iOS: Fix crash showing share sheet on iPad

Embedding a UIHostingController inside a UIScrollView prevents
LazyVStack from working, causing very bad performance on some pages

BrowserCore/BrowserView.swift

@@ -39,6 +39,7 @@ public struct BrowserView: View {
                 Text("An error occurred")
                     .font(.headline)
                 Text(message)
+                    .lineLimit(nil)
             case let .document(doc):
                 DocumentView(document: doc, scrollingEnabled: scrollingEnabled, changeURL: navigator.changeURL)
                 Spacer()

BrowserCore/NavigationManager.swift

@@ -19,6 +19,14 @@ public class NavigationManager: NSObject, ObservableObject {
     @Published public var backStack = [URL]()
     @Published public var forwardStack = [URL]()
     
+    public var displayURL: String {
+        var components = URLComponents(url: currentURL, resolvingAgainstBaseURL: false)!
+        if components.port == 1965 {
+            components.port = nil
+        }
+        return components.string!
+    }
+    
     public init(url: URL) {
         self.currentURL = url
     }
@@ -30,9 +38,6 @@ public class NavigationManager: NSObject, ObservableObject {
                 delegate?.loadNonGeminiURL(url)
                 return
             }
-            if components.port == 1965 {
-                components.port = nil
-            }
         } else {
             components.scheme = "gemini"
         }
@@ -43,6 +48,11 @@ public class NavigationManager: NSObject, ObservableObject {
             components.path = "/"
         }
         
+        // Some Gemini servers break on empty paths
+        if components.path.isEmpty {
+            components.path = "/"
+        }
+        
         let url = components.url!
         
         backStack.append(currentURL)
@@ -61,10 +71,28 @@ public class NavigationManager: NSObject, ObservableObject {
         currentURL = backStack.removeLast()
     }
     
+    public func back(count: Int) {
+        guard count <= backStack.count else { return }
+        var removed = backStack.suffix(count)
+        backStack.removeLast(count)
+        forwardStack.insert(currentURL, at: 0)
+        currentURL = removed.removeFirst()
+        forwardStack.insert(contentsOf: removed, at: 0)
+    }
+    
     @objc public func forward() {
         guard !forwardStack.isEmpty else { return }
         backStack.append(currentURL)
         currentURL = forwardStack.removeFirst()
     }
     
+    public func forward(count: Int) {
+        guard count <= forwardStack.count else { return }
+        var removed = forwardStack.prefix(count)
+        forwardStack.removeFirst(count)
+        backStack.append(currentURL)
+        currentURL = removed.removeLast()
+        backStack.append(contentsOf: removed)
+    }
+    
 }

Gemini-iOS/ActivityView.swift

@@ -0,0 +1,24 @@
+//
+//  ActivityView.swift
+//  Gemini-iOS
+//
+//  Created by Shadowfacts on 9/30/20.
+//
+
+import SwiftUI
+
+struct ActivityView: UIViewControllerRepresentable {
+    typealias UIViewControllerType = UIActivityViewController
+    
+    let items: [Any]
+    let activities: [UIActivity]?
+    
+    func makeUIViewController(context: Context) -> UIActivityViewController {
+        return UIActivityViewController(activityItems: items, applicationActivities: activities)
+    }
+    
+    func updateUIViewController(_ uiViewController: UIActivityViewController, context: Context) {
+    }
+    
+    
+}

Gemini-iOS/BrowserViewController.swift

@@ -81,10 +81,7 @@ class BrowserViewController: UIViewController, UIScrollViewDelegate {
             navBarHost.view.topAnchor.constraint(equalTo: view.topAnchor),
         ])
         
-        toolBarHost = UIHostingController(rootView: ToolBar(navigator: navigator, shareCurrentURL: {
+        toolBarHost = UIHostingController(rootView: ToolBar(navigator: navigator))
-            let vc = UIActivityViewController(activityItems: [self.navigator.currentURL], applicationActivities: nil)
-            self.present(vc, animated: true)
-        }))
         toolBarHost.view.translatesAutoresizingMaskIntoConstraints = false
         view.addSubview(toolBarHost.view)
         addChild(toolBarHost)

