914 lines
32 KiB
Swift
914 lines
32 KiB
Swift
import SwiftUI
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#if canImport(UIKit)
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import UIKit
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#endif
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struct PrivateChatView: View {
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let chat: PrivateChatListItem
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let currentUserId: String?
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private let bottomAnchorId = "PrivateChatBottomAnchor"
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private let headerAvatarSize: CGFloat = 36
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let lineLimitInChat = 6
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@StateObject private var viewModel: PrivateChatViewModel
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@State private var hasPositionedToBottom: Bool = false
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@State private var scrollToBottomTrigger: UUID = .init()
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@State private var isBottomAnchorVisible: Bool = true
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@State private var draftText: String = ""
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@State private var inputTab: ComposerTab = .chat
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@State private var isVideoPreferred: Bool = false
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@State private var legacyComposerHeight: CGFloat = 40
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@State private var isProfilePresented: Bool = false
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@FocusState private var isComposerFocused: Bool
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@EnvironmentObject private var messageCenter: IncomingMessageCenter
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@Environment(\.dismiss) private var dismiss
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init(chat: PrivateChatListItem, currentUserId: String?) {
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self.chat = chat
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self.currentUserId = currentUserId
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_viewModel = StateObject(wrappedValue: PrivateChatViewModel(chatId: chat.chatId, currentUserId: currentUserId))
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}
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var body: some View {
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ZStack {
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ScrollViewReader { proxy in
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ZStack(alignment: .bottomTrailing) {
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content
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.onChange(of: viewModel.messages.count) { _ in
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if isBottomAnchorVisible {
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scrollToBottom(proxy: proxy)
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}
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}
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.onChange(of: scrollToBottomTrigger) { _ in
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scrollToBottom(proxy: proxy)
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}
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if !isBottomAnchorVisible && !viewModel.isInitialLoading {
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scrollToBottomButton(proxy: proxy)
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.padding(.trailing, 12)
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.padding(.bottom, 4)
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}
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}
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}
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NavigationLink(
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destination: MessageProfileView(chat: chat, currentUserId: currentUserId),
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isActive: $isProfilePresented
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) {
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EmptyView()
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}
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.hidden()
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}
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.navigationTitle(toolbarTitle)
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.navigationBarTitleDisplayMode(.inline)
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// .navigationBarBackButtonHidden(true)
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// .toolbar {
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// ToolbarItem(placement: .principal) {
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// chatToolbarContent
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// }
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// }
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.toolbar {
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// ToolbarItem(placement: .navigationBarLeading) {
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// Button(action: { dismiss() }) {
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// Image(systemName: "chevron.left")
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// .font(.system(size: 17, weight: .semibold))
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// .foregroundColor(.accentColor)
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// }
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// }
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ToolbarItem(placement: .principal) {
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Button(action: openProfile) {
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nameStatusView
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}
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.buttonStyle(.plain)
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}
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ToolbarItem(placement: .navigationBarTrailing) {
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avatarButton
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}
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}
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.task {
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viewModel.loadInitialHistory()
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}
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.onAppear {
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messageCenter.activeChatId = chat.chatId
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}
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.onChange(of: viewModel.isInitialLoading) { isLoading in
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if isLoading {
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hasPositionedToBottom = false
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} else if !viewModel.messages.isEmpty {
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scrollToBottomTrigger = .init()
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}
