86 lines
2.5 KiB
Swift
86 lines
2.5 KiB
Swift
//
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// LoadControllerSkinImageOperation.swift
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// Delta
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//
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// Created by Riley Testut on 10/28/16.
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// Copyright © 2016 Riley Testut. All rights reserved.
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//
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import UIKit
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import DeltaCore
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import Roxas
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extension LoadControllerSkinImageOperation
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{
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enum Error: Swift.Error
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{
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case doesNotExist
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case unsupportedTraits
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}
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}
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class ControllerSkinImageCacheKey: NSObject
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{
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let controllerSkin: ControllerSkin
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let traits: DeltaCore.ControllerSkin.Traits
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let size: DeltaCore.ControllerSkin.Size
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override var hash: Int {
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return self.controllerSkin.hashValue ^ self.traits.hashValue ^ self.size.hashValue
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}
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init(controllerSkin: ControllerSkin, traits: DeltaCore.ControllerSkin.Traits, size: DeltaCore.ControllerSkin.Size)
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{
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self.controllerSkin = controllerSkin
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self.traits = traits
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self.size = size
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super.init()
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}
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override func isEqual(_ object: Any?) -> Bool
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{
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guard let object = object as? ControllerSkinImageCacheKey else { return false }
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return self.controllerSkin == object.controllerSkin && self.traits == object.traits && self.size == object.size
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}
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}
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class LoadControllerSkinImageOperation: RSTLoadOperation<UIImage, ControllerSkinImageCacheKey>
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{
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let controllerSkin: ControllerSkin
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let traits: DeltaCore.ControllerSkin.Traits
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let size: DeltaCore.ControllerSkin.Size
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init(controllerSkin: ControllerSkin, traits: DeltaCore.ControllerSkin.Traits, size: DeltaCore.ControllerSkin.Size)
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{
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self.controllerSkin = controllerSkin
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self.traits = traits
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self.size = size
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let cacheKey = ControllerSkinImageCacheKey(controllerSkin: controllerSkin, traits: traits, size: size)
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super.init(cacheKey: cacheKey)
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}
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override func loadResult(completion: @escaping (UIImage?, Swift.Error?) -> Void)
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{
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guard let traits = self.controllerSkin.supportedTraits(for: self.traits) else {
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completion(nil, Error.unsupportedTraits)
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return
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}
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guard let image = self.controllerSkin.image(for: traits, preferredSize: self.size) else {
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completion(nil, Error.doesNotExist)
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return
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}
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// Force decompression of image
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UIGraphicsBeginImageContextWithOptions(CGSize(width: 1, height: 1), true, 1.0)
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image.draw(at: CGPoint.zero)
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UIGraphicsEndImageContext()
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completion(image, nil)
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}
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}
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