/** <title>NSWindowController</title>

Copyright (C) 2000 Free Software Foundation, Inc.

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; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111 USA.
*/

#import <Foundation/Foundation.h>

#import <AppKit/NSWindowController.h>
#import <AppKit/NSWindow.h>
#import <AppKit/NSPanel.h>
#import <AppKit/NSNibLoading.h>
#import <AppKit/NSDocument.h>

#import "NSAppKitPrivate.h"

@implementation NSWindowController

- (id) initWithWindowNibName: (NSString *)windowNibName
{
	return [self initWithWindowNibName: windowNibName  owner: self];
}

- (id) initWithWindowNibName: (NSString *)windowNibName  owner: (id)owner
{
	if (windowNibName == nil)
		{
		[NSException raise: NSInvalidArgumentException
					format: @"attempt to init NSWindowController with nil windowNibName"];
		}
	
	if (owner == nil)
		{
		[NSException raise: NSInvalidArgumentException
					format: @"attempt to init NSWindowController with nil owner"];
		}
	
	if((self = [self initWithWindow: nil]))
		{
		ASSIGN(_windowNibName, windowNibName);
		_owner = owner;
#if 0
			NSLog(@"initialized %@ owner=%@", self, owner);
#endif
		}
	return self;
}

- (id) initWithWindowNibPath: (NSString *)windowNibPath
					   owner: (id)owner
{
	if (windowNibPath == nil)
		{
		[NSException raise: NSInvalidArgumentException
					format: @"attempt to init NSWindowController with nil windowNibPath"];
		}
	
	if (owner == nil)
		{
		[NSException raise: NSInvalidArgumentException
					format: @"attempt to init NSWindowController with nil owner"];
		}
	
	if((self = [self initWithWindow: nil]))
		{
		ASSIGN(_windowNibPath, windowNibPath);
		_owner = owner;
#if 0
			NSLog(@"initialized %@ owner=%@", self, owner);
#endif
		}
	return self;
}

- (id) initWithWindow: (NSWindow *)window
{
	if((self = [super init]))
		{
		
		_windowFrameAutosaveName = @"";
		_wcFlags.shouldCascade = YES;
		_wcFlags.shouldCloseDocument = NO;

		if(window)
			{
			_window=[window retain];
			[self _windowDidLoad];
			}
		
		[self setDocument: nil];
		}
	return self;
}

- (id) init
{
	return [self initWithWindow: nil];
}

- (void) dealloc
{
	[[NSNotificationCenter defaultCenter] removeObserver: self];
	[_windowNibName release];
	[_windowNibPath release];
	[_windowFrameAutosaveName release];
	[_topLevelObjects release];
	[_window release];
	[super dealloc];
}

- (NSString *) description
{
	return [NSString stringWithFormat:@"%@ name=%@ path=%@", [super description], [self windowNibName], [self windowNibPath]];
}

- (NSString *) windowNibName
{
	if ((_windowNibName == nil) && (_windowNibPath != nil))
		{
		return [[_windowNibPath lastPathComponent] stringByDeletingPathExtension];
		}
	
	return _windowNibName;
}

- (NSString *)windowNibPath
{
	if ((_windowNibName != nil) && (_windowNibPath == nil))
		{
		NSString *path=nil;
		
			// This is not fully correct as nib resources are searched different.
			// How? What must be changed?
#if 0
			NSLog(@"owner bundle %@", [NSBundle bundleForClass: [_owner class]]);
			NSLog(@"main bundle %@", [NSBundle mainBundle]);
#endif
		if(_owner)
			path = [[NSBundle bundleForClass: [_owner class]] pathForResource: _windowNibName ofType:@"nib"];
		if(path == nil)
			path = [[NSBundle mainBundle] pathForResource: _windowNibName ofType:@"nib"];
			
