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