Initial revision

1 files changed, 1227 insertions, 0 deletions

diff --git a/mac/tkMacSubwindows.c b/mac/tkMacSubwindows.c
new file mode 100644
index 0000000..65c1a7e
--- /dev/null
+++ b/mac/tkMacSubwindows.c
@@ -0,0 +1,1227 @@
+/* 
+ * tkMacSubwindows.c --
+ *
+ *	Implements subwindows for the macintosh version of Tk.
+ *
+ * Copyright (c) 1995-1997 Sun Microsystems, Inc.
+ *
+ * See the file "license.terms" for information on usage and redistribution
+ * of this file, and for a DISCLAIMER OF ALL WARRANTIES.
+ *
+ * SCCS: @(#) tkMacSubwindows.c 1.81 97/10/29 11:46:54
+ */
+
+#include "tkInt.h"
+#include "X.h"
+#include "Xlib.h"
+#include <stdio.h>
+
+#include <Windows.h>
+#include <QDOffscreen.h>
+#include "tkMacInt.h"
+
+/*
+ * Temporary region that can be reused.
+ */
+static RgnHandle tmpRgn = NULL;
+
+static void UpdateOffsets _ANSI_ARGS_((TkWindow *winPtr, int deltaX, int deltaY));
+
+void MacMoveWindow _ANSI_ARGS_((WindowRef window, int x, int y));
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * XDestroyWindow --
+ *
+ *	Dealocates the given X Window.
+ *
+ * Results:
+ *	The window id is returned.
+ *
+ * Side effects:
+ *	None.
+ *
+ *----------------------------------------------------------------------
+ */
+
+void 
+XDestroyWindow(
+    Display* display,		/* Display. */
+    Window window)		/* Window. */
+{
+    MacDrawable *macWin = (MacDrawable *) window;
+    GWorldPtr destPort;
+
+    /*
+     * Remove any dangling pointers that may exist if
+     * the window we are deleting is being tracked by
+     * the grab code.
+     */
+
+    TkPointerDeadWindow(macWin->winPtr);
+    macWin->toplevel->referenceCount--;
+    
+    
+    if (Tk_IsTopLevel(macWin->winPtr)) {
+	DisposeRgn(macWin->clipRgn);
+	DisposeRgn(macWin->aboveClipRgn);
+	
+	/*
+	 * Delete the Mac window and remove it from the windowTable.
+	 * The window could be NULL if the window was never mapped.
+	 * However, we don't do this for embedded windows, they don't
+	 * go in the window list, and they do not own their portPtr's.
+	 */
+	 
+	if (!(Tk_IsEmbedded(macWin->winPtr))) {
+            destPort = TkMacGetDrawablePort(window);
+	    if (destPort != NULL) {
+	        TkMacWindowList *listPtr, *prevPtr;
+	    
+	        TkMacUnregisterMacWindow(destPort);
+	        DisposeWindow((WindowRef) destPort);
+	    
+	        for (listPtr = tkMacWindowListPtr, prevPtr = NULL;
+	    	        tkMacWindowListPtr != NULL;
+	    	        prevPtr = listPtr, listPtr = listPtr->nextPtr) {
+	            if (listPtr->winPtr == macWin->winPtr) {
+	                if (prevPtr == NULL) {
+	            	    tkMacWindowListPtr = listPtr->nextPtr;
+	                } else {
+	            	    prevPtr->nextPtr = listPtr->nextPtr;
+	                }
+	                ckfree((char *) listPtr);
+	                break;
+	            }
+	        }
+	    }
+	}
+	
+	macWin->portPtr = NULL;
+	
+	/*
+	 * Delay deletion of a toplevel data structure untill all
+	 * children have been deleted.
+	 */
+	if (macWin->toplevel->referenceCount == 0) {
+	    ckfree((char *) macWin->toplevel);
+	}
+    } else {
+        destPort = TkMacGetDrawablePort(window);
+	if (destPort != NULL) {
+	    SetGWorld(destPort, NULL);
+	    TkMacInvalidateWindow(macWin, TK_PARENT_WINDOW);
+	}
+	if (macWin->winPtr->parentPtr != NULL) {
+	    TkMacInvalClipRgns(macWin->winPtr->parentPtr);
+	}
+	DisposeRgn(macWin->clipRgn);
+	DisposeRgn(macWin->aboveClipRgn);
+	
+	if (macWin->toplevel->referenceCount == 0) {
+	    ckfree((char *) macWin->toplevel);
+	}
+	ckfree((char *) macWin);
+    }
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * XMapWindow --
+ *
+ *	Map the given X Window to the screen.  See X window documentation 
+ *  for more details.
+ *
+ * Results:
+ *	None.
+ *
+ * Side effects:
+ *	The subwindow or toplevel may appear on the screen.
