gwennguihal

protocol BulletAdapter: CollectionAdapter {
  var identifier: String
  var className: String
  var height: Float
  var bullet: UIImage { get }  
  var label: NSAttributedString { get }
}

// Descriptor
final class BulletDescriptor: CollectionCellDescribable {

gwennguihal

class MainColorSectionDescriptor: CollectionSectionDescribable {
    
    let backgroundInset = UIEdgeInsetsMake(10, 10, 10, 10)
}

class MyLayout: UICollectionViewFlowLayout {
    //...
    var backgroundAttributes = [IndexPath:UICollectionViewLayoutAttributes]()
    
    override func prepare() {

gwennguihal

import Foundation

struct Style {
    let styling : (String) -> NSMutableAttributedString
}

extension Style {
    static let myStyle = Style { (string) -> NSMutableAttributedString in
        return NSMutableAttributedString(string: string) // add your attributes here
    }

gwennguihal

func fetch() {
    realTimeService.getRecentTweets { [weak self] response in
        switch response {
        case .success(let data):
            self?.collectionData.update(model: data)
            let result = self?.collectionData.update { updater in
                updater.diff()
            }
            if let result = result {
                self?.collectionView.performUpdates(with: result)

gwennguihal

struct TweetAdapter: CollectionAdapter, Diffable {

    let label:NSAttributedString
    let imageURL:URL
    let backgroundColor:UIColor
    
    init(tweet:Tweet) {
        label = ...
        imageURL = ...
        backgroundColor = ...

gwennguihal

final class RealTimeCollectionData : CollectionData {
    
    var model:RealTimeModel?
    
    func update(model:RealTimeModel) {
        self.model = model
    }
    
    override func reloadData() {
        super.reloadData()

gwennguihal

fileprivate lazy var decorationViewHandler:DecorationViewsHandler = DecorationViewsHandler(collectionViewLayout: self)
// ...
decorationViewHandler.register(viewClass: SimpleDecorationView.self, for: sectionBackgroundKind)

gwennguihal

override func prepare() {
  super.prepare()
  decorationViewHandler.prepare()
  //...
  let backgroundAttributes = SimpleDecorationViewLayoutAttributes(forDecorationViewOfKind: sectionBackgroundKind, with: firstCellIndexPath)
  decorationViewHandler.add(attributes: backgroundAttributes)
}

override func layoutAttributesForDecorationView(ofKind elementKind: String, at atIndexPath: IndexPath) -> UICollectionViewLayoutAttributes? {
  return decorationViewHandler.attributes(for: elementKind, at: atIndexPath)

gwennguihal

let decorationAttributes = decorationViewHandler.attributes(in:rect)

gwennguihal

override func prepare(forCollectionViewUpdates updateItems: [UICollectionViewUpdateItem]) {
    super.prepare(forCollectionViewUpdates: updateItems)
    decorationViewHandler.prepare(forCollectionViewUpdates: updateItems)
}

override func indexPathsToInsertForDecorationView(ofKind elementKind: String) -> [IndexPath] {
    return decorationViewHandler.inserted(for: elementKind)
}

override func indexPathsToDeleteForDecorationView(ofKind elementKind: String) -> [IndexPath] {