Ryo Aoyama
82 lines
2.9 KiB
Swift
82 lines
2.9 KiB
Swift
import AppKit
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import DiffableDataSources
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final class MountainsViewController: NSViewController {
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enum Section {
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case main
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}
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struct Mountain: Hashable {
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var name: String
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func contains(_ filter: String) -> Bool {
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guard !filter.isEmpty else {
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return true
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}
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let lowercasedFilter = filter.lowercased()
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return name.lowercased().contains(lowercasedFilter)
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}
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}
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@IBOutlet private var searchField: NSSearchField!
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@IBOutlet private var collectionView: NSCollectionView!
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private lazy var dataSource = CocoaCollectionViewDiffableDataSource<Section, Mountain>(collectionView: collectionView) { collectionView, indexPath, mountain in
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let item = collectionView.makeItem(withIdentifier: LabelItem.itemIdentifier, for: indexPath) as! LabelItem
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item.label.stringValue = mountain.name
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return item
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}
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private let allMountains: [Mountain] = mountainsRawData.components(separatedBy: .newlines).map { line in
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let name = line.components(separatedBy: ",")[0]
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return Mountain(name: name)
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}
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override func viewDidLoad() {
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super.viewDidLoad()
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title = "Mountains Search"
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collectionView.delegate = self
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collectionView.register(LabelItem.self, forItemWithIdentifier: LabelItem.itemIdentifier)
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search(filter: "")
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}
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func search(filter: String) {
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let mountains = allMountains.lazy
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.filter { $0.contains(filter) }
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.sorted { $0.name < $1.name }
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let snapshot = DiffableDataSourceSnapshot<Section, Mountain>()
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snapshot.appendSections([.main])
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snapshot.appendItems(mountains)
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dataSource.apply(snapshot)
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}
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@IBAction func searchFieldDidChangeText(_ sender: NSSearchField) {
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search(filter: sender.stringValue)
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}
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}
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extension MountainsViewController: NSCollectionViewDelegateFlowLayout {
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func collectionView(_ collectionView: NSCollectionView, layout collectionViewLayout: NSCollectionViewLayout, minimumInteritemSpacingForSectionAt section: Int) -> CGFloat {
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return 10
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}
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func collectionView(_ collectionView: NSCollectionView, layout collectionViewLayout: NSCollectionViewLayout, minimumLineSpacingForSectionAt section: Int) -> CGFloat {
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return 10
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}
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func collectionView(_ collectionView: NSCollectionView, layout collectionViewLayout: NSCollectionViewLayout, insetForSectionAt section: Int) -> NSEdgeInsets {
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return NSEdgeInsets(top: 10, left: 10, bottom: 10, right: 10)
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}
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func collectionView(_ collectionView: NSCollectionView, layout collectionViewLayout: NSCollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> NSSize {
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let column = 3
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let width = (collectionView.bounds.width - 10 * CGFloat(column + 1)) / CGFloat(column)
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return CGSize(width: width, height: 44)
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}
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}
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