+ *
+ *----------------------------------------------------------------------
+ */
+
+void 
+XMapWindow(
+    Display* display,		/* Display. */
+    Window window)		/* Window. */
+{
+    MacDrawable *macWin = (MacDrawable *) window;
+    XEvent event;
+    GWorldPtr destPort;
+
+    /*
+     * Under certain situations it's possible for this function to be
+     * called before the toplevel window it's associated with has actually
+     * been mapped.  In that case we need to create the real Macintosh
+     * window now as this function as well as other X functions assume that
+     * the portPtr is valid.
+     */
+    if (!TkMacHostToplevelExists(macWin->toplevel->winPtr)) {
+	TkMacMakeRealWindowExist(macWin->toplevel->winPtr);
+    }
+    destPort = TkMacGetDrawablePort(window);
+
+    display->request++;
+    macWin->winPtr->flags |= TK_MAPPED;
+    if (Tk_IsTopLevel(macWin->winPtr)) {
+	if (!Tk_IsEmbedded(macWin->winPtr)) {
+	    ShowWindow((WindowRef) destPort);
+	}
+
+	/* 
+	 * We only need to send the MapNotify event
+	 * for toplevel windows.
+	 */
+	event.xany.serial = display->request;
+	event.xany.send_event = False;
+	event.xany.display = display;
+	
+	event.xmap.window = window;
+	event.xmap.type = MapNotify;
+	event.xmap.event = window;
+	event.xmap.override_redirect = macWin->winPtr->atts.override_redirect;
+	Tk_QueueWindowEvent(&event, TCL_QUEUE_TAIL);
+    } else {
+	TkMacInvalClipRgns(macWin->winPtr->parentPtr);
+    }
+
+    /* 
+     * Generate damage for that area of the window 
+     */
+    SetGWorld(destPort, NULL);
+    TkMacUpdateClipRgn(macWin->winPtr);
+    TkMacInvalidateWindow(macWin, TK_PARENT_WINDOW);
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * XUnmapWindow --
+ *
+ *	Unmap the given X Window to the screen.  See X window
+ *	documentation for more details.
+ *
+ * Results:
+ *	None.
+ *
+ * Side effects:
+ *	The subwindow or toplevel may be removed from the screen.
+ *
+ *----------------------------------------------------------------------
+ */
+
+void 
+XUnmapWindow(
+    Display* display,		/* Display. */
+    Window window)		/* Window. */
+{
+    MacDrawable *macWin = (MacDrawable *) window;
+    XEvent event;
+    GWorldPtr destPort;
+
+    destPort = TkMacGetDrawablePort(window);
+
+    display->request++;
+    macWin->winPtr->flags &= ~TK_MAPPED;
+    if (Tk_IsTopLevel(macWin->winPtr)) {
+	if (!Tk_IsEmbedded(macWin->winPtr)) {
+	    HideWindow((WindowRef) destPort);
+	}
+
+	/* 
+	 * We only need to send the UnmapNotify event
+	 * for toplevel windows.
+	 */
+	event.xany.serial = display->request;
+	event.xany.send_event = False;
+	event.xany.display = display;
+	
+	event.xunmap.type = UnmapNotify;
+	event.xunmap.window = window;
+	event.xunmap.event = window;
+	event.xunmap.from_configure = false;
+	Tk_QueueWindowEvent(&event, TCL_QUEUE_TAIL);
+    } else {
+	/* 
+	 * Generate damage for that area of the window.
+	 */
+	SetGWorld(destPort, NULL);
+	TkMacInvalidateWindow(macWin, TK_PARENT_WINDOW); /* TODO: may not be valid */
+	TkMacInvalClipRgns(macWin->winPtr->parentPtr);
+    }
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * XResizeWindow --
+ *
+ *	Resize a given X window.  See X windows documentation for
+ *	further details.
+ *
+ * Results:
+ *	None.
+ *
+ * Side effects:
+ *	None.
+ *
+ *----------------------------------------------------------------------
+ */
+
+void 
+XResizeWindow(
+    Display* display,		/* Display. */
+    Window window, 		/* Window. */
+    unsigned int width,
+    unsigned int height)
+{
+    MacDrawable *macWin = (MacDrawable *) window;
+    GWorldPtr destPort;
+
+    destPort = TkMacGetDrawablePort(window);
+    if (destPort == NULL) {
+	return;
+    }
+
+    display->request++;
+    SetPort((GrafPtr) destPort);
+    if (Tk_IsTopLevel(macWin->winPtr) && !Tk_IsEmbedded(macWin->winPtr)) {
+	/* 
+	 * NOTE: we are not adding the new space to the update
+	 * region.  It is currently assumed that Tk will need
+	 * to completely redraw anway.
