Add elastic interpolation to Flutter runtime

Fixes crash @LauraRive caught when editing a file with nested artboards.

Diffs=
389618e94 Add elastic interpolation to Flutter runtime (#6158)

Co-authored-by: Luigi Rosso <luigi-rosso@users.noreply.github.com>

.rive_head

@@ -1 +1 @@
-6d9aa017961638f7576a2ea52a8928c813e28dbb
+389618e94df7e4bc002a06cb84ce1ec9ac3b0ab0

CHANGELOG.md

@@ -1,7 +1,6 @@
-## 0.12.0
+## 0.12.1
 
-- Increase HTTP dependency range for Rive and Rive Common
-- Update api for loading rive files, simplifying loading external images & fonts.
+- Elastic easing.
 
 ## 0.11.17
 

analysis_options.yaml

@@ -50,12 +50,11 @@ linter:
     - hash_and_equals
     - implementation_imports
     #  - invariant_booleans # too many false positives: https://github.com/dart-lang/linter/issues/811
-    - iterable_contains_unrelated_type
+    - collection_methods_unrelated_type
     - join_return_with_assignment
     - library_names
     - library_prefixes
     - lines_longer_than_80_chars
-    - list_remove_unrelated_type
     # - literal_only_boolean_expressions # too many false positives: https://github.com/dart-lang/sdk/issues/34181
     - no_adjacent_strings_in_list
     - no_duplicate_case_values

lib/src/generated/animation/cubic_ease_interpolator_base.dart

@@ -2,6 +2,7 @@
 // lib/src/generated/animation/cubic_ease_interpolator_base.dart.
 // Do not modify manually.
 
+import 'package:rive/src/generated/animation/keyframe_interpolator_base.dart';
 import 'package:rive/src/rive_core/animation/cubic_interpolator.dart';
 
 abstract class CubicEaseInterpolatorBase extends CubicInterpolator {
@@ -9,6 +10,9 @@ abstract class CubicEaseInterpolatorBase extends CubicInterpolator {
   @override
   int get coreType => CubicEaseInterpolatorBase.typeKey;
   @override
-  Set<int> get coreTypes =>
-      {CubicEaseInterpolatorBase.typeKey, CubicInterpolatorBase.typeKey};
+  Set<int> get coreTypes => {
+        CubicEaseInterpolatorBase.typeKey,
+        CubicInterpolatorBase.typeKey,
+        KeyFrameInterpolatorBase.typeKey
+      };
 }

lib/src/generated/animation/cubic_interpolator_base.dart

@@ -3,13 +3,15 @@
 // Do not modify manually.
 
 import 'package:rive/src/core/core.dart';
+import 'package:rive/src/rive_core/animation/keyframe_interpolator.dart';
 
-abstract class CubicInterpolatorBase<T extends CoreContext> extends Core<T> {
+abstract class CubicInterpolatorBase extends KeyFrameInterpolator {
   static const int typeKey = 139;
   @override
   int get coreType => CubicInterpolatorBase.typeKey;
   @override
-  Set<int> get coreTypes => {CubicInterpolatorBase.typeKey};
+  Set<int> get coreTypes =>
+      {CubicInterpolatorBase.typeKey, KeyFrameInterpolatorBase.typeKey};
 
   /// --------------------------------------------------------------------------
   /// X1 field with key 63.
@@ -101,6 +103,7 @@ abstract class CubicInterpolatorBase<T extends CoreContext> extends Core<T> {
 
   @override
   void copy(Core source) {
+    super.copy(source);
     if (source is CubicInterpolatorBase) {
       _x1 = source._x1;
       _y1 = source._y1;

lib/src/generated/animation/cubic_value_interpolator_base.dart

@@ -2,6 +2,7 @@
 // lib/src/generated/animation/cubic_value_interpolator_base.dart.
 // Do not modify manually.
 
