97 lines
2.8 KiB
Swift
97 lines
2.8 KiB
Swift
//
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// HomepagePrefView.swift
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// Gemini-iOS
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//
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// Created by Shadowfacts on 6/15/21.
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//
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import SwiftUI
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struct HomepagePrefView: View {
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@State private var url: URL? = Preferences.shared.homepage
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@State private var focus = false
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var body: some View {
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List {
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// use a custom binding to allow the state variable to be nil temporarily, and update the pref when not
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HomepagePrefTextField(value: Binding(get: {
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url
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}, set: { (newVal) in
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self.url = newVal
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if let newVal = newVal {
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Preferences.shared.homepage = newVal
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}
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}), focus: $focus)
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}
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.navigationBarTitle("Homepage")
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.onAppear {
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focus = true
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}
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.onDisappear {
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// if the text field was empty when we disappeared, reset to the default homepage
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if url == nil {
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Preferences.shared.homepage = AppDelegate.defaultHomepage
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}
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} }
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}
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struct HomepagePrefTextField: UIViewRepresentable {
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@Binding private var value: URL?
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@Binding private var focus: Bool
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init(value: Binding<URL?>, focus: Binding<Bool>) {
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self._value = value
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self._focus = focus
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}
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func makeUIView(context: Context) -> UITextField {
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let field = UITextField()
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field.addTarget(context.coordinator, action: #selector(Coordinator.textChanged), for: .editingChanged)
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field.clearButtonMode = .whileEditing
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field.placeholder = AppDelegate.defaultHomepage.absoluteString
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// fix for text field expanding horizontally when text grows
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field.setContentCompressionResistancePriority(.defaultLow, for: .horizontal)
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return field
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}
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func updateUIView(_ uiView: UITextField, context: Context) {
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uiView.text = value?.absoluteString
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context.coordinator.binding = $value
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if focus {
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DispatchQueue.main.async {
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uiView.becomeFirstResponder()
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focus = false
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}
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}
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}
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func makeCoordinator() -> Coordinator {
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return Coordinator(binding: $value)
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}
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class Coordinator: NSObject {
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var binding: Binding<URL?>
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init(binding: Binding<URL?>) {
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self.binding = binding
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}
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@objc func textChanged(_ textField: UITextField) {
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if let text = textField.text,
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!text.isEmpty {
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if let url = URL(string: text) {
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binding.wrappedValue = url
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}
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} else {
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binding.wrappedValue = nil
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}
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}
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}
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}
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struct HomepagePrefView_Previews: PreviewProvider {
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static var previews: some View {
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HomepagePrefView()
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}
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}
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