Replace Gifu with CGImageAnimation

Closes #44

.gitmodules

@@ -1,6 +1,3 @@
-[submodule "Gifu"]
-	path = Gifu
-	url = git://github.com/kaishin/Gifu.git
 [submodule "Embassy"]
 	path = Embassy
 	url = https://github.com/envoy/Embassy.git

Gifu

@@ -1 +0,0 @@
-Subproject commit 9b1a6461aa3b5f66cb0ed3a50c5523db0b4fb007

Tusker.xcodeproj/project.pbxproj

@@ -274,8 +274,6 @@
 		D6B81F3C2560365300F6E31D /* RefreshableViewController.swift in Sources */ = {isa = PBXBuildFile; fileRef = D6B81F3B2560365300F6E31D /* RefreshableViewController.swift */; };
 		D6B81F442560390300F6E31D /* MenuController.swift in Sources */ = {isa = PBXBuildFile; fileRef = D6B81F432560390300F6E31D /* MenuController.swift */; };
 		D6B8DB342182A59300424AF7 /* UIAlertController+Visibility.swift in Sources */ = {isa = PBXBuildFile; fileRef = D6B8DB332182A59300424AF7 /* UIAlertController+Visibility.swift */; };
-		D6BC874521961F73006163F1 /* Gifu.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = D6BC874421961F73006163F1 /* Gifu.framework */; };
-		D6BC874621961F73006163F1 /* Gifu.framework in Embed Frameworks */ = {isa = PBXBuildFile; fileRef = D6BC874421961F73006163F1 /* Gifu.framework */; settings = {ATTRIBUTES = (CodeSignOnCopy, RemoveHeadersOnCopy, ); }; };
 		D6BC8748219738E1006163F1 /* EnhancedTableViewController.swift in Sources */ = {isa = PBXBuildFile; fileRef = D6BC8747219738E1006163F1 /* EnhancedTableViewController.swift */; };
 		D6BC9DB1232C61BC002CA326 /* NotificationsPageViewController.swift in Sources */ = {isa = PBXBuildFile; fileRef = D6BC9DB0232C61BC002CA326 /* NotificationsPageViewController.swift */; };
 		D6BC9DB3232D4C07002CA326 /* WellnessPrefsView.swift in Sources */ = {isa = PBXBuildFile; fileRef = D6BC9DB2232D4C07002CA326 /* WellnessPrefsView.swift */; };
@@ -309,6 +307,7 @@
 		D6D4DDE5212518A200E1C4BB /* TuskerTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = D6D4DDE4212518A200E1C4BB /* TuskerTests.swift */; };
 		D6D4DDF0212518A200E1C4BB /* TuskerUITests.swift in Sources */ = {isa = PBXBuildFile; fileRef = D6D4DDEF212518A200E1C4BB /* TuskerUITests.swift */; };
 		D6DD2A3F273C1F4900386A6C /* ComposeAttachmentImage.swift in Sources */ = {isa = PBXBuildFile; fileRef = D6DD2A3E273C1F4900386A6C /* ComposeAttachmentImage.swift */; };
+		D6DD2A45273D6C5700386A6C /* GIFImageView.swift in Sources */ = {isa = PBXBuildFile; fileRef = D6DD2A44273D6C5700386A6C /* GIFImageView.swift */; };
 		D6DD353D22F28CD000A9563A /* ContentWarningCopyMode.swift in Sources */ = {isa = PBXBuildFile; fileRef = D6DD353C22F28CD000A9563A /* ContentWarningCopyMode.swift */; };
 		D6DD353F22F502EC00A9563A /* Preferences+Notification.swift in Sources */ = {isa = PBXBuildFile; fileRef = D6DD353E22F502EC00A9563A /* Preferences+Notification.swift */; };
 		D6DEA0DE268400C300FE896A /* ConfirmLoadMoreTableViewCell.swift in Sources */ = {isa = PBXBuildFile; fileRef = D6DEA0DC268400C300FE896A /* ConfirmLoadMoreTableViewCell.swift */; };
@@ -406,7 +405,6 @@
 			dstSubfolderSpec = 10;
 			files = (
 				D61099C12144B0CC00432DC2 /* Pachyderm.framework in Embed Frameworks */,
-				D6BC874621961F73006163F1 /* Gifu.framework in Embed Frameworks */,
 			);
 			name = "Embed Frameworks";
 			runOnlyForDeploymentPostprocessing = 0;
@@ -681,7 +679,6 @@
 		D6B81F3B2560365300F6E31D /* RefreshableViewController.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = RefreshableViewController.swift; sourceTree = "<group>"; };
