/*

Copyright (c) 2006, Red Hat, Inc.

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
RED HAT 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 Red Hat shall not be
used in advertising or otherwise to promote the sale, use or other dealings
in this Software without prior written authorization from Red Hat.

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 "misc.h"
#include "scrnintstr.h"
#include "os.h"
#include "regionstr.h"
#include "validate.h"
#include "windowstr.h"
#include "input.h"
#include "resource.h"
#include "colormapst.h"
#include "cursorstr.h"
#include "dixstruct.h"
#include "gcstruct.h"
#include "servermd.h"
#include "dixevents.h"
#include "globals.h"


/******
 * Window stuff for server
 *
 *    CreateRootWindow, CreateWindow, ChangeWindowAttributes,
 *    GetWindowAttributes, DeleteWindow, DestroySubWindows,
 *    HandleSaveSet, ReparentWindow, MapWindow, MapSubWindows,
 *    UnmapWindow, UnmapSubWindows, ConfigureWindow, CirculateWindow,
 *
 ******/

static const unsigned char _back_lsb[4] = { 0x88, 0x22, 0x44, 0x11 };
static const unsigned char _back_msb[4] = { 0x11, 0x44, 0x22, 0x88 };

_X_EXPORT int screenIsSaved = SCREEN_SAVER_OFF;

_X_EXPORT ScreenSaverStuffRec savedScreenInfo[MAXSCREENS];

static Bool TileScreenSaver(int i, int kind);

#define INPUTONLY_LEGAL_MASK (CWWinGravity | CWEventMask | \
			      CWDontPropagate | CWOverrideRedirect | CWCursor )

#define BOXES_OVERLAP(b1, b2) \
      (!( ((b1)->x2 <= (b2)->x1)  || \
	( ((b1)->x1 >= (b2)->x2)) || \
	( ((b1)->y2 <= (b2)->y1)) || \
	( ((b1)->y1 >= (b2)->y2)) ) )

#define RedirectSend(pWin) \
    ((pWin->eventMask|wOtherEventMasks(pWin)) & SubstructureRedirectMask)

#define SubSend(pWin) \
    ((pWin->eventMask|wOtherEventMasks(pWin)) & SubstructureNotifyMask)

#define StrSend(pWin) \
    ((pWin->eventMask|wOtherEventMasks(pWin)) & StructureNotifyMask)

#define SubStrSend(pWin,pParent) (StrSend(pWin) || SubSend(pParent))

#ifdef DEBUG
/******
 * PrintWindowTree
 *    For debugging only
 ******/

int
PrintChildren(WindowPtr p1, int indent)
{
    WindowPtr p2;

    int i;

    while (p1) {
        p2 = p1->firstChild;
        for (i = 0; i < indent; i++)
            ErrorF(" ");
        ErrorF("%x\n", p1->drawable.id);
        miPrintRegion(&p1->clipList);
        PrintChildren(p2, indent + 4);
        p1 = p1->nextSib;
    }
}

PrintWindowTree()
{
    int i;

    WindowPtr pWin, p1;

    for (i = 0; i < screenInfo.numScreens; i++) {
        ErrorF("WINDOW %d\n", i);
        pWin = WindowTable[i];
        miPrintRegion(&pWin->clipList);
        p1 = pWin->firstChild;
        PrintChildren(p1, 4);
    }
}
#endif

_X_EXPORT int
TraverseTree(register WindowPtr pWin, VisitWindowProcPtr func, pointer data)
{
    int result;

    WindowPtr pChild;

    if (!(pChild = pWin))
        return (WT_NOMATCH);
    while (1) {
        result = (*func) (pChild, data);
        if (result == WT_STOPWALKING)
            return (WT_STOPWALKING);
        if ((result == WT_WALKCHILDREN) && pChild->firstChild) {
            pChild = pChild->firstChild;
            continue;
        }
        while (!pChild->nextSib && (pChild != pWin))
            pChild = pChild->parent;
        if (pChild == pWin)
            break;
        pChild = pChild->nextSib;
    }
    return (WT_NOMATCH);
}

/*****
 * WalkTree
 *   Walk the window tree, for SCREEN, preforming FUNC(pWin, data) on
 *   each window.  If FUNC returns WT_WALKCHILDREN, traverse the children,
 *   if it returns WT_DONTWALKCHILDREN, dont.  If it returns WT_STOPWALKING
 *   exit WalkTree.  Does depth-first traverse.
 *****/

_X_EXPORT int
WalkTree(ScreenPtr pScreen, VisitWindowProcPtr func, pointer data)
{
    return (TraverseTree(WindowTable[pScreen->myNum], func, data));
}

/* hack for forcing backing store on all windows */
static const int defaultBackingStore = NotUseful;

static void
SetWindowToDefaults(register WindowPtr pWin)
{
    pWin->prevSib = NullWindow;
    pWin->firstChild = NullWindow;
    pWin->lastChild = NullWindow;

    pWin->valdata = (ValidatePtr) NULL;
    pWin->optional = (WindowOptPtr) NULL;
    pWin->cursorIsNone = TRUE;

    pWin->backingStore = NotUseful;
    pWin->DIXsaveUnder = FALSE;
    pWin->backStorage = (pointer) NULL;

    pWin->mapped = FALSE;       /* off */
    pWin->realized = FALSE;     /* off */
    pWin->viewable = FALSE;
    pWin->visibility = VisibilityNotViewable;
    pWin->overrideRedirect = FALSE;
    pWin->saveUnder = FALSE;

    pWin->bitGravity = ForgetGravity;
    pWin->winGravity = NorthWestGravity;

    pWin->eventMask = 0;
    pWin->deliverableEvents = 0;
    pWin->dontPropagate = 0;
    pWin->forcedBS = FALSE;
#ifdef NEED_DBE_BUF_BITS
    pWin->srcBuffer = DBE_FRONT_BUFFER;
    pWin->dstBuffer = DBE_FRONT_BUFFER;
#endif
}

static void
MakeRootTile(WindowPtr pWin)
{
    ScreenPtr pScreen = pWin->drawable.pScreen;

    GCPtr pGC;

    unsigned char back[128];

    int len = BitmapBytePad(sizeof(long));

    const unsigned char *from;
    unsigned char *to;

    int i, j;

    pWin->background.pixmap = (*pScreen->CreatePixmap) (pScreen, 4, 4,
                                                        pScreen->rootDepth);

    pWin->backgroundState = BackgroundPixmap;
    pGC = GetScratchGC(pScreen->rootDepth, pScreen);
    if (!pWin->background.pixmap || !pGC)
        FatalError("could not create root tile");

    {
        CARD32 attributes[2];

        attributes[0] = pScreen->whitePixel;
        attributes[1] = pScreen->blackPixel;

        (void) ChangeGC(pGC, GCForeground | GCBackground, attributes);
    }

    ValidateGC((DrawablePtr) pWin->background.pixmap, pGC);

    from = (screenInfo.bitmapBitOrder == LSBFirst) ? _back_lsb : _back_msb;
    to = back;

    for (i = 4; i > 0; i--, from++)
        for (j = len; j > 0; j--)
            *to++ = *from;

    (*pGC->ops->PutImage) ((DrawablePtr) pWin->background.pixmap, pGC, 1,
                           0, 0, len, 4, 0, XYBitmap, (char *) back);

    FreeScratchGC(pGC);

}

WindowPtr
AllocateWindow(ScreenPtr pScreen)
{
    WindowPtr pWin;

    char *ptr;

    DevUnion *ppriv;

    unsigned *sizes;

    unsigned size;

    int i;

    pWin = malloc(pScreen->totalWindowSize);
    if (pWin) {
        ppriv = (DevUnion *) (pWin + 1);
        pWin->devPrivates = ppriv;
        sizes = pScreen->WindowPrivateSizes;
        ptr = (char *) (ppriv + pScreen->WindowPrivateLen);
        for (i = pScreen->WindowPrivateLen; --i >= 0; ppriv++, sizes++) {
            if ((size = *sizes)) {
                ppriv->ptr = (pointer) ptr;
                ptr += size;
            }
            else
                ppriv->ptr = (pointer) NULL;
        }
#if _XSERVER64
        pWin->drawable.pad0 = 0;
        pWin->drawable.pad1 = 0;
#endif
    }
    return pWin;
}

/*****
 * CreateRootWindow
 *    Makes a window at initialization time for specified screen
 *****/

Bool
CreateRootWindow(ScreenPtr pScreen)
{
    WindowPtr pWin;

    BoxRec box;

    PixmapFormatRec *format;

    pWin = AllocateWindow(pScreen);
    if (!pWin)
        return FALSE;

    savedScreenInfo[pScreen->myNum].pWindow = NULL;
    savedScreenInfo[pScreen->myNum].wid = FakeClientID(0);
    savedScreenInfo[pScreen->myNum].ExternalScreenSaver = NULL;
    screenIsSaved = SCREEN_SAVER_OFF;

    WindowTable[pScreen->myNum] = pWin;

    pWin->drawable.pScreen = pScreen;
    pWin->drawable.type = DRAWABLE_WINDOW;

    pWin->drawable.depth = pScreen->rootDepth;
    for (format = screenInfo.formats;
         format->depth != pScreen->rootDepth; format++);
    pWin->drawable.bitsPerPixel = format->bitsPerPixel;

    pWin->drawable.serialNumber = NEXT_SERIAL_NUMBER;

    pWin->parent = NullWindow;
    SetWindowToDefaults(pWin);

    pWin->optional = malloc(sizeof(WindowOptRec));
    if (!pWin->optional)
        return FALSE;

    pWin->optional->dontPropagateMask = 0;
    pWin->optional->otherEventMasks = 0;
    pWin->optional->otherClients = NULL;
    pWin->optional->passiveGrabs = NULL;
    pWin->optional->userProps = NULL;
    pWin->optional->backingBitPlanes = ~0L;
    pWin->optional->backingPixel = 0;
    pWin->optional->boundingShape = NULL;
    pWin->optional->clipShape = NULL;
    pWin->optional->inputShape = NULL;
    pWin->optional->colormap = pScreen->defColormap;
    pWin->optional->visual = pScreen->rootVisual;

    pWin->nextSib = NullWindow;

    pWin->drawable.id = FakeClientID(0);

    pWin->origin.x = pWin->origin.y = 0;
    pWin->drawable.height = pScreen->height;
    pWin->drawable.width = pScreen->width;
    pWin->drawable.x = pWin->drawable.y = 0;

    box.x1 = 0;
    box.y1 = 0;
    box.x2 = pScreen->width;
    box.y2 = pScreen->height;

    BoxRec *boxptr = &box;

    REGION_INIT(&pWin->clipList, boxptr, 1);
    REGION_INIT(&pWin->winSize, boxptr, 1);
    REGION_INIT(&pWin->borderSize, boxptr, 1);
    REGION_INIT(&pWin->borderClip, boxptr, 1);

    pWin->drawable.class = InputOutput;
    pWin->optional->visual = pScreen->rootVisual;

    pWin->backgroundState = BackgroundPixel;
    pWin->background.pixel = pScreen->whitePixel;

    pWin->borderIsPixel = TRUE;
    pWin->border.pixel = pScreen->blackPixel;
    pWin->borderWidth = 0;

    if (!AddResource(pWin->drawable.id, RT_WINDOW, (pointer) pWin))
        return FALSE;

    pScreen->saveUnderSupport = NotUseful;

    return TRUE;
}

void
InitRootWindow(WindowPtr pWin)
{
    ScreenPtr pScreen = pWin->drawable.pScreen;

    int backFlag = CWBorderPixel | CWCursor | CWBackingStore;

    if (!(*pScreen->CreateWindow) (pWin))
        return;                 /* XXX */
    (*pScreen->PositionWindow) (pWin, 0, 0);

    pWin->cursorIsNone = FALSE;
    pWin->optional->cursor = rootCursor;
    rootCursor->refcnt++;

    if (!blackRoot && !whiteRoot) {
        MakeRootTile(pWin);
        backFlag |= CWBackPixmap;
    }
    else {
        if (blackRoot)
            pWin->background.pixel = pScreen->blackPixel;
        else
            pWin->background.pixel = pScreen->whitePixel;
        backFlag |= CWBackPixel;
    }

    pWin->backingStore = defaultBackingStore;
    pWin->forcedBS = (defaultBackingStore != NotUseful);
    /* We SHOULD check for an error value here XXX */
    (*pScreen->ChangeWindowAttributes) (pWin, backFlag);


