Files
NetNewsWire/iOS/MasterFeed/MasterFeedViewController.swift
Brent Simmons 28b00260e0 Cache IconImage for feeds on the Feeds screen.
Empty the cache, and reload visible cells, when the trait collection changes, so that we get the proper icons for light/dark mode. This caching provides a small-but-worthwhile performance increase for the Feeds screen.
2021-05-01 12:29:18 -07:00

1430 lines
50 KiB
Swift

//
// MasterViewController.swift
// NetNewsWire
//
// Created by Maurice Parker on 4/8/19.
// Copyright © 2019 Ranchero Software. All rights reserved.
//
import UIKit
import Account
import Articles
import RSCore
import RSTree
import SafariServices
class MasterFeedViewController: UITableViewController, UndoableCommandRunner {
@IBOutlet weak var filterButton: UIBarButtonItem!
private var refreshProgressView: RefreshProgressView?
@IBOutlet weak var addNewItemButton: UIBarButtonItem! {
didSet {
if #available(iOS 14, *) {
addNewItemButton.primaryAction = nil
} else {
addNewItemButton.action = #selector(MasterFeedViewController.add(_:))
}
}
}
private let operationQueue = MainThreadOperationQueue()
lazy var dataSource = makeDataSource()
var undoableCommands = [UndoableCommand]()
weak var coordinator: SceneCoordinator!
private let keyboardManager = KeyboardManager(type: .sidebar)
override var keyCommands: [UIKeyCommand]? {
return keyboardManager.keyCommands
}
override var canBecomeFirstResponder: Bool {
return true
}
private var smartFeedIconImageCache = [FeedIdentifier: IconImage]()
private var webFeedIconImageCache = [FeedIdentifier: IconImage]()
private var faviconImageCache = [FeedIdentifier: IconImage]()
private var smallIconImageCache = [FeedIdentifier: IconImage]()
override func viewDidLoad() {
super.viewDidLoad()
if traitCollection.userInterfaceIdiom == .phone {
navigationController?.navigationBar.prefersLargeTitles = true
}
// If you don't have an empty table header, UIKit tries to help out by putting one in for you
// that makes a gap between the first section header and the navigation bar
var frame = CGRect.zero
frame.size.height = .leastNormalMagnitude
tableView.tableHeaderView = UIView(frame: frame)
tableView.register(MasterFeedTableViewSectionHeader.self, forHeaderFooterViewReuseIdentifier: "SectionHeader")
tableView.dataSource = dataSource
tableView.dragDelegate = self
tableView.dropDelegate = self
tableView.dragInteractionEnabled = true
resetEstimatedRowHeight()
tableView.separatorStyle = .none
NotificationCenter.default.addObserver(self, selector: #selector(unreadCountDidChange(_:)), name: .UnreadCountDidChange, object: nil)
NotificationCenter.default.addObserver(self, selector: #selector(faviconDidBecomeAvailable(_:)), name: .FaviconDidBecomeAvailable, object: nil)
NotificationCenter.default.addObserver(self, selector: #selector(webFeedIconDidBecomeAvailable(_:)), name: .WebFeedIconDidBecomeAvailable, object: nil)
NotificationCenter.default.addObserver(self, selector: #selector(webFeedSettingDidChange(_:)), name: .WebFeedSettingDidChange, object: nil)
NotificationCenter.default.addObserver(self, selector: #selector(contentSizeCategoryDidChange), name: UIContentSizeCategory.didChangeNotification, object: nil)
NotificationCenter.default.addObserver(self, selector: #selector(willEnterForeground(_:)), name: UIApplication.willEnterForegroundNotification, object: nil)
NotificationCenter.default.addObserver(self, selector: #selector(configureContextMenu(_:)), name: .ActiveExtensionPointsDidChange, object: nil)
refreshControl = UIRefreshControl()
refreshControl!.addTarget(self, action: #selector(refreshAccounts(_:)), for: .valueChanged)
configureToolbar()
becomeFirstResponder()
}
override func viewWillAppear(_ animated: Bool) {
updateUI()
super.viewWillAppear(animated)
}
override func traitCollectionDidChange(_ previousTraitCollection: UITraitCollection?) {
// Empty IconImage caches
smartFeedIconImageCache = [FeedIdentifier: IconImage]()
webFeedIconImageCache = [FeedIdentifier: IconImage]()
faviconImageCache = [FeedIdentifier: IconImage]()
smallIconImageCache = [FeedIdentifier: IconImage]()
super.traitCollectionDidChange(previousTraitCollection)
reloadAllVisibleCells()
}
// MARK: Notifications
@objc func unreadCountDidChange(_ note: Notification) {
updateUI()
guard let representedObject = note.object else {
return
}
if let account = representedObject as? Account {
if let node = coordinator.rootNode.childNodeRepresentingObject(account) {
let sectionIndex = coordinator.rootNode.indexOfChild(node)!
