Juraldinio
49 lines
1.6 KiB
Swift
49 lines
1.6 KiB
Swift
//
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// UserFieldFormatter.swift
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// PrivadoVPN
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//
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// Created by Juraldinio on 7/1/21.
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// Copyright © 2021 Privado LLC. All rights reserved.
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//
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import Foundation
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final class UserFieldFormatter: Formatter {
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private lazy var disallowedCharacters: CharacterSet = {
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var allowed = CharacterSet()
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allowed.formUnion(.decimalDigits)
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allowed.insert(charactersIn: "@_-.")
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allowed.insert(charactersIn: "QWERTYUIOPASDFGHJKLZXCVBNM")
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allowed.insert(charactersIn: "qwertyuiopasdfghjklzxcvbnm")
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return allowed.inverted
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}()
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private var current = ""
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override func isPartialStringValid(_ partialString: String, newEditingString newString: AutoreleasingUnsafeMutablePointer<NSString?>?, errorDescription error: AutoreleasingUnsafeMutablePointer<NSString?>?) -> Bool {
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let length = partialString.count
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guard length > 0 else { return true }
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let result = partialString.trimmingCharacters(in: self.disallowedCharacters)
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if length == result.count { self.current = partialString }
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return length == result.count
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}
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override func string(for obj: Any?) -> String? {
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if obj.isExist
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, let string = obj as? String {
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return string
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}
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return self.current
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}
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override func getObjectValue(_ obj: AutoreleasingUnsafeMutablePointer<AnyObject?>?, for string: String, errorDescription error: AutoreleasingUnsafeMutablePointer<NSString?>?) -> Bool {
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obj?.pointee = string as AnyObject
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return true
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}
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}
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