/*
   The window class

   Copyright (C) 1996 Free Software Foundation, Inc.

   Author:  Scott Christley <scottc@net-community.com>
	    Venkat Ajjanagadde <venkat@ocbi.com>
   Date: 1996
   Author:  Felipe A. Rodriguez <far@ix.netcom.com>
   Date: June 1998
   Author:  Richard Frith-Macdonald <richard@brainstorm.co.uk>
   Date: December 1998

   This file is part of the GNUstep GUI Library.

   This library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Library General Public
   License as published by the Free Software Foundation; either
   version 2 of the License, or (at your option) any later version.

   This library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.	 See the GNU
   Library General Public License for more details.

   You should have received a copy of the GNU Library General Public
   License along with this library; see the file COPYING.LIB.
   If not, write to the Free Software Foundation,
   59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/

#include <gnustep/gui/config.h>

#include <Foundation/NSString.h>
#include <Foundation/NSCoder.h>
#include <Foundation/NSArray.h>
#include <Foundation/NSGeometry.h>
#include <Foundation/NSNotification.h>
#include <Foundation/NSValue.h>
#include <Foundation/NSException.h>
#include <Foundation/NSSet.h>
#include <Foundation/NSLock.h>
#include <Foundation/NSUserDefaults.h>

#include <AppKit/NSDocument.h>
#include <AppKit/NSWindow.h>
#include <AppKit/NSWindowController.h>
#include <AppKit/NSApplication.h>
#include <AppKit/NSMenu.h>
#include <AppKit/NSImage.h>
#include <AppKit/NSTextFieldCell.h>
#include <AppKit/NSTextField.h>
#include <AppKit/NSColor.h>
#include <AppKit/GSTrackingRect.h>
#include <AppKit/NSSliderCell.h>
#include <AppKit/NSScreen.h>
#include <AppKit/NSView.h>
#include <AppKit/NSCursor.h>
#include <AppKit/PSOperators.h>
#include <AppKit/NSDragging.h>
#include <AppKit/NSPasteboard.h>
#include <AppKit/NSHelpManager.h>
#include <AppKit/NSGraphicsContext.h>
#include <AppKit/NSGraphics.h>
#include <AppKit/GSWraps.h>

BOOL GSViewAcceptsDrag(NSView *v, id<NSDraggingInfo> dragInfo);

/*
 * Catagory for internal methods (for use only within the
 * NSWindow class itsself)
 */
@interface	NSWindow (GNUstepPrivate)
- (void) _handleWindowNeedsDisplay: (id)bogus;
- (void) _lossOfKeyOrMainWindow;
@end

@implementation	NSWindow (GNUstepPrivate)
- (void) _handleWindowNeedsDisplay: (id)bogus
{
  [self displayIfNeeded];
}
- (void) _lossOfKeyOrMainWindow
{
  NSArray	*windowList = GSAllWindows();
  unsigned	pos = [windowList indexOfObjectIdenticalTo: self];
  unsigned	c = [windowList count];
  unsigned	i;
  NSWindow	*w;

  if ([self isKeyWindow])
    {
      [self resignKeyWindow];
      i = pos + 1;
      if (i == c)
	{
	  i = 0;
	}
      while (i != pos)
	{
	  w = [windowList objectAtIndex: i];
	  if ([w isVisible] && [w canBecomeKeyWindow])
	    {
	      [w makeKeyWindow];
	      break;
	    }

	  i++;
	  if (i == c)
	    {
	      i = 0;
	    }
	}
      /*
       * if we didn't find a possible key window - use the app icon or,
       * failing that, use the menu window.
       */
      if (i == pos)
	{
	  w = [NSApp iconWindow];
	  if (w == nil || [w isVisible] == NO)
	    {
	      w = [[NSApp mainMenu] window];
	    }
	  if (w != nil && [w isVisible] == YES)
	    {
	      [GSCurrentContext() DPSsetinputfocus: [w windowNumber]];
	    }
	}
    }
  if ([self isMainWindow])
    {
      NSWindow	*w = [NSApp keyWindow];

      [self resignMainWindow];
      if (w != nil && [w canBecomeMainWindow])
	{
	  [w makeMainWindow];
	}
      else
	{
	  i = pos + 1;
	  if (i == c)
	    {
	      i = 0;
	    }
	  while (i != pos)
	    {
	      w = [windowList objectAtIndex: i];
	      if ([w isVisible] && [w canBecomeMainWindow])
		{
		  [w makeMainWindow];
		  break;
		}
	    
	      i++;
	      if (i == c)
		{
		  i = 0;
		}		  
	    }
	}
    }
}
@end




@interface	NSMiniWindow : NSWindow
@end

@implementation	NSMiniWindow

- (BOOL) canBecomeMainWindow
{
  return NO;
}

- (BOOL) canBecomeKeyWindow
{
  return NO;
}

- (void) _initDefaults
{
  [super _initDefaults];
  [self setExcludedFromWindowsMenu: YES];
  [self setReleasedWhenClosed: NO];
  _windowLevel = NSDockWindowLevel;
}

@end

@interface NSMiniWindowView : NSView
{
  NSCell	*imageCell;
  NSCell	*titleCell;
}
- (void) setImage: (NSImage*)anImage;
- (void) setTitle: (NSString*)aString;
@end

static NSCell* tileCell = nil;

@implementation NSMiniWindowView

+ (void) initialize
{
  NSImage	*tileImage = [NSImage imageNamed: @"common_Tile"];

  tileCell = [[NSCell alloc] initImageCell: tileImage];
  [tileCell setBordered: NO];
}

- (BOOL) acceptsFirstMouse: (NSEvent*)theEvent
{
  return YES;
}

- (void) dealloc
{
  TEST_RELEASE(imageCell);
  TEST_RELEASE(titleCell);
  [super dealloc];
}

- (void) drawRect: (NSRect)rect
{                                                
  [tileCell drawWithFrame: NSMakeRect(0,0,64,64) inView: self];
  [imageCell drawWithFrame: NSMakeRect(8,8,48,48) inView: self];
  [titleCell drawWithFrame: NSMakeRect(0,56,64,8) inView: self];
}

- (void) mouseDown: (NSEvent*)theEvent
{
  if ([theEvent clickCount] >= 2)
    {
      NSWindow	*w = [_window counterpart];
      [w deminiaturize: self];
    }
  else
    {
      NSPoint	lastLocation;
      NSPoint	location;
      unsigned	eventMask = NSLeftMouseDownMask | NSLeftMouseUpMask
	| NSPeriodicMask | NSMiddleMouseUpMask | NSRightMouseUpMask;
      NSDate	*theDistantFuture = [NSDate distantFuture];
      BOOL	done = NO;

      lastLocation = [theEvent locationInWindow];
      [NSEvent startPeriodicEventsAfterDelay: 0.02 withPeriod: 0.02];

      while (!done)
	{
	  theEvent = [NSApp nextEventMatchingMask: eventMask
					untilDate: theDistantFuture
					   inMode: NSEventTrackingRunLoopMode
					  dequeue: YES];
	
	  switch ([theEvent type])
	    {
	      case NSRightMouseUp:
	      case NSMiddleMouseUp:
	      case NSLeftMouseUp:
	      /* right mouse up or left mouse up means we're done */
		done = YES;
		break;
	      case NSPeriodic:
		location = [_window mouseLocationOutsideOfEventStream];
		if (NSEqualPoints(location, lastLocation) == NO)
		  {
		    NSPoint	origin = [_window frame].origin;

		    origin.x += (location.x - lastLocation.x);
		    origin.y += (location.y - lastLocation.y);
		    [_window setFrameOrigin: origin];
		  }
		break;

	      default:
		break;
	    }
	}
      [NSEvent stopPeriodicEvents];
    }
}                                                        

- (void) setImage: (NSImage*)anImage
{
  if (imageCell == nil)
    {
      imageCell = [[NSCell alloc] initImageCell: anImage];
      [imageCell setBordered: NO];
    }
  else
    {
      [imageCell setImage: anImage];
    }
  if (_window != nil)
    {
      [self lockFocus];
      [self drawRect: [self bounds]];
      [self unlockFocus];
      [_window flushWindow];
    }
}

- (void) setTitle: (NSString*)aString
{
  if (titleCell == nil)
    {
      titleCell = [[NSCell alloc] initTextCell: aString];
      [titleCell setBordered: NO];
    }
  else
    {
      [titleCell setStringValue: aString];
    }
  if (_window != nil)
    {
      [self lockFocus];
      [self drawRect: [self bounds]];
      [self unlockFocus];
      [_window flushWindow];
    }
}

@end



@interface GSWindowView : NSView
{
}
@end

@implementation GSWindowView

- (BOOL) isOpaque
{
  return YES;
}

- (void) drawRect: (NSRect)rect
{
  NSColor *c = [[self window] backgroundColor];

  [c set];
  NSRectFill(rect);
}

/*
 * Special setFrame: implementation - a minimal autoresize mechanism
 */
- (void) setFrame: (NSRect)frameRect
{
  NSSize oldSize = _frame.size;
  NSView *cv = [_window contentView];

  _autoresizes_subviews = NO;
  [super setFrame: frameRect];
  // Safety Check.
  [cv setAutoresizingMask: (NSViewWidthSizable | NSViewHeightSizable)];
  [cv resizeWithOldSuperviewSize: oldSize];
}

- (Class) classForCoder: (NSCoder*)aCoder
{
  if ([self class] == [GSWindowView class])
    return [super class];
  return [self class];
}

@end

/*****************************************************************************
 *
 *	NSWindow
 *
 *****************************************************************************/

@implementation NSWindow

typedef struct NSView_struct
{
  @defs(NSView)
} *NSViewPtr;


/*
 * Class variables
 */
static SEL	ccSel;
static SEL	ctSel;
static IMP	ccImp;
static IMP	ctImp;
static Class	responderClass;
static Class	viewClass;
static NSMutableSet	*autosaveNames;
static NSRecursiveLock	*windowsLock;
static NSMapTable* windowmaps = NULL;

/*
 * Class methods
 */
+ (void) initialize
{
  if (self == [NSWindow class])
    {
      NSDebugLog(@"Initialize NSWindow class\n");
      [self setVersion: 2];
      ccSel = @selector(_checkCursorRectangles:forEvent:);
      ctSel = @selector(_checkTrackingRectangles:forEvent:);
      ccImp = [self instanceMethodForSelector: ccSel];
      ctImp = [self instanceMethodForSelector: ctSel];
      responderClass = [NSResponder class];
      viewClass = [NSView class];
      autosaveNames = [NSMutableSet new];
      windowsLock = [NSRecursiveLock new];
    }
}

+ (void) removeFrameUsingName: (NSString*)name
{
  if (name != nil)
    {
      NSString	*key;

      key = [NSString stringWithFormat: @"NSWindow Frame %@", name];
      [windowsLock lock];
      [[NSUserDefaults standardUserDefaults] removeObjectForKey: key];
      [windowsLock unlock];
    }
}

+ (NSRect) contentRectForFrameRect: (NSRect)aRect
			 styleMask: (unsigned int)aStyle
{
  NSGraphicsContext	*context = GSCurrentContext();
  float	t, b, l, r;

  DPSstyleoffsets(context, &l, &r, &t, &b, aStyle);
  aRect.size.width -= (l + r);
  aRect.size.height -= (t + b);
  aRect.origin.x += l;
  aRect.origin.y += b;
  return aRect;
}

+ (NSRect) frameRectForContentRect: (NSRect)aRect
			 styleMask: (unsigned int)aStyle
{
  NSGraphicsContext	*context = GSCurrentContext();
  float	t, b, l, r;

  DPSstyleoffsets(context, &l, &r, &t, &b, aStyle);
  aRect.size.width += (l + r);
  aRect.size.height += (t + b);
  aRect.origin.x -= l;
  aRect.origin.y -= b;
  return aRect;
}

+ (NSRect) minFrameWidthWithTitle: (NSString*)aTitle
			styleMask: (unsigned int)aStyle
{
  NSGraphicsContext	*context = GSCurrentContext();
  float	t, b, l, r;
  NSRect	f = NSZeroRect;

