53 lines
1.9 KiB
Swift
53 lines
1.9 KiB
Swift
//
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// Copyright (c) 2022 Touch Instinct
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the Software), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED AS IS, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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// THE SOFTWARE.
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//
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import UIKit.UIImage
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open class DefaultCachableMarkerIconFactory<M, K: AnyObject>: DefaultMarkerIconFactory<M> {
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public typealias CacheKeyProvider = (M) -> K
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public let cache = NSCache<K, UIImage>()
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private let cacheKeyProvider: CacheKeyProvider
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public init(createIconClosure: @escaping CreateIconClosure,
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cacheKeyProvider: @escaping CacheKeyProvider) {
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self.cacheKeyProvider = cacheKeyProvider
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super.init(createIconClosure: createIconClosure)
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}
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open override func markerIcon(for model: M) -> UIImage {
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let cacheKey = cacheKeyProvider(model)
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guard let cachedIcon = cache.object(forKey: cacheKey) else {
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let icon = super.markerIcon(for: model)
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cache.setObject(icon, forKey: cacheKey)
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return icon
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}
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return cachedIcon
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}
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}
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