Feature: make Reader use center window

App/Scene Delegates/BrowserSceneDelegate.swift

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+//
+//  BrowserSceneDelegate.swift
+//  SBrowser
+//
+//  Created by James Magahern on 7/21/20.
+//
+
+import UIKit
+
+public enum SessionActivityType: String {
+    case BrowserWindow  = "net.buzzert.attractor.browser"
+    case SettingsWindow = "net.buzzert.attractor.settings"
+    case ReaderWindow   = "net.buzzert.attractor.reader"
+}
+
+class BrowserSceneDelegate: UIResponder, UIWindowSceneDelegate {
+    var window: UIWindow?
+    
+    var browserViewController: BrowserViewController?
+    var settingsViewController: SettingsViewController?
+
+    func scene(_ scene: UIScene, willConnectTo session: UISceneSession, options connectionOptions: UIScene.ConnectionOptions)
+    {
+        guard let windowScene = (scene as? UIWindowScene) else { return }
+        
+        let window = UIWindow(windowScene: windowScene)
+        let browserViewController = BrowserViewController()
+        self.browserViewController = browserViewController
+        window.rootViewController = browserViewController
+        
+        if let urlContext = connectionOptions.urlContexts.first {
+            let url = urlContext.url
+            browserViewController.tab.beginLoadingURL(url)
+        }
+        
+#if targetEnvironment(macCatalyst)
+        windowScene.titlebar?.titleVisibility = .hidden
+        windowScene.titlebar?.separatorStyle = .none
+            
+        if #available(macCatalyst 16.0, *) {
+            let screenSize = windowScene.screen.bounds.size
+            let preferredSize = CGSize(width: 1000, height: 1100)
+            let geometryPreferences = UIWindowScene.GeometryPreferences.Mac(systemFrame: CGRect(
+                origin: CGPoint(
+                    x: (screenSize.width - preferredSize.width) / 2,
+                    y: (screenSize.height - preferredSize.height) / 2
+                ),
+                
+                size: preferredSize
+            ))
+            windowScene.requestGeometryUpdate(geometryPreferences)
+        }
+#endif
+        
+        window.makeKeyAndVisible()
+        self.window = window
+    }
+    
+    func scene(_ scene: UIScene, openURLContexts URLContexts: Set<UIOpenURLContext>)
+    {
+        for urlContext in URLContexts {
+            if browserViewController?.tab.url == nil {
+                browserViewController?.tab.beginLoadingURL(urlContext.url)
+            } else {
+                browserViewController?.createNewTab(withURL: urlContext.url)
+            }
+        }
+    }
+}
+

App/Scene Delegates/ReaderSceneDelegate.swift

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+//
+//  ReaderSceneDelegate.swift
+//  App
+//
+//  Created by James Magahern on 8/22/22.
+//
+
+import UIKit
+
+internal enum ReaderUserActivityKeys: String {
+    case htmlString
+    case baseURL
+}
+
+class ReaderSceneDelegate: UIResponder, UIWindowSceneDelegate {
+    var window: UIWindow?
+    var readerViewController: ReaderViewController?
+
+    func scene(_ scene: UIScene, willConnectTo session: UISceneSession, options connectionOptions: UIScene.ConnectionOptions)
+    {
+        guard let windowScene = (scene as? UIWindowScene) else { return }
+        guard let activity = connectionOptions.userActivities.first else { return }
+        
+        guard let userInfo = activity.userInfo, let htmlString: String = userInfo[ReaderUserActivityKeys.htmlString.rawValue] as? String else { return }
+        let baseURL = userInfo[ReaderUserActivityKeys.baseURL.rawValue] as? URL
+        
+        let window = UIWindow(windowScene: windowScene)
+        
+        let readerViewController = ReaderViewController(readableHTMLString: htmlString, baseURL: baseURL)
+        readerViewController.title = activity.title
+        
+        self.readerViewController = readerViewController
+        window.rootViewController = UINavigationController(rootViewController: readerViewController)
+        
+        windowScene.title = activity.title ?? "Reader"
+        windowScene.sizeRestrictions?.maximumSize = CGSize(width: 700.0, height: 1000.0)
+        
+        window.makeKeyAndVisible()
+        self.window = window
+    }
+}

App/Scene Delegates/SettingsSceneDelegate.swift

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+//
+//  SettingsSceneDelegate.swift
+//  SBrowser
+//
+//  Copyright © 2021 Apple Inc. All rights reserved.
+//
+
+import UIKit
+
+class SettingsSceneDelegate: UIResponder, UIWindowSceneDelegate {
+    var window: UIWindow?
+    
+    var settingsViewController: SettingsViewController?
+
+    func scene(_ scene: UIScene, willConnectTo session: UISceneSession, options connectionOptions: UIScene.ConnectionOptions)
+    {
+        guard let windowScene = (scene as? UIWindowScene) else { return }
+        
+        let window = UIWindow(windowScene: windowScene)
+        let settingsViewController = SettingsViewController(windowScene: windowScene)
+        self.settingsViewController = settingsViewController
+        window.rootViewController = settingsViewController
+        windowScene.sizeRestrictions?.maximumSize = CGSize(width: 760.0, height: 400.0)
+        
+        window.makeKeyAndVisible()
+        self.window = window
+    }
+}