    MapWindow(pWin, serverClient);
}

/* Set the region to the intersection of the rectangle and the
 * window's winSize.  The window is typically the parent of the
 * window from which the region came.
 */

void
ClippedRegionFromBox(register WindowPtr pWin, RegionPtr Rgn,
                     register int x, register int y,
                     register int w, register int h)
{
    BoxRec box;

    box = *(REGION_EXTENTS(&pWin->winSize));
    /* we do these calculations to avoid overflows */
    if (x > box.x1)
        box.x1 = x;
    if (y > box.y1)
        box.y1 = y;
    x += w;
    if (x < box.x2)
        box.x2 = x;
    y += h;
    if (y < box.y2)
        box.y2 = y;
    if (box.x1 > box.x2)
        box.x2 = box.x1;
    if (box.y1 > box.y2)
        box.y2 = box.y1;
    REGION_RESET(Rgn, &box);
    REGION_INTERSECT(Rgn, Rgn, &pWin->winSize);
}

static RealChildHeadProc realChildHeadProc = NULL;

void
RegisterRealChildHeadProc(RealChildHeadProc proc)
{
    realChildHeadProc = proc;
}

WindowPtr
RealChildHead(register WindowPtr pWin)
{
    if (realChildHeadProc) {
        return realChildHeadProc(pWin);
    }

    if (!pWin->parent &&
        (screenIsSaved == SCREEN_SAVER_ON) &&
        (HasSaverWindow(pWin->drawable.pScreen->myNum)))
        return (pWin->firstChild);
    else
        return (NullWindow);
}

/*****
 * CreateWindow
 *    Makes a window in response to client request
 *****/

_X_EXPORT WindowPtr
CreateWindow(Window wid, register WindowPtr pParent, int x, int y, unsigned w,
             unsigned h, unsigned bw, unsigned class, register Mask vmask,
             XID *vlist, int depth, ClientPtr client, VisualID visual,
             int *error)
{
    WindowPtr pWin;

    WindowPtr pHead;

    ScreenPtr pScreen;

    xEvent event;

    int idepth, ivisual;

    Bool fOK;

    DepthPtr pDepth;

    PixmapFormatRec *format;

    WindowOptPtr ancwopt;

    if (class == CopyFromParent)
        class = pParent->drawable.class;

    if ((class != InputOutput) && (class != InputOnly)) {
        *error = BadValue;
        client->errorValue = class;
        return NullWindow;
    }

    if ((class != InputOnly) && (pParent->drawable.class == InputOnly)) {
        *error = BadMatch;
        return NullWindow;
    }

    if ((class == InputOnly) && ((bw != 0) || (depth != 0))) {
        *error = BadMatch;
        return NullWindow;
    }

    pScreen = pParent->drawable.pScreen;
    if ((class == InputOutput) && (depth == 0))
        depth = pParent->drawable.depth;
    ancwopt = pParent->optional;
    if (!ancwopt)
        ancwopt = FindWindowWithOptional(pParent)->optional;
    if (visual == CopyFromParent) {
            visual = ancwopt->visual;
    }

    /* Find out if the depth and visual are acceptable for this Screen */
    if ((visual != ancwopt->visual) || (depth != pParent->drawable.depth)) {
        fOK = FALSE;
        for (idepth = 0; idepth < pScreen->numDepths; idepth++) {
            pDepth = (DepthPtr) & pScreen->allowedDepths[idepth];
            if ((depth == pDepth->depth) || (depth == 0)) {
                for (ivisual = 0; ivisual < pDepth->numVids; ivisual++) {
                    if (visual == pDepth->vids[ivisual]) {
                        fOK = TRUE;
                        break;
                    }
                }
            }
        }
        if (fOK == FALSE) {
            *error = BadMatch;
            return NullWindow;
        }
    }

    if (((vmask & (CWBorderPixmap | CWBorderPixel)) == 0) &&
        (class != InputOnly) && (depth != pParent->drawable.depth)) {
        *error = BadMatch;
        return NullWindow;
    }

    if (((vmask & CWColormap) == 0) &&
        (class != InputOnly) &&
        ((visual != ancwopt->visual) || (ancwopt->colormap == None))) {
        *error = BadMatch;
        return NullWindow;
    }

    pWin = AllocateWindow(pScreen);
    if (!pWin) {
        *error = BadAlloc;
        return NullWindow;
    }
    pWin->drawable = pParent->drawable;
    pWin->drawable.depth = depth;
    if (depth == pParent->drawable.depth)
        pWin->drawable.bitsPerPixel = pParent->drawable.bitsPerPixel;
    else {
        for (format = screenInfo.formats; format->depth != depth; format++);
        pWin->drawable.bitsPerPixel = format->bitsPerPixel;
    }
    if (class == InputOnly)
        pWin->drawable.type = (short) UNDRAWABLE_WINDOW;
    pWin->drawable.serialNumber = NEXT_SERIAL_NUMBER;

    pWin->drawable.id = wid;
    pWin->drawable.class = class;

    pWin->parent = pParent;
    SetWindowToDefaults(pWin);

    if (visual != ancwopt->visual) {
        if (!MakeWindowOptional(pWin)) {
            free(pWin);
            *error = BadAlloc;
            return NullWindow;
        }
        pWin->optional->visual = visual;
        pWin->optional->colormap = None;
    }

    pWin->borderWidth = bw;
        pWin->backgroundState = None;

    pWin->borderIsPixel = pParent->borderIsPixel;
    pWin->border = pParent->border;
    if (pWin->borderIsPixel == FALSE)
        pWin->border.pixmap->refcnt++;

    pWin->origin.x = x + (int) bw;
    pWin->origin.y = y + (int) bw;
    pWin->drawable.width = w;
    pWin->drawable.height = h;
    pWin->drawable.x = pParent->drawable.x + x + (int) bw;
    pWin->drawable.y = pParent->drawable.y + y + (int) bw;

    /* set up clip list correctly for unobscured WindowPtr */
    REGION_NULL(&pWin->clipList);
    REGION_NULL(&pWin->borderClip);
    REGION_NULL(&pWin->winSize);
    REGION_NULL(&pWin->borderSize);


    pHead = RealChildHead(pParent);
    if (pHead) {
        pWin->nextSib = pHead->nextSib;
        if (pHead->nextSib)
            pHead->nextSib->prevSib = pWin;
        else
            pParent->lastChild = pWin;
        pHead->nextSib = pWin;
        pWin->prevSib = pHead;
    }
    else {
        pWin->nextSib = pParent->firstChild;
        if (pParent->firstChild)
            pParent->firstChild->prevSib = pWin;
        else
            pParent->lastChild = pWin;
        pParent->firstChild = pWin;
    }

    SetWinSize(pWin);
    SetBorderSize(pWin);

    /* We SHOULD check for an error value here XXX */
    if (!(*pScreen->CreateWindow) (pWin)) {
        *error = BadAlloc;
        DeleteWindow(pWin, None);
        return NullWindow;
    }
    /* We SHOULD check for an error value here XXX */
    (*pScreen->PositionWindow) (pWin, pWin->drawable.x, pWin->drawable.y);

    if (!(vmask & CWEventMask))
        RecalculateDeliverableEvents(pWin);

    if (vmask)
        *error = ChangeWindowAttributes(pWin, vmask, vlist, wClient(pWin));
    else
        *error = Success;

    if (*error != Success) {
        DeleteWindow(pWin, None);
        return NullWindow;
    }
    if (!(vmask & CWBackingStore) && (defaultBackingStore != NotUseful)) {
        XID value = defaultBackingStore;

        (void) ChangeWindowAttributes(pWin, CWBackingStore, &value,
                                      wClient(pWin));
        pWin->forcedBS = TRUE;
    }

    if (SubSend(pParent)) {
        event.u.u.type = CreateNotify;
        event.u.createNotify.window = wid;
        event.u.createNotify.parent = pParent->drawable.id;
        event.u.createNotify.x = x;
        event.u.createNotify.y = y;
        event.u.createNotify.width = w;
        event.u.createNotify.height = h;
        event.u.createNotify.borderWidth = bw;
        event.u.createNotify.override = pWin->overrideRedirect;
        DeliverEvents(pParent, &event, 1, NullWindow);
    }
    return pWin;
}

static void
FreeWindowResources(register WindowPtr pWin)
{
    ScreenPtr pScreen = pWin->drawable.pScreen;

    DeleteWindowFromAnySaveSet(pWin);
    DeleteWindowFromAnySelections(pWin);
    DeleteWindowFromAnyEvents(pWin, TRUE);
    REGION_UNINIT(&pWin->clipList);
    REGION_UNINIT(&pWin->winSize);
    REGION_UNINIT(&pWin->borderClip);
    REGION_UNINIT(&pWin->borderSize);
    if (wBoundingShape(pWin))
        REGION_DESTROY(wBoundingShape(pWin));
    if (wClipShape(pWin))
        REGION_DESTROY(wClipShape(pWin));
    if (wInputShape(pWin))
        REGION_DESTROY(wInputShape(pWin));
    if (pWin->borderIsPixel == FALSE)
        (*pScreen->DestroyPixmap) (pWin->border.pixmap);
    if (pWin->backgroundState == BackgroundPixmap)
        (*pScreen->DestroyPixmap) (pWin->background.pixmap);

    DeleteAllWindowProperties(pWin);
    /* We SHOULD check for an error value here XXX */
    (*pScreen->DestroyWindow) (pWin);
    DisposeWindowOptional(pWin);
}

static void
CrushTree(WindowPtr pWin)
{
    WindowPtr pChild, pSib, pParent;

    UnrealizeWindowProcPtr UnrealizeWindow;

    xEvent event;

    if (!(pChild = pWin->firstChild))
        return;
    UnrealizeWindow = pWin->drawable.pScreen->UnrealizeWindow;
    while (1) {
        if (pChild->firstChild) {
            pChild = pChild->firstChild;
            continue;
        }
        while (1) {
            pParent = pChild->parent;
            if (SubStrSend(pChild, pParent)) {
                event.u.u.type = DestroyNotify;
                event.u.destroyNotify.window = pChild->drawable.id;
                DeliverEvents(pChild, &event, 1, NullWindow);
            }
            FreeResource(pChild->drawable.id, RT_WINDOW);
            pSib = pChild->nextSib;
            pChild->viewable = FALSE;
            if (pChild->realized) {
                pChild->realized = FALSE;
                (*UnrealizeWindow) (pChild);
            }
            FreeWindowResources(pChild);
            free(pChild);
            if ((pChild = pSib))
                break;
            pChild = pParent;
            pChild->firstChild = NullWindow;
            pChild->lastChild = NullWindow;
            if (pChild == pWin)
                return;
        }
    }
}

/*****
 *  DeleteWindow
 *	 Deletes child of window then window itself
 *	 If wid is None, don't send any events
 *****/

int
DeleteWindow(pointer value, XID wid)
{
    WindowPtr pParent;

    WindowPtr pWin = (WindowPtr) value;

    xEvent event;

    UnmapWindow(pWin, FALSE);

    CrushTree(pWin);

    pParent = pWin->parent;
    if (wid && pParent && SubStrSend(pWin, pParent)) {
        event.u.u.type = DestroyNotify;
        event.u.destroyNotify.window = pWin->drawable.id;
        DeliverEvents(pWin, &event, 1, NullWindow);
    }

    FreeWindowResources(pWin);
    if (pParent) {
        if (pParent->firstChild == pWin)
            pParent->firstChild = pWin->nextSib;
        if (pParent->lastChild == pWin)
            pParent->lastChild = pWin->prevSib;
        if (pWin->nextSib)
            pWin->nextSib->prevSib = pWin->prevSib;
        if (pWin->prevSib)
            pWin->prevSib->nextSib = pWin->nextSib;
    }
    free(pWin);
    return Success;
}

void
DestroySubwindows(register WindowPtr pWin, ClientPtr client)
{
    /* XXX
     * The protocol is quite clear that each window should be
     * destroyed in turn, however, unmapping all of the first
     * eliminates most of the calls to ValidateTree.  So,
     * this implementation is incorrect in that all of the
     * UnmapNotifies occur before all of the DestroyNotifies.
     * If you care, simply delete the call to UnmapSubwindows.
     */
    UnmapSubwindows(pWin);
    while (pWin->lastChild)
        FreeResource(pWin->lastChild->drawable.id, RT_NONE);
}

#define DeviceEventMasks (KeyPressMask | KeyReleaseMask | ButtonPressMask | \
    ButtonReleaseMask | PointerMotionMask)

/*****
 *  ChangeWindowAttributes
 *
 *  The value-mask specifies which attributes are to be changed; the
 *  value-list contains one value for each one bit in the mask, from least
 *  to most significant bit in the mask.
 *****/

_X_EXPORT int
ChangeWindowAttributes(register WindowPtr pWin, Mask vmask, XID *vlist,
                       ClientPtr client)
{
    Mask index2;

    XID *pVlist;

    PixmapPtr pPixmap;

    Pixmap pixID;

    CursorPtr pCursor, pOldCursor;

    Cursor cursorID;

    WindowPtr pChild;

    Colormap cmap;

    ColormapPtr pCmap;

    xEvent xE;

    int result;

    ScreenPtr pScreen;

    Mask vmaskCopy = 0;

    Mask tmask;

    unsigned int val;

    int error;

    Bool checkOptional = FALSE;

