation.
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The above copyright notice and this permission notice shall be included
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in all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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IN NO EVENT SHALL THE OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR
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OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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OTHER DEALINGS IN THE SOFTWARE.
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Except as contained in this notice, the name of The Open Group shall
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not be used in advertising or otherwise to promote the sale, use or
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other dealings in this Software without prior written authorization
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from The Open Group.
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Copyright 1987 by Digital Equipment Corporation, Maynard, Massachusetts,
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All Rights Reserved
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Permission to use, copy, modify, and distribute this software and its
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documentation for any purpose and without fee is hereby granted,
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provided that the above copyright notice appear in all copies and that
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both that copyright notice and this permission notice appear in
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supporting documentation, and that the name of Digital not be
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used in advertising or publicity pertaining to distribution of the
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software without specific, written prior permission.
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DIGITAL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
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ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
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DIGITAL BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
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ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
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WHETHER IN AN action OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
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ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
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SOFTWARE.
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*/
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#ifdef HAVE_DIX_CONFIG_H
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#include <dix-config.h>
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#endif
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#include <X11/X.h>
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#include "misc.h"
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#define NEED_EVENTS
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#include <X11/Xproto.h>
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#include "windowstr.h"
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#include "inputstr.h"
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#include "cursorstr.h"
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#include "dixgrabs.h"
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#define BITMASK(i) (((Mask)1) << ((i) & 31))
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#define MASKIDX(i) ((i) >> 5)
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#define MASKWORD(buf, i) buf[MASKIDX(i)]
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#define BITSET(buf, i) MASKWORD(buf, i) |= BITMASK(i)
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#define BITCLEAR(buf, i) MASKWORD(buf, i) &= ~BITMASK(i)
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#define GETBIT(buf, i) (MASKWORD(buf, i) & BITMASK(i))
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GrabPtr
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CreateGrab(
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int client,
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DeviceIntPtr device,
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WindowPtr window,
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Mask eventMask,
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Bool ownerEvents, Bool keyboardMode, Bool pointerMode,
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DeviceIntPtr modDevice,
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unsigned short modifiers,
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int type,
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KeyCode keybut, /* key or button */
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WindowPtr confineTo,
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CursorPtr cursor)
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{
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GrabPtr grab;
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grab = (GrabPtr)xalloc(sizeof(GrabRec));
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if (!grab)
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return (GrabPtr)NULL;
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grab->resource = FakeClientID(client);
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grab->device = device;
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grab->coreGrab = (type < LASTEvent);
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grab->window = window;
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grab->eventMask = eventMask;
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grab->deviceMask = 0;
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grab->ownerEvents = ownerEvents;
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grab->keyboardMode = keyboardMode;
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grab->pointerMode = pointerMode;
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grab->modifiersDetail.exact = modifiers;
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grab->modifiersDetail.pMask = NULL;
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grab->modifierDevice = modDevice;
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grab->coreMods = ((modDevice == inputInfo.keyboard) ||
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(modDevice == inputInfo.pointer));
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grab->type = type;
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grab->detail.exact = keybut;
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grab->detail.pMask = NULL;
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grab->confineTo = confineTo;
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grab->cursor = cursor;
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grab->genericMasks = NULL;
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grab->next = NULL;
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if (cursor)
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cursor->refcnt++;
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return grab;
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}
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static void
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FreeGrab(GrabPtr pGrab)
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{
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if (pGrab->modifiersDetail.pMask != NULL)
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xfree(pGrab->modifiersDetail.pMask);
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if (pGrab->detail.pMask != NULL)
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xfree(pGrab->detail.pMask);
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if (pGrab->cursor)
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FreeCursor(pGrab->cursor, (Cursor)0);
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xfree(pGrab);
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}
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int
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DeletePassiveGrab(pointer value, XID id)
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{
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GrabPtr g, prev;
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GrabPtr pGrab = (GrabPtr)value;
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/* it is OK if the grab isn't found */
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prev = 0;
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for (g = (wPassiveGrabs (pGrab->window)); g; g = g->next)
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{
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if (pGrab == g)
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{
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if (prev)
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prev->next = g->next;
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else
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if (!(pGrab->window->optional->passiveGrabs = g->next))
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CheckWindowOptionalNeed (pGrab->window);
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break;
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}
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prev = g;
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}
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FreeGrab(pGrab);
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return Success;
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}
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static Mask *
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DeleteDetailFromMask(Mask *pDetailMask, unsigned short detail)
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{
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Mask *mask;
