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Refactor TextFormat
This commit is contained in:
Peter
652
submodules/TextFormat/Sources/ChatTextInputAttributes.swift
Normal file
652
submodules/TextFormat/Sources/ChatTextInputAttributes.swift
Normal file
@@ -0,0 +1,652 @@
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import Foundation
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import UIKit
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import Display
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import AsyncDisplayKit
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import Postbox
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import TelegramPresentationData
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private let alphanumericCharacters = CharacterSet.alphanumerics
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public struct ChatTextInputAttributes {
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public static let bold = NSAttributedString.Key(rawValue: "Attribute__Bold")
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public static let italic = NSAttributedString.Key(rawValue: "Attribute__Italic")
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public static let monospace = NSAttributedString.Key(rawValue: "Attribute__Monospace")
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public static let strikethrough = NSAttributedString.Key(rawValue: "Attribute__Strikethrough")
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public static let underline = NSAttributedString.Key(rawValue: "Attribute__Underline")
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public static let textMention = NSAttributedString.Key(rawValue: "Attribute__TextMention")
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public static let textUrl = NSAttributedString.Key(rawValue: "Attribute__TextUrl")
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public static let allAttributes = [ChatTextInputAttributes.bold, ChatTextInputAttributes.italic, ChatTextInputAttributes.monospace, ChatTextInputAttributes.strikethrough, ChatTextInputAttributes.underline, ChatTextInputAttributes.textMention, ChatTextInputAttributes.textUrl]
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}
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public func stateAttributedStringForText(_ text: NSAttributedString) -> NSAttributedString {
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let result = NSMutableAttributedString(string: text.string)
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let fullRange = NSRange(location: 0, length: result.length)
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text.enumerateAttributes(in: fullRange, options: [], using: { attributes, range, _ in
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for (key, value) in attributes {
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if ChatTextInputAttributes.allAttributes.contains(key) {
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result.addAttribute(key, value: value, range: range)
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}
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}
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})
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return result
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}
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public struct ChatTextFontAttributes: OptionSet {
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public var rawValue: Int32 = 0
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public init(rawValue: Int32) {
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self.rawValue = rawValue
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}
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public static let bold = ChatTextFontAttributes(rawValue: 1 << 0)
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public static let italic = ChatTextFontAttributes(rawValue: 1 << 1)
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public static let monospace = ChatTextFontAttributes(rawValue: 1 << 2)
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public static let blockQuote = ChatTextFontAttributes(rawValue: 1 << 3)
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}
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public func textAttributedStringForStateText(_ stateText: NSAttributedString, fontSize: CGFloat, textColor: UIColor, accentTextColor: UIColor) -> NSAttributedString {
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let result = NSMutableAttributedString(string: stateText.string)
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let fullRange = NSRange(location: 0, length: result.length)
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result.addAttribute(NSAttributedString.Key.font, value: Font.regular(fontSize), range: fullRange)
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result.addAttribute(NSAttributedString.Key.foregroundColor, value: textColor, range: fullRange)
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stateText.enumerateAttributes(in: fullRange, options: [], using: { attributes, range, _ in
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var fontAttributes: ChatTextFontAttributes = []
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for (key, value) in attributes {
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if key == ChatTextInputAttributes.textMention || key == ChatTextInputAttributes.textUrl {
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result.addAttribute(key, value: value, range: range)
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result.addAttribute(NSAttributedString.Key.foregroundColor, value: accentTextColor, range: range)
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if accentTextColor.isEqual(textColor) {
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result.addAttribute(NSAttributedString.Key.underlineStyle, value: NSUnderlineStyle.single.rawValue as NSNumber, range: range)
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}
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} else if key == ChatTextInputAttributes.bold {
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result.addAttribute(key, value: value, range: range)
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fontAttributes.insert(.bold)
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} else if key == ChatTextInputAttributes.italic {
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result.addAttribute(key, value: value, range: range)
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fontAttributes.insert(.italic)
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} else if key == ChatTextInputAttributes.monospace {
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result.addAttribute(key, value: value, range: range)
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fontAttributes.insert(.monospace)
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} else if key == ChatTextInputAttributes.strikethrough {
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result.addAttribute(key, value: value, range: range)
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result.addAttribute(NSAttributedString.Key.strikethroughStyle, value: NSUnderlineStyle.single.rawValue as NSNumber, range: range)
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} else if key == ChatTextInputAttributes.underline {
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result.addAttribute(key, value: value, range: range)
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result.addAttribute(NSAttributedString.Key.underlineStyle, value: NSUnderlineStyle.single.rawValue as NSNumber, range: range)
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}
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}
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if !fontAttributes.isEmpty {
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var font: UIFont?
