💾 Archived View for gemini.6px.eu › jimmy › devlog › assets › Emojis.swift.txt captured on 2023-11-04 at 11:33:51.
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// // Emojis.swift // jimmy // // Created by Jonathan Foucher on 20/02/2022. // import Foundation import CryptoKit import SwiftUI struct Emojis { var emoji: String private var codepoints = [ 0x1F300...0x1F5FF, // Misc Symbols and Pictographs 0x1F680...0x1F6FF, // Transport and Map 0x1F600...0x1F64F, // Emoticons 0x1F1E6...0x1F1FF, // Regional country flags 0x2600...0x26FF, // Misc symbols 9728 - 9983 0x2700...0x27BF, // Dingbats 0x1F900...0x1F9FF, // Supplemental Symbols and Pictographs 129280 - 129535 65024...65039, // Variation selector 9100...9300, // Misc items ] init(_ host: String) { let hashed = SHA256.hash(data: Data(host.utf8)) let m = hashed.map( { byte in return String(format: "%02x", byte) }).joined(separator: "") let hs = m[m.startIndex..<String.Index(utf16Offset: 8, in: m)] self.emoji = "❓" for codepoint in codepoints { let count = UInt32(codepoint.upperBound - codepoint.lowerBound) let index = UInt32(hs, radix: 16)! % count + UInt32(codepoint.lowerBound) guard let scalar = UnicodeScalar(index) else { self.emoji = "❓" continue } if Character(scalar).unicodeAvailable() { self.emoji = String(scalar) return } } } } extension Character { private static let refUnicodeSize: CGFloat = 8 private static let refUnicodePng = Character("\u{1f588}").png(ofSize: Character.refUnicodeSize) func unicodeAvailable() -> Bool { if let refUnicodePng = Character.refUnicodePng, let myPng = self.png(ofSize: Character.refUnicodeSize) { return refUnicodePng != myPng } return false } func png(ofSize fontSize: CGFloat) -> Data? { let str = String(self) let size = str.size(withAttributes: [.font: NSFont.systemFont(ofSize: 16.0)]) let img = NSImage(size: size, flipped: false, drawingHandler: { rect in str.draw(in: rect, withAttributes: [.font: NSFont.systemFont(ofSize: 16.0)]) return true }) if let png = img.tiffRepresentation { return png } return nil } }