Тапбар — dual-layer маскировка, плавные анимации и badge

Rosetta/DesignSystem/Components/RosettaTab.swift

@@ -0,0 +1,46 @@
+import Foundation
+
+/// Tab model for the main tab bar — shared by MainTabView and RosettaTabBar.
+enum RosettaTab: String, CaseIterable, Sendable {
+    case chats, calls, settings
+
+    static let interactionOrder: [RosettaTab] = [.calls, .chats, .settings]
+
+    var label: String {
+        switch self {
+        case .chats: return "Chats"
+        case .calls: return "Calls"
+        case .settings: return "Settings"
+        }
+    }
+
+    var animationName: String {
+        switch self {
+        case .chats: return "TabChats"
+        case .calls: return "TabCalls"
+        case .settings: return "TabSettings"
+        }
+    }
+
+    var icon: String {
+        switch self {
+        case .chats: return "bubble.left.and.bubble.right"
+        case .calls: return "phone"
+        case .settings: return "gearshape"
+        }
+    }
+
+    var selectedIcon: String {
+        switch self {
+        case .chats: return "bubble.left.and.bubble.right.fill"
+        case .calls: return "phone.fill"
+        case .settings: return "gearshape.fill"
+        }
+    }
+
+    var interactionIndex: Int {
+        Self.interactionOrder.firstIndex(of: self) ?? 0
+    }
+}
+
+struct TabBadge { let tab: RosettaTab; let text: String }

Rosetta/DesignSystem/Components/RosettaTabBar.swift

@@ -2,55 +2,6 @@ import SwiftUI
 import UIKit
 import Lottie
 
-// MARK: - Tab
-
-enum RosettaTab: String, CaseIterable, Sendable {
-    case chats, calls, settings
-
-    static let interactionOrder: [RosettaTab] = [.calls, .chats, .settings]
-
-    var label: String {
-        switch self {
-        case .chats: return "Chats"
-        case .calls: return "Calls"
-        case .settings: return "Settings"
-        }
-    }
-
-    var animationName: String {
-        switch self {
-        case .chats: return "TabChats"
-        case .calls: return "TabCalls"
-        case .settings: return "TabSettings"
-        }
-    }
-
-    var icon: String {
-        switch self {
-        case .chats: return "bubble.left.and.bubble.right"
-        case .calls: return "phone"
-        case .settings: return "gearshape"
-        }
-    }
-
-    var selectedIcon: String {
-        switch self {
-        case .chats: return "bubble.left.and.bubble.right.fill"
-        case .calls: return "phone.fill"
-        case .settings: return "gearshape.fill"
-        }
-    }
-
-    var interactionIndex: Int {
-        Self.interactionOrder.firstIndex(of: self) ?? 0
-    }
-}
-
-struct TabBadge { let tab: RosettaTab; let text: String }
-struct TabBarSwipeState {
-    let fromTab: RosettaTab; let hoveredTab: RosettaTab; let fractionalIndex: CGFloat
-}
-
 // MARK: - Colors
 
 private enum TabBarUIColors {
@@ -58,7 +9,6 @@ private enum TabBarUIColors {
     static let selectedIcon = UIColor(RosettaColors.primaryBlue)
     static let text = UIColor { $0.userInterfaceStyle == .dark ? .white : UIColor(red: 0, green: 0, blue: 0, alpha: 0.8) }
     static let selectedText = UIColor(RosettaColors.primaryBlue)
-    // Badge always red/white — matches Telegram screenshots in both themes
     static let badgeBg = UIColor(red: 1, green: 0.23, blue: 0.19, alpha: 1)
     static let badgeText = UIColor.white
     static let selectionFill = UIColor.white.withAlphaComponent(0.07)
@@ -69,6 +19,12 @@ private enum TabBarUIColors {
 private final class TabSelectionGesture: UIGestureRecognizer {
     private(set) var initialLocation: CGPoint = .zero
 