if let headerView = tableView.headerView(forSection: sectionIndex) as? MasterFeedTableViewSectionHeader {
headerView.unreadCount = account.unreadCount
}
}
return
}
var node: Node? = nil
if let coordinator = representedObject as? SceneCoordinator, let feed = coordinator.timelineFeed {
node = coordinator.rootNode.descendantNodeRepresentingObject(feed as AnyObject)
} else {
node = coordinator.rootNode.descendantNodeRepresentingObject(representedObject as AnyObject)
}
guard let unreadCountNode = node else { return }
let identifier = makeIdentifier(unreadCountNode)
if dataSource.indexPath(for: identifier) != nil {
self.reload(identifier)
}
}
@objc func faviconDidBecomeAvailable(_ note: Notification) {
applyToAvailableCells(configureIcon)
}
@objc func webFeedIconDidBecomeAvailable(_ note: Notification) {
guard let webFeed = note.userInfo?[UserInfoKey.webFeed] as? WebFeed else {
return
}
applyToCellsForRepresentedObject(webFeed, configureIcon(_:_:))
}
@objc func webFeedSettingDidChange(_ note: Notification) {
guard let webFeed = note.object as? WebFeed, let key = note.userInfo?[WebFeed.WebFeedSettingUserInfoKey] as? String else {
return
}
if key == WebFeed.WebFeedSettingKey.homePageURL || key == WebFeed.WebFeedSettingKey.faviconURL {
configureCellsForRepresentedObject(webFeed)
}
}
@objc func contentSizeCategoryDidChange(_ note: Notification) {
resetEstimatedRowHeight()
applyChanges(animated: false)
}
@objc func willEnterForeground(_ note: Notification) {
updateUI()
}
// MARK: Table View
override func tableView(_ tableView: UITableView, heightForHeaderInSection section: Int) -> CGFloat {
guard let nameProvider = coordinator.rootNode.childAtIndex(section)?.representedObject as? DisplayNameProvider else {
return 44
}
let headerView = MasterFeedTableViewSectionHeader()
headerView.name = nameProvider.nameForDisplay
let size = headerView.sizeThatFits(CGSize(width: tableView.bounds.width, height: 0.0))
return size.height
}
override func tableView(_ tableView: UITableView, viewForHeaderInSection section: Int) -> UIView? {
guard let nameProvider = coordinator.rootNode.childAtIndex(section)?.representedObject as? DisplayNameProvider else {
return nil
}
let headerView = tableView.dequeueReusableHeaderFooterView(withIdentifier: "SectionHeader") as! MasterFeedTableViewSectionHeader
headerView.delegate = self
headerView.name = nameProvider.nameForDisplay
guard let sectionNode = coordinator.rootNode.childAtIndex(section) else {
return headerView
}
if let account = sectionNode.representedObject as? Account {
headerView.unreadCount = account.unreadCount
} else {
headerView.unreadCount = 0
}
headerView.tag = section
headerView.disclosureExpanded = coordinator.isExpanded(sectionNode)
if section == tableView.numberOfSections - 1 {
headerView.isLastSection = true
} else {
headerView.isLastSection = false
}
headerView.gestureRecognizers?.removeAll()
let tap = UITapGestureRecognizer(target: self, action:#selector(self.toggleSectionHeader(_:)))
headerView.addGestureRecognizer(tap)
// Without this the swipe gesture registers on the cell below
let gestureRecognizer = UIPanGestureRecognizer(target: nil, action: nil)
gestureRecognizer.delegate = self
headerView.addGestureRecognizer(gestureRecognizer)
headerView.interactions.removeAll()
if section != 0 {
headerView.addInteraction(UIContextMenuInteraction(delegate: self))
}
return headerView
}
override func tableView(_ tableView: UITableView, heightForFooterInSection section: Int) -> CGFloat {
return CGFloat.leastNormalMagnitude
}
override func tableView(_ tableView: UITableView, viewForFooterInSection section: Int) -> UIView? {
return UIView(frame: CGRect.zero)
}
override func tableView(_ tableView: UITableView, trailingSwipeActionsConfigurationForRowAt indexPath: IndexPath) -> UISwipeActionsConfiguration? {
var actions = [UIContextualAction]()
// Set up the delete action
let deleteTitle = NSLocalizedString("Delete", comment: "Delete")
let deleteAction = UIContextualAction(style: .normal, title: deleteTitle) { [weak self] (action, view, completion) in
self?.delete(indexPath: indexPath)
completion(true)
}
deleteAction.backgroundColor = UIColor.systemRed
actions.append(deleteAction)
// Set up the rename action
let renameTitle = NSLocalizedString("Rename", comment: "Rename")
let renameAction = UIContextualAction(style: .normal, title: renameTitle) { [weak self] (action, view, completion) in
self?.rename(indexPath: indexPath)
completion(true)
}
renameAction.backgroundColor = UIColor.systemOrange
actions.append(renameAction)
if let identifier = dataSource.itemIdentifier(for: indexPath), identifier.isWebFeed {
let moreTitle = NSLocalizedString("More", comment: "More")
let moreAction = UIContextualAction(style: .normal, title: moreTitle) { [weak self] (action, view, completion) in
if let self = self {
let alert = UIAlertController(title: identifier.nameForDisplay, message: nil, preferredStyle: .actionSheet)
if let popoverController = alert.popoverPresentationController {
popoverController.sourceView = view
popoverController.sourceRect = CGRect(x: view.frame.size.width/2, y: view.frame.size.height/2, width: 1, height: 1)
}
if let action = self.getInfoAlertAction(indexPath: indexPath, completion: completion) {
alert.addAction(action)
}
if let action = self.homePageAlertAction(indexPath: indexPath, completion: completion) {
alert.addAction(action)
}
if let action = self.copyFeedPageAlertAction(indexPath: indexPath, completion: completion) {
alert.addAction(action)
}
if let action = self.copyHomePageAlertAction(indexPath: indexPath, completion: completion) {
alert.addAction(action)
}
if let action = self.markAllAsReadAlertAction(indexPath: indexPath, completion: completion) {
alert.addAction(action)
}
let cancelTitle = NSLocalizedString("Cancel", comment: "Cancel")
alert.addAction(UIAlertAction(title: cancelTitle, style: .cancel) { _ in
completion(true)
})
self.present(alert, animated: true)
}
}
moreAction.backgroundColor = UIColor.systemGray
actions.append(moreAction)
}
return UISwipeActionsConfiguration(actions: actions)
}
override func tableView(_ tableView: UITableView, contextMenuConfigurationForRowAt indexPath: IndexPath, point: CGPoint) -> UIContextMenuConfiguration? {
guard let identifier = dataSource.itemIdentifier(for: indexPath) else {
return nil
}
if identifier.isWebFeed {
return makeWebFeedContextMenu(identifier: identifier, indexPath: indexPath, includeDeleteRename: true)
} else if identifier.isFolder {
return makeFolderContextMenu(identifier: identifier, indexPath: indexPath)
} else if identifier.isPsuedoFeed {
return makePseudoFeedContextMenu(identifier: identifier, indexPath: indexPath)
} else {
return nil
}
}
override func tableView(_ tableView: UITableView, previewForHighlightingContextMenuWithConfiguration configuration: UIContextMenuConfiguration) -> UITargetedPreview? {
guard let identifier = configuration.identifier as? MasterFeedTableViewIdentifier,
let indexPath = dataSource.indexPath(for: identifier),
let cell = tableView.cellForRow(at: indexPath) else {
return nil
}
return UITargetedPreview(view: cell, parameters: CroppingPreviewParameters(view: cell))
}
override func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
becomeFirstResponder()
coordinator.selectFeed(indexPath: indexPath, animations: [.navigation, .select, .scroll])
}
override func tableView(_ tableView: UITableView, targetIndexPathForMoveFromRowAt sourceIndexPath: IndexPath, toProposedIndexPath proposedDestinationIndexPath: IndexPath) -> IndexPath {
// Adjust the index path so that it will never be in the smart feeds area
let destIndexPath: IndexPath = {
if proposedDestinationIndexPath.section == 0 {
return IndexPath(row: 0, section: 1)
}
return coordinator.cappedIndexPath(proposedDestinationIndexPath)
}()
guard let draggedIdentifier = dataSource.itemIdentifier(for: sourceIndexPath),
let draggedFeedID = draggedIdentifier.feedID,
let draggedNode = coordinator.nodeFor(feedID: draggedFeedID) else {
assertionFailure("This should never happen")
return sourceIndexPath
}
// If there is no destination node, we are dragging onto an empty Account
guard let destIdentifier = dataSource.itemIdentifier(for: destIndexPath),
let destFeedID = destIdentifier.feedID,
let destNode = coordinator.nodeFor(feedID: destFeedID),
let destParentContainerID = destIdentifier.parentContainerID,
let destParentNode = coordinator.nodeFor(containerID: destParentContainerID) else {
return proposedDestinationIndexPath
}
// If this is a folder, let the users drop on it
if destNode.representedObject is Folder {
return proposedDestinationIndexPath
}
// If we are dragging around in the same container, just return the original source
if destParentNode.childNodes.contains(draggedNode) {
return sourceIndexPath
}
// Suggest to the user the best place to drop the feed
// Revisit if the tree controller can ever be sorted in some other way.
