miwindow.c

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		(* MarkWindow)(pChild);
		if (pChild->firstChild)
		{
		    pChild = pChild->firstChild;
		    continue;
		}
	    }
	    while (!pChild->nextSib && (pChild != pWin))
		pChild = pChild->parent;
	    if (pChild == pWin)
		break;
	    pChild = pChild->nextSib;
	}
	anyMarked = TRUE;
	pFirst = pFirst->nextSib;
    }
    if ( (pChild = pFirst) )
    {
	box = REGION_EXTENTS(pChild->drawable.pScreen, &pWin->borderSize);
	pLast = pChild->parent->lastChild;
	while (1)
	{
	    if (pChild->viewable && RECT_IN_REGION(pScreen, &pChild->borderSize,
						       box))
	    {
		(* MarkWindow)(pChild);
		anyMarked = TRUE;
		if (pChild->firstChild)
		{
		    pChild = pChild->firstChild;
		    continue;
		}
	    }
	    while (!pChild->nextSib && (pChild != pLast))
		pChild = pChild->parent;
	    if (pChild == pLast)
		break;
	    pChild = pChild->nextSib;
	}
    }
    if (anyMarked)
	(* MarkWindow)(pWin->parent);
    return anyMarked;
}

/*****
 *  miHandleValidateExposures(pWin)
 *    starting at pWin, draw background in any windows that have exposure
 *    regions, translate the regions, restore any backing store,
 *    and then send any regions still exposed to the client
 *****/
void
miHandleValidateExposures(pWin)
    WindowPtr pWin;
{
    register WindowPtr pChild;
    register ValidatePtr val;
    ScreenPtr pScreen = pWin->drawable.pScreen;
    void (* WindowExposures)();

    pChild = pWin;
    WindowExposures = pChild->drawable.pScreen->WindowExposures;
    while (1)
    {
	if ( (val = pChild->valdata) )
	{
	    if (REGION_NOTEMPTY(pScreen, &val->after.borderExposed))
		(*pChild->drawable.pScreen->PaintWindowBorder)(pChild,
						    &val->after.borderExposed,
						    PW_BORDER);
	    REGION_UNINIT(pScreen, &val->after.borderExposed);
	    (*WindowExposures)(pChild, &val->after.exposed, NullRegion);
	    REGION_UNINIT(pScreen, &val->after.exposed);
	    xfree(val);
	    pChild->valdata = (ValidatePtr)NULL;
	    if (pChild->firstChild)
	    {
		pChild = pChild->firstChild;
		continue;
	    }
	}
	while (!pChild->nextSib && (pChild != pWin))
	    pChild = pChild->parent;
	if (pChild == pWin)
	    break;
	pChild = pChild->nextSib;
    }
}

void
miMoveWindow(pWin, x, y, pNextSib, kind)
    register WindowPtr pWin;
    int x,y;
    WindowPtr pNextSib;
    VTKind kind;
{
    WindowPtr pParent;
    Bool WasViewable = (Bool)(pWin->viewable);
    short bw;
    RegionPtr oldRegion;
    DDXPointRec oldpt;
    Bool anyMarked;
    register ScreenPtr pScreen;
    WindowPtr windowToValidate;
#ifdef DO_SAVE_UNDERS
    Bool dosave = FALSE;
#endif
    WindowPtr pLayerWin;

    /* if this is a root window, can't be moved */
    if (!(pParent = pWin->parent))
       return ;
    pScreen = pWin->drawable.pScreen;
    bw = wBorderWidth (pWin);

    oldpt.x = pWin->drawable.x;
    oldpt.y = pWin->drawable.y;
    if (WasViewable)
    {
	oldRegion = REGION_CREATE(pScreen, NullBox, 1);
	REGION_COPY(pScreen, oldRegion, &pWin->borderClip);
	anyMarked = (*pScreen->MarkOverlappedWindows)(pWin, pWin, &pLayerWin);
    }
    pWin->origin.x = x + (int)bw;
    pWin->origin.y = y + (int)bw;
    x = pWin->drawable.x = pParent->drawable.x + x + (int)bw;
    y = pWin->drawable.y = pParent->drawable.y + y + (int)bw;

    SetWinSize (pWin);
    SetBorderSize (pWin);

    (*pScreen->PositionWindow)(pWin, x, y);

    windowToValidate = MoveWindowInStack(pWin, pNextSib);