+    override init(target: Any?, action: Selector?) {
+        super.init(target: target, action: action)
+        delaysTouchesBegan = false
+        delaysTouchesEnded = false
+    }
+
     override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent) {
         super.touchesBegan(touches, with: event)
         initialLocation = touches.first?.location(in: view) ?? .zero
@@ -96,9 +52,7 @@ final class RosettaTabBarUIView: UIView {
     private let innerInset: CGFloat = 4
     private let itemHeight: CGFloat = 56
     private let perItemWidth: CGFloat = 90
-    /// Telegram LiquidLens inset — visible gap between lens and capsule edge.
     private let lensInset: CGFloat = 4
-    /// Telegram: 1.15 scale when gesture active. Toned down for subtlety.
     private let liftedScale: CGFloat = 1.08
 
     private var barWidth: CGFloat { perItemWidth * CGFloat(tabs.count) + innerInset * 2 }
@@ -108,17 +62,23 @@ final class RosettaTabBarUIView: UIView {
     // MARK: State
 
     var selectedIndex: Int = 1 {
-        didSet { if oldValue != selectedIndex { updateSelection(animated: true) } }
+        didSet {
+            if oldValue != selectedIndex {
+                updateLensClip(animated: true)
+                updateLabelColors()
+            }
+        }
     }
     var onTabSelected: ((RosettaTab) -> Void)?
     var badgeText: String? { didSet { layoutBadge() } }
 
     private var isDragging = false
+    private var didDrag = false // true if .changed fired (not just a tap)
     private var dragLensX: CGFloat = 0
     private var dragStartLensX: CGFloat = 0
     private var hoveredIndex: Int = 1
 
-    // MARK: Subviews
+    // MARK: Subviews — base (unselected, always visible)
 
     private let glassBackground = TelegramGlassUIView(frame: .zero)
     private let selectionView: UIView = {
@@ -129,9 +89,28 @@ final class RosettaTabBarUIView: UIView {
     }()
     private var iconViews: [LottieAnimationView] = []
     private var labelViews: [UILabel] = []
+
+    // MARK: Subviews — selected overlay (clipped to lens, Telegram LiquidLens parity)
+
+    private let selectedClipView: UIView = {
+        let v = UIView()
+        v.clipsToBounds = true
+        v.isUserInteractionEnabled = false
+        return v
+    }()
+    private let selectedContentView: UIView = {
+        let v = UIView()
+        v.isUserInteractionEnabled = false
+        return v
+    }()
+    private var selectedIconViews: [LottieAnimationView] = []
+
     private var badgeBgView: UIView?
     private var badgeLabel: UILabel?
-    private var appliedColorHex: [Int: UInt64] = [:]
+
+    // Cached RGBA for label interpolation — avoids dynamic UIColor resolution per frame.
+    private var textRGBA: (CGFloat, CGFloat, CGFloat, CGFloat) = (1, 1, 1, 1)
+    private var selectedTextRGBA: (CGFloat, CGFloat, CGFloat, CGFloat) = (0, 0, 0, 1)
 
     // MARK: Init
 
@@ -141,97 +120,167 @@ final class RosettaTabBarUIView: UIView {
         addSubview(glassBackground)
         addSubview(selectionView)
 
-        for (i, tab) in tabs.enumerated() {
-            let lottie = LottieAnimationView()
-            lottie.contentMode = .scaleAspectFit
-            lottie.isUserInteractionEnabled = false
-            lottie.backgroundBehavior = .pauseAndRestore
-            if let anim = LottieAnimationCache.shared.animation(named: tab.animationName) {
-                lottie.animation = anim
-            } else {
-                lottie.animation = LottieAnimation.named(tab.animationName)
-            }
-            lottie.loopMode = .playOnce
-            lottie.currentProgress = 1.0
-            addSubview(lottie)
-            iconViews.append(lottie)
-
-            let label = UILabel()
-            label.text = tab.label
-            label.font = .systemFont(ofSize: 10, weight: .semibold)
-            label.textAlignment = .center
-            addSubview(label)
-            labelViews.append(label)
-            applyColor(to: i, selected: i == selectedIndex, animated: false)
+        for tab in tabs {
+            let icon = makeLottie(for: tab); addSubview(icon); iconViews.append(icon)
+            let label = makeLabel(for: tab); addSubview(label); labelViews.append(label)
         }
 
