Don't allow swiping in SegmentedPageViewController

Closes #46

Tusker.xcodeproj/project.pbxproj

@@ -169,6 +169,7 @@
 		D6BC9DB1232C61BC002CA326 /* NotificationsPageViewController.swift in Sources */ = {isa = PBXBuildFile; fileRef = D6BC9DB0232C61BC002CA326 /* NotificationsPageViewController.swift */; };
 		D6BC9DB3232D4C07002CA326 /* WellnessPrefsView.swift in Sources */ = {isa = PBXBuildFile; fileRef = D6BC9DB2232D4C07002CA326 /* WellnessPrefsView.swift */; };
 		D6BC9DB5232D4CE3002CA326 /* NotificationsMode.swift in Sources */ = {isa = PBXBuildFile; fileRef = D6BC9DB4232D4CE3002CA326 /* NotificationsMode.swift */; };
+		D6BC9DD7232D7811002CA326 /* TimelinesPageViewController.swift in Sources */ = {isa = PBXBuildFile; fileRef = D6BC9DD6232D7811002CA326 /* TimelinesPageViewController.swift */; };
 		D6BED170212663DA00F02DA0 /* SwiftSoup.framework in Embed Frameworks */ = {isa = PBXBuildFile; fileRef = D6BED16E212663DA00F02DA0 /* SwiftSoup.framework */; settings = {ATTRIBUTES = (CodeSignOnCopy, RemoveHeadersOnCopy, ); }; };
 		D6BED174212667E900F02DA0 /* StatusTableViewCell.swift in Sources */ = {isa = PBXBuildFile; fileRef = D6BED173212667E900F02DA0 /* StatusTableViewCell.swift */; };
 		D6C693EF216192C2007D6A6D /* TuskerNavigationDelegate.swift in Sources */ = {isa = PBXBuildFile; fileRef = D6C693EE216192C2007D6A6D /* TuskerNavigationDelegate.swift */; };
@@ -418,6 +419,7 @@
 		D6BC9DB0232C61BC002CA326 /* NotificationsPageViewController.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = NotificationsPageViewController.swift; sourceTree = "<group>"; };
 		D6BC9DB2232D4C07002CA326 /* WellnessPrefsView.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = WellnessPrefsView.swift; sourceTree = "<group>"; };
 		D6BC9DB4232D4CE3002CA326 /* NotificationsMode.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = NotificationsMode.swift; sourceTree = "<group>"; };
+		D6BC9DD6232D7811002CA326 /* TimelinesPageViewController.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = TimelinesPageViewController.swift; sourceTree = "<group>"; };
 		D6BED16E212663DA00F02DA0 /* SwiftSoup.framework */ = {isa = PBXFileReference; explicitFileType = wrapper.framework; path = SwiftSoup.framework; sourceTree = BUILT_PRODUCTS_DIR; };
 		D6BED173212667E900F02DA0 /* StatusTableViewCell.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = StatusTableViewCell.swift; sourceTree = "<group>"; };
 		D6C693EE216192C2007D6A6D /* TuskerNavigationDelegate.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = TuskerNavigationDelegate.swift; sourceTree = "<group>"; };
@@ -702,6 +704,7 @@
 		D641C781213DD7DD004B4513 /* Timeline */ = {
 			isa = PBXGroup;
 			children = (
+				D6BC9DD6232D7811002CA326 /* TimelinesPageViewController.swift */,
 				D6F953EB212519E700CF0F2B /* TimelineTableViewController.swift */,
 			);
 			path = Timeline;
@@ -1517,6 +1520,7 @@
 				0411610022B442870030A9B7 /* AttachmentViewController.swift in Sources */,
 				D62D2426217ABF63005076CC /* UserActivityType.swift in Sources */,
 				D66362712136338600C9CBA2 /* ComposeViewController.swift in Sources */,
+				D6BC9DD7232D7811002CA326 /* TimelinesPageViewController.swift in Sources */,
 				D6028B9B2150811100F223B9 /* MastodonCache.swift in Sources */,
 				D6A3BC802321B7E600FD64D5 /* FollowNotificationGroupTableViewCell.swift in Sources */,
 				D62D2422217AA7E1005076CC /* UserActivityManager.swift in Sources */,