let nodes = destParentNode.childNodes + [draggedNode]
var sortedNodes = nodes.sortedAlphabeticallyWithFoldersAtEnd()
let index = sortedNodes.firstIndex(of: draggedNode)!
sortedNodes.remove(at: index)
if index == 0 {
if destParentNode.representedObject is Account {
return IndexPath(row: 0, section: destIndexPath.section)
} else {
let identifier = makeIdentifier(sortedNodes[index])
if let candidateIndexPath = dataSource.indexPath(for: identifier) {
let movementAdjustment = sourceIndexPath < destIndexPath ? 1 : 0
return IndexPath(row: candidateIndexPath.row - movementAdjustment, section: candidateIndexPath.section)
} else {
return sourceIndexPath
}
}
} else {
if index >= sortedNodes.count {
let identifier = makeIdentifier(sortedNodes[sortedNodes.count - 1])
if let lastSortedIndexPath = dataSource.indexPath(for: identifier) {
let movementAdjustment = sourceIndexPath > destIndexPath ? 1 : 0
return IndexPath(row: lastSortedIndexPath.row + movementAdjustment, section: lastSortedIndexPath.section)
} else {
return sourceIndexPath
}
} else {
let movementAdjustment = sourceIndexPath < destIndexPath ? 1 : 0
let identifer = makeIdentifier(sortedNodes[index - movementAdjustment])
return dataSource.indexPath(for: identifer) ?? sourceIndexPath
}
}
}
// MARK: Actions
@IBAction func settings(_ sender: UIBarButtonItem) {
coordinator.showSettings()
}
@IBAction func toggleFilter(_ sender: Any) {
coordinator.toggleReadFeedsFilter()
}
@IBAction func add(_ sender: UIBarButtonItem) {
if #available(iOS 14, *) {
} else {
let title = NSLocalizedString("Add Item", comment: "Add Item")
let alertController = UIAlertController(title: title, message: nil, preferredStyle: .actionSheet)
let cancelTitle = NSLocalizedString("Cancel", comment: "Cancel")
let cancelAction = UIAlertAction(title: cancelTitle, style: .cancel)
let addWebFeedActionTitle = NSLocalizedString("Add Web Feed", comment: "Add Web Feed")
let addWebFeedAction = UIAlertAction(title: addWebFeedActionTitle, style: .default) { _ in
self.coordinator.showAddWebFeed()
}
let addRedditFeedActionTitle = NSLocalizedString("Add Reddit Feed", comment: "Add Reddit Feed")
let addRedditFeedAction = UIAlertAction(title: addRedditFeedActionTitle, style: .default) { _ in
self.coordinator.showAddRedditFeed()
}
let addTwitterFeedActionTitle = NSLocalizedString("Add Twitter Feed", comment: "Add Twitter Feed")
let addTwitterFeedAction = UIAlertAction(title: addTwitterFeedActionTitle, style: .default) { _ in
self.coordinator.showAddTwitterFeed()
}
let addWebFolderdActionTitle = NSLocalizedString("Add Folder", comment: "Add Folder")
let addWebFolderAction = UIAlertAction(title: addWebFolderdActionTitle, style: .default) { _ in
self.coordinator.showAddFolder()
}
alertController.addAction(addWebFeedAction)
if AccountManager.shared.activeAccounts.contains(where: { $0.type == .onMyMac || $0.type == .cloudKit }) {
if ExtensionPointManager.shared.isRedditEnabled {
alertController.addAction(addRedditFeedAction)
}
if ExtensionPointManager.shared.isTwitterEnabled {
alertController.addAction(addTwitterFeedAction)
}
}
alertController.addAction(addWebFolderAction)
alertController.addAction(cancelAction)
alertController.popoverPresentationController?.barButtonItem = sender
present(alertController, animated: true)
}
}
@objc func toggleSectionHeader(_ sender: UITapGestureRecognizer) {
guard let headerView = sender.view as? MasterFeedTableViewSectionHeader else {
return
}
toggle(headerView)
}
@objc func refreshAccounts(_ sender: Any) {
refreshControl?.endRefreshing()
// This is a hack to make sure that an error dialog doesn't interfere with dismissing the refreshControl.
// If the error dialog appears too closely to the call to endRefreshing, then the refreshControl never disappears.