+        addSubview(selectedClipView)
+        selectedClipView.addSubview(selectedContentView)
+
+        for tab in tabs {
+            let icon = makeLottie(for: tab); selectedContentView.addSubview(icon); selectedIconViews.append(icon)
+        }
+
+        applyAllColors()
         let g = TabSelectionGesture(target: self, action: #selector(handleGesture(_:)))
         g.delegate = self
         addGestureRecognizer(g)
     }
 
     required init?(coder: NSCoder) { fatalError() }
-
     override var intrinsicContentSize: CGSize { CGSize(width: barWidth, height: barHeight) }
 
+    // MARK: Helpers
+
+    private func makeLottie(for tab: RosettaTab) -> LottieAnimationView {
+        let v = LottieAnimationView()
+        v.contentMode = .scaleAspectFit
+        v.isUserInteractionEnabled = false
+        v.backgroundBehavior = .pauseAndRestore
+        v.animation = LottieAnimationCache.shared.animation(named: tab.animationName)
+            ?? LottieAnimation.named(tab.animationName)
+        v.loopMode = .playOnce; v.currentProgress = 1.0
+        return v
+    }
+
+    private func makeLabel(for tab: RosettaTab) -> UILabel {
+        let l = UILabel(); l.text = tab.label
+        l.font = .systemFont(ofSize: 10, weight: .semibold); l.textAlignment = .center
+        return l
+    }
+
+    private func setLottieColor(_ view: LottieAnimationView, _ color: UIColor) {
+        var r: CGFloat = 0, g: CGFloat = 0, b: CGFloat = 0, a: CGFloat = 0
+        color.getRed(&r, green: &g, blue: &b, alpha: &a)
+        view.setValueProvider(
+            ColorValueProvider(LottieColor(r: Double(r), g: Double(g), b: Double(b), a: Double(a))),
+            keypath: AnimationKeypath(keypath: "**.Color")
+        )
+    }
+
+    private func applyAllColors() {
+        cacheColorComponents()
+        for i in 0..<tabs.count {
+            setLottieColor(iconViews[i], TabBarUIColors.icon)
+            setLottieColor(selectedIconViews[i], TabBarUIColors.selectedIcon)
+        }
+        updateLabelColors()
+    }
+
+    private func cacheColorComponents() {
+        var r: CGFloat = 0, g: CGFloat = 0, b: CGFloat = 0, a: CGFloat = 0
+        TabBarUIColors.text.getRed(&r, green: &g, blue: &b, alpha: &a)
+        textRGBA = (r, g, b, a)
+        TabBarUIColors.selectedText.getRed(&r, green: &g, blue: &b, alpha: &a)
+        selectedTextRGBA = (r, g, b, a)
+    }
+
+    private func updateLabelColors() {
+        let active = selectedIndex
+        for i in 0..<tabs.count {
+            labelViews[i].textColor = (i == active) ? TabBarUIColors.selectedText : TabBarUIColors.text
+        }
+    }
+
+    /// Smooth label color interpolation during drag — uses cached RGBA to avoid per-frame UIColor resolution.
+    private func updateLabelsForFraction(_ fraction: CGFloat) {
+        let clamped = max(0, min(fraction, CGFloat(tabs.count - 1)))
+        let lower = Int(clamped)
+        let upper = min(lower + 1, tabs.count - 1)
+        let t = clamped - CGFloat(lower)
+        let (r1, g1, b1, a1) = textRGBA
+        let (r2, g2, b2, a2) = selectedTextRGBA
+        for i in 0..<tabs.count {
+            let s: CGFloat
+            if lower == upper { s = (i == lower) ? 1.0 : 0.0 }
+            else if i == lower { s = 1.0 - t }
+            else if i == upper { s = t }
+            else { s = 0.0 }
+            labelViews[i].textColor = UIColor(
+                red: r1 + (r2 - r1) * s, green: g1 + (g2 - g1) * s,
+                blue: b1 + (b2 - b1) * s, alpha: a1 + (a2 - a1) * s
+            )
+        }
+    }
+
     // MARK: Layout
 
