NetNewsWire/iOS/SceneCoordinator.swift

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//
// NavigationModelController.swift
// NetNewsWire-iOS
//
// Created by Maurice Parker on 4/21/19.
// Copyright © 2019 Ranchero Software. All rights reserved.
//
import UIKit
import UserNotifications
import Account
import Articles
import RSCore
import RSTree
import SafariServices
enum PanelMode {
case unset
case three
case standard
}
enum SearchScope: Int {
case timeline = 0
case global = 1
}
enum ShowFeedName {
case none
case byline
case feed
}
class SceneCoordinator: NSObject, UndoableCommandRunner, UnreadCountProvider {
var undoableCommands = [UndoableCommand]()
var undoManager: UndoManager? {
return rootSplitViewController.undoManager
}
lazy var webViewProvider = WebViewProvider(coordinator: self)
private var panelMode: PanelMode = .unset
private var activityManager = ActivityManager()
private var rootSplitViewController: RootSplitViewController!
private var masterNavigationController: UINavigationController!
private var masterFeedViewController: MasterFeedViewController!
private var masterTimelineViewController: MasterTimelineViewController?
private var subSplitViewController: UISplitViewController?
private var articleViewController: ArticleViewController? {
if let detail = masterNavigationController.viewControllers.last as? ArticleViewController {
return detail
}
if let subSplit = subSplitViewController {
if let navController = subSplit.viewControllers.last as? UINavigationController {
return navController.topViewController as? ArticleViewController
}
} else {
if let navController = rootSplitViewController.viewControllers.last as? UINavigationController {
return navController.topViewController as? ArticleViewController
}
}
return nil
}
private var wasRootSplitViewControllerCollapsed = false
private let fetchAndMergeArticlesQueue = CoalescingQueue(name: "Fetch and Merge Articles", interval: 0.5)
private let rebuildBackingStoresQueue = CoalescingQueue(name: "Rebuild The Backing Stores", interval: 0.5)
private var fetchSerialNumber = 0
private let fetchRequestQueue = FetchRequestQueue()
private var expandedTable = Set<ContainerIdentifier>()
private var readFilterEnabledTable = [FeedIdentifier: Bool]()
private var shadowTable = [[Node]]()
private(set) var preSearchTimelineFeed: Feed?
private var lastSearchString = ""
private var lastSearchScope: SearchScope? = nil
private var isSearching: Bool = false
private var savedSearchArticles: ArticleArray? = nil
private var savedSearchArticleIds: Set<String>? = nil
var isTimelineViewControllerPending = false
var isArticleViewControllerPending = false
private(set) var sortDirection = AppDefaults.shared.timelineSortDirection {
didSet {
if sortDirection != oldValue {
sortParametersDidChange()
}
}
}
private(set) var groupByFeed = AppDefaults.shared.timelineGroupByFeed {
didSet {
if groupByFeed != oldValue {
sortParametersDidChange()
}
}
}
var prefersStatusBarHidden = false
private let treeControllerDelegate = WebFeedTreeControllerDelegate()
private let treeController: TreeController
var stateRestorationActivity: NSUserActivity {
let activity = activityManager.stateRestorationActivity
var userInfo = activity.userInfo ?? [AnyHashable: Any]()
userInfo[UserInfoKey.windowState] = windowState()
let articleState = articleViewController?.currentState
userInfo[UserInfoKey.isShowingExtractedArticle] = articleState?.isShowingExtractedArticle ?? false
userInfo[UserInfoKey.articleWindowScrollY] = articleState?.windowScrollY ?? 0
activity.userInfo = userInfo
return activity
}
var isRootSplitCollapsed: Bool {
return rootSplitViewController.isCollapsed
}
var isThreePanelMode: Bool {
return panelMode == .three
}
var isReadFeedsFiltered: Bool {
return treeControllerDelegate.isReadFiltered
}
var isReadArticlesFiltered: Bool {
if let feedID = timelineFeed?.feedID, let readFilterEnabled = readFilterEnabledTable[feedID] {
return readFilterEnabled
} else {
return timelineDefaultReadFilterType != .none
}
}
var timelineDefaultReadFilterType: ReadFilterType {
return timelineFeed?.defaultReadFilterType ?? .none
}
var rootNode: Node {
return treeController.rootNode
}
// At some point we should refactor the current Feed IndexPath out and only use the timeline feed
private(set) var currentFeedIndexPath: IndexPath?
var timelineIconImage: IconImage? {
guard let timelineFeed = timelineFeed else {
return nil
}
return IconImageCache.shared.imageForFeed(timelineFeed)
}
private var exceptionArticleFetcher: ArticleFetcher?
private(set) var timelineFeed: Feed?
// We have to defer the selecting of the feed and article due to a behavior (bug?) in iOS 15.
// iOS 15 will crash if you are in landscape on an iPad and are restoring article state. We
// have no idea why this is, but it happens when you do a select on a UITableView right before
// doing a diffable datasource apply.
//
// Steps to recreate:
//
// * Try to relaunch the app in the sim.
// * Press the Stop button in Xcode
// * Wait for all the app suspension activities to complete (widget data, etc)
// * Once the article has loaded, navigate to the iPad home screen
// * While in landscape, select a feed and then select an article
// * Install a fresh build of NNW to an iPad simulator (11 or 12.9' will do) running iPadOS 15
private var deferredFeedAndArticleSelect: (feedIdentifier: FeedIdentifier, articleID: String, isShowingExtractedArticle: Bool, articleWindowScrollY: Int)?
var timelineMiddleIndexPath: IndexPath?
private(set) var showFeedNames = ShowFeedName.none
private(set) var showIcons = false
var prevFeedIndexPath: IndexPath? {
guard let indexPath = currentFeedIndexPath else {
return nil
}
let prevIndexPath: IndexPath? = {
if indexPath.row - 1 < 0 {
for i in (0..<indexPath.section).reversed() {
if shadowTable[i].count > 0 {
return IndexPath(row: shadowTable[i].count - 1, section: i)
}
}
return nil
} else {
return IndexPath(row: indexPath.row - 1, section: indexPath.section)
}
}()
return prevIndexPath
}
var nextFeedIndexPath: IndexPath? {
guard let indexPath = currentFeedIndexPath else {
return nil
}
let nextIndexPath: IndexPath? = {
if indexPath.row + 1 >= shadowTable[indexPath.section].count {
for i in indexPath.section + 1..<shadowTable.count {
if shadowTable[i].count > 0 {
return IndexPath(row: 0, section: i)
}
}
return nil
} else {
return IndexPath(row: indexPath.row + 1, section: indexPath.section)
}
}()
return nextIndexPath
}
var isPrevArticleAvailable: Bool {
guard let articleRow = currentArticleRow else {
return false
}
return articleRow > 0
}
var isNextArticleAvailable: Bool {
guard let articleRow = currentArticleRow else {
return false
}
return articleRow + 1 < articles.count
}
var prevArticle: Article? {
guard isPrevArticleAvailable, let articleRow = currentArticleRow else {
return nil
}
return articles[articleRow - 1]
}
var nextArticle: Article? {
guard isNextArticleAvailable, let articleRow = currentArticleRow else {
return nil
}
return articles[articleRow + 1]
}
var firstUnreadArticleIndexPath: IndexPath? {
for (row, article) in articles.enumerated() {
if !article.status.read {
return IndexPath(row: row, section: 0)
}
}
return nil
}
var currentArticle: Article?