Tusker/Screens/Main/MainTabBarViewController.swift

@@ -16,10 +16,9 @@ class MainTabBarViewController: UITabBarController, UITabBarControllerDelegate {
         self.delegate = self
         
         viewControllers = [
-            embedInNavigationController(TimelineTableViewController(for: .home)),
+            embedInNavigationController(TimelinesPageViewController()),
             embedInNavigationController(NotificationsPageViewController()),
             ComposeViewController(),
-            embedInNavigationController(TimelineTableViewController(for: .public(local: false))),
             embedInNavigationController(MyProfileTableViewController()),
         ]
     }

Tusker/Screens/Timeline/TimelinesPageViewController.swift

@@ -0,0 +1,45 @@
+//
+//  TimelinesPageViewController.swift
+//  Tusker
+//
+//  Created by Shadowfacts on 9/14/19.
+//  Copyright © 2019 Shadowfacts. All rights reserved.
+//
+
+import UIKit
+
+class TimelinesPageViewController: SegmentedPageViewController {
+
+    private let homeTitle = NSLocalizedString("Home", comment: "home timeline tab title")
+    private let federatedTitle = NSLocalizedString("Federated", comment: "federated timeline tab title")
+    private let localTitle = NSLocalizedString("Local", comment: "local timeline tab title")
+    
+    init() {
+        let home = TimelineTableViewController(for: .home)
+        home.title = homeTitle
+        
+        let federated = TimelineTableViewController(for: .public(local: false))
+        federated.title = federatedTitle
+        
+        let local = TimelineTableViewController(for: .public(local: true))
+        local.title = localTitle
+        
+        super.init(titles: [
+            homeTitle,
+            federatedTitle,
+            localTitle
+        ], pageControllers: [
+            home,
+            federated,
+            local
+        ])
+        
+        title = homeTitle
+        tabBarItem.image = UIImage(systemName: "house.fill")
+    }
+    
+    required init?(coder: NSCoder) {
+        fatalError("init(coder:) has not been implemented")
+    }
+
+}

Tusker/Screens/Utilities/SegmentedPageViewController.swift

@@ -8,7 +8,7 @@
 
 import UIKit
 
-class SegmentedPageViewController: UIPageViewController, UIPageViewControllerDataSource, UIPageViewControllerDelegate {
+class SegmentedPageViewController: UIPageViewController, UIPageViewControllerDelegate {
 
     let titles: [String]
     let pageControllers: [UIViewController]
@@ -23,7 +23,6 @@ class SegmentedPageViewController: UIPageViewController, UIPageViewControllerDat
         
         super.init(transitionStyle: .scroll, navigationOrientation: .horizontal, options: nil)
 
-        self.dataSource = self
         self.delegate = self
     }
     
@@ -54,20 +53,7 @@ class SegmentedPageViewController: UIPageViewController, UIPageViewControllerDat
     @objc func segmentedControlChanged() {
         selectPage(at: segmentedControl.selectedSegmentIndex, animated: true)
     }
-    
-    // MARK: - Page View Controller Data Source
-    func pageViewController(_ pageViewController: UIPageViewController, viewControllerBefore viewController: UIViewController) -> UIViewController? {
-        guard let index = pageControllers.firstIndex(of: viewController),
-            index > 0 else { return nil }
-        return pageControllers[index - 1]
-    }
-    
-    func pageViewController(_ pageViewController: UIPageViewController, viewControllerAfter viewController: UIViewController) -> UIViewController? {
-        guard let index = pageControllers.firstIndex(of: viewController),
-            index < pageControllers.count - 1 else { return nil }
-        return pageControllers[index + 1]
-    }
-    
+
     // MARK: - Page View Controller Delegate
     func pageViewController(_ pageViewController: UIPageViewController, didFinishAnimating finished: Bool, previousViewControllers: [UIViewController], transitionCompleted completed: Bool) {
         currentIndex = pageControllers.firstIndex(of: viewControllers!.first!)!