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}
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.safeAreaInset(edge: .bottom) {
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composer
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}
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.onDisappear {
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if messageCenter.activeChatId == chat.chatId {
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messageCenter.activeChatId = nil
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}
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}
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}
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@ViewBuilder
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private var content: some View {
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if viewModel.isInitialLoading && viewModel.messages.isEmpty {
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ProgressView(NSLocalizedString("Загрузка сообщений…", comment: ""))
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.frame(maxWidth: .infinity, maxHeight: .infinity)
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} else if let error = viewModel.errorMessage, viewModel.messages.isEmpty {
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errorView(message: error)
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} else {
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messagesList
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}
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}
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private var messagesList: some View {
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ScrollView {
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LazyVStack(alignment: .leading, spacing: 12) {
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Color.clear
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.frame(height: 1)
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.id(bottomAnchorId)
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.onAppear { isBottomAnchorVisible = true }
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.onDisappear { isBottomAnchorVisible = false }
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if let message = viewModel.errorMessage,
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!message.isEmpty,
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!viewModel.messages.isEmpty {
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errorBanner(message: message)
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.scaleEffect(x: 1, y: -1, anchor: .center)
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}
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ForEach(viewModel.messages.reversed()) { message in
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messageRow(for: message)
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.id(message.id)
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.scaleEffect(x: 1, y: -1, anchor: .center)
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.onAppear {
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guard hasPositionedToBottom else { return }
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viewModel.loadMoreIfNeeded(for: message)
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}
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}
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if viewModel.isLoadingMore {
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loadingMoreView
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.scaleEffect(x: 1, y: -1, anchor: .center)
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} else if !viewModel.hasMore && !viewModel.messages.isEmpty {
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noMoreMessagesView
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.scaleEffect(x: 1, y: -1, anchor: .center)
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} else if viewModel.messages.isEmpty {
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emptyState
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.scaleEffect(x: 1, y: -1, anchor: .center)
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}
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}
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.padding(.vertical, 12)
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}
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.scaleEffect(x: 1, y: -1, anchor: .center)
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.simultaneousGesture(
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DragGesture().onChanged { value in
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guard value.translation.height > 0 else { return }
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isComposerFocused = false
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}
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)
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}
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private var emptyState: some View {
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Text(NSLocalizedString("В чате пока нет сообщений.", comment: ""))
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.font(.footnote)
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.foregroundColor(.secondary)
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.frame(maxWidth: .infinity, alignment: .center)
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.padding(.top, 32)
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}
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private var loadingMoreView: some View {
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HStack {
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ProgressView()
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Text(NSLocalizedString("Загружаем ранние сообщения…", comment: ""))
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.font(.caption)
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}
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.frame(maxWidth: .infinity)
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.padding(.vertical, 8)
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}
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private var noMoreMessagesView: some View {
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Text(NSLocalizedString("Больше сообщений нет", comment: "Chat history top reached"))
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.font(.caption)
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.foregroundColor(.secondary)
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.padding(.vertical, 16)
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.frame(maxWidth: .infinity)
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}
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private func errorView(message: String) -> some View {
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VStack(spacing: 12) {
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Text(message)
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.font(.body)
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.multilineTextAlignment(.center)
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.foregroundColor(.primary)
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Button(action: { viewModel.refresh() }) {