  DPSstyleoffsets(context, &l, &r, &t, &b, aStyle);
  f.size.width = l + r;
  f.size.height = t + b;
  /*
   * Assume that the width of the area needed for a button is equal to
   * the height of the title bar.
   */
  if (aStyle & NSClosableWindowMask)
    f.size.width += t;
  if (aStyle & NSMiniaturizableWindowMask)
    f.size.width += t;
  /*
   * FIXME - title width has to be better determined than this.
   * need to get correct values from font.
   */
  f.size.width += [aTitle length] * 10;
  return f;
}

/* default Screen and window depth */
+ (NSWindowDepth) defaultDepthLimit
{
  // FIXME: This should come from the server
  return 8;
}

+ (void)menuChanged: (NSMenu*)aMenu
{
  // FIXME: This method is for MS Windows only, does nothing 
  // on other window systems 
}

/*
 * Instance methods
 */
- (id) init
{
  int style;

  NSDebugLog(@"NSWindow -init\n");

  style = NSTitledWindowMask | NSClosableWindowMask
	  | NSMiniaturizableWindowMask | NSResizableWindowMask;

  return [self initWithContentRect: NSZeroRect
			 styleMask: style
			   backing: NSBackingStoreBuffered
			     defer: NO];
}

- (void) dealloc
{
  NSGraphicsContext	*context = GSCurrentContext();

  [[NSNotificationCenter defaultCenter] removeObserver: self];
  [[NSRunLoop currentRunLoop]
	 cancelPerformSelector: @selector(_handleWindowNeedsDisplay:)
			target: self
		      argument: nil];
  [NSApp removeWindowsItem: self];

  [self setFrameAutosaveName: nil];
  if (_counterpart != 0 && (_styleMask & NSMiniWindowMask) == 0)
    {
      NSWindow	*mini = [NSApp windowWithWindowNumber: _counterpart];

      _counterpart = 0;
      RELEASE(mini);
    }
  TEST_RELEASE(_wv);
  TEST_RELEASE(_fieldEditor);
  TEST_RELEASE(_backgroundColor);
  TEST_RELEASE(_representedFilename);
  TEST_RELEASE(_miniaturizedTitle);
  TEST_RELEASE(_miniaturizedImage);
  TEST_RELEASE(_windowTitle);
  TEST_RELEASE(_rectsBeingDrawn);
  TEST_RELEASE(_initialFirstResponder);
  TEST_RELEASE(_defaultButtonCell);

  /*
   * FIXME This should not be necessary - the views should have removed
   * their drag types, so we should already have been removed.
   */
  [context _removeDragTypes: nil fromWindow: self];

  if (_gstate)
    DPSundefineuserobject(context, _gstate);
  DPStermwindow(context, _windowNum);
  NSMapRemove(windowmaps, (void*)_windowNum);
  [super dealloc];
}

- (void) _initBackendWindow: (NSRect)frame
{
  id dragTypes;
  NSGraphicsContext	*context = GSCurrentContext();

  /* If we were deferred or one shot, out drag types may not have
     been registered properly in the backend. Remove them then re-add
     them when we create the window */
  dragTypes = [context _dragTypesForWindow: self];
  if (dragTypes)
    {
      [context _removeDragTypes: dragTypes fromWindow: self];
    }

  frame = [NSWindow contentRectForFrameRect: frame styleMask: _styleMask];
  DPSwindow(context, NSMinX(frame), NSMinY(frame),
	    NSWidth(frame), NSHeight(frame),
	    _backingType, &_windowNum);
  DPSstylewindow(context, _styleMask, _windowNum);
  DPSsetwindowlevel(context, [self level], _windowNum);

  // Set window in new _gstate
  DPSgsave(context);
  DPSwindowdevice(context, _windowNum);
  DPSgstate(context);
  _gstate = GSWDefineAsUserObj(context);
  DPSgrestore(context);
  NSMapInsert (windowmaps, (void*)_windowNum, self);

  if (NSIsEmptyRect([_wv frame]))
    {
      frame.origin = NSZeroPoint;
      [_wv setFrame: frame];
    }
  [_wv setNeedsDisplay: YES];

  /* Ok, now add the drag types back */
  if (dragTypes)
    {
      NSDebugLLog(@"NSWindow", @"Resetting drag types for window");
      [context _addDragTypes: dragTypes toWindow: self];
    }

  /* Other stuff we need to do for deferred windows */
  if (_windowTitle != nil)
    DPStitlewindow(GSCurrentContext(), [_windowTitle cString], _windowNum);
  if (!NSEqualSizes(_minimumSize, NSZeroSize))
    [self setMinSize: _minimumSize];
  if (!NSEqualSizes(_maximumSize, NSZeroSize))
    [self setMaxSize: _maximumSize];
  if (!NSEqualSizes(_increments, NSZeroSize))
    [self setResizeIncrements: _increments];

  NSDebugLLog(@"NSWindow", @"Created NSWindow frame %@",
	      NSStringFromRect(_frame));
}

/*
 * Initializing and getting a new NSWindow object
 */
- (id) initWithContentRect: (NSRect)contentRect
		 styleMask: (unsigned int)aStyle
		   backing: (NSBackingStoreType)bufferingType
		     defer: (BOOL)flag
{
  NSDebugLog(@"NSWindow -initWithContentRect: \n");

  return [self initWithContentRect: contentRect
			 styleMask: aStyle
			   backing: bufferingType
			     defer: flag
			    screen: nil];
}

- (id) initWithContentRect: (NSRect)contentRect
		 styleMask: (unsigned int)aStyle
		   backing: (NSBackingStoreType)bufferingType
		     defer: (BOOL)flag
		    screen: (NSScreen*)aScreen
{
  NSRect		cframe;

  NSDebugLog(@"NSWindow default initializer\n");
  if (!NSApp)
    NSLog(@"No application!\n");

  NSDebugLog(@"NSWindow start of init\n");
  if (!windowmaps)
    windowmaps = NSCreateMapTable(NSIntMapKeyCallBacks,
				 NSNonRetainedObjectMapValueCallBacks, 20);

  /* Initialize attributes and flags */
  [super init];
  [self _initDefaults];

  _backingType = bufferingType;
  _styleMask = aStyle;
  
  _frame = [NSWindow frameRectForContentRect: contentRect styleMask: aStyle];
  _minimumSize = NSMakeSize(_frame.size.width - contentRect.size.width + 1,
    _frame.size.height - contentRect.size.height + 1);
  _maximumSize = NSMakeSize (10e4, 10e4);

  [self setNextResponder: NSApp];

  _f.cursor_rects_enabled = YES;
  _f.cursor_rects_valid = NO;

  /* Create the window view */
  cframe.origin = NSZeroPoint;
  cframe.size = contentRect.size;
  _wv = [[GSWindowView allocWithZone: [self zone]] initWithFrame: cframe];
  [_wv viewWillMoveToWindow: self];

  /* Create the content view */
  cframe.origin = NSZeroPoint;
  cframe.size = contentRect.size;
  [self setContentView: AUTORELEASE([[NSView alloc] initWithFrame: cframe])];

  /* rectBeingDrawn is variable used to optimize flushing the backing store.
     It is set by NSGraphicsContext during a lockFocus to tell NSWindow what
     part a view is drawing in, so NSWindow only has to flush that portion */
  _rectsBeingDrawn = RETAIN([NSMutableArray arrayWithCapacity: 10]);

  /* Create window (if not deferred) */
  _windowNum = 0;
  _gstate = 0;
  if (flag == NO)
    {
      NSDebugLLog(@"NSWindow", @"Creating NSWindow\n");
      [self _initBackendWindow: _frame];
    }
  else
    NSDebugLLog(@"NSWindow", @"Defering NSWindow creation\n");

  NSDebugLog(@"NSWindow end of init\n");
  return self;
}

/*
 * Accessing the content view
 */
- (id) contentView
{
  return _contentView;
}

- (void) setContentView: (NSView*)aView
{
  if (aView == nil)
    {
      aView = AUTORELEASE([[NSView alloc] initWithFrame: _frame]);
    }
  if (_contentView != nil)
    {
      [_contentView removeFromSuperview];
    }
  _contentView = aView;
  [_contentView setAutoresizingMask: (NSViewWidthSizable 
				      | NSViewHeightSizable)];
  [_wv addSubview: _contentView];
  [_contentView resizeWithOldSuperviewSize: [_contentView frame].size]; 
  [_contentView setFrameOrigin: [_wv bounds].origin];

  NSAssert1 ([[_wv subviews] count] == 1,
    @"window's view has %d	 subviews!", [[_wv subviews] count]);

  [_contentView setNextResponder: self];
}

/*
 * Window graphics
 */
- (NSColor*) backgroundColor
{
  return _backgroundColor;
}

- (NSString*) representedFilename
{
  return _representedFilename;
}

- (void) setBackgroundColor: (NSColor*)color
{
  ASSIGN(_backgroundColor, color);
}

- (void) setRepresentedFilename: (NSString*)aString
{
  ASSIGN(_representedFilename, aString);
}

- (void) setTitle: (NSString*)aString
{
  if ([_windowTitle isEqual: aString] == NO)
    {
      ASSIGN(_windowTitle, aString);
      [self setMiniwindowTitle: aString];
      if (_windowNum > 0)
	DPStitlewindow(GSCurrentContext(), [aString cString], _windowNum);
      if (_f.menu_exclude == NO && _f.has_opened == YES)
	{
	  [NSApp changeWindowsItem: self
			     title: aString
			  filename: NO];
	}
    }
}

- (void) setTitleWithRepresentedFilename: (NSString*)aString
{
  [self setRepresentedFilename: aString];
  aString = [NSString stringWithFormat:
    @"%@  --  %@", [aString lastPathComponent],
    [aString stringByDeletingLastPathComponent]];
  if ([_windowTitle isEqual: aString] == NO)
    {
      ASSIGN(_windowTitle, aString);
      [self setMiniwindowTitle: aString];
      if (_windowNum > 0)
	DPStitlewindow(GSCurrentContext(), [aString cString], _windowNum);
      if (_f.menu_exclude == NO && _f.has_opened == YES)
	{
	  [NSApp changeWindowsItem: self
			     title: aString
			  filename: YES];
	}
    }
}

- (unsigned int) styleMask
{
  return _styleMask;
}

- (NSString*) title
{
  return _windowTitle;
}

/*
 * Window device attributes
 */
- (NSBackingStoreType) backingType
{
  return _backingType;
}

- (NSDictionary*) deviceDescription
{
  return [[self screen] deviceDescription];
}

- (int) gState
{
  if (_gstate <= 0)
    NSDebugLLog(@"NSWindow", @"gState called on deferred window");
  return _gstate;
}

- (BOOL) isOneShot
{
  return _f.is_one_shot;
}

- (void) setBackingType: (NSBackingStoreType)type
{
  _backingType = type;
}

- (void) setOneShot: (BOOL)flag
{
  _f.is_one_shot = flag;
}

- (int) windowNumber
{
  if (_windowNum <= 0)
    NSDebugLLog(@"NSWindow", @"windowNumber called on deferred window");
  return _windowNum;
}

/*
 * The miniwindow
 */
- (NSImage*) miniwindowImage
{
  return _miniaturizedImage;
}

- (NSString*) miniwindowTitle
{
  return _miniaturizedTitle;
}

- (void) setMiniwindowImage: (NSImage*)image
{
  ASSIGN(_miniaturizedImage, image);
  if (_counterpart != 0 && (_styleMask & NSMiniWindowMask) == 0)
    {
      NSMiniWindow	*mini = [NSApp windowWithWindowNumber: _counterpart];
      id		v = [mini contentView];

      if ([v respondsToSelector: @selector(setImage:)])
	{
	  [v setImage: [self miniwindowImage]];
	}
    }
}

