Merge commit '7621e2f8dec938cf48181c8b10afc9b01f444e68' into beta

submodules/ItemListUI/Sources/ItemListLoadingIndicatorEmptyStateItem.swift

@@ -0,0 +1,57 @@
+import Foundation
+import UIKit
+import AsyncDisplayKit
+import Display
+import TelegramPresentationData
+import ActivityIndicator
+
+public final class ItemListLoadingIndicatorEmptyStateItem: ItemListControllerEmptyStateItem {
+    let theme: PresentationTheme
+    
+    public init(theme: PresentationTheme) {
+        self.theme = theme
+    }
+    
+    public func isEqual(to: ItemListControllerEmptyStateItem) -> Bool {
+        return to is ItemListLoadingIndicatorEmptyStateItem
+    }
+    
+    public func node(current: ItemListControllerEmptyStateItemNode?) -> ItemListControllerEmptyStateItemNode {
+        if let current = current as? ItemListLoadingIndicatorEmptyStateItemNode {
+            current.theme = self.theme
+            return current
+        } else {
+            return ItemListLoadingIndicatorEmptyStateItemNode(theme: self.theme)
+        }
+    }
+}
+
+public final class ItemListLoadingIndicatorEmptyStateItemNode: ItemListControllerEmptyStateItemNode {
+    public var theme: PresentationTheme {
+        didSet {
+            self.indicator.type = .custom(self.theme.list.itemAccentColor, 40.0, 2.0, false)
+        }
+    }
+    private let indicator: ActivityIndicator
+    
+    private var validLayout: (ContainerViewLayout, CGFloat)?
+    
+    public init(theme: PresentationTheme) {
+        self.theme = theme
+        self.indicator = ActivityIndicator(type: .custom(theme.list.itemAccentColor, 22.0, 2.0, false))
+        
+        super.init()
+        
+        self.addSubnode(self.indicator)
+    }
+    
+    override public func updateLayout(layout: ContainerViewLayout, navigationBarHeight: CGFloat, transition: ContainedViewLayoutTransition) {
+        self.validLayout = (layout, navigationBarHeight)
+        
+        var insets = layout.insets(options: [.statusBar])
+        insets.top += navigationBarHeight
+        
+        let size = CGSize(width: 22.0, height: 22.0)
+        transition.updateFrame(node: self.indicator, frame: CGRect(origin: CGPoint(x: floor((layout.size.width - size.width) / 2.0), y: insets.top + floor((layout.size.height - insets.top - insets.bottom - size.height) / 2.0)), size: size))
+    }
+}