DispatchQueue.main.asyncAfter(deadline: .now() + 0.5) {
appDelegate.manualRefresh(errorHandler: ErrorHandler.present(self))
}
}
// MARK: Keyboard shortcuts
@objc func selectNextUp(_ sender: Any?) {
coordinator.selectPrevFeed()
}
@objc func selectNextDown(_ sender: Any?) {
coordinator.selectNextFeed()
}
@objc func navigateToTimeline(_ sender: Any?) {
coordinator.navigateToTimeline()
}
@objc func openInBrowser(_ sender: Any?) {
coordinator.showBrowserForCurrentFeed()
}
@objc override func delete(_ sender: Any?) {
if let indexPath = coordinator.currentFeedIndexPath {
delete(indexPath: indexPath)
}
}
@objc func expandSelectedRows(_ sender: Any?) {
if let indexPath = coordinator.currentFeedIndexPath, let containerID = dataSource.itemIdentifier(for: indexPath)?.containerID {
coordinator.expand(containerID)
self.applyChanges(animated: true) {
self.reloadAllVisibleCells()
}
}
}
@objc func collapseSelectedRows(_ sender: Any?) {
if let indexPath = coordinator.currentFeedIndexPath, let containerID = dataSource.itemIdentifier(for: indexPath)?.containerID {
coordinator.collapse(containerID)
self.applyChanges(animated: true) {
self.reloadAllVisibleCells()
}
}
}
@objc func expandAll(_ sender: Any?) {
coordinator.expandAllSectionsAndFolders()
self.applyChanges(animated: true) {
self.reloadAllVisibleCells()
}
}
@objc func collapseAllExceptForGroupItems(_ sender: Any?) {
coordinator.collapseAllFolders()
self.applyChanges(animated: true) {
self.reloadAllVisibleCells()
}
}
@objc func markAllAsRead(_ sender: Any) {
guard let indexPath = tableView.indexPathForSelectedRow, let contentView = tableView.cellForRow(at: indexPath)?.contentView else {
return
}
let title = NSLocalizedString("Mark All as Read", comment: "Mark All as Read")
MarkAsReadAlertController.confirm(self, coordinator: coordinator, confirmTitle: title, sourceType: contentView) { [weak self] in
self?.coordinator.markAllAsReadInTimeline()
}
}
@objc func showFeedInspector(_ sender: Any?) {
coordinator.showFeedInspector()
}
// MARK: API
func restoreSelectionIfNecessary(adjustScroll: Bool) {
if let indexPath = coordinator.masterFeedIndexPathForCurrentTimeline() {
if adjustScroll {
tableView.selectRowAndScrollIfNotVisible(at: indexPath, animations: [])
} else {
tableView.selectRow(at: indexPath, animated: false, scrollPosition: .none)
}
}
}
func updateFeedSelection(animations: Animations) {
operationQueue.add(UpdateSelectionOperation(coordinator: coordinator, dataSource: dataSource, tableView: tableView, animations: animations))
}
func reloadFeeds(initialLoad: Bool, completion: (() -> Void)? = nil) {
updateUI()
// We have to reload all the visible cells because if we got here by doing a table cell move,
// then the table itself is in a weird state. This is because we do unusual things like allowing
// drops on a "folder" that should cause the dropped cell to disappear.
applyChanges(animated: !initialLoad) { [weak self] in
if !initialLoad {
self?.reloadAllVisibleCells(completion: completion)
} else {
completion?()
}
}
}
func updateUI() {
if coordinator.isReadFeedsFiltered {
setFilterButtonToActive()
} else {
setFilterButtonToInactive()
}
refreshProgressView?.update()
addNewItemButton?.isEnabled = !AccountManager.shared.activeAccounts.isEmpty
configureContextMenu()
}
@objc
func configureContextMenu(_: Any? = nil) {
if #available(iOS 14.0, *) {
/*
Context Menu Order:
1. Add Web Feed
2. Add Reddit Feed
3. Add Twitter Feed
4. Add Folder
*/
var menuItems: [UIAction] = []
let addWebFeedActionTitle = NSLocalizedString("Add Web Feed", comment: "Add Web Feed")
let addWebFeedAction = UIAction(title: addWebFeedActionTitle, image: AppAssets.plus) { _ in
self.coordinator.showAddWebFeed()
}
menuItems.append(addWebFeedAction)
if AccountManager.shared.activeAccounts.contains(where: { $0.type == .onMyMac || $0.type == .cloudKit }) {
if ExtensionPointManager.shared.isRedditEnabled {
let addRedditFeedActionTitle = NSLocalizedString("Add Reddit Feed", comment: "Add Reddit Feed")
let addRedditFeedAction = UIAction(title: addRedditFeedActionTitle, image: AppAssets.contextMenuReddit.tinted(color: .label)) { _ in
self.coordinator.showAddRedditFeed()
}
menuItems.append(addRedditFeedAction)
}
if ExtensionPointManager.shared.isTwitterEnabled {
let addTwitterFeedActionTitle = NSLocalizedString("Add Twitter Feed", comment: "Add Twitter Feed")
let addTwitterFeedAction = UIAction(title: addTwitterFeedActionTitle, image: AppAssets.contextMenuTwitter.tinted(color: .label)) { _ in
self.coordinator.showAddTwitterFeed()
}
menuItems.append(addTwitterFeedAction)
}
}
let addWebFolderActionTitle = NSLocalizedString("Add Folder", comment: "Add Folder")
let addWebFolderAction = UIAction(title: addWebFolderActionTitle, image: AppAssets.folderOutlinePlus) { _ in
self.coordinator.showAddFolder()
}
menuItems.append(addWebFolderAction)
let contextMenu = UIMenu(title: NSLocalizedString("Add Item", comment: "Add Item"), image: nil, identifier: nil, options: [], children: menuItems.reversed())
self.addNewItemButton.menu = contextMenu
}
}
func focus() {
becomeFirstResponder()
}
func openInAppBrowser() {
if let indexPath = coordinator.currentFeedIndexPath,
let url = coordinator.homePageURLForFeed(indexPath) {
let vc = SFSafariViewController(url: url)
present(vc, animated: true)
}
}
}
// MARK: UIContextMenuInteractionDelegate
extension MasterFeedViewController: UIContextMenuInteractionDelegate {
func contextMenuInteraction(_ interaction: UIContextMenuInteraction, configurationForMenuAtLocation location: CGPoint) -> UIContextMenuConfiguration? {
guard let sectionIndex = interaction.view?.tag,
let sectionNode = coordinator.rootNode.childAtIndex(sectionIndex),
let account = sectionNode.representedObject as? Account
else {
return nil
}
return UIContextMenuConfiguration(identifier: sectionIndex as NSCopying, previewProvider: nil) { suggestedActions in
var menuElements = [UIMenuElement]()
menuElements.append(UIMenu(title: "", options: .displayInline, children: [self.getAccountInfoAction(account: account)]))
if let markAllAction = self.markAllAsReadAction(account: account, contentView: interaction.view) {
menuElements.append(UIMenu(title: "", options: .displayInline, children: [markAllAction]))
}
