104 lines
3.7 KiB
Swift
104 lines
3.7 KiB
Swift
//
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// AccountDisplayNameLabel.swift
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// Tusker
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//
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// Created by Shadowfacts on 9/7/20.
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// Copyright © 2020 Shadowfacts. All rights reserved.
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//
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import SwiftUI
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import Pachyderm
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private let emojiRegex = try! NSRegularExpression(pattern: ":(\\w+):", options: [])
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struct AccountDisplayNameLabel<Account: AccountProtocol>: View {
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let account: Account
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let fontSize: Int
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@State var text: Text
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@State var emojiRequests = [ImageCache.Request]()
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init(account: Account, fontSize: Int) {
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self.account = account
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self.fontSize = fontSize
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self._text = State(initialValue: Text(verbatim: account.displayName))
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}
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var body: some View {
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text
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.font(.system(size: CGFloat(fontSize), weight: .semibold))
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.onAppear(perform: self.loadEmojis)
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}
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private func loadEmojis() {
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let fullRange = NSRange(account.displayName.startIndex..., in: account.displayName)
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let matches = emojiRegex.matches(in: account.displayName, options: [], range: fullRange)
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guard !matches.isEmpty else { return }
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let emojiImages = MultiThreadDictionary<String, Image>(name: "AcccountDisplayNameLabel Emoji Images")
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let group = DispatchGroup()
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for emoji in account.emojis {
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guard matches.contains(where: { (match) in
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let matchShortcode = (account.displayName as NSString).substring(with: match.range(at: 1))
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return emoji.shortcode == matchShortcode
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}) else {
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continue
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}
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group.enter()
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let request = ImageCache.emojis.get(emoji.url) { (_, image) in
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defer { group.leave() }
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guard let image = image else { return }
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let size = CGSize(width: fontSize, height: fontSize)
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let renderer = UIGraphicsImageRenderer(size: size)
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let resized = renderer.image { (ctx) in
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image.draw(in: CGRect(origin: .zero, size: size))
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}
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emojiImages[emoji.shortcode] = Image(uiImage: resized)
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}
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if let request = request {
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emojiRequests.append(request)
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}
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}
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group.notify(queue: .main) {
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var text: Text?
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var endIndex = account.displayName.utf16.count
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// iterate backwards as to not alter the indices of earlier matches
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for match in matches.reversed() {
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let shortcode = (account.displayName as NSString).substring(with: match.range(at: 1))
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guard let image = emojiImages[shortcode] else { continue }
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let afterCurrentMatch = (account.displayName as NSString).substring(with: NSRange(location: match.range.upperBound, length: endIndex - match.range.upperBound))
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if let subsequent = text {
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text = Text(image) + Text(verbatim: afterCurrentMatch) + subsequent
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} else {
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text = Text(image) + Text(verbatim: afterCurrentMatch)
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}
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endIndex = match.range.lowerBound
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}
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let beforeLastMatch = (account.displayName as NSString).substring(to: endIndex)
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if let text = text {
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self.text = Text(verbatim: beforeLastMatch) + text
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} else {
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self.text = Text(verbatim: beforeLastMatch)
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}
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}
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}
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}
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//struct AccountDisplayNameLabel_Previews: PreviewProvider {
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// static var previews: some View {
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// AccountDisplayNameLabel()
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// }
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//}
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