+	 */
+	SizeWindow((WindowRef) destPort,
+		(short) width, (short) height, false);
+	TkMacInvalidateWindow(macWin, TK_WINDOW_ONLY);
+	TkMacInvalClipRgns(macWin->winPtr);
+    } else {
+	/* TODO: update all xOff & yOffs */
+	int deltaX, deltaY, parentBorderwidth;
+	MacDrawable *macParent = macWin->winPtr->parentPtr->privatePtr;
+
+        /*
+         * Find the Parent window -
+         *    For an embedded window this will be its container.
+         */
+         
+	if (Tk_IsEmbedded(macWin->winPtr)) {
+	    TkWindow *contWinPtr;
+	    
+	    contWinPtr = TkpGetOtherWindow(macWin->winPtr);
+	    if (contWinPtr == NULL) {
+	            panic("XMoveResizeWindow could not find container");
+	    }
+	    macParent = contWinPtr->privatePtr;
+	    
+	    /*
+	     * NOTE: Here we should handle out of process embedding.
+	     */
+	
+	} else {
+	    macParent = macWin->winPtr->parentPtr->privatePtr;   
+	    if (macParent == NULL) {
+	        return; /* TODO: Probably should be a panic */
+	    }
+	}
+	
+	TkMacInvalClipRgns(macParent->winPtr);
+	TkMacInvalidateWindow(macWin, TK_PARENT_WINDOW);
+
+	deltaX = - macWin->xOff;
+	deltaY = - macWin->yOff;
+
+        /*
+	 * If macWin->winPtr is an embedded window, don't offset by its
+	 *  parent's borderwidth...
+	 */
+	 
+	if (!Tk_IsEmbedded(macWin->winPtr)) {
+	    parentBorderwidth = macWin->winPtr->parentPtr->changes.border_width;
+	} else {
+	    parentBorderwidth = 0;
+	}
+	deltaX += macParent->xOff + parentBorderwidth +
+	    macWin->winPtr->changes.x;
+	deltaY += macParent->yOff + parentBorderwidth +
+	    macWin->winPtr->changes.y;
+
+	UpdateOffsets(macWin->winPtr, deltaX, deltaY);
+    }
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * XMoveResizeWindow --
+ *
+ *	Move or resize a given X window.  See X windows documentation
+ *	for further details.
+ *
+ * Results:
+ *	None.
+ *
+ * Side effects:
+ *	None.
+ *
+ *----------------------------------------------------------------------
+ */
+
+void 
+XMoveResizeWindow(
+    Display* display,		/* Display. */
+    Window window, 		/* Window. */
+    int x, int y,
+    unsigned int width,
+    unsigned int height)
+{	
+    MacDrawable *macWin = (MacDrawable *) window;
+    GWorldPtr destPort;
+
+    destPort = TkMacGetDrawablePort(window);
+    if (destPort == NULL) {
+	return;
+    }
+
+    SetPort((GrafPtr) destPort);
+    if (Tk_IsTopLevel(macWin->winPtr) && !Tk_IsEmbedded(macWin->winPtr)) {	
+	/* 
+	 * NOTE: we are not adding the new space to the update
+	 * region.  It is currently assumed that Tk will need
+	 * to completely redraw anway.
+	 */
+	
+	SizeWindow((WindowRef) destPort,
+		(short) width, (short) height, false);
+	MacMoveWindow((WindowRef) destPort, x, y);
+	
+	/* TODO: is the following right? */
+	TkMacInvalidateWindow(macWin, TK_WINDOW_ONLY);
+	TkMacInvalClipRgns(macWin->winPtr);
+    } else {
+	int deltaX, deltaY, parentBorderwidth;
+	Rect bounds;
+	MacDrawable *macParent;
+	
+        /*
+         * Find the Parent window -
+         *    For an embedded window this will be its container.
+         */
+         
+	if (Tk_IsEmbedded(macWin->winPtr)) {
+	    TkWindow *contWinPtr;
+	    
+	    contWinPtr = TkpGetOtherWindow(macWin->winPtr);
+	    if (contWinPtr == NULL) {
+	            panic("XMoveResizeWindow could not find container");
+	    }
+	    macParent = contWinPtr->privatePtr;
+	    
+	    /*
+	     * NOTE: Here we should handle out of process embedding.
+	     */
+	
+	    
+	} else {
+	    macParent = macWin->winPtr->parentPtr->privatePtr;   
+	    if (macParent == NULL) {
+	        return; /* TODO: Probably should be a panic */
+	    }
+	}
+	        
+	TkMacInvalClipRgns(macParent->winPtr);
+	TkMacInvalidateWindow(macWin, TK_PARENT_WINDOW);
+
+	deltaX = - macWin->xOff;
+	deltaY = - macWin->yOff;
+	
+        /*
+	 * If macWin->winPtr is an embedded window, don't offset by its
+	 *  parent's borderwidth...
