- There are two versions of Tk available on macOS: TkAqua using the native
aqua widgets and look&feel, and TkX11 using the traditional unix X11 wigets.
TkX11 requires an X11 server to be installed, such as Apple's X11 (which is
available as an optional or default install on recent macOS).
TkAqua and TkX11 can be distinguished at runtime via [tk windowingsystem].

- At a minimum, macOS 10.3 is required to run Tcl and TkX11.
TkAqua requires macOS 10.5 or later (starting with the Cocoa-based Tk 8.5.7).

- Unless weak-linking is used, Tcl/Tk built on macOS 10.x will not run on
10.y with y < x; on the other hand Tcl/Tk built on 10.y will always run on 10.x
with y <= x (but without any of the fixes and optimizations that would be
available in a binary built on 10.x).
Weak-linking is available on OS X 10.2 or later, it additionally allows Tcl/Tk
built on 10.x to run on any 10.y with x > y >= z (for a chosen z >= 2).

$pkg/Resources/Scripts/pkgIndex.tcl as well as the usual $pkg/pkgIndex.tcl.
This allows building extensions as frameworks with all script files contained in
the Resources/Scripts directory of the framework.

- [load]able binary extensions can linked as either ordinary shared libraries
(.dylib) or as MachO bundles (since 8.4.10/8.5a3); bundles have the advantage
that they are [load]ed more efficiently from a tcl VFS (no temporary copy to the
native filesystem required), and prior to macOS 10.5, only bundles can be
[unload]ed.

- The 'deploy' target of macosx/GNUmakefile installs the html manpages into the
standard documentation location in the Tcl/Tk frameworks:
	Tcl.framework/Resources/Documentation/Reference/Tcl
	Tk.framework/Resources/Documentation/Reference/Tk
No nroff manpages are installed by default by the GNUmakefile.

Window class names:
    document, modal, floating, utility, toolbar, simple, help, overlay
Window attribute names:
    standardDocument, standardFloating, resizable, fullZoom, horizontalZoom,
    verticalZoom, closeBox, collapseBox, toolbarButton, sideTitlebar,
    noTitleBar, unifiedTitleAndToolbar, metal, hud, noShadow, doesNotCycle,
    noActivates, hideOnSuspend, inWindowMenu, ignoreClicks, doesNotHide,
    canJoinAllSpaces, moveToActiveSpace, nonActivating, black, dark, light,
    gray, red, green, blue, cyan, yellow, magenta, orange, purple,
    brown, clear, opacity

Note that not all attributes are valid for all window classes.
Support for the 3 argument form was added with the Cocoa-based Tk 8.5.7, at the
same time support for some legacy Carbon-specific classes and attributes was
removed (they are still accepted by the command but no longer have any effect).

The color window attributes (black, dark, red, etc.) and the "opacity" allow  one to set the background and opacity of a textured ("metal") window. This allows a Tk window to implement a window without the dividing line between the titlebar and the rest of the window, or the "unified toolbar" effect, which is increasingly standard in Mac applications. An example:

toplevel .f
tk::unsupported::MacWindowStyle style .f document {metal light opaque closeBox collapseBox resizable standardDocument }

pack [label .f.f -bg  #ababab -text "This is a textured window\nwith opacity and a gray background\nsimilar to other Mac applications"] -fill both -expand yes

The color attributes correspond to system-defined NSColor constants (e.g., red is [NSColor redColor]. The "light" and "dark" attributes correspond to lightGrayColor and darkGrayColor, respectively (because of the way the attributes are parsed, using "lightgray" and "darkgray" would cause a conflict with the core "gray" attribute).

Below are the corresponding hex and/or Tk-defined colors that can be used from Tk widgets to match the NSColor-based attributes:

black	#000000
dark	#545454
light	#ababab
white	#ffffff
gray	#7f7f7f
red 	#ff0000
green	#00ff00
blue	#0000ff
cyan	#00ffff
yellow	#ffff00
magenta	#ff00ff
orange	#ff8000
purple 	#800080
brown	#996633
clear	systemTransparent

- The Cocoa-based TkAqua can be distinguished from the older Carbon-based
version via the [winfo server .] command, example output on macOS 10.5.7:
    Cocoa-based:	CG409.3 Apple AppKit GC 949.46 macOS 1057
    Carbon-based:	QD10R30 Apple 1057

- If you want to use Remote Debugging with Xcode, you need to set the
environment variable XCNOSTDIN to 1 in the Executable editor for Wish. That will
cause us to force closing stdin & stdout.  Otherwise, given how Xcode launches
Wish remotely, they will be left open and then Wish & gdb will fight for stdin.