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if fontAttributes == [.bold, .italic, .monospace] {
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font = Font.semiboldItalicMonospace(fontSize)
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} else if fontAttributes == [.bold, .monospace] {
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font = Font.semiboldMonospace(fontSize)
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} else if fontAttributes == [.italic, .monospace] {
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font = Font.italicMonospace(fontSize)
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} else if fontAttributes == [.bold, .italic] {
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font = Font.semiboldItalic(fontSize)
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} else if fontAttributes == [.bold] {
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font = Font.semibold(fontSize)
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} else if fontAttributes == [.italic] {
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font = Font.italic(fontSize)
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} else if fontAttributes == [.monospace] {
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font = Font.monospace(fontSize)
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}
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if let font = font {
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result.addAttribute(NSAttributedString.Key.font, value: font, range: range)
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}
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}
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})
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return result
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}
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public final class ChatTextInputTextMentionAttribute: NSObject {
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public let peerId: PeerId
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public init(peerId: PeerId) {
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self.peerId = peerId
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super.init()
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}
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override public func isEqual(_ object: Any?) -> Bool {
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if let other = object as? ChatTextInputTextMentionAttribute {
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return self.peerId == other.peerId
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} else {
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return false
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}
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}
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}
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private func textMentionRangesEqual(_ lhs: [(NSRange, ChatTextInputTextMentionAttribute)], _ rhs: [(NSRange, ChatTextInputTextMentionAttribute)]) -> Bool {
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if lhs.count != rhs.count {
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return false
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}
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for i in 0 ..< lhs.count {
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if lhs[i].0 != rhs[i].0 || lhs[i].1.peerId != rhs[i].1.peerId {
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return false
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}
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}
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return true
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}
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public final class ChatTextInputTextUrlAttribute: NSObject {
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public let url: String
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public init(url: String) {
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self.url = url
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super.init()
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}
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override public func isEqual(_ object: Any?) -> Bool {
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if let other = object as? ChatTextInputTextUrlAttribute {
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return self.url == other.url
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} else {
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return false
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}
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}
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}
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private func textUrlRangesEqual(_ lhs: [(NSRange, ChatTextInputTextUrlAttribute)], _ rhs: [(NSRange, ChatTextInputTextUrlAttribute)]) -> Bool {
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if lhs.count != rhs.count {
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return false
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}
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for i in 0 ..< lhs.count {
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if lhs[i].0 != rhs[i].0 || lhs[i].1.url != rhs[i].1.url {
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return false
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}
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}
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return true
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}
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private func refreshTextMentions(text: NSString, initialAttributedText: NSAttributedString, attributedText: NSMutableAttributedString, fullRange: NSRange) {
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var textMentionRanges: [(NSRange, ChatTextInputTextMentionAttribute)] = []
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initialAttributedText.enumerateAttribute(ChatTextInputAttributes.textMention, in: fullRange, options: [], using: { value, range, _ in
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if let value = value as? ChatTextInputTextMentionAttribute {
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textMentionRanges.append((range, value))
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}
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})
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textMentionRanges.sort(by: { $0.0.location < $1.0.location })
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let initialTextMentionRanges = textMentionRanges
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for i in 0 ..< textMentionRanges.count {
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let range = textMentionRanges[i].0
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var validLower = range.lowerBound
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inner1: for i in range.lowerBound ..< range.upperBound {
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if let c = UnicodeScalar(text.character(at: i)) {