+	 */
+	 
+	if (!Tk_IsEmbedded(macWin->winPtr)) {
+	    parentBorderwidth = macWin->winPtr->parentPtr->changes.border_width;
+	} else {
+	    parentBorderwidth = 0;
+	}
+	deltaX += macParent->xOff + parentBorderwidth +
+	    macWin->winPtr->changes.x;
+	deltaY += macParent->yOff + parentBorderwidth +
+	    macWin->winPtr->changes.y;
+		
+	UpdateOffsets(macWin->winPtr, deltaX, deltaY);
+	TkMacWinBounds(macWin->winPtr, &bounds);
+	InvalRect(&bounds);
+    }
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * XMoveWindow --
+ *
+ *	Move a given X window.  See X windows documentation for further
+ *  details.
+ *
+ * Results:
+ *	None.
+ *
+ * Side effects:
+ *	None.
+ *
+ *----------------------------------------------------------------------
+ */
+
+void 
+XMoveWindow(
+    Display* display,		/* Display. */
+    Window window,		/* Window. */
+    int x,
+    int y)
+{
+    MacDrawable *macWin = (MacDrawable *) window;
+    GWorldPtr destPort;
+
+    destPort = TkMacGetDrawablePort(window);
+    if (destPort == NULL) {
+	return;
+    }
+
+    SetPort((GrafPtr) destPort);
+    if (Tk_IsTopLevel(macWin->winPtr) && !Tk_IsEmbedded(macWin->winPtr)) {
+	/* 
+	 * NOTE: we are not adding the new space to the update
+	 * region.  It is currently assumed that Tk will need
+	 * to completely redraw anway.
+	 */
+	MacMoveWindow((WindowRef) destPort, x, y);
+
+	/* TODO: is the following right? */
+	TkMacInvalidateWindow(macWin, TK_WINDOW_ONLY);
+	TkMacInvalClipRgns(macWin->winPtr);
+    } else {
+	int deltaX, deltaY, parentBorderwidth;
+	Rect bounds;
+	MacDrawable *macParent;
+	
+        /*
+         * Find the Parent window -
+         * For an embedded window this will be its container.
+         */
+         
+	if (Tk_IsEmbedded(macWin->winPtr)) {
+	    TkWindow *contWinPtr;
+	    
+	    contWinPtr = TkpGetOtherWindow(macWin->winPtr);
+	    if (contWinPtr == NULL) {
+	            panic("XMoveWindow could not find container");
+	    }
+	    macParent = contWinPtr->privatePtr;
+	    
+	    /*
+	     * NOTE: Here we should handle out of process embedding.
+	     */
+		    
+	} else {
+	    macParent = macWin->winPtr->parentPtr->privatePtr;   
+	    if (macParent == NULL) {
+	        return; /* TODO: Probably should be a panic */
+	    }
+	}
+
+	TkMacInvalClipRgns(macParent->winPtr);
+	TkMacInvalidateWindow(macWin, TK_PARENT_WINDOW);
+
+	deltaX = - macWin->xOff;
+	deltaY = - macWin->yOff;
+	
+        /*
+	 * If macWin->winPtr is an embedded window, don't offset by its
+	 *  parent's borderwidth...
+	 */
+	 
+	if (!Tk_IsEmbedded(macWin->winPtr)) {
+	    parentBorderwidth = macWin->winPtr->parentPtr->changes.border_width;
+	} else {
+	    parentBorderwidth = 0;
+	}
+	deltaX += macParent->xOff + parentBorderwidth +
+	    macWin->winPtr->changes.x;
+	deltaY += macParent->yOff + parentBorderwidth +
+	    macWin->winPtr->changes.y;
+		
+	UpdateOffsets(macWin->winPtr, deltaX, deltaY);
+	TkMacWinBounds(macWin->winPtr, &bounds);
+	InvalRect(&bounds);
+    }
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * XRaiseWindow --
+ *
+ *	Change the stacking order of a window.
+ *
+ * Results:
+ *	None.
+ *
+ * Side effects:
+ *	Changes the stacking order of the specified window.
+ *
+ *----------------------------------------------------------------------
+ */
+
+void 
+XRaiseWindow(
+    Display* display,		/* Display. */
+    Window window)		/* Window. */
+{
+    MacDrawable *macWin = (MacDrawable *) window;
+    
+    display->request++;
+    if (Tk_IsTopLevel(macWin->winPtr) && !Tk_IsEmbedded(macWin->winPtr)) {
+	TkWmRestackToplevel(macWin->winPtr, Above, NULL);
+    } else {
+    	/* TODO: this should generate damage */
+    }
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * XConfigureWindow --
+ *
+ *	Change the size, position, stacking, or border of the specified
+ *	window.