3. Building Tcl/Tk on macOS
------------------------------

- At least macOS 10.3 is required to build Tcl and TkX11, and macOS 10.5
is required to build TkAqua.
Apple's Xcode Developer Tools need to be installed (only the most recent version
matching your OS release is supported), the Xcode installer is available on Mac
OS X install media or may be present in /Applications/Installers on Macs that

came with OS X preinstalled. The most recent version can always be downloaded
from the ADC website http://connect.apple.com (free ADC membership required).

- Tcl/Tk are most easily built as macOS frameworks via GNUmakefile in
tcl/macosx and tk/macosx (see below for details), but can also be built with the
standard unix configure and make buildsystem in tcl/unix resp. tk/unix as on any
other unix platform (indeed, the GNUmakefiles are just wrappers around the unix
buildsystem).
The macOS specific configure flags are --enable-aqua, --enable-framework and
--disable-corefoundation (which disables CF and notably reverts to the standard
select based notifier). Note that --enable-aqua is incompatible with
--disable-corefoundation (for both Tcl and Tk configure).

- It is also possible to build with the Xcode IDE via the projects in

tk/macosx, take care to use the project matching your DevTools and OS version:
	Tk.xcode: 		    for Xcode 3.1 on 10.5
	Tk.xcodeproj:		    for Xcode 3.2 on 10.6
These have the following targets:
	Tk:			    calls through to tk/macosx/GNUMakefile,
				    requires a corresponding build of the Tcl
				    target of tcl/macosx/Tcl.xcode.
	tktest:			    static build of TkAqua tktest for debugging.

be run on the build machine (i.e. ppc on G3/G4, ppc or ppc64 on G5, ppc or i386
on Core and ppc, i386 or x86_64 on Core2/Xeon).
Universal builds of Tcl TEA extensions are also possible with CFLAGS set as
above, they will be [load]able by universal as well as thin binaries of Tcl.

- To enable weak-linking, set the MACOSX_DEPLOYMENT_TARGET environment variable
to the minimal OS version the binaries should be able to run on, e.g:
	export MACOSX_DEPLOYMENT_TARGET=10.4
This requires at least gcc 3.1; with gcc 4 or later, set/add to CFLAGS instead:
	export CFLAGS="-mmacosx-version-min=10.4"
Support for weak-linking was added with 8.4.14/8.5a5.

Detailed Instructions for building with macosx/GNUmakefile
----------------------------------------------------------

- Unpack the Tcl and Tk source release archives and place the tcl and tk source
trees in a common parent directory.

4.2 Autorelease pools
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

In order to carry out the job of managing autorelease pools, which
would normally be handled by the [NSApp run] method, a private
NSAUtoreleasePool* property is added to the TkApplication subclass of
NSApplication. The TkpInit function calls [NSApp _setup] which
initializes this property by creating an NSAutoreleasePool. A bit
later on, TkpInit calls [NSAPP _setupEventLoop] which in turn calls
the [NSApp finishLaunching] method.


Since the CheckProc function gets called for every Tk event, it is an
appropriate place to drain the main NSAutoreleasePool and replace it
with a new pool.  This is done by calling the method [NSApp
_resetAutoreleasePool], where _resetAutoreleasePool is a method which
we define for the subclass.  Unfortunately, by itself this is not
sufficient for safe memory managememt because, as was made painfully

	<key>CFBundleShortVersionString</key>
	<string>@TK_VERSION@@TK_PATCH_LEVEL@</string>
	<key>CFBundleSignature</key>
	<string>WiSH</string>
	<key>CFBundleVersion</key>
	<string>@TK_VERSION@@TK_PATCH_LEVEL@</string>
	<key>LSMinimumSystemVersion</key>
	<string>10.5.0</string>
	<key>LSRequiresCarbon</key>
	<true/>
	<key>NSAppleScriptEnabled</key>
	<true/>
	<key>OSAScriptingDefinition</key>
	<string>Wish.sdef</string>
	<key>NSHighResolutionCapable</key>

    [TYPE_YESNOCANCEL] =	{5, 6, 4},
};