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if alphanumericCharacters.contains(c) || c == " " as UnicodeScalar {
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validLower = i
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break inner1
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}
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} else {
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break inner1
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}
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}
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var validUpper = range.upperBound
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inner2: for i in (validLower ..< range.upperBound).reversed() {
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if let c = UnicodeScalar(text.character(at: i)) {
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if alphanumericCharacters.contains(c) || c == " " as UnicodeScalar {
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validUpper = i + 1
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break inner2
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}
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} else {
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break inner2
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}
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}
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let minLower = (i == 0) ? fullRange.lowerBound : textMentionRanges[i - 1].0.upperBound
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inner3: for i in (minLower ..< validLower).reversed() {
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if let c = UnicodeScalar(text.character(at: i)) {
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if alphanumericCharacters.contains(c) {
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validLower = i
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} else {
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break inner3
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}
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} else {
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break inner3
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}
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}
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let maxUpper = (i == textMentionRanges.count - 1) ? fullRange.upperBound : textMentionRanges[i + 1].0.lowerBound
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inner3: for i in validUpper ..< maxUpper {
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if let c = UnicodeScalar(text.character(at: i)) {
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if alphanumericCharacters.contains(c) {
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validUpper = i + 1
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} else {
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break inner3
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}
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} else {
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break inner3
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}
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}
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textMentionRanges[i] = (NSRange(location: validLower, length: validUpper - validLower), textMentionRanges[i].1)
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}
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textMentionRanges = textMentionRanges.filter({ $0.0.length > 0 })
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while textMentionRanges.count > 1 {
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var hadReductions = false
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outer: for i in 0 ..< textMentionRanges.count - 1 {
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if textMentionRanges[i].1 === textMentionRanges[i + 1].1 {
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var combine = true
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inner: for j in textMentionRanges[i].0.upperBound ..< textMentionRanges[i + 1].0.lowerBound {
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if let c = UnicodeScalar(text.character(at: j)) {
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if alphanumericCharacters.contains(c) || c == " " as UnicodeScalar {
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} else {
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combine = false
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break inner
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}
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} else {
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combine = false
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break inner
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}
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}
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if combine {
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hadReductions = true
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textMentionRanges[i] = (NSRange(location: textMentionRanges[i].0.lowerBound, length: textMentionRanges[i + 1].0.upperBound - textMentionRanges[i].0.lowerBound), textMentionRanges[i].1)
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textMentionRanges.remove(at: i + 1)
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break outer
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}
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}
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}
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if !hadReductions {
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break
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}
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}
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if textMentionRanges.count > 1 {
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outer: for i in (1 ..< textMentionRanges.count).reversed() {
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for j in 0 ..< i {
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if textMentionRanges[j].1 === textMentionRanges[i].1 {
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textMentionRanges.remove(at: i)
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continue outer
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}
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}
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}
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}
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if !textMentionRangesEqual(textMentionRanges, initialTextMentionRanges) {
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attributedText.removeAttribute(ChatTextInputAttributes.textMention, range: fullRange)
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for (range, attribute) in textMentionRanges {
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attributedText.addAttribute(ChatTextInputAttributes.textMention, value: ChatTextInputTextMentionAttribute(peerId: attribute.peerId), range: range)