+import 'package:rive/src/generated/animation/keyframe_interpolator_base.dart';
 import 'package:rive/src/rive_core/animation/cubic_interpolator.dart';
 
 abstract class CubicValueInterpolatorBase extends CubicInterpolator {
@@ -9,6 +10,9 @@ abstract class CubicValueInterpolatorBase extends CubicInterpolator {
   @override
   int get coreType => CubicValueInterpolatorBase.typeKey;
   @override
-  Set<int> get coreTypes =>
-      {CubicValueInterpolatorBase.typeKey, CubicInterpolatorBase.typeKey};
+  Set<int> get coreTypes => {
+        CubicValueInterpolatorBase.typeKey,
+        CubicInterpolatorBase.typeKey,
+        KeyFrameInterpolatorBase.typeKey
+      };
 }

lib/src/generated/animation/elastic_interpolator_base.dart

@@ -0,0 +1,97 @@
+// Core automatically generated
+// lib/src/generated/animation/elastic_interpolator_base.dart.
+// Do not modify manually.
+
+import 'package:rive/src/core/core.dart';
+import 'package:rive/src/rive_core/animation/keyframe_interpolator.dart';
+
+abstract class ElasticInterpolatorBase extends KeyFrameInterpolator {
+  static const int typeKey = 174;
+  @override
+  int get coreType => ElasticInterpolatorBase.typeKey;
+  @override
+  Set<int> get coreTypes =>
+      {ElasticInterpolatorBase.typeKey, KeyFrameInterpolatorBase.typeKey};
+
+  /// --------------------------------------------------------------------------
+  /// EasingValue field with key 405.
+  static const int easingValuePropertyKey = 405;
+  static const int easingValueInitialValue = 1;
+  int _easingValue = easingValueInitialValue;
+  int get easingValue => _easingValue;
+
+  /// Change the [_easingValue] field value.
+  /// [easingValueChanged] will be invoked only if the field's value has
+  /// changed.
+  set easingValue(int value) {
+    if (_easingValue == value) {
+      return;
+    }
+    int from = _easingValue;
+    _easingValue = value;
+    if (hasValidated) {
+      easingValueChanged(from, value);
+    }
+  }
+
+  void easingValueChanged(int from, int to);
+
+  /// --------------------------------------------------------------------------
+  /// Amplitude field with key 406.
+  static const int amplitudePropertyKey = 406;
+  static const double amplitudeInitialValue = 1;
+  double _amplitude = amplitudeInitialValue;
+
+  /// The amplitude for the easing expressed as a percentage of the change.
+  double get amplitude => _amplitude;
+
+  /// Change the [_amplitude] field value.
+  /// [amplitudeChanged] will be invoked only if the field's value has changed.
+  set amplitude(double value) {
+    if (_amplitude == value) {
+      return;
+    }
+    double from = _amplitude;
+    _amplitude = value;
+    if (hasValidated) {
+      amplitudeChanged(from, value);
+    }
+  }
+
+  void amplitudeChanged(double from, double to);
+
+  /// --------------------------------------------------------------------------
+  /// Period field with key 407.
+  static const int periodPropertyKey = 407;
+  static const double periodInitialValue = 1;
+  double _period = periodInitialValue;
+
+  /// The period of the elastic expressed as a percentage of the time
+  /// difference.
+  double get period => _period;
+
+  /// Change the [_period] field value.
+  /// [periodChanged] will be invoked only if the field's value has changed.
+  set period(double value) {
+    if (_period == value) {
+      return;
+    }
+    double from = _period;
+    _period = value;
+    if (hasValidated) {
+      periodChanged(from, value);
+    }
+  }
+
+  void periodChanged(double from, double to);
+
+  @override
+  void copy(Core source) {
+    super.copy(source);
+    if (source is ElasticInterpolatorBase) {
+      _easingValue = source._easingValue;
+      _amplitude = source._amplitude;
+      _period = source._period;
+    }
+  }
+}

lib/src/generated/animation/keyframe_interpolator_base.dart

@@ -0,0 +1,13 @@
+// Core automatically generated
+// lib/src/generated/animation/keyframe_interpolator_base.dart.
+// Do not modify manually.
+
+import 'package:rive/src/core/core.dart';
+
+abstract class KeyFrameInterpolatorBase<T extends CoreContext> extends Core<T> {
+  static const int typeKey = 175;
+  @override
+  int get coreType => KeyFrameInterpolatorBase.typeKey;
+  @override
+  Set<int> get coreTypes => {KeyFrameInterpolatorBase.typeKey};
+}