    Bool borderRelative = FALSE;

    if ((pWin->drawable.class == InputOnly) &&
        (vmask & (~INPUTONLY_LEGAL_MASK)))
        return BadMatch;

    error = Success;
    pScreen = pWin->drawable.pScreen;
    pVlist = vlist;
    tmask = vmask;
    while (tmask) {
        index2 = (Mask) lowbit(tmask);
        tmask &= ~index2;
        switch (index2) {
        case CWBackPixmap:
            pixID = (Pixmap) * pVlist;
            pVlist++;
            if (pWin->backgroundState == ParentRelative)
                borderRelative = TRUE;
            if (pixID == None) {
                    if (pWin->backgroundState == BackgroundPixmap)
                        (*pScreen->DestroyPixmap) (pWin->background.pixmap);
                    if (!pWin->parent)
                        MakeRootTile(pWin);
                    else
                        pWin->backgroundState = None;
            }
            else if (pixID == ParentRelative) {
                if (pWin->parent &&
                    pWin->drawable.depth != pWin->parent->drawable.depth) {
                    error = BadMatch;
                    goto PatchUp;
                }
                if (pWin->backgroundState == BackgroundPixmap)
                    (*pScreen->DestroyPixmap) (pWin->background.pixmap);
                if (!pWin->parent)
                    MakeRootTile(pWin);
                else
                    pWin->backgroundState = ParentRelative;
                borderRelative = TRUE;
                /* Note that the parent's backgroundTile's refcnt is NOT
                 * incremented. */
            }
            else {
                pPixmap = (PixmapPtr) SecurityLookupIDByType(client, pixID,
                                                             RT_PIXMAP,
                                                             SecurityReadAccess);
                if (pPixmap != (PixmapPtr) NULL) {
                    if ((pPixmap->drawable.depth != pWin->drawable.depth) ||
                        (pPixmap->drawable.pScreen != pScreen)) {
                        error = BadMatch;
                        goto PatchUp;
                    }
                    if (pWin->backgroundState == BackgroundPixmap)
                        (*pScreen->DestroyPixmap) (pWin->background.pixmap);
                    pWin->backgroundState = BackgroundPixmap;
                    pWin->background.pixmap = pPixmap;
                    pPixmap->refcnt++;
                }
                else {
                    error = BadPixmap;
                    client->errorValue = pixID;
                    goto PatchUp;
                }
            }
            break;
        case CWBackPixel:
            if (pWin->backgroundState == ParentRelative)
                borderRelative = TRUE;
            if (pWin->backgroundState == BackgroundPixmap)
                (*pScreen->DestroyPixmap) (pWin->background.pixmap);
            pWin->backgroundState = BackgroundPixel;
            pWin->background.pixel = (CARD32) *pVlist;
            /* background pixel overrides background pixmap,
               so don't let the ddx layer see both bits */
            vmaskCopy &= ~CWBackPixmap;
            pVlist++;
            break;
        case CWBorderPixmap:
            pixID = (Pixmap) * pVlist;
            pVlist++;
            if (pixID == CopyFromParent) {
                if (!pWin->parent ||
                    (pWin->drawable.depth != pWin->parent->drawable.depth)) {
                    error = BadMatch;
                    goto PatchUp;
                }
                if (pWin->borderIsPixel == FALSE)
                    (*pScreen->DestroyPixmap) (pWin->border.pixmap);
                pWin->border = pWin->parent->border;
                if ((pWin->borderIsPixel = pWin->parent->borderIsPixel) == TRUE) {
                    index2 = CWBorderPixel;
                }
                else {
                    pWin->parent->border.pixmap->refcnt++;
                }
            }
            else {
                pPixmap = (PixmapPtr) SecurityLookupIDByType(client, pixID,
                                                             RT_PIXMAP,
                                                             SecurityReadAccess);
                if (pPixmap) {
                    if ((pPixmap->drawable.depth != pWin->drawable.depth) ||
                        (pPixmap->drawable.pScreen != pScreen)) {
                        error = BadMatch;
                        goto PatchUp;
                    }
                    if (pWin->borderIsPixel == FALSE)
                        (*pScreen->DestroyPixmap) (pWin->border.pixmap);
                    pWin->borderIsPixel = FALSE;
                    pWin->border.pixmap = pPixmap;
                    pPixmap->refcnt++;
                }
                else {
                    error = BadPixmap;
                    client->errorValue = pixID;
                    goto PatchUp;
                }
            }
            break;
        case CWBorderPixel:
            if (pWin->borderIsPixel == FALSE)
                (*pScreen->DestroyPixmap) (pWin->border.pixmap);
            pWin->borderIsPixel = TRUE;
            pWin->border.pixel = (CARD32) *pVlist;
            /* border pixel overrides border pixmap,
               so don't let the ddx layer see both bits */
            vmaskCopy &= ~CWBorderPixmap;
            pVlist++;
            break;
        case CWBitGravity:
            val = (CARD8) *pVlist;
            pVlist++;
            if (val > StaticGravity) {
                error = BadValue;
                client->errorValue = val;
                goto PatchUp;
            }
            pWin->bitGravity = val;
            break;
        case CWWinGravity:
            val = (CARD8) *pVlist;
            pVlist++;
            if (val > StaticGravity) {
                error = BadValue;
                client->errorValue = val;
                goto PatchUp;
            }
            pWin->winGravity = val;
            break;
        case CWBackingStore:
            val = (CARD8) *pVlist;
            pVlist++;
            if ((val != NotUseful) && (val != WhenMapped) && (val != Always)) {
                error = BadValue;
                client->errorValue = val;
                goto PatchUp;
            }
            pWin->backingStore = val;
            pWin->forcedBS = FALSE;
            break;
        case CWBackingPlanes:
            if (pWin->optional || ((CARD32) *pVlist != (CARD32) ~0L)) {
                if (!pWin->optional && !MakeWindowOptional(pWin)) {
                    error = BadAlloc;
                    goto PatchUp;
                }
                pWin->optional->backingBitPlanes = (CARD32) *pVlist;
                if ((CARD32) *pVlist == (CARD32) ~0L)
                    checkOptional = TRUE;
            }
            pVlist++;
            break;
        case CWBackingPixel:
            if (pWin->optional || (CARD32) *pVlist) {
                if (!pWin->optional && !MakeWindowOptional(pWin)) {
                    error = BadAlloc;
                    goto PatchUp;
                }
                pWin->optional->backingPixel = (CARD32) *pVlist;
                if (!*pVlist)
                    checkOptional = TRUE;
            }
            pVlist++;
            break;
        case CWSaveUnder:
            val = (BOOL) * pVlist;
            pVlist++;
            if ((val != xTrue) && (val != xFalse)) {
                error = BadValue;
                client->errorValue = val;
                goto PatchUp;
            }
            pWin->saveUnder = val;
            break;
        case CWEventMask:
            result = EventSelectForWindow(pWin, client, (Mask) *pVlist);
            if (result) {
                error = result;
                goto PatchUp;
            }
            pVlist++;
            break;
        case CWDontPropagate:
            result = EventSuppressForWindow(pWin, client, (Mask) *pVlist,
                                            &checkOptional);
            if (result) {
                error = result;
                goto PatchUp;
            }
            pVlist++;
            break;
        case CWOverrideRedirect:
            val = (BOOL) * pVlist;
            pVlist++;
            if ((val != xTrue) && (val != xFalse)) {
                error = BadValue;
                client->errorValue = val;
                goto PatchUp;
            }
            pWin->overrideRedirect = val;
            break;
        case CWColormap:
            cmap = (Colormap) * pVlist;
            pVlist++;
            if (cmap == CopyFromParent) {
                if (pWin->parent &&
                        (!pWin->optional ||
                             pWin->optional->visual == wVisual(pWin->parent))) {
                    cmap = wColormap(pWin->parent);
                }
                else
                    cmap = None;
            }
            if (cmap == None) {
                error = BadMatch;
                goto PatchUp;
            }
            pCmap = (ColormapPtr) SecurityLookupIDByType(client, cmap,
                                                         RT_COLORMAP,
                                                         SecurityReadAccess);
            if (!pCmap) {
                error = BadColor;
                client->errorValue = cmap;
                goto PatchUp;
            }
            if (pCmap->pVisual->vid != wVisual(pWin) ||
                pCmap->pScreen != pScreen) {
                error = BadMatch;
                goto PatchUp;
            }
            if (cmap != wColormap(pWin)) {
                if (!pWin->optional) {
                    if (!MakeWindowOptional(pWin)) {
                        error = BadAlloc;
                        goto PatchUp;
                    }
                }
                else if (pWin->parent && cmap == wColormap(pWin->parent))
                    checkOptional = TRUE;

                /*
                 * propagate the original colormap to any children
                 * inheriting it
                 */

                for (pChild = pWin->firstChild; pChild;
                     pChild = pChild->nextSib) {
                    if (!pChild->optional && !MakeWindowOptional(pChild)) {
                        error = BadAlloc;
                        goto PatchUp;
                    }
                }

                pWin->optional->colormap = cmap;

                /*
                 * check on any children now matching the new colormap
                 */

                for (pChild = pWin->firstChild; pChild;
                     pChild = pChild->nextSib) {
                    if (pChild->optional->colormap == cmap)
                        CheckWindowOptionalNeed(pChild);
                }

                xE.u.u.type = ColormapNotify;
                xE.u.colormap.window = pWin->drawable.id;
                xE.u.colormap.colormap = cmap;
                xE.u.colormap.new = xTrue;
                xE.u.colormap.state = IsMapInstalled(cmap, pWin);
                DeliverEvents(pWin, &xE, 1, NullWindow);
            }
            break;
        case CWCursor:
            cursorID = (Cursor) * pVlist;
            pVlist++;
            /*
             * install the new
             */
            if (cursorID == None) {
                if (pWin == WindowTable[pWin->drawable.pScreen->myNum])
                    pCursor = rootCursor;
                else
                    pCursor = (CursorPtr) None;
            }
            else {
                pCursor = (CursorPtr) SecurityLookupIDByType(client, cursorID,
                                                             RT_CURSOR,
                                                             SecurityReadAccess);
                if (!pCursor) {
                    error = BadCursor;
                    client->errorValue = cursorID;
                    goto PatchUp;
                }
            }

            if (pCursor != wCursor(pWin)) {
                /*
                 * patch up child windows so they don't lose cursors.
                 */

                for (pChild = pWin->firstChild; pChild;
                     pChild = pChild->nextSib) {
                    if (!pChild->optional && !pChild->cursorIsNone &&
                        !MakeWindowOptional(pChild)) {
                        error = BadAlloc;
                        goto PatchUp;
                    }
                }

                pOldCursor = 0;
                if (pCursor == (CursorPtr) None) {
                    pWin->cursorIsNone = TRUE;
                    if (pWin->optional) {
                        pOldCursor = pWin->optional->cursor;
                        pWin->optional->cursor = (CursorPtr) None;
                        checkOptional = TRUE;
                    }
                }
                else {
                    if (!pWin->optional) {
                        if (!MakeWindowOptional(pWin)) {
                            error = BadAlloc;
                            goto PatchUp;
                        }
                    }
                    else if (pWin->parent && pCursor == wCursor(pWin->parent))
                        checkOptional = TRUE;
                    pOldCursor = pWin->optional->cursor;
                    pWin->optional->cursor = pCursor;
                    pCursor->refcnt++;
                    pWin->cursorIsNone = FALSE;
                    /*
                     * check on any children now matching the new cursor
                     */

                    for (pChild = pWin->firstChild; pChild;
                         pChild = pChild->nextSib) {
                        if (pChild->optional &&
                            (pChild->optional->cursor == pCursor))
                            CheckWindowOptionalNeed(pChild);
                    }
                }

                if (pWin->realized)
                    WindowHasNewCursor(pWin);

                /* Can't free cursor until here - old cursor
                 * is needed in WindowHasNewCursor
                 */
                if (pOldCursor)
                    FreeCursor(pOldCursor, (Cursor) 0);
            }
            break;
        default:
            error = BadValue;
            client->errorValue = vmask;
            goto PatchUp;
        }
        vmaskCopy |= index2;
    }
 PatchUp:
    if (checkOptional)
        CheckWindowOptionalNeed(pWin);

    /* We SHOULD check for an error value here XXX */
    (*pScreen->ChangeWindowAttributes) (pWin, vmaskCopy);

    /*
       If the border contents have changed, redraw the border.
       Note that this has to be done AFTER pScreen->ChangeWindowAttributes
       for the tile to be rotated, and the correct function selected.
     */
    if (((vmaskCopy & (CWBorderPixel | CWBorderPixmap)) || borderRelative)
        && pWin->viewable && HasBorder(pWin)) {
        RegionRec exposed;

        REGION_NULL(&exposed);
        REGION_SUBTRACT(&exposed, &pWin->borderClip, &pWin->winSize);
        (*pWin->drawable.pScreen->PaintWindowBorder) (pWin, &exposed,
                                                      PW_BORDER);
        REGION_UNINIT(&exposed);
    }
    return error;
}

