365 lines
14 KiB
Swift
365 lines
14 KiB
Swift
//
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// MainTabBarViewController.swift
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// Tusker
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//
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// Created by Shadowfacts on 8/21/18.
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// Copyright © 2018 Shadowfacts. All rights reserved.
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//
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import UIKit
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import ComposeUI
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class MainTabBarViewController: UITabBarController, UITabBarControllerDelegate {
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weak var mastodonController: MastodonController!
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private var composePlaceholder: UIViewController!
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private var fastAccountSwitcher: FastAccountSwitcherViewController!
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private var fastSwitcherIndicator: FastAccountSwitcherIndicatorView!
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private var fastSwitcherConstraints: [NSLayoutConstraint] = []
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@available(iOS, obsoleted: 16.0)
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private var draftToPresentOnAppear: Draft?
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var selectedTab: Tab {
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return Tab(rawValue: selectedIndex)!
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}
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override var supportedInterfaceOrientations: UIInterfaceOrientationMask {
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if UIDevice.current.userInterfaceIdiom == .phone {
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return .portrait
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} else {
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return .all
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}
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}
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init(mastodonController: MastodonController) {
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self.mastodonController = mastodonController
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super.init(nibName: nil, bundle: nil)
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}
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required init?(coder: NSCoder) {
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fatalError("init(coder:) has not been implemented")
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}
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override func viewDidLoad() {
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super.viewDidLoad()
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stateRestorationLogger.info("MainTabBarViewController: viewDidLoad, selectedIndex=\(self.selectedIndex, privacy: .public)")
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self.delegate = self
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composePlaceholder = UIViewController()
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composePlaceholder.title = "Compose"
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composePlaceholder.tabBarItem.image = UIImage(systemName: "pencil")
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viewControllers = [
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embedInNavigationController(Tab.timelines.createViewController(mastodonController)),
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embedInNavigationController(Tab.notifications.createViewController(mastodonController)),
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composePlaceholder,
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embedInNavigationController(Tab.explore.createViewController(mastodonController)),
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embedInNavigationController(Tab.myProfile.createViewController(mastodonController)),
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]
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fastAccountSwitcher = FastAccountSwitcherViewController()
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fastAccountSwitcher.delegate = self
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fastAccountSwitcher.view.translatesAutoresizingMaskIntoConstraints = false
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tabBar.addGestureRecognizer(fastAccountSwitcher.createSwitcherGesture())
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let tapRecognizer = UITapGestureRecognizer(target: self, action: #selector(tabBarTapped))
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tapRecognizer.cancelsTouchesInView = false
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tabBar.addGestureRecognizer(tapRecognizer)
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if findMyProfileTabBarButton() != nil {
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fastSwitcherIndicator = FastAccountSwitcherIndicatorView()
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fastSwitcherIndicator.translatesAutoresizingMaskIntoConstraints = false
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view.addSubview(fastSwitcherIndicator)
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}
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tabBar.isSpringLoaded = true
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}
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override func viewWillAppear(_ animated: Bool) {
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super.viewWillAppear(animated)
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stateRestorationLogger.info("MainTabBarViewController: viewWillAppear, selectedIndex=\(self.selectedIndex, privacy: .public)")
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}
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override func viewDidAppear(_ animated: Bool) {
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super.viewDidAppear(animated)
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stateRestorationLogger.info("MainTabBarViewController: viewDidAppear, selectedIndex=\(self.selectedIndex, privacy: .public)")
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if let draftToPresentOnAppear {
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self.draftToPresentOnAppear = nil
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compose(editing: draftToPresentOnAppear, animated: true)
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}
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}
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override func viewDidLayoutSubviews() {
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super.viewDidLayoutSubviews()
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// i hate that we have to do this so often :S
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// but doing it only in viewWillAppear makes it not appear initially
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// doing it in viewWillAppear inside a DispatchQueue.main.async works initially but then it disappears when long-pressed
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repositionFastSwitcherIndicator()
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}
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override func traitCollectionDidChange(_ previousTraitCollection: UITraitCollection?) {
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super.traitCollectionDidChange(previousTraitCollection)
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repositionFastSwitcherIndicator()
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}
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func select(tab: Tab) {
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if tab == .compose {
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compose(editing: nil)
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} else {
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// when switching tabs, dismiss the currently presented VC
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// otherwise the selected tab changes behind the presented VC
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if presentedViewController != nil {
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dismiss(animated: true) {
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self.selectedIndex = tab.rawValue
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}
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} else {
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stateRestorationLogger.info("MainTabBarViewController: selecting \(String(describing: tab), privacy: .public)")
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selectedIndex = tab.rawValue
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}
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}
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}
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override func show(_ vc: UIViewController, sender: Any?) {
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if let nav = selectedViewController as? UINavigationController {
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nav.pushViewController(vc, animated: true)
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} else {
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present(vc, animated: true)
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}
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}
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private func repositionFastSwitcherIndicator() {
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guard let myProfileButton = findMyProfileTabBarButton() else {
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return
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}
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NSLayoutConstraint.deactivate(fastSwitcherConstraints)
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// using interfaceOrientation isn't ideal, but UITabBar buttons may lay out horizontally even in the compact size class
