IGListKit/Source/IGListDiffKit/IGListMoveIndexPath.m
Nate Stedman e4c60650f2 Split IGListKit and IGListDiffKit (#1377)
Summary:
Pull Request resolved: https://github.com/Instagram/IGListKit/pull/1377

This splits the diffing-only components from `IGListKit` out into a separate library, `IGListDiffKit`, allowing them to be used independently of the rest of `IGListKit`. We've found that the diffing components of the library are useful independently of the rest of the `UICollectionView` infrastructure, and separating the libraries allows apps to take advantage of those components without paying the full binary size cost of `IGListKit`. The diffing components are available as a subspec in Cocoapods, and as an independent framework in Carthage and direct Xcode project import (i.e. Git submodules).

This is a breaking change, necessitating a major version bump, although it should have only minor impact for projects using the umbrella header `IGListKit.h`, as that header continues to import the diffing utilities. In particular, for a project using Cocoapods and importing `IGListKit.h`, there should be no code changes required.

Reviewed By: calimarkus

Differential Revision: D18114249

fbshipit-source-id: 363b5a427e32800bbc6e82f897230963b4167245
2019-10-31 08:26:12 -07:00

46 lines
1.1 KiB
Objective-C

/**
* Copyright (c) Facebook, Inc. and its affiliates.
*
* This source code is licensed under the MIT license found in the
* LICENSE file in the root directory of this source tree.
*/
#import "IGListMoveIndexPath.h"
@implementation IGListMoveIndexPath
- (instancetype)initWithFrom:(NSIndexPath *)from to:(NSIndexPath *)to {
NSParameterAssert(from != nil);
NSParameterAssert(to != nil);
if (self = [super init]) {
_from = from;
_to = to;
}
return self;
}
- (NSUInteger)hash {
return [_from hash] ^ [_to hash];
}
- (BOOL)isEqual:(id)object {
if (object == self) {
return YES;
}
if ([object isKindOfClass:[IGListMoveIndexPath class]]) {
NSIndexPath *f1 = self.from, *f2 = [object from];
NSIndexPath *t1 = self.to, *t2 = [object to];
return [f1 isEqual:f2] && [t1 isEqual:t2];
}
return NO;
}
- (NSComparisonResult)compare:(id)object {
return [[self from] compare:[object from]];
}
- (NSString *)description {
return [NSString stringWithFormat:@"<%@ %p; from: %@; to: %@;>", NSStringFromClass(self.class), self, self.from, self.to];
}
@end