     override func layoutSubviews() {
         super.layoutSubviews()
-        let w = bounds.width; let h = bounds.height
+        let h = bounds.height
         glassBackground.frame = bounds
         glassBackground.updateGlass()
-        updateSelectionFrame(animated: false)
 
         let iw = itemW
         for i in 0..<tabs.count {
             let x = innerInset + CGFloat(i) * iw
             let iconSize: CGFloat = 44
-            let iconX = x + (iw - iconSize) / 2
-            let iconY = innerInset + 1
-            iconViews[i].frame = CGRect(x: iconX, y: iconY, width: iconSize, height: iconSize)
+            let iconFrame = CGRect(x: x + (iw - iconSize) / 2, y: innerInset + 1, width: iconSize, height: iconSize)
+            iconViews[i].frame = iconFrame
+            selectedIconViews[i].frame = iconFrame
 
-            let labelH: CGFloat = 14
-            let labelY = h - innerInset - labelH - 1
-            labelViews[i].frame = CGRect(x: x, y: labelY, width: iw, height: labelH)
+            let labelFrame = CGRect(x: x, y: h - innerInset - 17, width: iw, height: 14)
+            labelViews[i].frame = labelFrame
         }
+        // cornerRadius only changes on bounds change, not during drag.
+        let lensH = bounds.height - lensInset * 2
+        selectionView.layer.cornerRadius = lensH / 2
+        selectedClipView.layer.cornerRadius = lensH / 2
+
+        updateLensClip(animated: false)
         layoutBadge()
     }
 
-    // MARK: Selection Indicator
+    // MARK: Lens Clip (Telegram LiquidLens masking)
 
     private func lensFrame(for index: Int) -> CGRect {
-        let iw = itemW
         let lensH = bounds.height - lensInset * 2
-        let lensW = iw
-        let lensX = innerInset + CGFloat(index) * iw
-        return CGRect(x: lensX, y: lensInset, width: lensW, height: lensH)
+        return CGRect(x: innerInset + CGFloat(index) * itemW, y: lensInset, width: itemW, height: lensH)
     }
 
-    private func updateSelectionFrame(animated: Bool) {
+    private func updateLensClip(animated: Bool) {
         guard bounds.width > 0 else { return }
         let lensH = bounds.height - lensInset * 2
-        selectionView.layer.cornerRadius = lensH / 2
 
+        let target: CGRect
         if isDragging {
-            // Lens follows finger — clamped to capsule bounds
-            let lensW = itemW
-            let minX = lensInset
-            let maxX = bounds.width - lensW - lensInset
-            let clampedX = max(minX, min(dragLensX, maxX))
-            selectionView.frame = CGRect(x: clampedX, y: lensInset, width: lensW, height: lensH)
+            let clampedX = max(lensInset, min(dragLensX, bounds.width - itemW - lensInset))
+            target = CGRect(x: clampedX, y: lensInset, width: itemW, height: lensH)
         } else {
-            let target = lensFrame(for: selectedIndex)
-            if animated {
-                UIView.animate(withDuration: 0.4, delay: 0, usingSpringWithDamping: 0.78,
-                               initialSpringVelocity: 0, options: .beginFromCurrentState) {
+            target = lensFrame(for: selectedIndex)
+        }
+
+        let apply = {
             self.selectionView.frame = target
+            self.selectedClipView.frame = target
+            self.selectedContentView.frame = CGRect(
+                x: -target.origin.x, y: -target.origin.y,
+                width: self.bounds.width, height: self.bounds.height
+            )
+            if !self.isDragging {
                 self.selectionView.transform = .identity
             }
-            } else {
-                selectionView.frame = target
-                selectionView.transform = .identity
         }
+        if animated && !isDragging {
+            UIView.animate(withDuration: 0.3, delay: 0, usingSpringWithDamping: 0.82,
+                           initialSpringVelocity: 0, options: .beginFromCurrentState, animations: apply)
+        } else {
+            // Disable implicit CoreAnimation during drag — direct property set like Telegram's .immediate
+            CATransaction.begin()
+            CATransaction.setDisableActions(true)
+            apply()
+            CATransaction.commit()
         }
     }
 