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if traitCollection.horizontalSizeClass == .compact && interfaceOrientation.isPortrait {
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fastSwitcherConstraints = [
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fastSwitcherIndicator.centerYAnchor.constraint(equalTo: myProfileButton.centerYAnchor, constant: -4),
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// tab bar button image width is 30
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fastSwitcherIndicator.leftAnchor.constraint(equalTo: myProfileButton.centerXAnchor, constant: 15 + 2),
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]
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} else {
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fastSwitcherConstraints = [
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fastSwitcherIndicator.centerYAnchor.constraint(equalTo: myProfileButton.centerYAnchor),
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fastSwitcherIndicator.trailingAnchor.constraint(equalTo: myProfileButton.trailingAnchor),
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]
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}
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NSLayoutConstraint.activate(fastSwitcherConstraints)
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}
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private func findMyProfileTabBarButton() -> UIView? {
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let tabBarButtons = tabBar.subviews.filter { String(describing: type(of: $0)).lowercased().contains("button") }
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// sanity check that there is 1 button per VC
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guard tabBarButtons.count == viewControllers!.count,
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let myProfileButton = tabBarButtons.last else {
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return nil
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}
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return myProfileButton
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}
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@objc private func tabBarTapped(_ recognizer: UITapGestureRecognizer) {
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fastAccountSwitcher.hide()
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}
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@objc func handleComposeKeyCommand() {
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compose(editing: nil)
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}
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func embedInNavigationController(_ vc: UIViewController) -> UINavigationController {
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if let vc = vc as? UINavigationController {
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return vc
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} else {
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let nav = EnhancedNavigationViewController(rootViewController: vc)
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// nav.useBrowserStyleNavigation = true
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return nav
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}
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}
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func tabBarController(_ tabBarController: UITabBarController, shouldSelect viewController: UIViewController) -> Bool {
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if viewController == composePlaceholder {
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compose(editing: nil)
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return false
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}
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if viewController == viewControllers![selectedIndex],
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let nav = viewController as? UINavigationController,
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nav.viewControllers.count == 1,
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let scrollableVC = nav.viewControllers.first as? TabBarScrollableViewController {
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scrollableVC.tabBarScrollToTop()
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return false
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}
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return true
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}
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func setViewController(_ viewController: UIViewController, forTab tab: Tab) {
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viewControllers![tab.rawValue] = viewController
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}
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func viewController(for tab: Tab) -> UIViewController {
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return viewControllers![tab.rawValue]
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}
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}
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extension MainTabBarViewController {
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enum Tab: Int, Hashable, CaseIterable {
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case timelines
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case notifications
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case compose
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case explore
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case myProfile
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func createViewController(_ mastodonController: MastodonController) -> UIViewController {
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switch self {
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case .timelines:
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return TimelinesPageViewController(mastodonController: mastodonController)
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case .notifications:
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return NotificationsPageViewController(mastodonController: mastodonController)
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case .compose:
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return ComposeHostingController(mastodonController: mastodonController)
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case .explore:
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return ExploreViewController(mastodonController: mastodonController)
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case .myProfile:
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return MyProfileViewController(mastodonController: mastodonController)
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}
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}
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}
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func getTabController(tab: Tab) -> UIViewController? {
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if tab == .compose {
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return nil
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} else {
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// viewWControllers array is setup in viewDidLoad
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loadViewIfNeeded()
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return viewControllers![tab.rawValue]
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}
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}
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}
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extension MainTabBarViewController: FastAccountSwitcherViewControllerDelegate {
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func fastAccountSwitcherAddToViewHierarchy(_ fastAccountSwitcher: FastAccountSwitcherViewController) {
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view.addSubview(fastAccountSwitcher.view)
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NSLayoutConstraint.activate([
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fastAccountSwitcher.accountsStack.bottomAnchor.constraint(equalTo: fastAccountSwitcher.view.bottomAnchor),
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fastAccountSwitcher.view.leadingAnchor.constraint(equalTo: view.leadingAnchor),
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fastAccountSwitcher.view.trailingAnchor.constraint(equalTo: view.trailingAnchor),
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fastAccountSwitcher.view.topAnchor.constraint(equalTo: view.topAnchor),
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fastAccountSwitcher.view.bottomAnchor.constraint(equalTo: tabBar.topAnchor),
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])
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}
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func fastAccountSwitcher(_ fastAccountSwitcher: FastAccountSwitcherViewController, triggerZoneContains point: CGPoint) -> Bool {
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guard let myProfileButton = findMyProfileTabBarButton() else {
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return false
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}
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let locationInButton = myProfileButton.convert(point, from: tabBar)
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return myProfileButton.bounds.contains(locationInButton)
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}
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}
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extension MainTabBarViewController: TuskerNavigationDelegate {
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var apiController: MastodonController! { mastodonController }
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}
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extension MainTabBarViewController: StateRestorableViewController {
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func stateRestorationActivity() -> NSUserActivity? {
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var activity: NSUserActivity?