/*
 * Construct a file URL from directory and filename.  Either may
 * be nil.  If both are nil, returns nil.
 */
#if MAC_OS_X_VERSION_MIN_REQUIRED > 1050
static NSURL *getFileURL(NSString *directory, NSString *filename) {
    NSURL *url = nil;
    if (directory) {
	url = [NSURL fileURLWithPath:directory isDirectory:YES];
    }
    if (filename) {
	url = [NSURL URLWithString:filename relativeToURL:url];
    }
    return url;
}
#endif

#pragma mark TKApplication(TKDialog)

@interface NSColorPanel(TKDialog)
- (void) _setUseModalAppearance: (BOOL) flag;
@end

    }

    callbackInfo->cmdObj = cmdObj;
    callbackInfo->interp = interp;
    callbackInfo->multiple = multiple;
    parent = TkMacOSXDrawableWindow(((TkWindow *) tkwin)->window);
    if (haveParentOption && parent && ![parent attachedSheet]) {
	    parentIsKey = [parent isKeyWindow];
#if MAC_OS_X_VERSION_MIN_REQUIRED < 1060
	[openpanel beginSheetForDirectory:directory
	       file:filename
	       types:openFileTypes
	       modalForWindow:parent
	       modalDelegate:NSApp
	       didEndSelector:
		   @selector(tkFilePanelDidEnd:returnCode:contextInfo:)
	       contextInfo:callbackInfo];
#else
	if (directory || filename ) {
	    NSURL * fileURL = getFileURL(directory, filename);
	    [openpanel setDirectoryURL:fileURL];
	}

	[openpanel beginSheetModalForWindow:parent
	       completionHandler:^(NSInteger returnCode)
	       { [NSApp tkFilePanelDidEnd:openpanel
		       returnCode:returnCode
		       contextInfo:callbackInfo ]; } ];
#endif
	modalReturnCode = cmdObj ? modalOther : [NSApp runModalForWindow:openpanel];
    } else {
#if MAC_OS_X_VERSION_MIN_REQUIRED < 1060
	modalReturnCode = [openpanel runModalForDirectory:directory
				 file:filename];
#else
	if (directory || filename ) {
	    NSURL * fileURL = getFileURL(directory, filename);
	    [openpanel setDirectoryURL:fileURL];
	}

	modalReturnCode = [openpanel runModal];
#endif
	[NSApp tkFilePanelDidEnd:openpanel returnCode:modalReturnCode
		contextInfo:callbackInfo];
    }
    result = (modalReturnCode != modalError) ? TCL_OK : TCL_ERROR;
    if (parentIsKey) {
	[parent makeKeyWindow];
    }

    callbackInfo->cmdObj = cmdObj;
    callbackInfo->interp = interp;
    callbackInfo->multiple = 0;

    parent = TkMacOSXDrawableWindow(((TkWindow *) tkwin)->window);
    if (haveParentOption && parent && ![parent attachedSheet]) {
       parentIsKey = [parent isKeyWindow];
#if MAC_OS_X_VERSION_MIN_REQUIRED < 1060
	[savepanel beginSheetForDirectory:directory
	       file:filename
	       modalForWindow:parent
	       modalDelegate:NSApp
	       didEndSelector:
		   @selector(tkFilePanelDidEnd:returnCode:contextInfo:)
	       contextInfo:callbackInfo];
#else
	if (directory) {
	    [savepanel setDirectoryURL:[NSURL fileURLWithPath:directory isDirectory:YES]];
	}
	   /*check for file name, otherwise set to empty string; crashes with uncaught exception if set to nil*/
	if (filename) {
	    [savepanel setNameFieldStringValue:filename];
	} else {
	    [savepanel setNameFieldStringValue:@""];
	}
	[savepanel beginSheetModalForWindow:parent
	       completionHandler:^(NSInteger returnCode)
	       { [NSApp tkFilePanelDidEnd:savepanel
		       returnCode:returnCode
		       contextInfo:callbackInfo ]; } ];
#endif
	modalReturnCode = cmdObj ? modalOther : [NSApp runModalForWindow:savepanel];
    } else {
#if MAC_OS_X_VERSION_MIN_REQUIRED < 1060
	modalReturnCode = [savepanel runModalForDirectory:directory file:filename];
#else
	if (directory) {
	    [savepanel setDirectoryURL:[NSURL fileURLWithPath:directory isDirectory:YES]];
	}
	 /*check for file name, otherwise set to empty string; crashes with uncaught exception if set to nil*/
	if (filename) {
	    [savepanel setNameFieldStringValue:filename];
	} else {
	    [savepanel setNameFieldStringValue:@""];
	}
	modalReturnCode = [savepanel runModal];
#endif
	[NSApp tkFilePanelDidEnd:savepanel returnCode:modalReturnCode
		contextInfo:callbackInfo];
    }
    result = (modalReturnCode != modalError) ? TCL_OK : TCL_ERROR;
    if (parentIsKey) {
	[parent makeKeyWindow];
    }