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int i;
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mask = (Mask *)xalloc(sizeof(Mask) * MasksPerDetailMask);
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if (mask)
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{
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if (pDetailMask)
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for (i = 0; i < MasksPerDetailMask; i++)
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mask[i]= pDetailMask[i];
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else
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for (i = 0; i < MasksPerDetailMask; i++)
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mask[i]= ~0L;
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BITCLEAR(mask, detail);
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}
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return mask;
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}
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static Bool
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IsInGrabMask(
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DetailRec firstDetail,
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DetailRec secondDetail,
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unsigned short exception)
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{
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if (firstDetail.exact == exception)
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{
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if (firstDetail.pMask == NULL)
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return TRUE;
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/* (at present) never called with two non-null pMasks */
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if (secondDetail.exact == exception)
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return FALSE;
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if (GETBIT(firstDetail.pMask, secondDetail.exact))
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return TRUE;
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}
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return FALSE;
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}
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static Bool
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IdenticalExactDetails(
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unsigned short firstExact,
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unsigned short secondExact,
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unsigned short exception)
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{
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if ((firstExact == exception) || (secondExact == exception))
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return FALSE;
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if (firstExact == secondExact)
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return TRUE;
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return FALSE;
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}
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static Bool
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DetailSupersedesSecond(
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DetailRec firstDetail,
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DetailRec secondDetail,
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unsigned short exception)
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{
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if (IsInGrabMask(firstDetail, secondDetail, exception))
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return TRUE;
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if (IdenticalExactDetails(firstDetail.exact, secondDetail.exact,
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exception))
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return TRUE;
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return FALSE;
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}
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static Bool
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GrabSupersedesSecond(GrabPtr pFirstGrab, GrabPtr pSecondGrab)
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{
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if (!DetailSupersedesSecond(pFirstGrab->modifiersDetail,
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pSecondGrab->modifiersDetail,
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(unsigned short)AnyModifier))
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return FALSE;
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if (DetailSupersedesSecond(pFirstGrab->detail,
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pSecondGrab->detail, (unsigned short)AnyKey))
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return TRUE;
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return FALSE;
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}
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/**
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* Compares two grabs and returns TRUE if the first grab matches the second
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* grab.
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*
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* A match is when
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* - the devices set for the grab are equal (this is optional).
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* - the event types for both grabs are equal.
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* - XXX
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*
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* @param ignoreDevice TRUE if the device settings on the grabs are to be
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* ignored.
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* @return TRUE if the grabs match or FALSE otherwise.
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*/
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Bool
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GrabMatchesSecond(GrabPtr pFirstGrab, GrabPtr pSecondGrab, Bool ignoreDevice)
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{
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if (!ignoreDevice &&
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((pFirstGrab->device != pSecondGrab->device) ||
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(pFirstGrab->modifierDevice != pSecondGrab->modifierDevice)))
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return FALSE;
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if (pFirstGrab->type != pSecondGrab->type)
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return FALSE;
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if (GrabSupersedesSecond(pFirstGrab, pSecondGrab) ||
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GrabSupersedesSecond(pSecondGrab, pFirstGrab))
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return TRUE;
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if (DetailSupersedesSecond(pSecondGrab->detail, pFirstGrab->detail,
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(unsigned short)AnyKey)
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&&
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DetailSupersedesSecond(pFirstGrab->modifiersDetail,
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pSecondGrab->modifiersDetail,
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(unsigned short)AnyModifier))
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return TRUE;
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if (DetailSupersedesSecond(pFirstGrab->detail, pSecondGrab->detail,
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(unsigned short)AnyKey)
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&&
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DetailSupersedesSecond(pSecondGrab->modifiersDetail,
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pFirstGrab->modifiersDetail,
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(unsigned short)AnyModifier))
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return TRUE;
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return FALSE;
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}
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int
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AddPassiveGrabToList(GrabPtr pGrab)
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{
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GrabPtr grab;
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for (grab = wPassiveGrabs(pGrab->window); grab; grab = grab->next)
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{
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if (GrabMatchesSecond(pGrab, grab, FALSE))
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{
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if (CLIENT_BITS(pGrab->resource) != CLIENT_BITS(grab->resource))
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{
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FreeGrab(pGrab);
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return BadAccess;
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}
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}
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}
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if (!pGrab->window->optional && !MakeWindowOptional (pGrab->window))
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{
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FreeGrab(pGrab);
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return BadAlloc;
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}
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pGrab->next = pGrab->window->optional->passiveGrabs;
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pGrab->window->optional->passiveGrabs = pGrab;
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if (AddResource(pGrab->resource, RT_PASSIVEGRAB, (pointer)pGrab))
