Remove Deprecated RenderUnconstrainedBox (#111711)

packages/flutter/lib/src/rendering/shifted_box.dart

@@ -879,91 +879,6 @@ class RenderConstraintsTransformBox extends RenderAligningShiftedBox with DebugO
   }
 }
 
-/// Renders a box, imposing no constraints on its child, allowing the child to
-/// render at its "natural" size.
-///
-/// The class is deprecated, use [RenderConstraintsTransformBox] instead.
-///
-/// This allows a child to render at the size it would render if it were alone
-/// on an infinite canvas with no constraints. This box will then attempt to
-/// adopt the same size, within the limits of its own constraints. If it ends
-/// up with a different size, it will align the child based on [alignment].
-/// If the box cannot expand enough to accommodate the entire child, the
-/// child will be clipped.
-///
-/// In debug mode, if the child overflows the box, a warning will be printed on
-/// the console, and black and yellow striped areas will appear where the
-/// overflow occurs.
-///
-/// See also:
-///
-///  * [RenderConstrainedBox], which renders a box which imposes constraints
-///    on its child.
-///  * [RenderConstrainedOverflowBox], which renders a box that imposes different
-///    constraints on its child than it gets from its parent, possibly allowing
-///    the child to overflow the parent.
-///  * [RenderSizedOverflowBox], a render object that is a specific size but
-///    passes its original constraints through to its child, which it allows to
-///    overflow.
-///
-@Deprecated(
-  'Use RenderConstraintsTransformBox instead. '
-  'This feature was deprecated after v2.1.0-11.0.pre.',
-)
-class RenderUnconstrainedBox extends RenderConstraintsTransformBox {
-  /// Create a render object that sizes itself to the child but does not
-  /// pass the [constraints] down to that child.
-  ///
-  /// The [alignment] and [clipBehavior] must not be null.
-  @Deprecated(
-    'Use RenderConstraintsTransformBox instead. '
-    'This feature was deprecated after v2.1.0-11.0.pre.',
-  )
-  RenderUnconstrainedBox({
-    required super.alignment,
-    required super.textDirection,
-    Axis? constrainedAxis,
-    super.child,
-    super.clipBehavior,
-  }) : assert(alignment != null),
-       assert(clipBehavior != null),
-       _constrainedAxis = constrainedAxis,
-       super(
-         constraintsTransform: _convertAxis(constrainedAxis),
-       );
-
-  /// The axis to retain constraints on, if any.
-  ///
-  /// If not set, or set to null (the default), neither axis will retain its
-  /// constraints. If set to [Axis.vertical], then vertical constraints will
-  /// be retained, and if set to [Axis.horizontal], then horizontal constraints
-  /// will be retained.
-  Axis? get constrainedAxis => _constrainedAxis;
-  Axis? _constrainedAxis;
-  set constrainedAxis(Axis? value) {
-    if (_constrainedAxis == value) {
-      return;
-    }
-    _constrainedAxis = value;
-    constraintsTransform = _convertAxis(constrainedAxis);
-  }
-
-  static BoxConstraints _unconstrained(BoxConstraints constraints) => const BoxConstraints();
-  static BoxConstraints _widthConstrained(BoxConstraints constraints) => constraints.widthConstraints();
-  static BoxConstraints _heightConstrained(BoxConstraints constraints) => constraints.heightConstraints();
-  static BoxConstraintsTransform _convertAxis(Axis? constrainedAxis) {
-    if (constrainedAxis == null) {
-      return _unconstrained;
-    }
-    switch (constrainedAxis) {
-      case Axis.horizontal:
-        return _widthConstrained;
-      case Axis.vertical:
-        return _heightConstrained;
-    }
-  }
-}
-
 /// A render object that is a specific size but passes its original constraints
 /// through to its child, which it allows to overflow.
 ///

packages/flutter/test/rendering/box_test.dart

@@ -336,8 +336,8 @@ void main() {
   });
 
   test('UnconstrainedBox expands to fit children', () {
-    final RenderUnconstrainedBox unconstrained = RenderUnconstrainedBox(
-      constrainedAxis: Axis.horizontal, // This is reset to null below.
+    final RenderConstraintsTransformBox unconstrained = RenderConstraintsTransformBox(
+      constraintsTransform: ConstraintsTransformBox.widthUnconstrained,
       textDirection: TextDirection.ltr,
       child: RenderConstrainedBox(
         additionalConstraints: const BoxConstraints.tightFor(width: 200.0, height: 200.0),
@@ -354,7 +354,7 @@ void main() {
       ),
     );
     // Check that we can update the constrained axis to null.
-    unconstrained.constrainedAxis = null;
+    unconstrained.constraintsTransform = ConstraintsTransformBox.unconstrained;
     TestRenderingFlutterBinding.instance.reassembleApplication();
 
     expect(unconstrained.size.width, equals(200.0), reason: 'unconstrained width');
@@ -362,7 +362,8 @@ void main() {
   });
 