- (void) setMiniwindowTitle: (NSString*)title
{
  ASSIGN(_miniaturizedTitle, title);
  if (_counterpart != 0 && (_styleMask & NSMiniWindowMask) == 0)
    {
      NSMiniWindow	*mini = [NSApp windowWithWindowNumber: _counterpart];
      id		v = [mini contentView];

      if ([v respondsToSelector: @selector(setTitle:)])
	{
	  [v setTitle: [self miniwindowTitle]];
	}
    }
}

- (NSWindow*) counterpart
{
  if (_counterpart == 0)
    return nil;
  return [NSApp windowWithWindowNumber: _counterpart];
}

/*
 * The field editor
 */
- (void) endEditingFor: (id)anObject
{
  NSText *t = [self fieldEditor: NO
		    forObject: anObject];

  if (t && (_firstResponder == t))
    {
      [[NSNotificationCenter defaultCenter]
	postNotificationName: NSTextDidEndEditingNotification
	object: t];
      [t setText: @""];
      [t setDelegate: nil];
      [t removeFromSuperview];
      _firstResponder = self;
      [_firstResponder becomeFirstResponder];
    }
}

- (NSText*) fieldEditor: (BOOL)createFlag forObject: (id)anObject
{
  /* ask delegate if it can provide a field editor */
  if ((_delegate != anObject) 
      && [_delegate respondsToSelector:
		      @selector(windowWillReturnFieldEditor:toObject:)]) 
    {
      NSText *editor;
      
      editor = [_delegate windowWillReturnFieldEditor: self   
			  toObject: anObject];
      
      if (editor != nil)
	{
	  return editor;
	}
    }
  /*
   * Each window has a global text field editor, if it doesn't exist create it
   * if create flag is set
   */
  if (!_fieldEditor && createFlag)
    {
      _fieldEditor = [NSText new];
      [_fieldEditor setFieldEditor: YES];
    }

  return _fieldEditor;
}

/*
 * Window controller
 */
- (void) setWindowController: (NSWindowController*)windowController
{
  ASSIGN(_windowController, windowController);
}

- (id) windowController
{
  return _windowController;
}

/*
 * Window status and ordering
 */
- (void) becomeKeyWindow
{
  if (_f.is_key == NO)
    {
      NSNotificationCenter *nc = [NSNotificationCenter defaultCenter];

      [_firstResponder becomeFirstResponder];
      if ((_firstResponder != self)
	&& [_firstResponder respondsToSelector: @selector(becomeKeyWindow)])
	[_firstResponder becomeKeyWindow];

      _f.is_key = YES;
      DPSsetinputstate(GSCurrentContext(), _windowNum, GSTitleBarKey);
      DPSsetinputfocus(GSCurrentContext(), _windowNum);
      [self resetCursorRects];
      [nc postNotificationName: NSWindowDidBecomeKeyNotification object: self];
    }
}

- (void) becomeMainWindow
{
  if (_f.is_main == NO)
    {
      NSNotificationCenter *nc = [NSNotificationCenter defaultCenter];

      _f.is_main = YES;
      if (_f.is_key == NO)
	{
	  DPSsetinputstate(GSCurrentContext(), _windowNum, GSTitleBarMain);
	}
      [nc postNotificationName: NSWindowDidBecomeMainNotification object: self];
    }
}

- (BOOL) canBecomeKeyWindow
{
  if (!_f.visible)
    return NO;
  if (_f.is_miniaturized)
    return NO;
  if ((NSResizableWindowMask | NSTitledWindowMask) & _styleMask)
    return YES;
  else
    return NO;
}

- (BOOL) canBecomeMainWindow
{
  if (!_f.visible)
    return NO;
  if (_f.is_miniaturized)
    return NO;
  if ((NSResizableWindowMask | NSTitledWindowMask) & _styleMask)
    return YES;
  else
    return NO;
}

- (BOOL) hidesOnDeactivate
{
  return _f.hides_on_deactivate;
}

- (BOOL) isKeyWindow
{
  return _f.is_key;
}

- (BOOL) isMainWindow
{
  return _f.is_main;
}

- (BOOL) isMiniaturized
{
  return _f.is_miniaturized;
}

- (BOOL) isVisible
{
  return _f.visible;
}

- (int) level
{
  return _windowLevel;
}

- (void) makeKeyAndOrderFront: (id)sender
{
  [self orderFront: sender];
  [self makeKeyWindow];
  /*
   * OPENSTEP makes a window the main window when it makes it the key window.
   * So we do the same (though the documentation doesn't mention it).
   */
  [self makeMainWindow];
}

- (void) makeKeyWindow
{
  if (![self canBecomeKeyWindow])
    return;
  [[NSApp keyWindow] resignKeyWindow];

  [self becomeKeyWindow];
}

- (void) makeMainWindow
{
  if (![self canBecomeMainWindow])
    return;
  [[NSApp mainWindow] resignMainWindow];
  [self becomeMainWindow];
}

- (void) orderBack: (id)sender
{
  [self orderWindow: NSWindowBelow relativeTo: 0];
}

- (void) orderFront: (id)sender
{
  if ([NSApp isActive] == YES)
    {
      [self orderWindow: NSWindowAbove relativeTo: 0];
    }
}

- (void) orderFrontRegardless
{
  [self orderWindow: NSWindowAbove relativeTo: 0];
}

- (void) orderOut: (id)sender
{
  [self orderWindow: NSWindowOut relativeTo: 0];
}

- (void) orderWindow: (NSWindowOrderingMode)place relativeTo: (int)otherWin
{
  NSGraphicsContext *context = GSCurrentContext();
  BOOL display = NO;

  if (place == NSWindowOut)
    {
      _f.visible = NO;
      if (_rFlags.needs_display == YES)
	{
	  /*
	   * Don't keep trying to update the window while it is ordered out
	   */
	  [[NSRunLoop currentRunLoop]
             cancelPerformSelector: @selector(_handleWindowNeedsDisplay:)
                            target: self
                          argument: nil];
	}
      [self _lossOfKeyOrMainWindow];
    }
  else
    {
      // create deferred window
      if(_windowNum == 0)
	{
	  [self _initBackendWindow: _frame];
	  display = YES;
	}
    }
  DPSorderwindow(context, place, otherWin, _windowNum);
  if (display)
    [self display];

  if (place != NSWindowOut)
    {
      if (_rFlags.needs_display == NO)
	{
	  /*
	   * Once we are ordered back in, we will want to update the window
	   * whenever there is anything to do.
	   */
	  [[NSRunLoop currentRunLoop]
		 performSelector: @selector(_handleWindowNeedsDisplay:)
			  target: self
			argument: nil
			   order: 600000
			   modes: [NSArray arrayWithObjects:
					   NSDefaultRunLoopMode,
					   NSModalPanelRunLoopMode,
					   NSEventTrackingRunLoopMode, nil]];
	}
      if (_f.has_closed == YES)
	{
	  _f.has_closed = NO;	/* A closed window has re-opened	*/
	}
      if (_f.has_opened == NO)
	{
	  _f.has_opened = YES;
	  if (_f.menu_exclude == NO)
	    {
	      BOOL	isFileName;

	      isFileName = [_windowTitle isEqual: _representedFilename];

	      [NSApp addWindowsItem: self
			      title: _windowTitle
			   filename: isFileName];
	    }
	}
      if ([self isKeyWindow] == YES)
	{
	  DPSsetinputstate(context, _windowNum, GSTitleBarKey);
	  DPSsetinputfocus(context, _windowNum);
	}
      _f.visible = YES;
    }
}

- (void) resignKeyWindow
{
  if (_f.is_key == YES)
    {
      NSNotificationCenter *nc = [NSNotificationCenter defaultCenter];

      if ((_firstResponder != self)
	&& [_firstResponder respondsToSelector: @selector(resignKeyWindow)])
	[_firstResponder resignKeyWindow];

      _f.is_key = NO;

      if (_f.is_main == YES)
	{
	  DPSsetinputstate(GSCurrentContext(), _windowNum, GSTitleBarMain);
	}
      else
	{
	  DPSsetinputstate(GSCurrentContext(), _windowNum, GSTitleBarNormal);
	}
      [self discardCursorRects];

      [nc postNotificationName: NSWindowDidResignKeyNotification object: self];
    }
}

- (void) resignMainWindow
{
  if (_f.is_main == YES)
    {
      NSNotificationCenter *nc = [NSNotificationCenter defaultCenter];

      _f.is_main = NO;
      if (_f.is_key == YES)
	{
	  DPSsetinputstate(GSCurrentContext(), _windowNum, GSTitleBarKey);
	}
      else
	{
	  DPSsetinputstate(GSCurrentContext(), _windowNum, GSTitleBarNormal);
	}
      [nc postNotificationName: NSWindowDidResignMainNotification object: self];
    }
}

- (void) setHidesOnDeactivate: (BOOL)flag
{
  if (flag != _f.hides_on_deactivate)
    {
      _f.hides_on_deactivate = flag;
    }
}

- (void) setLevel: (int)newLevel
{
  if (_windowLevel != newLevel)
    {
      NSGraphicsContext	*context = GSCurrentContext();

      _windowLevel = newLevel;
      if (_windowNum > 0)
	DPSsetwindowlevel(context, _windowLevel, _windowNum);
    }
}

/*
 * Moving and resizing the window
 */
- (NSPoint) cascadeTopLeftFromPoint: (NSPoint)topLeftPoint
{
  // FIXME: The implementation of this method is missing
  return NSZeroPoint;
}

- (void) center
{
  NSSize screenSize = [[NSScreen mainScreen] frame].size;
  NSPoint origin = _frame.origin;

  origin.x = (screenSize.width - _frame.size.width) / 2;
  origin.y = (screenSize.height - _frame.size.height) / 2;

  [self setFrameOrigin: origin];
}

- (NSRect) constrainFrameRect: (NSRect)frameRect toScreen: screen
{
  NSRect screenRect = [screen frame];
  float difference;

  /* Move top edge of the window inside the screen */
  difference = NSMaxY (frameRect) - NSMaxY (screenRect);

  if (difference > 0)
    {
      frameRect.origin.y -= difference;
    }
  
  /* If the window is resizable, resize it (if needed) so that the
     bottom edge is on the screen too */
  if (_styleMask & NSResizableWindowMask)
    {
      difference = screenRect.origin.y - frameRect.origin.y;
      if (difference > 0)
	{
	  frameRect.size.height -= difference;
	}
    }

  return frameRect;
}

- (NSRect) frame
{
  return _frame;
}

- (NSSize) minSize
{
  return _minimumSize;
}

- (NSSize) maxSize
{
  return _maximumSize;
}

- (void) setContentSize: (NSSize)aSize
{
  NSRect	r = _frame;

  r.size = aSize;
  r = [NSWindow frameRectForContentRect: r styleMask: _styleMask];
  r.origin = _frame.origin;
  [self setFrame: r display: YES];
}

- (void) setFrame: (NSRect)frameRect display: (BOOL)flag
{
  NSNotificationCenter	*nc = [NSNotificationCenter defaultCenter];

  frameRect = [self constrainFrameRect: frameRect toScreen: [self screen]];
  
  if (_maximumSize.width > 0 && frameRect.size.width > _maximumSize.width)
    {
      frameRect.size.width = _maximumSize.width;
    }
  if (_maximumSize.height > 0 && frameRect.size.height > _maximumSize.height)
    {
      frameRect.size.height = _maximumSize.height;
    }
  if (frameRect.size.width < _minimumSize.width)
    {
      frameRect.size.width = _minimumSize.width;
    }
  if (frameRect.size.height < _minimumSize.height)
    {
      frameRect.size.height = _minimumSize.height;
    }

  if (NSEqualSizes(frameRect.size, _frame.size) == NO)
    {
      if ([_delegate respondsToSelector: @selector(windowWillResize:toSize:)])
	{
	  frameRect.size = [_delegate windowWillResize: self
					       toSize: frameRect.size];
	}
    }

  if (NSEqualPoints(_frame.origin, frameRect.origin) == NO)
    [nc postNotificationName: NSWindowWillMoveNotification object: self];