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}
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}
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}
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private func refreshTextUrls(text: NSString, initialAttributedText: NSAttributedString, attributedText: NSMutableAttributedString, fullRange: NSRange) {
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var textUrlRanges: [(NSRange, ChatTextInputTextUrlAttribute)] = []
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initialAttributedText.enumerateAttribute(ChatTextInputAttributes.textUrl, in: fullRange, options: [], using: { value, range, _ in
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if let value = value as? ChatTextInputTextUrlAttribute {
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textUrlRanges.append((range, value))
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}
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})
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textUrlRanges.sort(by: { $0.0.location < $1.0.location })
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let initialTextUrlRanges = textUrlRanges
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for i in 0 ..< textUrlRanges.count {
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let range = textUrlRanges[i].0
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var validLower = range.lowerBound
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inner1: for i in range.lowerBound ..< range.upperBound {
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if let c = UnicodeScalar(text.character(at: i)) {
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if alphanumericCharacters.contains(c) || c == " " as UnicodeScalar {
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validLower = i
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break inner1
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}
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} else {
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break inner1
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}
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}
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var validUpper = range.upperBound
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inner2: for i in (validLower ..< range.upperBound).reversed() {
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if let c = UnicodeScalar(text.character(at: i)) {
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if alphanumericCharacters.contains(c) || c == " " as UnicodeScalar {
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validUpper = i + 1
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break inner2
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}
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} else {
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break inner2
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}
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}
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let minLower = (i == 0) ? fullRange.lowerBound : textUrlRanges[i - 1].0.upperBound
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inner3: for i in (minLower ..< validLower).reversed() {
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if let c = UnicodeScalar(text.character(at: i)) {
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if alphanumericCharacters.contains(c) {
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validLower = i
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} else {
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break inner3
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}
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} else {
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break inner3
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}
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}
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let maxUpper = (i == textUrlRanges.count - 1) ? fullRange.upperBound : textUrlRanges[i + 1].0.lowerBound
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inner3: for i in validUpper ..< maxUpper {
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if let c = UnicodeScalar(text.character(at: i)) {
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if alphanumericCharacters.contains(c) {
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validUpper = i + 1
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} else {
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break inner3
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}
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} else {
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break inner3
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}
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}
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textUrlRanges[i] = (NSRange(location: validLower, length: validUpper - validLower), textUrlRanges[i].1)
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}
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textUrlRanges = textUrlRanges.filter({ $0.0.length > 0 })
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while textUrlRanges.count > 1 {
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var hadReductions = false
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outer: for i in 0 ..< textUrlRanges.count - 1 {
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if textUrlRanges[i].1 === textUrlRanges[i + 1].1 {
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var combine = true
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inner: for j in textUrlRanges[i].0.upperBound ..< textUrlRanges[i + 1].0.lowerBound {
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if let c = UnicodeScalar(text.character(at: j)) {
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if alphanumericCharacters.contains(c) || c == " " as UnicodeScalar {
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} else {
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combine = false
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break inner
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}
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} else {
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combine = false
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break inner
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}
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}
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if combine {
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hadReductions = true
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textUrlRanges[i] = (NSRange(location: textUrlRanges[i].0.lowerBound, length: textUrlRanges[i + 1].0.upperBound - textUrlRanges[i].0.lowerBound), textUrlRanges[i].1)
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textUrlRanges.remove(at: i + 1)
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break outer
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}
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}
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}