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Text(NSLocalizedString("Повторить", comment: ""))
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.font(.body)
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}
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}
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.padding()
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.frame(maxWidth: .infinity, maxHeight: .infinity)
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}
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private func messageRow(for message: MessageItem) -> some View {
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let isCurrentUser = currentUserId.map { $0 == message.senderId } ?? false
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return HStack(alignment: .bottom, spacing: 12) {
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if isCurrentUser { Spacer(minLength: 32) }
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messageBubble(for: message, isCurrentUser: isCurrentUser)
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if !isCurrentUser { Spacer(minLength: 32) }
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}
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.padding(.horizontal, 16)
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}
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private func messageBubble(for message: MessageItem, isCurrentUser: Bool) -> some View {
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let timeText = timestamp(for: message)
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return VStack(alignment: isCurrentUser ? .trailing : .leading, spacing: 4) {
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Text(contentText(for: message))
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.font(.body)
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.foregroundColor(isCurrentUser ? .white : .primary)
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.multilineTextAlignment(.leading)
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if !timeText.isEmpty {
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Text(timeText)
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.font(.caption2)
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.foregroundColor(isCurrentUser ? Color.white.opacity(0.85) : .secondary)
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}
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}
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.padding(.vertical, 10)
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.padding(.horizontal, 12)
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.background(isCurrentUser ? Color.accentColor : Color(.secondarySystemBackground))
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.clipShape(RoundedRectangle(cornerRadius: 16, style: .continuous))
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.frame(maxWidth: messageBubbleMaxWidth, alignment: isCurrentUser ? .trailing : .leading)
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.fixedSize(horizontal: false, vertical: true)
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}
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private var messageBubbleMaxWidth: CGFloat {
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min(UIScreen.main.bounds.width * 0.72, 360)
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}
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private func senderName(for message: MessageItem) -> String {
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if let full = message.senderData?.fullName, !full.trimmingCharacters(in: .whitespacesAndNewlines).isEmpty {
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return full
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}
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if let custom = message.senderData?.customName, !custom.trimmingCharacters(in: .whitespacesAndNewlines).isEmpty {
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return custom
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}
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if let login = message.senderData?.login, !login.trimmingCharacters(in: .whitespacesAndNewlines).isEmpty {
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return "@\(login)"
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}
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return message.senderId
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}
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private func timestamp(for message: MessageItem) -> String {
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guard let date = message.createdAt else {
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return ""
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}
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return Self.timeFormatter.string(from: date)
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}
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private func contentText(for message: MessageItem) -> String {
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guard let content = message.content?.trimmingCharacters(in: .whitespacesAndNewlines), !content.isEmpty else {
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return NSLocalizedString("(без текста)", comment: "")
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}
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return content
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}
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private func errorBanner(message: String) -> some View {
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HStack {
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Image(systemName: "exclamationmark.triangle.fill")
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.foregroundColor(.orange)
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Text(message)
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.font(.footnote)
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.foregroundColor(.primary)
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}
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.padding()
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.background(Color(.secondarySystemBackground))
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.clipShape(RoundedRectangle(cornerRadius: 12, style: .continuous))
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.padding(.horizontal, 16)
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.padding(.top, 8)
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}
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private var composer: some View {
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VStack(spacing: 10) {
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HStack(alignment: .bottom, spacing: 4) {
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Button(action: { }) { // переключатель на стикеры
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Image(systemName: "paperclip")
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.font(.system(size: 18, weight: .semibold))
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.foregroundColor(.secondary)
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}
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// .buttonStyle(ComposerIconButtonStyle())