  /*
   * Now we can tell the graphics context to do the actual resizing.
   * We will recieve an event to tell us when the resize is done.
   */
  if(_windowNum)
    DPSplacewindow(GSCurrentContext(), frameRect.origin.x, frameRect.origin.y,
		   frameRect.size.width, frameRect.size.height, _windowNum);
  else
    {
      _frame = frameRect;
      frameRect = [NSWindow contentRectForFrameRect: frameRect
			    styleMask: _styleMask];
      frameRect.origin = NSZeroPoint;
      [_wv setFrame: frameRect];
    }

  if (flag)
    [self display];
}

- (void) setFrameOrigin: (NSPoint)aPoint
{
  NSRect	r = _frame;

  r.origin = aPoint;
  [self setFrame: r display: NO];
}

- (void) setFrameTopLeftPoint: (NSPoint)aPoint
{
  NSRect	r = _frame;

  r.origin = aPoint;
  r.origin.y -= _frame.size.height;
  [self setFrame: r display: NO];
}

- (void) setMinSize: (NSSize)aSize
{
  if (aSize.width < 1)
    aSize.width = 1;
  if (aSize.height < 1)
    aSize.height = 1;
  _minimumSize = aSize;
  if (_windowNum > 0)
    DPSsetminsize(GSCurrentContext(), aSize.width, aSize.height, _windowNum);
}

- (void) setMaxSize: (NSSize)aSize
{
  /*
   * Documented maximum size for macOS-X - do we need this restriction?
   */
  if (aSize.width > 10000)
    aSize.width = 10000;
  if (aSize.height > 10000)
    aSize.height = 10000;
  _maximumSize = aSize;
  if (_windowNum > 0)
    DPSsetmaxsize(GSCurrentContext(), aSize.width, aSize.height, _windowNum);
}

- (NSSize) resizeIncrements
{
  return _increments;
}

- (void) setResizeIncrements: (NSSize)aSize
{
  _increments = aSize;
  if (_windowNum > 0)
    DPSsetresizeincrements(GSCurrentContext(), aSize.width, aSize.height,
			   _windowNum);
}

- (NSSize) aspectRatio
{
  // FIXME: This method is missing
  return NSMakeSize(1, 1); 
}

- (void) setAspectRatio: (NSSize)ratio
{
  // FIXME: This method is missing
}

/*
 * Converting coordinates
 */
- (NSPoint) convertBaseToScreen: (NSPoint)basePoint
{
  NSGraphicsContext	*context = GSCurrentContext();
  NSPoint		screenPoint;
  float			t, b, l, r;

  DPSstyleoffsets(context, &l, &r, &t, &b, _styleMask);
  screenPoint.x = _frame.origin.x + basePoint.x + l;
  screenPoint.y = _frame.origin.y + basePoint.y + b;

  return screenPoint;
}

- (NSPoint) convertScreenToBase: (NSPoint)screenPoint
{
  NSGraphicsContext	*context = GSCurrentContext();
  NSPoint 		basePoint;
  float			t, b, l, r;

  DPSstyleoffsets(context, &l, &r, &t, &b, _styleMask);
  basePoint.x = screenPoint.x - _frame.origin.x - l;
  basePoint.y = screenPoint.y - _frame.origin.y - b;

  return basePoint;
}

/*
 * Managing the display
 */
- (void) disableFlushWindow
{
  _disableFlushWindow++;
}

- (void) display
{
  if (_gstate == 0 || _f.visible == NO)
    return;

  _rFlags.needs_display = NO;
  // FIXME: Is the first responder processing needed here?
  if ((!_firstResponder) || (_firstResponder == self))
    if (_initialFirstResponder)
      [self makeFirstResponder: _initialFirstResponder];
  /*
   * inform first responder of it's status so it can set the focus to itself
   */
  [_firstResponder becomeFirstResponder];

  [self disableFlushWindow];
  [_wv display];
  [self enableFlushWindow];
  [self flushWindowIfNeeded];
}

- (void) displayIfNeeded
{
  if (_rFlags.needs_display)
    {
      [_wv displayIfNeeded];
      _rFlags.needs_display = NO;
    }
}

- (void) update
{
  NSNotificationCenter *nc = [NSNotificationCenter defaultCenter];

  /*
   *	if autodisplay is enabled and window display
   */
  if (_f.is_autodisplay && _rFlags.needs_display)
    {
      [self disableFlushWindow];
      [self displayIfNeeded];
      [self enableFlushWindow];
      [self flushWindowIfNeeded];
    }
  [GSCurrentContext() flush];
  [nc postNotificationName: NSWindowDidUpdateNotification object: self];
}

- (void) flushWindowIfNeeded
{
  if (_disableFlushWindow == 0 && _f.needs_flush == YES)
    {
      _f.needs_flush = NO;
      [self flushWindow];
    }
}

- (void) flushWindow
{
  int i;
  NSGraphicsContext* context = GSCurrentContext();

  // do nothing if backing is not buffered
  if (_backingType == NSBackingStoreNonretained)
    {
      [context flush];
      return;
    }

  if (_disableFlushWindow)		// if flushWindow is called
    {					// while flush is disabled
      _f.needs_flush = YES;		// mark self as needing a
      return;				// flush, then return
    }

  /* Check for special case of flushing while we are lock focused.
     For instance, when we are highlighting a button. */
  if (NSIsEmptyRect(_rectNeedingFlush))
    {
      if ([_rectsBeingDrawn count] == 0)
	{
	  _f.needs_flush = NO;
	  return;
	}
    }

  /*
   * Accumulate the rectangles from all nested focus locks.
   */
  i = [_rectsBeingDrawn count];
  while (i-- > 0)
    {
      _rectNeedingFlush = NSUnionRect(_rectNeedingFlush,
       [[_rectsBeingDrawn objectAtIndex: i] rectValue]);
    }

  if (_windowNum)
    DPSflushwindowrect(context,
		       NSMinX(_rectNeedingFlush), NSMinY(_rectNeedingFlush),
		       NSWidth(_rectNeedingFlush), NSHeight(_rectNeedingFlush),
		       _windowNum);
  _f.needs_flush = NO;
  _rectNeedingFlush = NSZeroRect;
}

- (void) enableFlushWindow
{
  if (_disableFlushWindow > 0)
    {
      _disableFlushWindow--;
    }
}

- (BOOL) isAutodisplay
{
  return _f.is_autodisplay;
}

- (BOOL) isFlushWindowDisabled
{
  return _disableFlushWindow == 0 ? NO : YES;
}

- (void) setAutodisplay: (BOOL)flag
{
  _f.is_autodisplay = flag;
}

- (void) setViewsNeedDisplay: (BOOL)flag
{
  if (_rFlags.needs_display != flag)
    {
      _rFlags.needs_display = flag;
      if (flag)
	{
	  [NSApp setWindowsNeedUpdate: YES];
	  if (_f.visible && _f.has_opened)
	    {
	      [[NSRunLoop currentRunLoop]
		 performSelector: @selector(_handleWindowNeedsDisplay:)
			  target: self
			argument: nil
			   order: 600000 /*NSDisplayWindowRunLoopOrdering OS*/
			   modes: [NSArray arrayWithObjects:
					   NSDefaultRunLoopMode,
					   NSModalPanelRunLoopMode,
					   NSEventTrackingRunLoopMode, nil]];
	    }
	}
      else
	{
	  [[NSRunLoop currentRunLoop]
		 cancelPerformSelector: @selector(_handleWindowNeedsDisplay:)
				target: self
			      argument: nil];
	}
    }
}

- (BOOL) viewsNeedDisplay
{
  return _rFlags.needs_display;
}

- (void) cacheImageInRect: (NSRect)aRect
{
  // FIXME: This Method is missing
}

- (void) discardCachedImage
{
  // FIXME: This Method is missing
}

- (void) restoreCachedImage
{
  // FIXME: This Method is missing
}

- (void) useOptimizedDrawing: (BOOL)flag
{
  _f.optimize_drawing = flag;
}

- (BOOL) canStoreColor
{
  if (_depthLimit > 1)
    return YES;
  else
    return NO;
}

- (NSScreen*) deepestScreen
{
  // FIXME: We must check the screens the window is on
  return [NSScreen deepestScreen];
}

- (NSWindowDepth) depthLimit
{
  return _depthLimit;
}

- (BOOL) hasDynamicDepthLimit
{
  return _f.dynamic_depth_limit;
}

- (NSScreen*) screen
{
  // FIXME: Works only if there is only one screen
  return [NSScreen mainScreen];
}

- (void) setDepthLimit: (NSWindowDepth)limit
{
  if (limit == 0)
    limit = [[self class] defaultDepthLimit];

  _depthLimit = limit;
}

- (void) setDynamicDepthLimit: (BOOL)flag
{
  _f.dynamic_depth_limit = flag;
}

/*
 * Cursor management
 */
- (BOOL) areCursorRectsEnabled
{
  return _f.cursor_rects_enabled;
}

- (void) disableCursorRects
{
  _f.cursor_rects_enabled = NO;
}

static void
discardCursorRectsForView(NSView *theView)
{
  if (theView != nil)
    {
      if (((NSViewPtr)theView)->_rFlags.has_currects)
	{
	  [theView discardCursorRects];
	}

      if (((NSViewPtr)theView)->_rFlags.has_subviews)
	{
	  NSArray	*s = ((NSViewPtr)theView)->_sub_views;
	  unsigned	count = [s count];

	  if (count)
	    {
	      NSView	*subs[count];
	      unsigned	i;

	      [s getObjects: subs];
	      for (i = 0; i < count; i++)
		{
		  discardCursorRectsForView(subs[i]);
		}
	    }
	}
    }
}

- (void) discardCursorRects
{
  discardCursorRectsForView(_wv);
}

- (void) enableCursorRects
{
  _f.cursor_rects_enabled = YES;
}

- (void) invalidateCursorRectsForView: (NSView*)aView
{
  if (((NSViewPtr)aView)->_rFlags.valid_rects)
    {
      [((NSViewPtr)aView)->_cursor_rects
	makeObjectsPerformSelector: @selector(invalidate)];
      ((NSViewPtr)aView)->_rFlags.valid_rects = 0;
      _f.cursor_rects_valid = NO;
    }
}

static void
resetCursorRectsForView(NSView *theView)
{
  if (theView != nil)
    {
      [theView resetCursorRects];

      if (((NSViewPtr)theView)->_rFlags.has_subviews)
	{
	  NSArray	*s = ((NSViewPtr)theView)->_sub_views;
	  unsigned	count = [s count];

	  if (count)
	    {
	      NSView	*subs[count];
	      unsigned	i;

	      [s getObjects: subs];
	      for (i = 0; i < count; i++)
		{
		  resetCursorRectsForView(subs[i]);
		}
	    }
	}
    }
}

- (void) resetCursorRects
{
  [self discardCursorRects];
  resetCursorRectsForView(_wv);
  _f.cursor_rects_valid = YES;
}

/*
 * Handling user actions and events
 */
- (void) close
{
  NSNotificationCenter *nc = [NSNotificationCenter defaultCenter];
  CREATE_AUTORELEASE_POOL(pool);

  [nc postNotificationName: NSWindowWillCloseNotification object: self];
  _f.has_opened = NO;
  [[NSRunLoop currentRunLoop]
	 cancelPerformSelector: @selector(_handleWindowNeedsDisplay:)
			target: self
		      argument: nil];
  [NSApp removeWindowsItem: self];
  [self orderOut: self];
  RELEASE(pool);
  if (_f.has_closed == NO)
    {
      _f.has_closed = YES;
      if (_f.is_released_when_closed)
	{
	  RELEASE(self);
	}
    }
  else
    {
      NSWarnMLog(@"closing window (%@) that's already closed.", self);
    }
}

/* Private Method. Many X Window managers will just deminiaturize us without
   telling us to do it ourselves. Deal with it.
*/
- (void) _didDeminiaturize: sender
{
  NSNotificationCenter *nc = [NSNotificationCenter defaultCenter];

  _f.is_miniaturized = NO;
  [nc postNotificationName: NSWindowDidDeminiaturizeNotification object: self];
}

