window.c

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    REGION_INTERSECT(pScreen, Rgn, Rgn, &pWin->winSize);
}

WindowPtr
RealChildHead(pWin)
    register WindowPtr 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 
 *****/

WindowPtr
CreateWindow(wid, pParent, x, y, w, h, bw, class, vmask, vlist,
	     depth, client, visual, error)
    Window wid;
    register WindowPtr pParent;
    int x,y;
    unsigned int w, h, bw;
    unsigned int class;
    register Mask vmask;
    XID *vlist;
    int depth;
    ClientPtr client;
    VisualID visual;
    int *error;
{
    register WindowPtr pWin;
    WindowPtr pHead;
    register ScreenPtr pScreen;
    xEvent event;
    int idepth, ivisual;
    Bool fOK;
    DepthPtr pDepth;
    PixmapFormatRec *format;
    register 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) {
#ifdef XAPPGROUP
	VisualID ag_visual;

	if (client->appgroup && !pParent->parent &&
	    (ag_visual = XagRootVisual (client)))
	    visual = ag_visual;
	else
#endif
	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))
	{
	    xfree (pWin);
	    *error = BadAlloc;
	    return NullWindow;
	}
	pWin->optional->visual = visual;
	pWin->optional->colormap = None;
    }

    pWin->borderWidth = bw;
#ifdef XCSECURITY
    /*  can't let untrusted clients have background None windows;
     *  they make it too easy to steal window contents
     */
    if (client->trustLevel != XSecurityClientTrusted)
    {
	pWin->backgroundState = BackgroundPixel;
	pWin->background.pixel = 0;
    }
    else
#endif
    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_INIT(pScreen, &pWin->clipList, NullBox, 1);
    REGION_INIT(pScreen, &pWin->borderClip, NullBox, 1);
    REGION_INIT(pScreen, &pWin->winSize, NullBox, 1);
    REGION_INIT(pScreen, &pWin->borderSize, NullBox, 1);

    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
#if NeedFunctionPrototypes
FreeWindowResources(register WindowPtr pWin)
#else
FreeWindowResources(pWin)
    register WindowPtr pWin;
#endif
{
    register ScreenPtr pScreen = pWin->drawable.pScreen;

    DeleteWindowFromAnySaveSet(pWin);
    DeleteWindowFromAnySelections(pWin);
    DeleteWindowFromAnyEvents(pWin, TRUE);
    REGION_UNINIT(pScreen, &pWin->clipList);
    REGION_UNINIT(pScreen, &pWin->winSize);
    REGION_UNINIT(pScreen, &pWin->borderClip);
    REGION_UNINIT(pScreen, &pWin->borderSize);
#ifdef SHAPE
    if (wBoundingShape (pWin))
	REGION_DESTROY(pScreen, wBoundingShape (pWin));
    if (wClipShape (pWin))
	REGION_DESTROY(pScreen, wClipShape (pWin));
#endif
    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
#if NeedFunctionPrototypes
CrushTree(WindowPtr pWin)
#else
CrushTree(pWin)
    WindowPtr pWin;
#endif
{
    register 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;
#ifdef DO_SAVE_UNDERS
	    if (pChild->saveUnder && pChild->viewable)
		deltaSaveUndersViewable--;
#endif
	    pChild->viewable = FALSE;
	    if (pChild->realized)
	    {
		pChild->realized = FALSE;
		(*UnrealizeWindow)(pChild);
	    }
	    FreeWindowResources(pChild);
	    xfree(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
 *****/

/*ARGSUSED*/
int
DeleteWindow(value, wid)
    pointer value;
    XID wid;
 {
    register WindowPtr pParent;
    register 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;
    }
    xfree(pWin);
    return Success;
}

/*ARGSUSED*/
void
DestroySubwindows(pWin, client)
    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.  
 *****/
 
int
ChangeWindowAttributes(pWin, vmask, vlist, client)
    register WindowPtr pWin;
    Mask vmask;
    XID *vlist;
    ClientPtr client;
{
    register Mask index2;
    register XID *pVlist;
    PixmapPtr pPixmap;
    Pixmap pixID;
    CursorPtr pCursor, pOldCursor;
    Cursor cursorID;
    WindowPtr pChild;
    Colormap cmap;
    ColormapPtr	pCmap;
    xEvent xE;
    int result;
    register ScreenPtr pScreen;
    Mask vmaskCopy = 0;
    register Mask tmask;
    unsigned int val;
    int error;
    Bool checkOptional = FALSE;
    Bool borderRelative = FALSE;
    WindowPtr pLayerWin;

    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)
	    {
#ifdef XCSECURITY
		/*  can't let untrusted clients have background None windows */
		if (client->trustLevel == XSecurityClientTrusted)
		{
#endif
		if (pWin->backgroundState == BackgroundPixmap)
		    (*pScreen->DestroyPixmap)(pWin->background.pixmap);
		if (!pWin->parent)
		    MakeRootTile(pWin);
		else
		    pWin->backgroundState = None;
#ifdef XCSECURITY
		}
		else
		{ /* didn't change the background to None, so don't tell ddx */
		    index2 = 0; 
		}
#endif
	    }
	    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