From 53ddac7c142824e3bc375d49274b0b296b289cca Mon Sep 17 00:00:00 2001
From: Ilya Laktyushin <ilya@laktyush.in>
Date: Thu, 18 May 2023 03:08:05 +0400
Subject: [PATCH] Fix managed animation frame advancement

---
 .../Sources/ManagedAnimationNode.swift               | 12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

diff --git a/submodules/ManagedAnimationNode/Sources/ManagedAnimationNode.swift b/submodules/ManagedAnimationNode/Sources/ManagedAnimationNode.swift
index 914f8c2279..2343704a2b 100644
--- a/submodules/ManagedAnimationNode/Sources/ManagedAnimationNode.swift
+++ b/submodules/ManagedAnimationNode/Sources/ManagedAnimationNode.swift
@@ -190,13 +190,18 @@ open class ManagedAnimationNode: ASDisplayNode {
         
         self.addSubnode(self.imageNode)
         
-        var previousTimestamp = CACurrentMediaTime()
         displayLinkUpdate = { [weak self] in
             if let strongSelf = self {
                 let currentTimestamp = CACurrentMediaTime()
-                strongSelf.delta = currentTimestamp - previousTimestamp
+                let delta: Double
+                if let previousTimestamp = strongSelf.previousTimestamp {
+                    delta = currentTimestamp - previousTimestamp
+                } else {
+                    delta = 1.0 / 60.0
+                }
+                strongSelf.delta = delta
                 strongSelf.updateAnimation()
-                previousTimestamp = currentTimestamp
+                strongSelf.previousTimestamp = currentTimestamp
             }
         }
     }
@@ -216,6 +221,7 @@ open class ManagedAnimationNode: ASDisplayNode {
         }
         
         self.didTryAdvancingState = false
+        self.previousTimestamp = CACurrentMediaTime()
         self.displayLink.isPaused = false
     }