private(set) var articles = ArticleArray() {
didSet {
timelineMiddleIndexPath = nil
articleDictionaryNeedsUpdate = true
}
}
private var articleDictionaryNeedsUpdate = true
private var _idToArticleDictionary = [String: Article]()
private var idToAticleDictionary: [String: Article] {
if articleDictionaryNeedsUpdate {
rebuildArticleDictionaries()
}
return _idToArticleDictionary
}
private var currentArticleRow: Int? {
guard let article = currentArticle else { return nil }
return articles.firstIndex(of: article)
}
var isTimelineUnreadAvailable: Bool {
return unreadCount > 0
}
var isAnyUnreadAvailable: Bool {
return appDelegate.unreadCount > 0
}
var unreadCount: Int = 0 {
didSet {
if unreadCount != oldValue {
postUnreadCountDidChangeNotification()
}
}
}
override init() {
treeController = TreeController(delegate: treeControllerDelegate)
super.init()
for sectionNode in treeController.rootNode.childNodes {
markExpanded(sectionNode)
shadowTable.append([Node]())
}
NotificationCenter.default.addObserver(self, selector: #selector(unreadCountDidInitialize(_:)), name: .UnreadCountDidInitialize, object: nil)
NotificationCenter.default.addObserver(self, selector: #selector(unreadCountDidChange(_:)), name: .UnreadCountDidChange, object: nil)
NotificationCenter.default.addObserver(self, selector: #selector(statusesDidChange(_:)), name: .StatusesDidChange, object: nil)
NotificationCenter.default.addObserver(self, selector: #selector(containerChildrenDidChange(_:)), name: .ChildrenDidChange, object: nil)
NotificationCenter.default.addObserver(self, selector: #selector(batchUpdateDidPerform(_:)), name: .BatchUpdateDidPerform, object: nil)
NotificationCenter.default.addObserver(self, selector: #selector(displayNameDidChange(_:)), name: .DisplayNameDidChange, object: nil)
NotificationCenter.default.addObserver(self, selector: #selector(accountStateDidChange(_:)), name: .AccountStateDidChange, object: nil)
NotificationCenter.default.addObserver(self, selector: #selector(userDidAddAccount(_:)), name: .UserDidAddAccount, object: nil)
NotificationCenter.default.addObserver(self, selector: #selector(userDidDeleteAccount(_:)), name: .UserDidDeleteAccount, object: nil)
NotificationCenter.default.addObserver(self, selector: #selector(userDidAddFeed(_:)), name: .UserDidAddFeed, object: nil)
NotificationCenter.default.addObserver(self, selector: #selector(userDefaultsDidChange(_:)), name: UserDefaults.didChangeNotification, object: nil)
NotificationCenter.default.addObserver(self, selector: #selector(accountDidDownloadArticles(_:)), name: .AccountDidDownloadArticles, object: nil)
NotificationCenter.default.addObserver(self, selector: #selector(willEnterForeground(_:)), name: UIApplication.willEnterForegroundNotification, object: nil)
NotificationCenter.default.addObserver(self, selector: #selector(importDownloadedTheme(_:)), name: .didEndDownloadingTheme, object: nil)
NotificationCenter.default.addObserver(self, selector: #selector(themeDownloadDidFail(_:)), name: .didFailToImportThemeWithError, object: nil)
}
func start(for size: CGSize) -> UIViewController {
rootSplitViewController = RootSplitViewController()
rootSplitViewController.coordinator = self
rootSplitViewController.preferredDisplayMode = .allVisible
rootSplitViewController.viewControllers = [InteractiveNavigationController.template()]
rootSplitViewController.delegate = self
masterNavigationController = (rootSplitViewController.viewControllers.first as! UINavigationController)
masterNavigationController.delegate = self
masterFeedViewController = UIStoryboard.main.instantiateController(ofType: MasterFeedViewController.self)
masterFeedViewController.coordinator = self
masterNavigationController.pushViewController(masterFeedViewController, animated: false)
let articleViewController = UIStoryboard.main.instantiateController(ofType: ArticleViewController.self)
articleViewController.coordinator = self
let detailNavigationController = addNavControllerIfNecessary(articleViewController, showButton: true)
rootSplitViewController.showDetailViewController(detailNavigationController, sender: self)
configurePanelMode(for: size)
return rootSplitViewController
}
func restoreWindowState(_ activity: NSUserActivity?) {
if let activity = activity, let windowState = activity.userInfo?[UserInfoKey.windowState] as? [AnyHashable: Any] {
if let containerExpandedWindowState = windowState[UserInfoKey.containerExpandedWindowState] as? [[AnyHashable: AnyHashable]] {
let containerIdentifers = containerExpandedWindowState.compactMap( { ContainerIdentifier(userInfo: $0) })
expandedTable = Set(containerIdentifers)
}
if let readArticlesFilterState = windowState[UserInfoKey.readArticlesFilterState] as? [[AnyHashable: AnyHashable]: Bool] {
for key in readArticlesFilterState.keys {
if let feedIdentifier = FeedIdentifier(userInfo: key) {
readFilterEnabledTable[feedIdentifier] = readArticlesFilterState[key]
}
}
}
rebuildBackingStores(initialLoad: true)
// You can't assign the Feeds Read Filter until we've built the backing stores at least once or there is nothing
// for state restoration to work with while we are waiting for the unread counts to initialize.
if let readFeedsFilterState = windowState[UserInfoKey.readFeedsFilterState] as? Bool {
treeControllerDelegate.isReadFiltered = readFeedsFilterState
}
} else {
rebuildBackingStores(initialLoad: true)
}
}
func handle(_ activity: NSUserActivity) {
selectFeed(indexPath: nil) {
guard let activityType = ActivityType(rawValue: activity.activityType) else { return }
switch activityType {
case .restoration:
break
case .selectFeed:
self.handleSelectFeed(activity.userInfo)
case .nextUnread:
self.selectFirstUnreadInAllUnread()
case .readArticle:
self.handleReadArticle(activity.userInfo)
case .addFeedIntent:
self.showAddWebFeed()
}
}
}
func handle(_ response: UNNotificationResponse) {
let userInfo = response.notification.request.content.userInfo
handleReadArticle(userInfo)
}
func configurePanelMode(for size: CGSize) {
guard rootSplitViewController.traitCollection.userInterfaceIdiom == .pad else {
return
}
if (size.width / size.height) > 1.2 {
if panelMode == .unset || panelMode == .standard {
panelMode = .three
configureThreePanelMode()
}
} else {
if panelMode == .unset || panelMode == .three {
panelMode = .standard
configureStandardPanelMode()
}
}
wasRootSplitViewControllerCollapsed = rootSplitViewController.isCollapsed
}
func resetFocus() {
if currentArticle != nil {
masterTimelineViewController?.focus()
} else {
masterFeedViewController?.focus()
}
}
func selectFirstUnreadInAllUnread() {
markExpanded(SmartFeedsController.shared)
self.ensureFeedIsAvailableToSelect(SmartFeedsController.shared.unreadFeed) {
self.selectFeed(SmartFeedsController.shared.unreadFeed) {
self.selectFirstUnreadArticleInTimeline()
}
}
}
func showSearch() {
selectFeed(indexPath: nil) {
self.installTimelineControllerIfNecessary(animated: false)
DispatchQueue.main.asyncAfter(deadline: .now()) {
self.masterTimelineViewController!.showSearchAll()
}
}
}
// MARK: Notifications
@objc func unreadCountDidInitialize(_ notification: Notification) {
guard notification.object is AccountManager else {
return
}
rebuildBackingStores(initialLoad: true, completion: {
if let (feedIdentifier, articleID, isShowingExtractedArticle, articleWindowScrollY) = self.deferredFeedAndArticleSelect,
let feedNode = self.nodeFor(feedID: feedIdentifier),
let feedIndexPath = self.indexPathFor(feedNode) {
self.selectFeed(indexPath: feedIndexPath) {
self.selectArticleInCurrentFeed(articleID, isShowingExtractedArticle: isShowingExtractedArticle, articleWindowScrollY: articleWindowScrollY)
}
}
})
}
@objc func unreadCountDidChange(_ note: Notification) {
// We will handle the filtering of unread feeds in unreadCountDidInitialize after they have all be calculated
guard AccountManager.shared.isUnreadCountsInitialized else {
return
}
queueRebuildBackingStores()
}
@objc func statusesDidChange(_ note: Notification) {
updateUnreadCount()
}
@objc func containerChildrenDidChange(_ note: Notification) {
if timelineFetcherContainsAnyPseudoFeed() || timelineFetcherContainsAnyFolder() {
fetchAndMergeArticlesAsync(animated: true) {
self.masterTimelineViewController?.reinitializeArticles(resetScroll: false)
self.rebuildBackingStores()
}
} else {
rebuildBackingStores()
}
}
@objc func batchUpdateDidPerform(_ notification: Notification) {
rebuildBackingStores()
}
@objc func displayNameDidChange(_ note: Notification) {
rebuildBackingStores()
}
@objc func accountStateDidChange(_ note: Notification) {
let expandNewlyActivatedAccount = {
if let account = note.userInfo?[Account.UserInfoKey.account] as? Account,
account.isActive,
let node = self.treeController.rootNode.childNodeRepresentingObject(account) {
self.markExpanded(node)
}
}
if timelineFetcherContainsAnyPseudoFeed() {
fetchAndMergeArticlesAsync(animated: true) {
self.masterTimelineViewController?.reinitializeArticles(resetScroll: false)
self.rebuildBackingStores(updateExpandedNodes: expandNewlyActivatedAccount)
}
} else {
self.rebuildBackingStores(updateExpandedNodes: expandNewlyActivatedAccount)
}
}
@objc func userDidAddAccount(_ note: Notification) {
let expandNewAccount = {
if let account = note.userInfo?[Account.UserInfoKey.account] as? Account,
let node = self.treeController.rootNode.childNodeRepresentingObject(account) {
self.markExpanded(node)
}
}
if timelineFetcherContainsAnyPseudoFeed() {
fetchAndMergeArticlesAsync(animated: true) {
self.masterTimelineViewController?.reinitializeArticles(resetScroll: false)
self.rebuildBackingStores(updateExpandedNodes: expandNewAccount)
}
} else {
self.rebuildBackingStores(updateExpandedNodes: expandNewAccount)
}
}
@objc func userDidDeleteAccount(_ note: Notification) {
let cleanupAccount = {
if let account = note.userInfo?[Account.UserInfoKey.account] as? Account,
let node = self.treeController.rootNode.childNodeRepresentingObject(account) {
self.unmarkExpanded(node)
}
}
if timelineFetcherContainsAnyPseudoFeed() {
fetchAndMergeArticlesAsync(animated: true) {
self.masterTimelineViewController?.reinitializeArticles(resetScroll: false)
self.rebuildBackingStores(updateExpandedNodes: cleanupAccount)
}
} else {
self.rebuildBackingStores(updateExpandedNodes: cleanupAccount)
}
}
@objc func userDidAddFeed(_ notification: Notification) {
guard let webFeed = notification.userInfo?[UserInfoKey.webFeed] as? WebFeed else {
return
}
discloseWebFeed(webFeed, animations: [.scroll, .navigation])
}
@objc func userDefaultsDidChange(_ note: Notification) {
self.sortDirection = AppDefaults.shared.timelineSortDirection
self.groupByFeed = AppDefaults.shared.timelineGroupByFeed
}
@objc func accountDidDownloadArticles(_ note: Notification) {
guard let feeds = note.userInfo?[Account.UserInfoKey.webFeeds] as? Set<WebFeed> else {
return
}
let shouldFetchAndMergeArticles = timelineFetcherContainsAnyFeed(feeds) || timelineFetcherContainsAnyPseudoFeed()
if shouldFetchAndMergeArticles {
queueFetchAndMergeArticles()
}
}
@objc func willEnterForeground(_ note: Notification) {
// Don't interfere with any fetch requests that we may have initiated before the app was returned to the foreground.