+ *
+ * Results:
+ *	None.
+ *
+ * Side effects:
+ *	Changes the attributes of the specified window.  Note that we
+ *	ignore the passed in values and use the values stored in the
+ *	TkWindow data structure.
+ *
+ *----------------------------------------------------------------------
+ */
+
+void
+XConfigureWindow(
+    Display* display,		/* Display. */
+    Window w,			/* Window. */
+    unsigned int value_mask,
+    XWindowChanges* values)
+{
+    MacDrawable *macWin = (MacDrawable *) w;
+    TkWindow *winPtr = macWin->winPtr;
+
+    display->request++;
+
+    /*
+     * Change the shape and/or position of the window.
+     */
+
+    if (value_mask & (CWX|CWY|CWWidth|CWHeight)) {
+	XMoveResizeWindow(display, w, winPtr->changes.x, winPtr->changes.y,
+		winPtr->changes.width, winPtr->changes.height);
+    }
+
+    /*
+     * Change the stacking order of the window.  Tk actuall keeps all
+     * the information we need for stacking order.  All we need to do
+     * is make sure the clipping regions get updated and generate damage
+     * that will ensure things get drawn correctly.
+     */
+
+    if (value_mask & CWStackMode) {
+	Rect bounds;
+	GWorldPtr destPort;
+	
+	destPort = TkMacGetDrawablePort(w);
+	if (destPort != NULL) {
+	    SetPort((GrafPtr) destPort);
+	    TkMacInvalClipRgns(winPtr->parentPtr);
+	    TkMacWinBounds(winPtr, &bounds);
+	    InvalRect(&bounds);
+	}
+    } 
+
+    /* TkGenWMMoveRequestEvent(macWin->winPtr, 
+	    macWin->winPtr->changes.x, macWin->winPtr->changes.y); */
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ *  TkMacUpdateClipRgn --
+ *
+ *	This function updates the cliping regions for a given window
+ *	and all of its children.  Once updated the TK_CLIP_INVALID flag
+ *	in the subwindow data structure is unset.  The TK_CLIP_INVALID 
+ *	flag should always be unset before any drawing is attempted.
+ *
+ * Results:
+ *	None.
+ *
+ * Side effects:
+ *	The clip regions for the window and its children are updated.
+ *
+ *----------------------------------------------------------------------
+ */
+
+void
+TkMacUpdateClipRgn(
+    TkWindow *winPtr)
+{
+    RgnHandle rgn;
+    int x, y;
+    TkWindow *win2Ptr;
+
+    if (winPtr == NULL) {
+	return;
+    }
+    
+    if (winPtr->privatePtr->flags & TK_CLIP_INVALID) {
+	rgn = winPtr->privatePtr->aboveClipRgn;
+	if (tmpRgn == NULL) {
+	    tmpRgn = NewRgn();
+	}
+	
+	/* 
+	 * Start with a region defined by the window bounds.  
+	 */
+
+        x = winPtr->privatePtr->xOff;
+        y = winPtr->privatePtr->yOff;
+        SetRectRgn(rgn, (short) x, (short) y,
+	    (short) (winPtr->changes.width  + x), 
+	    (short) (winPtr->changes.height + y));
+	    
+	/* 
+	 * Clip away the area of any windows that may obscure this
+	 * window.  
+	 * For a non-toplevel window, first, clip to the parents visable
+	 * clip region.
+	 * Second, clip away any siblings that are higher in the
+	 * stacking order.
+	 * For an embedded toplevel, just clip to the container's visible
+	 * clip region.  Remember, we only allow one contained window 
+	 * in a frame, and don't support any other widgets in the frame either.
+	 * This is not currently enforced, however.
+	 */
+	
+	if (!Tk_IsTopLevel(winPtr)) { 
+	    TkMacUpdateClipRgn(winPtr->parentPtr);
+	    SectRgn(rgn, 
+		    winPtr->parentPtr->privatePtr->aboveClipRgn, rgn);
+				
+	    win2Ptr = winPtr->nextPtr;
+	    while (win2Ptr != NULL) {
+		if (Tk_IsTopLevel(win2Ptr) || !Tk_IsMapped(win2Ptr)) {
+		    win2Ptr = win2Ptr->nextPtr;
+		    continue;
+		}
+		x = win2Ptr->privatePtr->xOff;
+		y = win2Ptr->privatePtr->yOff;
+		SetRectRgn(tmpRgn, (short) x, (short) y,
+			(short) (win2Ptr->changes.width  + x), 
+			(short) (win2Ptr->changes.height + y));
+		DiffRgn(rgn, tmpRgn, rgn);
+							  
+		win2Ptr = win2Ptr->nextPtr;
+	    }
+	} else if (Tk_IsEmbedded(winPtr)) {
+            TkWindow *contWinPtr;
+        
+	    contWinPtr = TkpGetOtherWindow(winPtr);
+    	     
+    	    if (contWinPtr != NULL) {
+ 	        TkMacUpdateClipRgn(contWinPtr);
+	        SectRgn(rgn, 
+		        contWinPtr->privatePtr->aboveClipRgn, rgn);
+   	    }
+	    
+	    /*
+	     * NOTE: Here we should handle out of process embedding.