lib/src/generated/rive_core_context.dart

@@ -47,6 +47,7 @@ import 'package:rive/src/rive_core/animation/blend_state_transition.dart';
 import 'package:rive/src/rive_core/animation/cubic_ease_interpolator.dart';
 import 'package:rive/src/rive_core/animation/cubic_interpolator_component.dart';
 import 'package:rive/src/rive_core/animation/cubic_value_interpolator.dart';
+import 'package:rive/src/rive_core/animation/elastic_interpolator.dart';
 import 'package:rive/src/rive_core/animation/entry_state.dart';
 import 'package:rive/src/rive_core/animation/exit_state.dart';
 import 'package:rive/src/rive_core/animation/keyed_object.dart';
@@ -240,6 +241,8 @@ class RiveCoreContext {
         return BlendStateDirect();
       case NestedStateMachineBase.typeKey:
         return NestedStateMachine();
+      case ElasticInterpolatorBase.typeKey:
+        return ElasticInterpolator();
       case ExitStateBase.typeKey:
         return ExitState();
       case NestedNumberBase.typeKey:
@@ -878,6 +881,21 @@ class RiveCoreContext {
           object.occursValue = value;
         }
         break;
+      case ElasticInterpolatorBase.easingValuePropertyKey:
+        if (object is ElasticInterpolatorBase && value is int) {
+          object.easingValue = value;
+        }
+        break;
+      case ElasticInterpolatorBase.amplitudePropertyKey:
+        if (object is ElasticInterpolatorBase && value is double) {
+          object.amplitude = value;
+        }
+        break;
+      case ElasticInterpolatorBase.periodPropertyKey:
+        if (object is ElasticInterpolatorBase && value is double) {
+          object.period = value;
+        }
+        break;
       case NestedNumberBase.nestedValuePropertyKey:
         if (object is NestedNumberBase && value is double) {
           object.nestedValue = value;
@@ -1718,6 +1736,7 @@ class RiveCoreContext {
       case StateTransitionBase.interpolatorIdPropertyKey:
       case StateMachineFireEventBase.eventIdPropertyKey:
       case StateMachineFireEventBase.occursValuePropertyKey:
+      case ElasticInterpolatorBase.easingValuePropertyKey:
       case BlendState1DBase.inputIdPropertyKey:
       case BlendStateTransitionBase.exitBlendAnimationIdPropertyKey:
       case StrokeBase.capPropertyKey:
@@ -1795,6 +1814,8 @@ class RiveCoreContext {
       case CubicInterpolatorComponentBase.y2PropertyKey:
       case ListenerNumberChangeBase.valuePropertyKey:
       case KeyFrameDoubleBase.valuePropertyKey:
+      case ElasticInterpolatorBase.amplitudePropertyKey:
+      case ElasticInterpolatorBase.periodPropertyKey:
       case NestedNumberBase.nestedValuePropertyKey:
       case BlendAnimation1DBase.valuePropertyKey:
       case NestedRemapAnimationBase.timePropertyKey:
@@ -2063,6 +2084,8 @@ class RiveCoreContext {
         return (object as StateMachineFireEventBase).eventId;
       case StateMachineFireEventBase.occursValuePropertyKey:
         return (object as StateMachineFireEventBase).occursValue;
+      case ElasticInterpolatorBase.easingValuePropertyKey:
+        return (object as ElasticInterpolatorBase).easingValue;
       case BlendState1DBase.inputIdPropertyKey:
         return (object as BlendState1DBase).inputId;
       case BlendStateTransitionBase.exitBlendAnimationIdPropertyKey:
@@ -2221,6 +2244,10 @@ class RiveCoreContext {
         return (object as ListenerNumberChangeBase).value;
       case KeyFrameDoubleBase.valuePropertyKey:
         return (object as KeyFrameDoubleBase).value;
+      case ElasticInterpolatorBase.amplitudePropertyKey:
+        return (object as ElasticInterpolatorBase).amplitude;
+      case ElasticInterpolatorBase.periodPropertyKey:
+        return (object as ElasticInterpolatorBase).period;
       case NestedNumberBase.nestedValuePropertyKey:
         return (object as NestedNumberBase).nestedValue;
       case BlendAnimation1DBase.valuePropertyKey:
@@ -2783,6 +2810,11 @@ class RiveCoreContext {
           object.occursValue = value;
         }
         break;
+      case ElasticInterpolatorBase.easingValuePropertyKey:
+        if (object is ElasticInterpolatorBase) {
+          object.easingValue = value;
+        }
+        break;
       case BlendState1DBase.inputIdPropertyKey:
         if (object is BlendState1DBase) {
           object.inputId = value;
@@ -3168,6 +3200,16 @@ class RiveCoreContext {
           object.value = value;
         }
         break;
+      case ElasticInterpolatorBase.amplitudePropertyKey:
+        if (object is ElasticInterpolatorBase) {
+          object.amplitude = value;
+        }
+        break;
+      case ElasticInterpolatorBase.periodPropertyKey:
+        if (object is ElasticInterpolatorBase) {
+          object.period = value;
+        }
+        break;
       case NestedNumberBase.nestedValuePropertyKey:
         if (object is NestedNumberBase) {
           object.nestedValue = value;