/*****
 * GetWindowAttributes
 *    Notice that this is different than ChangeWindowAttributes
 *****/

void
GetWindowAttributes(register WindowPtr pWin, ClientPtr client,
                    xGetWindowAttributesReply * wa)
{
    wa->type = X_Reply;
    wa->bitGravity = pWin->bitGravity;
    wa->winGravity = pWin->winGravity;
    if (pWin->forcedBS && pWin->backingStore != Always)
        wa->backingStore = NotUseful;
    else
        wa->backingStore = pWin->backingStore;
    wa->length = (sizeof(xGetWindowAttributesReply) -
                  sizeof(xGenericReply)) >> 2;
    wa->sequenceNumber = client->sequence;
    wa->backingBitPlanes = wBackingBitPlanes(pWin);
    wa->backingPixel = wBackingPixel(pWin);
    wa->saveUnder = (BOOL) pWin->saveUnder;
    wa->override = pWin->overrideRedirect;
    if (!pWin->mapped)
        wa->mapState = IsUnmapped;
    else if (pWin->realized)
        wa->mapState = IsViewable;
    else
        wa->mapState = IsUnviewable;

    wa->colormap = wColormap(pWin);
    wa->mapInstalled = (wa->colormap == None) ? xFalse
        : IsMapInstalled(wa->colormap, pWin);

    wa->yourEventMask = EventMaskForClient(pWin, client);
    wa->allEventMasks = pWin->eventMask | wOtherEventMasks(pWin);
    wa->doNotPropagateMask = wDontPropagateMask(pWin);
    wa->class = pWin->drawable.class;
    wa->visualID = wVisual(pWin);
}

_X_EXPORT WindowPtr
MoveWindowInStack(register WindowPtr pWin, register WindowPtr pNextSib)
{
    WindowPtr pParent = pWin->parent;

    WindowPtr pFirstChange = pWin;      /* highest window where list changes */

    if (pWin->nextSib != pNextSib) {
        WindowPtr pOldNextSib = pWin->nextSib;

        if (!pNextSib) {        /* move to bottom */
            if (pParent->firstChild == pWin)
                pParent->firstChild = pWin->nextSib;
            /* if (pWin->nextSib) *//* is always True: pNextSib == NULL
             * and pWin->nextSib != pNextSib
             * therefore pWin->nextSib != NULL */
            pFirstChange = pWin->nextSib;
            pWin->nextSib->prevSib = pWin->prevSib;
            if (pWin->prevSib)
                pWin->prevSib->nextSib = pWin->nextSib;
            pParent->lastChild->nextSib = pWin;
            pWin->prevSib = pParent->lastChild;
            pWin->nextSib = NullWindow;
            pParent->lastChild = pWin;
        }
        else if (pParent->firstChild == pNextSib) {     /* move to top */
            pFirstChange = pWin;
            if (pParent->lastChild == pWin)
                pParent->lastChild = pWin->prevSib;
            if (pWin->nextSib)
                pWin->nextSib->prevSib = pWin->prevSib;
            if (pWin->prevSib)
                pWin->prevSib->nextSib = pWin->nextSib;
            pWin->nextSib = pParent->firstChild;
            pWin->prevSib = (WindowPtr) NULL;
            pNextSib->prevSib = pWin;
            pParent->firstChild = pWin;
        }
        else {                  /* move in middle of list */

            WindowPtr pOldNext = pWin->nextSib;

            pFirstChange = NullWindow;
            if (pParent->firstChild == pWin)
                pFirstChange = pParent->firstChild = pWin->nextSib;
            if (pParent->lastChild == pWin) {
                pFirstChange = pWin;
                pParent->lastChild = pWin->prevSib;
            }
            if (pWin->nextSib)
                pWin->nextSib->prevSib = pWin->prevSib;
            if (pWin->prevSib)
                pWin->prevSib->nextSib = pWin->nextSib;
            pWin->nextSib = pNextSib;
            pWin->prevSib = pNextSib->prevSib;
            if (pNextSib->prevSib)
                pNextSib->prevSib->nextSib = pWin;
            pNextSib->prevSib = pWin;
            if (!pFirstChange) {        /* do we know it yet? */
                pFirstChange = pParent->firstChild;     /* no, search from top */
                while ((pFirstChange != pWin) && (pFirstChange != pOldNext))
                    pFirstChange = pFirstChange->nextSib;
            }
        }
        if (pWin->drawable.pScreen->RestackWindow)
            (*pWin->drawable.pScreen->RestackWindow) (pWin, pOldNextSib);
    }


    return (pFirstChange);
}

_X_EXPORT void
SetWinSize(register WindowPtr pWin)
{
        ClippedRegionFromBox(pWin->parent, &pWin->winSize,
                             pWin->drawable.x, pWin->drawable.y,
                             (int) pWin->drawable.width,
                             (int) pWin->drawable.height);
    if (wBoundingShape(pWin) || wClipShape(pWin)) {
        REGION_TRANSLATE(&pWin->winSize, -pWin->drawable.x,
                         -pWin->drawable.y);
        if (wBoundingShape(pWin))
            REGION_INTERSECT(&pWin->winSize, &pWin->winSize,
                             wBoundingShape(pWin));
        if (wClipShape(pWin))
            REGION_INTERSECT(&pWin->winSize, &pWin->winSize,
                             wClipShape(pWin));
        REGION_TRANSLATE(&pWin->winSize, pWin->drawable.x,
                         pWin->drawable.y);
    }
}

_X_EXPORT void
SetBorderSize(register WindowPtr pWin)
{
    int bw;

    if (HasBorder(pWin)) {
        bw = wBorderWidth(pWin);
            ClippedRegionFromBox(pWin->parent, &pWin->borderSize,
                                 pWin->drawable.x - bw, pWin->drawable.y - bw,
                                 (int) (pWin->drawable.width + (bw << 1)),
                                 (int) (pWin->drawable.height + (bw << 1)));
        if (wBoundingShape(pWin)) {
            REGION_TRANSLATE(&pWin->borderSize, -pWin->drawable.x,
                             -pWin->drawable.y);
            REGION_INTERSECT(&pWin->borderSize, &pWin->borderSize,
                             wBoundingShape(pWin));
            REGION_TRANSLATE(&pWin->borderSize, pWin->drawable.x,
                             pWin->drawable.y);
            REGION_UNION(&pWin->borderSize, &pWin->borderSize,
                         &pWin->winSize);
        }
    }
    else {
        REGION_COPY(&pWin->borderSize, &pWin->winSize);
    }
}

/**
 *
 *  \param x,y          new window position
 *  \param oldx,oldy    old window position
 *  \param destx,desty  position relative to gravity
 */

_X_EXPORT void
GravityTranslate(register int x, register int y, int oldx, int oldy,
                 int dw, int dh, unsigned gravity,
                 register int *destx, register int *desty)
{
    switch (gravity) {
    case NorthGravity:
        *destx = x + dw / 2;
        *desty = y;
        break;
    case NorthEastGravity:
        *destx = x + dw;
        *desty = y;
        break;
    case WestGravity:
        *destx = x;
        *desty = y + dh / 2;
        break;
    case CenterGravity:
        *destx = x + dw / 2;
        *desty = y + dh / 2;
        break;
    case EastGravity:
        *destx = x + dw;
        *desty = y + dh / 2;
        break;
    case SouthWestGravity:
        *destx = x;
        *desty = y + dh;
        break;
    case SouthGravity:
        *destx = x + dw / 2;
        *desty = y + dh;
        break;
    case SouthEastGravity:
        *destx = x + dw;
        *desty = y + dh;
        break;
    case StaticGravity:
        *destx = oldx;
        *desty = oldy;
        break;
    default:
        *destx = x;
        *desty = y;
        break;
    }
}

/* XXX need to retile border on each window with ParentRelative origin */
_X_EXPORT void
ResizeChildrenWinSize(register WindowPtr pWin, int dx, int dy, int dw, int dh)
{
    ScreenPtr pScreen;

    WindowPtr pSib, pChild;

    Bool resized = (dw || dh);

    pScreen = pWin->drawable.pScreen;

    for (pSib = pWin->firstChild; pSib; pSib = pSib->nextSib) {
        if (resized && (pSib->winGravity > NorthWestGravity)) {
            int cwsx, cwsy;

            cwsx = pSib->origin.x;
            cwsy = pSib->origin.y;
            GravityTranslate(cwsx, cwsy, cwsx - dx, cwsy - dy, dw, dh,
                             pSib->winGravity, &cwsx, &cwsy);
            if (cwsx != pSib->origin.x || cwsy != pSib->origin.y) {
                xEvent event;

                event.u.u.type = GravityNotify;
                event.u.gravity.window = pSib->drawable.id;
                event.u.gravity.x = cwsx - wBorderWidth(pSib);
                event.u.gravity.y = cwsy - wBorderWidth(pSib);
                DeliverEvents(pSib, &event, 1, NullWindow);
                pSib->origin.x = cwsx;
                pSib->origin.y = cwsy;
            }
        }
        pSib->drawable.x = pWin->drawable.x + pSib->origin.x;
        pSib->drawable.y = pWin->drawable.y + pSib->origin.y;
        SetWinSize(pSib);
        SetBorderSize(pSib);
        (*pScreen->PositionWindow) (pSib, pSib->drawable.x, pSib->drawable.y);

        if ((pChild = pSib->firstChild)) {
            while (1) {
                pChild->drawable.x = pChild->parent->drawable.x +
                    pChild->origin.x;
                pChild->drawable.y = pChild->parent->drawable.y +
                    pChild->origin.y;
                SetWinSize(pChild);
                SetBorderSize(pChild);
                (*pScreen->PositionWindow) (pChild,
                                            pChild->drawable.x,
                                            pChild->drawable.y);
                if (pChild->firstChild) {
                    pChild = pChild->firstChild;
                    continue;
                }
                while (!pChild->nextSib && (pChild != pSib))
                    pChild = pChild->parent;
                if (pChild == pSib)
                    break;
                pChild = pChild->nextSib;
            }
        }
    }
}

#define GET_INT16(m, f) \
	if (m & mask) \
	  { \
	     f = (INT16) *pVlist;\
	    pVlist++; \
	 }
#define GET_CARD16(m, f) \
	if (m & mask) \
	 { \
	    f = (CARD16) *pVlist;\
	    pVlist++;\
	 }

#define GET_CARD8(m, f) \
	if (m & mask) \
	 { \
	    f = (CARD8) *pVlist;\
	    pVlist++;\
	 }

#define ChangeMask ((Mask)(CWX | CWY | CWWidth | CWHeight))

#define IllegalInputOnlyConfigureMask (CWBorderWidth)

/*
 * IsSiblingAboveMe
 *     returns Above if pSib above pMe in stack or Below otherwise
 */

static int
IsSiblingAboveMe(register WindowPtr pMe, register WindowPtr pSib)
{
    WindowPtr pWin;

    pWin = pMe->parent->firstChild;
    while (pWin) {
        if (pWin == pSib)
            return (Above);
        else if (pWin == pMe)
            return (Below);
        pWin = pWin->nextSib;
    }
    return (Below);
}

static BoxPtr
WindowExtents(register WindowPtr pWin, register BoxPtr pBox)
{
    pBox->x1 = pWin->drawable.x - wBorderWidth(pWin);
    pBox->y1 = pWin->drawable.y - wBorderWidth(pWin);
    pBox->x2 = pWin->drawable.x + (int) pWin->drawable.width
        + wBorderWidth(pWin);
    pBox->y2 = pWin->drawable.y + (int) pWin->drawable.height
        + wBorderWidth(pWin);
    return (pBox);
}

#define IS_SHAPED(pWin)	(wBoundingShape (pWin) != (RegionPtr) NULL)

static RegionPtr
MakeBoundingRegion(register WindowPtr pWin, BoxPtr pBox)
{
    RegionPtr pRgn;

    pRgn = REGION_CREATE(pBox, 1);
    if (wBoundingShape(pWin)) {
        REGION_TRANSLATE(pRgn, -pWin->origin.x, -pWin->origin.y);
        REGION_INTERSECT(pRgn, pRgn, wBoundingShape(pWin));
        REGION_TRANSLATE(pRgn, pWin->origin.x, pWin->origin.y);
    }
    return pRgn;
}

static Bool
ShapeOverlap(WindowPtr pWin, BoxPtr pWinBox, WindowPtr pSib, BoxPtr pSibBox)
{
    RegionPtr pWinRgn, pSibRgn;

    Bool ret;

    if (!IS_SHAPED(pWin) && !IS_SHAPED(pSib))
        return TRUE;
    pWinRgn = MakeBoundingRegion(pWin, pWinBox);
    pSibRgn = MakeBoundingRegion(pSib, pSibBox);
    REGION_INTERSECT(pWinRgn, pWinRgn, pSibRgn);
    ret = REGION_NOTEMPTY(pWinRgn);
    REGION_DESTROY(pWinRgn);
    REGION_DESTROY(pSibRgn);
    return ret;
}

static Bool
AnyWindowOverlapsMe(WindowPtr pWin, WindowPtr pHead, register BoxPtr box)
{
    WindowPtr pSib;

    BoxRec sboxrec;

