Yattee v2 rewrite

Yattee/Extensions/View+LiquidGlassSheet.swift

@@ -0,0 +1,150 @@
+//
+//  View+LiquidGlassSheet.swift
+//  Yattee
+//
+//  View modifiers for iOS 26 Liquid Glass morphing sheet transitions.
+//
+
+import SwiftUI
+
+// MARK: - Transition Source Modifier (for Views)
+
+/// View modifier that marks a view as the source for a morphing sheet transition.
+/// Apply this to a Button inside a ToolbarItem to enable the morphing effect on iOS 26+.
+struct LiquidGlassTransitionSourceModifier: ViewModifier {
+    let id: String
+    let namespace: Namespace.ID
+
+    func body(content: Content) -> some View {
+        #if os(iOS)
+        if #available(iOS 26, *) {
+            content
+                .matchedTransitionSource(id: id, in: namespace)
+        } else {
+            content
+        }
+        #else
+        content
+        #endif
+    }
+}
+
+// MARK: - Sheet Content Modifier (for sheet content)
+
+/// View modifier that applies the zoom navigation transition to sheet content.
+/// Apply this to the content inside a .sheet() to complete the morphing effect on iOS 26+.
+struct LiquidGlassSheetContentModifier: ViewModifier {
+    let sourceID: String
+    let namespace: Namespace.ID
+
+    func body(content: Content) -> some View {
+        #if os(iOS)
+        if #available(iOS 26, *) {
+            content
+                .navigationTransition(.zoom(sourceID: sourceID, in: namespace))
+        } else {
+            content
+        }
+        #else
+        content
+        #endif
+    }
+}
+
+// MARK: - View Extensions
+
+extension View {
+    /// Marks this view as the source for a Liquid Glass morphing sheet transition.
+    ///
+    /// Apply this modifier to a Button (or other view) that presents a sheet. On iOS 26+,
+    /// the sheet will morph from this view when presented.
+    ///
+    /// - Parameters:
+    ///   - id: Unique identifier for the transition (must match the sheet content's sourceID).
+    ///   - namespace: A namespace for the matched geometry effect.
+    ///
+    /// Example:
+    /// ```swift
+    /// @Namespace private var sheetTransition
+    ///
+    /// .toolbar {
+    ///     ToolbarItem(placement: .primaryAction) {
+    ///         Button { showSheet = true } label: {
+    ///             Image(systemName: "gear")
+    ///         }
+    ///         .liquidGlassTransitionSource(id: "settings", in: sheetTransition)
+    ///     }
+    /// }
+    /// ```
+    func liquidGlassTransitionSource(
+        id: String,
+        in namespace: Namespace.ID
+    ) -> some View {
+        modifier(LiquidGlassTransitionSourceModifier(id: id, namespace: namespace))
+    }
+
+    /// Applies the Liquid Glass morphing transition to sheet content.
+    ///
+    /// Apply this modifier to the content inside a `.sheet()` modifier. On iOS 26+,
+    /// the sheet will morph from the matched transition source when presented.
+    ///
+    /// - Parameters:
+    ///   - sourceID: Unique identifier matching the transition source's id.
+    ///   - namespace: A namespace for the matched geometry effect (must match the source).
+    ///
+    /// Example:
+    /// ```swift
+    /// .sheet(isPresented: $showSheet) {
+    ///     SettingsView()
+    ///         .liquidGlassSheetContent(sourceID: "settings", in: sheetTransition)
+    /// }
+    /// ```
+    func liquidGlassSheetContent(
+        sourceID: String,
+        in namespace: Namespace.ID
+    ) -> some View {
+        modifier(LiquidGlassSheetContentModifier(sourceID: sourceID, namespace: namespace))
+    }
+}
+
+// MARK: - ToolbarContent Extension
+
+extension ToolbarContent {
+    /// Marks this toolbar content as the source for a Liquid Glass morphing sheet transition.
+    ///
+    /// Apply this modifier to a `ToolbarItem` that presents a sheet. On iOS 26+,
+    /// the sheet will morph from this toolbar item when presented.
+    ///
+    /// - Parameters:
+    ///   - id: Unique identifier for the transition (must match the sheet content's sourceID).
+    ///   - namespace: A namespace for the matched geometry effect.
+    ///
+    /// Example:
+    /// ```swift
+    /// @Namespace private var sheetTransition
+    ///
+    /// .toolbar {
+    ///     ToolbarItem(placement: .primaryAction) {
+    ///         Button { showSheet = true } label: {
+    ///             Image(systemName: "gear")
+    ///         }
+    ///     }
+    ///     .liquidGlassTransitionSource(id: "settings", in: sheetTransition)
+    /// }
+    /// ```
+    @ToolbarContentBuilder
+    func liquidGlassTransitionSource(
+        id: String,
+        in namespace: Namespace.ID
+    ) -> some ToolbarContent {
+        #if os(iOS)
+        if #available(iOS 26, *) {
+            self.matchedTransitionSource(id: id, in: namespace)
+        } else {
+            self
+        }
+        #else
+        self
+        #endif
+    }
+}