    callbackInfo->multiple = 0;
    /*check for directory value, set to root if not specified; otherwise crashes with exception because of nil string parameter*/
    if (!directory) {
	directory = @"/";
    }
    parent = TkMacOSXDrawableWindow(((TkWindow *) tkwin)->window);
    if (haveParentOption && parent && ![parent attachedSheet]) {
      parentIsKey = [parent isKeyWindow];
#if MAC_OS_X_VERSION_MIN_REQUIRED < 1060
	[panel beginSheetForDirectory:directory
		file:nil
		modalForWindow:parent
		modalDelegate:NSApp
		didEndSelector: @selector(tkFilePanelDidEnd:returnCode:contextInfo:)
		contextInfo:callbackInfo];
#else
	[panel setDirectoryURL:[NSURL fileURLWithPath:directory isDirectory:YES]];
	[panel beginSheetModalForWindow:parent
	       completionHandler:^(NSInteger returnCode)
	       { [NSApp tkFilePanelDidEnd:panel
		       returnCode:returnCode
		       contextInfo:callbackInfo ]; } ];
#endif
	modalReturnCode = cmdObj ? modalOther : [NSApp runModalForWindow:panel];
    } else {
#if MAC_OS_X_VERSION_MIN_REQUIRED < 1060
	modalReturnCode = [panel runModalForDirectory:directory file:nil];
#else
	[panel setDirectoryURL:[NSURL fileURLWithPath:directory isDirectory:YES]];
	modalReturnCode = [panel runModal];
#endif
	[NSApp tkFilePanelDidEnd:panel returnCode:modalReturnCode
		contextInfo:callbackInfo];
    }
    result = (modalReturnCode != modalError) ? TCL_OK : TCL_ERROR;
    if (parentIsKey) {
	[parent makeKeyWindow];
    }

    case NSApplicationDefined: {
	id win;
	win = [theEvent window];
	break;
	}
    case NSCursorUpdate:
        break;
#if MAC_OS_X_VERSION_MAX_ALLOWED >= 1060
    case NSEventTypeGesture:
    case NSEventTypeMagnify:
    case NSEventTypeRotate:
    case NSEventTypeSwipe:
    case NSEventTypeBeginGesture:
    case NSEventTypeEndGesture:
        break;
#endif
#endif

    default:
	break; /* return theEvent */
    }
    return processedEvent;
}

static char scriptPath[PATH_MAX + 1] = "";

long tkMacOSXMacOSXVersion = 0;

#pragma mark TKApplication(TKInit)

#if MAC_OS_X_VERSION_MIN_REQUIRED < 1060
#define NSTextInputContextKeyboardSelectionDidChangeNotification @"NSTextInputContextKeyboardSelectionDidChangeNotification"
static void keyboardChanged(CFNotificationCenterRef center, void *observer, CFStringRef name, const void *object, CFDictionaryRef userInfo) {
    [[NSNotificationCenter defaultCenter] postNotificationName:NSTextInputContextKeyboardSelectionDidChangeNotification object:nil userInfo:nil];
}
#endif

@interface TKApplication(TKKeyboard)
- (void) keyboardChanged: (NSNotification *) notification;
@end

#if MAC_OS_X_VERSION_MAX_ALLOWED >= 1060
#define TKApplication_NSApplicationDelegate <NSApplicationDelegate>
#else
#define TKApplication_NSApplicationDelegate
#endif
@interface TKApplication(TKWindowEvent) TKApplication_NSApplicationDelegate
- (void) _setupWindowNotifications;
@end

@interface TKApplication(TKMenus)
- (void) _setupMenus;
@end

    observe(NSApplicationDidBecomeActiveNotification, applicationActivate:);
    observe(NSApplicationDidResignActiveNotification, applicationDeactivate:);
    observe(NSApplicationDidUnhideNotification, applicationShowHide:);
    observe(NSApplicationDidHideNotification, applicationShowHide:);
    observe(NSApplicationDidChangeScreenParametersNotification, displayChanged:);
    observe(NSTextInputContextKeyboardSelectionDidChangeNotification, keyboardChanged:);
#undef observe
#if MAC_OS_X_VERSION_MIN_REQUIRED < 1060
    CFNotificationCenterAddObserver(CFNotificationCenterGetDistributedCenter(), NULL, &keyboardChanged, kTISNotifySelectedKeyboardInputSourceChanged, NULL, CFNotificationSuspensionBehaviorCoalesce);
#endif
}

