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
91 lines
3.7 KiB
Objective-C
91 lines
3.7 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 "IGListIndexPathResult.h"
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#import "IGListIndexPathResultInternal.h"
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@implementation IGListIndexPathResult {
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NSMapTable<id<NSObject>, NSIndexPath *> *_oldIndexPathMap;
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NSMapTable<id<NSObject>, NSIndexPath *> *_newIndexPathMap;
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}
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- (instancetype)initWithInserts:(NSArray<NSIndexPath *> *)inserts
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deletes:(NSArray<NSIndexPath *> *)deletes
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updates:(NSArray<NSIndexPath *> *)updates
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moves:(NSArray<IGListMoveIndexPath *> *)moves
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oldIndexPathMap:(NSMapTable<id<NSObject>, NSIndexPath *> *)oldIndexPathMap
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newIndexPathMap:(NSMapTable<id<NSObject>, NSIndexPath *> *)newIndexPathMap {
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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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_oldIndexPathMap = oldIndexPathMap;
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_newIndexPathMap = newIndexPathMap;
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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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- (IGListIndexPathResult *)resultForBatchUpdates {
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NSMutableSet<NSIndexPath *> *deletes = [NSMutableSet setWithArray:self.deletes];
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NSMutableSet<NSIndexPath *> *inserts = [NSMutableSet setWithArray:self.inserts];
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NSMutableSet<NSIndexPath *> *filteredUpdates = [NSMutableSet setWithArray:self.updates];
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NSArray<IGListMoveIndexPath *> *moves = self.moves;
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NSMutableArray<IGListMoveIndexPath *> *filteredMoves = [moves mutableCopy];
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// convert move+update to delete+insert, respecting the from/to of the move
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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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IGListMoveIndexPath *move = moves[i];
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if ([filteredUpdates containsObject:move.from]) {
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[filteredMoves removeObjectAtIndex:i];
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[filteredUpdates removeObject:move.from];
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[deletes addObject:move.from];
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[inserts addObject: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 [_oldIndexPathMap keyEnumerator]) {
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NSIndexPath *indexPath = [_oldIndexPathMap objectForKey:key];
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if ([filteredUpdates containsObject:indexPath]) {
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[deletes addObject:indexPath];
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[inserts addObject:(id)[_newIndexPathMap objectForKey:key]];
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}
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}
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return [[IGListIndexPathResult alloc] initWithInserts:[inserts allObjects]
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deletes:[deletes allObjects]
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updates:[NSArray new]
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moves:filteredMoves
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oldIndexPathMap:_oldIndexPathMap
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newIndexPathMap:_newIndexPathMap];
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}
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- (NSIndexPath *)oldIndexPathForIdentifier:(id<NSObject>)identifier {
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return [_oldIndexPathMap objectForKey:identifier];
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}
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- (NSIndexPath *)newIndexPathForIdentifier:(id<NSObject>)identifier {
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return [_newIndexPathMap objectForKey:identifier];
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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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