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if !hadReductions {
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break
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}
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}
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if textUrlRanges.count > 1 {
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outer: for i in (1 ..< textUrlRanges.count).reversed() {
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for j in 0 ..< i {
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if textUrlRanges[j].1 === textUrlRanges[i].1 {
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textUrlRanges.remove(at: i)
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continue outer
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}
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}
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}
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}
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if !textUrlRangesEqual(textUrlRanges, initialTextUrlRanges) {
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attributedText.removeAttribute(ChatTextInputAttributes.textUrl, range: fullRange)
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for (range, attribute) in textUrlRanges {
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attributedText.addAttribute(ChatTextInputAttributes.textUrl, value: ChatTextInputTextUrlAttribute(url: attribute.url), range: range)
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}
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}
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}
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public func refreshChatTextInputAttributes(_ textNode: ASEditableTextNode, theme: PresentationTheme, baseFontSize: CGFloat) {
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guard let initialAttributedText = textNode.attributedText, initialAttributedText.length != 0 else {
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return
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}
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var text: NSString = initialAttributedText.string as NSString
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var fullRange = NSRange(location: 0, length: initialAttributedText.length)
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var attributedText = NSMutableAttributedString(attributedString: stateAttributedStringForText(initialAttributedText))
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refreshTextMentions(text: text, initialAttributedText: initialAttributedText, attributedText: attributedText, fullRange: fullRange)
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var resultAttributedText = textAttributedStringForStateText(attributedText, fontSize: baseFontSize, textColor: theme.chat.inputPanel.primaryTextColor, accentTextColor: theme.chat.inputPanel.panelControlAccentColor)
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text = resultAttributedText.string as NSString
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fullRange = NSRange(location: 0, length: initialAttributedText.length)
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attributedText = NSMutableAttributedString(attributedString: stateAttributedStringForText(resultAttributedText))
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refreshTextUrls(text: text, initialAttributedText: resultAttributedText, attributedText: attributedText, fullRange: fullRange)
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resultAttributedText = textAttributedStringForStateText(attributedText, fontSize: baseFontSize, textColor: theme.chat.inputPanel.primaryTextColor, accentTextColor: theme.chat.inputPanel.panelControlAccentColor)
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if !resultAttributedText.isEqual(to: initialAttributedText) {
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textNode.textView.textStorage.removeAttribute(NSAttributedString.Key.font, range: fullRange)
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textNode.textView.textStorage.removeAttribute(NSAttributedString.Key.foregroundColor, range: fullRange)
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textNode.textView.textStorage.removeAttribute(NSAttributedString.Key.underlineStyle, range: fullRange)
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textNode.textView.textStorage.removeAttribute(NSAttributedString.Key.strikethroughStyle, range: fullRange)
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textNode.textView.textStorage.removeAttribute(ChatTextInputAttributes.textMention, range: fullRange)
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textNode.textView.textStorage.removeAttribute(ChatTextInputAttributes.textUrl, range: fullRange)
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textNode.textView.textStorage.addAttribute(NSAttributedString.Key.font, value: Font.regular(baseFontSize), range: fullRange)
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textNode.textView.textStorage.addAttribute(NSAttributedString.Key.foregroundColor, value: theme.chat.inputPanel.primaryTextColor, range: fullRange)
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|
||||
attributedText.enumerateAttributes(in: fullRange, options: [], using: { attributes, range, _ in
|
||||
var fontAttributes: ChatTextFontAttributes = []
|
||||
|
||||
for (key, value) in attributes {
|
||||
if key == ChatTextInputAttributes.textMention || key == ChatTextInputAttributes.textUrl {
|
||||
textNode.textView.textStorage.addAttribute(key, value: value, range: range)
|
||||
textNode.textView.textStorage.addAttribute(NSAttributedString.Key.foregroundColor, value: theme.chat.inputPanel.panelControlAccentColor, range: range)
|
||||
|
||||
if theme.chat.inputPanel.panelControlAccentColor.isEqual(theme.chat.inputPanel.primaryTextColor) {
|
||||
textNode.textView.textStorage.addAttribute(NSAttributedString.Key.underlineStyle, value: NSUnderlineStyle.single.rawValue as NSNumber, range: range)
|
||||
}
|
||||
} else if key == ChatTextInputAttributes.bold {
|
||||
textNode.textView.textStorage.addAttribute(key, value: value, range: range)
|
||||
fontAttributes.insert(.bold)
|
||||
} else if key == ChatTextInputAttributes.italic {
|
||||
textNode.textView.textStorage.addAttribute(key, value: value, range: range)
|
||||
fontAttributes.insert(.italic)
|
||||
} else if key == ChatTextInputAttributes.monospace {
|
||||
textNode.textView.textStorage.addAttribute(key, value: value, range: range)
|
||||
fontAttributes.insert(.monospace)
|
||||
} else if key == ChatTextInputAttributes.strikethrough {
|
||||
textNode.textView.textStorage.addAttribute(key, value: value, range: range)
|
||||
textNode.textView.textStorage.addAttribute(NSAttributedString.Key.strikethroughStyle, value: NSUnderlineStyle.single.rawValue as NSNumber, range: range)
|
||||
} else if key == ChatTextInputAttributes.underline {
|
||||
textNode.textView.textStorage.addAttribute(key, value: value, range: range)
|
||||
textNode.textView.textStorage.addAttribute(NSAttributedString.Key.underlineStyle, value: NSUnderlineStyle.single.rawValue as NSNumber, range: range)
|
||||
}
|
||||
}
|
||||
|
||||
if !fontAttributes.isEmpty {
|
||||
var font: UIFont?
