Fix scrolling

submodules/Display/Source/ListView.swift

@@ -2932,7 +2932,7 @@ open class ListView: ASDisplayNode, UIScrollViewAccessibilityDelegate, UIGesture
                 if let index = itemNode.index, index == scrollToItem.index {
                     let insets = self.insets// updateSizeAndInsets?.insets ?? self.insets
                     
-                    let offset: CGFloat
+                    var offset: CGFloat
                     switch scrollToItem.position {
                         case let .bottom(additionalOffset):
                             offset = (self.visibleSize.height - insets.bottom) - itemNode.apparentFrame.maxY + itemNode.scrollPositioningInsets.bottom + additionalOffset
@@ -2948,6 +2948,13 @@ open class ListView: ASDisplayNode, UIScrollViewAccessibilityDelegate, UIGesture
                                     offset = insets.top - itemNode.apparentFrame.minY
                                 case .bottom:
                                     offset = (self.visibleSize.height - insets.bottom) - itemNode.apparentFrame.maxY
+                                case let .custom(getOverflow):
+                                    let overflow = getOverflow(itemNode)
+                                    offset = (self.visibleSize.height - insets.bottom) - itemNode.apparentFrame.maxY
+                                    offset += floor(overflow - (self.visibleSize.height - insets.bottom - insets.top) * 0.5)
+                                    //offset += 100.0
+                                    
+                                    //offset = (self.visibleSize.height - insets.bottom) - itemNode.apparentFrame.maxY + getOverflow(itemNode)
                                 }
                             }
                         case .visible:

submodules/Display/Source/ListViewIntermediateState.swift

@@ -2,9 +2,33 @@ import Foundation
 import UIKit
 import SwiftSignalKit
 
-public enum ListViewCenterScrollPositionOverflow {
+public enum ListViewCenterScrollPositionOverflow: Equatable {
     case top
     case bottom
+    case custom((ListViewItemNode) -> CGFloat)
+    
+    public static func ==(lhs: ListViewCenterScrollPositionOverflow, rhs: ListViewCenterScrollPositionOverflow) -> Bool {
+        switch lhs {
+        case .top:
+            if case .top = rhs {
+                return true
+            } else {
+                return false
+            }
+        case .bottom:
+            if case .bottom = rhs {
+                return true
+            } else {
+                return false
+            }
+        case .custom:
+            if case .custom = rhs {
+                return true
+            } else {
+                return false
+            }
+        }
+    }
 }
 
 public enum ListViewScrollPosition: Equatable {
@@ -303,7 +327,7 @@ struct ListViewState {
                                 switch overflow {
                                 case .top:
                                     offset = self.insets.top - node.frame.minY
-                                    case .bottom:
+                                case .bottom, .custom:
                                     offset = (self.visibleSize.height - self.insets.bottom) - node.frame.maxY
                                 }
                             }

submodules/TelegramUI/Components/Chat/ChatMessageBubbleItemNode/Sources/ChatMessageBubbleItemNode.swift

@@ -4955,6 +4955,17 @@ public class ChatMessageBubbleItemNode: ChatMessageItemView, ChatMessagePreviewI
         return nil
     }
     
+    public func getQuoteRect(quote: String) -> CGRect? {
+        for contentNode in self.contentNodes {
+            if let contentNode = contentNode as? ChatMessageTextBubbleContentNode {
+                if let result = contentNode.getQuoteRect(quote: quote) {
+                    return contentNode.view.convert(result, to: self.view)
+                }
+            }
+        }
+        return nil
+    }
+    
     public func hasExpandedAudioTranscription() -> Bool {
         for contentNode in self.contentNodes {
             if let contentNode = contentNode as? ChatMessageFileBubbleContentNode {

submodules/TelegramUI/Components/Chat/ChatMessageTextBubbleContentNode/Sources/ChatMessageTextBubbleContentNode.swift

@@ -978,6 +978,33 @@ public class ChatMessageTextBubbleContentNode: ChatMessageBubbleContentNode {
         return nil
     }
     