Gemini-iOS/ContentView.swift

@@ -8,13 +8,9 @@
 import SwiftUI
 import BrowserCore
 
-// This is not currently used as SwiftUI's ScrollView has no mechanism for detecting when it stops deceleraing,
-// which is necessary to preven tthe bars from being left in a partially visible state.
 struct ContentView: View {
     @ObservedObject private var navigator: NavigationManager
     @State private var urlFieldContents: String
-    @State private var showPreferencesSheet = false
-    private let shareCurrentURL: () -> Void
     @State private var prevScrollOffset: CGFloat = 0
     @State private var scrollOffset: CGFloat = 0 {
         didSet {
@@ -24,11 +20,11 @@ struct ContentView: View {
     @State private var barOffset: CGFloat = 0
     @State private var navBarHeight: CGFloat = 0
     @State private var toolBarHeight: CGFloat = 0
+    @State private var showShareSheet = false
 
-    init(navigator: NavigationManager, shareCurrentURL: @escaping () -> Void) {
+    init(navigator: NavigationManager) {
         self.navigator = navigator
         self._urlFieldContents = State(initialValue: navigator.currentURL.absoluteString)
-        self.shareCurrentURL = shareCurrentURL
     }
     
     var body: some View {
@@ -52,11 +48,16 @@ struct ContentView: View {
                     // It's not actually user scrolling, and this screws up our animation, so we ignore it.
                     guard abs(delta) != outer.safeAreaInsets.top else { return }
                     
-                    if delta != 0 {
+                    if scrollOffset < 0 {
-                        barOffset += delta
+                        barOffset = 0
+                    } else {
+                        if delta != 0 {
+                            barOffset += delta
+                        }
+                        
+                        print(barOffset)
+                        barOffset = max(0, min(navBarHeight + outer.safeAreaInsets.top, barOffset))
                     }
-                    
-                    barOffset = max(0, min(navBarHeight + outer.safeAreaInsets.top, barOffset))
                 }
             }
             
@@ -66,10 +67,10 @@ struct ContentView: View {
                         Color.clear.preference(key: NavBarHeightPrefKey.self, value: geom.frame(in: .global).height)
                     })
                     .offset(y: -barOffset)
-                
+
                 Spacer()
                 
-                ToolBar(navigator: navigator, shareCurrentURL: shareCurrentURL)
+                ToolBar(navigator: navigator, showShareSheet: $showShareSheet)
                     .background(GeometryReader { (geom: GeometryProxy) in
                         Color.clear.preference(key: ToolBarHeightPrefKey.self, value: geom.frame(in: .global).height)
                     })
@@ -88,9 +89,9 @@ struct ContentView: View {
         .onReceive(navigator.$currentURL, perform: { (new) in
             urlFieldContents = new.absoluteString
         })
-        .sheet(isPresented: $showPreferencesSheet, content: {
+        .sheet(isPresented: $showShareSheet) {
-            PreferencesView(presented: $showPreferencesSheet)
+            ActivityView(items: [navigator.currentURL], activities: nil)
-        })
+        }
     }
     
     private func tweakAppearance() {
@@ -133,6 +134,6 @@ fileprivate enum ScrollDirection {
 
 struct ContentView_Previews: PreviewProvider {
     static var previews: some View {
-        ContentView(navigator: NavigationManager(url: URL(string: "gemini://localhost/overview.gmi")!), shareCurrentURL: {})
+        ContentView(navigator: NavigationManager(url: URL(string: "gemini://localhost/overview.gmi")!))
     }
 }

Gemini-iOS/NavigationBar.swift

@@ -16,7 +16,7 @@ struct NavigationBar: View {
     
     init(navigator: NavigationManager) {
         self.navigator = navigator
-        self._urlFieldContents = State(initialValue: navigator.currentURL.absoluteString)
+        self._urlFieldContents = State(initialValue: navigator.displayURL)
     }
     
     var body: some View {
@@ -33,8 +33,8 @@ struct NavigationBar: View {
                 .foregroundColor(Color(white: colorScheme == .dark ? 0.25 : 0.75))
         }
         .background(Color(UIColor.systemBackground).edgesIgnoringSafeArea(.top))
-        .onReceive(navigator.$currentURL) { (newURL) in
+        .onReceive(navigator.$currentURL) { (_) in
-            urlFieldContents = newURL.absoluteString
+            urlFieldContents = navigator.displayURL
         }
     }
     

Gemini-iOS/Preferences.swift

@@ -5,7 +5,7 @@
 //  Created by Shadowfacts on 9/27/20.
 //
 
-import Foundation
+import UIKit
 
 class Preferences: Codable, ObservableObject {
     
@@ -34,6 +34,8 @@ class Preferences: Codable, ObservableObject {
     required init(from decoder: Decoder) throws {
         let container = try decoder.container(keyedBy: CodingKeys.self)
         