- (void) deminiaturize: sender
{
  if (_counterpart != 0)
    {
      NSWindow		*mini = GSWindowWithNumber(_counterpart);

      [mini orderOut: self];
    }
  _f.is_miniaturized = NO;
  [self makeKeyAndOrderFront: self];
  [self _didDeminiaturize: sender];
}

- (BOOL) isDocumentEdited
{
  return _f.is_edited;
}

- (BOOL) isReleasedWhenClosed
{
  return _f.is_released_when_closed;
}

- (void) miniaturize: (id)sender
{
  NSNotificationCenter *nc = [NSNotificationCenter defaultCenter];
  
  [nc postNotificationName: NSWindowWillMiniaturizeNotification
		    object: self];
  
  _f.is_miniaturized = YES;
  /*
   * Ensure that we have a miniwindow counterpart.
   */
  if (_counterpart == 0)
    {
      NSWindow		*mini;
      NSMiniWindowView	*v;
      
      mini = [[NSMiniWindow alloc] initWithContentRect: NSMakeRect(0,0,64,64)
					     styleMask: NSMiniWindowMask
					       backing: NSBackingStoreBuffered
						 defer: NO];
      mini->_counterpart = [self windowNumber];
      _counterpart = [mini windowNumber];
      v = [[NSMiniWindowView alloc] initWithFrame: NSMakeRect(0,0,64,64)];
      [v setImage: [self miniwindowImage]];
      [v setTitle: [self miniwindowTitle]];
      [mini setContentView: v];
      RELEASE(v);
    }
  [self _lossOfKeyOrMainWindow];
  DPSminiwindow(GSCurrentContext(), _windowNum);
  
  [nc postNotificationName: NSWindowDidMiniaturizeNotification
		    object: self];
}

- (void) performClose: (id)sender
{
  /* self must have a close button in order to be closed */
  if (!(_styleMask & NSClosableWindowMask))
    {
      NSBeep();
      return;
    }

  if (_windowController)
    {
      NSDocument *document = [_windowController document];

      if (document && (document != _delegate)
            && [document respondsToSelector: @selector(windowShouldClose:)]
              && ![document windowShouldClose: self])
        {
          NSBeep();
          return;
        }
    }
  if ([_delegate respondsToSelector: @selector(windowShouldClose:)])
    {
      /*
       *	if delegate responds to windowShouldClose query it to see if
       *	it's ok to close the window
       */
      if (![_delegate windowShouldClose: self])
	{
	  NSBeep();
	  return;
	}
    }
  else
    {
      /*
       *	else if self responds to windowShouldClose query
       *	self to see if it's ok to close self
       */
      if ([self respondsToSelector: @selector(windowShouldClose:)])
	{
	  if (![self windowShouldClose: self])
	    {
	      NSBeep();
	      return;
	    }
	}
    }

  // FIXME: The button should be highlighted
  [self close];
}

- (BOOL) performKeyEquivalent: (NSEvent*)theEvent
{
  if (_contentView)
    return [_contentView performKeyEquivalent: theEvent];
  return NO;
}

- (void) performMiniaturize: (id)sender
{
  if (!(_styleMask & (NSIconWindowMask | NSMiniWindowMask)))
    {
      // FIXME: The button should be highlighted
      [self miniaturize: sender];
    }
  else
    {
      NSBeep();
    }
}

- (int) resizeFlags
{
  // FIXME: The implementation is missing
  return 0;
}

- (void) setDocumentEdited: (BOOL)flag
{
  if (_f.is_edited != flag)
    {
      _f.is_edited = flag;
      if (_f.menu_exclude == NO && _f.has_opened == YES)
	{
	  [NSApp updateWindowsItem: self];
	}
      DPSdocedited(GSCurrentContext(), flag, _windowNum);
    }
}

- (void) setReleasedWhenClosed: (BOOL)flag
{
  _f.is_released_when_closed = flag;
}

/*
 * Aiding event handling
 */
- (BOOL) acceptsMouseMovedEvents
{
  return _f.accepts_mouse_moved;
}

- (NSEvent*) currentEvent
{
  return [NSApp currentEvent];
}

- (void) discardEventsMatchingMask: (unsigned int)mask
		       beforeEvent: (NSEvent*)lastEvent
{
  [NSApp discardEventsMatchingMask: mask beforeEvent: lastEvent];
}

- (NSResponder*) firstResponder
{
  return _firstResponder;
}

- (BOOL) acceptsFirstResponder
{
  return YES;
}

- (BOOL) makeFirstResponder: (NSResponder*)aResponder
{
  if (_firstResponder == aResponder)
    return YES;

  if (![aResponder isKindOfClass: responderClass])
    return NO;

  if (![aResponder acceptsFirstResponder])
    return NO;

  /*
   * If there is a first responder tell it to resign.
   * Change only if it replies Y
   */
  if ((_firstResponder) && (![_firstResponder resignFirstResponder]))
    return NO;

  _firstResponder = aResponder;
  if (![_firstResponder becomeFirstResponder])
    {
      _firstResponder = self;
      [_firstResponder becomeFirstResponder];
      return NO;
    }

  return YES;
}

- (void) setInitialFirstResponder: (NSView*)aView
{
  if ([aView isKindOfClass: viewClass])
    {
      ASSIGN(_initialFirstResponder, aView);
    }
}

- (NSView*) initialFirstResponder
{
  return _initialFirstResponder;
}

- (void) keyDown: (NSEvent*)theEvent
{
  NSString *characters = [theEvent characters];
  unichar character = 0;

  if ([characters length] > 0)
    {
      character = [characters characterAtIndex: 0];
    }

  // If this is a TAB or TAB+SHIFT event, move to the next key view
  if (character == NSTabCharacter)
    {
      if ([theEvent modifierFlags] & NSShiftKeyMask)
	[self selectPreviousKeyView: self];
      else
	[self selectNextKeyView: self];
      return;
    }

  // If this is an ESC event, abort modal loop
  if (character == 0x001b)
    {
      if ([NSApp modalWindow] == self)
	{
	  // NB: The following *never* returns.
	  [NSApp abortModal];
	}
      return;
    }

  if(character == NSEnterCharacter ||
     character == NSFormFeedCharacter ||
     character == NSCarriageReturnCharacter)
    {
      if(_defaultButtonCell && _f.default_button_cell_key_disabled == NO)
	{
	  [_defaultButtonCell performClick:self];
	  return;
	}
    }

  // Discard null character events such as a Shift event after a tab key
  if([characters length] == 0)
    return;

  // Try to process the event as a key equivalent
  // without Command having being pressed
  {
    NSEvent *new_event
      =  [NSEvent keyEventWithType: [theEvent type]
		  location: NSZeroPoint
		  modifierFlags: ([theEvent modifierFlags] | NSCommandKeyMask)
		  timestamp: [theEvent timestamp]
		  windowNumber: [theEvent windowNumber]
		  context: [theEvent context]
		  characters: characters
		  charactersIgnoringModifiers: [theEvent
						 charactersIgnoringModifiers]
		  isARepeat: [theEvent isARepeat]
		  keyCode: [theEvent keyCode]];
    if ([self performKeyEquivalent: new_event])
      return;
  }

  // Otherwise, pass the event up
  [super keyDown: theEvent];
}

/* Return mouse location in reciever's base coord system, ignores event
 * loop status */
- (NSPoint) mouseLocationOutsideOfEventStream
{
  NSPoint	p;

  DPSmouselocation(GSCurrentContext(), &p.x, &p.y);
  p = [self convertScreenToBase: p];
  return p;
}

- (NSEvent*) nextEventMatchingMask: (unsigned int)mask
{
  return [NSApp nextEventMatchingMask: mask
			    untilDate: nil
			       inMode: NSEventTrackingRunLoopMode
			      dequeue: YES];
}

- (NSEvent*) nextEventMatchingMask: (unsigned int)mask
			 untilDate: (NSDate*)expiration
			    inMode: (NSString*)mode
			   dequeue: (BOOL)deqFlag
{
  return [NSApp nextEventMatchingMask: mask
			    untilDate: expiration
			       inMode: mode
			      dequeue: deqFlag];
}

- (void) postEvent: (NSEvent*)event atStart: (BOOL)flag
{
  [NSApp postEvent: event atStart: flag];
}

- (void) setAcceptsMouseMovedEvents: (BOOL)flag
{
  _f.accepts_mouse_moved = flag;
}

- (void) _checkTrackingRectangles: (NSView*)theView
			 forEvent: (NSEvent*)theEvent
{
  if (((NSViewPtr)theView)->_rFlags.has_trkrects)
    {
      NSArray	*tr = ((NSViewPtr)theView)->_tracking_rects;
      unsigned	count = [tr count];

      /*
       * Loop through the tracking rectangles
       */
      if (count > 0)
	{
	  GSTrackingRect	*rects[count];
	  NSPoint		loc = [theEvent locationInWindow];
	  unsigned		i;

	  [tr getObjects: rects];

	  for (i = 0; i < count; ++i)
	    {
	      BOOL		last;
	      BOOL		now;
	      GSTrackingRect	*r = rects[i];

	      /* Check mouse at last point */
	      last = NSMouseInRect(_lastPoint, r->rectangle, NO);
	      /* Check mouse at current point */
	      now = NSMouseInRect(loc, r->rectangle, NO);

	      if ((!last) && (now))		// Mouse entered event
		{
		  if (r->flags.checked == NO)
		    {
		      if ([r->owner respondsToSelector:
			@selector(mouseEntered:)])
			r->flags.ownerRespondsToMouseEntered = YES;
		      if ([r->owner respondsToSelector:
			@selector(mouseExited:)])
			r->flags.ownerRespondsToMouseExited = YES;
		      r->flags.checked = YES;
		    }
		  if (r->flags.ownerRespondsToMouseEntered)
		    {
		      NSEvent	*e;

		      e = [NSEvent enterExitEventWithType: NSMouseEntered
			location: loc
			modifierFlags: [theEvent modifierFlags]
			timestamp: 0
			windowNumber: [theEvent windowNumber]
			context: NULL
			eventNumber: 0
			trackingNumber: r->tag
			userData: r->user_data];
		      [r->owner mouseEntered: e];
		    }
		}

	      if ((last) && (!now))		// Mouse exited event
		{
		  if (r->flags.checked == NO)
		    {
		      if ([r->owner respondsToSelector:
			@selector(mouseEntered:)])
			r->flags.ownerRespondsToMouseEntered = YES;
		      if ([r->owner respondsToSelector:
			@selector(mouseExited:)])
			r->flags.ownerRespondsToMouseExited = YES;
		      r->flags.checked = YES;
		    }
		  if (r->flags.ownerRespondsToMouseExited)
		    {
		      NSEvent	*e;

		      e = [NSEvent enterExitEventWithType: NSMouseExited
			location: loc
			modifierFlags: [theEvent modifierFlags]
			timestamp: 0
			windowNumber: [theEvent windowNumber]
			context: NULL
			eventNumber: 0
			trackingNumber: r->tag
			userData: r->user_data];
		      [r->owner mouseExited: e];
		    }
		}
	    }
	}
    }

  /*
   * Check tracking rectangles for the subviews
   */
  if (((NSViewPtr)theView)->_rFlags.has_subviews)
    {
      NSArray	*sb = ((NSViewPtr)theView)->_sub_views;
      unsigned	count = [sb count];

      if (count > 0)
	{
	  NSView	*subs[count];
	  unsigned	i;

	  [sb getObjects: subs];
	  for (i = 0; i < count; ++i)
	    (*ctImp)(self, ctSel, subs[i], theEvent);
	}
    }
}

- (void) _checkCursorRectangles: (NSView*)theView forEvent: (NSEvent*)theEvent
{
  if (((NSViewPtr)theView)->_rFlags.valid_rects)
    {
      NSArray	*tr = ((NSViewPtr)theView)->_cursor_rects;
      unsigned	count = [tr count];

