510 lines
23 KiB
Swift
510 lines
23 KiB
Swift
//
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// ComposeViewController.swift
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// Mastodon
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//
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// Created by MainasuK Cirno on 2021-3-11.
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//
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import os.log
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import UIKit
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import Combine
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import PhotosUI
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import Kingfisher
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import TwitterTextEditor
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final class ComposeViewController: UIViewController, NeedsDependency {
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weak var context: AppContext! { willSet { precondition(!isViewLoaded) } }
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weak var coordinator: SceneCoordinator! { willSet { precondition(!isViewLoaded) } }
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var disposeBag = Set<AnyCancellable>()
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var viewModel: ComposeViewModel!
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private var suffixedAttachmentViews: [UIView] = []
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let publishButton: UIButton = {
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let button = RoundedEdgesButton(type: .custom)
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button.setTitle(L10n.Scene.Compose.composeAction, for: .normal)
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button.titleLabel?.font = .systemFont(ofSize: 14, weight: .bold)
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button.setBackgroundImage(.placeholder(color: Asset.Colors.Button.normal.color), for: .normal)
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button.setBackgroundImage(.placeholder(color: Asset.Colors.Button.normal.color.withAlphaComponent(0.5)), for: .highlighted)
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button.setBackgroundImage(.placeholder(color: Asset.Colors.Button.disabled.color), for: .disabled)
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button.setTitleColor(.white, for: .normal)
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button.contentEdgeInsets = UIEdgeInsets(top: 3, left: 16, bottom: 3, right: 16)
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button.adjustsImageWhenHighlighted = false
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return button
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}()
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private(set) lazy var publishBarButtonItem: UIBarButtonItem = {
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let barButtonItem = UIBarButtonItem(customView: publishButton)
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return barButtonItem
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}()
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let tableView: UITableView = {
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let tableView = ControlContainableTableView()
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tableView.register(ComposeRepliedToTootContentTableViewCell.self, forCellReuseIdentifier: String(describing: ComposeRepliedToTootContentTableViewCell.self))
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tableView.register(ComposeStatusContentTableViewCell.self, forCellReuseIdentifier: String(describing: ComposeStatusContentTableViewCell.self))
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tableView.register(ComposeStatusAttachmentTableViewCell.self, forCellReuseIdentifier: String(describing: ComposeStatusAttachmentTableViewCell.self))
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tableView.rowHeight = UITableView.automaticDimension
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tableView.separatorStyle = .none
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tableView.showsVerticalScrollIndicator = false
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return tableView
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}()
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let composeToolbarView: ComposeToolbarView = {
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let composeToolbarView = ComposeToolbarView()
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composeToolbarView.backgroundColor = .secondarySystemBackground
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return composeToolbarView
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}()
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var composeToolbarViewBottomLayoutConstraint: NSLayoutConstraint!
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let composeToolbarBackgroundView: UIView = {
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let backgroundView = UIView()
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backgroundView.backgroundColor = .secondarySystemBackground
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return backgroundView
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}()
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lazy var imagePicker: PHPickerViewController = {
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var configuration = PHPickerConfiguration()
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configuration.filter = .images
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configuration.selectionLimit = 4
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let imagePicker = PHPickerViewController(configuration: configuration)
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imagePicker.delegate = self
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return imagePicker
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}()
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}
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extension ComposeViewController {
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override func viewDidLoad() {
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super.viewDidLoad()
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viewModel.title
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.receive(on: DispatchQueue.main)
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.sink { [weak self] title in
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guard let self = self else { return }
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self.title = title
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}
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.store(in: &disposeBag)
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view.backgroundColor = Asset.Colors.Background.systemBackground.color
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navigationItem.leftBarButtonItem = UIBarButtonItem(title: L10n.Common.Controls.Actions.cancel, style: .plain, target: self, action: #selector(ComposeViewController.cancelBarButtonItemPressed(_:)))
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navigationItem.rightBarButtonItem = publishBarButtonItem
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publishButton.addTarget(self, action: #selector(ComposeViewController.publishBarButtonItemPressed(_:)), for: .touchUpInside)
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tableView.translatesAutoresizingMaskIntoConstraints = false
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view.addSubview(tableView)
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NSLayoutConstraint.activate([