+        theme = try container.decode(UIUserInterfaceStyle.self, forKey: .theme)
+        
         useInAppSafari = try container.decode(Bool.self, forKey: .useInAppSafari)
         useReaderMode = try container.decode(Bool.self, forKey: .useReaderMode)
     }
@@ -41,16 +43,25 @@ class Preferences: Codable, ObservableObject {
     func encode(to encoder: Encoder) throws {
         var container = encoder.container(keyedBy: CodingKeys.self)
         
+        try container.encode(theme, forKey: .theme)
+        
         try container.encode(useInAppSafari, forKey: .useInAppSafari)
         try container.encode(useReaderMode, forKey: .useReaderMode)
     }
     
+    @Published var theme = UIUserInterfaceStyle.unspecified
+    
     @Published var useInAppSafari = false
     @Published var useReaderMode = false
     
     enum CodingKeys: String, CodingKey {
+        case theme
+        
         case useInAppSafari
         case useReaderMode
     }
     
 }
+
+
+extension UIUserInterfaceStyle: Codable {}

Gemini-iOS/PreferencesView.swift

@@ -10,25 +10,41 @@ import SwiftUI
 struct PreferencesView: View {
     @ObservedObject var preferences: Preferences = .shared
     
-    @Binding var presented: Bool
+    @Environment(\.presentationMode) @Binding var presentationMode: PresentationMode
     
     var body: some View {
         NavigationView {
             List {
+                appearanceSection
+                
                 safariSection
             }
             .navigationBarTitle("Preferences")
             .insetOrGroupedListStyle()
             .navigationBarItems(trailing: doneButton)
         }
+        .onDisappear {
+            Preferences.save()
+        }
     }
     
     private var doneButton: some View {
         Button(action: {
-            presented = false
+            presentationMode.dismiss()
         }, label: {
             Text("Done")
         })
+        .hoverEffect(.highlight)
+    }
+    
+    private var appearanceSection: some View {
+        Section(header: Text("Appearance")) {
+            Picker(selection: $preferences.theme, label: Text("Theme")) {
+                Text("Use System Theme").tag(UIUserInterfaceStyle.unspecified)
+                Text("Always Light").tag(UIUserInterfaceStyle.light)
+                Text("Always Dark").tag(UIUserInterfaceStyle.dark)
+            }
+        }
     }
     
     private var safariSection: some View {
@@ -56,6 +72,6 @@ struct PreferencesView_Previews: PreviewProvider {
     @State static var presented = true
     
     static var previews: some View {
-        PreferencesView(presented: $presented)
+        PreferencesView()
     }
 }

Gemini-iOS/SceneDelegate.swift

@@ -9,12 +9,15 @@ import UIKit
 import SwiftUI
 import BrowserCore
 import SafariServices
+import Combine
 
 class SceneDelegate: UIResponder, UIWindowSceneDelegate {
 
     var window: UIWindow?
 
     var navigationManager: NavigationManager!
+    
+    private var cancellables = [AnyCancellable]()
 
     func scene(_ scene: UIScene, willConnectTo session: UISceneSession, options connectionOptions: UIScene.ConnectionOptions) {
         // Use this method to optionally configure and attach the UIWindow `window` to the provided UIWindowScene `scene`.
@@ -37,16 +40,23 @@ class SceneDelegate: UIResponder, UIWindowSceneDelegate {
         navigationManager.delegate = self
         
         // Create the SwiftUI view that provides the window contents.
-//        let contentView = ContentView(navigator: navigationManager, shareCurrentURL: self.shareCurrentURL)
+        let contentView = ContentView(navigator: navigationManager)
 
         // Use a UIHostingController as window root view controller.
         if let windowScene = scene as? UIWindowScene {
             let window = UIWindow(windowScene: windowScene)
-//            window.rootViewController = UIHostingController(rootView: contentView)
+            window.overrideUserInterfaceStyle = Preferences.shared.theme
-            window.rootViewController = BrowserViewController(navigator: navigationManager)
+            window.rootViewController = UIHostingController(rootView: contentView)
+//            window.rootViewController = BrowserViewController(navigator: navigationManager)
             self.window = window
             window.makeKeyAndVisible()
         }
+        
+        Preferences.shared.$theme
+            .sink { (newStyle) in
+                self.window!.overrideUserInterfaceStyle = newStyle
+            }
+            .store(in: &cancellables)
     }
     
     func scene(_ scene: UIScene, openURLContexts URLContexts: Set<UIOpenURLContext>) {
@@ -82,11 +92,6 @@ class SceneDelegate: UIResponder, UIWindowSceneDelegate {
         // Use this method to save data, release shared resources, and store enough scene-specific state information
         // to restore the scene back to its current state.
     }
-    
-    private func shareCurrentURL() {
-        let vc = UIActivityViewController(activityItems: [navigationManager.currentURL], applicationActivities: nil)
-        window?.rootViewController?.present(vc, animated: true)
-    }
 
