From 742ab4c0424f5c6dfc2a4da591db209cec0b05e2 Mon Sep 17 00:00:00 2001
From: Ali <>
Date: Fri, 24 Mar 2023 01:22:13 +0400
Subject: [PATCH] Fix chat background transition

---
 submodules/Display/Source/ListView.swift          |  4 ++++
 .../TelegramUI/Sources/ChatControllerNode.swift   | 13 ++++++++++++-
 .../TelegramUI/Sources/ChatHistoryListNode.swift  | 15 ++++++++++-----
 3 files changed, 26 insertions(+), 6 deletions(-)

diff --git a/submodules/Display/Source/ListView.swift b/submodules/Display/Source/ListView.swift
index 0832ceeb75..ccc2979e2e 100644
--- a/submodules/Display/Source/ListView.swift
+++ b/submodules/Display/Source/ListView.swift
@@ -195,6 +195,7 @@ open class ListView: ASDisplayNode, UIScrollViewAccessibilityDelegate, UIGesture
     private final var lastContentOffset: CGPoint = CGPoint()
     private final var lastContentOffsetTimestamp: CFAbsoluteTime = 0.0
     private final var ignoreScrollingEvents: Bool = false
+    public final var globalIgnoreScrollingEvents: Bool = false
 
     private let infiniteScrollSize: CGFloat
     
@@ -939,6 +940,9 @@ open class ListView: ASDisplayNode, UIScrollViewAccessibilityDelegate, UIGesture
         if self.ignoreScrollingEvents || scroller !== self.scroller {
             return
         }
+        if self.globalIgnoreScrollingEvents {
+            return
+        }
 
         /*let timestamp = CACurrentMediaTime()
         if !self.previousDidScrollTimestamp.isZero {
diff --git a/submodules/TelegramUI/Sources/ChatControllerNode.swift b/submodules/TelegramUI/Sources/ChatControllerNode.swift
index 0ef6fe43cb..b5e9f99835 100644
--- a/submodules/TelegramUI/Sources/ChatControllerNode.swift
+++ b/submodules/TelegramUI/Sources/ChatControllerNode.swift
@@ -3443,6 +3443,7 @@ class ChatControllerNode: ASDisplayNode, UIScrollViewDelegate {
     }
 
     final class SnapshotState {
+        let backgroundNode: WallpaperBackgroundNode
         fileprivate let historySnapshotState: ChatHistoryListNode.SnapshotState
         let titleViewSnapshotState: ChatTitleView.SnapshotState?
         let avatarSnapshotState: ChatAvatarNavigationNode.SnapshotState?
@@ -3453,6 +3454,7 @@ class ChatControllerNode: ASDisplayNode, UIScrollViewDelegate {
         let inputPanelOverscrollNodeSnapshot: UIView?
 
         fileprivate init(
+            backgroundNode: WallpaperBackgroundNode,
             historySnapshotState: ChatHistoryListNode.SnapshotState,
             titleViewSnapshotState: ChatTitleView.SnapshotState?,
             avatarSnapshotState: ChatAvatarNavigationNode.SnapshotState?,
@@ -3462,6 +3464,7 @@ class ChatControllerNode: ASDisplayNode, UIScrollViewDelegate {
             inputPanelNodeSnapshot: UIView?,
             inputPanelOverscrollNodeSnapshot: UIView?
         ) {
+            self.backgroundNode = backgroundNode
             self.historySnapshotState = historySnapshotState
             self.titleViewSnapshotState = titleViewSnapshotState
             self.avatarSnapshotState = avatarSnapshotState
@@ -3493,6 +3496,7 @@ class ChatControllerNode: ASDisplayNode, UIScrollViewDelegate {
             inputPanelOverscrollNodeSnapshot = snapshot
         }
         return SnapshotState(
+            backgroundNode: self.backgroundNode,
             historySnapshotState: self.historyNode.prepareSnapshotState(),
             titleViewSnapshotState: titleViewSnapshotState,
             avatarSnapshotState: avatarSnapshotState,
@@ -3505,7 +3509,14 @@ class ChatControllerNode: ASDisplayNode, UIScrollViewDelegate {
     }
 
     func animateFromSnapshot(_ snapshotState: SnapshotState, completion: @escaping () -> Void) {
-        self.historyNode.animateFromSnapshot(snapshotState.historySnapshotState, completion: completion)
+        let previousBackgroundNode = snapshotState.backgroundNode
+        self.backgroundNode.supernode?.insertSubnode(previousBackgroundNode, belowSubnode: self.backgroundNode)
+        
+        self.historyNode.animateFromSnapshot(snapshotState.historySnapshotState, completion: { [weak previousBackgroundNode] in
+            previousBackgroundNode?.removeFromSupernode()
+            
+            completion()
+        })
         self.navigateButtons.animateFromSnapshot(snapshotState.navigationButtonsSnapshotState)
 
         if let titleAccessoryPanelSnapshot = snapshotState.titleAccessoryPanelSnapshot {
diff --git a/submodules/TelegramUI/Sources/ChatHistoryListNode.swift b/submodules/TelegramUI/Sources/ChatHistoryListNode.swift
index aedf32089e..d44e2ac7fd 100644
--- a/submodules/TelegramUI/Sources/ChatHistoryListNode.swift
+++ b/submodules/TelegramUI/Sources/ChatHistoryListNode.swift
@@ -3789,15 +3789,16 @@ public final class ChatHistoryListNode: ListView, ChatHistoryNode {
             }
         }
 
-        let snapshotView = self.view.snapshotView(afterScreenUpdates: false)!
+        let snapshotView = self.view//.snapshotView(afterScreenUpdates: false)!
+        self.globalIgnoreScrollingEvents = true
 
-        snapshotView.frame = self.view.bounds
-        if let sublayers = self.layer.sublayers {
+        //snapshotView.frame = self.view.bounds
+        /*if let sublayers = self.layer.sublayers {
             for sublayer in sublayers {
                 sublayer.isHidden = true
             }
-        }
-        self.view.addSubview(snapshotView)
+        }*/
+        //self.view.addSubview(snapshotView)
 
         let overscrollView = self.overscrollView
         if let overscrollView = overscrollView {
@@ -3835,6 +3836,10 @@ public final class ChatHistoryListNode: ListView, ChatHistoryNode {
         snapshotParentView.frame = self.view.frame
 
         snapshotState.snapshotView.frame = snapshotParentView.bounds
+        
+        snapshotState.snapshotView.clipsToBounds = true
+        snapshotState.snapshotView.layer.sublayerTransform = CATransform3DMakeRotation(CGFloat.pi, 0.0, 0.0, 1.0)
+        
         self.view.superview?.insertSubview(snapshotParentView, belowSubview: self.view)
 
         snapshotParentView.layer.animatePosition(from: CGPoint(x: 0.0, y: 0.0), to: CGPoint(x: 0.0, y: -self.view.bounds.height - snapshotState.snapshotBottomInset - snapshotTopInset), duration: 0.5, timingFunction: kCAMediaTimingFunctionSpring, removeOnCompletion: false, additive: true, completion: { [weak snapshotParentView] _ in