    BoxPtr sbox;

    for (pSib = pWin->prevSib; pSib != pHead; pSib = pSib->prevSib) {
        if (pSib->mapped) {
            sbox = WindowExtents(pSib, &sboxrec);
            if (BOXES_OVERLAP(sbox, box)
                && ShapeOverlap(pWin, box, pSib, sbox)
                )
                return (TRUE);
        }
    }
    return (FALSE);
}

static Bool
IOverlapAnyWindow(WindowPtr pWin, register BoxPtr box)
{
    WindowPtr pSib;

    BoxRec sboxrec;

    BoxPtr sbox;

    for (pSib = pWin->nextSib; pSib; pSib = pSib->nextSib) {
        if (pSib->mapped) {
            sbox = WindowExtents(pSib, &sboxrec);
            if (BOXES_OVERLAP(sbox, box)
                && ShapeOverlap(pWin, box, pSib, sbox)
                )
                return (TRUE);
        }
    }
    return (FALSE);
}

/*
 *   WhereDoIGoInTheStack()
 *	  Given pWin and pSib and the relationshipe smode, return
 *	  the window that pWin should go ABOVE.
 *	  If a pSib is specified:
 *	      Above:  pWin is placed just above pSib
 *	      Below:  pWin is placed just below pSib
 *	      TopIf:  if pSib occludes pWin, then pWin is placed
 *		      at the top of the stack
 *	      BottomIf:	 if pWin occludes pSib, then pWin is
 *			 placed at the bottom of the stack
 *	      Opposite: if pSib occludes pWin, then pWin is placed at the
 *			top of the stack, else if pWin occludes pSib, then
 *			pWin is placed at the bottom of the stack
 *
 *	  If pSib is NULL:
 *	      Above:  pWin is placed at the top of the stack
 *	      Below:  pWin is placed at the bottom of the stack
 *	      TopIf:  if any sibling occludes pWin, then pWin is placed at
 *		      the top of the stack
 *	      BottomIf: if pWin occludes any sibline, then pWin is placed at
 *			the bottom of the stack
 *	      Opposite: if any sibling occludes pWin, then pWin is placed at
 *			the top of the stack, else if pWin occludes any
 *			sibling, then pWin is placed at the bottom of the stack
 *
 */

static WindowPtr
WhereDoIGoInTheStack(register WindowPtr pWin,
                     register WindowPtr pSib,
                     short x,
                     short y, unsigned short w, unsigned short h, int smode)
{
    BoxRec box;

    WindowPtr pHead, pFirst;

    if ((pWin == pWin->parent->firstChild) && (pWin == pWin->parent->lastChild))
        return ((WindowPtr) NULL);
    pHead = RealChildHead(pWin->parent);
    pFirst = pHead ? pHead->nextSib : pWin->parent->firstChild;
    box.x1 = x;
    box.y1 = y;
    box.x2 = x + (int) w;
    box.y2 = y + (int) h;
    switch (smode) {
    case Above:
        if (pSib)
            return (pSib);
        else if (pWin == pFirst)
            return (pWin->nextSib);
        else
            return (pFirst);
    case Below:
        if (pSib)
            if (pSib->nextSib != pWin)
                return (pSib->nextSib);
            else
                return (pWin->nextSib);
        else
            return NullWindow;
    case TopIf:
        if ((!pWin->mapped || (pSib && !pSib->mapped)))
            return (pWin->nextSib);
        else if (pSib) {
            if ((IsSiblingAboveMe(pWin, pSib) == Above) &&
                (RECT_IN_REGION(&pSib->borderSize, &box) != rgnOUT))
                return (pFirst);
            else
                return (pWin->nextSib);
        }
        else if (AnyWindowOverlapsMe(pWin, pHead, &box))
            return (pFirst);
        else
            return (pWin->nextSib);
    case BottomIf:
        if ((!pWin->mapped || (pSib && !pSib->mapped)))
            return (pWin->nextSib);
        else if (pSib) {
            if ((IsSiblingAboveMe(pWin, pSib) == Below) &&
                (RECT_IN_REGION(&pSib->borderSize, &box) != rgnOUT))
                return NullWindow;
            else
                return (pWin->nextSib);
        }
        else if (IOverlapAnyWindow(pWin, &box))
            return NullWindow;
        else
            return (pWin->nextSib);
    case Opposite:
        if ((!pWin->mapped || (pSib && !pSib->mapped)))
            return (pWin->nextSib);
        else if (pSib) {
            if (RECT_IN_REGION(&pSib->borderSize, &box) != rgnOUT) {
                if (IsSiblingAboveMe(pWin, pSib) == Above)
                    return (pFirst);
                else
                    return NullWindow;
            }
            else
                return (pWin->nextSib);
        }
        else if (AnyWindowOverlapsMe(pWin, pHead, &box)) {
            /* If I'm occluded, I can't possibly be the first child
             * if (pWin == pWin->parent->firstChild)
             *    return pWin->nextSib;
             */
            return (pFirst);
        }
        else if (IOverlapAnyWindow(pWin, &box))
            return NullWindow;
        else
            return pWin->nextSib;
    default:
    {
        ErrorF("Internal error in ConfigureWindow, smode == %d\n", smode);
        return pWin->nextSib;
    }
    }
}

static void
ReflectStackChange(register WindowPtr pWin,
                   register WindowPtr pSib, VTKind kind)
{
/* Note that pSib might be NULL */

    Bool WasViewable = (Bool) pWin->viewable;

    Bool anyMarked;

    WindowPtr pFirstChange;

    WindowPtr pLayerWin;

    ScreenPtr pScreen = pWin->drawable.pScreen;

    /* if this is a root window, can't be restacked */
    if (!pWin->parent)
        return;

    pFirstChange = MoveWindowInStack(pWin, pSib);

    if (WasViewable) {
        anyMarked = (*pScreen->MarkOverlappedWindows) (pWin, pFirstChange,
                                                       &pLayerWin);
        if (pLayerWin != pWin)
            pFirstChange = pLayerWin;
        if (anyMarked) {
            (*pScreen->ValidateTree) (pLayerWin->parent, pFirstChange, kind);
            (*pScreen->HandleExposures) (pLayerWin->parent);
        }
        if (anyMarked && pWin->drawable.pScreen->PostValidateTree)
            (*pScreen->PostValidateTree) (pLayerWin->parent, pFirstChange,
                                          kind);
    }
    if (pWin->realized)
        WindowsRestructured();
}

/*****
 * ConfigureWindow
 *****/

int
ConfigureWindow(register WindowPtr pWin, register Mask mask, XID *vlist,
                ClientPtr client)
{
#define RESTACK_WIN    0
#define MOVE_WIN       1
#define RESIZE_WIN     2
#define REBORDER_WIN   3
    WindowPtr pSib = NullWindow;

    WindowPtr pParent = pWin->parent;

    Window sibwid = 0;

    Mask index2, tmask;

    XID *pVlist;

    short x, y, beforeX, beforeY;

    unsigned short w = pWin->drawable.width,
        h = pWin->drawable.height, bw = pWin->borderWidth;
    int action, smode = Above;

    xEvent event;

    if ((pWin->drawable.class == InputOnly) &&
        (mask & IllegalInputOnlyConfigureMask))
        return (BadMatch);

    if ((mask & CWSibling) && !(mask & CWStackMode))
        return (BadMatch);

    pVlist = vlist;

    if (pParent) {
        x = pWin->drawable.x - pParent->drawable.x - (int) bw;
        y = pWin->drawable.y - pParent->drawable.y - (int) bw;
    }
    else {
        x = pWin->drawable.x;
        y = pWin->drawable.y;
    }
    beforeX = x;
    beforeY = y;
    action = RESTACK_WIN;
    if ((mask & (CWX | CWY)) && (!(mask & (CWHeight | CWWidth)))) {
        GET_INT16(CWX, x);
        GET_INT16(CWY, y);
        action = MOVE_WIN;
    }
    /* or should be resized */
    else if (mask & (CWX | CWY | CWWidth | CWHeight)) {
        GET_INT16(CWX, x);
        GET_INT16(CWY, y);
        GET_CARD16(CWWidth, w);
        GET_CARD16(CWHeight, h);
        if (!w || !h) {
            client->errorValue = 0;
            return BadValue;
        }
        action = RESIZE_WIN;
    }
    tmask = mask & ~ChangeMask;
    while (tmask) {
        index2 = (Mask) lowbit(tmask);
        tmask &= ~index2;
        switch (index2) {
        case CWBorderWidth:
            GET_CARD16(CWBorderWidth, bw);
            break;
        case CWSibling:
            sibwid = (Window) *pVlist;
            pVlist++;
            pSib = (WindowPtr) SecurityLookupIDByType(client, sibwid,
                                                      RT_WINDOW,
                                                      SecurityReadAccess);
            if (!pSib) {
                client->errorValue = sibwid;
                return (BadWindow);
            }
            if (pSib->parent != pParent)
                return (BadMatch);
            if (pSib == pWin)
                return (BadMatch);
            break;
        case CWStackMode:
            GET_CARD8(CWStackMode, smode);
            if ((smode != TopIf) && (smode != BottomIf) &&
                (smode != Opposite) && (smode != Above) && (smode != Below)) {
                client->errorValue = smode;
                return (BadValue);
            }
            break;
        default:
            client->errorValue = mask;
            return (BadValue);
        }
    }
    /* root really can't be reconfigured, so just return */
    if (!pParent)
        return Success;

    /* Figure out if the window should be moved.  Doesnt
       make the changes to the window if event sent */

    if (mask & CWStackMode)
        pSib = WhereDoIGoInTheStack(pWin, pSib, pParent->drawable.x + x,
                                    pParent->drawable.y + y,
                                    w + (bw << 1), h + (bw << 1), smode);
    else
        pSib = pWin->nextSib;


    if ((!pWin->overrideRedirect) && (RedirectSend(pParent)
        )) {
        event.u.u.type = ConfigureRequest;
        event.u.configureRequest.window = pWin->drawable.id;
        if (mask & CWSibling)
            event.u.configureRequest.sibling = sibwid;
        else
            event.u.configureRequest.sibling = None;
        if (mask & CWStackMode)
            event.u.u.detail = smode;
        else
            event.u.u.detail = Above;
        event.u.configureRequest.x = x;
        event.u.configureRequest.y = y;
        event.u.configureRequest.width = w;
        event.u.configureRequest.height = h;
        event.u.configureRequest.borderWidth = bw;
        event.u.configureRequest.valueMask = mask;
        event.u.configureRequest.parent = pParent->drawable.id;
        if (MaybeDeliverEventsToClient(pParent, &event, 1,
                                       SubstructureRedirectMask, client) == 1)
            return (Success);
    }
    if (action == RESIZE_WIN) {
        Bool size_change = (w != pWin->drawable.width)
            || (h != pWin->drawable.height);

        if (size_change &&
            ((pWin->eventMask | wOtherEventMasks(pWin)) & ResizeRedirectMask)) {
            xEvent eventT;

            eventT.u.u.type = ResizeRequest;
            eventT.u.resizeRequest.window = pWin->drawable.id;
            eventT.u.resizeRequest.width = w;
            eventT.u.resizeRequest.height = h;
            if (MaybeDeliverEventsToClient(pWin, &eventT, 1,
                                           ResizeRedirectMask, client) == 1) {
                /* if event is delivered, leave the actual size alone. */
                w = pWin->drawable.width;
                h = pWin->drawable.height;
                size_change = FALSE;
            }
        }
        if (!size_change) {
            if (mask & (CWX | CWY))
                action = MOVE_WIN;
            else if (mask & (CWStackMode | CWBorderWidth))
                action = RESTACK_WIN;
            else                /* really nothing to do */
                return (Success);
        }
    }

    if (action == RESIZE_WIN)
        /* we've already checked whether there's really a size change */
        goto ActuallyDoSomething;
    if ((mask & CWX) && (x != beforeX))
        goto ActuallyDoSomething;
    if ((mask & CWY) && (y != beforeY))
        goto ActuallyDoSomething;
    if ((mask & CWBorderWidth) && (bw != wBorderWidth(pWin)))
        goto ActuallyDoSomething;
    if (mask & CWStackMode) {
        /* See above for why we always reorder in rootless mode. */
        if (pWin->nextSib != pSib)
            goto ActuallyDoSomething;
    }
    return (Success);

