Initial commit

WhiteNights/Utils/MarqueeText.swift

@@ -0,0 +1,71 @@
+import SwiftUI
+
+struct MarqueeText: View {
+    let text: String
+    let font: Font
+    let foregroundColor: Color
+    private let speed: CGFloat = 10 // пикселей в секунду
+
+    @State private var textWidth: CGFloat = 0
+    @State private var containerWidth: CGFloat = 0
+    @State private var offset: CGFloat = 0
+    @State private var animationStarted = false
+
+    var body: some View {
+        GeometryReader { geo in
+            Text(text)
+                .font(font)
+                .foregroundColor(foregroundColor)
+                .lineLimit(1)
+                .fixedSize() // важно, чтобы не обрезался
+                .background(WidthGetter())
+                .offset(x: offset)
+                .onAppear {
+                    containerWidth = geo.size.width
+                    if textWidth > containerWidth, !animationStarted {
+                        animationStarted = true
+                        let distance = textWidth - containerWidth
+                        let duration = Double(distance / speed)
+                        withAnimation(.linear(duration: duration).repeatForever(autoreverses: true)) {
+                            offset = -distance
+                        }
+                    }
+                }
+                .clipped()
+        }
+        .frame(height: lineHeight(for: font))
+        .onPreferenceChange(WidthKey.self) { width in
+            textWidth = width
+        }
+    }
+
+    private func lineHeight(for font: Font) -> CGFloat {
+        switch font {
+        case .largeTitle: return 34
+        case .title: return 28
+        case .title2: return 22
+        case .title3: return 20
+        case .headline: return 17
+        case .body: return 17
+        case .callout: return 16
+        case .subheadline: return 15
+        case .caption: return 13
+        case .caption2: return 12
+        default: return 17
+        }
+    }
+}
+
+// MARK: — Helpers для измерения ширины текста
+private struct WidthKey: PreferenceKey {
+    static var defaultValue: CGFloat = 0
+    static func reduce(value: inout CGFloat, nextValue: () -> CGFloat) { value = nextValue() }
+}
+
+private struct WidthGetter: View {
+    var body: some View {
+        GeometryReader { geo in
+            Color.clear.preference(key: WidthKey.self, value: geo.size.width)
+        }
+    }
+}