Make Cell Node Properties Atomic - #74
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| * The table- or collection-node that this cell is a member of, if any. | ||
| */ | ||
| @property (weak, nonatomic, readonly, nullable) ASDisplayNode *owningNode; | ||
| @property (weak, readonly, nullable) id<ASRangeManagedNode> owningNode; |
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This s technically a breaking API change but it's so minor that we shouldn't worry about it. Virtually nobody uses this property – it was recently added and probably shouldn't be public anyway – and the migration pathway is trivial.
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Hmm I wonder if |
| */ | ||
| //TODO change this to be a generic "kind" or "elementKind" that exposes `nil` for row kind | ||
| @property (nonatomic, copy, readonly, nullable) NSString *supplementaryElementKind; | ||
| @property (copy, readonly, nullable) NSString *supplementaryElementKind; |
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I know it is implied, but stylistically, I think it would be a good idea to require atomic to be stated explicitly for properties that intend it. Although it might become the more common thing, currently it's uncommon enough that most cases where it is omitted could be confused for mistakes. Any thoughts?
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I'm down with it. The explicitness is nice.
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@Adlai-Holler Yes, I still think having a true bass class would be a very good thing. It would be a substantial project to build - I attempted it over Christmas holiday the year before this most recent, and it got complicated. I think it would be an architectural gift that keeps on giving, though :). In particular, it could even provide some APIs that are appropriate to offer publicly, and allow advanced apps to create custom range-managed scrollers. |
| /** | ||
| * Basically ASTableNode or ASCollectionNode. | ||
| */ | ||
| @protocol ASRangeManagedNode <NSObject, ASTraitEnvironment> |
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Maybe I'm being overly semantic, but the methods these adopt don't seem to match the name. I can imagine nodes that range manage other nodes that don't have index paths. Anyway, wondering if there's a better name but I don't have suggestions.
Also, should it be ASRangeManagingNode instead? That would better align with ASHierarchyStateRangeManaged state naming.
| @@ -80,7 +80,7 @@ - (instancetype)initWithStyle:(UITableViewStyle)style | |||
| [self setViewBlock:^{ | |||
| // Variable will be unused if event logging is off. | |||
| __unused __typeof__(self) strongSelf = weakSelf; | |||
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Is the strongSelf necessary? If the viewBlock is running, self shouldn't be nil, right?
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Yep but we should strongify once, rather than implicitly strongifying each time we use weakSelf.
| * This property will only be changed on the main thread. | ||
| */ | ||
| @property (nonatomic, strong, readonly) ASElementMap *visibleMap; | ||
| @property (atomic, copy, readonly) ASElementMap *visibleMap; |
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Are there asserts that ensure this?
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We don't need asserts to check this. We only change it internally. And we can't override atomic accessors so it's impossible to assert.
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This way if you do logging or other tasks on background threads, you can read
indexPathandsupplementaryElementKindsafely.It kind of spiraled out of control, so:
ASRangeManagedNodeprotocol to coverASCollectionNodeandASTableNode.ASDataControllerEnvironmentDelegate– instead pass inASRangeManagedNodeto init.ASDataController.visibleMap/pendingMapatomic.ASCellNode.owningNodeatomic.