    ResizeChildrenWinSize(pWin, x - oldpt.x, y - oldpt.y, 0, 0);

    if (WasViewable)
    {
	if (pLayerWin == pWin)
	    anyMarked |= (*pScreen->MarkOverlappedWindows)
				(pWin, windowToValidate, (WindowPtr *)NULL);
	else
	    anyMarked |= (*pScreen->MarkOverlappedWindows)
				(pWin, pLayerWin, (WindowPtr *)NULL);

#ifdef DO_SAVE_UNDERS
	if (DO_SAVE_UNDERS(pWin))
	{
	    dosave = (*pScreen->ChangeSaveUnder)(pLayerWin, windowToValidate);
	}
#endif /* DO_SAVE_UNDERS */

	if (anyMarked)
	{
	    (*pScreen->ValidateTree)(pLayerWin->parent, NullWindow, kind);
	    (* pWin->drawable.pScreen->CopyWindow)(pWin, oldpt, oldRegion);
	    REGION_DESTROY(pScreen, oldRegion);
	    /* XXX need to retile border if ParentRelative origin */
	    (*pScreen->HandleExposures)(pLayerWin->parent);
	}
#ifdef DO_SAVE_UNDERS
	if (dosave)
	    (*pScreen->PostChangeSaveUnder)(pLayerWin, windowToValidate);
#endif /* DO_SAVE_UNDERS */
	if (anyMarked && pScreen->PostValidateTree)
	    (*pScreen->PostValidateTree)(pLayerWin->parent, NullWindow, kind);
    }
    if (pWin->realized)
	WindowsRestructured ();
}


/*
 * pValid is a region of the screen which has been
 * successfully copied -- recomputed exposed regions for affected windows
 */

static int
miRecomputeExposures (pWin, value)
    register WindowPtr	pWin;
    pointer		value; /* must conform to VisitWindowProcPtr */
{
    register ScreenPtr	pScreen;
    RegionPtr	pValid = (RegionPtr)value;

    if (pWin->valdata)
    {
	pScreen = pWin->drawable.pScreen;
	/*
	 * compute exposed regions of this window
	 */
	REGION_SUBTRACT(pScreen, &pWin->valdata->after.exposed,
			&pWin->clipList, pValid);
	/*
	 * compute exposed regions of the border
	 */
	REGION_SUBTRACT(pScreen, &pWin->valdata->after.borderExposed,
			     &pWin->borderClip, &pWin->winSize);
	REGION_SUBTRACT(pScreen, &pWin->valdata->after.borderExposed,
			     &pWin->valdata->after.borderExposed, pValid);
	return WT_WALKCHILDREN;
    }
    return WT_NOMATCH;
}

void
miSlideAndSizeWindow(pWin, x, y, w, h, pSib)
    register WindowPtr pWin;
    int x,y;
    unsigned int w, h;
    WindowPtr pSib;
{
    WindowPtr pParent;
    Bool WasViewable = (Bool)(pWin->viewable);
    unsigned short width = pWin->drawable.width,
		   height = pWin->drawable.height;
    short oldx = pWin->drawable.x,
	  oldy = pWin->drawable.y;
    int bw = wBorderWidth (pWin);
    short dw, dh;
    DDXPointRec oldpt;
    RegionPtr oldRegion;
    Bool anyMarked;
    register ScreenPtr pScreen;
    WindowPtr pFirstChange;
    register WindowPtr pChild;
    RegionPtr	gravitate[StaticGravity + 1];
    register unsigned g;
    int		nx, ny;		/* destination x,y */
    int		newx, newy;	/* new inner window position */
    RegionPtr	pRegion;
    RegionPtr	destClip;	/* portions of destination already written */
    RegionPtr	oldWinClip;	/* old clip list for window */
    RegionPtr	borderVisible = NullRegion; /* visible area of the border */
    RegionPtr	bsExposed = NullRegion;	    /* backing store exposures */
    Bool	shrunk = FALSE; /* shrunk in an inner dimension */
    Bool	moved = FALSE;	/* window position changed */
#ifdef DO_SAVE_UNDERS
    Bool	dosave = FALSE;
#endif
    WindowPtr  pLayerWin;

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

    pScreen = pWin->drawable.pScreen;
    newx = pParent->drawable.x + x + bw;
    newy = pParent->drawable.y + y + bw;
    if (WasViewable)
    {
	anyMarked = FALSE;
	/*
	 * save the visible region of the window
	 */
	oldRegion = REGION_CREATE(pScreen, NullBox, 1);
	REGION_COPY(pScreen, oldRegion, &pWin->winSize);