// For example if you select Next Unread from the Home Screen Quick actions, you can start a request before we are
// in the foreground.
if !fetchRequestQueue.isAnyCurrentRequest {
queueFetchAndMergeArticles()
}
}
@objc func importDownloadedTheme(_ note: Notification) {
guard let userInfo = note.userInfo,
let url = userInfo["url"] as? URL else {
return
}
DispatchQueue.main.async {
self.importTheme(filename: url.path)
}
}
@objc func themeDownloadDidFail(_ note: Notification) {
guard let userInfo = note.userInfo,
let error = userInfo["error"] as? Error else {
return
}
DispatchQueue.main.async {
self.rootSplitViewController.presentError(error, dismiss: nil)
}
}
// MARK: API
func suspend() {
fetchAndMergeArticlesQueue.performCallsImmediately()
rebuildBackingStoresQueue.performCallsImmediately()
fetchRequestQueue.cancelAllRequests()
}
func cleanUp(conditional: Bool) {
if isReadFeedsFiltered {
rebuildBackingStores()
}
if isReadArticlesFiltered && (AppDefaults.shared.refreshClearsReadArticles || !conditional) {
refreshTimeline(resetScroll: false)
}
}
func toggleReadFeedsFilter() {
if isReadFeedsFiltered {
treeControllerDelegate.isReadFiltered = false
} else {
treeControllerDelegate.isReadFiltered = true
}
rebuildBackingStores()
masterFeedViewController?.updateUI()
}
func toggleReadArticlesFilter() {
guard let feedID = timelineFeed?.feedID else {
return
}
if isReadArticlesFiltered {
readFilterEnabledTable[feedID] = false
} else {
readFilterEnabledTable[feedID] = true
}
refreshTimeline(resetScroll: false)
}
func shadowNodesFor(section: Int) -> [Node] {
return shadowTable[section]
}
func nodeFor(containerID: ContainerIdentifier) -> Node? {
return treeController.rootNode.descendantNode(where: { node in
if let container = node.representedObject as? Container {
return container.containerID == containerID
} else {
return false
}
})
}
func nodeFor(feedID: FeedIdentifier) -> Node? {
return treeController.rootNode.descendantNode(where: { node in
if let feed = node.representedObject as? Feed {
return feed.feedID == feedID
} else {
return false
}
})
}
func articleFor(_ articleID: String) -> Article? {
return idToAticleDictionary[articleID]
}
func cappedIndexPath(_ indexPath: IndexPath) -> IndexPath {
guard indexPath.section < shadowTable.count && indexPath.row < shadowTable[indexPath.section].count else {
return IndexPath(row: shadowTable[shadowTable.count - 1].count - 1, section: shadowTable.count - 1)
}
return indexPath
}
func unreadCountFor(_ node: Node) -> Int {
// The coordinator supplies the unread count for the currently selected feed
if node.representedObject === timelineFeed as AnyObject {
return unreadCount
}
if let unreadCountProvider = node.representedObject as? UnreadCountProvider {
return unreadCountProvider.unreadCount
}
assertionFailure("This method should only be called for nodes that have an UnreadCountProvider as the represented object.")
return 0
}
func refreshTimeline(resetScroll: Bool) {
if let article = self.currentArticle, let account = article.account {
exceptionArticleFetcher = SingleArticleFetcher(account: account, articleID: article.articleID)
}
fetchAndReplaceArticlesAsync(animated: true) {
self.masterTimelineViewController?.reinitializeArticles(resetScroll: resetScroll)
}
}
func isExpanded(_ containerID: ContainerIdentifier) -> Bool {
return expandedTable.contains(containerID)
}
func isExpanded(_ containerIdentifiable: ContainerIdentifiable) -> Bool {
if let containerID = containerIdentifiable.containerID {
return isExpanded(containerID)
}
return false
}
func isExpanded(_ node: Node) -> Bool {
if let containerIdentifiable = node.representedObject as? ContainerIdentifiable {
return isExpanded(containerIdentifiable)
}
return false
}
func expand(_ containerID: ContainerIdentifier) {
markExpanded(containerID)
rebuildBackingStores()
}
func expand(_ node: Node) {
guard let containerID = (node.representedObject as? ContainerIdentifiable)?.containerID else { return }
expand(containerID)
}
func expandAllSectionsAndFolders() {
for sectionNode in treeController.rootNode.childNodes {
markExpanded(sectionNode)
for topLevelNode in sectionNode.childNodes {
if topLevelNode.representedObject is Folder {
markExpanded(topLevelNode)
}
}
}
rebuildBackingStores()
}
func collapse(_ containerID: ContainerIdentifier) {
unmarkExpanded(containerID)
rebuildBackingStores()
clearTimelineIfNoLongerAvailable()
}
func collapse(_ node: Node) {
guard let containerID = (node.representedObject as? ContainerIdentifiable)?.containerID else { return }
collapse(containerID)
}
func collapseAllFolders() {
for sectionNode in treeController.rootNode.childNodes {
for topLevelNode in sectionNode.childNodes {
if topLevelNode.representedObject is Folder {
unmarkExpanded(topLevelNode)
}
}
}
rebuildBackingStores()
clearTimelineIfNoLongerAvailable()
}
func masterFeedIndexPathForCurrentTimeline() -> IndexPath? {
guard let node = treeController.rootNode.descendantNodeRepresentingObject(timelineFeed as AnyObject) else {
return nil
}
return indexPathFor(node)
}
func selectFeed(_ feed: Feed?, animations: Animations = [], deselectArticle: Bool = true, completion: (() -> Void)? = nil) {
let indexPath: IndexPath? = {
if let feed = feed, let indexPath = indexPathFor(feed as AnyObject) {
return indexPath
} else {
return nil
}
}()
selectFeed(indexPath: indexPath, animations: animations, deselectArticle: deselectArticle, completion: completion)
}
func selectFeed(indexPath: IndexPath?, animations: Animations = [], deselectArticle: Bool = true, completion: (() -> Void)? = nil) {
guard indexPath != currentFeedIndexPath else {
completion?()
return
}
currentFeedIndexPath = indexPath
masterFeedViewController.updateFeedSelection(animations: animations)
if deselectArticle {
selectArticle(nil)
}
if let ip = indexPath, let node = nodeFor(ip), let feed = node.representedObject as? Feed {
self.activityManager.selecting(feed: feed)
self.installTimelineControllerIfNecessary(animated: animations.contains(.navigation))
setTimelineFeed(feed, animated: false) {
completion?()
}
} else {
setTimelineFeed(nil, animated: false) {
if self.isReadFeedsFiltered {
self.rebuildBackingStores()
}
self.activityManager.invalidateSelecting()
if self.rootSplitViewController.isCollapsed && self.navControllerForTimeline().viewControllers.last is MasterTimelineViewController {
self.navControllerForTimeline().popViewController(animated: animations.contains(.navigation))
}
completion?()
}
}
}
func selectPrevFeed() {
if let indexPath = prevFeedIndexPath {
selectFeed(indexPath: indexPath, animations: [.navigation, .scroll])
}
}
func selectNextFeed() {
if let indexPath = nextFeedIndexPath {
selectFeed(indexPath: indexPath, animations: [.navigation, .scroll])
}
}
func selectTodayFeed(completion: (() -> Void)? = nil) {
markExpanded(SmartFeedsController.shared)
self.ensureFeedIsAvailableToSelect(SmartFeedsController.shared.todayFeed) {
self.selectFeed(SmartFeedsController.shared.todayFeed, animations: [.navigation, .scroll], completion: completion)
}
}
func selectAllUnreadFeed(completion: (() -> Void)? = nil) {
markExpanded(SmartFeedsController.shared)
self.ensureFeedIsAvailableToSelect(SmartFeedsController.shared.unreadFeed) {
self.selectFeed(SmartFeedsController.shared.unreadFeed, animations: [.navigation, .scroll], completion: completion)
}
}
func selectStarredFeed(completion: (() -> Void)? = nil) {
markExpanded(SmartFeedsController.shared)
self.ensureFeedIsAvailableToSelect(SmartFeedsController.shared.starredFeed) {
self.selectFeed(SmartFeedsController.shared.starredFeed, animations: [.navigation, .scroll], completion: completion)
}
}
func selectArticle(_ article: Article?, animations: Animations = [], isShowingExtractedArticle: Bool? = nil, articleWindowScrollY: Int? = nil) {
guard article != currentArticle else { return }
currentArticle = article
activityManager.reading(feed: timelineFeed, article: article)
if article == nil {
if rootSplitViewController.isCollapsed {
if masterNavigationController.children.last is ArticleViewController {
masterNavigationController.popViewController(animated: animations.contains(.navigation))
}
} else {
articleViewController?.article = nil
}
masterTimelineViewController?.updateArticleSelection(animations: animations)
return
}
let currentArticleViewController: ArticleViewController
if articleViewController == nil {
currentArticleViewController = installArticleController(animated: animations.contains(.navigation))
} else {
currentArticleViewController = articleViewController!