+    public func getQuoteRect(quote: String) -> CGRect? {
+        var rectsSet: [CGRect] = []
+        if !quote.isEmpty, let cachedLayout = self.textNode.textNode.cachedLayout, let string = cachedLayout.attributedString?.string {
+            let nsString = string as NSString
+            let range = nsString.range(of: quote)
+            if range.location != NSNotFound {
+                if let rects = cachedLayout.rangeRects(in: range)?.rects, !rects.isEmpty {
+                    rectsSet = rects
+                }
+            }
+        }
+        if !rectsSet.isEmpty {
+            var currentRect = CGRect()
+            for rect in rectsSet {
+                if currentRect.isEmpty {
+                    currentRect = rect
+                } else {
+                    currentRect = currentRect.union(rect)
+                }
+            }
+            
+            return currentRect.offsetBy(dx: self.textNode.textNode.frame.minX, dy: self.textNode.textNode.frame.minY)
+        }
+        
+        return nil
+    }
+    
     public func updateQuoteTextHighlightState(text: String?, color: UIColor, animated: Bool) {
         var rectsSet: [CGRect] = []
         if let text = text, !text.isEmpty, let cachedLayout = self.textNode.textNode.cachedLayout, let string = cachedLayout.attributedString?.string {

submodules/TelegramUI/Components/Chat/MessageInlineBlockBackgroundView/Sources/MessageInlineBlockBackgroundView.swift

@@ -32,7 +32,6 @@ private func generateTemplateImage(isMonochrome: Bool) -> UIImage {
     return generateImage(CGSize(width: radius * 2.0 + 4.0, height: radius * 2.0 + 8.0), rotatedContext: { size, context in
         context.clear(CGRect(origin: CGPoint(), size: size))
         
-        //context.addPath(UIBezierPath(roundedRect: CGRect(origin: CGPoint(), size: size), cornerRadius: radius).cgPath)
         addRoundedRectPath(context: context, rect: CGRect(origin: CGPoint(), size: size), radius: radius)
         context.clip()
         
@@ -408,7 +407,7 @@ public final class MessageInlineBlockBackgroundView: UIView {
                 patternContentLayer.frame = CGRect(origin: CGPoint(x: size.width - placement.position.x / 3.0 - itemSize.width * 0.5, y: placement.position.y / 3.0 - itemSize.height * 0.5), size: itemSize)
                 var alphaFraction = abs(placement.position.x) / 400.0
                 alphaFraction = min(1.0, max(0.0, alphaFraction))
-                patternContentLayer.opacity = 0.5 * Float(1.0 - alphaFraction)
+                patternContentLayer.opacity = 0.3 * Float(1.0 - alphaFraction)
                 
                 maxIndex += 1
             }

submodules/TelegramUI/Sources/PreparedChatHistoryViewTransition.swift

@@ -7,6 +7,7 @@ import MergeLists
 import AccountContext
 import ChatControllerInteraction
 import ChatHistoryEntry
+import ChatMessageBubbleItemNode
 
 func preparedChatHistoryViewTransition(from fromView: ChatHistoryView?, to toView: ChatHistoryView, reason: ChatHistoryViewTransitionReason, reverse: Bool, chatLocation: ChatLocation, controllerInteraction: ChatControllerInteraction, scrollPosition: ChatHistoryViewScrollPosition?, scrollAnimationCurve: ListViewAnimationCurve?, initialData: InitialMessageHistoryData?, keyboardButtonsMessage: Message?, cachedData: CachedPeerData?, cachedDataMessages: [MessageId: Message]?, readStateData: [PeerId: ChatHistoryCombinedInitialReadStateData]?, flashIndicators: Bool, updatedMessageSelection: Bool, messageTransitionNode: ChatMessageTransitionNodeImpl?, allUpdated: Bool) -> ChatHistoryViewTransition {
     var mergeResult: (deleteIndices: [Int], indicesAndItems: [(Int, ChatHistoryEntry, Int?)], updateIndices: [(Int, ChatHistoryEntry, Int)])
@@ -195,8 +196,19 @@ func preparedChatHistoryViewTransition(from fromView: ChatHistoryView?, to toVie
                 }
             case let .index(scrollSubject, position, directionHint, animated, highlight, displayLink):
                 let scrollIndex = scrollSubject
+                var position = position
                 if case .center = position, highlight {
                     scrolledToIndex = scrollSubject
+                    if let quote = scrollSubject.quote {
+                        position = .center(.custom({ itemNode in
+                            if let itemNode = itemNode as? ChatMessageBubbleItemNode {
+                                if let quoteRect = itemNode.getQuoteRect(quote: quote) {
+                                    return quoteRect.midY
+                                }
+                            }
+                            return 0.0
+                        }))
+                    }
                 }
                 var index = toView.filteredEntries.count - 1
                 for entry in toView.filteredEntries {