Merge commit '7621e2f8dec938cf48181c8b10afc9b01f444e68' into beta

submodules/GalleryUI/Sources/SecretMediaPreviewFooterContentNode.swift

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+import Foundation
+import UIKit
+import AsyncDisplayKit
+import Display
+import Postbox
+import TelegramCore
+import SwiftSignalKit
+
+private let textFont = Font.regular(16.0)
+
+final class SecretMediaPreviewFooterContentNode: GalleryFooterContentNode {
+    private var currentText: String?
+    private let textNode: ImmediateTextNode
+    
+    override init() {
+        self.textNode = ImmediateTextNode()
+        self.textNode.isUserInteractionEnabled = false
+        self.textNode.displaysAsynchronously = false
+        
+        super.init()
+        
+        self.addSubnode(self.textNode)
+    }
+    
+    func setText(_ text: String) {
+        if self.currentText != text {
+            self.currentText = text
+            
+            self.textNode.attributedText = NSAttributedString(string: text, font: textFont, textColor: .white)
+            
+            self.requestLayout?(.immediate)
+        }
+    }
+    
+    override func updateLayout(size: CGSize, metrics: LayoutMetrics, leftInset: CGFloat, rightInset: CGFloat, bottomInset: CGFloat, contentInset: CGFloat, transition: ContainedViewLayoutTransition) -> CGFloat {
+        let width = size.width
+        let panelHeight: CGFloat = 44.0 + bottomInset
+        
+        let sideInset: CGFloat = leftInset + 8.0
+        let textSize = self.textNode.updateLayout(CGSize(width: width - sideInset * 2.0, height: CGFloat.greatestFiniteMagnitude))
+        transition.updateFrame(node: self.textNode, frame: CGRect(origin: CGPoint(x: floor((width - textSize.width) / 2.0), y: floor((44.0 - textSize.height) / 2.0)), size: textSize))
+        
+        return panelHeight
+    }
+}
+