Reaction experiments

submodules/ContextUI/Sources/ReactionPreviewView.swift

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+import Foundation
+import UIKit
+import SwiftSignalKit
+import Display
+import ComponentFlow
+import TelegramCore
+import AccountContext
+import EmojiStatusComponent
+
+final class ReactionPreviewView: UIView {
+    private let context: AccountContext
+    private let file: TelegramMediaFile
+    
+    private let icon = ComponentView<Empty>()
+
+    init(context: AccountContext, file: TelegramMediaFile) {
+        self.context = context
+        self.file = file
+        
+        super.init(frame: CGRect())
+    }
+
+    required init(coder: NSCoder) {
+        preconditionFailure()
+    }
+
+    func update(size: CGSize) {
+        let iconSize = self.icon.update(
+            transition: .immediate,
+            component: AnyComponent(EmojiStatusComponent(
+                context: self.context,
+                animationCache: self.context.animationCache,
+                animationRenderer: self.context.animationRenderer,
+                content: .animation(
+                    content: .file(file: self.file),
+                    size: size,
+                    placeholderColor: .clear,
+                    themeColor: .white,
+                    loopMode: .count(0)
+                ),
+                isVisibleForAnimations: true,
+                action: nil
+            )),
+            environment: {},
+            containerSize: size
+        )
+        let iconFrame = CGRect(origin: CGPoint(x: floor((size.width - iconSize.width) * 0.5), y: floor((size.height - iconSize.height) * 0.5)), size: iconSize)
+        if let iconView = self.icon.view {
+            if iconView.superview == nil {
+                self.addSubview(iconView)
+            }
+            iconView.frame = iconFrame
+        }
+    }
+}