Effect improvements

submodules/TelegramUI/Components/EntityKeyboard/Sources/WarpView.swift

@@ -0,0 +1,138 @@
+import Foundation
+import UIKit
+import Display
+import ComponentFlow
+import TelegramPresentationData
+
+final class WarpView: UIView {
+    private final class WarpPartView: UIView {
+        let cloneView: PortalView
+        
+        init?(contentView: PortalSourceView) {
+            guard let cloneView = PortalView(matchPosition: false) else {
+                return nil
+            }
+            self.cloneView = cloneView
+            
+            super.init(frame: CGRect())
+            
+            self.layer.anchorPoint = CGPoint(x: 0.5, y: 0.0)
+            
+            self.clipsToBounds = true
+            self.addSubview(cloneView.view)
+            contentView.addPortal(view: cloneView)
+        }
+        
+        required init?(coder: NSCoder) {
+            fatalError("init(coder:) has not been implemented")
+        }
+        
+        func update(containerSize: CGSize, rect: CGRect, transition: Transition) {
+            transition.setFrame(view: self.cloneView.view, frame: CGRect(origin: CGPoint(x: -rect.minX, y: -rect.minY), size: CGSize(width: containerSize.width, height: containerSize.height)))
+        }
+    }
+    
+    let contentView: PortalSourceView
+    
+    private let clippingView: UIView
+    
+    private var warpViews: [WarpPartView] = []
+    private let warpMaskContainer: UIView
+    private let warpMaskGradientLayer: SimpleGradientLayer
+    
+    override init(frame: CGRect) {
+        self.contentView = PortalSourceView()
+        self.clippingView = UIView()
+        
+        self.warpMaskContainer = UIView()
+        self.warpMaskGradientLayer = SimpleGradientLayer()
+        self.warpMaskContainer.layer.mask = self.warpMaskGradientLayer
+        
+        super.init(frame: frame)
+        
+        self.clippingView.addSubview(self.contentView)
+        
+        self.clippingView.clipsToBounds = true
+        self.addSubview(self.clippingView)
+        self.addSubview(self.warpMaskContainer)
+        
+        for _ in 0 ..< 8 {
+            if let warpView = WarpPartView(contentView: self.contentView) {
+                self.warpViews.append(warpView)
+                self.warpMaskContainer.addSubview(warpView)
+            }
+        }
+    }
+    
+    required init?(coder: NSCoder) {
+        fatalError("init(coder:) has not been implemented")
+    }
+    
+    func update(size: CGSize, topInset: CGFloat, warpHeight: CGFloat, theme: PresentationTheme, transition: Transition) {
+        transition.setFrame(view: self.contentView, frame: CGRect(origin: CGPoint(), size: size))
+        
+        let allItemsHeight = warpHeight * 0.5
+        for i in 0 ..< self.warpViews.count {
+            let itemHeight = warpHeight / CGFloat(self.warpViews.count)
+            let itemFraction = CGFloat(i + 1) / CGFloat(self.warpViews.count)
+            let _ = itemHeight
+            
+            let da = CGFloat.pi * 0.5 / CGFloat(self.warpViews.count)
+            let alpha = CGFloat.pi * 0.5 - itemFraction * CGFloat.pi * 0.5
+            let endPoint = CGPoint(x: cos(alpha), y: sin(alpha))
+            let prevAngle = alpha + da
+            let prevPt = CGPoint(x: cos(prevAngle), y: sin(prevAngle))
+            var angle: CGFloat
+            angle = -atan2(endPoint.y - prevPt.y, endPoint.x - prevPt.x)
+            
+            let itemLengthVector = CGPoint(x: endPoint.x - prevPt.x, y: endPoint.y - prevPt.y)
+            let itemLength = sqrt(itemLengthVector.x * itemLengthVector.x + itemLengthVector.y * itemLengthVector.y) * warpHeight * 0.5
+            let _ = itemLength
+            
+            var transform: CATransform3D
+            transform = CATransform3DIdentity
+            transform.m34 = 1.0 / 240.0
+            
+            transform = CATransform3DTranslate(transform, 0.0, prevPt.x * allItemsHeight, (1.0 - prevPt.y) * allItemsHeight)
+            transform = CATransform3DRotate(transform, angle, 1.0, 0.0, 0.0)
+            
+            let positionY = size.height - allItemsHeight + 4.0 + CGFloat(i) * itemLength
+            let rect = CGRect(origin: CGPoint(x: 0.0, y: positionY), size: CGSize(width: size.width, height: itemLength))
+            transition.setPosition(view: self.warpViews[i], position: CGPoint(x: rect.midX, y: 4.0))
+            transition.setBounds(view: self.warpViews[i], bounds: CGRect(origin: CGPoint(), size: CGSize(width: size.width, height: itemLength)))
+            transition.setTransform(view: self.warpViews[i], transform: transform)
+            self.warpViews[i].update(containerSize: size, rect: rect, transition: transition)
+        }
+        
+        let clippingTopInset: CGFloat = topInset
+        let frame = CGRect(origin: CGPoint(x: 0.0, y: clippingTopInset), size: CGSize(width: size.width, height: -clippingTopInset + size.height - 21.0))
+        transition.setPosition(view: self.clippingView, position: frame.center)
+        transition.setBounds(view: self.clippingView, bounds: CGRect(origin: CGPoint(x: 0.0, y: clippingTopInset), size: frame.size))
+        self.clippingView.clipsToBounds = true
+        
+        transition.setFrame(view: self.warpMaskContainer, frame: CGRect(origin: CGPoint(x: 0.0, y: size.height - allItemsHeight), size: CGSize(width: size.width, height: allItemsHeight)))
+        
+        var locations: [NSNumber] = []
+        var colors: [CGColor] = []
+        let numStops = 6
+        for i in 0 ..< numStops {
+            let step = CGFloat(i) / CGFloat(numStops - 1)
+            locations.append(step as NSNumber)
+            colors.append(UIColor.black.withAlphaComponent(1.0 - step * step).cgColor)
+        }
+        
+        let gradientHeight: CGFloat = 6.0
+        self.warpMaskGradientLayer.startPoint = CGPoint(x: 0.0, y: (allItemsHeight - gradientHeight) / allItemsHeight)
+        self.warpMaskGradientLayer.endPoint = CGPoint(x: 0.0, y: 1.0)
+        
+        self.warpMaskGradientLayer.locations = locations
+        self.warpMaskGradientLayer.colors = colors
+        self.warpMaskGradientLayer.type = .axial
+        
+        transition.setFrame(layer: self.warpMaskGradientLayer, frame: CGRect(origin: CGPoint(x: 0.0, y: 0.0), size: CGSize(width: size.width, height: allItemsHeight)))
+    }
+    
+    override func hitTest(_ point: CGPoint, with event: UIEvent?) -> UIView? {
+        return self.contentView.hitTest(point, with: event)
+    }
+}