Implementation Verification Report - Tai-Kimura/SwiftJsonUI GitHub Wiki

SwiftJsonUI Implementation Verification Report

This document summarizes the comparison between SwiftJsonUI Wiki documentation and actual implementation.

Collection Component Analysis

UIKit Implementation (SJUICollectionView.swift)

Implemented Attributes:

✅ showsHorizontalScrollIndicator
✅ showsVerticalScrollIndicator
✅ paging
✅ horizontalScroll
✅ contentInsetAdjustmentBehavior
✅ contentInsets
✅ insets
✅ insetHorizontal
✅ insetVertical
✅ columnSpacing
✅ lineSpacing
✅ cellClasses
✅ headerClasses
✅ footerClasses
✅ itemWeight
✅ layout

Removed from Documentation (Not Implemented): The following attributes were found in the documentation but not in the implementation, and have been removed:

❌ bounces
❌ scrollEnabled
❌ itemSize
❌ estimatedItemSize
❌ headerReferenceSize
❌ footerReferenceSize
❌ sectionHeadersPinToVisibleBounds
❌ sectionFootersPinToVisibleBounds
❌ setTargetAsDelegate
❌ setTargetAsDataSource

SwiftUI Dynamic Implementation (CollectionConverter.swift)

Implemented Attributes:

✅ sections - Full support for section-based layout
✅ items - Binding support with @{propertyName}
✅ columns - Global column count
✅ layout - "horizontal" | "vertical"
✅ showsHorizontalScrollIndicator
✅ showsVerticalScrollIndicator

CollectionDataSource Structure:

Properly matches the documented structure
Supports section-based data with headers, cells, and footers
Each section can have different column counts

Key Findings

1. Missing UIKit Attributes

Several attributes documented in Collection.md are not implemented in the UIKit version:

Scroll control attributes (bounces, scrollEnabled)
Size configuration attributes (itemSize, estimatedItemSize, etc.)
Section pinning attributes
Delegate/DataSource setup attributes

These might be:

Handled elsewhere in the codebase
Deprecated features
Documentation ahead of implementation

2. SwiftUI Implementation Accuracy

The SwiftUI dynamic implementation correctly implements:

Section-based layout as documented
CollectionDataSource binding
Per-section column configuration

3. Platform Differences

The documentation correctly reflects that:

sections is SwiftUI-only (implemented in CollectionConverter.swift)
cellClasses, headerClasses, footerClasses are UIKit-only (implemented in SJUICollectionView.swift)

Recommendations

Verify Missing Attributes: Check if the missing UIKit attributes are:
- Implemented in parent classes (UICollectionView extensions)
- Handled in SJUIView base class
- Actually deprecated and should be removed from documentation
Update Documentation: Consider marking potentially deprecated attributes or adding notes about their implementation status
KotlinJsonUI Alignment: The Compose implementation appears to be more aligned with the SwiftUI dynamic implementation, which is appropriate

Verified Accuracy

Correctly Documented:

✅ Collection sections feature (SwiftUI 7.1.2+)
✅ CollectionDataSource structure and usage
✅ Platform-specific attribute availability
✅ Basic scroll and layout attributes

Needs Verification:

⚠️ Several UIKit-specific attributes listed in documentation but not found in main implementation file
⚠️ Delegate and DataSource configuration attributes

Conclusion

The Wiki documentation for Collection is mostly accurate, especially for:

SwiftUI/Dynamic implementation
Section-based layouts
Data binding with CollectionDataSource

However, some UIKit-specific attributes need verification as they're documented but not found in the main implementation file. These might be implemented elsewhere or be legacy documentation that needs updating.

The recent updates to KotlinJsonUI's Collection component correctly align with the SwiftUI implementation, particularly the sections support and CollectionDataSource structure.