/*
	File:		OpenURLPanel.m
					 
	Originally introduced at WWDC 2004 at
			  Session 214, "Programming QuickTime with Cocoa." 
			  Sample code is explained in detail in 
			  "QTKit Programming Guide" documentation.


	Copyright:	 © Copyright 2004, 2005 Apple Computer, Inc.
				 All rights reserved.

	Disclaimer: IMPORTANT:	This Apple software is supplied to you by
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	following terms, and your use, installation, modification or
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	terms.	If you do not agree with these terms, please do not use,
	install, modify or redistribute this Apple software.

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	subject to these terms, Apple grants you a personal, non-exclusive
	license, under AppleÕs copyrights in this original Apple software (the
	"Apple Software"), to use, reproduce, modify and redistribute the Apple
	Software, with or without modifications, in source and/or binary forms;
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	without modifications, you must retain this notice and the following
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	Neither the name, trademarks, service marks or logos of Apple Computer,
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	as expressly stated in this notice, no other rights or licenses, express
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	The Apple Software is provided by Apple on an "AS IS" basis.  APPLE
	MAKES NO WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION
	THE IMPLIED WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY AND FITNESS
	FOR A PARTICULAR PURPOSE, REGARDING THE APPLE SOFTWARE OR ITS USE AND
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*/


#import "OpenURLPanel.h"

// user defaults keys
#define kUserDefaultURLsKey @"UserDefaultURLsKey"

// maximum urls
#define kMaximumURLs		15

@implementation OpenURLPanel

static OpenURLPanel *openURLPanel = nil;

// class methods
+ (id)openURLPanel
{
	if (openURLPanel == nil)
		openURLPanel = [[self alloc] init];

	return openURLPanel;
}

- (id)init
{
    if ((self = [super init]))
    {
        // init
        [self setURLArray:[NSMutableArray arrayWithCapacity:10]];

        // listen for app termination notifications
        [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(writeURLs:) name:NSApplicationWillTerminateNotification object:NSApp];
    }

	return self;
}

- (void)dealloc
{
	[[NSNotificationCenter defaultCenter] removeObserver:self];
	[self setURLArray:nil];
}

// getters
- (NSString *)urlString
{
	NSString *urlString = nil;

	// get the url
	urlString = [mUrlComboBox stringValue];

	if (urlString == nil)
		urlString = [mUrlComboBox objectValueOfSelectedItem];

	if ([urlString length] == 0)
		urlString = nil;

	return urlString;
}

- (NSURL *)url
{
	NSURL		*url = nil;
	NSString	*urlString;

	// get the url
	urlString = [self urlString];

	if (urlString)
		url = [NSURL URLWithString:urlString];

	return url;
}

// setters
- (void)setURLArray:(NSMutableArray *)urlLArray
{
	mUrlArray = urlLArray;
}

// delegates
- (void)awakeFromNib
{
	NSArray *urls;

	// restore the previous urls
	urls = [[NSUserDefaults standardUserDefaults] objectForKey:kUserDefaultURLsKey];
	[mUrlArray addObjectsFromArray:urls];

	if (urls)
		[mUrlComboBox addItemsWithObjectValues:urls];
}

// notifications
- (void)writeURLs:(NSNotification *)notification
{
	NSUserDefaults *userDefaults;

	if ([mUrlArray count])
	{
		// init
		userDefaults = [NSUserDefaults standardUserDefaults];
	
		// write out the urls
		[userDefaults setObject:mUrlArray forKey:kUserDefaultURLsKey];
		[userDefaults synchronize];
	}
}

// actions
typedef id (*myIMP)(id, SEL, ...);

- (IBAction)doOpenURL:(id)sender
{
	NSString	*urlString;
	NSURL		*url;
	BOOL		informDelegate = YES;
	myIMP		callback;

	if ([sender tag] == NSOKButton)
	{
		// validate the URL
		url = [self url];
		urlString = [self urlString];

		if (url)
		{
			// save the url
			if (![mUrlArray containsObject:urlString])
			{
				// save the url
				[mUrlArray addObject:urlString];

				// add the url to the combo box
				[mUrlComboBox addItemWithObjectValue:urlString];

				// remove the oldest url if the maximum has been exceeded
				if ([mUrlArray count] > kMaximumURLs)
				{
					[mUrlArray removeObjectAtIndex:0];
					[mUrlComboBox removeItemAtIndex:0];
				}
			}
			else
			{
				// move the url to the bottom of the list
				[mUrlArray removeObject:urlString];
				[mUrlArray addObject:urlString];
				[mUrlComboBox removeItemWithObjectValue:urlString];
				[mUrlComboBox addItemWithObjectValue:urlString];
			}
		}
		else
		{
			if (mIsSheet)
				NSRunAlertPanel(NSLocalizedString(@"InvalidURLShort", @""), NSLocalizedString(@"InvalidURLLong", @""), nil, nil, nil);
			else
				NSBeginAlertSheet(NSLocalizedString(@"InvalidURLShort", @""), nil, nil, nil, mPanel, nil, nil, nil, nil, NSLocalizedString(@"InvalidURLLong", @""));

			informDelegate = NO;
		}
	}

	// inform the delegate
	if (informDelegate && mDelegate && mDidEndSelector)
	{
		callback = (myIMP) [mDelegate methodForSelector:mDidEndSelector];
		callback(mDelegate, mDidEndSelector, self, [sender tag], mContextInfo);
		
		[self close];
	}
}

// methods
- (void)beginSheetWithWindow:(NSWindow *)window delegate:(id)delegate didEndSelector:(SEL)didEndSelector contextInfo:(void *)contextInfo
{
	// will this run as a sheet
	mIsSheet = (window ? YES : NO);

	// save the delegate, did end selector, and context info
	mDelegate = delegate;
	mDidEndSelector = (didEndSelector);
	mContextInfo = contextInfo;
    
    NSArray *objects;

	// load the bundle (if necessary)
	if (mPanel == nil)
        [[NSBundle mainBundle] loadNibNamed:@"OpenURLPanel" owner:self topLevelObjects:&objects];

	// start the sheet (or window)
	[NSApp beginSheet:mPanel modalForWindow:window modalDelegate:nil didEndSelector:nil contextInfo:nil];
}

- (void)close
{
	// close it down
	[NSApp endSheet:mPanel];
	[mPanel close];
}

@end