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.frame(width: 36, height: 36)
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ZStack(alignment: .bottomTrailing) {
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Group {
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if #available(iOS 16.0, *) {
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TextField(inputTab.placeholder, text: $draftText, axis: .vertical)
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.lineLimit(1...lineLimitInChat)
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.focused($isComposerFocused)
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.submitLabel(.send)
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.disabled(currentUserId == nil)
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.onSubmit { sendCurrentMessage() }
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} else {
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LegacyMultilineTextView(
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text: $draftText,
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placeholder: inputTab.placeholder,
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isFocused: Binding(
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get: { isComposerFocused },
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set: { isComposerFocused = $0 }
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),
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isEnabled: currentUserId != nil,
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minHeight: 10,
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maxLines: lineLimitInChat,
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calculatedHeight: $legacyComposerHeight,
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onSubmit: sendCurrentMessage
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)
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.frame(height: legacyComposerHeight)
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}
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}
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.padding(.top, 10)
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.padding(.leading, 12)
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.padding(.trailing, 44)
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.padding(.bottom, 10)
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.frame(maxWidth: .infinity, minHeight: 40, alignment: .bottomLeading)
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Button(action: { }) { // переключатель на стикеры
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Image(systemName: "face.smiling")
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.font(.system(size: 18, weight: .semibold))
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.foregroundColor(.secondary)
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}
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.padding(.trailing, 12)
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.padding(.bottom, 10)
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}
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.frame(minHeight: 40, alignment: .bottom)
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.background(Color(.secondarySystemBackground))
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.clipShape(RoundedRectangle(cornerRadius: 18, style: .continuous))
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.alignmentGuide(.bottom) { dimension in
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dimension[VerticalAlignment.bottom] - 2
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}
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if !isSendAvailable {
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Button(action: { isVideoPreferred.toggle() }) {
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Image(systemName: isVideoPreferred ? "video.fill" : "mic.fill")
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.font(.system(size: 18, weight: .semibold))
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.foregroundColor(.secondary)
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}
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// .buttonStyle(ComposerIconButtonStyle())
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.frame(width: 36, height: 36)
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} else {
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sendButton
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}
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}
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}
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.padding(.horizontal, 6)
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.padding(.top, 10)
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.padding(.bottom, 8)
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.background(.ultraThinMaterial)
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}
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private func scrollToBottomButton(proxy: ScrollViewProxy) -> some View {
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Button {
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scrollToBottom(proxy: proxy)
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} label: {
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Image(systemName: "arrow.down")
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.font(.system(size: 18, weight: .semibold))
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.foregroundColor(.white)
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.frame(width: 44, height: 44)
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// .background(Color.accentColor)
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.background(Color(.secondarySystemBackground))
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.clipShape(Circle())
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// .overlay(
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// Circle().stroke(Color.white.opacity(0.35), lineWidth: 1)
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// )
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}
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.buttonStyle(.plain)
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.shadow(color: Color.black.opacity(0.2), radius: 4, x: 0, y: 2)
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}
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private var isSendDisabled: Bool {
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draftText.trimmingCharacters(in: .whitespacesAndNewlines).isEmpty || currentUserId == nil
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}
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private var isSendAvailable: Bool {
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!draftText.trimmingCharacters(in: .whitespacesAndNewlines).isEmpty && currentUserId != nil
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}
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private var sendButton: some View {
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Button(action: sendCurrentMessage) {
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Image(systemName: "leaf.fill")
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.font(.system(size: 16, weight: .semibold))