 ActuallyDoSomething:
    if (SubStrSend(pWin, pParent)) {
        event.u.u.type = ConfigureNotify;
        event.u.configureNotify.window = pWin->drawable.id;
        if (pSib)
            event.u.configureNotify.aboveSibling = pSib->drawable.id;
        else
            event.u.configureNotify.aboveSibling = None;
        event.u.configureNotify.x = x;
        event.u.configureNotify.y = y;
        event.u.configureNotify.width = w;
        event.u.configureNotify.height = h;
        event.u.configureNotify.borderWidth = bw;
        event.u.configureNotify.override = pWin->overrideRedirect;
        DeliverEvents(pWin, &event, 1, NullWindow);
    }
    if (mask & CWBorderWidth) {
        if (action == RESTACK_WIN) {
            action = MOVE_WIN;
            pWin->borderWidth = bw;
        }
        else if ((action == MOVE_WIN) &&
                 (beforeX + wBorderWidth(pWin) == x + (int) bw) &&
                 (beforeY + wBorderWidth(pWin) == y + (int) bw)) {
            action = REBORDER_WIN;
            (*pWin->drawable.pScreen->ChangeBorderWidth) (pWin, bw);
        }
        else
            pWin->borderWidth = bw;
    }
    if (action == MOVE_WIN)
        (*pWin->drawable.pScreen->MoveWindow) (pWin, x, y, pSib,
                                               (mask & CWBorderWidth) ? VTOther
                                               : VTMove);
    else if (action == RESIZE_WIN)
        (*pWin->drawable.pScreen->ResizeWindow) (pWin, x, y, w, h, pSib);
    else if (mask & CWStackMode)
        ReflectStackChange(pWin, pSib, VTOther);

    if (action != RESTACK_WIN)
        CheckCursorConfinement(pWin);
    return (Success);
#undef RESTACK_WIN
#undef MOVE_WIN
#undef RESIZE_WIN
#undef REBORDER_WIN
}

/******
 *
 * CirculateWindow
 *    For RaiseLowest, raises the lowest mapped child (if any) that is
 *    obscured by another child to the top of the stack.  For LowerHighest,
 *    lowers the highest mapped child (if any) that is obscuring another
 *    child to the bottom of the stack.	 Exposure processing is performed
 *
 ******/

int
CirculateWindow(WindowPtr pParent, int direction, ClientPtr client)
{
    WindowPtr pWin, pHead, pFirst;

    xEvent event;

    BoxRec box;

    pHead = RealChildHead(pParent);
    pFirst = pHead ? pHead->nextSib : pParent->firstChild;
    if (direction == RaiseLowest) {
        for (pWin = pParent->lastChild;
             (pWin != pHead) &&
             !(pWin->mapped &&
               AnyWindowOverlapsMe(pWin, pHead, WindowExtents(pWin, &box)));
             pWin = pWin->prevSib);
        if (pWin == pHead)
            return Success;
    }
    else {
        for (pWin = pFirst;
             pWin &&
             !(pWin->mapped &&
               IOverlapAnyWindow(pWin, WindowExtents(pWin, &box)));
             pWin = pWin->nextSib);
        if (!pWin)
            return Success;
    }

    event.u.circulate.window = pWin->drawable.id;
    event.u.circulate.parent = pParent->drawable.id;
    event.u.circulate.event = pParent->drawable.id;
    if (direction == RaiseLowest)
        event.u.circulate.place = PlaceOnTop;
    else
        event.u.circulate.place = PlaceOnBottom;

    if (RedirectSend(pParent)) {
        event.u.u.type = CirculateRequest;
        if (MaybeDeliverEventsToClient(pParent, &event, 1,
                                       SubstructureRedirectMask, client) == 1)
            return (Success);
    }

    event.u.u.type = CirculateNotify;
    DeliverEvents(pWin, &event, 1, NullWindow);
    ReflectStackChange(pWin,
                       (direction == RaiseLowest) ? pFirst : NullWindow,
                       VTStack);

    return (Success);
}

static int
CompareWIDs(WindowPtr pWin, pointer value)
{                               /* must conform to VisitWindowProcPtr */
    Window *wid = (Window *) value;

    if (pWin->drawable.id == *wid)
        return (WT_STOPWALKING);
    else
        return (WT_WALKCHILDREN);
}

/*****
 *  ReparentWindow
 *****/

int
ReparentWindow(register WindowPtr pWin, register WindowPtr pParent,
               int x, int y, ClientPtr client)
{
    WindowPtr pPrev, pPriorParent;

    Bool WasMapped = (Bool) (pWin->mapped);

    xEvent event;

    int bw = wBorderWidth(pWin);

    ScreenPtr pScreen;

    pScreen = pWin->drawable.pScreen;
    if (TraverseTree(pWin, CompareWIDs, (pointer) &pParent->drawable.id) ==
        WT_STOPWALKING)
        return (BadMatch);
    if (!MakeWindowOptional(pWin))
        return (BadAlloc);

    if (WasMapped)
        UnmapWindow(pWin, FALSE);

    event.u.u.type = ReparentNotify;
    event.u.reparent.window = pWin->drawable.id;
    event.u.reparent.parent = pParent->drawable.id;
    event.u.reparent.x = x;
    event.u.reparent.y = y;
    event.u.reparent.override = pWin->overrideRedirect;
    DeliverEvents(pWin, &event, 1, pParent);

    /* take out of sibling chain */

    pPriorParent = pPrev = pWin->parent;
    if (pPrev->firstChild == pWin)
        pPrev->firstChild = pWin->nextSib;
    if (pPrev->lastChild == pWin)
        pPrev->lastChild = pWin->prevSib;

    if (pWin->nextSib)
        pWin->nextSib->prevSib = pWin->prevSib;
    if (pWin->prevSib)
        pWin->prevSib->nextSib = pWin->nextSib;

    /* insert at begining of pParent */
    pWin->parent = pParent;
    pPrev = RealChildHead(pParent);
    if (pPrev) {
        pWin->nextSib = pPrev->nextSib;
        if (pPrev->nextSib)
            pPrev->nextSib->prevSib = pWin;
        else
            pParent->lastChild = pWin;
        pPrev->nextSib = pWin;
        pWin->prevSib = pPrev;
    }
    else {
        pWin->nextSib = pParent->firstChild;
        pWin->prevSib = NullWindow;
        if (pParent->firstChild)
            pParent->firstChild->prevSib = pWin;
        else
            pParent->lastChild = pWin;
        pParent->firstChild = pWin;
    }

    pWin->origin.x = x + bw;
    pWin->origin.y = y + bw;
    pWin->drawable.x = x + bw + pParent->drawable.x;
    pWin->drawable.y = y + bw + pParent->drawable.y;

    /* clip to parent */
    SetWinSize(pWin);
    SetBorderSize(pWin);

    if (pScreen->ReparentWindow)
        (*pScreen->ReparentWindow) (pWin, pPriorParent);
    (*pScreen->PositionWindow) (pWin, pWin->drawable.x, pWin->drawable.y);
    ResizeChildrenWinSize(pWin, 0, 0, 0, 0);

    CheckWindowOptionalNeed(pWin);

    if (WasMapped)
        MapWindow(pWin, client);
    RecalculateDeliverableEvents(pWin);
    return (Success);
}

static void
RealizeTree(WindowPtr pWin)
{
    WindowPtr pChild;

    RealizeWindowProcPtr Realize;

    Realize = pWin->drawable.pScreen->RealizeWindow;
    pChild = pWin;
    while (1) {
        if (pChild->mapped) {
            pChild->realized = TRUE;
            pChild->viewable = (pChild->drawable.class == InputOutput);
            (*Realize) (pChild);
            if (pChild->firstChild) {
                pChild = pChild->firstChild;
                continue;
            }
        }
        while (!pChild->nextSib && (pChild != pWin))
            pChild = pChild->parent;
        if (pChild == pWin)
            return;
        pChild = pChild->nextSib;
    }
}

/*****
 * MapWindow
 *    If some other client has selected SubStructureReDirect on the parent
 *    and override-redirect is xFalse, then a MapRequest event is generated,
 *    but the window remains unmapped.	Otherwise, the window is mapped and a
 *    MapNotify event is generated.
 *****/

_X_EXPORT int
MapWindow(register WindowPtr pWin, ClientPtr client)
{
    ScreenPtr pScreen;

    WindowPtr pParent;

    WindowPtr pLayerWin;

    if (pWin->mapped)
        return (Success);


    pScreen = pWin->drawable.pScreen;
    if ((pParent = pWin->parent)) {
        xEvent event;

        Bool anyMarked;


        if ((!pWin->overrideRedirect) && (RedirectSend(pParent)
            )) {
            event.u.u.type = MapRequest;
            event.u.mapRequest.window = pWin->drawable.id;
            event.u.mapRequest.parent = pParent->drawable.id;

            if (MaybeDeliverEventsToClient(pParent, &event, 1,
                                           SubstructureRedirectMask,
                                           client) == 1)
                return (Success);
        }

        pWin->mapped = TRUE;
        if (SubStrSend(pWin, pParent) && MapUnmapEventsEnabled(pWin)) {
            event.u.u.type = MapNotify;
            event.u.mapNotify.window = pWin->drawable.id;
            event.u.mapNotify.override = pWin->overrideRedirect;
            DeliverEvents(pWin, &event, 1, NullWindow);
        }

        if (!pParent->realized)
            return (Success);
        RealizeTree(pWin);
        if (pWin->viewable) {
            anyMarked = (*pScreen->MarkOverlappedWindows) (pWin, pWin,
                                                           &pLayerWin);
            if (anyMarked) {
                (*pScreen->ValidateTree) (pLayerWin->parent, pLayerWin, VTMap);
                (*pScreen->HandleExposures) (pLayerWin->parent);
            }
            if (anyMarked && pScreen->PostValidateTree)
                (*pScreen->PostValidateTree) (pLayerWin->parent, pLayerWin,
                                              VTMap);
        }
        WindowsRestructured();
    }
    else {
        RegionRec temp;

        pWin->mapped = TRUE;
        pWin->realized = TRUE;  /* for roots */
        pWin->viewable = pWin->drawable.class == InputOutput;
        /* We SHOULD check for an error value here XXX */
        (*pScreen->RealizeWindow) (pWin);
        if (pScreen->ClipNotify)
            (*pScreen->ClipNotify) (pWin, 0, 0);
        if (pScreen->PostValidateTree)
            (*pScreen->PostValidateTree) (NullWindow, pWin, VTMap);
        REGION_NULL(&temp);
        REGION_COPY(&temp, &pWin->clipList);
        (*pScreen->WindowExposures) (pWin, &temp, NullRegion);
        REGION_UNINIT(&temp);
    }

    return (Success);
}

/*****
 * MapSubwindows
 *    Performs a MapWindow all unmapped children of the window, in top
 *    to bottom stacking order.
 *****/

void
MapSubwindows(register WindowPtr pParent, ClientPtr client)
{
    WindowPtr pWin;

    WindowPtr pFirstMapped = NullWindow;

    ScreenPtr pScreen;

    Mask parentRedirect;

    Mask parentNotify;

    xEvent event;

    Bool anyMarked;

    WindowPtr pLayerWin;

    pScreen = pParent->drawable.pScreen;
    parentRedirect = RedirectSend(pParent);
    parentNotify = SubSend(pParent);
    anyMarked = FALSE;
    for (pWin = pParent->firstChild; pWin; pWin = pWin->nextSib) {
        if (!pWin->mapped) {
            if (parentRedirect && !pWin->overrideRedirect) {
                event.u.u.type = MapRequest;
                event.u.mapRequest.window = pWin->drawable.id;
                event.u.mapRequest.parent = pParent->drawable.id;

                if (MaybeDeliverEventsToClient(pParent, &event, 1,
                                               SubstructureRedirectMask,
                                               client) == 1)
                    continue;
            }

            pWin->mapped = TRUE;
            if (parentNotify || StrSend(pWin)) {
                event.u.u.type = MapNotify;
                event.u.mapNotify.window = pWin->drawable.id;
                event.u.mapNotify.override = pWin->overrideRedirect;
                DeliverEvents(pWin, &event, 1, NullWindow);
            }

            if (!pFirstMapped)
                pFirstMapped = pWin;
            if (pParent->realized) {
                RealizeTree(pWin);
                if (pWin->viewable) {
                    anyMarked |= (*pScreen->MarkOverlappedWindows) (pWin, pWin,
                                                                    (WindowPtr
                                                                     *) NULL);
                }
            }
        }
    }

    if (pFirstMapped) {
        pLayerWin = (*pScreen->GetLayerWindow) (pParent);
        if (pLayerWin->parent != pParent) {
            anyMarked |= (*pScreen->MarkOverlappedWindows) (pLayerWin,
                                                            pLayerWin,
                                                            (WindowPtr *) NULL);
            pFirstMapped = pLayerWin;
        }
        if (anyMarked) {
            (*pScreen->ValidateTree) (pLayerWin->parent, pFirstMapped, VTMap);
            (*pScreen->HandleExposures) (pLayerWin->parent);
        }
        if (anyMarked && pScreen->PostValidateTree)
            (*pScreen->PostValidateTree) (pLayerWin->parent, pFirstMapped,
                                          VTMap);
        WindowsRestructured();
    }
}

static void
UnrealizeTree(WindowPtr pWin, Bool fromConfigure)
{
    WindowPtr pChild;

    UnrealizeWindowProcPtr Unrealize;

    MarkUnrealizedWindowProcPtr MarkUnrealizedWindow;