	/*
	 * categorize child windows into regions to be moved
	 */
	for (g = 0; g <= StaticGravity; g++)
	    gravitate[g] = (RegionPtr) NULL;
	for (pChild = pWin->firstChild; pChild; pChild = pChild->nextSib)
	{
	    g = pChild->winGravity;
	    if (g != UnmapGravity)
	    {
		if (!gravitate[g])
		    gravitate[g] = REGION_CREATE(pScreen, NullBox, 1);
		REGION_UNION(pScreen, gravitate[g],
				   gravitate[g], &pChild->borderClip);
	    }
	    else
	    {
		UnmapWindow(pChild, TRUE);
		anyMarked = TRUE;
	    }
	}
	anyMarked |= (*pScreen->MarkOverlappedWindows)(pWin, pWin, 
						       &pLayerWin);

	oldWinClip = NULL;
	if (pWin->bitGravity != ForgetGravity)
	{
	    oldWinClip = REGION_CREATE(pScreen, NullBox, 1);
	    REGION_COPY(pScreen, oldWinClip, &pWin->clipList);
	}
	/*
	 * if the window is changing size, borderExposed
	 * can't be computed correctly without some help.
	 */
	if (pWin->drawable.height > h || pWin->drawable.width > w)
	    shrunk = TRUE;

	if (newx != oldx || newy != oldy)
	    moved = TRUE;

	if ((pWin->drawable.height != h || pWin->drawable.width != w) &&
	    HasBorder (pWin))
	{
	    borderVisible = REGION_CREATE(pScreen, NullBox, 1);
	    /* for tiled borders, we punt and draw the whole thing */
	    if (pWin->borderIsPixel || !moved)
	    {
		if (shrunk || moved)
		    REGION_SUBTRACT(pScreen, borderVisible,
					  &pWin->borderClip,
					  &pWin->winSize);
		else
		    REGION_COPY(pScreen, borderVisible,
					    &pWin->borderClip);
	    }
	}
    }
    pWin->origin.x = x + bw;
    pWin->origin.y = y + bw;
    pWin->drawable.height = h;
    pWin->drawable.width = w;

    x = pWin->drawable.x = newx;
    y = pWin->drawable.y = newy;

    SetWinSize (pWin);
    SetBorderSize (pWin);

    dw = (int)w - (int)width;
    dh = (int)h - (int)height;
    ResizeChildrenWinSize(pWin, x - oldx, y - oldy, dw, dh);

    /* let the hardware adjust background and border pixmaps, if any */
    (*pScreen->PositionWindow)(pWin, x, y);

    pFirstChange = MoveWindowInStack(pWin, pSib);

    if (WasViewable)
    {
	pRegion = REGION_CREATE(pScreen, NullBox, 1);
	if (pWin->backStorage)
	    REGION_COPY(pScreen, pRegion, &pWin->clipList);

	if (pLayerWin == pWin)
	    anyMarked |= (*pScreen->MarkOverlappedWindows)(pWin, pFirstChange,
						(WindowPtr *)NULL);
	else
	    anyMarked |= (*pScreen->MarkOverlappedWindows)(pWin, pLayerWin,
						(WindowPtr *)NULL);

	if (pWin->valdata)
	{
	    pWin->valdata->before.resized = TRUE;
	    pWin->valdata->before.borderVisible = borderVisible;
	}

#ifdef DO_SAVE_UNDERS
	if (DO_SAVE_UNDERS(pWin))
	{
	    dosave = (*pScreen->ChangeSaveUnder)(pLayerWin, pFirstChange);
	}
#endif /* DO_SAVE_UNDERS */

	if (anyMarked)
	    (*pScreen->ValidateTree)(pLayerWin->parent, pFirstChange, VTOther);
	/*
	 * the entire window is trashed unless bitGravity
	 * recovers portions of it
	 */
	REGION_COPY(pScreen, &pWin->valdata->after.exposed, &pWin->clipList);
    }

    GravityTranslate (x, y, oldx, oldy, dw, dh, pWin->bitGravity, &nx, &ny);

    if (pWin->backStorage &&
	((pWin->backingStore == Always) || WasViewable))
    {
	if (!WasViewable)
	    pRegion = &pWin->clipList; /* a convenient empty region */
	if (pWin->bitGravity == ForgetGravity)
	    bsExposed = (*pScreen->TranslateBackingStore)
				(pWin, 0, 0, NullRegion, oldx, oldy);
	else