Bring back the terminal backend to life.

Package.swift

@@ -73,7 +73,7 @@ let package = Package(
         .library(name: "Gtk", type: libraryType, targets: ["Gtk"]),
         .library(name: "Gtk3", type: libraryType, targets: ["Gtk3"]),
         .executable(name: "GtkExample", targets: ["GtkExample"]),
-        // .library(name: "CursesBackend", type: libraryType, targets: ["CursesBackend"]),
+         .library(name: "TermKitBackend", type: libraryType, targets: ["TermKitBackend"]),
         // .library(name: "QtBackend", type: libraryType, targets: ["QtBackend"]),
         // .library(name: "LVGLBackend", type: libraryType, targets: ["LVGLBackend"]),
     ],
@@ -110,10 +110,10 @@ let package = Package(
             url: "https://github.com/stackotter/swift-winui",
             branch: "927e2c46430cfb1b6c195590b9e65a30a8fd98a2"
         ),
-        // .package(
-        //     url: "https://github.com/stackotter/TermKit",
-        //     revision: "163afa64f1257a0c026cc83ed8bc47a5f8fc9704"
-        // ),
+         .package(
+             url: "https://github.com/migueldeicaza/TermKit",
+             revision: "6b82436223a739af53b19045784b4bbc3f92505f"
+         ),
         // .package(
         //     url: "https://github.com/PADL/LVGLSwift",
         //     revision: "19c19a942153b50d61486faf1d0d45daf79e7be5"
@@ -252,10 +252,10 @@ let package = Package(
             name: "WinUIInterop",
             dependencies: []
         ),
-        // .target(
-        //     name: "CursesBackend",
-        //     dependencies: ["SwiftCrossUI", "TermKit"]
-        // ),
+         .target(
+             name: "TermKitBackend",
+             dependencies: ["SwiftCrossUI", .product(name: "TermKit", package: "TermKit")]
+         ),
         // .target(
         //     name: "QtBackend",
         //     dependencies: ["SwiftCrossUI", .product(name: "Qlift", package: "qlift")]

Sources/SwiftCrossUI/Backend/AppBackend.swift

@@ -63,6 +63,9 @@ public protocol AppBackend: Sendable {
     /// The default amount of padding used when a user uses the ``View/padding(_:_:)``
     /// modifier.
     var defaultPaddingAmount: Int { get }
+    /// The default amount of spacing used when a user uses the ``HStack`` or ``VStack``
+    /// classes
+    var defaultStackSpacingAmount: Int { get }
     /// Gets the layout width of a backend's scroll bars. Assumes that the width
     /// is the same for both vertical and horizontal scroll bars (where the width
     /// of a horizontal scroll bar is what pedants may call its height). If the
@@ -693,6 +696,8 @@ public protocol AppBackend: Sendable {
     )
     /// Navigates a web view to a given URL.
     func navigateWebView(_ webView: Widget, to url: URL)
+
+    func limitScreenBounds(_ bounds: SIMD2<Int>) -> SIMD2<Int>
 }
 
 extension AppBackend {
@@ -709,6 +714,7 @@ extension AppBackend {
 }
 
 extension AppBackend {
+    public var defaultStackSpacingAmount: Int { 10 }
     /// Used by placeholder implementations of backend methods.
     private func todo(_ function: String = #function) -> Never {
         print("\(type(of: self)): \(function) not implemented")
@@ -1139,4 +1145,8 @@ extension AppBackend {
     ) {
         todo()
     }
+
+    public func limitScreenBounds(_ bounds: SIMD2<Int>) -> SIMD2<Int> {
+        return bounds
+    }
 }

Sources/SwiftCrossUI/Scenes/WindowGroupNode.swift

@@ -88,8 +88,8 @@ public final class WindowGroupNode<Content: View>: SceneGraphNode {
         _ = update(
             newScene,
             proposedWindowSize: isFirstUpdate && isProgramaticallyResizable
-                ? (newScene ?? scene).defaultSize
-                : backend.size(ofWindow: window),
+            ? backend.limitScreenBounds((newScene ?? scene).defaultSize)
+            : backend.limitScreenBounds(backend.size(ofWindow: window)),
             backend: backend,
             environment: environment,
             windowSizeIsFinal: !isProgramaticallyResizable

Sources/SwiftCrossUI/Views/HStack.swift

@@ -3,7 +3,7 @@ public struct HStack<Content: View>: View {
     public var body: Content
 
     /// The amount of spacing to apply between children.
-    private var spacing: Int
+    private var spacing: Int?
     /// The alignment of the stack's children in the vertical direction.
     private var alignment: VerticalAlignment
 
@@ -14,7 +14,7 @@ public struct HStack<Content: View>: View {
         @ViewBuilder _ content: () -> Content
     ) {
         body = content()
-        self.spacing = spacing ?? VStack<EmptyView>.defaultSpacing
+        self.spacing = spacing
         self.alignment = alignment
     }
 
@@ -45,7 +45,7 @@ public struct HStack<Content: View>: View {
                 environment
                 .with(\.layoutOrientation, .horizontal)
                 .with(\.layoutAlignment, alignment.asStackAlignment)
-                .with(\.layoutSpacing, spacing),
+                .with(\.layoutSpacing, spacing ?? backend.defaultStackSpacingAmount),
             backend: backend,
             dryRun: dryRun
         )

Sources/SwiftCrossUI/Views/VStack.swift

@@ -1,11 +1,9 @@
 /// A view that arranges its subviews vertically.
 public struct VStack<Content: View>: View {
-    static var defaultSpacing: Int { 10 }
-
     public var body: Content
 
     /// The amount of spacing to apply between children.
-    private var spacing: Int
+    private var spacing: Int?
     /// The alignment of the stack's children in the horizontal direction.
     private var alignment: HorizontalAlignment
 
@@ -24,7 +22,7 @@ public struct VStack<Content: View>: View {
         content: Content
     ) {
         body = content
-        self.spacing = spacing ?? Self.defaultSpacing
+        self.spacing = spacing
         self.alignment = alignment
     }
 
@@ -55,7 +53,7 @@ public struct VStack<Content: View>: View {
                 environment
                 .with(\.layoutOrientation, .vertical)
                 .with(\.layoutAlignment, alignment.asStackAlignment)
-                .with(\.layoutSpacing, spacing),
+                .with(\.layoutSpacing, spacing ?? backend.defaultStackSpacingAmount),
             backend: backend,
             dryRun: dryRun
         )