    Unrealize = pWin->drawable.pScreen->UnrealizeWindow;
    MarkUnrealizedWindow = pWin->drawable.pScreen->MarkUnrealizedWindow;
    pChild = pWin;
    while (1) {
        if (pChild->realized) {
            pChild->realized = FALSE;
            pChild->visibility = VisibilityNotViewable;
            (*Unrealize) (pChild);
            DeleteWindowFromAnyEvents(pChild, FALSE);
            if (pChild->viewable) {
                pChild->viewable = FALSE;
                (*MarkUnrealizedWindow) (pChild, pWin, fromConfigure);
                pChild->drawable.serialNumber = NEXT_SERIAL_NUMBER;
            }
            if (pChild->firstChild) {
                pChild = pChild->firstChild;
                continue;
            }
        }
        while (!pChild->nextSib && (pChild != pWin))
            pChild = pChild->parent;
        if (pChild == pWin)
            return;
        pChild = pChild->nextSib;
    }
}

/*****
 * UnmapWindow
 *    If the window is already unmapped, this request has no effect.
 *    Otherwise, the window is unmapped and an UnMapNotify event is
 *    generated.  Cannot unmap a root window.
 *****/

_X_EXPORT int
UnmapWindow(register WindowPtr pWin, Bool fromConfigure)
{
    WindowPtr pParent;

    xEvent event;

    Bool wasRealized = (Bool) pWin->realized;

    Bool wasViewable = (Bool) pWin->viewable;

    ScreenPtr pScreen = pWin->drawable.pScreen;

    WindowPtr pLayerWin = pWin;

    if ((!pWin->mapped) || (!(pParent = pWin->parent)))
        return (Success);
    if (SubStrSend(pWin, pParent) && MapUnmapEventsEnabled(pWin)) {
        event.u.u.type = UnmapNotify;
        event.u.unmapNotify.window = pWin->drawable.id;
        event.u.unmapNotify.fromConfigure = fromConfigure;
        DeliverEvents(pWin, &event, 1, NullWindow);
    }
    if (wasViewable && !fromConfigure) {
        pWin->valdata = UnmapValData;
        (*pScreen->MarkOverlappedWindows) (pWin, pWin->nextSib, &pLayerWin);
        (*pScreen->MarkWindow) (pLayerWin->parent);
    }
    pWin->mapped = FALSE;
    if (wasRealized)
        UnrealizeTree(pWin, fromConfigure);
    if (wasViewable) {
        if (!fromConfigure) {
            (*pScreen->ValidateTree) (pLayerWin->parent, pWin, VTUnmap);
            (*pScreen->HandleExposures) (pLayerWin->parent);
        }
        if (!fromConfigure && pScreen->PostValidateTree)
            (*pScreen->PostValidateTree) (pLayerWin->parent, pWin, VTUnmap);
    }
    if (wasRealized && !fromConfigure)
        WindowsRestructured();
    return (Success);
}

/*****
 * UnmapSubwindows
 *    Performs an UnmapWindow request with the specified mode on all mapped
 *    children of the window, in bottom to top stacking order.
 *****/

void
UnmapSubwindows(register WindowPtr pWin)
{
    WindowPtr pChild, pHead;

    xEvent event;

    Bool wasRealized = (Bool) pWin->realized;

    Bool wasViewable = (Bool) pWin->viewable;

    Bool anyMarked = FALSE;

    Mask parentNotify;

    WindowPtr pLayerWin = NULL;

    ScreenPtr pScreen = pWin->drawable.pScreen;

    if (!pWin->firstChild)
        return;
    parentNotify = SubSend(pWin);
    pHead = RealChildHead(pWin);

    if (wasViewable)
        pLayerWin = (*pScreen->GetLayerWindow) (pWin);

    for (pChild = pWin->lastChild; pChild != pHead; pChild = pChild->prevSib) {
        if (pChild->mapped) {
            if (parentNotify || StrSend(pChild)) {
                event.u.u.type = UnmapNotify;
                event.u.unmapNotify.window = pChild->drawable.id;
                event.u.unmapNotify.fromConfigure = xFalse;
                DeliverEvents(pChild, &event, 1, NullWindow);
            }
            if (pChild->viewable) {
                pChild->valdata = UnmapValData;
                anyMarked = TRUE;
            }
            pChild->mapped = FALSE;
            if (pChild->realized)
                UnrealizeTree(pChild, FALSE);
            if (wasViewable) {
            }
        }
    }
    if (wasViewable) {
        if (anyMarked) {
            if (pLayerWin->parent == pWin)
                (*pScreen->MarkWindow) (pWin);
            else {
                WindowPtr ptmp;

                (*pScreen->MarkOverlappedWindows) (pWin, pLayerWin,
                                                   (WindowPtr *) NULL);
                (*pScreen->MarkWindow) (pLayerWin->parent);

                /* Windows between pWin and pLayerWin may not have been marked */
                ptmp = pWin;

                while (ptmp != pLayerWin->parent) {
                    (*pScreen->MarkWindow) (ptmp);
                    ptmp = ptmp->parent;
                }
                pHead = pWin->firstChild;
            }
            (*pScreen->ValidateTree) (pLayerWin->parent, pHead, VTUnmap);
            (*pScreen->HandleExposures) (pLayerWin->parent);
        }
        if (anyMarked && pScreen->PostValidateTree)
            (*pScreen->PostValidateTree) (pLayerWin->parent, pHead, VTUnmap);
    }
    if (wasRealized)
        WindowsRestructured();
}

void
HandleSaveSet(register ClientPtr client)
{
    WindowPtr pParent, pWin;

    int j;

    for (j = 0; j < client->numSaved; j++) {
        pWin = SaveSetWindow(client->saveSet[j]);
        if (SaveSetToRoot(client->saveSet[j]))
            pParent = WindowTable[pWin->drawable.pScreen->myNum];
        else
        {
            pParent = pWin->parent;
            while (pParent && (wClient(pParent) == client))
                pParent = pParent->parent;
        }
        if (pParent) {
            if (pParent != pWin->parent) {
                ReparentWindow(pWin, pParent,
                               pWin->drawable.x - wBorderWidth(pWin) -
                               pParent->drawable.x,
                               pWin->drawable.y - wBorderWidth(pWin) -
                               pParent->drawable.y, client);
                if (!pWin->realized && pWin->mapped)
                    pWin->mapped = FALSE;
            }
            if (SaveSetRemap(client->saveSet[j]))
                MapWindow(pWin, client);
        }
    }
    free(client->saveSet);
    client->numSaved = 0;
    client->saveSet = (SaveSetElt *) NULL;
}

/**
 *
 *  \param x,y  in root
 *  \param box  "return" value
 */
Bool
VisibleBoundingBoxFromPoint(register WindowPtr pWin, int x, int y, BoxPtr box)
{
    if (!pWin->realized)
        return (FALSE);
    if (POINT_IN_REGION(&pWin->clipList, x, y, box))
        return (TRUE);
    return (FALSE);
}

/**
 *
 * \param x,y  in root
 */
Bool
PointInWindowIsVisible(register WindowPtr pWin, int x, int y)
{
    BoxRec box;

    if (!pWin->realized)
        return (FALSE);
    if (POINT_IN_REGION(&pWin->borderClip, x, y, &box)
        && (!wInputShape(pWin) ||
            POINT_IN_REGION(
                            wInputShape(pWin),
                            x - pWin->drawable.x, y - pWin->drawable.y, &box)))
        return (TRUE);
    return (FALSE);
}

_X_EXPORT RegionPtr
NotClippedByChildren(register WindowPtr pWin)
{
    RegionPtr pReg;

    pReg = REGION_CREATE(NullBox, 1);
    if (pWin->parent ||
        screenIsSaved != SCREEN_SAVER_ON ||
        !HasSaverWindow(pWin->drawable.pScreen->myNum)) {
        REGION_INTERSECT(pReg, &pWin->borderClip, &pWin->winSize);
    }
    return (pReg);
}

_X_EXPORT void
SendVisibilityNotify(WindowPtr pWin)
{
    xEvent event;

#ifndef NO_XINERAMA_PORT
    unsigned int visibility = pWin->visibility;
#endif

    event.u.u.type = VisibilityNotify;
    event.u.visibility.window = pWin->drawable.id;
    event.u.visibility.state = visibility;
    DeliverEvents(pWin, &event, 1, NullWindow);
}

static WindowPtr windowDisableMapUnmapEvents;

void
DisableMapUnmapEvents(WindowPtr pWin)
{
    assert(windowDisableMapUnmapEvents == NULL);

    windowDisableMapUnmapEvents = pWin;
}

void
EnableMapUnmapEvents(WindowPtr pWin)
{
    assert(windowDisableMapUnmapEvents != NULL);

    windowDisableMapUnmapEvents = NULL;
}

Bool
MapUnmapEventsEnabled(WindowPtr pWin)
{
    return pWin != windowDisableMapUnmapEvents;
}

#define RANDOM_WIDTH 32

#ifndef NOLOGOHACK
static void DrawLogo(WindowPtr pWin);
#endif

_X_EXPORT void
SaveScreens(int on, int mode)
{
    int i;

    int what;

    int type;

    if (on == SCREEN_SAVER_FORCER) {
        UpdateCurrentTimeIf();
        lastDeviceEventTime = currentTime;
        if (mode == ScreenSaverReset)
            what = SCREEN_SAVER_OFF;
        else
            what = SCREEN_SAVER_ON;
        type = what;
    }
    else {
        what = on;
        type = what;
        if (what == screenIsSaved)
            type = SCREEN_SAVER_CYCLE;
    }
    for (i = 0; i < screenInfo.numScreens; i++) {
        if (on == SCREEN_SAVER_FORCER)
            (*screenInfo.screens[i]->SaveScreen) (screenInfo.screens[i], on);
        if (savedScreenInfo[i].ExternalScreenSaver) {
            if ((*savedScreenInfo[i].ExternalScreenSaver)
                (screenInfo.screens[i], type, on == SCREEN_SAVER_FORCER))
                continue;
        }
        if (type == screenIsSaved)
            continue;
        switch (type) {
        case SCREEN_SAVER_OFF:
            if (savedScreenInfo[i].blanked == SCREEN_IS_BLANKED) {
                (*screenInfo.screens[i]->SaveScreen) (screenInfo.screens[i],
                                                      what);
            }
            else if (HasSaverWindow(i)) {
                savedScreenInfo[i].pWindow = NullWindow;
                FreeResource(savedScreenInfo[i].wid, RT_NONE);
            }
            break;
        case SCREEN_SAVER_CYCLE:
            if (savedScreenInfo[i].blanked == SCREEN_IS_TILED) {
                WindowPtr pWin = savedScreenInfo[i].pWindow;

                /* make it look like screen saver is off, so that
                 * NotClippedByChildren will compute a clip list
                 * for the root window, so miPaintWindow works
                 */
                screenIsSaved = SCREEN_SAVER_OFF;
#ifndef NOLOGOHACK
                if (logoScreenSaver)
                    (*pWin->drawable.pScreen->ClearToBackground) (pWin, 0, 0, 0,
                                                                  0, FALSE);
#endif
                (*pWin->drawable.pScreen->MoveWindow) (pWin,
                                                       (short) (-
                                                                (rand() %
                                                                 RANDOM_WIDTH)),
                                                       (short) (-
                                                                (rand() %
                                                                 RANDOM_WIDTH)),
                                                       pWin->nextSib, VTMove);
#ifndef NOLOGOHACK
                if (logoScreenSaver)
                    DrawLogo(pWin);
#endif
                screenIsSaved = SCREEN_SAVER_ON;
            }
            /*
             * Call the DDX saver in case it wants to do something
             * at cycle time
             */
            else if (savedScreenInfo[i].blanked == SCREEN_IS_BLANKED) {
                (*screenInfo.screens[i]->SaveScreen) (screenInfo.screens[i],
                                                      type);
            }
            break;
        case SCREEN_SAVER_ON:
            if (ScreenSaverBlanking != DontPreferBlanking) {
                if ((*screenInfo.screens[i]->SaveScreen)
                    (screenInfo.screens[i], what)) {
                    savedScreenInfo[i].blanked = SCREEN_IS_BLANKED;
                    continue;
                }
                if ((ScreenSaverAllowExposures != DontAllowExposures) &&
                    TileScreenSaver(i, SCREEN_IS_BLACK)) {
                    savedScreenInfo[i].blanked = SCREEN_IS_BLACK;
                    continue;
                }
            }
            if ((ScreenSaverAllowExposures != DontAllowExposures) &&
                TileScreenSaver(i, SCREEN_IS_TILED)) {
                savedScreenInfo[i].blanked = SCREEN_IS_TILED;
            }
            else
                savedScreenInfo[i].blanked = SCREEN_ISNT_SAVED;
            break;
        }
    }
    screenIsSaved = what;
    if (mode == ScreenSaverReset)
        SetScreenSaverTimer();
}

static Bool
TileScreenSaver(int i, int kind)
{
    int j;

    int result;

    XID attributes[3];

    Mask mask;

    WindowPtr pWin;

    CursorMetricRec cm;

    unsigned char *srcbits, *mskbits;

    CursorPtr cursor;

