[WIP] Edit message preview

submodules/ChatSendMessageActionUI/Sources/MessageItemView.swift

@@ -18,6 +18,7 @@ import MultilineTextWithEntitiesComponent
 import ReactionButtonListComponent
 import MultilineTextComponent
 import ChatInputTextNode
+import EmojiTextAttachmentView
 
 private final class EffectIcon: Component {
     enum Content: Equatable {
@@ -134,6 +135,68 @@ private final class EffectIcon: Component {
     }
 }
 
+final class CustomEmojiContainerView: UIView {
+    private let emojiViewProvider: (ChatTextInputTextCustomEmojiAttribute) -> UIView?
+    
+    private var emojiLayers: [InlineStickerItemLayer.Key: UIView] = [:]
+    
+    init(emojiViewProvider: @escaping (ChatTextInputTextCustomEmojiAttribute) -> UIView?) {
+        self.emojiViewProvider = emojiViewProvider
+        
+        super.init(frame: CGRect())
+    }
+    
+    required init(coder: NSCoder) {
+        preconditionFailure()
+    }
+    
+    func update(emojiRects: [(CGRect, ChatTextInputTextCustomEmojiAttribute)]) {
+        var nextIndexById: [Int64: Int] = [:]
+        
+        var validKeys = Set<InlineStickerItemLayer.Key>()
+        for (rect, emoji) in emojiRects {
+            let index: Int
+            if let nextIndex = nextIndexById[emoji.fileId] {
+                index = nextIndex
+            } else {
+                index = 0
+            }
+            nextIndexById[emoji.fileId] = index + 1
+            
+            let key = InlineStickerItemLayer.Key(id: emoji.fileId, index: index)
+            
+            let view: UIView
+            if let current = self.emojiLayers[key] {
+                view = current
+            } else if let newView = self.emojiViewProvider(emoji) {
+                view = newView
+                self.addSubview(newView)
+                self.emojiLayers[key] = view
+            } else {
+                continue
+            }
+            
+            let size = CGSize(width: 24.0, height: 24.0)
+            
+            view.frame = CGRect(origin: CGPoint(x: floor(rect.midX - size.width / 2.0), y: floor(rect.midY - size.height / 2.0)), size: size)
+            
+            validKeys.insert(key)
+        }
+        
+        var removeKeys: [InlineStickerItemLayer.Key] = []
+        for (key, view) in self.emojiLayers {
+            if !validKeys.contains(key) {
+                removeKeys.append(key)
+                view.removeFromSuperview()
+            }
+        }
+        for key in removeKeys {
+            self.emojiLayers.removeValue(forKey: key)
+        }
+    }
+}
+
+
 final class MessageItemView: UIView {
     private let backgroundWallpaperNode: ChatMessageBubbleBackdrop
     private let backgroundNode: ChatMessageBackground