		return path;
		}
	
	return _windowNibPath;
}

- (id) owner
{
	return _owner;
}

- (void) setDocument: (NSDocument *)document
{
#if 0
	NSLog(@"%@ setDocument:%@", self, document);
#endif
	// FIXME - this is RETAINed and never RELEASEd ...
	ASSIGN (_document, document);
	[self synchronizeWindowTitleWithDocumentName];
	
	if (_document == nil)
		{
		/* If you want the window to be deallocated when closed, you
		need to observe the NSWindowWillCloseNotification (or
														   implement the window's delegate windowWillClose: method) and
		autorelease the window controller in that method.  That will
		then release the window when the window controller is
		released. */
		[_window setReleasedWhenClosed: NO];
		}
}

- (id) document
{
	return _document;
}

- (void) setDocumentEdited: (BOOL)flag
{
	[_window setDocumentEdited: flag];
}

- (void) setWindowFrameAutosaveName:(NSString *)name
{
	ASSIGN(_windowFrameAutosaveName, name);
	
	if ([self isWindowLoaded])
		{
		[[self window] setFrameAutosaveName: name ? name : @""];
		}
}

- (NSString *) windowFrameAutosaveName
{
	return _windowFrameAutosaveName;
}

- (void) setShouldCloseDocument: (BOOL)flag
{
	_wcFlags.shouldCloseDocument = flag;
}

- (BOOL) shouldCloseDocument
{
	return _wcFlags.shouldCloseDocument;
}

- (void) setShouldCascadeWindows: (BOOL)flag
{
	_wcFlags.shouldCascade = flag;
}

- (BOOL) shouldCascadeWindows
{
	return _wcFlags.shouldCascade;
}

- (void) close
{
	[_window close];
}

- (void) _windowWillClose: (NSNotification *)notification
{
	if ([notification object] == _window)
		{
		/* We only need to do something if the window is set to be
		released when closed (which should only happen if _document
							  != nil).  In this case, we release everything; otherwise,
		well the window is closed but nothing is released so there's
		nothing to do here. */
		if ([_window isReleasedWhenClosed])
			{
			if ([_window delegate] == self) 
				{
				[_window setDelegate: nil];
				}
			if ([_window windowController] == self) 
				{
					NSResponder *responder = _window;
					while (responder && [responder nextResponder] != self)
							responder = [responder nextResponder];
					[responder setNextResponder: [self nextResponder]];
					[_window setWindowController: nil];
				}
			
			/*
			 * If the window is set to isReleasedWhenClosed, it will release
			 * itself, so nil out our reference so we don't release it again
			 * 
			 * Apple's implementation doesn't seem to deal with this case, and
			 * crashes if isReleaseWhenClosed is set.
			 */
			_window = nil;
			
			[_document _removeWindowController: self];
			}
		}
}

- (NSWindow *) window
{
	if (_window == nil && ![self isWindowLoaded])
		{
		// Do all the notifications.  Yes, the docs say this should
		// be implemented here instead of in -loadWindow itself.
		[self windowWillLoad];
		if ([_document respondsToSelector:@selector(windowControllerWillLoadNib:)])
			{
			[_document windowControllerWillLoadNib:self];
			}
		
		[self loadWindow];
		
		[self _windowDidLoad];
		if ([_document respondsToSelector:@selector(windowControllerDidLoadNib:)])
			{
			[_document windowControllerDidLoadNib:self];
			}
		}
	
	return _window;
}

- (void) setWindow:(NSWindow *)aWindow
{
	ASSIGN(_window, aWindow);
	if(_document == nil)
		[_window setReleasedWhenClosed: NO];
}

- (IBAction) showWindow: (id)sender
{
	NSWindow *window = [self window];	// load if not yet...
#if 0
	NSLog(@"showWindow %@ - %@", self, window);
#endif
	if([window isKindOfClass: [NSPanel class]] 
		&& [(NSPanel*)window becomesKeyOnlyIfNeeded])
		{
		[window orderFront: sender];
		}
	else
		{
		[window makeKeyAndOrderFront: sender];
		}
}