}
// Mark article as read before navigating to it, so the read status does not flash unread/read on display
markArticles(Set([article!]), statusKey: .read, flag: true)
masterTimelineViewController?.updateArticleSelection(animations: animations)
currentArticleViewController.article = article
if let isShowingExtractedArticle = isShowingExtractedArticle, let articleWindowScrollY = articleWindowScrollY {
currentArticleViewController.restoreScrollPosition = (isShowingExtractedArticle, articleWindowScrollY)
}
}
func beginSearching() {
isSearching = true
preSearchTimelineFeed = timelineFeed
savedSearchArticles = articles
savedSearchArticleIds = Set(articles.map { $0.articleID })
setTimelineFeed(nil, animated: true)
selectArticle(nil)
}
func endSearching() {
if let oldTimelineFeed = preSearchTimelineFeed {
emptyTheTimeline()
timelineFeed = oldTimelineFeed
masterTimelineViewController?.reinitializeArticles(resetScroll: true)
replaceArticles(with: savedSearchArticles!, animated: true)
} else {
setTimelineFeed(nil, animated: true)
}
lastSearchString = ""
lastSearchScope = nil
preSearchTimelineFeed = nil
savedSearchArticleIds = nil
savedSearchArticles = nil
isSearching = false
selectArticle(nil)
masterTimelineViewController?.focus()
}
func searchArticles(_ searchString: String, _ searchScope: SearchScope) {
guard isSearching else { return }
if searchString.count < 3 {
setTimelineFeed(nil, animated: true)
return
}
if searchString != lastSearchString || searchScope != lastSearchScope {
switch searchScope {
case .global:
setTimelineFeed(SmartFeed(delegate: SearchFeedDelegate(searchString: searchString)), animated: true)
case .timeline:
setTimelineFeed(SmartFeed(delegate: SearchTimelineFeedDelegate(searchString: searchString, articleIDs: savedSearchArticleIds!)), animated: true)
}
lastSearchString = searchString
lastSearchScope = searchScope
}
}
func findPrevArticle(_ article: Article) -> Article? {
guard let index = articles.firstIndex(of: article), index > 0 else {
return nil
}
return articles[index - 1]
}
func findNextArticle(_ article: Article) -> Article? {
guard let index = articles.firstIndex(of: article), index + 1 != articles.count else {
return nil
}
return articles[index + 1]
}
func selectPrevArticle() {
if let article = prevArticle {
selectArticle(article, animations: [.navigation, .scroll])
}
}
func selectNextArticle() {
if let article = nextArticle {
selectArticle(article, animations: [.navigation, .scroll])
}
}
func selectFirstUnread() {
if selectFirstUnreadArticleInTimeline() {
activityManager.selectingNextUnread()
}
}
func selectPrevUnread() {
// This should never happen, but I don't want to risk throwing us
// into an infinate loop searching for an unread that isn't there.
if appDelegate.unreadCount < 1 {
return
}
if selectPrevUnreadArticleInTimeline() {
return
}
selectPrevUnreadFeedFetcher()
selectPrevUnreadArticleInTimeline()
}
func selectNextUnread() {
// This should never happen, but I don't want to risk throwing us
// into an infinate loop searching for an unread that isn't there.
if appDelegate.unreadCount < 1 {
return
}
if selectNextUnreadArticleInTimeline() {
return
}
if self.isSearching {
self.masterTimelineViewController?.hideSearch()
}
selectNextUnreadFeed() {
self.selectNextUnreadArticleInTimeline()
}
}
func scrollOrGoToNextUnread() {
if articleViewController?.canScrollDown() ?? false {
articleViewController?.scrollPageDown()
} else {
selectNextUnread()
}
}
func scrollUp() {
if articleViewController?.canScrollUp() ?? false {
articleViewController?.scrollPageUp()
}
}
func markAllAsRead(_ articles: [Article], completion: (() -> Void)? = nil) {
markArticlesWithUndo(articles, statusKey: .read, flag: true, completion: completion)
}
func markAllAsReadInTimeline(completion: (() -> Void)? = nil) {
markAllAsRead(articles) {
self.masterNavigationController.popViewController(animated: true)
completion?()
}
}
func canMarkAboveAsRead(for article: Article) -> Bool {
let articlesAboveArray = articles.articlesAbove(article: article)
return articlesAboveArray.canMarkAllAsRead()
}
func markAboveAsRead() {
guard let currentArticle = currentArticle else {
return
}
markAboveAsRead(currentArticle)
}
func markAboveAsRead(_ article: Article) {
let articlesAboveArray = articles.articlesAbove(article: article)
markAllAsRead(articlesAboveArray)
}
func canMarkBelowAsRead(for article: Article) -> Bool {
let articleBelowArray = articles.articlesBelow(article: article)
return articleBelowArray.canMarkAllAsRead()
}
func markBelowAsRead() {
guard let currentArticle = currentArticle else {
return
}
markBelowAsRead(currentArticle)
}
func markBelowAsRead(_ article: Article) {
let articleBelowArray = articles.articlesBelow(article: article)
markAllAsRead(articleBelowArray)
}
func markAsReadForCurrentArticle() {
if let article = currentArticle {
markArticlesWithUndo([article], statusKey: .read, flag: true)
}
}
func markAsUnreadForCurrentArticle() {
if let article = currentArticle {
markArticlesWithUndo([article], statusKey: .read, flag: false)
}
}
func toggleReadForCurrentArticle() {
if let article = currentArticle {
toggleRead(article)
}
}
func toggleRead(_ article: Article) {
guard !article.status.read || article.isAvailableToMarkUnread else { return }
markArticlesWithUndo([article], statusKey: .read, flag: !article.status.read)
}
func toggleStarredForCurrentArticle() {
if let article = currentArticle {
toggleStar(article)
}
}
func toggleStar(_ article: Article) {
markArticlesWithUndo([article], statusKey: .starred, flag: !article.status.starred)
}
func timelineFeedIsEqualTo(_ feed: WebFeed) -> Bool {
guard let timelineFeed = timelineFeed as? WebFeed else {
return false
}
return timelineFeed == feed
}
func discloseWebFeed(_ webFeed: WebFeed, animations: Animations = [], completion: (() -> Void)? = nil) {
if isSearching {
masterTimelineViewController?.hideSearch()
}
guard let account = webFeed.account else {
completion?()
return
}
let parentFolder = account.sortedFolders?.first(where: { $0.objectIsChild(webFeed) })
markExpanded(account)
if let parentFolder = parentFolder {
markExpanded(parentFolder)
}
if let webFeedFeedID = webFeed.feedID {
self.treeControllerDelegate.addFilterException(webFeedFeedID)
}
if let parentFolderFeedID = parentFolder?.feedID {
self.treeControllerDelegate.addFilterException(parentFolderFeedID)
}
rebuildBackingStores(completion: {
self.treeControllerDelegate.resetFilterExceptions()
self.selectFeed(webFeed, animations: animations, completion: completion)
})
}
func showStatusBar() {
prefersStatusBarHidden = false
UIView.animate(withDuration: 0.15) {
self.rootSplitViewController.setNeedsStatusBarAppearanceUpdate()
}
}
func hideStatusBar() {
prefersStatusBarHidden = true
UIView.animate(withDuration: 0.15) {
self.rootSplitViewController.setNeedsStatusBarAppearanceUpdate()
}
}
func showSettings(scrollToArticlesSection: Bool = false) {
let settingsNavController = UIStoryboard.settings.instantiateInitialViewController() as! UINavigationController
let settingsViewController = settingsNavController.topViewController as! SettingsViewController
settingsViewController.scrollToArticlesSection = scrollToArticlesSection
settingsNavController.modalPresentationStyle = .formSheet
settingsViewController.presentingParentController = rootSplitViewController
rootSplitViewController.present(settingsNavController, animated: true)
}
func showAccountInspector(for account: Account) {
let accountInspectorNavController =
UIStoryboard.inspector.instantiateViewController(identifier: "AccountInspectorNavigationViewController") as! UINavigationController
let accountInspectorController = accountInspectorNavController.topViewController as! AccountInspectorViewController
accountInspectorNavController.modalPresentationStyle = .formSheet