-(void)applicationWillFinishLaunching:(NSNotification *)aNotification
{

    /*
     * Initialize notifications.

	initialized = 1;

	/*
	 * Initialize/check OS version variable for runtime checks.
	 */

#if MAC_OS_X_VERSION_MIN_REQUIRED < 1050
#   error Mac OS X 10.5 required
#endif

	if (!uname(&name)) {
	    tkMacOSXMacOSXVersion = (strtod(name.release, NULL) + 96) * 10;
	}
       /*Check for new versioning scheme on Yosemite (10.10) and later.*/
	if (MAC_OS_X_VERSION_MIN_REQUIRED > 100000) {

@interface TKMenu(TKMenuPrivate)
- (id) initWithTkMenu: (TkMenu *) tkMenu;
- (TkMenu *) tkMenu;
- (int) tkIndexOfItem: (NSMenuItem *) menuItem;
- (void) insertItem: (NSMenuItem *) newItem atTkIndex: (NSInteger) index;
@end

#if MAC_OS_X_VERSION_MAX_ALLOWED >= 1060
#define TKMenu_NSMenuDelegate <NSMenuDelegate>
#else
#define TKMenu_NSMenuDelegate
#endif
@interface TKMenu(TKMenuDelegate) TKMenu_NSMenuDelegate
@end

@implementation TKMenu
- (void) setSpecial: (NSUInteger) special
{
    NSAssert(!_tkSpecial, @"Cannot change specialness of a special menu");

	do {
	    modalSession = TkMacOSXGetModalSession();
	    	    testEvent = [NSApp nextEventMatchingMask:NSAnyEventMask
					      untilDate:[NSDate distantPast]
						 inMode:GetRunLoopMode(modalSession)
						dequeue:NO];
	    /* We must not steal any events during LiveResize. */
        #if MAC_OS_X_VERSION_MAX_ALLOWED >= 1060
	    if (testEvent && [[testEvent window] inLiveResize]) {
		break;
	    }
        #else
	    if (testEvent && [[[testEvent window] contentView] inLiveResize]) {
		break;
	    }
        #endif
	    currentEvent = [NSApp nextEventMatchingMask:NSAnyEventMask
					      untilDate:[NSDate distantPast]
						 inMode:GetRunLoopMode(modalSession)
						dequeue:YES];
	    if (currentEvent) {
		/* Generate Xevents. */
		int oldServiceMode = Tcl_SetServiceMode(TCL_SERVICE_ALL);

	if ((chk) && (cond)) { __VA_ARGS__
#define tk_else_mac_os_x_chk(...) \
	} else { __VA_ARGS__
#define tk_if_mac_os_x_no(chk, cond, ...) \
	if (0) {
#define tk_else_mac_os_x_no(...) \
	} else { __VA_ARGS__
/* Private mapping macros defined according to Mac OS X version requirements */
/* 10.5 Leopard */
#if MAC_OS_X_VERSION_MIN_REQUIRED >= 1050
#define tk_if_mac_os_x_min_10_5		tk_if_mac_os_x_yes
#define tk_else_mac_os_x_min_10_5	tk_else_mac_os_x_yes
#if MAC_OS_X_VERSION_MAX_ALLOWED >= 1050
#define tk_if_mac_os_x_10_5		tk_if_mac_os_x_yes
#define tk_else_mac_os_x_10_5		tk_else_mac_os_x_yes
#endif /* MAC_OS_X_VERSION_MAX_ALLOWED */
#else /* MAC_OS_X_VERSION_MIN_REQUIRED */
#define tk_if_mac_os_x_min_10_5		tk_if_mac_os_x_chk
#define tk_else_mac_os_x_min_10_5	tk_else_mac_os_x_chk
#if MAC_OS_X_VERSION_MAX_ALLOWED >= 1050
#define tk_if_mac_os_x_10_5		tk_if_mac_os_x_chk
#define tk_else_mac_os_x_10_5		tk_else_mac_os_x_chk
#endif /* MAC_OS_X_VERSION_MAX_ALLOWED */
#endif /* MAC_OS_X_VERSION_MIN_REQUIRED */
#if MAC_OS_X_VERSION_MAX_ALLOWED < 1050
#define tk_if_mac_os_x_10_5		tk_if_mac_os_x_no
#define tk_else_mac_os_x_10_5		tk_else_mac_os_x_no
#endif /* MAC_OS_X_VERSION_MAX_ALLOWED */