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.foregroundColor(Color.white.opacity(isSendDisabled ? 0.6 : 1))
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.frame(width: 36, height: 36)
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.background(isSendDisabled ? Color.accentColor.opacity(0.4) : Color.accentColor)
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.clipShape(Circle())
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}
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.disabled(isSendDisabled)
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.buttonStyle(.plain)
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}
|
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// private func composerToolbarButton(systemName: String, action: @escaping () -> Void) -> some View {
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// Button(action: action) {
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// Image(systemName: systemName)
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// .font(.system(size: 16, weight: .medium))
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// }
|
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|
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private func composerModeButton(_ tab: ComposerTab) -> some View {
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Button(action: { inputTab = tab }) {
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Text(tab.title)
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.font(.caption)
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.fontWeight(inputTab == tab ? .semibold : .regular)
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.padding(.vertical, 8)
|
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.padding(.horizontal, 14)
|
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.background(
|
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Group {
|
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if inputTab == tab {
|
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Color.accentColor.opacity(0.15)
|
||
} else {
|
||
Color(.secondarySystemBackground)
|
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}
|
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}
|
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)
|
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.foregroundColor(inputTab == tab ? .accentColor : .primary)
|
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.clipShape(Capsule())
|
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}
|
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.buttonStyle(.plain)
|
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}
|
||
|
||
private func sendCurrentMessage() {
|
||
let text = draftText.trimmingCharacters(in: .whitespacesAndNewlines)
|
||
guard !text.isEmpty else { return }
|
||
|
||
draftText = ""
|
||
scrollToBottomTrigger = .init()
|
||
viewModel.sendMessage(text: text) { success in
|
||
if success {
|
||
hasPositionedToBottom = true
|
||
}
|
||
}
|
||
}
|
||
|
||
private func scrollToBottom(proxy: ScrollViewProxy) {
|
||
hasPositionedToBottom = true
|
||
|
||
let targetId = viewModel.messages.last?.id ?? bottomAnchorId
|
||
|
||
DispatchQueue.main.async {
|
||
withAnimation(.easeInOut(duration: 0.2)) {
|
||
proxy.scrollTo(targetId, anchor: .top)
|
||
}
|
||
}
|
||
}
|
||
|
||
private struct ComposerIconButtonStyle: ButtonStyle {
|
||
func makeBody(configuration: Configuration) -> some View {
|
||
configuration.label
|
||
.frame(width: 36, height: 36)
|
||
.background(Color(.secondarySystemBackground))
|
||
.clipShape(Circle())
|
||
.overlay(
|
||
Circle().stroke(Color.secondary.opacity(0.15))
|
||
)
|
||
.scaleEffect(configuration.isPressed ? 0.94 : 1)
|
||
.opacity(configuration.isPressed ? 0.75 : 1)
|
||
}
|
||
}
|
||
|
||
private enum ComposerTab: String {
|
||
case chat
|
||
case stickers
|
||
|
||
var title: String {
|
||
switch self {
|
||
case .chat: return NSLocalizedString("Чат", comment: "")
|
||
case .stickers: return NSLocalizedString("Стикеры", comment: "")
|
||
}
|
||
}
|
||
|
||
var iconName: String {
|
||
switch self {
|
||
case .chat: return "text.bubble"
|
||
case .stickers: return "face.smiling"
|
||
}
|
||
}
|
||
|
||
var placeholder: String {
|
||
switch self {
|
||
case .chat: return NSLocalizedString("Сообщение", comment: "")
|
||
case .stickers: return NSLocalizedString("Поиск стикеров", comment: "")
|
||
}
|
||
}
|
||
}
|
||
|
||
private static let timeFormatter: DateFormatter = {
|
||
let formatter = DateFormatter()
|
||
formatter.dateStyle = .none
|
||
formatter.timeStyle = .short
|
||
return formatter
|
||
}()
|
||
|
||
private var title: String {
|
||
switch chat.chatType {
|
||
case .self:
|
||
return NSLocalizedString("Избранные сообщения", comment: "Saved messages title")
|
||
case .privateChat, .unknown:
|
||
if let custom = trimmed(chat.chatData?.customName) {
|
||
return custom
|
||
}
|
||
if let full = trimmed(chat.chatData?.fullName) {
|
||
return full
|
||
}
|
||
if let login = trimmed(chat.chatData?.login) {
|
||
return "@\(login)"
|
||
}
|
||
return NSLocalizedString("Неизвестный пользователь", comment: "Unknown chat title")
|
||
}
|
||
}
|
||
|
||
private var toolbarTitle: String {
|
||
officialDisplayName ?? title
|
||
}
|
||
|
||
private var offlineStatusText: String {
|
||
NSLocalizedString("Оффлайн", comment: "Offline status placeholder")
|
||
}
|
||
|
||
private var loginDisplay: String? {
|
||
guard let login = trimmed(chat.chatData?.login) else {
|
||
return nil
|
||
}
|
||
return "@\(login)"
|
||
}
|
||
|
||
private var isOfficial: Bool {
|
||
chat.chatData?.isOfficial ?? false
|
||
}
|
||
|
||
private var officialDisplayName: String? {
|
||
guard isOfficial else { return nil }
|
||
|
||
if let customName = trimmed(chat.chatData?.customName) {
|
||
return customName
|
||
}
|
||
|
||
if let name = trimmed(chat.chatData?.fullName) {
|
||
return NSLocalizedString(name, comment: "Official chat name")
|
||
}
|
||
|
||
return loginDisplay
|
||
}
|
||
|
||
private var isDeletedUser: Bool {
|
||
guard chat.chatType != .self else { return false }
|
||
return trimmed(chat.chatData?.login) == nil
|
||
}
|
||
|
||
private var avatarBackgroundColor: Color {
|
||
if isDeletedUser {
|
||
return Color(.systemGray5)
|
||
}
|
||
return isOfficial ? Color.accentColor.opacity(0.85) : Color.accentColor.opacity(0.15)
|
||
}
|
||
|
||
private var avatarTextColor: Color {
|
||
if isDeletedUser {
|
||
return Color.accentColor
|
||
}
|
||
return isOfficial ? Color.white : Color.accentColor
|
||
}
|
||
|
||
private var deletedUserSymbolName: String {
|
||
"person.slash"
|
||
}
|
||
|
||
private var avatarUrl: URL? {
|
||
guard let chatData = chat.chatData,
|
||
let fileId = chatData.avatars?.current?.fileId else {
|
||
return nil
|
||
}
|
||
let userId = chatData.userId
|
||
return URL(string: "\(AppConfig.API_SERVER)/v1/storage/download/avatar/\(userId)?file_id=\(fileId)")
|
||
}
|
||
|
||
private var avatarInitial: String {
|
||
if let name = trimmed(chat.chatData?.customName) ?? trimmed(chat.chatData?.fullName) {
|
||
let components = name.split(separator: " ")
|
||
let initials = components.prefix(2).compactMap { $0.first }
|
||
if !initials.isEmpty {
|
||
return initials.map { String($0) }.joined().uppercased()
|
||
}
|
||
}
|
||
|
||
if let login = trimmed(chat.chatData?.login) {
|
||
return String(login.prefix(1)).uppercased()
|
||
}
|
||
|
||
return "?"
