Various improvements

submodules/TelegramUI/Components/EmojiTextAttachmentView/Sources/EmojiTextAttachmentView.swift

@@ -482,3 +482,69 @@ public final class EmojiTextAttachmentView: UIView {
         self.contentLayer.frame = CGRect(origin: CGPoint(x: 0.0, y: 0.0), size: CGSize(width: self.bounds.width, height: self.bounds.height))
     }
 }
+
+public final class CustomEmojiContainerView: UIView {
+    private let emojiViewProvider: (ChatTextInputTextCustomEmojiAttribute) -> UIView?
+    
+    private var emojiLayers: [InlineStickerItemLayer.Key: UIView] = [:]
+    
+    public init(emojiViewProvider: @escaping (ChatTextInputTextCustomEmojiAttribute) -> UIView?) {
+        self.emojiViewProvider = emojiViewProvider
+        
+        super.init(frame: CGRect())
+    }
+    
+    required init(coder: NSCoder) {
+        preconditionFailure()
+    }
+    
+    public func update(fontSize: CGFloat, textColor: UIColor, 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
+            }
+            
+            if let view = view as? EmojiTextAttachmentView {
+                view.updateTextColor(textColor)
+            }
+            
+            let itemSize: CGFloat = floor(24.0 * fontSize / 17.0)
+            let size = CGSize(width: itemSize, height: itemSize)
+            
+            view.frame = CGRect(origin: CGPoint(x: floor(rect.midX - size.width / 2.0), y: floor(rect.midY - size.height / 2.0) + 1.0), 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)
+        }
+    }
+}