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if let presentedNav = presentedViewController as? UINavigationController,
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let compose = presentedNav.viewControllers.first as? ComposeHostingController {
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activity = UserActivityManager.editDraftActivity(id: compose.draft.id, accountID: compose.draft.accountID)
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} else if let vc = (selectedViewController as! UINavigationController).topViewController as? StateRestorableViewController {
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activity = vc.stateRestorationActivity()
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}
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if activity == nil {
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stateRestorationLogger.fault("MainTabBarViewController: Unable to create state restoration activity, couldn't find StateRestorableViewController")
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}
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return activity
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}
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}
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extension MainTabBarViewController: TuskerRootViewController {
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func select(route: TuskerRoute, animated: Bool) {
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switch route {
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case .timelines:
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select(tab: .timelines)
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case .notifications:
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select(tab: .notifications)
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case .myProfile:
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select(tab: .myProfile)
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case .explore:
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select(tab: .explore)
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case .bookmarks:
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select(tab: .explore)
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getNavigationController().pushViewController(BookmarksViewController(mastodonController: mastodonController), animated: animated)
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case .list(id: let id):
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select(tab: .explore)
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if let list = mastodonController.getCachedList(id: id) {
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let nav = getNavigationController()
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_ = nav.popToRootViewController(animated: animated)
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nav.pushViewController(ListTimelineViewController(for: list, mastodonController: mastodonController), animated: animated)
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}
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}
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}
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func getNavigationDelegate() -> TuskerNavigationDelegate? {
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return self
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}
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func getNavigationController() -> NavigationControllerProtocol {
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return (selectedViewController as! UINavigationController)
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}
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func performSearch(query: String) {
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guard let exploreNavController = getTabController(tab: .explore) as? UINavigationController,
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let exploreController = exploreNavController.viewControllers.first as? ExploreViewController else {
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return
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}
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select(tab: .explore)
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exploreNavController.popToRootViewController(animated: false)
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// setting searchController.isActive directly doesn't work until the view has loaded/appeared for the first time
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if exploreController.isViewLoaded {
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exploreController.searchController.isActive = true
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} else {
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exploreController.searchControllerStatusOnAppearance = true
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// we still need to load the view so that we can setup the search query
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exploreController.loadViewIfNeeded()
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}
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exploreController.searchController.searchBar.text = query
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exploreController.resultsController.performSearch(query: query)
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}
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func presentPreferences(completion: (() -> Void)?) {
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present(PreferencesNavigationController(mastodonController: mastodonController), animated: true, completion: completion)
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}
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func handleStatusBarTapped(xPosition: CGFloat) -> StatusBarTapActionResult {
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guard presentedViewController == nil else {
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return .stop
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}
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guard let vc = viewController(for: selectedTab) as? StatusBarTappableViewController else {
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return .continue
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}
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return vc.handleStatusBarTapped(xPosition: xPosition)
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}
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}
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extension MainTabBarViewController: BackgroundableViewController {
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func sceneDidEnterBackground() {
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if let selectedVC = selectedViewController as? BackgroundableViewController {
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selectedVC.sceneDidEnterBackground()
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}
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}
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}
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