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tableView.topAnchor.constraint(equalTo: view.topAnchor),
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tableView.leadingAnchor.constraint(equalTo: view.leadingAnchor),
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tableView.trailingAnchor.constraint(equalTo: view.trailingAnchor),
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tableView.bottomAnchor.constraint(equalTo: view.bottomAnchor),
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])
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composeToolbarView.translatesAutoresizingMaskIntoConstraints = false
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view.addSubview(composeToolbarView)
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composeToolbarViewBottomLayoutConstraint = view.bottomAnchor.constraint(equalTo: composeToolbarView.bottomAnchor)
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NSLayoutConstraint.activate([
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composeToolbarView.leadingAnchor.constraint(equalTo: view.leadingAnchor),
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composeToolbarView.trailingAnchor.constraint(equalTo: view.trailingAnchor),
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composeToolbarViewBottomLayoutConstraint,
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composeToolbarView.heightAnchor.constraint(equalToConstant: ComposeToolbarView.toolbarHeight),
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])
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composeToolbarView.preservesSuperviewLayoutMargins = true
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composeToolbarView.delegate = self
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composeToolbarBackgroundView.translatesAutoresizingMaskIntoConstraints = false
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view.insertSubview(composeToolbarBackgroundView, belowSubview: composeToolbarView)
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NSLayoutConstraint.activate([
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composeToolbarBackgroundView.topAnchor.constraint(equalTo: composeToolbarView.topAnchor),
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composeToolbarBackgroundView.leadingAnchor.constraint(equalTo: composeToolbarView.leadingAnchor),
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composeToolbarBackgroundView.trailingAnchor.constraint(equalTo: composeToolbarView.trailingAnchor),
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view.bottomAnchor.constraint(equalTo: composeToolbarBackgroundView.bottomAnchor),
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])
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tableView.delegate = self
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viewModel.setupDiffableDataSource(
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for: tableView,
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dependency: self,
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textEditorViewTextAttributesDelegate: self,
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composeStatusAttachmentTableViewCellDelegate: self
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)
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// respond scrollView overlap change
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view.layoutIfNeeded()
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// update layout when keyboard show/dismiss
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Publishers.CombineLatest3(
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KeyboardResponderService.shared.isShow.eraseToAnyPublisher(),
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KeyboardResponderService.shared.state.eraseToAnyPublisher(),
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KeyboardResponderService.shared.endFrame.eraseToAnyPublisher()
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)
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.sink(receiveValue: { [weak self] isShow, state, endFrame in
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guard let self = self else { return }
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guard isShow, state == .dock else {
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self.tableView.contentInset.bottom = 0.0
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self.tableView.verticalScrollIndicatorInsets.bottom = 0.0
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UIView.animate(withDuration: 0.3) {
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self.composeToolbarViewBottomLayoutConstraint.constant = 0.0
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self.view.layoutIfNeeded()
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}
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return
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}
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// isShow AND dock state
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let contentFrame = self.view.convert(self.tableView.frame, to: nil)
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let padding = contentFrame.maxY - endFrame.minY
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guard padding > 0 else {
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self.tableView.contentInset.bottom = 0.0
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self.tableView.verticalScrollIndicatorInsets.bottom = 0.0
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UIView.animate(withDuration: 0.3) {
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self.composeToolbarViewBottomLayoutConstraint.constant = 0.0
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self.view.layoutIfNeeded()
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}
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return
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}
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// add 16pt margin
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self.tableView.contentInset.bottom = padding + 16
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self.tableView.verticalScrollIndicatorInsets.bottom = padding + 16
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UIView.animate(withDuration: 0.3) {
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self.composeToolbarViewBottomLayoutConstraint.constant = padding
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self.view.layoutIfNeeded()
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}
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})
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.store(in: &disposeBag)
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viewModel.isComposeTootBarButtonItemEnabled
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.receive(on: DispatchQueue.main)
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.assign(to: \.isEnabled, on: publishBarButtonItem)
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.store(in: &disposeBag)
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// bind custom emojis
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viewModel.customEmojiViewModel
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.compactMap { $0?.emojis }
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.switchToLatest()
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.sink(receiveValue: { [weak self] emojis in
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guard let self = self else { return }
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for emoji in emojis {
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UITextChecker.learnWord(emoji.shortcode)