|
||
}
|
||
|
||
private func trimmed(_ string: String?) -> String? {
|
||
guard let string = string?.trimmingCharacters(in: .whitespacesAndNewlines), !string.isEmpty else {
|
||
return nil
|
||
}
|
||
return string
|
||
}
|
||
|
||
private var chatToolbarContent: some View {
|
||
HStack(spacing: 12) {
|
||
backButton
|
||
|
||
// Spacer(minLength: 0)
|
||
|
||
nameStatusButton
|
||
.frame(maxWidth: .infinity)
|
||
|
||
// Spacer(minLength: 0)
|
||
|
||
avatarButton
|
||
}
|
||
.frame(maxWidth: .infinity, minHeight: headerAvatarSize, alignment: .center)
|
||
}
|
||
|
||
@ViewBuilder
|
||
private var nameStatusView: some View {
|
||
VStack(spacing: 2) {
|
||
if let officialName = officialDisplayName {
|
||
HStack(spacing: 4) {
|
||
nameText(officialName, weight: .semibold)
|
||
|
||
Image(systemName: "checkmark.seal.fill")
|
||
.foregroundColor(Color.accentColor)
|
||
.font(.caption)
|
||
}
|
||
} else {
|
||
nameText(title, weight: .semibold)
|
||
}
|
||
|
||
Text(offlineStatusText)
|
||
.font(.caption)
|
||
.foregroundColor(.secondary)
|
||
}
|
||
.multilineTextAlignment(.center)
|
||
}
|
||
|
||
@ViewBuilder
|
||
private var avatarView: some View {
|
||
if let url = avatarUrl,
|
||
let fileId = chat.chatData?.avatars?.current?.fileId,
|
||
let userId = currentUserId {
|
||
CachedAvatarView(url: url, fileId: fileId, userId: userId) {
|
||
headerPlaceholderAvatar
|
||
}
|
||
.aspectRatio(contentMode: .fill)
|
||
.frame(width: headerAvatarSize, height: headerAvatarSize)
|
||
.clipShape(Circle())
|
||
} else {
|
||
headerPlaceholderAvatar
|
||
}
|
||
}
|
||
|
||
private var nameStatusButton: some View {
|
||
Button(action: openProfile) {
|
||
nameStatusView
|
||
}
|
||
.buttonStyle(.plain)
|
||
}
|
||
|
||
private var avatarButton: some View {
|
||
Button(action: openProfile) {
|
||
avatarView
|
||
}
|
||
.buttonStyle(.plain)
|
||
}
|
||
|
||
private func nameText(_ text: String, weight: Font.Weight) -> some View {
|
||
Group {
|
||
if #available(iOS 16.0, *) {
|
||
Text(text)
|
||
.font(.headline)
|
||
.fontWeight(weight)
|
||
.foregroundColor(.primary)
|
||
.lineLimit(1)
|
||
.truncationMode(.tail)
|
||
.strikethrough(isDeletedUser, color: Color.secondary)
|
||
} else {
|
||
Text(text)
|
||
.font(.headline)
|
||
.fontWeight(weight)
|
||
.foregroundColor(.primary)
|
||
.lineLimit(1)
|
||
.truncationMode(.tail)
|
||
}
|
||
}
|
||
}
|
||
|
||
private var backButton: some View {
|
||
Button(action: { dismiss() }) {
|
||
Image(systemName: "chevron.left")
|
||
.font(.system(size: 17, weight: .semibold))
|
||
.foregroundColor(.accentColor)
|
||
}
|
||
.frame(width: headerAvatarSize, height: headerAvatarSize)
|
||
.contentShape(Rectangle())
|
||
}
|
||
|
||
private func openProfile() {
|
||
isProfilePresented = true
|
||
}
|
||
|
||
private var headerPlaceholderAvatar: some View {
|
||
Circle()
|
||
.fill(avatarBackgroundColor)
|
||
.frame(width: headerAvatarSize, height: headerAvatarSize)
|
||
.overlay(
|
||
Group {
|