- (NSString *) windowTitleForDocumentDisplayName: (NSString *)displayName
{
	return displayName;
}

- (void) synchronizeWindowTitleWithDocumentName
{
	if (_document != nil)
		{
		NSString *filename = [_document fileName];
		NSString *title = [self windowTitleForDocumentDisplayName: [_document displayName]];
		
		[_window setTitleWithRepresentedFilename: filename];	// set representedFilename and icon
		[_window setTitle: title];	// may override filename
		}
}

- (BOOL) isWindowLoaded
{
	return _wcFlags.nibIsLoaded;
}

- (void) windowDidLoad
{
	return;
}

- (void) windowWillLoad
{
	return;
}

- (void) _windowDidLoad
{
	_wcFlags.nibIsLoaded = YES;
	
	[_window setWindowController: self];
	
	[self setNextResponder: [_window nextResponder]];	// add to responder chain
	[_window setNextResponder: self];
	
	[self synchronizeWindowTitleWithDocumentName];
	
	[[NSNotificationCenter defaultCenter]
                addObserver: self
				   selector: @selector(_windowWillClose:)
					   name: NSWindowWillCloseNotification
					 object: _window];
	
	/* Make sure window sizes itself right */
	if ([_windowFrameAutosaveName length] > 0)
		{
		[_window setFrameUsingName: _windowFrameAutosaveName];
		[_window setFrameAutosaveName: _windowFrameAutosaveName];
		}
	
	if ([self shouldCascadeWindows])
		{
		static NSPoint nextWindowLocation  = { 0.0, 0.0 };
		static BOOL firstWindow = YES;
		
		if (firstWindow)
			{
			NSRect windowFrame = [_window frame];
			
			/* Start with the frame as set */
			nextWindowLocation = NSMakePoint (NSMinX (windowFrame), 
											  NSMaxY (windowFrame));
			firstWindow = NO;
			}
		else
			{
			/*
			 * cascadeTopLeftFromPoint will "wrap" the point back to the
			 * top left if the normal cascading will cause the window to go
			 * off the screen. In Apple's implementation, this wraps to the
			 * extreme top of the screen, and offset only a small amount
			 * from the left.
			 */
			nextWindowLocation 
			= [_window cascadeTopLeftFromPoint: nextWindowLocation];
			}
		}
	
	[self windowDidLoad];
}

- (void) loadWindow
{
#if 0
	NSLog(@"loadWindow %@", self);
#endif
	if ([self isWindowLoaded]) 
		return;
	
	if ((_windowNibName == nil) && (_windowNibPath != nil))
		{
		NSDictionary *table = [NSDictionary dictionaryWithObject:_owner forKey:NSNibOwner];
		if ([NSBundle loadNibFile:_windowNibPath
				externalNameTable:table
						 withZone:[_owner zone]])
			{
			_wcFlags.nibIsLoaded = YES;
			if (_window == nil && _document != nil && _owner == _document)
				{
				[self setWindow:[_document _window]];
				[_document setWindow:nil];
				}
			return;
			}
		}
	
	if ([NSBundle loadNibNamed:_windowNibName owner:_owner])
		{
		_wcFlags.nibIsLoaded = YES;
		if (_window == nil && _document != nil && _owner == _document)
			{
			[self setWindow:[_document _window]];
			[_document setWindow:nil];
			}
		}
	else
		{
		// FIXME: We should still try the main bundle
		NSLog (@"%@: could not load nib named %@.nib", self, _windowNibName);
		}
}

- (id) initWithCoder:(NSCoder *)aDecoder
{
	NIMP;
	return [self init];
}

- (void) encodeWithCoder: (NSCoder *)coder
{
	// What are we supposed to encode?  Window nib name?  Or should these
	// be empty, just to conform to NSCoding, so we do an -init on
	// unarchival.  ?
}

@end