lib/src/rive_core/animation/cubic_ease_interpolator.dart

@@ -43,8 +43,8 @@ class CubicEaseInterpolator extends CubicEaseInterpolatorBase {
       from + (to - from) * _ease.transform(value);
 
   @override
-  void updateStoredCubic() {
+  void updateInterpolator() {
     _ease = CubicEase.make(x1, y1, x2, y2);
-    super.updateStoredCubic();
+    super.updateInterpolator();
   }
 }

lib/src/rive_core/animation/cubic_interpolator.dart

@@ -1,7 +1,6 @@
 import 'package:rive/src/core/core.dart';
 import 'package:rive/src/generated/animation/cubic_interpolator_base.dart';
 import 'package:rive/src/rive_core/animation/interpolator.dart';
-import 'package:rive/src/rive_core/artboard.dart';
 
 export 'package:rive/src/generated/animation/cubic_interpolator_base.dart';
 
@@ -31,7 +30,7 @@ abstract class CubicInterface {
 
 // Returns dx/dt given t, x1, and x2, or dy/dt given t, y1, and y2.
 abstract class CubicInterpolator extends CubicInterpolatorBase
-    implements Interpolator, CubicInterface {
+    implements CubicInterface {
   @override
   bool equalParameters(Interpolator other) {
     if (other is CubicInterpolator) {
@@ -43,9 +42,6 @@ abstract class CubicInterpolator extends CubicInterpolatorBase
     return false;
   }
 
-  @override
-  void onAdded() => updateStoredCubic();
-
   @override
   void onAddedDirty() {}
 
@@ -56,30 +52,16 @@ abstract class CubicInterpolator extends CubicInterpolatorBase
   double transformValue(double from, double to, double value);
 
   @override
-  void x1Changed(double from, double to) => updateStoredCubic();
+  void x1Changed(double from, double to) => updateInterpolator();
 
   @override
-  void x2Changed(double from, double to) => updateStoredCubic();
+  void x2Changed(double from, double to) => updateInterpolator();
 
   @override
-  void y1Changed(double from, double to) => updateStoredCubic();
+  void y1Changed(double from, double to) => updateInterpolator();
 
   @override
-  void y2Changed(double from, double to) => updateStoredCubic();
-
-  @protected
-  void updateStoredCubic() {}
-
-  @override
-  bool import(ImportStack stack) {
-    var artboardHelper = stack.latest<ArtboardImporter>(ArtboardBase.typeKey);
-    if (artboardHelper == null) {
-      return false;
-    }
-    artboardHelper.addComponent(this);
-
-    return super.import(stack);
-  }
+  void y2Changed(double from, double to) => updateInterpolator();
 }
 
 // Helper to convert a factor in cubic space to t value. We use this to compute

lib/src/rive_core/animation/cubic_value_interpolator.dart

@@ -50,14 +50,14 @@ class CubicValueInterpolator extends CubicValueInterpolatorBase {
     if (_from != from || _to != to) {
       _from = from;
       _to = to;
-      updateStoredCubic();
+      updateInterpolator();
     }
     return _cubic.transform(value);
   }
 
   @override
-  void updateStoredCubic() {
+  void updateInterpolator() {
     _cubic = _CubicValue(x1, x2, _from, y1, y2, _to);
-    super.updateStoredCubic();
+    super.updateInterpolator();
   }
 }

