38 lines
1.5 KiB
Swift
38 lines
1.5 KiB
Swift
import QuickLookThumbnailing
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import os // OSLog
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private let log = OSLog(subsystem: Bundle.main.bundleIdentifier!, category: "thumbnail-plugin")
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extension QLThumbnailReply {
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/// call private method `setIconFlavor:`
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/// see https://medium.com/swlh/calling-ios-and-macos-hidden-api-in-style-1a924f244ad1
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fileprivate func setFlavor(_ flavor: Int) {
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typealias setIconFlavorMethod = @convention(c) (NSObject, Selector, NSInteger) -> Bool
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let selector = NSSelectorFromString("setIconFlavor:")
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let imp = self.method(for: selector)
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let method = unsafeBitCast(imp, to: setIconFlavorMethod.self)
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_ = method(self, selector, flavor)
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}
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}
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class ThumbnailProvider: QLThumbnailProvider {
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override func provideThumbnail(for request: QLFileThumbnailRequest, _ handler: @escaping (QLThumbnailReply?, Error?) -> Void) {
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let meta = MetaInfo(request.fileURL)
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let img = AppIcon(meta).extractImageForThumbnail().withRoundCorners()
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// First way: Draw the thumbnail into the current context, set up with UIKit's coordinate system.
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let reply = QLThumbnailReply(contextSize: request.maximumSize, currentContextDrawing: { () -> Bool in
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img.draw(in: CGRect(origin: .zero, size: request.maximumSize))
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return true
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})
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// defer in case `setFlavor` fails
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defer {
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handler(reply, nil)
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}
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// 0: Plain transparent, 1: Shadow, 2: Book, 3: Movie, 4: Address, 5: Image,
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// 6: Gloss, 7: Slide, 8: Square, 9: Border, 11: Calendar, 12: Pattern
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reply.setFlavor(meta.type == .Archive ? 12 : 0) // .archive looks like "in development"
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}
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}
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