mikeabdullah’s gists

mikeabdullah / KSIsNotNSNotFound.h

Created January 17, 2011 14:31

Simple value transfer like `NSIsNotNil`, but for NSNotFound

	//
	// KSIsNotNSNotFound.h
	// Sandvox
	//
	// Created by Mike on 16/01/2011.
	// Copyright 2011 Karelia Software. All rights reserved.
	//

	#import <Cocoa/Cocoa.h>

mikeabdullah / gist:866873

Created March 12, 2011 00:47

How to make a managed object complain if it's being turned into a fault while KVO observers are still registered with it.

	- (void)willTurnIntoFault;
	{
	[super willTurnIntoFault];

	if ([self observationInfo])
	{
	NSLog(@"%@ has observers:\n%@", [self objectID], [self observationInfo]);
	}
	}

mikeabdullah / gist:866907

Created March 12, 2011 01:21

How to fix node insertion in NSTreeController on Leopard

	#if MAC_OS_X_VERSION_MIN_REQUIRED <= MAC_OS_X_VERSION_10_5

	- (void)didInsertNode:(NSTreeNode *)node;
	{
	// See if model matches tree state. Leopard gets them out of sync, adding to the model rather than inserting
	id object = [node representedObject];
	NSIndexPath *indexPath = [node indexPath];
	NSUInteger index = [indexPath lastIndex];

	NSTreeNode *parent = [node parentNode];

mikeabdullah / gist:867275

Created March 12, 2011 14:35

Log errors to the console before they're presented

	- (NSError )application:(NSApplication )theApplication
	willPresentError:(NSError *)error
	{
	// Log the error to the console for debugging
	NSLog(@"Application will present error:\n%@", [error description]);

	return error;
	}

mikeabdullah / gist:867278

Created March 12, 2011 14:37

More informative debugging description for NSError

	- (NSString *)debugDescription;
	{
	// Log the entirety of domain, code, userInfo for debugging.
	// Operates recursively on underlying errors

	NSMutableDictionary *dictionaryRep = [[self userInfo] mutableCopy];

	[dictionaryRep setObject:[self domain]
	forKey:@"domain"];
	[dictionaryRep setObject:[NSNumber numberWithInteger:[self code]]

mikeabdullah / gist:867284

Created March 12, 2011 14:41

Apple's recommended way to disable undo registration for NSManagedObjectContext

	[[self managedObjectContext] processPendingChanges];
	[[[self managedObjectContext] undoManager] disableUndoRegistration];
	// Make your special changes to the managed object
	[[self managedObjectContext] processPendingChanges];
	[[[self managedObjectContext] undoManager] enableUndoRegistration];

mikeabdullah / gist:867285

Created March 12, 2011 14:44

More general way to disable undo registration, which happens to be compatible with NSManagedObjectContext

	[[NSNotificationCenter defaultCenter]
	postNotificationName:NSUndoManagerCheckpointNotification
	object:undoManager];
	[undoManager disableUndoRegistration];
	// Make your special changes to the managed object
	[[NSNotificationCenter defaultCenter]
	postNotificationName:NSUndoManagerCheckpointNotification
	object:undoManager];
	[undoManager enableUndoRegistration];

mikeabdullah / gist:868549

Created March 13, 2011 23:27

Customising object removal from NSArrayController

	- (void)willRemoveObject:(id)object;
	{
	// Put your removal handling code here
	}

	- (void)removeObjects:(NSArray *)objects
	{
	// -removeObject: calls this method internally.
	// Iterate the objects, reporting each one

mikeabdullah / gist:878354

Created March 20, 2011 14:37

Testing if an NSTreeNode is a descendant of another

	- (BOOL)ks_isDescendantOfNode:(NSTreeNode *)aNode;
	{
	NSTreeNode *testNode = self;
	while (testNode)
	{
	if (testNode == aNode) return YES;
	testNode = [testNode parentNode];
	}

	return NO;

mikeabdullah / gist:905412

Created April 6, 2011 09:54

How to fake removing a recent document URL. Note, uses -ks_isEqualToURL: method from KSFileUtilities

	- (void)clearRecentDocumentURL:(NSURL *)url;
	{
	NSArray *recentDocs = [self recentDocumentURLs];
	[self clearRecentDocuments:self];

	// Must enumerate backwards to register in the correct order
	for (NSURL *aURL in [recentDocs reverseObjectEnumerator])
	{
	if (![aURL ks_isEqualToURL:url])
	{

Mike Abdullah mikeabdullah