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return Success;
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return BadAlloc;
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}
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/* the following is kinda complicated, because we need to be able to back out
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* if any allocation fails
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*/
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Bool
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DeletePassiveGrabFromList(GrabPtr pMinuendGrab)
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{
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GrabPtr grab;
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GrabPtr *deletes, *adds;
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Mask ***updates, **details;
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int i, ndels, nadds, nups;
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Bool ok;
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#define UPDATE(mask,exact) \
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if (!(details[nups] = DeleteDetailFromMask(mask, exact))) \
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ok = FALSE; \
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else \
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updates[nups++] = &(mask)
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i = 0;
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for (grab = wPassiveGrabs(pMinuendGrab->window); grab; grab = grab->next)
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i++;
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if (!i)
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return TRUE;
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deletes = (GrabPtr *)ALLOCATE_LOCAL(i * sizeof(GrabPtr));
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adds = (GrabPtr *)ALLOCATE_LOCAL(i * sizeof(GrabPtr));
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updates = (Mask ***)ALLOCATE_LOCAL(i * sizeof(Mask **));
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details = (Mask **)ALLOCATE_LOCAL(i * sizeof(Mask *));
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if (!deletes || !adds || !updates || !details)
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{
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if (details) DEALLOCATE_LOCAL(details);
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if (updates) DEALLOCATE_LOCAL(updates);
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if (adds) DEALLOCATE_LOCAL(adds);
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if (deletes) DEALLOCATE_LOCAL(deletes);
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return FALSE;
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}
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ndels = nadds = nups = 0;
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ok = TRUE;
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for (grab = wPassiveGrabs(pMinuendGrab->window);
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grab && ok;
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grab = grab->next)
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{
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if ((CLIENT_BITS(grab->resource) != CLIENT_BITS(pMinuendGrab->resource)) ||
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!GrabMatchesSecond(grab, pMinuendGrab, FALSE))
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continue;
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if (GrabSupersedesSecond(pMinuendGrab, grab))
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{
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deletes[ndels++] = grab;
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}
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else if ((grab->detail.exact == AnyKey)
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&& (grab->modifiersDetail.exact != AnyModifier))
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{
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UPDATE(grab->detail.pMask, pMinuendGrab->detail.exact);
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}
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else if ((grab->modifiersDetail.exact == AnyModifier)
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&& (grab->detail.exact != AnyKey))
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{
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UPDATE(grab->modifiersDetail.pMask,
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pMinuendGrab->modifiersDetail.exact);
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}
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else if ((pMinuendGrab->detail.exact != AnyKey)
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&& (pMinuendGrab->modifiersDetail.exact != AnyModifier))
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{
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GrabPtr pNewGrab;
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UPDATE(grab->detail.pMask, pMinuendGrab->detail.exact);
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pNewGrab = CreateGrab(CLIENT_ID(grab->resource), grab->device,
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grab->window, (Mask)grab->eventMask,
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(Bool)grab->ownerEvents,
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(Bool)grab->keyboardMode,
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(Bool)grab->pointerMode,
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grab->modifierDevice,
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AnyModifier, (int)grab->type,
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pMinuendGrab->detail.exact,
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grab->confineTo, grab->cursor);
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if (!pNewGrab)
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ok = FALSE;
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else if (!(pNewGrab->modifiersDetail.pMask =
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DeleteDetailFromMask(grab->modifiersDetail.pMask,
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pMinuendGrab->modifiersDetail.exact))
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||
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(!pNewGrab->window->optional &&
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!MakeWindowOptional(pNewGrab->window)))
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{
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FreeGrab(pNewGrab);
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ok = FALSE;
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}
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else if (!AddResource(pNewGrab->resource, RT_PASSIVEGRAB,
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(pointer)pNewGrab))
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ok = FALSE;
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else
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adds[nadds++] = pNewGrab;
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}
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else if (pMinuendGrab->detail.exact == AnyKey)
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{
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UPDATE(grab->modifiersDetail.pMask,
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pMinuendGrab->modifiersDetail.exact);
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}
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else
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{
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UPDATE(grab->detail.pMask, pMinuendGrab->detail.exact);
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}
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}
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if (!ok)
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{
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for (i = 0; i < nadds; i++)
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FreeResource(adds[i]->resource, RT_NONE);
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for (i = 0; i < nups; i++)
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xfree(details[i]);
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}
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else
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{
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for (i = 0; i < ndels; i++)
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FreeResource(deletes[i]->resource, RT_NONE);
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for (i = 0; i < nadds; i++)
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{
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grab = adds[i];
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grab->next = grab->window->optional->passiveGrabs;
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grab->window->optional->passiveGrabs = grab;
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}
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for (i = 0; i < nups; i++)
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{
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xfree(*updates[i]);
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*updates[i] = details[i];
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}
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}
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DEALLOCATE_LOCAL(details);
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DEALLOCATE_LOCAL(updates);
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DEALLOCATE_LOCAL(adds);
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DEALLOCATE_LOCAL(deletes);
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return ok;
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#undef UPDATE
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}
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