Tusker/Packages/ComposeUI/Sources/ComposeUI/Views/EmojiTextField.swift

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//
// EmojiTextField.swift
// ComposeUI
//
// Created by Shadowfacts on 3/5/23.
//
import SwiftUI
struct EmojiTextField: UIViewRepresentable {
typealias UIViewType = UITextField
@EnvironmentObject private var controller: ComposeController
@Environment(\.colorScheme) private var colorScheme
@Binding var text: String
let placeholder: String
let maxLength: Int?
let becomeFirstResponder: Binding<Bool>?
let focusNextView: Binding<Bool>?
init(text: Binding<String>, placeholder: String, maxLength: Int?, becomeFirstResponder: Binding<Bool>? = nil, focusNextView: Binding<Bool>? = nil) {
self._text = text
self.placeholder = placeholder
self.maxLength = maxLength
self.becomeFirstResponder = becomeFirstResponder
self.focusNextView = focusNextView
}
func makeUIView(context: Context) -> UITextField {
let view = UITextField()
view.borderStyle = .roundedRect
view.font = .preferredFont(forTextStyle: .body)
view.adjustsFontForContentSizeCategory = true
view.attributedPlaceholder = NSAttributedString(string: placeholder, attributes: [
.foregroundColor: UIColor.secondaryLabel,
])
context.coordinator.textField = view
view.delegate = context.coordinator
view.addTarget(context.coordinator, action: #selector(Coordinator.didChange(_:)), for: .editingChanged)
view.addTarget(context.coordinator, action: #selector(Coordinator.returnKeyPressed), for: .primaryActionTriggered)
// otherwise when the text gets too wide it starts expanding the ComposeView
view.setContentCompressionResistancePriority(.defaultLow, for: .horizontal)
return view
}
func updateUIView(_ uiView: UITextField, context: Context) {
if text != uiView.text {
uiView.text = text
}
context.coordinator.text = $text
context.coordinator.maxLength = maxLength
context.coordinator.focusNextView = focusNextView
uiView.backgroundColor = colorScheme == .dark ? UIColor(controller.config.fillColor) : .secondarySystemBackground
if becomeFirstResponder?.wrappedValue == true {
DispatchQueue.main.async {
uiView.becomeFirstResponder()
becomeFirstResponder!.wrappedValue = false
}
}
}
func makeCoordinator() -> Coordinator {
Coordinator(controller: controller, text: $text, focusNextView: focusNextView)
}
class Coordinator: NSObject, UITextFieldDelegate, ComposeInput {
let controller: ComposeController
var text: Binding<String>
var focusNextView: Binding<Bool>?
var maxLength: Int?
@Published var autocompleteState: AutocompleteState?
var autocompleteStatePublisher: Published<AutocompleteState?>.Publisher { $autocompleteState }
weak var textField: UITextField?
init(controller: ComposeController, text: Binding<String>, focusNextView: Binding<Bool>?, maxLength: Int? = nil) {
self.controller = controller
self.text = text
self.focusNextView = focusNextView
self.maxLength = maxLength
}
@objc func didChange(_ textField: UITextField) {
text.wrappedValue = textField.text ?? ""
}
@objc func returnKeyPressed() {
focusNextView?.wrappedValue = true
}
func textField(_ textField: UITextField, shouldChangeCharactersIn range: NSRange, replacementString string: String) -> Bool {
if let maxLength {
return ((textField.text ?? "") as NSString).replacingCharacters(in: range, with: string).count <= maxLength
} else {
return true
}
}
func textFieldDidBeginEditing(_ textField: UITextField) {
controller.currentInput = self
autocompleteState = textField.updateAutocompleteState(permittedModes: .emojis)
}
func textFieldDidEndEditing(_ textField: UITextField) {
controller.currentInput = nil
autocompleteState = textField.updateAutocompleteState(permittedModes: .emojis)
}
func textFieldDidChangeSelection(_ textField: UITextField) {
autocompleteState = textField.updateAutocompleteState(permittedModes: .emojis)
}
// MARK: ComposeInput
var toolbarElements: [ToolbarElement] { [.emojiPicker] }
func applyFormat(_ format: StatusFormat) {
}
func beginAutocompletingEmoji() {
textField?.insertText(":")
}
func autocomplete(with string: String) {
textField?.autocomplete(with: string, permittedModes: .emojis, autocompleteState: &autocompleteState)
}
}
}