accountInspectorNavController.preferredContentSize = AccountInspectorViewController.preferredContentSizeForFormSheetDisplay
accountInspectorController.isModal = true
accountInspectorController.account = account
rootSplitViewController.present(accountInspectorNavController, animated: true)
}
func showFeedInspector() {
let timelineWebFeed = timelineFeed as? WebFeed
let articleFeed = currentArticle?.webFeed
guard let feed = timelineWebFeed ?? articleFeed else {
return
}
showFeedInspector(for: feed)
}
func showFeedInspector(for feed: WebFeed) {
let feedInspectorNavController =
UIStoryboard.inspector.instantiateViewController(identifier: "FeedInspectorNavigationViewController") as! UINavigationController
let feedInspectorController = feedInspectorNavController.topViewController as! WebFeedInspectorViewController
feedInspectorNavController.modalPresentationStyle = .formSheet
feedInspectorNavController.preferredContentSize = WebFeedInspectorViewController.preferredContentSizeForFormSheetDisplay
feedInspectorController.webFeed = feed
rootSplitViewController.present(feedInspectorNavController, animated: true)
}
func showAddWebFeed(initialFeed: String? = nil, initialFeedName: String? = nil) {
// Since Add Feed can be opened from anywhere with a keyboard shortcut, we have to deselect any currently selected feeds
selectFeed(nil)
let addNavViewController = UIStoryboard.add.instantiateViewController(withIdentifier: "AddWebFeedViewControllerNav") as! UINavigationController
let addViewController = addNavViewController.topViewController as! AddFeedViewController
addViewController.initialFeed = initialFeed
addViewController.initialFeedName = initialFeedName
addNavViewController.modalPresentationStyle = .formSheet
addNavViewController.preferredContentSize = AddFeedViewController.preferredContentSizeForFormSheetDisplay
masterFeedViewController.present(addNavViewController, animated: true)
}
func showAddRedditFeed() {
let addNavViewController = UIStoryboard.redditAdd.instantiateInitialViewController() as! UINavigationController
addNavViewController.modalPresentationStyle = .formSheet
addNavViewController.preferredContentSize = AddFeedViewController.preferredContentSizeForFormSheetDisplay
masterFeedViewController.present(addNavViewController, animated: true)
}
func showAddTwitterFeed() {
let addNavViewController = UIStoryboard.twitterAdd.instantiateInitialViewController() as! UINavigationController
addNavViewController.modalPresentationStyle = .formSheet
addNavViewController.preferredContentSize = AddFeedViewController.preferredContentSizeForFormSheetDisplay
masterFeedViewController.present(addNavViewController, animated: true)
}
func showAddFolder() {
let addNavViewController = UIStoryboard.add.instantiateViewController(withIdentifier: "AddFolderViewControllerNav") as! UINavigationController
addNavViewController.modalPresentationStyle = .formSheet
addNavViewController.preferredContentSize = AddFolderViewController.preferredContentSizeForFormSheetDisplay
masterFeedViewController.present(addNavViewController, animated: true)
}
func showFullScreenImage(image: UIImage, imageTitle: String?, transitioningDelegate: UIViewControllerTransitioningDelegate) {
let imageVC = UIStoryboard.main.instantiateController(ofType: ImageViewController.self)
imageVC.image = image
imageVC.imageTitle = imageTitle
imageVC.modalPresentationStyle = .currentContext
imageVC.transitioningDelegate = transitioningDelegate
rootSplitViewController.present(imageVC, animated: true)
}
func homePageURLForFeed(_ indexPath: IndexPath) -> URL? {
guard let node = nodeFor(indexPath),
let feed = node.representedObject as? WebFeed,
let homePageURL = feed.homePageURL,
let url = URL(string: homePageURL) else {
return nil
}
return url
}
func showBrowserForFeed(_ indexPath: IndexPath) {
if let url = homePageURLForFeed(indexPath) {
UIApplication.shared.open(url, options: [:])
}
}
func showBrowserForCurrentFeed() {
if let ip = currentFeedIndexPath, let url = homePageURLForFeed(ip) {
UIApplication.shared.open(url, options: [:])
}
}
func showBrowserForArticle(_ article: Article) {
guard let url = article.preferredURL else { return }
UIApplication.shared.open(url, options: [:])
}
func showBrowserForCurrentArticle() {
guard let url = currentArticle?.preferredURL else { return }
UIApplication.shared.open(url, options: [:])
}
func showInAppBrowser() {
if currentArticle != nil {
articleViewController?.openInAppBrowser()
}
else {
masterFeedViewController.openInAppBrowser()
}
}
func navigateToFeeds() {
masterFeedViewController?.focus()
selectArticle(nil)
}
func navigateToTimeline() {
if currentArticle == nil && articles.count > 0 {
selectArticle(articles[0])
}
masterTimelineViewController?.focus()
}
func navigateToDetail() {
articleViewController?.focus()
}
func toggleSidebar() {
rootSplitViewController.preferredDisplayMode = rootSplitViewController.displayMode == .allVisible ? .primaryHidden : .allVisible
}
func selectArticleInCurrentFeed(_ articleID: String, isShowingExtractedArticle: Bool? = nil, articleWindowScrollY: Int? = nil) {
if let article = self.articles.first(where: { $0.articleID == articleID }) {
self.selectArticle(article, isShowingExtractedArticle: isShowingExtractedArticle, articleWindowScrollY: articleWindowScrollY)
}
}
func importTheme(filename: String) {
do {
try ArticleThemeImporter.importTheme(controller: rootSplitViewController, filename: filename)
} catch {
NotificationCenter.default.post(name: .didFailToImportThemeWithError, object: nil, userInfo: ["error" : error])
}
}
}
// MARK: UISplitViewControllerDelegate
extension SceneCoordinator: UISplitViewControllerDelegate {
func splitViewController(_ splitViewController: UISplitViewController, collapseSecondary secondaryViewController:UIViewController, onto primaryViewController:UIViewController) -> Bool {
masterTimelineViewController?.updateUI()
guard !isThreePanelMode else {
return true
}
if let articleViewController = (secondaryViewController as? UINavigationController)?.topViewController as? ArticleViewController {
if currentArticle != nil {
masterNavigationController.pushViewController(articleViewController, animated: false)
}
}
return true
}
func splitViewController(_ splitViewController: UISplitViewController, separateSecondaryFrom primaryViewController: UIViewController) -> UIViewController? {
masterTimelineViewController?.updateUI()
guard !isThreePanelMode else {
return subSplitViewController
}
if let articleViewController = masterNavigationController.viewControllers.last as? ArticleViewController {
articleViewController.showBars(self)
masterNavigationController.popViewController(animated: false)
let controller = addNavControllerIfNecessary(articleViewController, showButton: true)
return controller
}
if currentArticle == nil {
let articleViewController = UIStoryboard.main.instantiateController(ofType: ArticleViewController.self)
articleViewController.coordinator = self
let controller = addNavControllerIfNecessary(articleViewController, showButton: true)
return controller
}
return nil
}
}
// MARK: UINavigationControllerDelegate
extension SceneCoordinator: UINavigationControllerDelegate {
func navigationController(_ navigationController: UINavigationController, didShow viewController: UIViewController, animated: Bool) {
if UIApplication.shared.applicationState == .background {
return
}
// If we are showing the Feeds and only the feeds start clearing stuff
if viewController === masterFeedViewController && !isThreePanelMode && !isTimelineViewControllerPending {
activityManager.invalidateCurrentActivities()
selectFeed(nil, animations: [.scroll, .select, .navigation])
return
}
// If we are using a phone and navigate away from the detail, clear up the article resources (including activity).
// Don't clear it if we have pushed an ArticleViewController, but don't yet see it on the navigation stack.
