279 lines
9.6 KiB
Swift
279 lines
9.6 KiB
Swift
//
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// ComposeHostingController.swift
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// Tusker
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//
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// Created by Shadowfacts on 8/22/20.
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// Copyright © 2020 Shadowfacts. All rights reserved.
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//
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import SwiftUI
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import Combine
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import Pachyderm
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import PencilKit
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import Duckable
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protocol ComposeHostingControllerDelegate: AnyObject {
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func dismissCompose(mode: ComposeUIState.DismissMode) -> Bool
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}
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class ComposeHostingController: UIHostingController<ComposeHostingController.Wrapper>, DuckableViewController {
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weak var delegate: ComposeHostingControllerDelegate?
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weak var duckableDelegate: DuckableViewControllerDelegate?
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let mastodonController: MastodonController
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let uiState: ComposeUIState
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var draft: Draft { uiState.draft }
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private var cancellables = [AnyCancellable]()
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init(draft: Draft? = nil, mastodonController: MastodonController) {
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self.mastodonController = mastodonController
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let realDraft = draft ?? Draft(accountID: mastodonController.accountInfo!.id)
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DraftsManager.shared.add(realDraft)
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self.uiState = ComposeUIState(draft: realDraft)
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let wrapper = Wrapper(
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mastodonController: mastodonController,
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uiState: uiState
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)
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super.init(rootView: wrapper)
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self.uiState.delegate = self
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pasteConfiguration = UIPasteConfiguration(forAccepting: CompositionAttachment.self)
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userActivity = UserActivityManager.newPostActivity(accountID: mastodonController.accountInfo!.id)
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updateNavigationTitle(draft: uiState.draft)
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self.uiState.$draft
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.flatMap(\.objectWillChange)
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.debounce(for: .milliseconds(250), scheduler: DispatchQueue.global(qos: .utility))
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.sink {
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DraftsManager.save()
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}
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.store(in: &cancellables)
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self.uiState.$draft
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.sink { [unowned self] draft in
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self.updateNavigationTitle(draft: draft)
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}
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.store(in: &cancellables)
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}
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required init?(coder aDecoder: NSCoder) {
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fatalError("init(coder:) has not been implemented")
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}
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private func updateNavigationTitle(draft: Draft) {
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if let id = draft.inReplyToID,
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let status = mastodonController.persistentContainer.status(for: id) {
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navigationItem.title = "Reply to @\(status.account.acct)"
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} else {
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navigationItem.title = "New Post"
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}
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}
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override func viewWillDisappear(_ animated: Bool) {
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super.viewWillDisappear(animated)
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if !draft.hasContent {
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DraftsManager.shared.remove(draft)
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}
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DraftsManager.save()
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}
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override func canPaste(_ itemProviders: [NSItemProvider]) -> Bool {
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guard itemProviders.allSatisfy({ $0.canLoadObject(ofClass: CompositionAttachment.self) }) else { return false }
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if mastodonController.instanceFeatures.mastodonAttachmentRestrictions {
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guard draft.attachments.allSatisfy({ $0.data.type == .image }) else { return false }
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// todo: if providers are videos, this technically allows invalid video/image combinations
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return itemProviders.count + draft.attachments.count <= 4
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} else {
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return true
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}
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}
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override func paste(itemProviders: [NSItemProvider]) {
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for provider in itemProviders where provider.canLoadObject(ofClass: CompositionAttachment.self) {
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provider.loadObject(ofClass: CompositionAttachment.self) { (object, error) in
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guard let attachment = object as? CompositionAttachment else { return }
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DispatchQueue.main.async {
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self.draft.attachments.append(attachment)
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}
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}
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}
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}
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override func accessibilityPerformEscape() -> Bool {
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dismissCompose(mode: .cancel)
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return true
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}
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// MARK: Duckable
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func duckableViewControllerWillAnimateDuck(withDuration duration: CGFloat, afterDelay delay: CGFloat) {
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withAnimation(.linear(duration: duration).delay(delay)) {
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uiState.isDucking = true
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}
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}
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func duckableViewControllerDidFinishAnimatingDuck() {
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uiState.isDucking = false
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}
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// MARK: Interaction
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@objc func cwButtonPressed() {
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draft.contentWarningEnabled = !draft.contentWarningEnabled
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}
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@objc func formatButtonPressed(_ sender: UIBarButtonItem) {
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let format = StatusFormat.allCases[sender.tag]
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uiState.currentInput?.applyFormat(format)
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}
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@objc func emojiPickerButtonPressed() {
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guard uiState.autocompleteState == nil else {
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return
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}
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uiState.shouldEmojiAutocompletionBeginExpanded = true
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uiState.currentInput?.beginAutocompletingEmoji()
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}
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@objc func draftsButtonPresed() {
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uiState.isShowingDraftsList = true
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}
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}
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extension ComposeHostingController {
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struct Wrapper: View {
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let mastodonController: MastodonController
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@ObservedObject var uiState: ComposeUIState
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var draft: Draft {
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uiState.draft
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}
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var body: some View {
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ComposeView()
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.environmentObject(mastodonController)
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.environmentObject(uiState)
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.environmentObject(draft)
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}
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}
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}
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extension ComposeHostingController: ComposeUIStateDelegate {
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var assetPickerDelegate: AssetPickerViewControllerDelegate? { self }
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func dismissCompose(mode: ComposeUIState.DismissMode) {
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let dismissed = delegate?.dismissCompose(mode: mode) ?? false
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if !dismissed {
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self.dismiss(animated: true)
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self.duckableDelegate?.duckableViewControllerWillDismiss(animated: true)
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}
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}
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func presentAssetPickerSheet() {
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let picker = AssetPickerViewController()
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picker.assetPickerDelegate = self
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picker.modalPresentationStyle = .pageSheet
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picker.overrideUserInterfaceStyle = .dark
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let sheet = picker.sheetPresentationController!
