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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,38 @@ | ||
| import MapboxCoreNavigation | ||
|
|
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| extension ElectronicHorizon.Edge { | ||
| var mpp: [ElectronicHorizon.Edge]? { | ||
|
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| guard level == 0 else { return nil } | ||
|
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| var mostProbablePath = [self] | ||
|
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| for child in outletEdges { | ||
| if let childMPP = child.mpp { | ||
| mostProbablePath.append(contentsOf: childMPP) | ||
| } | ||
| } | ||
|
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| return mostProbablePath | ||
| } | ||
|
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| func edgeNames(roadGraph: RoadGraph) -> [String] { | ||
| guard let metadata = roadGraph.edgeMetadata(edgeIdentifier: identifier) else { | ||
| return [] | ||
| } | ||
| let names = metadata.names.map { name -> String in | ||
| switch name { | ||
| case .name(let name): | ||
| return name | ||
| case .code(let code): | ||
| return "(\(code))" | ||
| } | ||
| } | ||
|
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| // If the road is unnamed, fall back to the road class. | ||
| if names.isEmpty { | ||
| return ["\(metadata.mapboxStreetsRoadClass.rawValue)"] | ||
| } | ||
| return names | ||
| } | ||
| } |
133 changes: 133 additions & 0 deletions
133
Sources/MapboxNavigation/NavigationMapView+IntersectionAnnotations.swift
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,133 @@ | ||
| import CoreLocation | ||
| import UIKit | ||
| import MapboxDirections | ||
| import MapboxCoreNavigation | ||
| import Turf | ||
| import MapboxMaps | ||
|
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| extension NavigationMapView { | ||
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| struct EdgeIntersection { | ||
| var root: ElectronicHorizon.Edge | ||
| var branch: ElectronicHorizon.Edge | ||
| var rootMetadata: ElectronicHorizon.Edge.Metadata | ||
| var rootShape: LineString | ||
| var branchMetadata: ElectronicHorizon.Edge.Metadata | ||
| var branchShape: LineString | ||
|
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| var coordinate: CLLocationCoordinate2D? { | ||
| rootShape.coordinates.first | ||
| } | ||
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| var annotationPoint: CLLocationCoordinate2D? { | ||
| guard let length = branchShape.distance() else { return nil } | ||
| let targetDistance = min(length / 2, Double.random(in: 15...30)) | ||
| guard let annotationPoint = branchShape.coordinateFromStart(distance: targetDistance) else { return nil } | ||
| return annotationPoint | ||
| } | ||
|
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| var wayName: String? { | ||
| guard let roadName = rootMetadata.names.first else { return nil } | ||
|
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| switch roadName { | ||
| case .name(let name): | ||
| return name | ||
| case .code(let code): | ||
| return "(\(code))" | ||
| } | ||
| } | ||
| var intersectingWayName: String? { | ||
| guard let roadName = branchMetadata.names.first else { return nil } | ||
|
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| switch roadName { | ||
| case .name(let name): | ||
| return name | ||
| case .code(let code): | ||
| return "(\(code))" | ||
| } | ||
| } | ||
|
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| var incidentAngle: CLLocationDegrees { | ||
| return (branchMetadata.heading - rootMetadata.heading).wrap(min: 0, max: 360) | ||
| } | ||
|
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| var description: String { | ||
| return "EdgeIntersection: root: \(wayName ?? "") intersection: \(intersectingWayName ?? "") coordinate: \(String(describing: coordinate))" | ||
| } | ||
| } | ||
|
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| enum AnnotationTailPosition: Int { | ||
| case left | ||
| case right | ||
| case center | ||
| } | ||
|
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| class AnnotationCacheEntry: Equatable, Hashable { | ||
| var wayname: String | ||
| var coordinate: CLLocationCoordinate2D | ||
| var intersection: EdgeIntersection? | ||
| var feature: Feature | ||
| var lastAccessTime: Date | ||
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| init(coordinate: CLLocationCoordinate2D, wayname: String, intersection: EdgeIntersection? = nil, feature: Feature) { | ||
| self.wayname = wayname | ||
| self.coordinate = coordinate | ||
| self.intersection = intersection | ||
| self.feature = feature | ||
| self.lastAccessTime = Date() | ||
| } | ||
|
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| static func == (lhs: AnnotationCacheEntry, rhs: AnnotationCacheEntry) -> Bool { | ||
| return lhs.wayname == rhs.wayname | ||
| } | ||
|
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| func hash(into hasher: inout Hasher) { | ||
| hasher.combine(wayname.hashValue) | ||
| } | ||
| } | ||
|
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| class AnnotationCache { | ||
| private let maxEntryAge = TimeInterval(30) | ||
| var entries = Set<AnnotationCacheEntry>() | ||
| var cachePruningTimer: Timer? | ||
|
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| init() { | ||
| // periodically prune the cache to remove entries that have been passed already | ||
| cachePruningTimer = Timer.scheduledTimer(withTimeInterval: 15, repeats: true, block: { [weak self] _ in | ||
| self?.prune() | ||
| }) | ||
| } | ||
|
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| deinit { | ||
| cachePruningTimer?.invalidate() | ||
| cachePruningTimer = nil | ||
| } | ||
|
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| func setValue(feature: Feature, coordinate: CLLocationCoordinate2D, intersection: EdgeIntersection?, for wayname: String) { | ||
| entries.insert(AnnotationCacheEntry(coordinate: coordinate, wayname: wayname, intersection: intersection, feature: feature)) | ||
| } | ||
|
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| func value(for wayname: String) -> AnnotationCacheEntry? { | ||
| let matchingEntry = entries.first { entry -> Bool in | ||
| entry.wayname == wayname | ||
| } | ||
|
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| if let matchingEntry = matchingEntry { | ||
| // update the timestamp used for pruning the cache | ||
| matchingEntry.lastAccessTime = Date() | ||
| } | ||
|
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| return matchingEntry | ||
| } | ||
|
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| private func prune() { | ||
| let now = Date() | ||
|
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| entries.filter { now.timeIntervalSince($0.lastAccessTime) > maxEntryAge }.forEach { remove($0) } | ||
| } | ||
|
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| public func remove(_ entry: AnnotationCacheEntry) { | ||
| entries.remove(entry) | ||
| } | ||
| } | ||
| } |
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