 }
 

Gemini-iOS/ToolBar.swift

@@ -10,7 +10,7 @@ import BrowserCore
 
 struct ToolBar: View {
     @ObservedObject var navigator: NavigationManager
-    let shareCurrentURL: () -> Void
+    @Binding var showShareSheet: Bool
     @State private var showPreferencesSheet = false
     
     @Environment(\.colorScheme) var colorScheme: ColorScheme
@@ -30,6 +30,17 @@ struct ToolBar: View {
                         Image(systemName: "arrow.left")
                             .font(.system(size: 24))
                     }
+                    .accessibility(label: Text("Back"))
+                    .hoverEffect(.highlight)
+                    .contextMenu {
+                        ForEach(Array(navigator.backStack.suffix(5).enumerated()), id: \.1) { (index, url) in
+                            Button {
+                                navigator.back(count: min(5, navigator.backStack.count) - index)
+                            } label: {
+                                Text(verbatim: urlForDisplay(url))
+                            }
+                        }
+                    }
                     .disabled(navigator.backStack.isEmpty)
                     
                     Spacer()
@@ -38,6 +49,17 @@ struct ToolBar: View {
                         Image(systemName: "arrow.right")
                             .font(.system(size: 24))
                     }
+                    .accessibility(label: Text("Forward"))
+                    .hoverEffect(.highlight)
+                    .contextMenu {
+                        ForEach(navigator.forwardStack.prefix(5).enumerated().reversed(), id: \.1) { (index, url) in
+                            Button {
+                                navigator.forward(count: index + 1)
+                            } label: {
+                                Text(verbatim: urlForDisplay(url))
+                            }
+                        }
+                    }
                     .disabled(navigator.forwardStack.isEmpty)
                     
                     Spacer()
@@ -46,13 +68,19 @@ struct ToolBar: View {
                         Image(systemName: "arrow.clockwise")
                             .font(.system(size: 24))
                     }
+                    .accessibility(label: Text("Reload"))
+                    .hoverEffect(.highlight)
                     
                     Spacer()
                     
-                    Button(action: shareCurrentURL) {
+                    Button {
+                        showShareSheet = true
+                    } label: {
                         Image(systemName: "square.and.arrow.up")
                             .font(.system(size: 24))
                     }
+                    .accessibility(label: Text("Share"))
+                    .hoverEffect(.highlight)
                     
                     Spacer()
                     
@@ -62,22 +90,36 @@ struct ToolBar: View {
                         Image(systemName: "gear")
                             .font(.system(size: 24))
                     })
+                    .accessibility(label: Text("Preferences"))
+                    .hoverEffect(.highlight)
                 }
                 
                 Spacer()
             }
             
-            Spacer(minLength: 4)
         }
+        .padding(.bottom, 4)
         .background(Color(UIColor.systemBackground).edgesIgnoringSafeArea(.bottom))
         .sheet(isPresented: $showPreferencesSheet, content: {
-            PreferencesView(presented: $showPreferencesSheet)
+            PreferencesView()
         })
     }
+    
+    private func urlForDisplay(_ url: URL) -> String {
+        var str = url.host!
+        if let port = url.port,
+           url.scheme != "gemini" || port != 1965 {
+            str += ":\(port)"
+        }
+        str += url.path
+        return str
+    }
 }
 
 struct ToolBar_Previews: PreviewProvider {
+    @State private static var showShareSheet = false
+    
     static var previews: some View {
-        ToolBar(navigator: NavigationManager(url: URL(string: "gemini://localhost/overview.gmi")!), shareCurrentURL: {})
+        ToolBar(navigator: NavigationManager(url: URL(string: "gemini://localhost/overview.gmi")!), showShareSheet: $showShareSheet)
     }
 }

