129 lines
3.7 KiB
Swift
129 lines
3.7 KiB
Swift
//
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// UnicodeScalar.swift
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// SwiftSoup
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//
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// Created by Nabil Chatbi on 14/11/16.
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// Copyright © 2016 Nabil Chatbi. All rights reserved.
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//
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import Foundation
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private let uppercaseSet = CharacterSet.uppercaseLetters
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private let lowercaseSet = CharacterSet.lowercaseLetters
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private let alphaSet = CharacterSet.letters
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private let alphaNumericSet = CharacterSet.alphanumerics
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private let symbolSet = CharacterSet.symbols
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private let digitSet = CharacterSet.decimalDigits
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extension UnicodeScalar {
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public static let BackslashF: UnicodeScalar = UnicodeScalar(12)
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func isMemberOfCharacterSet(_ set: CharacterSet) -> Bool {
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return set.contains(self)
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}
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/// True for any space character, and the control characters \t, \n, \r, \f, \v.
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var isWhitespace: Bool {
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switch self {
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case " ", "\t", "\n", "\r", UnicodeScalar.BackslashF: return true
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case "\u{000B}", "\u{000C}": return true // Form Feed, vertical tab
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default: return false
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}
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}
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/// True for any Unicode space character, and the control characters \t, \n, \r, \f, \v.
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var isUnicodeSpace: Bool {
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switch self {
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case " ", "\t", "\n", "\r", UnicodeScalar.BackslashF: return true
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case "\u{000C}", "\u{000B}", "\u{0085}": return true // Form Feed, vertical tab, next line (nel)
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case "\u{00A0}", "\u{1680}", "\u{180E}": return true // No-break space, ogham space mark, mongolian vowel
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case "\u{2000}"..."\u{200D}": return true // En quad, em quad, en space, em space, three-per-em space, four-per-em space, six-per-em space, figure space, ponctuation space, thin space, hair space, zero width space, zero width non-joiner, zero width joiner.
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case "\u{2028}", "\u{2029}": return true // Line separator, paragraph separator.
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case "\u{202F}", "\u{205F}", "\u{2060}", "\u{3000}", "\u{FEFF}": return true // Narrow no-break space, medium mathematical space, word joiner, ideographic space, zero width no-break space.
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default: return false
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}
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}
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/// `true` if `self` normalized contains a single code unit that is in the categories of Uppercase and Titlecase Letters.
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var isUppercase: Bool {
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return isMemberOfCharacterSet(uppercaseSet)
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}
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/// `true` if `self` normalized contains a single code unit that is in the category of Lowercase Letters.
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var isLowercase: Bool {
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return isMemberOfCharacterSet(lowercaseSet)
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}
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/// `true` if `self` normalized contains a single code unit that is in the categories of Letters and Marks.
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var isAlpha: Bool {
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return isMemberOfCharacterSet(alphaSet)
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}
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/// `true` if `self` normalized contains a single code unit that is in th categories of Letters, Marks, and Numbers.
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var isAlphaNumeric: Bool {
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return isMemberOfCharacterSet(alphaNumericSet)
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}
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/// `true` if `self` normalized contains a single code unit that is in the category of Symbols. These characters include, for example, the dollar sign ($) and the plus (+) sign.
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var isSymbol: Bool {
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return isMemberOfCharacterSet(symbolSet)
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}
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/// `true` if `self` normalized contains a single code unit that is in the category of Decimal Numbers.
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var isDigit: Bool {
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return isMemberOfCharacterSet(digitSet)
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}
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/// `true` if `self` is an ASCII decimal digit, i.e. between "0" and "9".
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var isDecimalDigit: Bool {
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return "0123456789".unicodeScalars.contains(self)
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}
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/// `true` if `self` is an ASCII hexadecimal digit, i.e. "0"..."9", "a"..."f", "A"..."F".
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var isHexadecimalDigit: Bool {
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return "01234567890abcdefABCDEF".unicodeScalars.contains(self)
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}
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/// `true` if `self` is an ASCII octal digit, i.e. between '0' and '7'.
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var isOctalDigit: Bool {
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return "01234567".unicodeScalars.contains(self)
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}
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var uppercase: UnicodeScalar {
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let str = String(self).uppercased()
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return str.unicodeScalar(0)
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}
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}
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