||
if isDeletedUser {
|
||
Image(systemName: deletedUserSymbolName)
|
||
.symbolRenderingMode(.hierarchical)
|
||
.font(.system(size: headerAvatarSize * 0.45, weight: .semibold))
|
||
.foregroundColor(avatarTextColor)
|
||
} else {
|
||
Text(avatarInitial)
|
||
.font(.system(size: headerAvatarSize * 0.5, weight: .semibold))
|
||
.foregroundColor(avatarTextColor)
|
||
}
|
||
}
|
||
)
|
||
}
|
||
}
|
||
|
||
|
||
#if canImport(UIKit)
|
||
private struct LegacyMultilineTextView: UIViewRepresentable {
|
||
@Binding var text: String
|
||
var placeholder: String
|
||
@Binding var isFocused: Bool
|
||
var isEnabled: Bool
|
||
var minHeight: CGFloat
|
||
var maxLines: Int
|
||
@Binding var calculatedHeight: CGFloat
|
||
var onSubmit: (() -> Void)?
|
||
|
||
func makeUIView(context: Context) -> UITextView {
|
||
let textView = UITextView()
|
||
textView.delegate = context.coordinator
|
||
textView.backgroundColor = .clear
|
||
textView.textContainerInset = .zero
|
||
textView.textContainer.lineFragmentPadding = 0
|
||
textView.isScrollEnabled = false
|
||
textView.font = UIFont.preferredFont(forTextStyle: .body)
|
||
textView.text = text
|
||
textView.returnKeyType = .send
|
||
textView.setContentCompressionResistancePriority(.defaultLow, for: .horizontal)
|
||
|
||
let placeholderLabel = context.coordinator.placeholderLabel
|
||
placeholderLabel.text = placeholder
|
||
placeholderLabel.font = textView.font
|
||
placeholderLabel.textColor = UIColor.secondaryLabel
|
||
placeholderLabel.numberOfLines = 1
|
||
placeholderLabel.translatesAutoresizingMaskIntoConstraints = false
|
||
textView.addSubview(placeholderLabel)
|
||
|
||
NSLayoutConstraint.activate([
|
||
placeholderLabel.topAnchor.constraint(equalTo: textView.topAnchor),
|
||
placeholderLabel.leadingAnchor.constraint(equalTo: textView.leadingAnchor),
|
||
placeholderLabel.trailingAnchor.constraint(lessThanOrEqualTo: textView.trailingAnchor)
|
||
])
|
||
|
||
context.coordinator.updatePlaceholderVisibility(for: textView)
|
||
DispatchQueue.main.async {
|
||
Self.recalculateHeight(
|
||
for: textView,
|
||
result: calculatedHeightBinding,
|
||
minHeight: minHeight,
|
||
maxLines: maxLines
|
||
)
|
||
}
|
||
|
||
return textView
|
||
}
|
||
|
||
func updateUIView(_ uiView: UITextView, context: Context) {
|
||
context.coordinator.parent = self
|
||
|
||
if uiView.text != text {
|
||
uiView.text = text
|
||
}
|
||
|
||
uiView.isEditable = isEnabled
|
||
uiView.isSelectable = isEnabled
|
||
uiView.textColor = isEnabled ? UIColor.label : UIColor.secondaryLabel
|
||
|
||
let placeholderLabel = context.coordinator.placeholderLabel
|
||
if placeholderLabel.text != placeholder {
|
||
placeholderLabel.text = placeholder
|
||
}
|
||
placeholderLabel.font = uiView.font
|
||
context.coordinator.updatePlaceholderVisibility(for: uiView)
|
||
|
||
if isFocused && !uiView.isFirstResponder {
|
||
uiView.becomeFirstResponder()
|
||
} else if !isFocused && uiView.isFirstResponder {
|
||