// This happens when we are going to the next unread and we need to grab another timeline to continue. The
// ArticleViewController will be pushed, but we will breifly show the Timeline. Don't clear things out when that happens.
if viewController === masterTimelineViewController && !isThreePanelMode && rootSplitViewController.isCollapsed && !isArticleViewControllerPending {
currentArticle = nil
masterTimelineViewController?.updateArticleSelection(animations: [.scroll, .select, .navigation])
activityManager.invalidateReading()
// Restore any bars hidden by the article controller
showStatusBar()
navigationController.setNavigationBarHidden(false, animated: true)
navigationController.setToolbarHidden(false, animated: true)
return
}
}
}
// MARK: Private
private extension SceneCoordinator {
func markArticlesWithUndo(_ articles: [Article], statusKey: ArticleStatus.Key, flag: Bool, completion: (() -> Void)? = nil) {
guard let undoManager = undoManager,
let markReadCommand = MarkStatusCommand(initialArticles: articles, statusKey: statusKey, flag: flag, undoManager: undoManager, completion: completion) else {
completion?()
return
}
runCommand(markReadCommand)
}
func updateUnreadCount() {
var count = 0
for article in articles {
if !article.status.read {
count += 1
}
}
unreadCount = count
}
func rebuildArticleDictionaries() {
var idDictionary = [String: Article]()
articles.forEach { article in
idDictionary[article.articleID] = article
}
_idToArticleDictionary = idDictionary
articleDictionaryNeedsUpdate = false
}
func ensureFeedIsAvailableToSelect(_ feed: Feed, completion: @escaping () -> Void) {
addToFilterExeptionsIfNecessary(feed)
addShadowTableToFilterExceptions()
rebuildBackingStores(completion: {
self.treeControllerDelegate.resetFilterExceptions()
completion()
})
}
func addToFilterExeptionsIfNecessary(_ feed: Feed?) {
if isReadFeedsFiltered, let feedID = feed?.feedID {
if feed is SmartFeed {
treeControllerDelegate.addFilterException(feedID)
} else if let folderFeed = feed as? Folder {
if folderFeed.account?.existingFolder(withID: folderFeed.folderID) != nil {
treeControllerDelegate.addFilterException(feedID)
}
} else if let webFeed = feed as? WebFeed {
if webFeed.account?.existingWebFeed(withWebFeedID: webFeed.webFeedID) != nil {
treeControllerDelegate.addFilterException(feedID)
addParentFolderToFilterExceptions(webFeed)
}
}
}
}
func addParentFolderToFilterExceptions(_ feed: Feed) {
guard let node = treeController.rootNode.descendantNodeRepresentingObject(feed as AnyObject),
let folder = node.parent?.representedObject as? Folder,
let folderFeedID = folder.feedID else {
return
}
treeControllerDelegate.addFilterException(folderFeedID)
}
func addShadowTableToFilterExceptions() {
for section in shadowTable {
for node in section {
if let feed = node.representedObject as? Feed, let feedID = feed.feedID {
treeControllerDelegate.addFilterException(feedID)
}
}
}
}
func queueRebuildBackingStores() {
rebuildBackingStoresQueue.add(self, #selector(rebuildBackingStoresWithDefaults))
}
@objc func rebuildBackingStoresWithDefaults() {
rebuildBackingStores()
}
func rebuildBackingStores(initialLoad: Bool = false, updateExpandedNodes: (() -> Void)? = nil, completion: (() -> Void)? = nil) {
if !BatchUpdate.shared.isPerforming {
addToFilterExeptionsIfNecessary(timelineFeed)
treeController.rebuild()
treeControllerDelegate.resetFilterExceptions()
updateExpandedNodes?()
rebuildShadowTable()
masterFeedViewController.reloadFeeds(initialLoad: initialLoad, completion: completion)
}
}
func rebuildShadowTable() {
shadowTable = [[Node]]()
for i in 0..<treeController.rootNode.numberOfChildNodes {
var result = [Node]()
let sectionNode = treeController.rootNode.childAtIndex(i)!
if isExpanded(sectionNode) {
for node in sectionNode.childNodes {
result.append(node)
if isExpanded(node) {
for child in node.childNodes {
result.append(child)
}
}
}
}
shadowTable.append(result)
}
// If we have a current Feed IndexPath it is no longer valid and needs reset.
if currentFeedIndexPath != nil {
currentFeedIndexPath = indexPathFor(timelineFeed as AnyObject)
}
}
func shadowTableContains(_ feed: Feed) -> Bool {
for section in shadowTable {
for node in section {
if let nodeFeed = node.representedObject as? Feed, nodeFeed.feedID == feed.feedID {
return true
}
}
}
return false
}
func clearTimelineIfNoLongerAvailable() {
if let feed = timelineFeed, !shadowTableContains(feed) {
selectFeed(nil, deselectArticle: true)
}
}
func nodeFor(_ indexPath: IndexPath) -> Node? {
guard indexPath.section < shadowTable.count && indexPath.row < shadowTable[indexPath.section].count else {
return nil
}
return shadowTable[indexPath.section][indexPath.row]
}
func indexPathFor(_ node: Node) -> IndexPath? {
for i in 0..<shadowTable.count {
if let row = shadowTable[i].firstIndex(of: node) {
return IndexPath(row: row, section: i)
}
}
return nil
}
func indexPathFor(_ object: AnyObject) -> IndexPath? {
guard let node = treeController.rootNode.descendantNodeRepresentingObject(object) else {
return nil
}
return indexPathFor(node)
}
func setTimelineFeed(_ feed: Feed?, animated: Bool, completion: (() -> Void)? = nil) {
timelineFeed = feed
fetchAndReplaceArticlesAsync(animated: animated) {
self.masterTimelineViewController?.reinitializeArticles(resetScroll: true)
completion?()
}
}
func updateShowNamesAndIcons() {
if timelineFeed is WebFeed {
showFeedNames = {
for article in articles {
if !article.byline().isEmpty {
return .byline
}
}
return .none
}()
} else {
showFeedNames = .feed
}
if showFeedNames == .feed {
self.showIcons = true
return
}
if showFeedNames == .none {
self.showIcons = false
return
}
for article in articles {
if let authors = article.authors {
for author in authors {
if author.avatarURL != nil {
self.showIcons = true
return
}
}
}
}
self.showIcons = false
}
func markExpanded(_ containerID: ContainerIdentifier) {
expandedTable.insert(containerID)
}
func markExpanded(_ containerIdentifiable: ContainerIdentifiable) {
if let containerID = containerIdentifiable.containerID {
markExpanded(containerID)
}
}
func markExpanded(_ node: Node) {
if let containerIdentifiable = node.representedObject as? ContainerIdentifiable {
markExpanded(containerIdentifiable)
}
}
func unmarkExpanded(_ containerID: ContainerIdentifier) {
expandedTable.remove(containerID)
}
func unmarkExpanded(_ containerIdentifiable: ContainerIdentifiable) {
if let containerID = containerIdentifiable.containerID {
unmarkExpanded(containerID)
}
}
func unmarkExpanded(_ node: Node) {
if let containerIdentifiable = node.representedObject as? ContainerIdentifiable {
unmarkExpanded(containerIdentifiable)
}
}
// MARK: Select Prev Unread
@discardableResult
func selectPrevUnreadArticleInTimeline() -> Bool {
let startingRow: Int = {
if let articleRow = currentArticleRow {
return articleRow
} else {
return articles.count - 1
}
}()
return selectPrevArticleInTimeline(startingRow: startingRow)
}
func selectPrevArticleInTimeline(startingRow: Int) -> Bool {
guard startingRow >= 0 else {
return false
}
for i in (0...startingRow).reversed() {
let article = articles[i]
if !article.status.read {
selectArticle(article)
return true
}
}
return false
}
func selectPrevUnreadFeedFetcher() {
let indexPath: IndexPath = {
if currentFeedIndexPath == nil {
return IndexPath(row: 0, section: 0)
} else {
return currentFeedIndexPath!
}
}()
// Increment or wrap around the IndexPath
let nextIndexPath: IndexPath = {
if indexPath.row - 1 < 0 {
if indexPath.section - 1 < 0 {
return IndexPath(row: shadowTable[shadowTable.count - 1].count - 1, section: shadowTable.count - 1)
} else {
return IndexPath(row: shadowTable[indexPath.section - 1].count - 1, section: indexPath.section - 1)
}
} else {
return IndexPath(row: indexPath.row - 1, section: indexPath.section)
}
}()
if selectPrevUnreadFeedFetcher(startingWith: nextIndexPath) {
return
}
let maxIndexPath = IndexPath(row: shadowTable[shadowTable.count - 1].count - 1, section: shadowTable.count - 1)
selectPrevUnreadFeedFetcher(startingWith: maxIndexPath)
}
@discardableResult
func selectPrevUnreadFeedFetcher(startingWith indexPath: IndexPath) -> Bool {
for i in (0...indexPath.section).reversed() {
let startingRow: Int = {
if indexPath.section == i {
return indexPath.row
} else {
return shadowTable[i].count - 1
}
}()
for j in (0...startingRow).reversed() {
let prevIndexPath = IndexPath(row: j, section: i)
guard let node = nodeFor(prevIndexPath), let unreadCountProvider = node.representedObject as? UnreadCountProvider else {
assertionFailure()
return true
}
if isExpanded(node) {
continue
}
if unreadCountProvider.unreadCount > 0 {
selectFeed(indexPath: prevIndexPath, animations: [.scroll, .navigation])
return true
}
}
}
return false
}
// MARK: Select Next Unread
@discardableResult
func selectFirstUnreadArticleInTimeline() -> Bool {
return selectNextArticleInTimeline(startingRow: 0, animated: true)
}
@discardableResult
func selectNextUnreadArticleInTimeline() -> Bool {
let startingRow: Int = {
if let articleRow = currentArticleRow {
return articleRow + 1
} else {
return 0
}
}()
return selectNextArticleInTimeline(startingRow: startingRow, animated: false)
}
func selectNextArticleInTimeline(startingRow: Int, animated: Bool) -> Bool {
guard startingRow < articles.count else {
return false
}
for i in startingRow..<articles.count {
let article = articles[i]
if !article.status.read {
selectArticle(article, animations: [.scroll, .navigation])
return true
}
}
return false
}
func selectNextUnreadFeed(completion: @escaping () -> Void) {
let indexPath: IndexPath = {
if currentFeedIndexPath == nil {
return IndexPath(row: -1, section: 0)
} else {
return currentFeedIndexPath!
