mirror of
https://github.com/Instagram/IGListKit
synced 2026-04-21 21:47:34 +00:00
f92b9339ee
Summary: The standardized Meta copyright notice is "Copyright (c) Meta Platforms, Inc. and affiliates." and not "Copyright (c) Meta Platforms, Inc. and its affiliates." (Dropping the "its") This diff updates the copyright notice in each source file to the correct this. Reviewed By: willbailey Differential Revision: D44737667 fbshipit-source-id: 643bf36df76723e70d9d826c53cf8f29b8a0c8cc
93 lines
3.5 KiB
Objective-C
93 lines
3.5 KiB
Objective-C
/*
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* Copyright (c) Meta Platforms, Inc. and affiliates.
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*
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* This source code is licensed under the MIT license found in the
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* LICENSE file in the root directory of this source tree.
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*/
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#import "IGListIndexSetResult.h"
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#import "IGListIndexSetResultInternal.h"
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@implementation IGListIndexSetResult {
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NSMapTable<id<NSObject>, NSNumber *> *_oldIndexMap;
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NSMapTable<id<NSObject>, NSNumber *> *_newIndexMap;
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}
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- (instancetype)initWithInserts:(NSIndexSet *)inserts
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deletes:(NSIndexSet *)deletes
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updates:(NSIndexSet *)updates
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moves:(NSArray<IGListMoveIndex *> *)moves
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oldIndexMap:(NSMapTable<id<NSObject>, NSNumber *> *)oldIndexMap
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newIndexMap:(NSMapTable<id<NSObject>, NSNumber *> *)newIndexMap {
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if (self = [super init]) {
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_inserts = inserts;
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_deletes = deletes;
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_updates = updates;
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_moves = moves;
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_oldIndexMap = oldIndexMap;
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_newIndexMap = newIndexMap;
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}
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return self;
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}
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- (BOOL)hasChanges {
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return self.changeCount > 0;
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}
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- (NSInteger)changeCount {
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return self.inserts.count + self.deletes.count + self.updates.count + self.moves.count;
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}
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- (IGListIndexSetResult *)resultForBatchUpdates {
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NSMutableIndexSet *deletes = [self.deletes mutableCopy];
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NSMutableIndexSet *inserts = [self.inserts mutableCopy];
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NSMutableIndexSet *filteredUpdates = [self.updates mutableCopy];
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NSArray<IGListMoveIndex *> *moves = self.moves;
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NSMutableArray<IGListMoveIndex *> *filteredMoves = [moves mutableCopy];
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// convert all update+move to delete+insert
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const NSInteger moveCount = moves.count;
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for (NSInteger i = moveCount - 1; i >= 0; i--) {
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IGListMoveIndex *move = moves[i];
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if ([filteredUpdates containsIndex:move.from]) {
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[filteredMoves removeObjectAtIndex:i];
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[filteredUpdates removeIndex:move.from];
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[deletes addIndex:move.from];
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[inserts addIndex:move.to];
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}
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}
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// iterate all new identifiers. if its index is updated, delete from the old index and insert the new index
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for (id<NSObject> key in [_oldIndexMap keyEnumerator]) {
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const NSInteger index = [[_oldIndexMap objectForKey:key] integerValue];
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if ([filteredUpdates containsIndex:index]) {
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[deletes addIndex:index];
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[inserts addIndex:[[_newIndexMap objectForKey:key] integerValue]];
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}
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}
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return [[IGListIndexSetResult alloc] initWithInserts:inserts
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deletes:deletes
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updates:[NSIndexSet new]
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moves:filteredMoves
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oldIndexMap:_oldIndexMap
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newIndexMap:_newIndexMap];
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}
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- (NSInteger)oldIndexForIdentifier:(id<NSObject>)identifier {
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NSNumber *index = [_oldIndexMap objectForKey:identifier];
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return index == nil ? NSNotFound : [index integerValue];
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}
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- (NSInteger)newIndexForIdentifier:(id<NSObject>)identifier {
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NSNumber *index = [_newIndexMap objectForKey:identifier];
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return index == nil ? NSNotFound : [index integerValue];
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}
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- (NSString *)description {
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return [NSString stringWithFormat:@"<%@ %p; %lu inserts; %lu deletes; %lu updates; %lu moves>",
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NSStringFromClass(self.class), self, (unsigned long)self.inserts.count, (unsigned long)self.deletes.count, (unsigned long)self.updates.count, (unsigned long)self.moves.count];
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}
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@end
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