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sheet.detents = [.medium(), .large()]
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sheet.prefersEdgeAttachedInCompactHeight = true
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self.present(picker, animated: true)
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}
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func presentComposeDrawing() {
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let drawing: PKDrawing
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if case let .edit(id) = uiState.composeDrawingMode,
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let attachment = draft.attachments.first(where: { $0.id == id }),
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case let .drawing(existingDrawing) = attachment.data {
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drawing = existingDrawing
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} else {
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drawing = PKDrawing()
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}
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present(ComposeDrawingNavigationController(editing: drawing, delegate: self), animated: true)
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}
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func selectDraft(_ draft: Draft) {
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if self.draft.hasContent {
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DraftsManager.save()
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} else {
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DraftsManager.shared.remove(self.draft)
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}
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uiState.draft = draft
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uiState.isShowingDraftsList = false
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}
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}
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extension ComposeHostingController: AssetPickerViewControllerDelegate {
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func assetPicker(_ assetPicker: AssetPickerViewController, shouldAllowAssetOfType type: CompositionAttachmentData.AttachmentType) -> Bool {
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if mastodonController.instanceFeatures.mastodonAttachmentRestrictions {
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if (type == .video && draft.attachments.count > 0) ||
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draft.attachments.contains(where: { $0.data.type == .video }) ||
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assetPicker.currentCollectionSelectedAssets.contains(where: { $0.type == .video }) {
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return false
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}
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return draft.attachments.count + assetPicker.currentCollectionSelectedAssets.count < 4
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} else {
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return true
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}
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}
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func assetPicker(_ assetPicker: AssetPickerViewController, didSelectAttachments attachments: [CompositionAttachmentData]) {
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let attachments = attachments.map {
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CompositionAttachment(data: $0)
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}
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withAnimation {
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draft.attachments.append(contentsOf: attachments)
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}
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}
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}
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// superseded by duckable stuff
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@available(iOS, obsoleted: 16.0)
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extension ComposeHostingController: UIAdaptivePresentationControllerDelegate {
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func presentationControllerShouldDismiss(_ presentationController: UIPresentationController) -> Bool {
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return Preferences.shared.automaticallySaveDrafts || !draft.hasContent
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}
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func presentationControllerWillDismiss(_ presentationController: UIPresentationController) {
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UIApplication.shared.sendAction(#selector(UIResponder.resignFirstResponder), to: nil, from: self, for: nil)
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}
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func presentationControllerDidAttemptToDismiss(_ presentationController: UIPresentationController) {
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uiState.isShowingSaveDraftSheet = true
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}
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func presentationControllerDidDismiss(_ presentationController: UIPresentationController) {
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DraftsManager.save()
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}
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}
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extension ComposeHostingController: ComposeDrawingViewControllerDelegate {
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func composeDrawingViewControllerClose(_ drawingController: ComposeDrawingViewController) {
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dismiss(animated: true)
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}
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func composeDrawingViewController(_ drawingController: ComposeDrawingViewController, saveDrawing drawing: PKDrawing) {
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switch uiState.composeDrawingMode {
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case nil, .createNew:
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let attachment = CompositionAttachment(data: .drawing(drawing))
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draft.attachments.append(attachment)
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case let .edit(id):
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let existing = draft.attachments.first { $0.id == id }
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existing?.data = .drawing(drawing)
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}
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dismiss(animated: true)
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}
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}
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