menuElements.append(UIMenu(title: "", options: .displayInline, children: [self.deactivateAccountAction(account: account)]))
return UIMenu(title: "", children: menuElements)
}
}
func contextMenuInteraction(_ interaction: UIContextMenuInteraction, previewForHighlightingMenuWithConfiguration configuration: UIContextMenuConfiguration) -> UITargetedPreview? {
guard let sectionIndex = configuration.identifier as? Int,
let cell = tableView.headerView(forSection: sectionIndex) else {
return nil
}
return UITargetedPreview(view: cell, parameters: CroppingPreviewParameters(view: cell))
}
}
// MARK: MasterFeedTableViewSectionHeaderDelegate
extension MasterFeedViewController: MasterFeedTableViewSectionHeaderDelegate {
func masterFeedTableViewSectionHeaderDisclosureDidToggle(_ sender: MasterFeedTableViewSectionHeader) {
toggle(sender)
}
}
// MARK: MasterTableViewCellDelegate
extension MasterFeedViewController: MasterFeedTableViewCellDelegate {
func masterFeedTableViewCellDisclosureDidToggle(_ sender: MasterFeedTableViewCell, expanding: Bool) {
if expanding {
expand(sender)
} else {
collapse(sender)
}
}
}
// MARK: Private
private extension MasterFeedViewController {
func configureToolbar() {
guard let refreshProgressView = Bundle.main.loadNibNamed("RefreshProgressView", owner: self, options: nil)?[0] as? RefreshProgressView else {
return
}
self.refreshProgressView = refreshProgressView
let refreshProgressItemButton = UIBarButtonItem(customView: refreshProgressView)
toolbarItems?.insert(refreshProgressItemButton, at: 2)
}
func setFilterButtonToActive() {
filterButton?.image = AppAssets.filterActiveImage
filterButton?.accLabelText = NSLocalizedString("Selected - Filter Read Feeds", comment: "Selected - Filter Read Feeds")
}
func setFilterButtonToInactive() {
filterButton?.image = AppAssets.filterInactiveImage
filterButton?.accLabelText = NSLocalizedString("Filter Read Feeds", comment: "Filter Read Feeds")
}
func makeIdentifier(_ node: Node) -> MasterFeedTableViewIdentifier {
let unreadCount = coordinator.unreadCountFor(node)
return MasterFeedTableViewIdentifier(node: node, unreadCount: unreadCount)
}
func reload(_ identifier: MasterFeedTableViewIdentifier) {
var snapshot = dataSource.snapshot()
snapshot.reloadItems([identifier])
queueApply(snapshot: snapshot, animatingDifferences: false) { [weak self] in
self?.restoreSelectionIfNecessary(adjustScroll: false)
}
}
func applyChanges(animated: Bool, adjustScroll: Bool = false, completion: (() -> Void)? = nil) {
var snapshot = NSDiffableDataSourceSnapshot<Int, MasterFeedTableViewIdentifier>()
let sectionIdentifiers = Array(0...coordinator.rootNode.childNodes.count - 1)
snapshot.appendSections(sectionIdentifiers)
for sectionIdentifer in sectionIdentifiers {
let identifiers = coordinator.shadowNodesFor(section: sectionIdentifer).map { makeIdentifier($0) }
snapshot.appendItems(identifiers, toSection: sectionIdentifer)
}
queueApply(snapshot: snapshot, animatingDifferences: animated) { [weak self] in
self?.restoreSelectionIfNecessary(adjustScroll: adjustScroll)
completion?()
}
}
func queueApply(snapshot: NSDiffableDataSourceSnapshot<Int, MasterFeedTableViewIdentifier>, animatingDifferences: Bool = true, completion: (() -> Void)? = nil) {
let operation = MasterFeedDataSourceOperation(dataSource: dataSource, snapshot: snapshot, animating: animatingDifferences)
operation.completionBlock = { [weak self] _ in
self?.enableTableViewSelection()
completion?()
}
disableTableViewSelectionIfNecessary()
operationQueue.add(operation)
}
private func disableTableViewSelectionIfNecessary() {
// We only need to disable tableView selection if the feeds are filtered by unread
guard coordinator.isReadFeedsFiltered else { return }
tableView.allowsSelection = false
}
private func enableTableViewSelection() {
tableView.allowsSelection = true
}
func makeDataSource() -> MasterFeedDataSource {
let dataSource = MasterFeedDataSource(tableView: tableView, cellProvider: { [weak self] tableView, indexPath, cellContents in
let cell = tableView.dequeueReusableCell(withIdentifier: "Cell", for: indexPath) as! MasterFeedTableViewCell
self?.configure(cell, cellContents)
return cell
})
dataSource.defaultRowAnimation = .middle
return dataSource
}
func resetEstimatedRowHeight() {
let titleLabel = NonIntrinsicLabel()
titleLabel.text = "But I must explain"
let unreadCountView = MasterFeedUnreadCountView()
unreadCountView.unreadCount = 10
let layout = MasterFeedTableViewCellLayout(cellWidth: tableView.bounds.size.width, insets: tableView.safeAreaInsets, label: titleLabel, unreadCountView: unreadCountView, showingEditingControl: false, indent: false, shouldShowDisclosure: false)
tableView.estimatedRowHeight = layout.height
}
func configure(_ cell: MasterFeedTableViewCell, _ identifier: MasterFeedTableViewIdentifier) {
cell.delegate = self
if identifier.isFolder {
cell.indentationLevel = 0
} else {
cell.indentationLevel = 1
}
if let containerID = identifier.containerID {
cell.setDisclosure(isExpanded: coordinator.isExpanded(containerID), animated: false)
cell.isDisclosureAvailable = true
} else {
cell.isDisclosureAvailable = false
}
cell.name = identifier.nameForDisplay
cell.unreadCount = identifier.unreadCount
configureIcon(cell, identifier)
guard let indexPath = dataSource.indexPath(for: identifier) else { return }
let rowsInSection = tableView.numberOfRows(inSection: indexPath.section)
if indexPath.row == rowsInSection - 1 {
cell.isSeparatorShown = false
} else {
cell.isSeparatorShown = true
}
}
func configureIcon(_ cell: MasterFeedTableViewCell, _ identifier: MasterFeedTableViewIdentifier) {
cell.iconImage = imageFor(identifier)
}
func imageFor(_ identifier: MasterFeedTableViewIdentifier) -> IconImage? {
guard let feedID = identifier.feedID else { return nil }
if let smartFeed = SmartFeedsController.shared.find(by: feedID) {
return imageForSmartFeed(smartFeed, feedID)
}
guard let feed = AccountManager.shared.existingFeed(with: feedID) else { return nil }
if let webFeed = feed as? WebFeed, let iconImage = imageForWebFeed(webFeed, feedID) {
return iconImage
}
if let smallIconProvider = feed as? SmallIconProvider, let iconImage = imageForSmallIconProvider(smallIconProvider, feedID) {
return iconImage
}
return nil
}
func imageForSmartFeed(_ smartFeed: PseudoFeed, _ feedID: FeedIdentifier) -> IconImage? {