}
}()
// Increment or wrap around the IndexPath
let nextIndexPath: IndexPath = {
if indexPath.row + 1 >= shadowTable[indexPath.section].count {
if indexPath.section + 1 >= shadowTable.count {
return IndexPath(row: 0, section: 0)
} else {
return IndexPath(row: 0, section: indexPath.section + 1)
}
} else {
return IndexPath(row: indexPath.row + 1, section: indexPath.section)
}
}()
selectNextUnreadFeed(startingWith: nextIndexPath) { found in
if !found {
self.selectNextUnreadFeed(startingWith: IndexPath(row: 0, section: 0)) { _ in
completion()
}
} else {
completion()
}
}
}
func selectNextUnreadFeed(startingWith indexPath: IndexPath, completion: @escaping (Bool) -> Void) {
for i in indexPath.section..<shadowTable.count {
let startingRow: Int = {
if indexPath.section == i {
return indexPath.row
} else {
return 0
}
}()
for j in startingRow..<shadowTable[i].count {
let nextIndexPath = IndexPath(row: j, section: i)
guard let node = nodeFor(nextIndexPath), let unreadCountProvider = node.representedObject as? UnreadCountProvider else {
assertionFailure()
completion(false)
return
}
if isExpanded(node) {
continue
}
if unreadCountProvider.unreadCount > 0 {
selectFeed(indexPath: nextIndexPath, animations: [.scroll, .navigation], deselectArticle: false) {
self.currentArticle = nil
completion(true)
}
return
}
}
}
completion(false)
}
// MARK: Fetching Articles
func emptyTheTimeline() {
if !articles.isEmpty {
replaceArticles(with: Set<Article>(), animated: false)
}
}
func sortParametersDidChange() {
replaceArticles(with: Set(articles), animated: true)
}
func replaceArticles(with unsortedArticles: Set<Article>, animated: Bool) {
let sortedArticles = Array(unsortedArticles).sortedByDate(sortDirection, groupByFeed: groupByFeed)
replaceArticles(with: sortedArticles, animated: animated)
}
func replaceArticles(with sortedArticles: ArticleArray, animated: Bool) {
if articles != sortedArticles {
articles = sortedArticles
updateShowNamesAndIcons()
updateUnreadCount()
masterTimelineViewController?.reloadArticles(animated: animated)
}
}
func queueFetchAndMergeArticles() {
fetchAndMergeArticlesQueue.add(self, #selector(fetchAndMergeArticlesAsync))
}
@objc func fetchAndMergeArticlesAsync() {
fetchAndMergeArticlesAsync(animated: true) {
self.masterTimelineViewController?.reinitializeArticles(resetScroll: false)
self.masterTimelineViewController?.restoreSelectionIfNecessary(adjustScroll: false)
}
}
func fetchAndMergeArticlesAsync(animated: Bool = true, completion: (() -> Void)? = nil) {
guard let timelineFeed = timelineFeed else {
return
}
fetchUnsortedArticlesAsync(for: [timelineFeed]) { [weak self] (unsortedArticles) in
// Merge articles by articleID. For any unique articleID in current articles, add to unsortedArticles.
guard let strongSelf = self else {
return
}
let unsortedArticleIDs = unsortedArticles.articleIDs()
var updatedArticles = unsortedArticles
for article in strongSelf.articles {
if !unsortedArticleIDs.contains(article.articleID) {
updatedArticles.insert(article)
}
if article.account?.existingWebFeed(withWebFeedID: article.webFeedID) == nil {
updatedArticles.remove(article)
}
}
strongSelf.replaceArticles(with: updatedArticles, animated: animated)
completion?()
}
}
func cancelPendingAsyncFetches() {
fetchSerialNumber += 1
fetchRequestQueue.cancelAllRequests()
}
func fetchAndReplaceArticlesAsync(animated: Bool, completion: @escaping () -> Void) {
// To be called when we need to do an entire fetch, but an async delay is okay.
// Example: we have the Today feed selected, and the calendar day just changed.
cancelPendingAsyncFetches()
guard let timelineFeed = timelineFeed else {
emptyTheTimeline()
completion()
return
}
var fetchers = [ArticleFetcher]()
fetchers.append(timelineFeed)
if exceptionArticleFetcher != nil {
fetchers.append(exceptionArticleFetcher!)
exceptionArticleFetcher = nil
}
fetchUnsortedArticlesAsync(for: fetchers) { [weak self] (articles) in
self?.replaceArticles(with: articles, animated: animated)
completion()
}
}
func fetchUnsortedArticlesAsync(for representedObjects: [Any], completion: @escaping ArticleSetBlock) {
// The callback will *not* be called if the fetch is no longer relevant that is,
// if its been superseded by a newer fetch, or the timeline was emptied, etc., it wont get called.
precondition(Thread.isMainThread)
cancelPendingAsyncFetches()
let fetchers = representedObjects.compactMap { $0 as? ArticleFetcher }
let fetchOperation = FetchRequestOperation(id: fetchSerialNumber, readFilterEnabledTable: readFilterEnabledTable, fetchers: fetchers) { [weak self] (articles, operation) in
precondition(Thread.isMainThread)
guard !operation.isCanceled, let strongSelf = self, operation.id == strongSelf.fetchSerialNumber else {
return
}
completion(articles)
}
fetchRequestQueue.add(fetchOperation)
}
func timelineFetcherContainsAnyPseudoFeed() -> Bool {
if timelineFeed is PseudoFeed {
return true
}
return false
}
func timelineFetcherContainsAnyFolder() -> Bool {
if timelineFeed is Folder {
return true
}
return false
}
func timelineFetcherContainsAnyFeed(_ feeds: Set<WebFeed>) -> Bool {
// Return true if theres a match or if a folder contains (recursively) one of feeds
if let feed = timelineFeed as? WebFeed {
for oneFeed in feeds {
if feed.webFeedID == oneFeed.webFeedID || feed.url == oneFeed.url {
return true
}
}
} else if let folder = timelineFeed as? Folder {
for oneFeed in feeds {
if folder.hasWebFeed(with: oneFeed.webFeedID) || folder.hasWebFeed(withURL: oneFeed.url) {
return true
}
}
}
return false
}
// MARK: Three Panel Mode
func installTimelineControllerIfNecessary(animated: Bool) {
if navControllerForTimeline().viewControllers.filter({ $0 is MasterTimelineViewController }).count < 1 {
isTimelineViewControllerPending = true
masterTimelineViewController = UIStoryboard.main.instantiateController(ofType: MasterTimelineViewController.self)
masterTimelineViewController!.coordinator = self
navControllerForTimeline().pushViewController(masterTimelineViewController!, animated: animated)
}
}
@discardableResult
func installArticleController(state: ArticleViewController.State? = nil, animated: Bool) -> ArticleViewController {
isArticleViewControllerPending = true
let articleController = UIStoryboard.main.instantiateController(ofType: ArticleViewController.self)
articleController.coordinator = self
articleController.article = currentArticle
articleController.restoreState = state
if let subSplit = subSplitViewController {
let controller = addNavControllerIfNecessary(articleController, showButton: false)
subSplit.showDetailViewController(controller, sender: self)
} else if rootSplitViewController.isCollapsed || wasRootSplitViewControllerCollapsed {
masterNavigationController.pushViewController(articleController, animated: animated)
} else {
let controller = addNavControllerIfNecessary(articleController, showButton: true)
rootSplitViewController.showDetailViewController(controller, sender: self)
}
return articleController
}
func addNavControllerIfNecessary(_ controller: UIViewController, showButton: Bool) -> UIViewController {
// You will sometimes get a compact horizontal size class while in three panel mode. Dunno why it lies.
if rootSplitViewController.traitCollection.horizontalSizeClass == .compact && !isThreePanelMode {
return controller
} else {
let navController = InteractiveNavigationController.template(rootViewController: controller)
navController.isToolbarHidden = false
if showButton {
controller.navigationItem.leftBarButtonItem = rootSplitViewController.displayModeButtonItem
controller.navigationItem.leftItemsSupplementBackButton = true
} else {
controller.navigationItem.leftBarButtonItem = nil
controller.navigationItem.leftItemsSupplementBackButton = false
}
return navController
}
}
func installSubSplit() {
rootSplitViewController.preferredPrimaryColumnWidthFraction = 0.30
subSplitViewController = UISplitViewController()
subSplitViewController!.preferredDisplayMode = .allVisible
subSplitViewController!.viewControllers = [InteractiveNavigationController.template()]
subSplitViewController!.preferredPrimaryColumnWidthFraction = 0.4285
rootSplitViewController.showDetailViewController(subSplitViewController!, sender: self)
rootSplitViewController.setOverrideTraitCollection(UITraitCollection(horizontalSizeClass: .regular), forChild: subSplitViewController!)