/*
 * Macros for DEBUG_ASSERT_MESSAGE et al from Debugging.h.
 */

#undef kComponentSignatureString
#undef COMPONENT_SIGNATURE

#pragma mark TKApplication(TKWindowEvent)

#ifdef TK_MAC_DEBUG_NOTIFICATIONS
extern NSString *NSWindowWillOrderOnScreenNotification;
extern NSString *NSWindowDidOrderOnScreenNotification;
extern NSString *NSWindowDidOrderOffScreenNotification;

#if MAC_OS_X_VERSION_MIN_REQUIRED < 1060
#define NSWindowWillStartLiveResizeNotification @"NSWindowWillStartLiveResizeNotification"
#define NSWindowDidEndLiveResizeNotification  @"NSWindowDidEndLiveResizeNotification"
#endif
#endif

extern BOOL opaqueTag;

@implementation TKApplication(TKWindowEvent)

- (void) windowActivation: (NSNotification *) notification
{
#ifdef TK_MAC_DEBUG_NOTIFICATIONS
    TKLog(@"-[%@(%p) %s] %@", [self class], self, _cmd, notification);

 *
 *----------------------------------------------------------------------
 */

int
Tk_MacOSXIsAppInFront(void)
{
    Boolean isFrontProcess = true;
#if MAC_OS_X_VERSION_MIN_REQUIRED < 1060
    ProcessSerialNumber frontPsn, ourPsn = {0, kCurrentProcess};

    if (noErr == GetFrontProcess(&frontPsn)){
	SameProcess(&frontPsn, &ourPsn, &isFrontProcess);
    }
#else
    isFrontProcess = [NSRunningApplication currentApplication].active;
#endif
    return (isFrontProcess == true);
}

#pragma mark TKContentView

#import <ApplicationServices/ApplicationServices.h>

/*

    Tk_QueueWindowEvent((XEvent *) &event, TCL_QUEUE_TAIL);
}

- (BOOL) isOpaque
{
    NSWindow *w = [self window];

    if (opaqueTag) {
      return YES;
	} else {

     return (w && (([w styleMask] & NSTexturedBackgroundWindowMask) ||
    	    ![w isOpaque]) ? NO : YES);
    }
}

- (BOOL) wantsDefaultClipping
{
    return NO;
}

	| kWindowHideOnFullScreenAttribute  | kWindowNoConstrainAttribute \
	| kWindowNoShadowAttribute	    | kWindowLiveResizeAttribute \
	| kWindowOpaqueForEventsAttribute   | kWindowIgnoreClicksAttribute \
	| kWindowDoesNotCycleAttribute	    | tkWindowDoesNotHideAttribute \
	| tkCanJoinAllSpacesAttribute	    | tkMoveToActiveSpaceAttribute \
	| tkNonactivatingPanelAttribute	    | tkHUDWindowAttribute)

/*Objects for use in setting background color and opacity of window.*/
NSColor *colorName = NULL;
BOOL opaqueTag = FALSE;

static const struct {
    const UInt64 validAttrs, defaultAttrs, forceOnAttrs, forceOffAttrs;
    int flags; NSUInteger styleMask;
} macClassAttrs[] = {
    [kAlertWindowClass] = {
	.defaultAttrs = kWindowDoesNotCycleAttribute, },

static void		GetMinSize(TkWindow *winPtr, int *minWidthPtr,
			    int *minHeightPtr);
static void		GetMaxSize(TkWindow *winPtr, int *maxWidthPtr,
			    int *maxHeightPtr);
static void		RemapWindows(TkWindow *winPtr,
			    MacDrawable *parentWin);

#if MAC_OS_X_VERSION_MIN_REQUIRED >= 1060
#define TK_GOT_AT_LEAST_SNOW_LEOPARD 1
#endif

#pragma mark TKWindow(TKWm)

#if MAC_OS_X_VERSION_MIN_REQUIRED < 1060
@interface NSWindow(TkWm)
- (void) setCanCycle: (BOOL) canCycleFlag;
@end
#endif