if let iconImage = smartFeedIconImageCache[feedID] {
return iconImage
}
if let iconImage = smartFeed.smallIcon {
smartFeedIconImageCache[feedID] = iconImage
return iconImage
}
return nil
}
func imageForWebFeed(_ webFeed: WebFeed, _ feedID: FeedIdentifier) -> IconImage? {
if let iconImage = webFeedIconImageCache[feedID] {
return iconImage
}
if let iconImage = appDelegate.webFeedIconDownloader.icon(for: webFeed) {
webFeedIconImageCache[feedID] = iconImage
return iconImage
}
if let faviconImage = faviconImageCache[feedID] {
return faviconImage
}
if let faviconImage = appDelegate.faviconDownloader.faviconAsIcon(for: webFeed) {
faviconImageCache[feedID] = faviconImage
return faviconImage
}
return nil
}
func imageForSmallIconProvider(_ provider: SmallIconProvider, _ feedID: FeedIdentifier) -> IconImage? {
if let iconImage = smallIconImageCache[feedID] {
return iconImage
}
if let iconImage = provider.smallIcon {
smallIconImageCache[feedID] = iconImage
return iconImage
}
return nil
}
func nameFor(_ node: Node) -> String {
if let displayNameProvider = node.representedObject as? DisplayNameProvider {
return displayNameProvider.nameForDisplay
}
return ""
}
func configureCellsForRepresentedObject(_ representedObject: AnyObject) {
applyToCellsForRepresentedObject(representedObject, configure)
}
func applyToCellsForRepresentedObject(_ representedObject: AnyObject, _ completion: (MasterFeedTableViewCell, MasterFeedTableViewIdentifier) -> Void) {
applyToAvailableCells { (cell, identifier) in
if let representedFeed = representedObject as? Feed, representedFeed.feedID == identifier.feedID {
completion(cell, identifier)
}
}
}
func applyToAvailableCells(_ completion: (MasterFeedTableViewCell, MasterFeedTableViewIdentifier) -> Void) {
tableView.visibleCells.forEach { cell in
guard let indexPath = tableView.indexPath(for: cell), let identifier = dataSource.itemIdentifier(for: indexPath) else {
return
}
completion(cell as! MasterFeedTableViewCell, identifier)
}
}
private func reloadAllVisibleCells(completion: (() -> Void)? = nil) {
let visibleNodes = tableView.indexPathsForVisibleRows!.compactMap { return dataSource.itemIdentifier(for: $0) }
reloadCells(visibleNodes, completion: completion)
}
private func reloadCells(_ identifiers: [MasterFeedTableViewIdentifier], completion: (() -> Void)? = nil) {
var snapshot = dataSource.snapshot()
snapshot.reloadItems(identifiers)
queueApply(snapshot: snapshot, animatingDifferences: false) { [weak self] in
self?.restoreSelectionIfNecessary(adjustScroll: false)
completion?()
}
}
private func accountForNode(_ node: Node) -> Account? {
if let account = node.representedObject as? Account {
return account
}
if let folder = node.representedObject as? Folder {
return folder.account
}
if let feed = node.representedObject as? WebFeed {
return feed.account
}
return nil
}
func toggle(_ headerView: MasterFeedTableViewSectionHeader) {
guard let sectionNode = coordinator.rootNode.childAtIndex(headerView.tag) else {
return
}
if coordinator.isExpanded(sectionNode) {
headerView.disclosureExpanded = false
coordinator.collapse(sectionNode)
self.applyChanges(animated: true)
} else {
headerView.disclosureExpanded = true
coordinator.expand(sectionNode)
self.applyChanges(animated: true)
}
}
func expand(_ cell: MasterFeedTableViewCell) {
guard let indexPath = tableView.indexPath(for: cell), let containerID = dataSource.itemIdentifier(for: indexPath)?.containerID else {
return
}
coordinator.expand(containerID)
applyChanges(animated: true)
}
func collapse(_ cell: MasterFeedTableViewCell) {
guard let indexPath = tableView.indexPath(for: cell), let containerID = dataSource.itemIdentifier(for: indexPath)?.containerID else {
return
}
coordinator.collapse(containerID)
applyChanges(animated: true)
}
func makeWebFeedContextMenu(identifier: MasterFeedTableViewIdentifier, indexPath: IndexPath, includeDeleteRename: Bool) -> UIContextMenuConfiguration {
return UIContextMenuConfiguration(identifier: identifier as NSCopying, previewProvider: nil, actionProvider: { [ weak self] suggestedActions in
guard let self = self else { return nil }
var menuElements = [UIMenuElement]()
if let inspectorAction = self.getInfoAction(indexPath: indexPath) {
menuElements.append(UIMenu(title: "", options: .displayInline, children: [inspectorAction]))
}
if let homePageAction = self.homePageAction(indexPath: indexPath) {
menuElements.append(UIMenu(title: "", options: .displayInline, children: [homePageAction]))
}
var pageActions = [UIAction]()
if let copyFeedPageAction = self.copyFeedPageAction(indexPath: indexPath) {
pageActions.append(copyFeedPageAction)
}
if let copyHomePageAction = self.copyHomePageAction(indexPath: indexPath) {
pageActions.append(copyHomePageAction)
}
if !pageActions.isEmpty {
menuElements.append(UIMenu(title: "", options: .displayInline, children: pageActions))
}
if let markAllAction = self.markAllAsReadAction(indexPath: indexPath) {
menuElements.append(UIMenu(title: "", options: .displayInline, children: [markAllAction]))
}
if includeDeleteRename {
menuElements.append(UIMenu(title: "",
options: .displayInline,
children: [
self.renameAction(indexPath: indexPath),
self.deleteAction(indexPath: indexPath)
]))
}
return UIMenu(title: "", children: menuElements)
})
}
func makeFolderContextMenu(identifier: MasterFeedTableViewIdentifier, indexPath: IndexPath) -> UIContextMenuConfiguration {
return UIContextMenuConfiguration(identifier: identifier as NSCopying, previewProvider: nil, actionProvider: { [weak self] suggestedActions in
guard let self = self else { return nil }
var menuElements = [UIMenuElement]()
if let markAllAction = self.markAllAsReadAction(indexPath: indexPath) {
menuElements.append(UIMenu(title: "", options: .displayInline, children: [markAllAction]))
}
menuElements.append(UIMenu(title: "",
options: .displayInline,
children: [
self.renameAction(indexPath: indexPath),
self.deleteAction(indexPath: indexPath)
]))
return UIMenu(title: "", children: menuElements)
})
}
func makePseudoFeedContextMenu(identifier: MasterFeedTableViewIdentifier, indexPath: IndexPath) -> UIContextMenuConfiguration? {
guard let markAllAction = self.markAllAsReadAction(indexPath: indexPath) else {
return nil
