mirror of
https://github.com/vector-im/element-ios.git
synced 2024-10-02 01:02:41 +00:00
30ff8a65fb
- added input toolbar poll creation action. - reordered input toolbar actions as per designs. - added multiline text field and extracted common components.
207 lines
6.3 KiB
Swift
207 lines
6.3 KiB
Swift
//
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// Copyright 2021 New Vector Ltd
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//
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import SwiftUI
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@available(iOS 14.0, *)
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struct MultilineTextField: View {
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@Environment(\.theme) private var theme: ThemeSwiftUI
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@Binding private var text: String
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@State private var dynamicHeight: CGFloat = 100
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@State private var isEditing = false
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private var placeholder: String = ""
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private var showingPlaceholder: Bool {
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text.isEmpty
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}
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init(_ placeholder: String, text: Binding<String>) {
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self.placeholder = placeholder
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self._text = text
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}
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private var textColor: Color {
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if (theme.identifier == ThemeIdentifier.dark) {
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return theme.colors.primaryContent
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} else {
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return theme.colors.primaryContent
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}
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}
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private var backgroundColor: Color {
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return theme.colors.background
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}
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private var placeholderColor: Color {
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return theme.colors.tertiaryContent
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}
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private var borderColor: Color {
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if isEditing {
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return theme.colors.accent
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}
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return theme.colors.quarterlyContent
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}
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private var borderWidth: CGFloat {
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return isEditing ? 2.0 : 1.5
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}
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var body: some View {
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let rect = RoundedRectangle(cornerRadius: 8.0)
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return UITextViewWrapper(text: $text, calculatedHeight: $dynamicHeight, isEditing: $isEditing)
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.frame(minHeight: dynamicHeight, maxHeight: dynamicHeight)
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.padding(4.0)
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.background(placeholderView, alignment: .topLeading)
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.animation(.none)
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.background(backgroundColor)
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.clipShape(rect)
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.overlay(rect.stroke(borderColor, lineWidth: borderWidth))
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.introspectTextView { textView in
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textView.textColor = UIColor(textColor)
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textView.font = theme.fonts.uiFonts.callout
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}
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}
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@ViewBuilder
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private var placeholderView: some View {
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if showingPlaceholder {
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Text(placeholder)
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.foregroundColor(placeholderColor)
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.font(theme.fonts.callout)
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.padding(.leading, 8.0)
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.padding(.top, 12.0)
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}
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}
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}
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@available(iOS 14.0, *)
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fileprivate struct UITextViewWrapper: UIViewRepresentable {
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typealias UIViewType = UITextView
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@Binding var text: String
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@Binding var calculatedHeight: CGFloat
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@Binding var isEditing: Bool
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func makeUIView(context: UIViewRepresentableContext<UITextViewWrapper>) -> UITextView {
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let textView = UITextView()
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textView.delegate = context.coordinator
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textView.isEditable = true
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textView.font = UIFont.preferredFont(forTextStyle: .body)
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textView.isSelectable = true
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textView.isUserInteractionEnabled = true
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textView.isScrollEnabled = false
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textView.backgroundColor = UIColor.clear
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textView.returnKeyType = .done
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textView.setContentCompressionResistancePriority(.defaultLow, for: .horizontal)
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return textView
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}
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func updateUIView(_ uiView: UITextView, context: UIViewRepresentableContext<UITextViewWrapper>) {
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if uiView.text != self.text {
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uiView.text = self.text
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}
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UITextViewWrapper.recalculateHeight(view: uiView, result: $calculatedHeight)
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}
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fileprivate static func recalculateHeight(view: UIView, result: Binding<CGFloat>) {
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let newSize = view.sizeThatFits(CGSize(width: view.frame.size.width, height: CGFloat.greatestFiniteMagnitude))
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if result.wrappedValue != newSize.height {
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DispatchQueue.main.async {
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result.wrappedValue = newSize.height // !! must be called asynchronously
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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(text: $text, height: $calculatedHeight, isEditing: $isEditing)
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}
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final class Coordinator: NSObject, UITextViewDelegate {
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var text: Binding<String>
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var calculatedHeight: Binding<CGFloat>
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var isEditing: Binding<Bool>
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init(text: Binding<String>, height: Binding<CGFloat>, isEditing: Binding<Bool>) {
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self.text = text
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self.calculatedHeight = height
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self.isEditing = isEditing
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}
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func textViewDidChange(_ uiView: UITextView) {
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text.wrappedValue = uiView.text
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UITextViewWrapper.recalculateHeight(view: uiView, result: calculatedHeight)
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}
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func textView(_ textView: UITextView, shouldChangeTextIn range: NSRange, replacementText text: String) -> Bool {
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if text == "\n" {
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textView.resignFirstResponder()
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return false
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}
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return true
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}
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func textViewDidBeginEditing(_ textView: UITextView) {
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isEditing.wrappedValue = true
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}
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func textViewDidEndEditing(_ textView: UITextView) {
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isEditing.wrappedValue = false
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}
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}
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}
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@available(iOS 14.0, *)
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struct MultilineTextField_Previews: PreviewProvider {
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static var previews: some View {
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return Group {
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VStack {
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PreviewWrapper()
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PlaceholderPreviewWrapper()
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PreviewWrapper()
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.theme(ThemeIdentifier.dark)
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PlaceholderPreviewWrapper()
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.theme(ThemeIdentifier.dark)
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}
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}
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.padding()
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}
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struct PreviewWrapper: View {
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@State(initialValue: "123") var text: String
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var body: some View {
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MultilineTextField("Placeholder", text: $text)
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}
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}
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struct PlaceholderPreviewWrapper: View {
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@State(initialValue: "") var text: String
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var body: some View {
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MultilineTextField("Placeholder", text: $text)
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}
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}
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}
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