@interface NSDrawerWindow : NSWindow
{
    id _i1, _i2;
}
@end

    int index, i;

    if (objc < 3) {
	Tcl_WrongNumArgs(interp, 1, objv, "option window ?arg ...?");
	return TCL_ERROR;
    }

    /*
     * Iterate through objc/objv to set correct background color and toggle
     * opacity of window.
     */

    for (i= 0; i < objc; i++) {
    	if (Tcl_StringMatch(Tcl_GetString(objv[i]), "*black*")) {
    	    colorName = [NSColor blackColor];	// use #000000 in Tk scripts to match
    	} else if (Tcl_StringMatch(Tcl_GetString(objv[i]), "*dark*")) {
    	    colorName = [NSColor darkGrayColor]; //use #545454 in Tk scripts to match
    	} else if (Tcl_StringMatch(Tcl_GetString(objv[i]), "*light*")) {
    	    colorName = [NSColor lightGrayColor]; //use #ababab in Tk scripts to match
    	} else if (Tcl_StringMatch(Tcl_GetString(objv[i]), "*white*")) {
    	    colorName = [NSColor whiteColor];	//use #ffffff in Tk scripts to match
    	} else if (Tcl_StringMatch(Tcl_GetString(objv[i]), "gray*")) {
    	    colorName = [NSColor grayColor];	//use #7f7f7f in Tk scripts to match
    	} else if (Tcl_StringMatch(Tcl_GetString(objv[i]), "*red*")) {
    	    colorName = [NSColor redColor];	//use #ff0000 in Tk scripts to match
    	} else if (Tcl_StringMatch(Tcl_GetString(objv[i]), "*green*")) {
    	    colorName = [NSColor greenColor];	//use #00ff00 in Tk scripts to match
    	} else if (Tcl_StringMatch(Tcl_GetString(objv[i]), "*blue*")) {
    	    colorName = [NSColor blueColor];	//use #0000ff in Tk scripts to match
    	} else if (Tcl_StringMatch(Tcl_GetString(objv[i]), "*cyan*")) {
    	    colorName = [NSColor cyanColor];	//use #00ffff in Tk scripts to match
    	} else if (Tcl_StringMatch(Tcl_GetString(objv[i]), "*yellow*")) {
    	    colorName = [NSColor yellowColor];	//use #ffff00 in Tk scripts to match
    	} else if (Tcl_StringMatch(Tcl_GetString(objv[i]), "*magenta*")) {
    	    colorName = [NSColor magentaColor];	//use #ff00ff in Tk scripts to match
    	} else if (Tcl_StringMatch(Tcl_GetString(objv[i]), "*orange*")) {
    	    colorName = [NSColor orangeColor];	//use #ff8000 in Tk scripts to match
    	} else if (Tcl_StringMatch(Tcl_GetString(objv[i]), "*purple*")) {
    	    colorName = [NSColor purpleColor];	//use #800080 in Tk scripts to match
    	} else if (Tcl_StringMatch(Tcl_GetString(objv[i]), "*brown*")){
    	    colorName = [NSColor brownColor];	//use #996633 in Tk scripts to match
    	} else if (Tcl_StringMatch(Tcl_GetString(objv[i]), "*clear*")) {
    	    colorName = [NSColor clearColor];	//use systemTransparent in Tk scripts to match
    	}
    	if (Tcl_StringMatch(Tcl_GetString(objv[i]), "*opacity*")) {
    	    opaqueTag = YES;
    	}
    }

    winPtr = (TkWindow *)
	    Tk_NameToWindow(interp, Tcl_GetString(objv[2]), tkwin);
    if (winPtr == NULL) {
	return TCL_ERROR;
    }
    if (!(winPtr->flags & TK_TOP_LEVEL)) {

        /*
	 * Workaround for [Bug 2824538]: Texured windows are draggable
	 *                               from opaque content.
	 */
	[window setMovableByWindowBackground:NO];
    }


    /* Set background color and opacity of window if those flags are set.  */
    if (colorName != NULL) {
    	[window setBackgroundColor: colorName];
    }

    if (opaqueTag) {
#ifdef TK_GOT_AT_LEAST_SNOW_LEOPARD
    	[window setOpaque: opaqueTag];
#else
	[window setOpaque: YES];
#endif
    }

    [window setDocumentEdited:NO];
    wmPtr->window = window;
    macWin->view = window.contentView;
    TkMacOSXApplyWindowAttributes(winPtr, window);

