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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,98 @@ | ||
| // | ||
| // Boundable.swift | ||
| // SwiftGeo | ||
| // | ||
| // Created by Rémi Bardon on 04/02/2022. | ||
| // Copyright © 2022 Rémi Bardon. All rights reserved. | ||
| // | ||
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| import GeoModels | ||
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| public protocol Boundable { | ||
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| associatedtype BoundingBox: GeoModels.BoundingBox | ||
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| var _bbox: BoundingBox { get } | ||
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| } | ||
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| extension Boundable { | ||
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| public var bbox: BoundingBox { _bbox } | ||
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| } | ||
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| extension Boundable where Self: Hashable { | ||
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| public var bbox: BoundingBox { BoundingBoxCache.shared.bbox(for: self) } | ||
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| } | ||
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| extension Coordinate2D { | ||
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| public var _bbox: BoundingBox2D { | ||
| BoundingBox2D(southWest: self, width: .zero, height: .zero) | ||
| } | ||
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| } | ||
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| extension Coordinate3D: Boundable { | ||
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| public var _bbox: BoundingBox3D { | ||
| BoundingBox3D(southWestLow: self, width: .zero, height: .zero, zHeight: .zero) | ||
| } | ||
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| } | ||
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| extension Line2D: Boundable { | ||
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| public var _bbox: BoundingBox2D { | ||
| Turf.bbox(for: [start, end])! | ||
| } | ||
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| } | ||
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| extension Line3D: Boundable { | ||
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| public var _bbox: BoundingBox3D { | ||
| Turf.bbox(for: [start, end])! | ||
| } | ||
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| } | ||
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| extension BoundingBox2D: Boundable { | ||
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| public var _bbox: BoundingBox2D { self } | ||
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| } | ||
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| extension BoundingBox3D: Boundable { | ||
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| public var _bbox: BoundingBox3D { self } | ||
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| } | ||
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| // Extension of protocol 'Collection' cannot have an inheritance clause | ||
| //extension Collection: Boundable where Element: Boundable { | ||
| // | ||
| // public var _bbox: Element.BoundingBox { | ||
| // self.reduce(.zero, { $0.union($1.bbox) }) | ||
| // } | ||
| // | ||
| //} | ||
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| extension Array: Boundable where Element: Boundable { | ||
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| public var _bbox: Element.BoundingBox { | ||
| self.reduce(.zero, { $0.union($1.bbox) }) | ||
| } | ||
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| } | ||
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| extension Set: Boundable where Element: Boundable { | ||
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| public var _bbox: Element.BoundingBox { | ||
| self.reduce(.zero, { $0.union($1.bbox) }) | ||
| } | ||
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| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,41 @@ | ||
| // | ||
| // BoundingBoxCache.swift | ||
| // SwiftGeo | ||
| // | ||
| // Created by Rémi Bardon on 10/02/2022. | ||
| // Copyright © 2022 Rémi Bardon. All rights reserved. | ||
| // | ||
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| import GeoModels | ||
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| public class BoundingBoxCache { | ||
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| public static let shared = BoundingBoxCache() | ||
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| private var values = [AnyHashable: Any]() | ||
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| private init() {} | ||
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| internal func store<B: BoundingBox, K: Hashable>(_ value: B, forKey key: K) { | ||
| values[AnyHashable(key)] = value | ||
| } | ||
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| internal func get<B: BoundingBox, K: Hashable>(_ type: B.Type, forKey key: K) -> B? { | ||
| values[AnyHashable(key)] as? B | ||
| } | ||
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| public func bbox<B: Boundable & Hashable>(for boundable: B) -> B.BoundingBox { | ||
| if let cachedValue = self.get(B.BoundingBox.self, forKey: boundable) { | ||
| return cachedValue | ||
| } else { | ||
| let bbox = boundable._bbox | ||
| self.store(bbox, forKey: boundable) | ||
| return bbox | ||
| } | ||
| } | ||
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| public func removeCache<K: Hashable>(for key: K) { | ||
| values.removeValue(forKey: AnyHashable(key)) | ||
| } | ||
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| } |