@@ -242,90 +291,52 @@ final class RosettaTabBarUIView: UIView {
         switch g.state {
         case .began:
             isDragging = true
-            hoveredIndex = selectedIndex
-            // Start lens at selected tab position
+            didDrag = false
+            hoveredIndex = max(0, min(Int((g.initialLocation.x - innerInset) / iw), tabs.count - 1))
             dragStartLensX = innerInset + CGFloat(selectedIndex) * iw
             dragLensX = dragStartLensX
-
-            // Lifted state: scale up selection indicator (Telegram isLifted)
-            UIView.animate(withDuration: 0.3, delay: 0, usingSpringWithDamping: 0.7,
+            UIView.animate(withDuration: 0.2, delay: 0, usingSpringWithDamping: 0.8,
                            initialSpringVelocity: 0, options: .beginFromCurrentState) {
                 self.selectionView.transform = CGAffineTransform(scaleX: self.liftedScale, y: self.liftedScale)
             }
-            updateSelectionFrame(animated: false)
+            updateLensClip(animated: false)
 
         case .changed:
+            didDrag = true
             let loc = g.location(in: self)
-            let translation = loc.x - g.initialLocation.x
-            dragLensX = dragStartLensX + translation
-
-            // Update hovered tab
-            let newHover = max(0, min(Int((loc.x - innerInset) / iw), tabs.count - 1))
-            if newHover != hoveredIndex {
-                hoveredIndex = newHover
-                // Smooth color transition (Telegram: colors blend when hovering)
-                UIView.animate(withDuration: 0.2) {
-                    for i in 0..<self.tabs.count {
-                        self.applyColor(to: i, selected: i == self.hoveredIndex, animated: false)
-                    }
-                }
-            }
-            updateSelectionFrame(animated: false)
+            dragLensX = dragStartLensX + (loc.x - g.initialLocation.x)
+            hoveredIndex = max(0, min(Int((loc.x - innerInset) / iw), tabs.count - 1))
+            let fractionalIdx = max(0, min((dragLensX - innerInset) / iw, CGFloat(tabs.count - 1)))
+            updateLabelsForFraction(fractionalIdx)
+            updateLensClip(animated: false)
 
         case .ended:
             isDragging = false
-            let target = tabs[hoveredIndex]
-            if hoveredIndex != selectedIndex {
+            let targetChanged = hoveredIndex != selectedIndex
+            if targetChanged {
                 iconViews[hoveredIndex].play(fromProgress: 0, toProgress: 1, loopMode: .playOnce)
-                selectedIndex = hoveredIndex
-                onTabSelected?(target)
+                selectedIconViews[hoveredIndex].play(fromProgress: 0, toProgress: 1, loopMode: .playOnce)
+                selectedIndex = hoveredIndex // → didSet → updateLensClip(animated: true) + updateLabelColors()
+                // Defer SwiftUI state update to next frame — prevents layout pass
+                // from blocking the current frame and causing a freeze.
+                let tab = tabs[hoveredIndex]
+                DispatchQueue.main.async { [weak self] in
+                    self?.onTabSelected?(tab)
+                }
             } else {
-                // Spring back with un-lift
-                updateSelection(animated: true)
+                updateLensClip(animated: true)
+                updateLabelColors()
             }
 
         case .cancelled:
             isDragging = false
-            updateSelection(animated: true)
+            updateLensClip(animated: true)
+            updateLabelColors()
 
