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Merge pull request #1222 from Adlai-Holler/AHFixChangeSetIssues

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[_ASHierarchyChangeSet] Improve Logic when Shifting Indexes
This commit is contained in:
appleguy 2016-02-12 13:27:49 -08:00
commit c1ca225e8d
1 changed files with 28 additions and 9 deletions
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37
AsyncDisplayKit/Private/_ASHierarchyChangeSet.m
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@ -106,8 +106,15 @@
return NSNotFound;
}
NSInteger indexAfterDeletes = oldSection - [_deletedSections countOfIndexesInRange:NSMakeRange(0, oldSection)];
return indexAfterDeletes + [_insertedSections countOfIndexesInRange:NSMakeRange(0, indexAfterDeletes)];
__block NSInteger newIndex = oldSection - [_deletedSections countOfIndexesInRange:NSMakeRange(0, oldSection)];
[_insertedSections enumerateIndexesUsingBlock:^(NSUInteger idx, BOOL * _Nonnull stop) {
if (idx <= newIndex) {
newIndex += 1;
} else {
*stop = YES;
}
}];
return newIndex;
}
- (void)deleteItems:(NSArray *)indexPaths animationOptions:(ASDataControllerAnimationOptions)options
@ -213,20 +220,32 @@
// - delete/reload indexPaths that are passed in should all be their current indexPaths
// - insert indexPaths that are passed in should all be their future indexPaths after deletions
for (NSIndexPath *indexPath in change.indexPaths) {
NSUInteger section = indexPath.section;
NSUInteger row = indexPath.row;
__block NSUInteger section = indexPath.section;
__block NSUInteger row = indexPath.row;
// Update section number based on section insertions/deletions that are above the current section
section -= [_deletedSections countOfIndexesInRange:NSMakeRange(0, section + 1)];
section += [_insertedSections countOfIndexesInRange:NSMakeRange(0, section + 1)];
section -= [_deletedSections countOfIndexesInRange:NSMakeRange(0, section)];
[_insertedSections enumerateIndexesUsingBlock:^(NSUInteger idx, BOOL * _Nonnull stop) {
if (idx <= section) {
section += 1;
} else {
*stop = YES;
}
}];
// Update row number based on deletions that are above the current row in the current section
NSIndexSet *indicesDeletedInSection = deletedIndexPathsMap[@(indexPath.section)];
row -= [indicesDeletedInSection countOfIndexesInRange:NSMakeRange(0, row + 1)];
row -= [indicesDeletedInSection countOfIndexesInRange:NSMakeRange(0, row)];
// Update row number based on insertions that are above the current row in the future section
NSIndexSet *indicesInsertedInSection = insertedIndexPathsMap[@(section)];
row += [indicesInsertedInSection countOfIndexesInRange:NSMakeRange(0, row + 1)];
[indicesInsertedInSection enumerateIndexesUsingBlock:^(NSUInteger idx, BOOL * _Nonnull stop) {
if (idx <= row) {
row += 1;
} else {
*stop = YES;
}
}];
//TODO: reuse the old indexPath object if section and row aren't changed
NSIndexPath *newIndexPath = [NSIndexPath indexPathForRow:row inSection:section];
@ -348,7 +367,7 @@
for (_ASHierarchyItemChange *change in changes) {
NSAssert(change.changeType == changeType, @"The map we created must all be of the same changeType as of now");
for (NSIndexPath *indexPath in change.indexPaths) {
NSString *sectionKey = @(indexPath.section);
NSNumber *sectionKey = @(indexPath.section);
NSMutableIndexSet *indexSet = sectionToIndexSetMap[sectionKey];
if (indexSet) {
[indexSet addIndex:indexPath.row];