window.c

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	    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;
	    }
	}
    }

    return( pFirstChange );
}

RegionPtr
CreateUnclippedWinSize (pWin)
    register WindowPtr	 pWin;
{
    RegionPtr	pRgn;
    BoxRec	box;

    box.x1 = pWin->drawable.x;
    box.y1 = pWin->drawable.y;
    box.x2 = pWin->drawable.x + (int) pWin->drawable.width;
    box.y2 = pWin->drawable.y + (int) pWin->drawable.height;
    pRgn = REGION_CREATE(pWin->drawable.pScreen, &box, 1);
#ifdef SHAPE
    if (wBoundingShape (pWin) || wClipShape (pWin)) {
	REGION_PTR(pScreen, pWin)

	REGION_TRANSLATE(pScreen, pRgn, - pWin->drawable.x,
			 - pWin->drawable.y);
	if (wBoundingShape (pWin))
	    REGION_INTERSECT(pScreen, pRgn, pRgn, wBoundingShape (pWin));
	if (wClipShape (pWin))
	    REGION_INTERSECT(pScreen, pRgn, pRgn, wClipShape (pWin));
	REGION_TRANSLATE(pScreen, pRgn, pWin->drawable.x, pWin->drawable.y);
    }
#endif
    return pRgn;
}

void
SetWinSize (pWin)
    register WindowPtr pWin;
{
    ClippedRegionFromBox(pWin->parent, &pWin->winSize,
			 pWin->drawable.x, pWin->drawable.y,
			 (int)pWin->drawable.width,
			 (int)pWin->drawable.height);
#ifdef SHAPE
    if (wBoundingShape (pWin) || wClipShape (pWin)) {
	REGION_PTR(pScreen, pWin)

	REGION_TRANSLATE(pScreen, &pWin->winSize, - pWin->drawable.x,
			 - pWin->drawable.y);
	if (wBoundingShape (pWin))
	    REGION_INTERSECT(pScreen, &pWin->winSize, &pWin->winSize,
			     wBoundingShape (pWin));
	if (wClipShape (pWin))
	    REGION_INTERSECT(pScreen, &pWin->winSize, &pWin->winSize,
			     wClipShape (pWin));
	REGION_TRANSLATE(pScreen, &pWin->winSize, pWin->drawable.x,
			 pWin->drawable.y);
    }
#endif
}

void
SetBorderSize (pWin)
    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)));
#ifdef SHAPE
	if (wBoundingShape (pWin)) {
	    REGION_PTR(pScreen, pWin)

	    REGION_TRANSLATE(pScreen, &pWin->borderSize, - pWin->drawable.x,
			     - pWin->drawable.y);
	    REGION_INTERSECT(pScreen, &pWin->borderSize, &pWin->borderSize,
			     wBoundingShape (pWin));
	    REGION_TRANSLATE(pScreen, &pWin->borderSize, pWin->drawable.x,
			     pWin->drawable.y);
	    REGION_UNION(pScreen, &pWin->borderSize, &pWin->borderSize,
			 &pWin->winSize);
	}
#endif
    } else {
	REGION_COPY(pWin->drawable.pScreen, &pWin->borderSize,
					       &pWin->winSize);
    }
}

void
GravityTranslate (x, y, oldx, oldy, dw, dh, gravity, destx, desty)
    register int x, y;		/* new window position */
    int		oldx, oldy;	/* old window position */
    int		dw, dh;
    unsigned	gravity;
    register int *destx, *desty;	/* position relative to gravity */
{
    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 */
void
ResizeChildrenWinSize(pWin, dx, dy, dw, dh)
    register WindowPtr pWin;
    int dx, dy, dw, dh;
{
    register ScreenPtr pScreen;
    register 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
#if NeedFunctionPrototypes
IsSiblingAboveMe(
    register WindowPtr pMe,
    register WindowPtr pSib)
#else
IsSiblingAboveMe(pMe, pSib)
    register WindowPtr pMe, pSib;
#endif
{
    register 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
#if NeedFunctionPrototypes
WindowExtents(
    register WindowPtr pWin,
    register BoxPtr pBox)
#else
WindowExtents(pWin, pBox)
    register WindowPtr pWin;
    register BoxPtr pBox;
#endif
{
    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);
}

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

static RegionPtr
#if NeedFunctionPrototypes
MakeBoundingRegion (
    register WindowPtr	pWin,
    BoxPtr	pBox)
#else
MakeBoundingRegion (pWin, pBox)
    register WindowPtr	pWin;
    BoxPtr	pBox;
#endif
{
    RegionPtr	pRgn;
    REGION_PTR(pScreen, pWin)

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

static Bool
#if NeedFunctionPrototypes
ShapeOverlap (
    WindowPtr	pWin,
    BoxPtr	pWinBox,
    WindowPtr	pSib,
    BoxPtr	pSibBox)
#else
ShapeOverlap (pWin, pWinBox, pSib, pSibBox)
    WindowPtr	pWin, pSib;
    BoxPtr	pWinBox, pSibBox;
#endif
{
    RegionPtr	pWinRgn, pSibRgn;
    register ScreenPtr	pScreen;
    Bool	ret;

    if (!IS_SHAPED(pWin) && !IS_SHAPED(pSib))
	return TRUE;
    pScreen = pWin->drawable.pScreen;
    pWinRgn = MakeBoundingRegion (pWin, pWinBox);
    pSibRgn = MakeBoundingRegion (pSib, pSibBox);
    REGION_INTERSECT(pScreen, pWinRgn, pWinRgn, pSibRgn);
    ret = REGION_NOTEMPTY(pScreen, pWinRgn);
    REGION_DESTROY(pScreen, pWinRgn);
    REGION_DESTROY(pScreen, pSibRgn);
    return ret;
}
#endif

static Bool
#if NeedFunctionPrototypes
AnyWindowOverlapsMe(
    WindowPtr pWin,
    WindowPtr pHead,
    register BoxPtr box)
#else
AnyWindowOverlapsMe(pWin, pHead, box)
    WindowPtr pWin, pHead;
    register BoxPtr box;
#endif
{
    register WindowPtr pSib;
    BoxRec sboxrec;
    register BoxPtr sbox;

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

static Bool
#if NeedFunctionPrototypes
IOverlapAnyWindow(
    WindowPtr pWin,
    register BoxPtr box)
#else
IOverlapAnyWindow(pWin, box)
    WindowPtr pWin;
    register BoxPtr box;
#endif
{
    register WindowPtr pSib;
    BoxRec sboxrec;
    register BoxPtr sbox;

    for (pSib = pWin->nextSib; pSib; pSib = pSib->nextSib)
    {
	if (pSib->mapped)
	{
	    sbox = WindowExtents(pSib, &sboxrec);
	    if (BOXES_OVERLAP(sbox, box)
#ifdef SHAPE
	    && ShapeOverlap (pWin, box, pSib, sbox)
#endif
	    )
		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
#if NeedFunctionPrototypes
WhereDoIGoInTheStack(
    register WindowPtr pWin,
    register WindowPtr pSib,
    short x,
    short y,
    unsigned short w,
    unsigned short h,
    int smode)
#else
WhereDoIGoInTheStack(pWin, pSib, x, y, w, h, smode)
    register WindowPtr pWin, pSib;
    short x, y;
    unsigned short w, h;
    int smode;
#endif
{
    BoxRec box;
    register ScreenPtr pScreen;
    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;
    pScreen = pWin->drawable.pScreen;
    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);