+	     */
+		    
+	}
+	
+	/* 
+	 * The final clip region is the aboveClip region (or visable
+	 * region) minus all the children of this window.
+	 * Alternatively, if the window is a container, we must also 
+	 * subtract the region of the embedded window.
+	 */
+	 
+	rgn = winPtr->privatePtr->clipRgn;
+	CopyRgn(winPtr->privatePtr->aboveClipRgn, rgn);
+		
+	win2Ptr = winPtr->childList;
+	while (win2Ptr != NULL) {
+	    if (Tk_IsTopLevel(win2Ptr) || !Tk_IsMapped(win2Ptr)) {
+		win2Ptr = win2Ptr->nextPtr;
+		continue;
+	    }
+	    x = win2Ptr->privatePtr->xOff;
+	    y = win2Ptr->privatePtr->yOff;
+	    SetRectRgn(tmpRgn, (short) x, (short) y,
+		    (short) (win2Ptr->changes.width  + x), 
+		    (short) (win2Ptr->changes.height + y));
+	    DiffRgn(rgn, tmpRgn, rgn);
+							  
+	    win2Ptr = win2Ptr->nextPtr;
+	}
+	
+	if (Tk_IsContainer(winPtr)) {
+	    win2Ptr = TkpGetOtherWindow(winPtr);
+	    if (win2Ptr != NULL) {
+		if (Tk_IsMapped(win2Ptr)) {
+		    x = win2Ptr->privatePtr->xOff;
+		    y = win2Ptr->privatePtr->yOff;
+		    SetRectRgn(tmpRgn, (short) x, (short) y,
+			    (short) (win2Ptr->changes.width  + x), 
+			    (short) (win2Ptr->changes.height + y));
+		    DiffRgn(rgn, tmpRgn, rgn);
+		}
+	    } 
+	    
+	    /*
+	     * NOTE: Here we should handle out of process embedding.
+	     */
+		    
+	}
+		
+	winPtr->privatePtr->flags &= ~TK_CLIP_INVALID;
+    }
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * TkMacVisableClipRgn --
+ *
+ *	This function returnd the Macintosh cliping region for the 
+ *	given window.  A NULL Rgn means the window is not visable.
+ *
+ * Results:
+ *	The region.
+ *
+ * Side effects:
+ *	None.
+ *
+ *----------------------------------------------------------------------
+ */
+
+RgnHandle
+TkMacVisableClipRgn(
+    TkWindow *winPtr)
+{
+    if (winPtr->privatePtr->flags & TK_CLIP_INVALID) {
+	TkMacUpdateClipRgn(winPtr);
+    }
+
+    return winPtr->privatePtr->clipRgn;
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * TkMacInvalidateWindow --
+ *
+ *	This function makes the window as invalid will generate damage
+ *	for the window.
+ *
+ * Results:
+ *	None.
+ *
+ * Side effects:
+ *	Damage is created.
+ *
+ *----------------------------------------------------------------------
+ */
+
+void
+TkMacInvalidateWindow(
+    MacDrawable *macWin,        /* Make window that's causing damage. */
+    int flag)			/* Should be TK_WINDOW_ONLY or
+				 * TK_PARENT_WINDOW */
+{
+    
+    if (flag == TK_WINDOW_ONLY) {
+	InvalRgn(macWin->clipRgn);
+    } else {
+	if (!EmptyRgn(macWin->aboveClipRgn)) {
+	    InvalRgn(macWin->aboveClipRgn);
+	}
+    }
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * TkMacGetDrawablePort --
+ *
+ *	This function returns the Graphics Port for a given X drawable.
+ *
+ * Results:
+ *	A GWorld pointer.  Either an off screen pixmap or a Window.
+ *
+ * Side effects:
+ *	None.
+ *
+ *----------------------------------------------------------------------
+ */
+
+GWorldPtr
+TkMacGetDrawablePort(
+    Drawable drawable)
+{
+    MacDrawable *macWin = (MacDrawable *) drawable;
+    
+    if (macWin == NULL) {
+        return NULL;
+    }
+    
+    /*
+     * This is NULL for off-screen pixmaps.  Then the portPtr
+     * always points to the off-screen port, and we don't
+     * have to worry about containment
+     */
+     
+    if (macWin->clipRgn == NULL) {
+	return macWin->portPtr;
+    }
+    
+    /*
+     * If the Drawable is in an embedded window, use the Port of its container.
