Add preference to disable gif animation in timelines

Tusker/Preferences/Preferences.swift

@@ -48,6 +48,7 @@ class Preferences: Codable, ObservableObject {
         self.contentWarningCopyMode = try container.decode(ContentWarningCopyMode.self, forKey: .contentWarningCopyMode)
         self.mentionReblogger = try container.decode(Bool.self, forKey: .mentionReblogger)
         self.blurAllMedia = try container.decode(Bool.self, forKey: .blurAllMedia)
+        self.automaticallyPlayGifs = try container.decode(Bool.self, forKey: .automaticallyPlayGifs)
         self.openLinksInApps = try container.decode(Bool.self, forKey: .openLinksInApps)
         self.useInAppSafari = try container.decode(Bool.self, forKey: .useInAppSafari)
         self.inAppSafariAutomaticReaderMode = try container.decode(Bool.self, forKey: .inAppSafariAutomaticReaderMode)
@@ -73,6 +74,7 @@ class Preferences: Codable, ObservableObject {
         try container.encode(contentWarningCopyMode, forKey: .contentWarningCopyMode)
         try container.encode(mentionReblogger, forKey: .mentionReblogger)
         try container.encode(blurAllMedia, forKey: .blurAllMedia)
+        try container.encode(automaticallyPlayGifs, forKey: .automaticallyPlayGifs)
         try container.encode(openLinksInApps, forKey: .openLinksInApps)
         try container.encode(useInAppSafari, forKey: .useInAppSafari)
         try container.encode(inAppSafariAutomaticReaderMode, forKey: .inAppSafariAutomaticReaderMode)
@@ -97,6 +99,7 @@ class Preferences: Codable, ObservableObject {
     @Published var contentWarningCopyMode = ContentWarningCopyMode.asIs
     @Published var mentionReblogger = false
     @Published var blurAllMedia = false
+    @Published var automaticallyPlayGifs = true
     @Published var openLinksInApps = true
     @Published var useInAppSafari = true
     @Published var inAppSafariAutomaticReaderMode = false
@@ -121,6 +124,7 @@ class Preferences: Codable, ObservableObject {
         case contentWarningCopyMode
         case mentionReblogger
         case blurAllMedia
+        case automaticallyPlayGifs
         case openLinksInApps
         case useInAppSafari
         case inAppSafariAutomaticReaderMode

Tusker/Screens/Preferences/BehaviorPrefsView.swift

@@ -60,6 +60,9 @@ struct BehaviorPrefsView: View {
             Toggle(isOn: $preferences.blurAllMedia) {
                 Text("Blur All Media")
             }
+            Toggle(isOn: $preferences.automaticallyPlayGifs) {
+                Text("Automatically Play GIFs")
+            }
         }
     }
     

Tusker/Views/Attachments/AttachmentView.swift

@@ -54,6 +54,17 @@ class AttachmentView: UIImageView, GIFAnimatable {
         isUserInteractionEnabled = true
         addGestureRecognizer(UITapGestureRecognizer(target: self, action: #selector(imagePressed)))
         
+        NotificationCenter.default.addObserver(self, selector: #selector(preferencesChanged), name: .preferencesChanged, object: nil)
+    }
+    
+    @objc func preferencesChanged() {
+        if let gifData = gifData {
+            if Preferences.shared.automaticallyPlayGifs && !isAnimatingGIF {
+                animate(withGIFData: gifData)
+            } else if !Preferences.shared.automaticallyPlayGifs && isAnimatingGIF {
+                stopAnimatingGIF()
+            }
+        }
     }
     
     func loadAttachment() {
@@ -78,8 +89,12 @@ class AttachmentView: UIImageView, GIFAnimatable {
             self.attachmentRequest = nil
             DispatchQueue.main.async {
                 if self.attachment.url.pathExtension == "gif" {
-                    self.animate(withGIFData: data)
                     self.gifData = data
+                    if Preferences.shared.automaticallyPlayGifs {
+                        self.animate(withGIFData: data)
+                    } else {
+                        self.image = UIImage(data: data)
+                    }
                 } else {
                     self.image = UIImage(data: data)
                 }