51 lines
1.6 KiB
Swift
51 lines
1.6 KiB
Swift
//
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// AttributedString+Trim.swift
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// Tusker
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//
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// Created by Shadowfacts on 8/29/18.
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// Copyright © 2018 Shadowfacts. All rights reserved.
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//
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import Foundation
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extension NSAttributedString {
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var fullRange: NSRange {
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return NSRange(location: 0, length: self.length)
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}
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}
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extension NSMutableAttributedString {
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func trimLeadingCharactersInSet(_ charSet: CharacterSet) {
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var end = string.startIndex
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while end < string.endIndex && charSet.contains(string.unicodeScalars[end]) {
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end = string.unicodeScalars.index(after: end)
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}
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if end > string.startIndex {
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let length = string.utf16.distance(from: string.startIndex, to: end)
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replaceCharacters(in: NSRange(location: 0, length: length), with: "")
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}
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}
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func trimTrailingCharactersInSet(_ charSet: CharacterSet) {
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if string.isEmpty {
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return
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}
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var start = string.index(before: string.endIndex)
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while start > string.startIndex && charSet.contains(string.unicodeScalars[start]) {
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start = string.unicodeScalars.index(before: start)
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}
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if start < string.endIndex {
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if start != string.startIndex || !charSet.contains(string.unicodeScalars[start]) {
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start = string.unicodeScalars.index(after: start)
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}
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let location = string.utf16.distance(from: string.startIndex, to: start)
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let length = string.utf16.distance(from: start, to: string.endIndex)
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replaceCharacters(in: NSRange(location: location, length: length), with: "")
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}
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}
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}
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