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UITextChecker.learnWord(":" + emoji.shortcode + ":")
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}
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self.textEditorView()?.setNeedsUpdateTextAttributes()
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})
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.store(in: &disposeBag)
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// bind image picker toolbar state
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viewModel.attachmentServices
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.receive(on: DispatchQueue.main)
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.sink { [weak self] attachmentServices in
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guard let self = self else { return }
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self.composeToolbarView.mediaButton.isEnabled = attachmentServices.count < 4
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self.resetImagePicker()
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}
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.store(in: &disposeBag)
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}
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override func viewWillAppear(_ animated: Bool) {
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super.viewWillAppear(animated)
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// Fix AutoLayout conflict issue
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DispatchQueue.main.async { [weak self] in
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guard let self = self else { return }
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self.markTextEditorViewBecomeFirstResponser()
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}
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}
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}
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extension ComposeViewController {
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private func textEditorView() -> TextEditorView? {
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guard let diffableDataSource = viewModel.diffableDataSource else { return nil }
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let items = diffableDataSource.snapshot().itemIdentifiers
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for item in items {
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switch item {
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case .input:
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guard let indexPath = diffableDataSource.indexPath(for: item),
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let cell = tableView.cellForRow(at: indexPath) as? ComposeStatusContentTableViewCell else {
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continue
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}
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return cell.textEditorView
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default:
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continue
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}
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}
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return nil
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}
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private func markTextEditorViewBecomeFirstResponser() {
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textEditorView()?.isEditing = true
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}
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private func showDismissConfirmAlertController() {
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let alertController = UIAlertController(
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title: L10n.Common.Alerts.DiscardPostContent.title,
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message: L10n.Common.Alerts.DiscardPostContent.message,
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preferredStyle: .alert
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)
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let discardAction = UIAlertAction(title: L10n.Common.Controls.Actions.discard, style: .destructive) { [weak self] _ in
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guard let self = self else { return }
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self.dismiss(animated: true, completion: nil)
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}
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alertController.addAction(discardAction)
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let cancelAction = UIAlertAction(title: L10n.Common.Controls.Actions.cancel, style: .cancel)
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alertController.addAction(cancelAction)
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present(alertController, animated: true, completion: nil)
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}
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private func resetImagePicker() {
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var configuration = PHPickerConfiguration()
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configuration.filter = .images
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let selectionLimit = max(1, 4 - viewModel.attachmentServices.value.count)
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configuration.selectionLimit = selectionLimit
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imagePicker = createImagePicker(configuration: configuration)
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}
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private func createImagePicker(configuration: PHPickerConfiguration) -> PHPickerViewController {
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let imagePicker = PHPickerViewController(configuration: configuration)
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imagePicker.delegate = self
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return imagePicker
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}
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}
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extension ComposeViewController {
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@objc private func cancelBarButtonItemPressed(_ sender: UIBarButtonItem) {
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os_log(.info, log: .debug, "%{public}s[%{public}ld], %{public}s", ((#file as NSString).lastPathComponent), #line, #function)
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guard viewModel.shouldDismiss.value else {
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showDismissConfirmAlertController()
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return
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}
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dismiss(animated: true, completion: nil)
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}
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@objc private func publishBarButtonItemPressed(_ sender: UIBarButtonItem) {
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os_log(.info, log: .debug, "%{public}s[%{public}ld], %{public}s", ((#file as NSString).lastPathComponent), #line, #function)
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guard viewModel.publishStateMachine.enter(ComposeViewModel.PublishState.Publishing.self) else {
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// TODO: handle error
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return
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}