}
func navControllerForTimeline() -> UINavigationController {
if let subSplit = subSplitViewController {
return subSplit.viewControllers.first as! UINavigationController
} else {
return masterNavigationController
}
}
func configureThreePanelMode() {
articleViewController?.stopArticleExtractorIfProcessing()
let articleViewControllerState = articleViewController?.currentState
defer {
masterNavigationController.viewControllers = [masterFeedViewController]
}
if rootSplitViewController.viewControllers.last is InteractiveNavigationController {
_ = rootSplitViewController.viewControllers.popLast()
}
installSubSplit()
installTimelineControllerIfNecessary(animated: false)
masterTimelineViewController?.navigationItem.leftBarButtonItem = rootSplitViewController.displayModeButtonItem
masterTimelineViewController?.navigationItem.leftItemsSupplementBackButton = true
installArticleController(state: articleViewControllerState, animated: false)
masterFeedViewController.restoreSelectionIfNecessary(adjustScroll: true)
masterTimelineViewController!.restoreSelectionIfNecessary(adjustScroll: false)
}
func configureStandardPanelMode() {
articleViewController?.stopArticleExtractorIfProcessing()
let articleViewControllerState = articleViewController?.currentState
rootSplitViewController.preferredPrimaryColumnWidthFraction = UISplitViewController.automaticDimension
// Set the is Pending flags early to prevent the navigation controller delegate from thinking that we
// swiping around in the user interface
isTimelineViewControllerPending = true
isArticleViewControllerPending = true
masterNavigationController.viewControllers = [masterFeedViewController]
if rootSplitViewController.viewControllers.last is UISplitViewController {
subSplitViewController = nil
_ = rootSplitViewController.viewControllers.popLast()
}
if currentFeedIndexPath != nil {
masterTimelineViewController = UIStoryboard.main.instantiateController(ofType: MasterTimelineViewController.self)
masterTimelineViewController!.coordinator = self
masterNavigationController.pushViewController(masterTimelineViewController!, animated: false)
}
installArticleController(state: articleViewControllerState, animated: false)
}
// MARK: NSUserActivity
func windowState() -> [AnyHashable: Any] {
let containerExpandedWindowState = expandedTable.map( { $0.userInfo })
var readArticlesFilterState = [[AnyHashable: AnyHashable]: Bool]()
for key in readFilterEnabledTable.keys {
readArticlesFilterState[key.userInfo] = readFilterEnabledTable[key]
}
return [
UserInfoKey.readFeedsFilterState: isReadFeedsFiltered,
UserInfoKey.containerExpandedWindowState: containerExpandedWindowState,
UserInfoKey.readArticlesFilterState: readArticlesFilterState
]
}
func handleSelectFeed(_ userInfo: [AnyHashable : Any]?) {
guard let userInfo = userInfo,
let feedIdentifierUserInfo = userInfo[UserInfoKey.feedIdentifier] as? [AnyHashable : AnyHashable],
let feedIdentifier = FeedIdentifier(userInfo: feedIdentifierUserInfo) else {
return
}
treeControllerDelegate.addFilterException(feedIdentifier)
switch feedIdentifier {
case .smartFeed:
guard let smartFeed = SmartFeedsController.shared.find(by: feedIdentifier) else { return }
markExpanded(SmartFeedsController.shared)
rebuildBackingStores(completion: {
self.treeControllerDelegate.resetFilterExceptions()
if let indexPath = self.indexPathFor(smartFeed) {
self.selectFeed(indexPath: indexPath) {
self.masterFeedViewController.focus()
}
}
})
case .script:
break
case .folder(let accountID, let folderName):
guard let accountNode = self.findAccountNode(accountID: accountID),
let account = accountNode.representedObject as? Account else {
return
}
markExpanded(account)
rebuildBackingStores(completion: {
self.treeControllerDelegate.resetFilterExceptions()
if let folderNode = self.findFolderNode(folderName: folderName, beginningAt: accountNode), let indexPath = self.indexPathFor(folderNode) {
self.selectFeed(indexPath: indexPath) {
self.masterFeedViewController.focus()
}
}
})
case .webFeed(let accountID, let webFeedID):
guard let accountNode = findAccountNode(accountID: accountID),
let account = accountNode.representedObject as? Account,
let webFeed = account.existingWebFeed(withWebFeedID: webFeedID) else {
return
}
self.discloseWebFeed(webFeed) {
self.masterFeedViewController.focus()
}
}
}
func handleReadArticle(_ userInfo: [AnyHashable : Any]?) {
guard let userInfo = userInfo else { return }
guard let articlePathUserInfo = userInfo[UserInfoKey.articlePath] as? [AnyHashable : Any],
let accountID = articlePathUserInfo[ArticlePathKey.accountID] as? String,
let accountName = articlePathUserInfo[ArticlePathKey.accountName] as? String,
let webFeedID = articlePathUserInfo[ArticlePathKey.webFeedID] as? String,
let articleID = articlePathUserInfo[ArticlePathKey.articleID] as? String,
let accountNode = findAccountNode(accountID: accountID, accountName: accountName),
let account = accountNode.representedObject as? Account else {
return
}
exceptionArticleFetcher = SingleArticleFetcher(account: account, articleID: articleID)
if restoreFeedSelection(userInfo, accountID: accountID, webFeedID: webFeedID, articleID: articleID) {
return
}
guard let webFeed = account.existingWebFeed(withWebFeedID: webFeedID) else {
return
}
discloseWebFeed(webFeed) {
self.selectArticleInCurrentFeed(articleID)
}
}
func restoreFeedSelection(_ userInfo: [AnyHashable : Any], accountID: String, webFeedID: String, articleID: String) -> Bool {
guard let feedIdentifierUserInfo = userInfo[UserInfoKey.feedIdentifier] as? [AnyHashable : AnyHashable],
let feedIdentifier = FeedIdentifier(userInfo: feedIdentifierUserInfo),
let isShowingExtractedArticle = userInfo[UserInfoKey.isShowingExtractedArticle] as? Bool,
let articleWindowScrollY = userInfo[UserInfoKey.articleWindowScrollY] as? Int else {
return false
}
switch feedIdentifier {
case .script:
return false
case .smartFeed, .folder:
let found = deferSelectFeedAndArticle(feedIdentifier: feedIdentifier, articleID: articleID, isShowingExtractedArticle: isShowingExtractedArticle, articleWindowScrollY: articleWindowScrollY)
if found {
treeControllerDelegate.addFilterException(feedIdentifier)
}
return found
case .webFeed:
let found = deferSelectFeedAndArticle(feedIdentifier: feedIdentifier, articleID: articleID, isShowingExtractedArticle: isShowingExtractedArticle, articleWindowScrollY: articleWindowScrollY)
if found {
treeControllerDelegate.addFilterException(feedIdentifier)
if let webFeedNode = nodeFor(feedID: feedIdentifier), let folder = webFeedNode.parent?.representedObject as? Folder, let folderFeedID = folder.feedID {
treeControllerDelegate.addFilterException(folderFeedID)
}
}
return found
}
}
func findAccountNode(accountID: String, accountName: String? = nil) -> Node? {
if let node = treeController.rootNode.descendantNode(where: { ($0.representedObject as? Account)?.accountID == accountID }) {
return node
}
if let accountName = accountName, let node = treeController.rootNode.descendantNode(where: { ($0.representedObject as? Account)?.nameForDisplay == accountName }) {
return node
}
return nil
}
func findFolderNode(folderName: String, beginningAt startingNode: Node) -> Node? {
if let node = startingNode.descendantNode(where: { ($0.representedObject as? Folder)?.nameForDisplay == folderName }) {
return node
}
return nil
}
func findWebFeedNode(webFeedID: String, beginningAt startingNode: Node) -> Node? {
if let node = startingNode.descendantNode(where: { ($0.representedObject as? WebFeed)?.webFeedID == webFeedID }) {
return node
}
return nil
}
func deferSelectFeedAndArticle(feedIdentifier: FeedIdentifier, articleID: String, isShowingExtractedArticle: Bool, articleWindowScrollY: Int) -> Bool {
guard let feedNode = nodeFor(feedID: feedIdentifier), let feedIndexPath = indexPathFor(feedNode) else { return false }
if AccountManager.shared.isUnreadCountsInitialized {
selectFeed(indexPath: feedIndexPath) {
self.selectArticleInCurrentFeed(articleID, isShowingExtractedArticle: isShowingExtractedArticle, articleWindowScrollY: articleWindowScrollY)
}
} else {
deferredFeedAndArticleSelect = (feedIdentifier, articleID, isShowingExtractedArticle, articleWindowScrollY)
}
return true
}
}