From 2323145e8321d0dcfc40d1f6c45c6390ec0deb0a Mon Sep 17 00:00:00 2001
From: Francisco Couceiro <francisco@appsconcept.eu>
Date: Mon, 14 Feb 2022 12:34:33 +0000
Subject: [PATCH] Decouple JellyGifOperation from Foundation.Operation

---
 JellyGif/Source/JellyGifAnimator.swift  |  6 +++---
 JellyGif/Source/JellyGifOperation.swift | 13 +++++++++----
 2 files changed, 12 insertions(+), 7 deletions(-)

diff --git a/JellyGif/Source/JellyGifAnimator.swift b/JellyGif/Source/JellyGifAnimator.swift
index 8cd9130..7e7748a 100644
--- a/JellyGif/Source/JellyGifAnimator.swift
+++ b/JellyGif/Source/JellyGifAnimator.swift
@@ -9,7 +9,7 @@
 import UIKit
 
 ///Methods for managing JellyGifAnimator
-public protocol JellyGifAnimatorDelegate: class {
+public protocol JellyGifAnimatorDelegate: AnyObject {
     func gifAnimatorIsReady(_ sender: JellyGifAnimator)
     
     ///Registers an UIImageView to display GIF frames
@@ -113,8 +113,8 @@ public class JellyGifAnimator {
             self?.preparingOperation = nil
         }
         
-        JellyGifAnimator.gifQueue.async {
-            self.preparingOperation?.start()
+        JellyGifAnimator.gifQueue.async { [weak self] in
+            self?.preparingOperation?.start()
         }
     }
     
diff --git a/JellyGif/Source/JellyGifOperation.swift b/JellyGif/Source/JellyGifOperation.swift
index 419cf83..459d529 100644
--- a/JellyGif/Source/JellyGifOperation.swift
+++ b/JellyGif/Source/JellyGifOperation.swift
@@ -9,21 +9,22 @@
 import UIKit
 
 ///An operation object used to prepare information needed to start GIF animation
-public class JellyGifOperation: Operation {
+public class JellyGifOperation {
     public let inputInfo: GifInfo
     public let pixelSize: GifPixelSize
     public var completionHandler: ([UIImage], [CFTimeInterval]) -> Void
 
+    private var isCancelled = false
+  
     public init(info: GifInfo, pixelSize: GifPixelSize,
          completion: @escaping ([UIImage], [CFTimeInterval]) -> Void) {
         self.inputInfo = info
         self.pixelSize = pixelSize
         self.completionHandler = completion
-        super.init()
     }
     
-    override public func main() {
-        guard isCancelled == false else { return }
+    public func start() {
+        guard self.isCancelled == false else { return }
         
         let imageSource = CGImageSource.sourceFromInfo(inputInfo)
         let frames = imageSource?.frameDurations ?? []
@@ -41,4 +42,8 @@ public class JellyGifOperation: Operation {
             self?.completionHandler(images, frames)
         }
     }
+  
+    public func cancel() {
+      self.isCancelled = true
+    }
 }