Gemini.xcodeproj/project.pbxproj

@@ -36,16 +36,17 @@
 		D62664EE24BC0BCE00DF9B88 /* MaybeLazyVStack.swift in Sources */ = {isa = PBXBuildFile; fileRef = D62664ED24BC0BCE00DF9B88 /* MaybeLazyVStack.swift */; };
 		D62664F024BC0D7700DF9B88 /* GeminiFormat.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = D62664A824BBF26A00DF9B88 /* GeminiFormat.framework */; };
 		D62664FA24BC12BC00DF9B88 /* DocumentTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = D62664F924BC12BC00DF9B88 /* DocumentTests.swift */; };
+		D62BCEE2252553620031D894 /* ActivityView.swift in Sources */ = {isa = PBXBuildFile; fileRef = D62BCEE1252553620031D894 /* ActivityView.swift */; };
 		D664673624BD07F700B0B741 /* RenderingBlock.swift in Sources */ = {isa = PBXBuildFile; fileRef = D664673524BD07F700B0B741 /* RenderingBlock.swift */; };
 		D664673824BD086F00B0B741 /* RenderingBlockView.swift in Sources */ = {isa = PBXBuildFile; fileRef = D664673724BD086F00B0B741 /* RenderingBlockView.swift */; };
 		D664673A24BD0B8E00B0B741 /* Fonts.swift in Sources */ = {isa = PBXBuildFile; fileRef = D664673924BD0B8E00B0B741 /* Fonts.swift */; };
 		D691A64E25217C6F00348C4B /* Preferences.swift in Sources */ = {isa = PBXBuildFile; fileRef = D691A64D25217C6F00348C4B /* Preferences.swift */; };
 		D691A66725217FD800348C4B /* PreferencesView.swift in Sources */ = {isa = PBXBuildFile; fileRef = D691A66625217FD800348C4B /* PreferencesView.swift */; };
-		D691A6772522382E00348C4B /* BrowserViewController.swift in Sources */ = {isa = PBXBuildFile; fileRef = D691A6762522382E00348C4B /* BrowserViewController.swift */; };
 		D691A68725223A4700348C4B /* NavigationBar.swift in Sources */ = {isa = PBXBuildFile; fileRef = D691A68625223A4600348C4B /* NavigationBar.swift */; };
 		D691A6A0252242FC00348C4B /* ToolBar.swift in Sources */ = {isa = PBXBuildFile; fileRef = D691A69F252242FC00348C4B /* ToolBar.swift */; };
 		D69F00AC24BE9DD300E37622 /* GeminiDataTask.swift in Sources */ = {isa = PBXBuildFile; fileRef = D69F00AB24BE9DD300E37622 /* GeminiDataTask.swift */; };
 		D69F00AE24BEA29100E37622 /* GeminiResponse.swift in Sources */ = {isa = PBXBuildFile; fileRef = D69F00AD24BEA29100E37622 /* GeminiResponse.swift */; };
+		D6DA5783252396030048B65A /* View+Extensions.swift in Sources */ = {isa = PBXBuildFile; fileRef = D6DA5782252396030048B65A /* View+Extensions.swift */; };
 		D6E1529824BFAAA400FDF9D3 /* BrowserWindowController.swift in Sources */ = {isa = PBXBuildFile; fileRef = D6E1529624BFAAA400FDF9D3 /* BrowserWindowController.swift */; };
 		D6E1529924BFAAA400FDF9D3 /* BrowserWindowController.xib in Resources */ = {isa = PBXBuildFile; fileRef = D6E1529724BFAAA400FDF9D3 /* BrowserWindowController.xib */; };
 		D6E1529B24BFAEC700FDF9D3 /* MainMenu.xib in Resources */ = {isa = PBXBuildFile; fileRef = D6E1529A24BFAEC700FDF9D3 /* MainMenu.xib */; };
@@ -293,6 +294,7 @@
 		D62664EB24BC0B4D00DF9B88 /* DocumentView.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = DocumentView.swift; sourceTree = "<group>"; };
 		D62664ED24BC0BCE00DF9B88 /* MaybeLazyVStack.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = MaybeLazyVStack.swift; sourceTree = "<group>"; };
 		D62664F924BC12BC00DF9B88 /* DocumentTests.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = DocumentTests.swift; sourceTree = "<group>"; };
+		D62BCEE1252553620031D894 /* ActivityView.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ActivityView.swift; sourceTree = "<group>"; };
 		D664673524BD07F700B0B741 /* RenderingBlock.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = RenderingBlock.swift; sourceTree = "<group>"; };
 		D664673724BD086F00B0B741 /* RenderingBlockView.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = RenderingBlockView.swift; sourceTree = "<group>"; };
 		D664673924BD0B8E00B0B741 /* Fonts.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = Fonts.swift; sourceTree = "<group>"; };
@@ -304,6 +306,7 @@
 		D69F00AB24BE9DD300E37622 /* GeminiDataTask.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = GeminiDataTask.swift; sourceTree = "<group>"; };
 		D69F00AD24BEA29100E37622 /* GeminiResponse.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = GeminiResponse.swift; sourceTree = "<group>"; };