      // Loop through cursor rectangles
      if (count > 0)
	{
	  GSTrackingRect	*rects[count];
	  NSPoint		loc = [theEvent locationInWindow];
	  unsigned		i;

	  [tr getObjects: rects];

	  for (i = 0; i < count; ++i)
	    {
	      GSTrackingRect	*r = rects[i];
	      BOOL		last;
	      BOOL		now;

	      if ([r isValid] == NO)
		continue;

	      /*
	       * Check for presence of point in rectangle.
	       */
	      last = NSMouseInRect(_lastPoint, r->rectangle, NO);
	      now = NSMouseInRect(loc, r->rectangle, NO);

	      // Mouse entered
	      if ((!last) && (now))
		{
		  NSEvent	*e;

		  e = [NSEvent enterExitEventWithType: NSCursorUpdate
		    location: loc
		    modifierFlags: [theEvent modifierFlags]
		    timestamp: 0
		    windowNumber: [theEvent windowNumber]
		    context: [theEvent context]
		    eventNumber: 0
		    trackingNumber: (int)YES
		    userData: (void*)r];
		  [self postEvent: e atStart: YES];
		}
	      // Mouse exited
	      if ((last) && (!now))
		{
		  NSEvent	*e;

		  e = [NSEvent enterExitEventWithType: NSCursorUpdate
		    location: loc
		    modifierFlags: [theEvent modifierFlags]
		    timestamp: 0
		    windowNumber: [theEvent windowNumber]
		    context: [theEvent context]
		    eventNumber: 0
		    trackingNumber: (int)NO
		    userData: (void*)r];
		  [self postEvent: e atStart: YES];
		}
	    }
	}
    }

  /*
   * Check cursor rectangles for the subviews
   */
  if (((NSViewPtr)theView)->_rFlags.has_subviews)
    {
      NSArray	*sb = ((NSViewPtr)theView)->_sub_views;
      unsigned	count = [sb count];

      if (count > 0)
	{
	  NSView	*subs[count];
	  unsigned	i;

	  [sb getObjects: subs];
	  for (i = 0; i < count; ++i)
	    (*ccImp)(self, ccSel, subs[i], theEvent);
	}
    }
}

- (void) _processResizeEvent
{
  if (_windowNum && _gstate)
    {
      NSGraphicsContext	*context = GSCurrentContext();
      DPSgsave(context);
      DPSsetgstate(context, _gstate);
      DPSupdatewindow(context, _windowNum);
      DPScurrentgstate(context, _gstate);
      DPSpop(context);
      DPSgrestore(context);
    }

  [self update];
}


- (void) sendEvent: (NSEvent*)theEvent
{
  NSView	*v;
  NSEventType	type;

  if (!_f.cursor_rects_valid)
    {
      [self resetCursorRects];
    }

  type = [theEvent type];
  switch (type)
    {
      case NSLeftMouseDown:				  // Left mouse down
	{
	  BOOL	wasKey = _f.is_key;

	  if ([NSApp isActive] == NO && self != [NSApp iconWindow])
	    {
	      [NSApp activateIgnoringOtherApps: YES];
	    }
	  if (_f.is_key == NO)
	    {
	      [self makeKeyAndOrderFront: self];
	    }
	  v = [_contentView hitTest: [theEvent locationInWindow]];
	  if (_firstResponder != v)
	    {
	      [self makeFirstResponder: v];
	    }
	  if (wasKey == YES || [v acceptsFirstMouse: theEvent] == YES)
	    {
	      if ([NSHelpManager isContextHelpModeActive])
		{
		  [v helpRequested: theEvent];
		}
	      else
		{
		  [v mouseDown: theEvent];
		}
	    }
	  _lastPoint = [theEvent locationInWindow];
	  break;
	}

      case NSLeftMouseUp:				  // Left mouse up
	v = _firstResponder;	/* Send to the view that got the mouse down. */
	[v mouseUp: theEvent];
	_lastPoint = [theEvent locationInWindow];
	break;

      case NSMiddleMouseDown:				  // Middle mouse down
	v = [_contentView hitTest: [theEvent locationInWindow]];
	[v middleMouseDown: theEvent];
	_lastPoint = [theEvent locationInWindow];
	break;

      case NSMiddleMouseUp:				  // Middle mouse up
	v = [_contentView hitTest: [theEvent locationInWindow]];
	[v middleMouseUp: theEvent];
	_lastPoint = [theEvent locationInWindow];
	break;

      case NSRightMouseDown:				  // Right mouse down
	v = [_contentView hitTest: [theEvent locationInWindow]];
	[v rightMouseDown: theEvent];
	_lastPoint = [theEvent locationInWindow];
	break;

      case NSRightMouseUp:				  // Right mouse up
	v = [_contentView hitTest: [theEvent locationInWindow]];
	[v rightMouseUp: theEvent];
	_lastPoint = [theEvent locationInWindow];
	break;

      case NSLeftMouseDragged:				// Left mouse dragged
      case NSMiddleMouseDragged:			// Middle mouse dragged
      case NSRightMouseDragged:				// Right mouse dragged
      case NSMouseMoved:				// Mouse moved
	switch (type)
	  {
	    case NSLeftMouseDragged:
	      v = [_contentView hitTest: [theEvent locationInWindow]];
	      [v mouseDragged: theEvent];
	      break;
	    case NSMiddleMouseDragged:
	      v = [_contentView hitTest: [theEvent locationInWindow]];
	      [v middleMouseDragged: theEvent];
	      break;
	    case NSRightMouseDragged:
	      v = [_contentView hitTest: [theEvent locationInWindow]];
	      [v rightMouseDragged: theEvent];
	      break;
	    default:
	      if (_f.accepts_mouse_moved)
		{
		  /*
		   * If the window is set to accept mouse movements, we need to
		   * forward the mouse movement to the correct view.
		   */
		  v = [_contentView hitTest: [theEvent locationInWindow]];
		  [v mouseMoved: theEvent];
		}
	      break;
	  }

	/*
	 * We need to go through all of the views, and if there is any with
	 * a tracking rectangle then we need to determine if we should send
	 * a NSMouseEntered or NSMouseExited event.
	 */
	(*ctImp)(self, ctSel, _contentView, theEvent);

	if (_f.is_key)
	  {
	    /*
	     * We need to go through all of the views, and if there is any with
	     * a cursor rectangle then we need to determine if we should send a
	     * cursor update event.
	     */
	    (*ccImp)(self, ccSel, _contentView, theEvent);
	  }

	_lastPoint = [theEvent locationInWindow];
	break;

      case NSMouseEntered:				  // Mouse entered
      case NSMouseExited:				  // Mouse exited
	break;

      case NSKeyDown:
	/*
	 * Save the first responder so that the key up goes to it and not a
	 * possible new first responder.
	 */
	_originalResponder = _firstResponder;
	[_firstResponder keyDown: theEvent];
	break;

      case NSKeyUp:					      // Key up
	  /*
	   * send message to the object that got the key down
	   */
	  if (_originalResponder)
	    [_originalResponder keyUp: theEvent];
	  break;

      case NSFlagsChanged:				  // Flags changed
	  break;

      case NSCursorUpdate:				  // Cursor update
	{
	  GSTrackingRect	*r =(GSTrackingRect*)[theEvent userData];
	  NSCursor		*c = (NSCursor*)[r owner];

	  if ([theEvent trackingNumber])	  // It's a mouse entered
	    {
	      [c mouseEntered: theEvent];
	    }
	  else					  // it is a mouse exited
	    {
	      [c mouseExited: theEvent];
	    }
	}
	break;

      case NSAppKitDefined:
	{
	  id                    dragInfo;
	  int                   action;
	  NSEvent               *e;
	  GSAppKitSubtype	sub = [theEvent subtype];
	  NSNotificationCenter	*nc = [NSNotificationCenter defaultCenter];

	  switch (sub)
	    {
	    case GSAppKitWindowMoved:
	      _frame.origin.x = (float)[theEvent data1];
	      _frame.origin.y = (float)[theEvent data2];
	      NSDebugLLog(@"Moving", @"Move event: %d %@",
			  _windowNum, NSStringFromPoint(_frame.origin));
	      if (_autosaveName != nil)
		{
		  [self saveFrameUsingName: _autosaveName];
		}
	      [nc postNotificationName: NSWindowDidMoveNotification
		  object: self];
	      break;
	      
	    case GSAppKitWindowResized:
	      _frame.size.width = (float)[theEvent data1];
	      _frame.size.height = (float)[theEvent data2];
	      if (_autosaveName != nil)
		{
		  [self saveFrameUsingName: _autosaveName];
		}
	      {
		NSRect	rect = _frame;
		
		rect = [NSWindow contentRectForFrameRect: rect
				               styleMask: _styleMask];
		rect.origin = NSZeroPoint;
		[_wv setFrame: rect];
		[_wv setNeedsDisplay: YES];
	      }
	      [self _processResizeEvent];
	      [nc postNotificationName: NSWindowDidResizeNotification
		                object: self];
	      break;

	    case GSAppKitWindowClose:
	      [self performClose: NSApp];
	      break;
		
	    case GSAppKitWindowMiniaturize:
	      [self performMiniaturize: NSApp];
	      break;

	    case GSAppKitWindowFocusIn:
	      if (_f.is_miniaturized)
		{
		  /* Window Manager just deminiaturized us */
		  [self _didDeminiaturize: self];
		}
	      if ([self canBecomeKeyWindow] == YES)
		{
		  [self makeKeyWindow];
		  [self makeMainWindow];
		  [NSApp activateIgnoringOtherApps: YES];
		}
	      break;

	    case GSAppKitWindowFocusOut:
	      break;


#define     GSPerformDragSelector(view, sel, info, action)		     \
		if (view == _contentView && _delegate)			     \
                  action = (int)[_delegate performSelector: sel withObject:   \
					    info];			     \
		else							     \
		  action = (int)[view performSelector: sel withObject: info]
#define     GSPerformVoidDragSelector(view, sel, info)			\
		if (view == _contentView && _delegate)			\
                  [_delegate performSelector: sel withObject: info];	\
		else							\
		  [view performSelector: sel withObject: info]

	    case GSAppKitDraggingEnter:
	    case GSAppKitDraggingUpdate:
	      v = [_contentView hitTest: [theEvent locationInWindow]];
	      if (!v)
		v = _contentView;
	      dragInfo = [GSCurrentContext() _dragInfo];
	      if (_lastDragView && _lastDragView != v && _f.accepts_drag)
		{
		  GSPerformVoidDragSelector(_lastDragView,
				      @selector(draggingExited:), dragInfo);
		}
	      _f.accepts_drag = GSViewAcceptsDrag(v, dragInfo);
	      if (_lastDragView != v && _f.accepts_drag)
		{
		  GSPerformDragSelector(v, @selector(draggingEntered:),
				      dragInfo, action);
		}
	      else
		{
		  GSPerformDragSelector(v, @selector(draggingUpdated:),
				      dragInfo, action);
		}
	      e = [NSEvent otherEventWithType: NSAppKitDefined
			   location: [theEvent locationInWindow]
			   modifierFlags: 0
			   timestamp: 0
			   windowNumber: _windowNum
			   context: GSCurrentContext()
			   subtype: GSAppKitDraggingStatus
			   data1: [theEvent data1]
			   data2: action];
	      [GSCurrentContext() _postExternalEvent: e];
	      _lastDragView = v;
	      break;

	    case GSAppKitDraggingStatus:
	      NSDebugLLog(@"NSDragging",
		@"Internal: dropped GSAppKitDraggingStatus event");
	      break;

	    case GSAppKitDraggingExit:
	      dragInfo = [GSCurrentContext() _dragInfo];
	      if (_lastDragView && _f.accepts_drag)
		{
		  GSPerformDragSelector(_lastDragView,
				      @selector(draggingExited:), dragInfo,
				      action);
		}
	      _lastDragView = nil;
	      break;

	    case GSAppKitDraggingDrop:
	      if (_lastDragView && _f.accepts_drag)
		{
	          dragInfo = [GSCurrentContext() _dragInfo];
		  GSPerformDragSelector(_lastDragView,
					@selector(prepareForDragOperation:),
					dragInfo, action);
		  if (action)
		    {
		      GSPerformDragSelector(_lastDragView,
					  @selector(performDragOperation:),
					  dragInfo, action);
		    }
		  if (action)
		    {
		      GSPerformVoidDragSelector(_lastDragView,
					  @selector(concludeDragOperation:),
					  dragInfo);
		    }
		}
	      _lastDragView = nil;
	      e = [NSEvent otherEventWithType: NSAppKitDefined
			   location: [theEvent locationInWindow]
			   modifierFlags: 0
			   timestamp: 0
			   windowNumber: _windowNum
			   context: GSCurrentContext()
			   subtype: GSAppKitDraggingFinished
			   data1: [theEvent data1]
			   data2: 0];
	      [GSCurrentContext() _postExternalEvent: e];
	      break;

	    case GSAppKitDraggingFinished:
	      _lastDragView = nil;
	      NSDebugLLog(@"NSDragging",
		@"Internal: dropped GSAppKitDraggingFinished event");
	      break;

	    default:
	      break;
	    }
	}
	break;

      case NSPeriodic:
      case NSSystemDefined:
      case NSApplicationDefined:
	break;
    }
}

