Various fixes

submodules/TelegramUI/Components/Stars/StarsPurchaseScreen/Sources/ItemLoadingComponent.swift

@@ -0,0 +1,92 @@
+import Foundation
+import UIKit
+import Display
+import AppBundle
+import HierarchyTrackingLayer
+import ComponentFlow
+import TextLoadingEffect
+
+final class ItemLoadingComponent: Component {
+    private let color: UIColor
+    
+    public init(color: UIColor) {
+        self.color = color
+    }
+
+    public static func ==(lhs: ItemLoadingComponent, rhs: ItemLoadingComponent) -> Bool {
+        if !lhs.color.isEqual(rhs.color) {
+            return false
+        }
+        return true
+    }
+    
+    public final class View: UIView {
+        private let loadingView = TextLoadingEffectView()
+        private let borderView = UIImageView()
+        
+        private let borderMaskView = UIView()
+        private let borderMaskGradientView = UIImageView()
+        private let borderMaskFillView = UIImageView()
+        
+        private var component: ItemLoadingComponent?
+        
+        override public init(frame: CGRect) {
+            super.init(frame: frame)
+            
+            self.addSubview(self.loadingView)
+            self.addSubview(self.borderView)
+            
+            self.borderView.image = generateFilledRoundedRectImage(size: CGSize(width: 24.0, height: 24.0), cornerRadius: 10.0, color: nil, strokeColor: .white, strokeWidth: 1.0 + UIScreenPixel, backgroundColor: nil)?.stretchableImage(withLeftCapWidth: 10, topCapHeight: 10).withRenderingMode(.alwaysTemplate)
+            
+            self.borderMaskView.backgroundColor = .clear
+            self.borderMaskFillView.backgroundColor = .white
+            
+            self.borderMaskView.addSubview(self.borderMaskFillView)
+            self.borderMaskFillView.addSubview(self.borderMaskGradientView)
+        }
+        
+        required public init?(coder: NSCoder) {
+            fatalError("init(coder:) has not been implemented")
+        }
+        
+        func playAppearanceAnimation() {
+            self.borderView.mask = self.borderMaskView
+            
+            let gradientWidth = self.borderView.bounds.width * 0.4
+            self.borderMaskGradientView.image = generateGradientImage(size: CGSize(width: gradientWidth, height: 24.0), colors: [UIColor.white, UIColor.white.withAlphaComponent(0.0)], locations: [0.0, 1.0], direction: .horizontal)
+            
+            self.borderMaskGradientView.frame = CGRect(origin: CGPoint(x: self.borderView.bounds.width, y: 0.0), size: CGSize(width: gradientWidth, height: self.borderView.bounds.height))
+            self.borderMaskFillView.frame = CGRect(origin: .zero, size: self.borderView.bounds.size)
+            
+            self.borderMaskFillView.layer.animatePosition(from: CGPoint(x: -self.borderView.bounds.width, y: 0.0), to: .zero, duration: 1.0, removeOnCompletion: false, additive: true, completion: { _ in
+                self.borderView.mask = nil
+            })
+        }
+        
+        func update(component: ItemLoadingComponent, availableSize: CGSize, state: EmptyComponentState, environment: Environment<Empty>, transition: Transition) -> CGSize {
+            let isFirstTime = self.component == nil
+            
+            self.component = component
+            
+            self.borderView.tintColor = component.color
+            
+            self.loadingView.update(color: component.color, rect: CGRect(origin: .zero, size: availableSize))
+            transition.setFrame(view: self.borderView, frame: CGRect(origin: .zero, size: availableSize))
+            self.borderMaskView.frame = self.borderView.bounds
+            
+            if isFirstTime {
+                self.playAppearanceAnimation()
+            }
+            
+            return availableSize
+        }
+    }
+    
+    public func makeView() -> View {
+        return View(frame: CGRect())
+    }
+    
+    public func update(view: View, availableSize: CGSize, state: EmptyComponentState, environment: Environment<Empty>, transition: Transition) -> CGSize {
+        return view.update(component: self, availableSize: availableSize, state: state, environment: environment, transition: transition)
+    }
+}