 		D6B81F432560390300F6E31D /* MenuController.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = MenuController.swift; sourceTree = "<group>"; };
 		D6B8DB332182A59300424AF7 /* UIAlertController+Visibility.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = "UIAlertController+Visibility.swift"; sourceTree = "<group>"; };
-		D6BC874421961F73006163F1 /* Gifu.framework */ = {isa = PBXFileReference; explicitFileType = wrapper.framework; path = Gifu.framework; sourceTree = BUILT_PRODUCTS_DIR; };
 		D6BC8747219738E1006163F1 /* EnhancedTableViewController.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = EnhancedTableViewController.swift; sourceTree = "<group>"; };
 		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>"; };
@@ -721,6 +718,7 @@
 		D6D4DDEF212518A200E1C4BB /* TuskerUITests.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = TuskerUITests.swift; sourceTree = "<group>"; };
 		D6D4DDF1212518A200E1C4BB /* Info.plist */ = {isa = PBXFileReference; lastKnownFileType = text.plist.xml; path = Info.plist; sourceTree = "<group>"; };
 		D6DD2A3E273C1F4900386A6C /* ComposeAttachmentImage.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ComposeAttachmentImage.swift; sourceTree = "<group>"; };
+		D6DD2A44273D6C5700386A6C /* GIFImageView.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = GIFImageView.swift; sourceTree = "<group>"; };
 		D6DD353C22F28CD000A9563A /* ContentWarningCopyMode.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ContentWarningCopyMode.swift; sourceTree = "<group>"; };
 		D6DD353E22F502EC00A9563A /* Preferences+Notification.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = "Preferences+Notification.swift"; sourceTree = "<group>"; };
 		D6DEA0DC268400C300FE896A /* ConfirmLoadMoreTableViewCell.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ConfirmLoadMoreTableViewCell.swift; sourceTree = "<group>"; };
@@ -780,7 +778,6 @@
 				D61099C02144B0CC00432DC2 /* Pachyderm.framework in Frameworks */,
 				D6B0539F23BD2BA300A066FA /* SheetController in Frameworks */,
 				D69CCBBF249E6EFD000AF167 /* CrashReporter in Frameworks */,
-				D6BC874521961F73006163F1 /* Gifu.framework in Frameworks */,
 				D60CFFDB24A290BA00D00083 /* SwiftSoup in Frameworks */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
@@ -1480,6 +1477,7 @@
 				D6969E9F240C8384002843CE /* EmojiLabel.swift */,
 				D67C1794266D57D10070F250 /* FastAccountSwitcherIndicatorView.swift */,
 				D6EAE0DA2550CC8A002DB0AC /* FocusableTextField.swift */,
+				D6DD2A44273D6C5700386A6C /* GIFImageView.swift */,
 				D641C77E213DC78A004B4513 /* InlineTextAttachment.swift */,
 				D620483323D3801D008A63EF /* LinkTextView.swift */,
 				D68E6F58253C9969001A1B4C /* MultiSourceEmojiLabel.swift */,
@@ -1546,7 +1544,6 @@
 		D6D4DDC3212518A000E1C4BB = {
 			isa = PBXGroup;
 			children = (
-				D6BC874421961F73006163F1 /* Gifu.framework */,
 				D61099AC2144B0CC00432DC2 /* Pachyderm */,
 				D61099B92144B0CC00432DC2 /* PachydermTests */,
 				D6D4DDCE212518A000E1C4BB /* Tusker */,
@@ -2191,6 +2188,7 @@
 				D69693F42585941A00F4E116 /* UIWindowSceneDelegate+Close.swift in Sources */,
 				D6C143DA253510F4007DC240 /* ComposeEmojiTextField.swift in Sources */,
 				D6DD2A3F273C1F4900386A6C /* ComposeAttachmentImage.swift in Sources */,
+				D6DD2A45273D6C5700386A6C /* GIFImageView.swift in Sources */,
 				0427033822B30F5F000D31B6 /* BehaviorPrefsView.swift in Sources */,
 				D627943923A553B600D38C68 /* UnbookmarkStatusActivity.swift in Sources */,
 				D64D0AAD2128D88B005A6F37 /* LocalData.swift in Sources */,