+     *  
+     * TRICKY POINT: we can have cases when a toplevel is being destroyed
+     * where the winPtr for the toplevel has been freed, but the children 
+     * are not all the way destroyed.  The children will call this function
+     * as they are being destroyed, but Tk_IsEmbedded will return garbage.
+     * So we check the copy of the TK_EMBEDDED flag we put into the 
+     * toplevel's macWin flags.
+     */
+    
+    if (!(macWin->toplevel->flags & TK_EMBEDDED)) {
+        return macWin->toplevel->portPtr;
+    } else {
+    	TkWindow *contWinPtr;
+
+	contWinPtr = TkpGetOtherWindow(macWin->toplevel->winPtr);
+	
+    	if (contWinPtr != NULL) {
+    	    return TkMacGetDrawablePort((Drawable) contWinPtr->privatePtr);
+    	} else {
+    	    panic("TkMacGetDrawablePort couldn't find container");
+    	    return NULL;
+    	}	
+	    
+	/*
+	 * NOTE: Here we should handle out of process embedding.
+	 */
+		    
+    }
+
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * TkMacInvalClipRgns --
+ *
+ *	This function invalidates the clipping regions for a given
+ *	window and all of its children.  This function should be
+ *	called whenever changes are made to subwindows that would
+ *	effect the size or position of windows.
+ *
+ * Results:
+ *	None.
+ *
+ * Side effects:
+ *	The cliping regions for the window and its children are
+ *	mark invalid.  (Make sure they are valid before drawing.)
+ *
+ *----------------------------------------------------------------------
+ */
+
+void
+TkMacInvalClipRgns(
+    TkWindow *winPtr)
+{
+    TkWindow *childPtr;
+	
+    /* 
+     * If already marked we can stop because all 
+     * decendants will also already be marked.
+     */
+    if (winPtr->privatePtr->flags & TK_CLIP_INVALID) {
+	return;
+    }
+	
+    winPtr->privatePtr->flags |= TK_CLIP_INVALID;
+	
+    /* 
+     * Invalidate clip regions for all children & 
+     * their decendants - unless the child is a toplevel.
+     */
+    childPtr = winPtr->childList;
+    while (childPtr != NULL) {
+	if (!Tk_IsTopLevel(childPtr) && Tk_IsMapped(childPtr)) {
+	    TkMacInvalClipRgns(childPtr);
+	}
+	childPtr = childPtr->nextPtr;
+    }
+    
+    /*
+     * Also, if the window is a container, mark its embedded window
+     */
+     
+    if (Tk_IsContainer(winPtr)) {
+	childPtr = TkpGetOtherWindow(winPtr);
+
+	if (childPtr != NULL && Tk_IsMapped(childPtr)) {
+	    TkMacInvalClipRgns(childPtr);
+	}
+	
+	/*
+	 * NOTE: Here we should handle out of process embedding.
+	 */
+		    	
+    }     	    
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * TkMacWinBounds --
+ *
+ *	Given a Tk window this function determines the windows
+ *	bounds in relation to the Macintosh window's coordinate
+ *	system.  This is also the same coordinate system as the
+ *	Tk toplevel window in which this window is contained.
+ *
+ * Results:
+ *	None.
+ *
+ * Side effects:
+ *	None.
+ *
+ *----------------------------------------------------------------------
+ */
+
+void
+TkMacWinBounds(
+    TkWindow *winPtr,
+    Rect *bounds)
+{
+    bounds->left = (short) winPtr->privatePtr->xOff;
+    bounds->top = (short) winPtr->privatePtr->yOff;
+    bounds->right = (short) (winPtr->privatePtr->xOff +
+	    winPtr->changes.width);
+    bounds->bottom = (short) (winPtr->privatePtr->yOff +
+	    winPtr->changes.height);
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * MacMoveWindow --
+ *
+ *	A replacement for the Macintosh MoveWindow function.  This
+ *	function adjusts the inputs to MoveWindow to offset the root of 
+ *	the window system.  This has the effect of making the coords 
+ *	refer to the window dressing rather than the top of the content.
+ *
+ * Results:
+ *	None.
+ *
+ * Side effects:
+ *	Moves the Macintosh window.
+ *
+ *----------------------------------------------------------------------
+ */
+
+void 
+MacMoveWindow(
+    WindowRef window,
+    int x,
+    int y)
+{
+    int xOffset, yOffset;
+
+    TkMacWindowOffset(window, &xOffset, &yOffset);
+    MoveWindow((WindowRef) window, 
+	(short) (x + xOffset), (short) (y + yOffset), false);
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * UpdateOffsets --
+ *
+ *	Updates the X & Y offsets of the given TkWindow from the
+ *	TopLevel it is a decendant of.
