real gifs!!

StickerSlack/Emoji/GifManager.swift

@@ -6,7 +6,37 @@
 //
 
 import Foundation
+import UIKit
 
 class GifManager {
+	static let defaultDuration: Double = 0.083333333333333329
+	static func gifFrom(url: URL) -> [(frame: CGImage, showFor: Double)] {
+//		let url = URL(string: "https://emoji.slack-edge.com/T0266FRGM/yay-bounce/046cfcc7ed81030f.gif")!
+//		guard let source = CGImageSourceCreateWithURL(url as CFURL, nil) else { fatalError("couldnt create source") }
+		
+		guard let data = try? Data(contentsOf: url) else { return [] }
+		
+		return gifFrom(data: data)
+	}
 	
+	static func gifFrom(data: Data) -> [(frame: CGImage, showFor: Double)] {
+		guard let source = CGImageSourceCreateWithData(data as NSData, nil) else { fatalError("couldnt create source") }
+		let frameCount = CGImageSourceGetCount(source)
+		var result: [(frame: CGImage, showFor: Double)] = []
+		
+		for i in 0..<frameCount {
+			guard let cgImage = CGImageSourceCreateImageAtIndex(source, i, nil) else {
+				print("AAAA")
+				continue
+			}
+			if let properties = CGImageSourceCopyPropertiesAtIndex(source, i, nil),
+			   let gifInfo = (properties as NSDictionary)[kCGImagePropertyGIFDictionary as String] as? NSDictionary,
+			   let frameDuration = (gifInfo[kCGImagePropertyGIFDelayTime as String] as? NSNumber) {
+				result.append((cgImage, frameDuration.doubleValue))
+			} else {
+				result.append((cgImage, defaultDuration))
+			}
+		}
+		return result
+	}
 }

StickerSlack/Emoji/GifView.swift

@@ -10,24 +10,44 @@ import UIKit
 import SwiftUI
 import WebKit
 
-struct GifView: UIViewRepresentable {
-	private let url: URL
+struct GifView: View {
+	@State var url: URL
+	@State var gif: [(frame: CGImage, showFor: Double)] = []
+	@State var currentI: Int = 0
+	@State var go: Bool = false
 	
-	init(url: URL) {
-		self.url = url
-	}
-	
-	func makeUIView(context: Context) -> WKWebView {
-		let webview = WKWebView()
-		
-		webview.allowsLinkPreview = false
-		webview.allowsBackForwardNavigationGestures = false
-		
-		webview.load(URLRequest(url: url))
-		return webview
-	}
-	
-	func updateUIView(_ uiView: WKWebView, context: Context) {
-		uiView.reload()
+	var body: some View {
+//		/*@START_MENU_TOKEN@*//*@PLACEHOLDER=Hello, world!@*/Text("Hello, world!")/*@END_MENU_TOKEN@*/
+		TimelineView(.animation) { tl in
+			VStack {
+				if currentI < gif.count {
+					let image = Image(uiImage: .init(cgImage: gif[currentI].frame))
+					image
+						.resizable().scaledToFit()
+				}
+			}
+		}
+		.onChange(of: go) { _ in
+			if currentI == (gif.count-1) {
+				currentI = 0
+			} else {
+				currentI += 1
+			}
+			DispatchQueue.main.asyncAfter(deadline: .now()+gif[currentI].showFor) {
+				go.toggle()
+			}
+		}
+		.onAppear {
+			self.gif = GifManager.gifFrom(url: url)
+			DispatchQueue.main.asyncAfter(deadline: .now()+gif[0].showFor) {
+				go.toggle()
+			}
+		}
 	}
 }
+
+#Preview {
+	GifView(
+		url: URL(string: "https://files.catbox.moe/3x5sea.gif")!
+	)
+}

StickerSlack/SwiftUI/Emoji/EmojiPreview.swift

@@ -23,14 +23,6 @@ struct EmojiPreview: View {
 			if let image = emoji.image {
 				if emoji.localImageURLString.contains(".gif") {
 					GifView(url: emoji.localImageURL)
-//					if let gifImage {
-//						gifImage
-//							.resizable().scaledToFit()
-//					} else {
-//						Text("uhhhh")
-//							.foregroundStyle(.red)
-//							.font(.largeTitle)
-//					}
 				} else {
 					Image(uiImage: image)
 						.resizable().scaledToFit()
@@ -58,19 +50,6 @@ struct EmojiPreview: View {
 				}
 			}
 		}
-//		.onAppear {
-//			guard emoji.localImageURLString.contains(".gif") else { return }
-//			gifImage = nil
-//			guard let gifData = try? Data(contentsOf: emoji.localImageURL) as CFData else { return }
-//			CGAnimateImageDataWithBlock(gifData, nil) { index, cgImage, stop in
-//				if stopPointer != stop {
-//					stopPointer?.pointee.toggle()
-//					stopPointer = stop
-//				}
-//				guard !stop.pointee else { return }
-//				gifImage = Image(uiImage: .init(cgImage: cgImage))
-//			}
-//		}
 		.id(id)
 	}
 }