    NSRect geometry = InitialWindowBounds(winPtr, window);
    geometry.size.width +=  structureRect.size.width;

		initial) {
	    NSWindowCollectionBehavior b = NSWindowCollectionBehaviorDefault;
	    if (newAttributes & tkCanJoinAllSpacesAttribute) {
		b |= NSWindowCollectionBehaviorCanJoinAllSpaces;
	    } else if (newAttributes & tkMoveToActiveSpaceAttribute) {
		b |= NSWindowCollectionBehaviorMoveToActiveSpace;
	    }
#if MAC_OS_X_VERSION_MAX_ALLOWED >= 1060
	    if (newAttributes & kWindowDoesNotCycleAttribute) {
		b |= NSWindowCollectionBehaviorIgnoresCycle;
	    } else {
		b |= NSWindowCollectionBehaviorParticipatesInCycle;
	    }
#endif
	    [macWindow setCollectionBehavior:b];
#if MAC_OS_X_VERSION_MIN_REQUIRED < 1060
	    if (((changedAttributes & kWindowDoesNotCycleAttribute) || initial)
#if MAC_OS_X_VERSION_MAX_ALLOWED >= 1060
		    && tkMacOSXMacOSXVersion < 1060
#endif
	    ) {
		[macWindow setCanCycle:
			!(newAttributes & kWindowDoesNotCycleAttribute)];
	    }
#endif
	}
	if ((wmPtr->flags & WM_TOPMOST) != (oldFlags & WM_TOPMOST)) {
	    [macWindow setLevel:(wmPtr->flags & WM_TOPMOST) ?
		    kCGUtilityWindowLevel : ([macWindow isKindOfClass:
		    [NSPanel class]] && [macWindow isFloatingPanel] ?
		    kCGFloatingWindowLevel : kCGNormalWindowLevel)];
	}

    TkWindow *winPtr,
    NSWindow *window,
    int fullscreen,
    Tcl_Interp *interp)
{
    WmInfo *wmPtr = winPtr->wmInfoPtr;
    int result = TCL_OK, wasFullscreen = (wmPtr->flags & WM_FULLSCREEN);
#ifdef TK_GOT_AT_LEAST_SNOW_LEOPARD
    static unsigned long prevMask = 0, prevPres = 0;
#endif /*TK_GOT_AT_LEAST_SNOW_LEOPARD*/

    if (fullscreen) {
	int screenWidth =  WidthOfScreen(Tk_Screen(winPtr));
	int screenHeight = HeightOfScreen(Tk_Screen(winPtr));

	/*
	 * Check max width and height if set by the user.

		[window setFrame:[window frameRectForContentRect:
			screenBounds] display:YES];
		wmPtr->flags &= ~WM_SYNC_PENDING;
	    }
	    wmPtr->flags |= WM_FULLSCREEN;
	}

#ifdef TK_GOT_AT_LEAST_SNOW_LEOPARD
	/*
	 * We can't set these features on Leopard or earlier, as they don't
	 * exist (neither options nor API that uses them). This formally means
	 * that there's a bug with full-screen windows with Tk on old OSX, but
	 * it isn't worth blocking a build just for this.
	 */

	prevMask = [window styleMask];
	prevPres = [NSApp presentationOptions];
	[window setStyleMask: NSBorderlessWindowMask];
	[NSApp setPresentationOptions: NSApplicationPresentationAutoHideDock
	                          | NSApplicationPresentationAutoHideMenuBar];
	Tk_MapWindow((Tk_Window) winPtr);
#endif /*TK_GOT_AT_LEAST_SNOW_LEOPARD*/
    } else {
	wmPtr->flags &= ~WM_FULLSCREEN;

#ifdef TK_GOT_AT_LEAST_SNOW_LEOPARD
	[NSApp setPresentationOptions: prevPres];
	[window setStyleMask: prevMask];
#endif /*TK_GOT_AT_LEAST_SNOW_LEOPARD*/
    }

    if (wasFullscreen && !(wmPtr->flags & WM_FULLSCREEN)) {
	Tk_UnmapWindow((Tk_Window) winPtr);
	UInt64 oldAttributes = wmPtr->attributes;
	NSRect bounds = NSMakeRect(wmPtr->configX, tkMacOSXZeroScreenHeight -
		(wmPtr->configY + wmPtr->yInParent + wmPtr->configHeight),