Refactor ProgressNavigationButtonNode

submodules/ProgressNavigationButtonNode/Sources/ProgressNavigationButtonNode.swift

@@ -0,0 +1,35 @@
+import Foundation
+import UIKit
+import AsyncDisplayKit
+import Display
+import TelegramPresentationData
+import ActivityIndicator
+
+public final class ProgressNavigationButtonNode: ASDisplayNode {
+    private var indicatorNode: ActivityIndicator
+    
+    convenience public init(theme: PresentationTheme) {
+        self.init(color: theme.rootController.navigationBar.accentTextColor)
+    }
+    
+    public init(color: UIColor) {
+        self.indicatorNode = ActivityIndicator(type: .custom(color, 22.0, 1.0, false))
+        
+        super.init()
+        
+        self.addSubnode(self.indicatorNode)
+    }
+    
+    override public func calculateSizeThatFits(_ constrainedSize: CGSize) -> CGSize {
+        return CGSize(width: 26.0, height: 22.0)
+    }
+    
+    override public func layout() {
+        super.layout()
+        
+        let size = self.bounds.size
+        
+        let indicatorSize = CGSize(width: 22.0, height: 22.0)
+        self.indicatorNode.frame = CGRect(origin: CGPoint(x: floor((size.width - indicatorSize.width) / 2.0), y: floor((size.height - indicatorSize.height) / 2.0)), size: indicatorSize)
+    }
+}