    XID cursorID = 0;

    int attri;

    mask = 0;
    attri = 0;
    switch (kind) {
    case SCREEN_IS_TILED:
        switch (WindowTable[i]->backgroundState) {
        case BackgroundPixel:
            attributes[attri++] = WindowTable[i]->background.pixel;
            mask |= CWBackPixel;
            break;
        case BackgroundPixmap:
            attributes[attri++] = None;
            mask |= CWBackPixmap;
            break;
        default:
            break;
        }
        break;
    case SCREEN_IS_BLACK:
        attributes[attri++] = WindowTable[i]->drawable.pScreen->blackPixel;
        mask |= CWBackPixel;
        break;
    }
    mask |= CWOverrideRedirect;
    attributes[attri++] = xTrue;

    /*
     * create a blank cursor
     */

    cm.width = 16;
    cm.height = 16;
    cm.xhot = 8;
    cm.yhot = 8;
    srcbits = malloc(BitmapBytePad(32) * 16);
    mskbits = malloc(BitmapBytePad(32) * 16);
    if (!srcbits || !mskbits) {
        free(srcbits);
        free(mskbits);
        cursor = 0;
    }
    else {
        for (j = 0; j < BitmapBytePad(32) * 16; j++)
            srcbits[j] = mskbits[j] = 0x0;
        cursor = AllocCursor(srcbits, mskbits, &cm, 0, 0, 0, 0, 0, 0);
        if (cursor) {
            cursorID = FakeClientID(0);
            if (AddResource(cursorID, RT_CURSOR, (pointer) cursor)) {
                attributes[attri] = cursorID;
                mask |= CWCursor;
            }
            else
                cursor = 0;
        }
        else {
            free(srcbits);
            free(mskbits);
        }
    }

    pWin = savedScreenInfo[i].pWindow =
        CreateWindow(savedScreenInfo[i].wid,
                     WindowTable[i],
                     -RANDOM_WIDTH, -RANDOM_WIDTH,
                     (unsigned short) screenInfo.screens[i]->width +
                     RANDOM_WIDTH,
                     (unsigned short) screenInfo.screens[i]->height +
                     RANDOM_WIDTH, 0, InputOutput, mask, attributes, 0,
                     serverClient, wVisual(WindowTable[i]), &result);

    if (cursor)
        FreeResource(cursorID, RT_NONE);

    if (!pWin)
        return FALSE;

    if (!AddResource(pWin->drawable.id, RT_WINDOW,
                     (pointer) savedScreenInfo[i].pWindow))
        return FALSE;

    if (mask & CWBackPixmap) {
        MakeRootTile(pWin);
        (*pWin->drawable.pScreen->ChangeWindowAttributes) (pWin, CWBackPixmap);
    }
    MapWindow(pWin, serverClient);
#ifndef NOLOGOHACK
    if (kind == SCREEN_IS_TILED && logoScreenSaver)
        DrawLogo(pWin);
#endif
    return TRUE;
}

/*
 * FindWindowWithOptional
 *
 * search ancestors of the given window for an entry containing
 * a WindowOpt structure.  Assumptions:	 some parent will
 * contain the structure.
 */

_X_EXPORT WindowPtr
FindWindowWithOptional(register WindowPtr w)
{
    do
        w = w->parent;
    while (!w->optional);
    return w;
}

/*
 * CheckWindowOptionalNeed
 *
 * check each optional entry in the given window to see if
 * the value is satisfied by the default rules.	 If so,
 * release the optional record
 */

_X_EXPORT void
CheckWindowOptionalNeed(register WindowPtr w)
{
    WindowOptPtr optional;

    WindowOptPtr parentOptional;

    if (!w->parent)
        return;
    optional = w->optional;
    if (optional->dontPropagateMask != DontPropagateMasks[w->dontPropagate])
        return;
    if (optional->otherEventMasks != 0)
        return;
    if (optional->otherClients != NULL)
        return;
    if (optional->passiveGrabs != NULL)
        return;
    if (optional->userProps != NULL)
        return;
    if (optional->backingBitPlanes != ~0L)
        return;
    if (optional->backingPixel != 0)
        return;
    if (optional->boundingShape != NULL)
        return;
    if (optional->clipShape != NULL)
        return;
    if (optional->inputShape != NULL)
        return;
    parentOptional = FindWindowWithOptional(w)->optional;
    if (optional->visual != parentOptional->visual)
        return;
    if (optional->cursor != None &&
        (optional->cursor != parentOptional->cursor || w->parent->cursorIsNone))
        return;
    if (optional->colormap != parentOptional->colormap)
        return;
    DisposeWindowOptional(w);
}

/*
 * MakeWindowOptional
 *
 * create an optional record and initialize it with the default
 * values.
 */

_X_EXPORT Bool
MakeWindowOptional(register WindowPtr pWin)
{
    WindowOptPtr optional;

    WindowOptPtr parentOptional;

    if (pWin->optional)
        return TRUE;
    optional = malloc(sizeof(WindowOptRec));
    if (!optional)
        return FALSE;
    optional->dontPropagateMask = DontPropagateMasks[pWin->dontPropagate];
    optional->otherEventMasks = 0;
    optional->otherClients = NULL;
    optional->passiveGrabs = NULL;
    optional->userProps = NULL;
    optional->backingBitPlanes = ~0L;
    optional->backingPixel = 0;
    optional->boundingShape = NULL;
    optional->clipShape = NULL;
    optional->inputShape = NULL;
    parentOptional = FindWindowWithOptional(pWin)->optional;
    optional->visual = parentOptional->visual;
    if (!pWin->cursorIsNone) {
        optional->cursor = parentOptional->cursor;
        optional->cursor->refcnt++;
    }
    else {
        optional->cursor = None;
    }
    optional->colormap = parentOptional->colormap;
    pWin->optional = optional;
    return TRUE;
}

void
DisposeWindowOptional(register WindowPtr pWin)
{
    if (!pWin->optional)
        return;
    /*
     * everything is peachy.  Delete the optional record
     * and clean up
     */
    /*
     * TOG changed this code to:
     *
     *      if (pWin->cursorIsNone == FALSE)
     *          FreeCursor (pWin->optional->cursor, (Cursor)0);
     *      pWin->cursorIsNone = TRUE;
     *
     * This is blatently wrong; windows without optionals can have
     * two different cursor values, either None or sharing their
     * parents cursor.  This difference is controlled by the
     * cursorIsNone value; when TRUE, the window has no cursor,
     * when false, it shares its cursor with its parent; TOG
     * made it impossible for a window to have a cursor without
     * an optional record.
     */
    if (pWin->optional->cursor) {
        FreeCursor(pWin->optional->cursor, (Cursor) 0);
        pWin->cursorIsNone = FALSE;
    }
    else
        pWin->cursorIsNone = TRUE;
    free(pWin->optional);
    pWin->optional = NULL;
}

#ifndef NOLOGOHACK
static void
DrawLogo(WindowPtr pWin)
{
    DrawablePtr pDraw;

    ScreenPtr pScreen;

    int x, y;

    unsigned int width, height, size;

    GC *pGC;

    int thin, gap, d31;

    DDXPointRec poly[4];

    ChangeGCVal fore[2], back[2];

    xrgb rgb[2];

    BITS32 fmask, bmask;

    ColormapPtr cmap;

    pDraw = (DrawablePtr) pWin;
    pScreen = pDraw->pScreen;
    x = -pWin->origin.x;
    y = -pWin->origin.y;
    width = pScreen->width;
    height = pScreen->height;
    pGC = GetScratchGC(pScreen->rootDepth, pScreen);
    if (!pGC)
        return;

    if ((rand() % 100) <= 17)   /* make the probability for white fairly low */
        fore[0].val = pScreen->whitePixel;
    else
        fore[0].val = pScreen->blackPixel;
    if ((pWin->backgroundState == BackgroundPixel) &&
        (cmap = (ColormapPtr) LookupIDByType(wColormap(pWin), RT_COLORMAP))) {
        Pixel querypixels[2];

        querypixels[0] = fore[0].val;
        querypixels[1] = pWin->background.pixel;
        QueryColors(cmap, 2, querypixels, rgb);
        if ((rgb[0].red == rgb[1].red) &&
            (rgb[0].green == rgb[1].green) && (rgb[0].blue == rgb[1].blue)) {
            if (fore[0].val == pScreen->blackPixel)
                fore[0].val = pScreen->whitePixel;
            else
                fore[0].val = pScreen->blackPixel;
        }
    }
    fore[1].val = FillSolid;
    fmask = GCForeground | GCFillStyle;
    if (pWin->backgroundState == BackgroundPixel) {
        back[0].val = pWin->background.pixel;
        back[1].val = FillSolid;
        bmask = GCForeground | GCFillStyle;
    }
    else {
        back[0].val = 0;
        back[1].val = 0;
        dixChangeGC(NullClient, pGC, GCTileStipXOrigin | GCTileStipYOrigin,
                    NULL, back);
        back[0].val = FillTiled;
        back[1].ptr = pWin->background.pixmap;
        bmask = GCFillStyle | GCTile;
    }

    /* should be the same as the reference function XmuDrawLogo() */

    size = width;
    if (height < width)
        size = height;
    size = RANDOM_WIDTH + rand() % (size - RANDOM_WIDTH);
    size &= ~1;
    x += rand() % (width - size);
    y += rand() % (height - size);

/*
 * Draw what will be the thin strokes.
 *
 *           -----
 *          /    /
 *         /    /
 *        /    /
 *       /    /
 *      /____/
 *           d
 *
 * Point d is 9/44 (~1/5) of the way across.
 */

    thin = (size / 11);
    if (thin < 1)
        thin = 1;
    gap = (thin + 3) / 4;
    d31 = thin + thin + gap;
    poly[0].x = x + size;
    poly[0].y = y;
    poly[1].x = x + size - d31;
    poly[1].y = y;
    poly[2].x = x + 0;
    poly[2].y = y + size;
    poly[3].x = x + d31;
    poly[3].y = y + size;
    dixChangeGC(NullClient, pGC, fmask, NULL, fore);
    ValidateGC(pDraw, pGC);
    (*pGC->ops->FillPolygon) (pDraw, pGC, Convex, CoordModeOrigin, 4, poly);

/*
 * Erase area not needed for lower thin stroke.
 *
 *           ------
 *          /	  /
 *         /  __ /
 *        /  /	/
 *       /  /  /
 *      /__/__/
 */

    poly[0].x = x + d31 / 2;
    poly[0].y = y + size;
    poly[1].x = x + size / 2;
    poly[1].y = y + size / 2;
    poly[2].x = x + (size / 2) + (d31 - (d31 / 2));
    poly[2].y = y + size / 2;
    poly[3].x = x + d31;
    poly[3].y = y + size;
    dixChangeGC(NullClient, pGC, bmask, NULL, back);
    ValidateGC(pDraw, pGC);
    (*pGC->ops->FillPolygon) (pDraw, pGC, Convex, CoordModeOrigin, 4, poly);

/*
 * Erase area not needed for upper thin stroke.
 *
 *	     ------
 *	    /  /  /
 *	   /--/	 /
 *	  /	/
 *	 /     /
 *	/_____/
 */

    poly[0].x = x + size - d31 / 2;
    poly[0].y = y;
    poly[1].x = x + size / 2;
    poly[1].y = y + size / 2;
    poly[2].x = x + (size / 2) - (d31 - (d31 / 2));
    poly[2].y = y + size / 2;
    poly[3].x = x + size - d31;
    poly[3].y = y;
    ValidateGC(pDraw, pGC);
    (*pGC->ops->FillPolygon) (pDraw, pGC, Convex, CoordModeOrigin, 4, poly);

/*
 * Draw thick stroke.
 * Point b is 1/4 of the way across.
 *
 *      b
 * -----
 * \	\
 *  \	 \
 *   \	  \
 *    \	   \
 *     \____\
 */

    poly[0].x = x;
    poly[0].y = y;
    poly[1].x = x + size / 4;
    poly[1].y = y;
    poly[2].x = x + size;
    poly[2].y = y + size;
    poly[3].x = x + size - size / 4;
    poly[3].y = y + size;
    dixChangeGC(NullClient, pGC, fmask, NULL, fore);
    ValidateGC(pDraw, pGC);
    (*pGC->ops->FillPolygon) (pDraw, pGC, Convex, CoordModeOrigin, 4, poly);

/*
 * Erase to create gap.
 *
 *	    /
 *	   /
 *	  /
 *	 /
 *	/
 */

    poly[0].x = x + size - thin;
    poly[0].y = y;
    poly[1].x = x + size - (thin + gap);
    poly[1].y = y;
    poly[2].x = x + thin;
    poly[2].y = y + size;
    poly[3].x = x + thin + gap;
    poly[3].y = y + size;
    dixChangeGC(NullClient, pGC, bmask, NULL, back);
    ValidateGC(pDraw, pGC);
    (*pGC->ops->FillPolygon) (pDraw, pGC, Convex, CoordModeOrigin, 4, poly);

    FreeScratchGC(pGC);
}

#endif