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dismiss(animated: true, completion: nil)
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}
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}
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// MARK: - TextEditorViewTextAttributesDelegate
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extension ComposeViewController: TextEditorViewTextAttributesDelegate {
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func textEditorView(
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_ textEditorView: TextEditorView,
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updateAttributedString attributedString: NSAttributedString,
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completion: @escaping (NSAttributedString?) -> Void
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) {
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DispatchQueue.global().async {
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let string = attributedString.string
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os_log(.info, log: .debug, "%{public}s[%{public}ld], %{public}s: update: %s", ((#file as NSString).lastPathComponent), #line, #function, string)
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let stringRange = NSRange(location: 0, length: string.length)
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let highlightMatches = string.matches(pattern: "(?:@([a-zA-Z0-9_]+)|#([^\\s.]+))")
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// accept ^\B: or \s: but not accept \B: to force user input a space to make emoji take effect
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// precondition :\B with following space
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let emojiMatches = string.matches(pattern: "(?:(^\\B:|\\s:)([a-zA-Z0-9_]+)(:\\B(?=\\s)))")
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// only accept http/https scheme
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let urlMatches = string.matches(pattern: "(?i)https?://\\S+(?:/|\\b)")
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DispatchQueue.main.async { [weak self] in
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guard let self = self else {
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completion(nil)
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return
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}
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let customEmojiViewModel = self.viewModel.customEmojiViewModel.value
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for view in self.suffixedAttachmentViews {
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view.removeFromSuperview()
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}
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self.suffixedAttachmentViews.removeAll()
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// set normal apperance
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let attributedString = NSMutableAttributedString(attributedString: attributedString)
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attributedString.removeAttribute(.suffixedAttachment, range: stringRange)
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attributedString.removeAttribute(.underlineStyle, range: stringRange)
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attributedString.addAttribute(.foregroundColor, value: Asset.Colors.Label.primary.color, range: stringRange)
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attributedString.addAttribute(.font, value: UIFont.preferredFont(forTextStyle: .body), range: stringRange)
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// hashtag
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for match in highlightMatches {
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// set highlight
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var attributes = [NSAttributedString.Key: Any]()
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attributes[.foregroundColor] = Asset.Colors.Label.highlight.color
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// See `traitCollectionDidChange(_:)`
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// set accessibility
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if #available(iOS 13.0, *) {
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switch self.traitCollection.accessibilityContrast {
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case .high:
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attributes[.underlineStyle] = NSUnderlineStyle.single.rawValue
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default:
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break
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}
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}
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attributedString.addAttributes(attributes, range: match.range)
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}
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// emoji
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let emojis = customEmojiViewModel?.emojis.value ?? []
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if !emojis.isEmpty {
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for match in emojiMatches {
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guard let name = string.substring(with: match, at: 2) else { continue }
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guard let emoji = emojis.first(where: { $0.shortcode == name }) else { continue }
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os_log(.info, log: .debug, "%{public}s[%{public}ld], %{public}s: handle emoji: %s", ((#file as NSString).lastPathComponent), #line, #function, name)
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// set emoji token invisiable (without upper bounce space)
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var attributes = [NSAttributedString.Key: Any]()
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attributes[.font] = UIFont.systemFont(ofSize: 0.01)
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attributedString.addAttributes(attributes, range: match.range)
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// append emoji attachment
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let imageViewSize = CGSize(width: 20, height: 20)
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let imageView = UIImageView(frame: CGRect(origin: .zero, size: imageViewSize))
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textEditorView.textContentView.addSubview(imageView)
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self.suffixedAttachmentViews.append(imageView)
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let processor = DownsamplingImageProcessor(size: imageViewSize)
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imageView.kf.setImage(
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with: URL(string: emoji.url),
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placeholder: UIImage.placeholder(size: imageViewSize, color: .systemFill),
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options: [
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.processor(processor),
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.scaleFactor(textEditorView.traitCollection.displayScale),
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], completionHandler: nil
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)
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let layoutInTextContainer = { [weak textEditorView] (view: UIView, frame: CGRect) in
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// `textEditorView` retains `textStorage`, which retains this block as a part of attributes.