|
||||
if fontAttributes == [.bold, .italic, .monospace] {
|
||||
font = Font.semiboldItalicMonospace(baseFontSize)
|
||||
} else if fontAttributes == [.bold, .italic] {
|
||||
font = Font.semiboldItalic(baseFontSize)
|
||||
} else if fontAttributes == [.bold, .monospace] {
|
||||
font = Font.semiboldMonospace(baseFontSize)
|
||||
} else if fontAttributes == [.italic, .monospace] {
|
||||
font = Font.italicMonospace(baseFontSize)
|
||||
} else if fontAttributes == [.bold] {
|
||||
font = Font.semibold(baseFontSize)
|
||||
} else if fontAttributes == [.italic] {
|
||||
font = Font.italic(baseFontSize)
|
||||
} else if fontAttributes == [.monospace] {
|
||||
font = Font.monospace(baseFontSize)
|
||||
}
|
||||
|
||||
if let font = font {
|
||||
textNode.textView.textStorage.addAttribute(NSAttributedString.Key.font, value: font, range: range)
|
||||
}
|
||||
}
|
||||
})
|
||||
}
|
||||
}
|
||||
|
||||
public func refreshChatTextInputTypingAttributes(_ textNode: ASEditableTextNode, theme: PresentationTheme, baseFontSize: CGFloat) {
|
||||
var filteredAttributes: [NSAttributedString.Key: Any] = [
|
||||
NSAttributedString.Key.font: Font.regular(baseFontSize),
|
||||
NSAttributedString.Key.foregroundColor: theme.chat.inputPanel.primaryTextColor
|
||||
]
|
||||
if let attributedText = textNode.attributedText, attributedText.length != 0 {
|
||||
let attributes = attributedText.attributes(at: max(0, min(textNode.selectedRange.location - 1, attributedText.length - 1)), effectiveRange: nil)
|
||||
for (key, value) in attributes {
|
||||
if key == ChatTextInputAttributes.bold {
|
||||
filteredAttributes[key] = value
|
||||
} else if key == ChatTextInputAttributes.italic {
|
||||
filteredAttributes[key] = value
|
||||
} else if key == ChatTextInputAttributes.monospace {
|
||||
filteredAttributes[key] = value
|
||||
} else if key == NSAttributedString.Key.font {
|
||||
filteredAttributes[key] = value
|
||||
}
|
||||
}
|
||||
}
|
||||
textNode.textView.typingAttributes = filteredAttributes
|
||||
}
|
||||
|
||||
private func trimRangesForChatInputText(_ text: NSAttributedString) -> (Int, Int) {
|
||||
var lower = 0
|
||||
var upper = 0
|
||||
|
||||
let nsString: NSString = text.string as NSString
|
||||
|
||||
for i in 0 ..< nsString.length {
|
||||
if let c = UnicodeScalar(nsString.character(at: i)) {
|
||||
if c == " " as UnicodeScalar || c == "\t" as UnicodeScalar || c == "\n" as UnicodeScalar {
|
||||
lower += 1
|
||||
} else {
|
||||
break
|
||||
}
|
||||
} else {
|
||||
break
|
||||
}
|
||||
}
|
||||
|
||||
if lower != nsString.length {
|
||||
for i in (lower ..< nsString.length).reversed() {
|
||||
if let c = UnicodeScalar(nsString.character(at: i)) {
|
||||
if c == " " as UnicodeScalar || c == "\t" as UnicodeScalar || c == "\n" as UnicodeScalar {
|
||||
upper += 1
|
||||
} else {
|
||||
break
|
||||
}
|
||||
} else {
|
||||
break
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
return (lower, upper)
|
||||
}
|
||||
|
||||
public func trimChatInputText(_ text: NSAttributedString) -> NSAttributedString {
|
||||
let (lower, upper) = trimRangesForChatInputText(text)
|
||||
if lower == 0 && upper == 0 {
|
||||
return text
|
||||
}
|
||||
|
||||
let result = NSMutableAttributedString(attributedString: text)
|
||||
if upper != 0 {
|
||||
result.replaceCharacters(in: NSRange(location: result.length - upper, length: upper), with: "")
|
||||
}
|
||||
if lower != 0 {
|
||||
result.replaceCharacters(in: NSRange(location: 0, length: lower), with: "")
|
||||
}
|
||||
return result
|
||||
}
|
||||
|
||||
public func breakChatInputText(_ text: NSAttributedString) -> [NSAttributedString] {
|
||||
if text.length <= 4000 {
|
||||
return [text]
|
||||
} else {
|
||||
let rawText: NSString = text.string as NSString
|
||||
var result: [NSAttributedString] = []
|
||||
var offset = 0
|
||||
while offset < text.length {
|
||||
var range = NSRange(location: offset, length: min(text.length - offset, 4000))
|
||||
if range.upperBound < text.length {