         default: break
         }
     }
 
-    // MARK: Selection Update
-
-    private func updateSelection(animated: Bool) {
-        for i in 0..<tabs.count {
-            applyColor(to: i, selected: i == selectedIndex, animated: animated)
-        }
-        updateSelectionFrame(animated: animated)
-    }
-
-    // MARK: Colors
-
-    private func applyColor(to index: Int, selected: Bool, animated: Bool) {
-        let iconColor = selected ? TabBarUIColors.selectedIcon : TabBarUIColors.icon
-        let txtColor = selected ? TabBarUIColors.selectedText : TabBarUIColors.text
-
-        let apply = {
-            self.labelViews[index].textColor = txtColor
-        }
-        if animated {
-            UIView.animate(withDuration: 0.25, animations: apply)
-        } else {
-            apply()
-        }
-
-        // Lottie color — cache hex to skip redundant setValueProvider
-        var r: CGFloat = 0, g: CGFloat = 0, b: CGFloat = 0, a: CGFloat = 0
-        iconColor.getRed(&r, green: &g, blue: &b, alpha: &a)
-        let hex = (UInt64(r * 255) << 24) | (UInt64(g * 255) << 16) | (UInt64(b * 255) << 8) | UInt64(a * 255)
-        guard appliedColorHex[index] != hex else { return }
-        appliedColorHex[index] = hex
-        let lc = LottieColor(r: Double(r), g: Double(g), b: Double(b), a: Double(a))
-        iconViews[index].setValueProvider(ColorValueProvider(lc), keypath: AnimationKeypath(keypath: "**.Color"))
-    }
-
     // MARK: Badge
 
     private func layoutBadge() {
@@ -333,12 +344,12 @@ final class RosettaTabBarUIView: UIView {
             badgeBgView?.isHidden = true; return
         }
         let chatsIdx = RosettaTab.chats.interactionIndex
-        let iconFrame = iconViews[chatsIdx].frame
+        let iw = itemW
 
         if badgeBgView == nil {
             let bg = UIView(); bg.layer.masksToBounds = true; addSubview(bg); badgeBgView = bg
-            let lbl = UILabel(); lbl.font = .systemFont(ofSize: 13); lbl.textAlignment = .center
-            bg.addSubview(lbl); badgeLabel = lbl
+            let lbl = UILabel(); lbl.font = .systemFont(ofSize: 13, weight: .regular)
+            lbl.textAlignment = .center; bg.addSubview(lbl); badgeLabel = lbl
         }
         guard let bg = badgeBgView, let lbl = badgeLabel else { return }
         bg.isHidden = false
@@ -347,19 +358,19 @@ final class RosettaTabBarUIView: UIView {
         lbl.text = text; lbl.sizeToFit()
 
         let textW = lbl.frame.width
-        let bgW = text.count == 1 ? 18.0 : max(18.0, textW + 10)
+        let bgW = text.count == 1 ? 18.0 : max(18.0, textW + 11)
         let bgH: CGFloat = 18
-        bg.frame = CGRect(x: iconFrame.maxX - 6, y: iconFrame.minY - 1, width: bgW, height: bgH)
+        let itemX = innerInset + CGFloat(chatsIdx) * iw
+        bg.frame = CGRect(x: itemX + floor(iw / 2) + 25 - bgW - 1, y: 7, width: bgW, height: bgH)
         bg.layer.cornerRadius = bgH / 2
         lbl.frame = CGRect(x: (bgW - textW) / 2, y: 0.5, width: textW, height: bgH - 1)
+        bringSubviewToFront(bg)
     }
 
     override func traitCollectionDidChange(_ prev: UITraitCollection?) {
         super.traitCollectionDidChange(prev)
         if traitCollection.hasDifferentColorAppearance(comparedTo: prev) {
-            appliedColorHex.removeAll()
-            updateSelection(animated: false)
-            layoutBadge()
+            applyAllColors()
         }
     }
 }