}
return UIContextMenuConfiguration(identifier: identifier as NSCopying, previewProvider: nil, actionProvider: { suggestedActions in
return UIMenu(title: "", children: [markAllAction])
})
}
func homePageAction(indexPath: IndexPath) -> UIAction? {
guard coordinator.homePageURLForFeed(indexPath) != nil else {
return nil
}
let title = NSLocalizedString("Open Home Page", comment: "Open Home Page")
let action = UIAction(title: title, image: AppAssets.safariImage) { [weak self] action in
self?.coordinator.showBrowserForFeed(indexPath)
}
return action
}
func homePageAlertAction(indexPath: IndexPath, completion: @escaping (Bool) -> Void) -> UIAlertAction? {
guard coordinator.homePageURLForFeed(indexPath) != nil else {
return nil
}
let title = NSLocalizedString("Open Home Page", comment: "Open Home Page")
let action = UIAlertAction(title: title, style: .default) { [weak self] action in
self?.coordinator.showBrowserForFeed(indexPath)
completion(true)
}
return action
}
func copyFeedPageAction(indexPath: IndexPath) -> UIAction? {
guard let feedID = dataSource.itemIdentifier(for: indexPath)?.feedID,
let webFeed = AccountManager.shared.existingFeed(with: feedID) as? WebFeed,
let url = URL(string: webFeed.url) else {
return nil
}
let title = NSLocalizedString("Copy Feed URL", comment: "Copy Feed URL")
let action = UIAction(title: title, image: AppAssets.copyImage) { action in
UIPasteboard.general.url = url
}
return action
}
func copyFeedPageAlertAction(indexPath: IndexPath, completion: @escaping (Bool) -> Void) -> UIAlertAction? {
guard let feedID = dataSource.itemIdentifier(for: indexPath)?.feedID,
let webFeed = AccountManager.shared.existingFeed(with: feedID) as? WebFeed,
let url = URL(string: webFeed.url) else {
return nil
}
let title = NSLocalizedString("Copy Feed URL", comment: "Copy Feed URL")
let action = UIAlertAction(title: title, style: .default) { action in
UIPasteboard.general.url = url
completion(true)
}
return action
}
func copyHomePageAction(indexPath: IndexPath) -> UIAction? {
guard let feedID = dataSource.itemIdentifier(for: indexPath)?.feedID,
let webFeed = AccountManager.shared.existingFeed(with: feedID) as? WebFeed,
let homePageURL = webFeed.homePageURL,
let url = URL(string: homePageURL) else {
return nil
}
let title = NSLocalizedString("Copy Home Page URL", comment: "Copy Home Page URL")
let action = UIAction(title: title, image: AppAssets.copyImage) { action in
UIPasteboard.general.url = url
}
return action
}
func copyHomePageAlertAction(indexPath: IndexPath, completion: @escaping (Bool) -> Void) -> UIAlertAction? {
guard let feedID = dataSource.itemIdentifier(for: indexPath)?.feedID,
let webFeed = AccountManager.shared.existingFeed(with: feedID) as? WebFeed,
let homePageURL = webFeed.homePageURL,
let url = URL(string: homePageURL) else {
return nil
}
let title = NSLocalizedString("Copy Home Page URL", comment: "Copy Home Page URL")
let action = UIAlertAction(title: title, style: .default) { action in
UIPasteboard.general.url = url
completion(true)
}
return action
}
func markAllAsReadAlertAction(indexPath: IndexPath, completion: @escaping (Bool) -> Void) -> UIAlertAction? {
guard let identifier = dataSource.itemIdentifier(for: indexPath),
identifier.unreadCount > 0,
let feedID = identifier.feedID,
let feed = AccountManager.shared.existingFeed(with: feedID) as? WebFeed,
let articles = try? feed.fetchArticles(), let contentView = self.tableView.cellForRow(at: indexPath)?.contentView else {
return nil
}
let localizedMenuText = NSLocalizedString("Mark All as Read in “%@”", comment: "Command")
let title = NSString.localizedStringWithFormat(localizedMenuText as NSString, feed.nameForDisplay) as String
let cancel = {
completion(true)
}
let action = UIAlertAction(title: title, style: .default) { [weak self] action in
MarkAsReadAlertController.confirm(self, coordinator: self?.coordinator, confirmTitle: title, sourceType: contentView, cancelCompletion: cancel) { [weak self] in
self?.coordinator.markAllAsRead(Array(articles))
completion(true)
}
}
return action
}
func deleteAction(indexPath: IndexPath) -> UIAction {
let title = NSLocalizedString("Delete", comment: "Delete")
let action = UIAction(title: title, image: AppAssets.trashImage, attributes: .destructive) { [weak self] action in
self?.delete(indexPath: indexPath)
}
return action
}
func renameAction(indexPath: IndexPath) -> UIAction {
let title = NSLocalizedString("Rename", comment: "Rename")
let action = UIAction(title: title, image: AppAssets.editImage) { [weak self] action in
self?.rename(indexPath: indexPath)
}
return action
}
func getInfoAction(indexPath: IndexPath) -> UIAction? {
guard let feedID = dataSource.itemIdentifier(for: indexPath)?.feedID, let feed = AccountManager.shared.existingFeed(with: feedID) as? WebFeed else {
return nil
}
let title = NSLocalizedString("Get Info", comment: "Get Info")
let action = UIAction(title: title, image: AppAssets.infoImage) { [weak self] action in
self?.coordinator.showFeedInspector(for: feed)
}
return action
}
func getAccountInfoAction(account: Account) -> UIAction {
let title = NSLocalizedString("Get Info", comment: "Get Info")
let action = UIAction(title: title, image: AppAssets.infoImage) { [weak self] action in
self?.coordinator.showAccountInspector(for: account)
}
return action
}
func deactivateAccountAction(account: Account) -> UIAction {
let title = NSLocalizedString("Deactivate", comment: "Deactivate")
let action = UIAction(title: title, image: AppAssets.deactivateImage) { action in
account.isActive = false
}
return action
}
func getInfoAlertAction(indexPath: IndexPath, completion: @escaping (Bool) -> Void) -> UIAlertAction? {
guard let feedID = dataSource.itemIdentifier(for: indexPath)?.feedID, let feed = AccountManager.shared.existingFeed(with: feedID) as? WebFeed else {
return nil
}
let title = NSLocalizedString("Get Info", comment: "Get Info")
let action = UIAlertAction(title: title, style: .default) { [weak self] action in
self?.coordinator.showFeedInspector(for: feed)
completion(true)
}
return action
}
func markAllAsReadAction(indexPath: IndexPath) -> UIAction? {
guard let identifier = dataSource.itemIdentifier(for: indexPath), identifier.unreadCount > 0 else {
return nil
}
var smartFeed: Feed?