   test('UnconstrainedBox handles vertical overflow', () {
-    final RenderUnconstrainedBox unconstrained = RenderUnconstrainedBox(
+    final RenderConstraintsTransformBox unconstrained = RenderConstraintsTransformBox(
+      constraintsTransform: ConstraintsTransformBox.unconstrained,
       textDirection: TextDirection.ltr,
       child: RenderConstrainedBox(
         additionalConstraints: const BoxConstraints.tightFor(height: 200.0),
@@ -378,7 +379,8 @@ void main() {
   });
 
   test('UnconstrainedBox handles horizontal overflow', () {
-    final RenderUnconstrainedBox unconstrained = RenderUnconstrainedBox(
+    final RenderConstraintsTransformBox unconstrained = RenderConstraintsTransformBox(
+      constraintsTransform: ConstraintsTransformBox.unconstrained,
       textDirection: TextDirection.ltr,
       child: RenderConstrainedBox(
         additionalConstraints: const BoxConstraints.tightFor(width: 200.0),
@@ -508,7 +510,8 @@ void main() {
   });
 
   test ('getMinIntrinsicWidth error handling', () {
-    final RenderUnconstrainedBox unconstrained = RenderUnconstrainedBox(
+    final RenderConstraintsTransformBox unconstrained = RenderConstraintsTransformBox(
+      constraintsTransform: ConstraintsTransformBox.unconstrained,
       textDirection: TextDirection.ltr,
       child: RenderConstrainedBox(
         additionalConstraints: const BoxConstraints.tightFor(width: 200.0),
@@ -632,7 +635,8 @@ void main() {
   });
 
   test('UnconstrainedBox.toStringDeep returns useful information', () {
-    final RenderUnconstrainedBox unconstrained = RenderUnconstrainedBox(
+    final RenderConstraintsTransformBox unconstrained = RenderConstraintsTransformBox(
+      constraintsTransform: ConstraintsTransformBox.unconstrained,
       textDirection: TextDirection.ltr,
       alignment: Alignment.center,
     );
@@ -642,7 +646,7 @@ void main() {
     expect(
       unconstrained.toStringDeep(minLevel: DiagnosticLevel.info),
       equalsIgnoringHashCodes(
-        'RenderUnconstrainedBox#00000 NEEDS-LAYOUT NEEDS-PAINT DETACHED\n'
+        'RenderConstraintsTransformBox#00000 NEEDS-LAYOUT NEEDS-PAINT DETACHED\n'
           '   parentData: MISSING\n'
           '   constraints: MISSING\n'
           '   size: MISSING\n'
@@ -655,8 +659,8 @@ void main() {
   test('UnconstrainedBox honors constrainedAxis=Axis.horizontal', () {
     final RenderConstrainedBox flexible =
         RenderConstrainedBox(additionalConstraints: const BoxConstraints.expand(height: 200.0));
-    final RenderUnconstrainedBox unconstrained = RenderUnconstrainedBox(
-      constrainedAxis: Axis.horizontal,
+    final RenderConstraintsTransformBox unconstrained = RenderConstraintsTransformBox(
+      constraintsTransform: ConstraintsTransformBox.heightUnconstrained,
       textDirection: TextDirection.ltr,
       child: RenderFlex(
         textDirection: TextDirection.ltr,
@@ -678,8 +682,8 @@ void main() {
   test('UnconstrainedBox honors constrainedAxis=Axis.vertical', () {
     final RenderConstrainedBox flexible =
     RenderConstrainedBox(additionalConstraints: const BoxConstraints.expand(width: 200.0));
-    final RenderUnconstrainedBox unconstrained = RenderUnconstrainedBox(
-      constrainedAxis: Axis.vertical,
+    final RenderConstraintsTransformBox unconstrained = RenderConstraintsTransformBox(
+      constraintsTransform: ConstraintsTransformBox.widthUnconstrained,
       textDirection: TextDirection.ltr,
       child: RenderFlex(
         direction: Axis.vertical,
@@ -710,13 +714,14 @@ void main() {
     }
 
     for (final Clip? clip in <Clip?>[null, ...Clip.values]) {
-      final RenderUnconstrainedBox box;
+      final RenderConstraintsTransformBox box;
       switch (clip) {
         case Clip.none:
         case Clip.hardEdge:
         case Clip.antiAlias:
         case Clip.antiAliasWithSaveLayer:
-          box = RenderUnconstrainedBox(
+          box = RenderConstraintsTransformBox(
+            constraintsTransform: ConstraintsTransformBox.unconstrained,
             alignment: Alignment.center,
             textDirection: TextDirection.ltr,
             child: box200x200,
@@ -724,7 +729,8 @@ void main() {
           );
           break;
         case null:
-          box = RenderUnconstrainedBox(
+          box = RenderConstraintsTransformBox(
+            constraintsTransform: ConstraintsTransformBox.unconstrained,
             alignment: Alignment.center,
             textDirection: TextDirection.ltr,
             child: box200x200,