metatext-app-ios-iphone-ipad/Extensions/NSMutableAttributedString+E...

58 lines
2.0 KiB
Swift

// Copyright © 2020 Metabolist. All rights reserved.
import Mastodon
import SDWebImage
import UIKit
import ViewModels
extension NSMutableAttributedString {
func insert(emojis: [Emoji], view: UIView & EmojiInsertable, identityContext: IdentityContext) {
for emoji in emojis {
let token = ":\(emoji.shortcode):"
while let tokenRange = string.range(of: token) {
let attachment = AnimatedTextAttachment()
let imageURL: URL?
if !identityContext.appPreferences.shouldReduceMotion,
identityContext.appPreferences.animateCustomEmojis,
let urlString = emoji.url {
imageURL = URL(stringEscapingPath: urlString)
} else if let staticURLString = emoji.staticUrl {
imageURL = URL(stringEscapingPath: staticURLString)
} else {
imageURL = nil
}
attachment.imageView.sd_setImage(with: imageURL) { image, _, _, _ in
attachment.image = image
DispatchQueue.main.async {
view.setNeedsDisplay()
}
}
attachment.accessibilityLabel = emoji.shortcode
replaceCharacters(in: NSRange(tokenRange, in: string), with: NSAttributedString(attachment: attachment))
}
}
}
func resizeAttachments(toLineHeight lineHeight: CGFloat) {
enumerateAttribute(.attachment, in: NSRange(location: 0, length: length), options: []) { attribute, _, _ in
guard let attachment = attribute as? NSTextAttachment else { return }
attachment.bounds = CGRect(x: 0, y: lineHeight * -0.25, width: lineHeight, height: lineHeight)
}
}
func appendWithSeparator(_ string: NSAttributedString) {
append(.init(string: .separator))
append(string)
}
func appendWithSeparator(_ string: String) {
appendWithSeparator(.init(string: string))
}
}