+ *
+ * Results:
+ *	None.
+ *
+ * Side effects:
+ *	The xOff & yOff fields for the Mac window datastructure
+ *	is updated to the proper offset.
+ *
+ *----------------------------------------------------------------------
+ */
+
+static void
+UpdateOffsets(
+    TkWindow *winPtr,
+    int deltaX,
+    int deltaY)
+{
+    TkWindow *childPtr;
+
+    if (winPtr->privatePtr == NULL) {
+	/*
+	 * We havn't called Tk_MakeWindowExist for this window yet.  The
+	 * offset information will be postponed and calulated at that 
+	 * time.  (This will usually only happen when a mapped parent is
+	 * being moved but has child windows that have yet to be mapped.)
+	 */
+	return;
+    }
+    
+    winPtr->privatePtr->xOff += deltaX;
+    winPtr->privatePtr->yOff += deltaY;
+
+    childPtr = winPtr->childList;
+    while (childPtr != NULL) {
+	if (!Tk_IsTopLevel(childPtr)) {
+	    UpdateOffsets(childPtr, deltaX, deltaY);
+	}
+	childPtr = childPtr->nextPtr;
+    }
+    
+    if (Tk_IsContainer(winPtr)) {
+	childPtr = TkpGetOtherWindow(winPtr);
+	if (childPtr != NULL) {
+	    UpdateOffsets(childPtr,deltaX,deltaY);
+	}
+	    
+	/*
+	 * NOTE: Here we should handle out of process embedding.
+	 */
+		    
+    }
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * Tk_GetPixmap --
+ *
+ *	Creates an in memory drawing surface.
+ *
+ * Results:
+ *	Returns a handle to a new pixmap.
+ *
+ * Side effects:
+ *	Allocates a new Macintosh GWorld.
+ *
+ *----------------------------------------------------------------------
+ */
+
+Pixmap
+Tk_GetPixmap(
+    Display *display,	/* Display for new pixmap (can be null). */
+    Drawable d,		/* Drawable where pixmap will be used (ignored). */
+    int width,		/* Dimensions of pixmap. */
+    int height,
+    int depth)		/* Bits per pixel for pixmap. */
+{
+    QDErr err;
+    GWorldPtr gWorld;
+    Rect bounds;
+    MacDrawable *macPix;
+    PixMapHandle pixels;
+    
+    if (display != NULL) {
+	display->request++;
+    }
+    macPix = (MacDrawable *) ckalloc(sizeof(MacDrawable));
+    macPix->winPtr = NULL;
+    macPix->xOff = 0;
+    macPix->yOff = 0;
+    macPix->clipRgn = NULL;
+    macPix->aboveClipRgn = NULL;
+    macPix->referenceCount = 0;
+    macPix->toplevel = NULL;
+    macPix->flags = 0;
+
+    bounds.top = bounds.left = 0;
+    bounds.right = (short) width;
+    bounds.bottom = (short) height;
+    if (depth != 1) {
+	depth = 0;
+    }
+
+    /*
+     * Allocate memory for the off screen pixmap.  If we fail
+     * try again from system memory.  Eventually, we may have
+     * to panic.
+     */
+    err = NewGWorld(&gWorld, depth, &bounds, NULL, NULL, 0);
+    if (err != noErr) {
+	err = NewGWorld(&gWorld, depth, &bounds, NULL, NULL, useTempMem);
+    }
+    if (err != noErr) {
+        panic("Out of memory: NewGWorld failed in Tk_GetPixmap");
+    }
+
+    /*
+     * Lock down the pixels so they don't move out from under us.
+     */
+    pixels = GetGWorldPixMap(gWorld);
+    LockPixels(pixels);
+    macPix->portPtr = gWorld;
+
+    return (Pixmap) macPix;
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * Tk_FreePixmap --
+ *
+ *	Release the resources associated with a pixmap.
+ *
+ * Results:
+ *	None.
+ *
+ * Side effects:
+ *	Deletes the Macintosh GWorld created by Tk_GetPixmap.
+ *
+ *----------------------------------------------------------------------
+ */
+
+void 
+Tk_FreePixmap(
+    Display *display,		/* Display. */
+    Pixmap pixmap)     		/* Pixmap to destroy */
+{
+    MacDrawable *macPix = (MacDrawable *) pixmap;
+    PixMapHandle pixels;
+
+    display->request++;
+    pixels = GetGWorldPixMap(macPix->portPtr);
+    UnlockPixels(pixels);
+    DisposeGWorld(macPix->portPtr);
+    ckfree((char *) macPix);
+}
+