 		D69F00AF24BEA84D00E37622 /* NavigationManager.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = NavigationManager.swift; sourceTree = "<group>"; };
+		D6DA5782252396030048B65A /* View+Extensions.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = "View+Extensions.swift"; sourceTree = "<group>"; };
 		D6E1529624BFAAA400FDF9D3 /* BrowserWindowController.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = BrowserWindowController.swift; sourceTree = "<group>"; };
 		D6E1529724BFAAA400FDF9D3 /* BrowserWindowController.xib */ = {isa = PBXFileReference; lastKnownFileType = file.xib; path = BrowserWindowController.xib; sourceTree = "<group>"; };
 		D6E1529A24BFAEC700FDF9D3 /* MainMenu.xib */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = file.xib; path = MainMenu.xib; sourceTree = "<group>"; };
@@ -526,6 +529,7 @@
 				D62664ED24BC0BCE00DF9B88 /* MaybeLazyVStack.swift */,
 				D62664EB24BC0B4D00DF9B88 /* DocumentView.swift */,
 				D664673724BD086F00B0B741 /* RenderingBlockView.swift */,
+				D6DA5782252396030048B65A /* View+Extensions.swift */,
 			);
 			path = GeminiRenderer;
 			sourceTree = "<group>";
@@ -557,6 +561,7 @@
 				D691A69F252242FC00348C4B /* ToolBar.swift */,
 				D691A64D25217C6F00348C4B /* Preferences.swift */,
 				D691A66625217FD800348C4B /* PreferencesView.swift */,
+				D62BCEE1252553620031D894 /* ActivityView.swift */,
 				D6E152AA24BFFDF600FDF9D3 /* Assets.xcassets */,
 				D6E152AF24BFFDF600FDF9D3 /* LaunchScreen.storyboard */,
 				D6E152B224BFFDF600FDF9D3 /* Info.plist */,
@@ -1042,6 +1047,7 @@
 				D664673A24BD0B8E00B0B741 /* Fonts.swift in Sources */,
 				D62664EE24BC0BCE00DF9B88 /* MaybeLazyVStack.swift in Sources */,
 				D62664EC24BC0B4D00DF9B88 /* DocumentView.swift in Sources */,
+				D6DA5783252396030048B65A /* View+Extensions.swift in Sources */,
 				D664673824BD086F00B0B741 /* RenderingBlockView.swift in Sources */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
@@ -1059,10 +1065,10 @@
 			buildActionMask = 2147483647;
 			files = (
 				D691A66725217FD800348C4B /* PreferencesView.swift in Sources */,
-				D691A6772522382E00348C4B /* BrowserViewController.swift in Sources */,
 				D6E152A524BFFDF500FDF9D3 /* AppDelegate.swift in Sources */,
 				D691A6A0252242FC00348C4B /* ToolBar.swift in Sources */,
 				D6E152A724BFFDF500FDF9D3 /* SceneDelegate.swift in Sources */,
+				D62BCEE2252553620031D894 /* ActivityView.swift in Sources */,
 				D691A68725223A4700348C4B /* NavigationBar.swift in Sources */,
 				D691A64E25217C6F00348C4B /* Preferences.swift in Sources */,
 				D6E152A924BFFDF500FDF9D3 /* ContentView.swift in Sources */,
@@ -1325,7 +1331,7 @@
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
 				ASSETCATALOG_COMPILER_GLOBAL_ACCENT_COLOR_NAME = AccentColor;
 				CODE_SIGN_ENTITLEMENTS = Gemini/Gemini.entitlements;
-				CODE_SIGN_IDENTITY = "-";
+				CODE_SIGN_IDENTITY = "Apple Development";
 				CODE_SIGN_STYLE = Automatic;
 				COMBINE_HIDPI_IMAGES = YES;
 				DEVELOPMENT_ASSET_PATHS = "\"Gemini/Preview Content\"";
@@ -1351,7 +1357,7 @@
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
 				ASSETCATALOG_COMPILER_GLOBAL_ACCENT_COLOR_NAME = AccentColor;
 				CODE_SIGN_ENTITLEMENTS = Gemini/Gemini.entitlements;
-				CODE_SIGN_IDENTITY = "-";
+				CODE_SIGN_IDENTITY = "Apple Development";
 				CODE_SIGN_STYLE = Automatic;
 				COMBINE_HIDPI_IMAGES = YES;
 				DEVELOPMENT_ASSET_PATHS = "\"Gemini/Preview Content\"";
@@ -1692,7 +1698,7 @@
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
 				ASSETCATALOG_COMPILER_GLOBAL_ACCENT_COLOR_NAME = AccentColor;
 				CODE_SIGN_STYLE = Automatic;
-				CURRENT_PROJECT_VERSION = 2;
+				CURRENT_PROJECT_VERSION = 3;
 				DEVELOPMENT_ASSET_PATHS = "\"Gemini-iOS/Preview Content\"";
 				DEVELOPMENT_TEAM = V4WK9KR9U2;
 				ENABLE_PREVIEWS = YES;
@@ -1718,7 +1724,7 @@
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
 				ASSETCATALOG_COMPILER_GLOBAL_ACCENT_COLOR_NAME = AccentColor;
 				CODE_SIGN_STYLE = Automatic;
-				CURRENT_PROJECT_VERSION = 2;
+				CURRENT_PROJECT_VERSION = 3;
 				DEVELOPMENT_ASSET_PATHS = "\"Gemini-iOS/Preview Content\"";
 				DEVELOPMENT_TEAM = V4WK9KR9U2;
 				ENABLE_PREVIEWS = YES;