- (BOOL) tryToPerform: (SEL)anAction with: (id)anObject
{
  // FIXME: On NO we should hand it on to the delegate
  return ([super tryToPerform: anAction with: anObject]);
}

- (BOOL) worksWhenModal
{
  return NO;
}

- (void) selectKeyViewFollowingView: (NSView*)aView
{
  NSView *theView = nil;

  if ([aView isKindOfClass: viewClass])
    theView = [aView nextValidKeyView];
  if (theView)
    {
      [self makeFirstResponder: theView];
      if ([theView respondsToSelector:@selector(selectText:)])
	{
	  _selectionDirection =  NSSelectingNext;
	  [(id)theView selectText: self];
	  _selectionDirection =  NSDirectSelection;
      	}
    }
}

- (void) selectKeyViewPrecedingView: (NSView*)aView
{
  NSView *theView = nil;

  if ([aView isKindOfClass: viewClass])
    theView = [aView previousValidKeyView];
  if (theView)
    {
      [self makeFirstResponder: theView];
      if ([theView respondsToSelector:@selector(selectText:)])
	{
	  _selectionDirection =  NSSelectingPrevious;
	  [(id)theView selectText: self];
	  _selectionDirection =  NSDirectSelection;
	}
    }
}

- (void) selectNextKeyView: (id)sender
{
  NSView *theView = nil;

  if ([_firstResponder isKindOfClass: viewClass])
    theView = [_firstResponder nextValidKeyView];

  if ((theView == nil) && (_initialFirstResponder))
    {
      if ([_initialFirstResponder acceptsFirstResponder])
	theView = _initialFirstResponder;
      else
	theView = [_initialFirstResponder nextValidKeyView];
    }

  if (theView)
    {
      [self makeFirstResponder: theView];
      if ([theView respondsToSelector:@selector(selectText:)])
	{
	  _selectionDirection =  NSSelectingNext;
	  [(id)theView selectText: self];
	  _selectionDirection =  NSDirectSelection;
	}
    }
}

- (void) selectPreviousKeyView: (id)sender
{
  NSView *theView = nil;

  if ([_firstResponder isKindOfClass: viewClass])
    theView = [_firstResponder previousValidKeyView];

  if ((theView == nil) && (_initialFirstResponder))
    {
      if ([_initialFirstResponder acceptsFirstResponder])
	theView = _initialFirstResponder;
      else
	theView = [_initialFirstResponder previousValidKeyView];
    }

  if (theView)
    {
      [self makeFirstResponder: theView];
      if ([theView respondsToSelector:@selector(selectText:)])
	{
	  _selectionDirection =  NSSelectingPrevious;
	  [(id)theView selectText: self];
	  _selectionDirection =  NSDirectSelection;
	}
    }
}

// This is invoked by selectText: of some views (eg matrixes),
// to know whether they have received it from the window, and
// if so, in which direction is the selection moving (so that they know
// if they should select the last or the first editable cell).
- (NSSelectionDirection) keyViewSelectionDirection
{
  return _selectionDirection;
}

/*
 * Dragging
 */
- (void) dragImage: (NSImage*)anImage
	        at: (NSPoint)baseLocation
	    offset: (NSSize)initialOffset
	     event: (NSEvent*)event
        pasteboard: (NSPasteboard*)pboard
	    source: (id)sourceObject
	 slideBack: (BOOL)slideFlag
{
  [_wv dragImage: anImage
	      at: baseLocation
	  offset: initialOffset
	   event: event
      pasteboard: pboard
	  source: sourceObject
       slideBack: slideFlag];
}

- (void) registerForDraggedTypes: (NSArray*)newTypes
{
  [_wv registerForDraggedTypes: newTypes];
}

- (void) unregisterDraggedTypes
{
  [_wv unregisterDraggedTypes];
}

/*
 * Services and windows menu support
 */
- (BOOL) isExcludedFromWindowsMenu
{
  return _f.menu_exclude;
}

- (void) setExcludedFromWindowsMenu: (BOOL)flag
{
  if (_f.menu_exclude != flag)
    {
      _f.menu_exclude = flag;
      if (_f.has_opened == YES)
	{
	  if (_f.menu_exclude == NO)
	    {
	      BOOL	isFileName;

	      isFileName = [_windowTitle isEqual: _representedFilename];

	      [NSApp addWindowsItem: self
			      title: _windowTitle
			   filename: isFileName];
	    }
	  else
	    {
	      [NSApp removeWindowsItem: self];
	    }
	}
    }
}

- (id) validRequestorForSendType: (NSString*)sendType
		      returnType: (NSString*)returnType
{
  id result = nil;

  // FIXME: We should not forward this method if the delegate is a NSResponder
  if (_delegate && [_delegate respondsToSelector: _cmd])
    result = [_delegate validRequestorForSendType: sendType
				      returnType: returnType];

  if (result == nil)
    result = [NSApp validRequestorForSendType: sendType
				   returnType: returnType];
  return result;
}

/*
 * Saving and restoring the frame
 */
- (NSString*) frameAutosaveName
{
  return _autosaveName;
}

- (void) saveFrameUsingName: (NSString*)name
{
  NSUserDefaults	*defs;
  NSString		*key;
  id			obj;

  [windowsLock lock];
  defs = [NSUserDefaults standardUserDefaults];
  obj = [self stringWithSavedFrame];
  key = [NSString stringWithFormat: @"NSWindow Frame %@", name];
  [defs setObject: obj forKey: key];
  [windowsLock unlock];
}

- (BOOL) setFrameAutosaveName: (NSString*)name
{
  NSString	*nameToRemove = nil;

  if ([name isEqual: _autosaveName])
    {
      return YES;		/* That's our name already.	*/
    }

  [windowsLock lock];
  if ([autosaveNames member: name] != nil)
    {
      [windowsLock unlock];
      return NO;		/* Name in use elsewhere.	*/
    }
  if (_autosaveName != nil)
    {
      if (name == nil || [name isEqual: @""] == YES)
	{
	  nameToRemove = RETAIN(_autosaveName);
	}
      [autosaveNames removeObject: _autosaveName];
      _autosaveName = nil;
    }
  if (name != nil && [name isEqual: @""] == NO)
    {
      name = [name copy];
      [autosaveNames addObject: name];
      _autosaveName = name;
      RELEASE(name);
    }
  else if (nameToRemove != nil)
    {
      NSUserDefaults	*defs;
      NSString		*key;

      /*
       * Autosave name cleared - remove from defaults database.
       */
      defs = [NSUserDefaults standardUserDefaults];
      key = [NSString stringWithFormat: @"NSWindow Frame %@", nameToRemove];
      [defs removeObjectForKey: key];
      RELEASE(nameToRemove);
    }
  [windowsLock unlock];
  return YES;
}

- (void) setFrameFromString: (NSString*)string
{
  NSScanner	*scanner = [NSScanner scannerWithString: string];
  NSRect	nRect;
  NSRect	sRect;
  NSRect	fRect;
  int		value;

  /*
   * Scan in the window frame (flipped coordinate system).
   */
  if ([scanner scanInt: &value] == NO)
    {
      NSLog(@"Bad window frame format - x-coord missing");
      return;
    }
  fRect.origin.x = value;

  if ([scanner scanInt: &value] == NO)
    {
      NSLog(@"Bad window frame format - y-coord missing");
      return;
    }
  fRect.origin.y = value;

  if ([scanner scanInt: &value] == NO)
    {
      NSLog(@"Bad window frame format - width missing");
      return;
    }
  fRect.size.width = value;

  if ([scanner scanInt: &value] == NO)
    {
      NSLog(@"Bad window frame format - height missing");
      return;
    }
  fRect.size.height = value;

  /*
   * Scan in the frame for the area the window was placed in in screen.
   */
  if ([scanner scanInt: &value] == NO)
    {
      NSLog(@"Bad screen frame format - x-coord missing");
      return;
    }
  sRect.origin.x = value;

  if ([scanner scanInt: &value] == NO)
    {
      NSLog(@"Bad screen frame format - y-coord missing");
      return;
    }
  sRect.origin.y = value;

  if ([scanner scanInt: &value] == NO)
    {
      NSLog(@"Bad screen frame format - width missing");
      return;
    }
  sRect.size.width = value;

  if ([scanner scanInt: &value] == NO)
    {
      NSLog(@"Bad screen frame format - height missing");
      return;
    }
  sRect.size.height = value;

  /*
   * FIXME - the screen rectangle should give the area of the screen in which
   * the window could be placed (ie a rectangle excluding the dock), but
   * there is no API for that yet - so we just use the screen at present.
   */
  nRect = [[NSScreen mainScreen] frame];

  /*
   * FIXME - if the stored screen area is not the same as that currently
   * available, we should probably adjust the window frame (position) in
   * some way to try to amke layout sensible.
   */
  if (NSEqualRects(nRect, sRect) == NO)
    {
    }

  /*
   * Convert frame from flipped to normal coordinates.
   */
  fRect.origin.y -= fRect.size.height;

  /*
   * Check and set frame.
   */
  if (_maximumSize.width > 0 && fRect.size.width > _maximumSize.width)
    {
      fRect.size.width = _maximumSize.width;
    }
  if (_maximumSize.height > 0 && fRect.size.height > _maximumSize.height)
    {
      fRect.size.height = _maximumSize.height;
    }
  if (fRect.size.width < _minimumSize.width)
    {
      fRect.size.width = _minimumSize.width;
    }
  if (fRect.size.height < _minimumSize.height)
    {
      fRect.size.height = _minimumSize.height;
    }
  [self setFrame: fRect display: (_f.visible) ? YES : NO];
}

- (BOOL) setFrameUsingName: (NSString*)name
{
  NSUserDefaults	*defs;
  id			obj;
  NSString		*key;

  [windowsLock lock];
  defs = [NSUserDefaults standardUserDefaults];
  key = [NSString stringWithFormat: @"NSWindow Frame %@", name];
  obj = [defs objectForKey: key];
  [windowsLock unlock];
  if (obj == nil)
    return NO;
  [self setFrameFromString: obj];
  return YES;
}

- (NSString*) stringWithSavedFrame
{
  NSRect	fRect;
  NSRect	sRect;

  fRect = _frame;
  fRect.origin.y += fRect.size.height;	/* Make flipped	*/
  /*
   * FIXME - the screen rectangle should give the area of the screen in which
   * the window could be placed (ie a rectangle excluding the dock), but
   * there is no API for that yet - so we just use the screen at present.
   */
  sRect = [[NSScreen mainScreen] frame];

  return [NSString stringWithFormat: @"%d %d %d %d %d %d % d %d ",
    (int)fRect.origin.x, (int)fRect.origin.y,
    (int)fRect.size.width, (int)fRect.size.height,
    (int)sRect.origin.x, (int)sRect.origin.y,
    (int)sRect.size.width, (int)sRect.size.height];
}