Tusker.xcworkspace/contents.xcworkspacedata

@@ -7,9 +7,6 @@
    <FileRef
       location = "group:BlankSlate.xcappdata">
    </FileRef>
-   <FileRef
-      location = "group:Gifu/Gifu.xcodeproj">
-   </FileRef>
    <FileRef
       location = "group:Embassy/Embassy.xcodeproj">
    </FileRef>

Tusker/Screens/Attachment Gallery/AttachmentPreviewViewController.swift

@@ -8,7 +8,6 @@
 
 import UIKit
 import Pachyderm
-import Gifu
 
 class AttachmentPreviewViewController: UIViewController {
 

Tusker/Screens/Large Image/LargeImageContentView.swift

@@ -7,7 +7,6 @@
 //
 
 import UIKit
-import Gifu
 import Pachyderm
 import AVFoundation
 
@@ -18,10 +17,7 @@ protocol LargeImageContentView: UIView {
     func grayscaleStateChanged()
 }
 
-class LargeImageImageContentView: UIImageView, GIFAnimatable, LargeImageContentView {
+class LargeImageImageContentView: GIFImageView, LargeImageContentView {
-    lazy var animator: Animator? = {
-        return Animator(withDelegate: self)
-    }()
     
     var animationImage: UIImage? { image! }
     let animationGifData: Data?
@@ -54,12 +50,6 @@ class LargeImageImageContentView: UIImageView, GIFAnimatable, LargeImageContentV
         fatalError("init(coder:) has not been implemented")
     }
     
-    override public func display(_ layer: CALayer) {
-        super.display(layer)
-        
-        updateImageIfNeeded()
-    }
-    
     func grayscaleStateChanged() {
         guard let data = sourceData else {
             return

Tusker/Screens/Large Image/Transitions/LargeImageExpandAnimationController.swift

@@ -7,7 +7,6 @@
 //
 
 import UIKit
-import Gifu
 
 protocol LargeImageAnimatableViewController: UIViewController {
     var animationSourceView: UIImageView? { get }

Tusker/Screens/Large Image/Transitions/LargeImageShrinkAnimationController.swift

@@ -7,7 +7,6 @@
 //
 
 import UIKit
-import Gifu
 
 class LargeImageShrinkAnimationController: NSObject, UIViewControllerAnimatedTransitioning {
     

Tusker/Views/Attachments/AttachmentView.swift

@@ -8,7 +8,6 @@
 
 import UIKit
 import Pachyderm
-import Gifu
 import AVFoundation
 
 protocol AttachmentViewDelegate: AnyObject {
@@ -16,7 +15,7 @@ protocol AttachmentViewDelegate: AnyObject {
     func attachmentViewPresent(_ vc: UIViewController, animated: Bool)
 }
 
-class AttachmentView: UIImageView, GIFAnimatable {
+class AttachmentView: GIFImageView {
     
     weak var delegate: AttachmentViewDelegate?
 
@@ -44,8 +43,6 @@ class AttachmentView: UIImageView, GIFAnimatable {
     
     private var isGrayscale = false
 
-    public lazy var animator: Animator? = Animator(withDelegate: self)
-
     init(attachment: Attachment, index: Int, expectedSize: CGSize) {
         super.init(image: nil)
         commonInit()
@@ -293,12 +290,6 @@ class AttachmentView: UIImageView, GIFAnimatable {
         }
     }
     
-    override func display(_ layer: CALayer) {
-        super.display(layer)
-        
-        updateImageIfNeeded()
-    }
-    
     func showGallery() {
         if let delegate = delegate,
            let gallery = delegate.attachmentViewGallery(startingAt: index) {

Tusker/Views/GIFImageView.swift

@@ -0,0 +1,34 @@
+//
+//  GIFImageView.swift
+//  Tusker
+//
+//  Created by Shadowfacts on 11/11/21.
+//  Copyright © 2021 Shadowfacts. All rights reserved.
+//
+
+import UIKit
+
+class GIFImageView: UIImageView {
+    
+    private(set) var isAnimatingGIF: Bool = false
+    private var shouldStopAnimatingGIF = false
+    
+    
+    func animate(withGIFData data: Data) {
+        CGAnimateImageDataWithBlock(data as CFData, nil) { [weak self] (frameIndex, frame, stop) in
+            guard let self = self else {
+                stop.pointee = true
+                return
+            }
+            self.image = UIImage(cgImage: frame)
+            stop.pointee = self.shouldStopAnimatingGIF
+        }
+        isAnimatingGIF = true
+    }
+    
+    func stopAnimatingGIF() {
+        shouldStopAnimatingGIF = true
+        isAnimatingGIF = false
+    }
+    
+}