if identifier.isPsuedoFeed {
if SmartFeedsController.shared.todayFeed.feedID == identifier.feedID {
smartFeed = SmartFeedsController.shared.todayFeed
} else if SmartFeedsController.shared.unreadFeed.feedID == identifier.feedID {
smartFeed = SmartFeedsController.shared.unreadFeed
} else if SmartFeedsController.shared.starredFeed.feedID == identifier.feedID {
smartFeed = SmartFeedsController.shared.starredFeed
}
}
guard let feedID = identifier.feedID,
let feed = smartFeed ?? AccountManager.shared.existingFeed(with: feedID),
feed.unreadCount > 0,
let contentView = self.tableView.cellForRow(at: indexPath)?.contentView else {
return nil
}
let localizedMenuText = NSLocalizedString("Mark All as Read in “%@”", comment: "Command")
let title = NSString.localizedStringWithFormat(localizedMenuText as NSString, feed.nameForDisplay) as String
let action = UIAction(title: title, image: AppAssets.markAllAsReadImage) { [weak self] action in
MarkAsReadAlertController.confirm(self, coordinator: self?.coordinator, confirmTitle: title, sourceType: contentView) { [weak self] in
if let articles = try? feed.fetchUnreadArticles() {
self?.coordinator.markAllAsRead(Array(articles))
}
}
}
return action
}
func markAllAsReadAction(account: Account, contentView: UIView?) -> UIAction? {
guard account.unreadCount > 0, let contentView = contentView else {
return nil
}
let localizedMenuText = NSLocalizedString("Mark All as Read in “%@”", comment: "Command")
let title = NSString.localizedStringWithFormat(localizedMenuText as NSString, account.nameForDisplay) as String
let action = UIAction(title: title, image: AppAssets.markAllAsReadImage) { [weak self] action in
MarkAsReadAlertController.confirm(self, coordinator: self?.coordinator, confirmTitle: title, sourceType: contentView) { [weak self] in
if let articles = try? account.fetchArticles(.unread()) {
self?.coordinator.markAllAsRead(Array(articles))
}
}
}
return action
}
func rename(indexPath: IndexPath) {
guard let feedID = dataSource.itemIdentifier(for: indexPath)?.feedID, let feed = AccountManager.shared.existingFeed(with: feedID) else { return }
let name = dataSource.itemIdentifier(for: indexPath)?.nameForDisplay ?? ""
let formatString = NSLocalizedString("Rename “%@”", comment: "Rename feed")
let title = NSString.localizedStringWithFormat(formatString as NSString, name) as String
let alertController = UIAlertController(title: title, message: nil, preferredStyle: .alert)
let cancelTitle = NSLocalizedString("Cancel", comment: "Cancel")
alertController.addAction(UIAlertAction(title: cancelTitle, style: .cancel))
let renameTitle = NSLocalizedString("Rename", comment: "Rename")
let renameAction = UIAlertAction(title: renameTitle, style: .default) { [weak self] action in
guard let name = alertController.textFields?[0].text, !name.isEmpty else {
return
}
if let webFeed = feed as? WebFeed {
webFeed.rename(to: name) { result in
switch result {
case .success:
break
case .failure(let error):
self?.presentError(error)
}
}
} else if let folder = feed as? Folder {
folder.rename(to: name) { result in
switch result {
case .success:
break
case .failure(let error):
self?.presentError(error)
}
}
}
}
alertController.addAction(renameAction)
alertController.preferredAction = renameAction
alertController.addTextField() { textField in
textField.text = name
textField.placeholder = NSLocalizedString("Name", comment: "Name")
}
self.present(alertController, animated: true) {
}
}
func delete(indexPath: IndexPath) {
guard let feedID = dataSource.itemIdentifier(for: indexPath)?.feedID, let feed = AccountManager.shared.existingFeed(with: feedID) else { return }
let title: String
let message: String
if feed is Folder {
title = NSLocalizedString("Delete Folder", comment: "Delete folder")
let localizedInformativeText = NSLocalizedString("Are you sure you want to delete the “%@” folder?", comment: "Folder delete text")
message = NSString.localizedStringWithFormat(localizedInformativeText as NSString, feed.nameForDisplay) as String
} else {
title = NSLocalizedString("Delete Feed", comment: "Delete feed")
let localizedInformativeText = NSLocalizedString("Are you sure you want to delete the “%@” feed?", comment: "Feed delete text")
message = NSString.localizedStringWithFormat(localizedInformativeText as NSString, feed.nameForDisplay) as String
}
let alertController = UIAlertController(title: title, message: message, preferredStyle: .alert)
let cancelTitle = NSLocalizedString("Cancel", comment: "Cancel")
alertController.addAction(UIAlertAction(title: cancelTitle, style: .cancel))
let deleteTitle = NSLocalizedString("Delete", comment: "Delete")
let deleteAction = UIAlertAction(title: deleteTitle, style: .default) { [weak self] action in
self?.delete(indexPath: indexPath, feedID: feedID)
}
alertController.addAction(deleteAction)
alertController.preferredAction = deleteAction
self.present(alertController, animated: true)
}
func delete(indexPath: IndexPath, feedID: FeedIdentifier) {
guard let undoManager = undoManager,
let deleteNode = coordinator.nodeFor(feedID: feedID),
let deleteCommand = DeleteCommand(nodesToDelete: [deleteNode], undoManager: undoManager, errorHandler: ErrorHandler.present(self)) else {
return
}
if let folder = deleteNode.representedObject as? Folder {
ActivityManager.cleanUp(folder)
} else if let feed = deleteNode.representedObject as? WebFeed {
ActivityManager.cleanUp(feed)
}
pushUndoableCommand(deleteCommand)
deleteCommand.perform()
if indexPath == coordinator.currentFeedIndexPath {
coordinator.selectFeed(indexPath: nil)
}
}
}
extension MasterFeedViewController: UIGestureRecognizerDelegate {
func gestureRecognizerShouldBegin(_ gestureRecognizer: UIGestureRecognizer) -> Bool {
guard let gestureRecognizer = gestureRecognizer as? UIPanGestureRecognizer else {
return false
}
let velocity = gestureRecognizer.velocity(in: self.view)
return abs(velocity.x) > abs(velocity.y);
}
}