uiView.resignFirstResponder()
|
||
}
|
||
|
||
Self.recalculateHeight(
|
||
for: uiView,
|
||
result: calculatedHeightBinding,
|
||
minHeight: minHeight,
|
||
maxLines: maxLines
|
||
)
|
||
}
|
||
|
||
func makeCoordinator() -> Coordinator {
|
||
Coordinator(parent: self)
|
||
}
|
||
|
||
private var calculatedHeightBinding: Binding<CGFloat> {
|
||
Binding(get: { calculatedHeight }, set: { calculatedHeight = $0 })
|
||
}
|
||
|
||
private static func recalculateHeight(for textView: UITextView, result: Binding<CGFloat>, minHeight: CGFloat, maxLines: Int) {
|
||
let width = textView.bounds.width
|
||
guard width > 0 else {
|
||
DispatchQueue.main.async {
|
||
recalculateHeight(for: textView, result: result, minHeight: minHeight, maxLines: maxLines)
|
||
}
|
||
return
|
||
}
|
||
|
||
let fittingSize = CGSize(width: width, height: .greatestFiniteMagnitude)
|
||
let targetSize = textView.sizeThatFits(fittingSize)
|
||
let lineHeight = textView.font?.lineHeight ?? UIFont.preferredFont(forTextStyle: .body).lineHeight
|
||
let maxHeight = minHeight + lineHeight * CGFloat(max(maxLines - 1, 0))
|
||
let clampedHeight = min(max(targetSize.height, minHeight), maxHeight)
|
||
let shouldScroll = targetSize.height > maxHeight + 0.5
|
||
|
||
if abs(result.wrappedValue - clampedHeight) > 0.5 {
|
||
let newHeight = clampedHeight
|
||
DispatchQueue.main.async {
|
||
if abs(result.wrappedValue - newHeight) > 0.5 {
|
||
result.wrappedValue = newHeight
|
||
}
|
||
}
|
||
}
|
||
|
||
textView.isScrollEnabled = shouldScroll
|
||
}
|
||
|
||
final class Coordinator: NSObject, UITextViewDelegate {
|
||
var parent: LegacyMultilineTextView
|
||
let placeholderLabel = UILabel()
|
||
|
||
init(parent: LegacyMultilineTextView) {
|
||
self.parent = parent
|
||
}
|
||
|
||
func textViewDidBeginEditing(_ textView: UITextView) {
|
||
if !parent.isFocused {
|
||
parent.isFocused = true
|
||
}
|
||
}
|
||
|
||
func textViewDidEndEditing(_ textView: UITextView) {
|
||
if parent.isFocused {
|
||
parent.isFocused = false
|
||
}
|
||
}
|
||
|
||
func textViewDidChange(_ textView: UITextView) {
|
||
if parent.text != textView.text {
|
||
parent.text = textView.text
|
||
}
|
||
updatePlaceholderVisibility(for: textView)
|
||
LegacyMultilineTextView.recalculateHeight(for: textView, result: parent.calculatedHeightBinding, minHeight: parent.minHeight, maxLines: parent.maxLines)
|
||
}
|
||
|
||
func textView(_ textView: UITextView, shouldChangeTextIn range: NSRange, replacementText text: String) -> Bool {
|
||
if text == "\n" {
|
||
if let onSubmit = parent.onSubmit {
|
||
DispatchQueue.main.async {
|
||
onSubmit()
|
||
}
|
||
return false
|
||
}
|
||
}
|
||
return true
|
||
}
|
||
|
||
func updatePlaceholderVisibility(for textView: UITextView) {
|
||
placeholderLabel.isHidden = !textView.text.isEmpty
|
||
}
|
||
}
|
||
}
|
||
#endif
|
||
|
||
// MARK: - Preview
|
||
|
||
// Previews intentionally omitted - MessageItem has custom decoding-only initializer.
|