/*
 * Printing and postscript
 */
- (NSData*) dataWithEPSInsideRect: (NSRect)rect
{
  return [_contentView dataWithEPSInsideRect: 
			   [_contentView convertRect: rect fromView: nil]];
}

- (void) fax: (id)sender
{
  [_contentView fax: sender];
}

- (void) print: (id)sender
{
  [_contentView print: sender];
}

/*
 * Zooming
 */

- (BOOL) isZoomed
{
  // FIXME: Method is missing  
  return NO;
}

- (void) performZoom: (id)sender
{
  // FIXME: We should check for the style and highlight the button
  [self zoom: sender];
}

- (void) zoom: (id)sender
{
  NSLog (@"[NSWindow zoom:] not implemented yet");
}


/*
 * Default botton
 */

- (NSButtonCell*) defaultButtonCell
{
  return _defaultButtonCell;
}

- (void) setDefaultButtonCell: (NSButtonCell*)aButtonCell
{
  ASSIGN(_defaultButtonCell, aButtonCell);
  _f.default_button_cell_key_disabled = NO;
}

- (void) disableKeyEquivalentForDefaultButtonCell
{
  _f.default_button_cell_key_disabled = YES;
}

- (void) enableKeyEquivalentForDefaultButtonCell
{
  _f.default_button_cell_key_disabled = NO;
}

/*
 * Assigning a delegate
 */
- (id) delegate
{
  return _delegate;
}

- (void) setDelegate: (id)anObject
{
  NSNotificationCenter	*nc = [NSNotificationCenter defaultCenter];

  if (_delegate)
    {
      [nc removeObserver: _delegate name: nil object: self];
    }
  _delegate = anObject;

#define SET_DELEGATE_NOTIFICATION(notif_name) \
  if ([_delegate respondsToSelector: @selector(window##notif_name:)]) \
    [nc addObserver: _delegate \
      selector: @selector(window##notif_name:) \
      name: NSWindow##notif_name##Notification object: self]

  SET_DELEGATE_NOTIFICATION(DidBecomeKey);
  SET_DELEGATE_NOTIFICATION(DidBecomeMain);
  SET_DELEGATE_NOTIFICATION(DidChangeScreen);
  SET_DELEGATE_NOTIFICATION(DidDeminiaturize);
  SET_DELEGATE_NOTIFICATION(DidExpose);
  SET_DELEGATE_NOTIFICATION(DidMiniaturize);
  SET_DELEGATE_NOTIFICATION(DidMove);
  SET_DELEGATE_NOTIFICATION(DidResignKey);
  SET_DELEGATE_NOTIFICATION(DidResignMain);
  SET_DELEGATE_NOTIFICATION(DidResize);
  SET_DELEGATE_NOTIFICATION(DidUpdate);
  SET_DELEGATE_NOTIFICATION(WillClose);
  SET_DELEGATE_NOTIFICATION(WillMiniaturize);
  SET_DELEGATE_NOTIFICATION(WillMove);
}

/*
 * NSCoding protocol
 */
- (void) encodeWithCoder: (NSCoder*)aCoder
{
  BOOL		flag;

  [super encodeWithCoder: aCoder];

  NSDebugLog(@"NSWindow: start encoding\n");

  [aCoder encodeRect: [[self contentView] frame]];
  [aCoder encodeValueOfObjCType: @encode(unsigned) at: &_styleMask];
  [aCoder encodeValueOfObjCType: @encode(NSBackingStoreType) at: &_backingType];

  [aCoder encodePoint: NSMakePoint(NSMinX([self frame]), NSMaxY([self frame]))];
  [aCoder encodeObject: _contentView];
  [aCoder encodeObject: _backgroundColor];
  [aCoder encodeObject: _representedFilename];
  [aCoder encodeObject: _miniaturizedTitle];
  [aCoder encodeObject: _windowTitle];

  [aCoder encodeSize: _minimumSize];
  [aCoder encodeSize: _maximumSize];

  [aCoder encodeValueOfObjCType: @encode(int) at: &_windowLevel];

  flag = _f.menu_exclude;
  [aCoder encodeValueOfObjCType: @encode(BOOL) at: &flag];
  flag = _f.is_one_shot;
  [aCoder encodeValueOfObjCType: @encode(BOOL) at: &flag];
  flag = _f.is_autodisplay;
  [aCoder encodeValueOfObjCType: @encode(BOOL) at: &flag];
  flag = _f.optimize_drawing;
  [aCoder encodeValueOfObjCType: @encode(BOOL) at: &flag];
  flag = _f.dynamic_depth_limit;
  [aCoder encodeValueOfObjCType: @encode(BOOL) at: &flag];
  flag = _f.cursor_rects_enabled;
  [aCoder encodeValueOfObjCType: @encode(BOOL) at: &flag];
  flag = _f.is_released_when_closed;
  [aCoder encodeValueOfObjCType: @encode(BOOL) at: &flag];
  flag = _f.hides_on_deactivate;
  [aCoder encodeValueOfObjCType: @encode(BOOL) at: &flag];
  flag = _f.accepts_mouse_moved;
  [aCoder encodeValueOfObjCType: @encode(BOOL) at: &flag];

  [aCoder encodeObject: _miniaturizedImage];
  [aCoder encodeConditionalObject: _initialFirstResponder];

  NSDebugLog(@"NSWindow: finish encoding\n");
}

- (id) initWithCoder: (NSCoder*)aDecoder
{
  id	oldself = self;
  BOOL	flag;

  if ((self = [super initWithCoder: aDecoder]) == oldself)
    {
      NSSize			aSize;
      NSRect			aRect;
      NSPoint			p;
      unsigned			aStyle;
      NSBackingStoreType	aBacking;
      int			anInt;
      id			obj;

      NSDebugLog(@"NSWindow: start decoding\n");
      aRect = [aDecoder decodeRect];
      [aDecoder decodeValueOfObjCType: @encode(unsigned)
				   at: &aStyle];
      [aDecoder decodeValueOfObjCType: @encode(NSBackingStoreType)
				   at: &aBacking];

      self = [self initWithContentRect: aRect
			     styleMask: aStyle
			       backing: aBacking
				 defer: NO
				screen: nil];

      p = [aDecoder decodePoint];
      obj = [aDecoder decodeObject];
      [self setContentView: obj];
      obj = [aDecoder decodeObject];
      [self setBackgroundColor: obj];
      obj = [aDecoder decodeObject];
      [self setRepresentedFilename: obj];
      obj = [aDecoder decodeObject];
      [self setMiniwindowTitle: obj];
      obj = [aDecoder decodeObject];
      [self setTitle: obj];

      aSize = [aDecoder decodeSize];
      [self setMinSize: aSize];
      aSize = [aDecoder decodeSize];
      [self setMaxSize: aSize];

      [aDecoder decodeValueOfObjCType: @encode(int)
				   at: &anInt];
      [self setLevel: anInt];

      [aDecoder decodeValueOfObjCType: @encode(BOOL) at: &flag];
      [self setExcludedFromWindowsMenu: flag];
      [aDecoder decodeValueOfObjCType: @encode(BOOL) at: &flag];
      [self setOneShot: flag];
      [aDecoder decodeValueOfObjCType: @encode(BOOL) at: &flag];
      [self setAutodisplay: flag];
      [aDecoder decodeValueOfObjCType: @encode(BOOL) at: &flag];
      [self useOptimizedDrawing: flag];
      [aDecoder decodeValueOfObjCType: @encode(BOOL) at: &flag];
      [self setDynamicDepthLimit: flag];
      [aDecoder decodeValueOfObjCType: @encode(BOOL) at: &flag];
      if (flag)
	[self enableCursorRects];
      else
	[self disableCursorRects];
      [aDecoder decodeValueOfObjCType: @encode(BOOL) at: &flag];
      [self setReleasedWhenClosed: flag];
      [aDecoder decodeValueOfObjCType: @encode(BOOL) at: &flag];
      [self setHidesOnDeactivate: flag];
      [aDecoder decodeValueOfObjCType: @encode(BOOL) at: &flag];
      [self setAcceptsMouseMovedEvents: flag];

      [aDecoder decodeValueOfObjCType: @encode(id)
				   at: &_miniaturizedImage];
      [aDecoder decodeValueOfObjCType: @encode(id)
				   at: &_initialFirstResponder];

      [self setFrameTopLeftPoint: p];
      NSDebugLog(@"NSWindow: finish decoding\n");
    }

  return self;
}

- (NSInterfaceStyle) interfaceStyle
{
  return [super interfaceStyle];
}

- (void) setInterfaceStyle: (NSInterfaceStyle)aStyle
{
  [super setInterfaceStyle: aStyle];
}

- (void*) windowHandle
{
  // FIXME: Should only be defined on MS Windows
  return (void*) 0;
}

@end

/*
 * GNUstep backend methods
 */
@implementation NSWindow (GNUstepBackend)

/*
 * Mouse capture/release
 */
- (void) _captureMouse: sender
{
  DPScapturemouse(GSCurrentContext(), _windowNum);
}

- (void) _releaseMouse: sender
{
  DPSreleasemouse(GSCurrentContext());
}

- (void) setContentViewSize: (NSSize)aSize
{
  NSRect r;

  r.origin = NSZeroPoint;
  r.size = aSize;
  if (_contentView)
    [_contentView setFrame: r];
}

- (void) _setVisible: (BOOL)flag
{
  _f.visible = flag;
}

- (void) performDeminiaturize: sender
{
  [self deminiaturize: sender];
}

- (void) performHide: sender
{
  // FIXME: Implementation is missing
}

- (void) performUnhide: sender
{
  // FIXME: Implementation is missing
}

/*
 * Allow subclasses to init without the backend
 * class attempting to create an actual window
 */
- (void) _initDefaults
{
  _firstResponder = self;
  _originalResponder = nil;
  _initialFirstResponder = nil;
  _selectionDirection = NSDirectSelection;
  _delegate = nil;
  _windowNum = 0;
  _gstate = 0;
  _backgroundColor = RETAIN([NSColor controlColor]);
  _representedFilename = @"Window";
  _miniaturizedTitle = @"Window";
  _miniaturizedImage = nil;
  _windowTitle = @"Window";
  _lastPoint = NSZeroPoint;
  _windowLevel = NSNormalWindowLevel;

  _depthLimit = 8;
  _disableFlushWindow = 0;

  _f.is_one_shot = NO;
  _f.is_autodisplay = YES;
  _f.optimize_drawing = YES;
  _f.dynamic_depth_limit = YES;
  _f.cursor_rects_enabled = NO;
  _f.visible = NO;
  _f.is_key = NO;
  _f.is_main = NO;
  _f.is_edited = NO;
  _f.is_released_when_closed = YES;
  _f.is_miniaturized = NO;
  _f.menu_exclude = NO;
  _f.hides_on_deactivate = NO;
  _f.accepts_mouse_moved = NO;
  _f.has_opened = NO;
  _f.has_closed = NO;
  
  _rFlags.needs_display = YES;
}

@end

BOOL GSViewAcceptsDrag(NSView *v, id<NSDraggingInfo> dragInfo)
{
  NSPasteboard *pb = [dragInfo draggingPasteboard];
  if ([pb availableTypeFromArray: GSGetDragTypes(v)])
    return YES;
  return NO;
}

void NSCountWindows(int *count)
{
  *count = (int)NSCountMapTable(windowmaps);
}

void NSWindowList(int size, int list[])
{
  NSMapEnumerator	me = NSEnumerateMapTable(windowmaps);
  int			num;
  id			win;
  int			i = 0;

  while (i < size && NSNextMapEnumeratorPair(&me, (void*)&num, (void*)&win))
    {
      list[i++] = num;
    }
/* FIXME - the list produced should be in window stacking order */
}

NSArray* GSAllWindows()
{
  return NSAllMapTableValues(windowmaps);
}

NSWindow* GSWindowWithNumber(int num)
{
  return (NSWindow*)NSMapGet(windowmaps, (void*)num);
}