Gemini.xcodeproj/xcshareddata/xcschemes/Gemini-iOS.xcscheme

@@ -59,7 +59,7 @@
          <EnvironmentVariable
             key = "DEFAULT_URL"
             value = "gemini://drewdevault.com"
-            isEnabled = "YES">
+            isEnabled = "NO">
          </EnvironmentVariable>
       </EnvironmentVariables>
    </LaunchAction>

Gemini.xcodeproj/xcuserdata/shadowfacts.xcuserdatad/xcschemes/xcschememanagement.plist

@@ -27,12 +27,12 @@
 		<key>GeminiProtocol.xcscheme_^#shared#^_</key>
 		<dict>
 			<key>orderHint</key>
-			<integer>3</integer>
+			<integer>4</integer>
 		</dict>
 		<key>GeminiRenderer.xcscheme_^#shared#^_</key>
 		<dict>
 			<key>orderHint</key>
-			<integer>4</integer>
+			<integer>3</integer>
 		</dict>
 	</dict>
 	<key>SuppressBuildableAutocreation</key>

Gemini/BrowserWindowController.swift

@@ -108,8 +108,8 @@ extension BrowserWindowController: NSToolbarDelegate {
         item.label = "Go Back"
         item.paletteLabel = "Go Back"
         item.toolTip = "Go to the previous page"
-        item.target = navigator
+        item.target = self
-        item.action = #selector(NavigationManager.back)
+        item.action = #selector(back)
         item.isBordered = true
         if #available(macOS 10.16, *) {
             item.isNavigational = true
@@ -127,8 +127,8 @@ extension BrowserWindowController: NSToolbarDelegate {
         item.label = "Go Forward"
         item.paletteLabel = "Go Forward"
         item.toolTip = "Go to the next page"
-        item.target = navigator
+        item.target = self
-        item.action = #selector(NavigationManager.forward)
+        item.action = #selector(forward)
         item.isBordered = true
         if #available(macOS 10.16, *) {
             item.isNavigational = true
@@ -136,14 +136,22 @@ extension BrowserWindowController: NSToolbarDelegate {
         return item
     }
     
+    @objc private func back() {
+        navigator.back()
+    }
+    
+    @objc private func forward() {
+        navigator.forward()
+    }
+    
 }
 
-extension NavigationManager: NSToolbarItemValidation {
+extension BrowserWindowController: NSToolbarItemValidation {
     public func validateToolbarItem(_ item: NSToolbarItem) -> Bool {
         if item.itemIdentifier == .goBack {
-            return !backStack.isEmpty
+            return !navigator.backStack.isEmpty
         } else if item.itemIdentifier == .goForward {
-            return !forwardStack.isEmpty
+            return !navigator.forwardStack.isEmpty
         } else {
             return true
         }