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guard let textEditorView = textEditorView else {
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return
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}
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let insets = textEditorView.textContentInsets
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view.frame = frame.offsetBy(dx: insets.left, dy: insets.top)
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}
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let attachment = TextAttributes.SuffixedAttachment(
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size: imageViewSize,
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attachment: .view(view: imageView, layoutInTextContainer: layoutInTextContainer)
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)
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let index = match.range.upperBound - 1
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attributedString.addAttribute(
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.suffixedAttachment,
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value: attachment,
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range: NSRange(location: index, length: 1)
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)
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}
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}
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// url
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for match in urlMatches {
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guard let name = string.substring(with: match, at: 0) else { continue }
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os_log(.info, log: .debug, "%{public}s[%{public}ld], %{public}s: handle emoji: %s", ((#file as NSString).lastPathComponent), #line, #function, name)
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// set highlight
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var attributes = [NSAttributedString.Key: Any]()
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attributes[.foregroundColor] = Asset.Colors.Label.highlight.color
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// See `traitCollectionDidChange(_:)`
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// set accessibility
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if #available(iOS 13.0, *) {
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switch self.traitCollection.accessibilityContrast {
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case .high:
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attributes[.underlineStyle] = NSUnderlineStyle.single.rawValue
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default:
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break
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}
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}
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attributedString.addAttributes(attributes, range: match.range)
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}
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completion(attributedString)
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}
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}
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}
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}
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// MARK: - ComposeToolbarViewDelegate
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extension ComposeViewController: ComposeToolbarViewDelegate {
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func composeToolbarView(_ composeToolbarView: ComposeToolbarView, cameraButtonDidPressed sender: UIButton) {
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os_log(.info, log: .debug, "%{public}s[%{public}ld], %{public}s", ((#file as NSString).lastPathComponent), #line, #function)
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present(imagePicker, animated: true, completion: nil)
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}
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func composeToolbarView(_ composeToolbarView: ComposeToolbarView, gifButtonDidPressed sender: UIButton) {
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os_log(.info, log: .debug, "%{public}s[%{public}ld], %{public}s", ((#file as NSString).lastPathComponent), #line, #function)
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}
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func composeToolbarView(_ composeToolbarView: ComposeToolbarView, atButtonDidPressed sender: UIButton) {
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os_log(.info, log: .debug, "%{public}s[%{public}ld], %{public}s", ((#file as NSString).lastPathComponent), #line, #function)
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}
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func composeToolbarView(_ composeToolbarView: ComposeToolbarView, topicButtonDidPressed sender: UIButton) {
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os_log(.info, log: .debug, "%{public}s[%{public}ld], %{public}s", ((#file as NSString).lastPathComponent), #line, #function)
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}
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func composeToolbarView(_ composeToolbarView: ComposeToolbarView, locationButtonDidPressed sender: UIButton) {
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os_log(.info, log: .debug, "%{public}s[%{public}ld], %{public}s", ((#file as NSString).lastPathComponent), #line, #function)
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}
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}
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// MARK: - UITableViewDelegate
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extension ComposeViewController: UITableViewDelegate {
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func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat {
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return UITableView.automaticDimension
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}
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}
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// MARK: - UIAdaptivePresentationControllerDelegate
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extension ComposeViewController: UIAdaptivePresentationControllerDelegate {
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func presentationControllerShouldDismiss(_ presentationController: UIPresentationController) -> Bool {
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return viewModel.shouldDismiss.value
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|
}
|
|
|
|
func presentationControllerDidAttemptToDismiss(_ presentationController: UIPresentationController) {
|
|
os_log(.info, log: .debug, "%{public}s[%{public}ld], %{public}s", ((#file as NSString).lastPathComponent), #line, #function)
|
|
showDismissConfirmAlertController()
|
|
|
|
}
|
|
|
|
func presentationControllerDidDismiss(_ presentationController: UIPresentationController) {
|
|
os_log(.info, log: .debug, "%{public}s[%{public}ld], %{public}s", ((#file as NSString).lastPathComponent), #line, #function)
|
|
}
|
|
|
|
}
|
|
|
|
// MARK: - PHPickerViewControllerDelegate
|
|
extension ComposeViewController: PHPickerViewControllerDelegate {
|
|
func picker(_ picker: PHPickerViewController, didFinishPicking results: [PHPickerResult]) {
|
|
picker.dismiss(animated: true, completion: nil)
|
|
let attachmentServices = results.map { MastodonAttachmentService(pickerResult: $0) }
|
|
viewModel.attachmentServices.value = viewModel.attachmentServices.value + attachmentServices
|
|
}
|
|
}
|
|
|
|
// MARK: - ComposeStatusAttachmentTableViewCellDelegate
|
|
extension ComposeViewController: ComposeStatusAttachmentTableViewCellDelegate {
|
|
|
|
func composeStatusAttachmentTableViewCell(_ cell: ComposeStatusAttachmentTableViewCell, removeButtonDidPressed button: UIButton) {
|
|
guard let diffableDataSource = viewModel.diffableDataSource else { return }
|
|
guard let indexPath = tableView.indexPath(for: cell) else { return }
|
|
guard let item = diffableDataSource.itemIdentifier(for: indexPath) else { return }
|
|
guard case let .attachment(attachmentService) = item else { return }
|
|
|
|
var attachmentServices = viewModel.attachmentServices.value
|
|
guard let index = attachmentServices.firstIndex(of: attachmentService) else { return }
|
|
attachmentServices.remove(at: index)
|
|
viewModel.attachmentServices.value = attachmentServices
|
|
}
|
|
|
|
}
|