|
||||
inner: for i in (range.lowerBound ..< range.upperBound).reversed() {
|
||||
let c = rawText.character(at: i)
|
||||
let uc = UnicodeScalar(c)
|
||||
if uc == "\n" as UnicodeScalar || uc == "." as UnicodeScalar {
|
||||
range.length = i + 1 - range.location
|
||||
break inner
|
||||
}
|
||||
}
|
||||
}
|
||||
result.append(trimChatInputText(text.attributedSubstring(from: range)))
|
||||
offset = range.upperBound
|
||||
}
|
||||
return result
|
||||
}
|
||||
}
|
||||
|
||||
private let markdownRegexFormat = "(^|\\s|\\n)(````?)([\\s\\S]+?)(````?)([\\s\\n\\.,:?!;]|$)|(^|\\s)(`|\\*\\*|__|~~)([^\\n]+?)\\7([\\s\\.,:?!;]|$)|@(\\d+)\\s*\\((.+?)\\)"
|
||||
private let markdownRegex = try? NSRegularExpression(pattern: markdownRegexFormat, options: [.caseInsensitive, .anchorsMatchLines])
|
||||
|
||||
public func convertMarkdownToAttributes(_ text: NSAttributedString) -> NSAttributedString {
|
||||
var string = text.string as NSString
|
||||
|
||||
var offsetRanges:[(NSRange, Int)] = []
|
||||
if let regex = markdownRegex {
|
||||
var stringOffset = 0
|
||||
let result = NSMutableAttributedString()
|
||||
|
||||
while let match = regex.firstMatch(in: string as String, range: NSMakeRange(0, string.length)) {
|
||||
let matchIndex = stringOffset + match.range.location
|
||||
|
||||
result.append(text.attributedSubstring(from: NSMakeRange(text.length - string.length, match.range.location)))
|
||||
|
||||
var pre = match.range(at: 3)
|
||||
if pre.location != NSNotFound {
|
||||
let text = string.substring(with: pre)
|
||||
|
||||
stringOffset -= match.range(at: 2).length + match.range(at: 4).length
|
||||
|
||||
let substring = string.substring(with: match.range(at: 1)) + text + string.substring(with: match.range(at: 5))
|
||||
result.append(NSAttributedString(string: substring, attributes: [ChatTextInputAttributes.monospace: true as NSNumber]))
|
||||
offsetRanges.append((NSMakeRange(matchIndex + match.range(at: 1).length, text.count), 6))
|
||||
}
|
||||
|
||||
pre = match.range(at: 8)
|
||||
if pre.location != NSNotFound {
|
||||
let text = string.substring(with: pre)
|
||||
|
||||
let entity = string.substring(with: match.range(at: 7))
|
||||
let substring = string.substring(with: match.range(at: 6)) + text + string.substring(with: match.range(at: 9))
|
||||
|
||||
switch entity {
|
||||
case "`":
|
||||
result.append(NSAttributedString(string: substring, attributes: [ChatTextInputAttributes.monospace: true as NSNumber]))
|
||||
offsetRanges.append((NSMakeRange(matchIndex + match.range(at: 6).length, text.count), match.range(at: 6).length * 2))
|
||||
case "**":
|
||||
result.append(NSAttributedString(string: substring, attributes: [ChatTextInputAttributes.bold: true as NSNumber]))
|
||||
offsetRanges.append((NSMakeRange(matchIndex + match.range(at: 6).length, text.count), match.range(at: 6).length * 2))
|
||||
case "__":
|
||||
result.append(NSAttributedString(string: substring, attributes: [ChatTextInputAttributes.italic: true as NSNumber]))
|
||||
offsetRanges.append((NSMakeRange(matchIndex + match.range(at: 6).length, text.count), match.range(at: 6).length * 2))
|
||||
case "~~":
|
||||
result.append(NSAttributedString(string: substring, attributes: [ChatTextInputAttributes.strikethrough: true as NSNumber]))
|
||||
offsetRanges.append((NSMakeRange(matchIndex + match.range(at: 6).length, text.count), match.range(at: 6).length * 2))
|
||||
default:
|
||||
break
|
||||
}
|
||||
|
||||
stringOffset -= match.range(at: 7).length * 2
|
||||
}
|
||||
|
||||
string = string.substring(from: match.range.location + match.range(at: 0).length) as NSString
|
||||
stringOffset += match.range.location + match.range(at: 0).length
|
||||
}
|
||||
|
||||
if string.length > 0 {
|
||||
result.append(text.attributedSubstring(from: NSMakeRange(text.length - string.length, string.length)))
|
||||
}
|
||||
|
||||
return result
|
||||
}
|
||||
|
||||
return text
|
||||
}
|
||||
Reference in New Issue
Block a user