GeminiRenderer/DocumentView.swift

@@ -35,7 +35,7 @@ public struct DocumentView: View {
     private var scrollBody: some View {
         MaybeLazyVStack(alignment: .leading) {
             ForEach(blocks.indices) { (index) in
-                RenderingBlockView(block: blocks[index], changeURL: changeURL)
+                RenderingBlockView(document: document, block: blocks[index], changeURL: changeURL)
             }
         }.padding([.leading, .trailing, .bottom])
     }

GeminiRenderer/RenderingBlockView.swift

@@ -9,11 +9,15 @@ import SwiftUI
 import GeminiFormat
 
 struct RenderingBlockView: View {
+    let document: Document
     let block: RenderingBlock
     let changeURL: ((URL) -> Void)?
     @State var hovering = false
     
-    init(block: RenderingBlock, changeURL: ((URL) -> Void)? = nil) {
+    @Environment(\.colorScheme) var colorScheme: ColorScheme
+    
+    init(document: Document, block: RenderingBlock, changeURL: ((URL) -> Void)? = nil) {
+        self.document = document
         self.block = block
         self.changeURL = changeURL
     }
@@ -37,7 +41,7 @@ struct RenderingBlockView: View {
     }
     
     private func text(_ text: String) -> some View {
-        Text(text)
+        Text(verbatim: text)
             .font(.documentBody)
             .frame(maxWidth: .infinity, alignment: .leading)
     }
@@ -51,24 +55,50 @@ struct RenderingBlockView: View {
             let buttonStyle = PlainButtonStyle()
         #endif
         
+        let imageName: String
+        if url.scheme == "gemini" {
+            if url.host == document.url.host {
+                imageName = "arrow.right"
+            } else {
+                imageName = "link"
+            }
+        } else if url.scheme == "http" || url.scheme == "https" {
+            imageName = "safari"
+        } else if url.scheme == "mailto" {
+            imageName = "envelope"
+        } else {
+            imageName = "arrow.up.left.square"
+        }
+        
         let button: some View = Button {
             self.changeURL?(url)
         } label: {
-            Text(verbatim: text)
+            HStack(alignment: .firstTextBaseline, spacing: 4) {
-                .font(.documentBody)
+                maybeLinkImage(name: imageName)
-                .foregroundColor(hovering ? .blue : Color.blue.opacity(0.8))
+                
-                .underline()
+                Text(verbatim: text)
-                .frame(maxWidth: .infinity, alignment: .leading)
+                    .font(.documentBody)
+                    .foregroundColor(colorScheme == .dark ?
+                                        hovering ? Color.blue.opacity(0.8) : .blue :
+                                        hovering ? .blue : Color.blue.opacity(0.8))
+                    .underline()
+                    .frame(maxWidth: .infinity, alignment: .leading)
+            }
         }
             .buttonStyle(buttonStyle)
             .onHover { hovering in
                 self.hovering = hovering
             }
         
-        if #available(macOS 10.16, iOS 14.0, *) {
+        return button.maybeHelp(url.absoluteString)
-            return AnyView(button.help(url.absoluteString))
+    }
+    
+    private func maybeLinkImage(name: String) -> AnyView {
+        // can't use availability check inside view body, since buildLimitedAvailability was introduced in iOS 14 :/
+        if #available(iOS 13.0, macOS 11.0, *) {
+            return AnyView(Image(systemName: name).frame(minWidth: 23, alignment: .leading))
         } else {
-            return AnyView(button)
+            return AnyView(EmptyView())
         }
     }
     
@@ -109,10 +139,12 @@ struct RenderingBlockView: View {
 }
 
 struct RenderingBlockView_Previews: PreviewProvider {
+    static let doc = Document(url: URL(string: "gemini://localhost/test.gmi")!, lines: [.text("Some Text"), .quote("A Quote")])
+    
     static var previews: some View {
         Group {
-            RenderingBlockView(block: .text("Some Text"))
+            RenderingBlockView(document: doc, block: .text("Some Text"))
-            RenderingBlockView(block: .quote("A Quote"))
+            RenderingBlockView(document: doc, block: .quote("A Quote"))
         }
     }
 }

GeminiRenderer/View+Extensions.swift

@@ -0,0 +1,21 @@
+//
+//  View+Extensions.swift
+//  GeminiRenderer
+//
+//  Created by Shadowfacts on 9/29/20.
+//
+
+import SwiftUI
+
+extension View {
+    
+    @ViewBuilder
+    func maybeHelp(_ help: String) -> some View {
+        if #available(iOS 14.0, macOS 11.0, *) {
+            self.help(help)
+        } else {
+            self
+        }
+    }
+    
+}