lib/src/rive_core/animation/elastic_interpolator.dart

@@ -0,0 +1,146 @@
+// ignore_for_file: parameter_assignments
+
+import 'dart:math';
+
+import 'package:rive/src/core/core.dart';
+import 'package:rive/src/generated/animation/elastic_interpolator_base.dart';
+import 'package:rive/src/rive_core/animation/interpolator.dart';
+import 'package:rive/src/rive_core/artboard.dart';
+import 'package:rive/src/rive_core/enum_helper.dart';
+
+export 'package:rive/src/generated/animation/elastic_interpolator_base.dart';
+
+enum Easing {
+  easeIn,
+  easeOut,
+  easeInOut,
+}
+
+class ElasticEase {
+  final double amplitude;
+  final double s;
+  final double period;
+
+  ElasticEase(this.amplitude, this.period)
+      : s = amplitude < 1.0
+            ? period / 4
+            : period / (2 * pi) * asin(1.0 / amplitude);
+
+  double computeActualAmplitude(double time) {
+    if (amplitude < 1.0) {
+      /// We use this when the amplitude is less than 1.0 (amplitude is
+      /// described as factor of change in value). We also precompute s which is
+      /// the effective starting period we use to align the decaying sin with
+      /// our keyframe.
+      double t = s.abs();
+      if (time.abs() < t) {
+        double l = time.abs() / t;
+        return (amplitude * l) + (1.0 - l);
+      }
+    }
+
+    return amplitude;
+  }
+
+  double easeOut(double value) {
+    var time = value;
+
+    var actualAmplitude = computeActualAmplitude(time);
+
+    return (actualAmplitude *
+            pow(2, 10 * -time) *
+            sin((time - s) * (2 * pi) / period)) +
+        1;
+  }
+
+  double easeIn(double value) {
+    var time = value - 1;
+
+    var actualAmplitude = computeActualAmplitude(time);
+
+    return -(actualAmplitude *
+        pow(2, 10 * time) *
+        sin((-time - s) * (2 * pi) / period));
+  }
+
+  double easeInOut(double value) {
+    var time = value * 2 - 1;
+    var actualAmplitude = computeActualAmplitude(time);
+    if (time < 0) {
+      return -0.5 *
+          actualAmplitude *
+          pow(2, 10 * time) *
+          sin((-time - s) * (2 * pi) / period);
+    } else {
+      return 0.5 *
+              (actualAmplitude *
+                  pow(2, 10 * -time) *
+                  sin((time - s) * (2 * pi) / period)) +
+          1;
+    }
+  }
+}
+
+class ElasticInterpolator extends ElasticInterpolatorBase {
+  ElasticEase _elastic = ElasticEase(1.0, 0.5);
+
+  @override
+  bool equalParameters(Interpolator other) {
+    if (other is ElasticInterpolator) {
+      return easingValue == other.easingValue &&
+          amplitude == other.amplitude &&
+          period == other.period;
+    }
+    return false;
+  }
+
+  @override
+  void onAddedDirty() {}
+
+  @override
+  double transform(double value) {
+    switch (easing) {
+      case Easing.easeIn:
+        return _elastic.easeIn(value);
+      case Easing.easeOut:
+        return _elastic.easeOut(value);
+      case Easing.easeInOut:
+        return _elastic.easeInOut(value);
+    }
+  }
+
+  @override
+  double transformValue(double from, double to, double value) {
+    var f = transform(value);
+    return from + (to - from) * f;
+  }
+
+  @override
+  bool import(ImportStack stack) {
+    var artboardHelper = stack.latest<ArtboardImporter>(ArtboardBase.typeKey);
+    if (artboardHelper == null) {
+      return false;
+    }
+    artboardHelper.addComponent(this);
+
+    return super.import(stack);
+  }
+
+  Easing get easing => enumAt(Easing.values, easingValue);
+  set easing(Easing value) => easingValue = value.index;
+
+  @override
+  void updateInterpolator() {
+    _elastic = ElasticEase(amplitude, period);
+    super.updateInterpolator();
+  }
+
+  @override
+  void amplitudeChanged(double from, double to) => updateInterpolator();
+
+  @override
+  void easingValueChanged(int from, int to) => updateInterpolator();
+
+  @override
+  void periodChanged(double from, double to) => updateInterpolator();
+}

lib/src/rive_core/animation/interpolating_keyframe.dart

@@ -4,6 +4,7 @@ import 'package:rive/src/rive_core/animation/cubic_interpolator.dart';
 import 'package:rive/src/rive_core/animation/cubic_value_interpolator.dart';
 import 'package:rive/src/rive_core/animation/interpolator.dart';
 import 'package:rive/src/rive_core/animation/keyframe_interpolation.dart';
+import 'package:rive/src/rive_core/enum_helper.dart';
 
 export 'package:rive/src/generated/animation/interpolating_keyframe_base.dart';
 
@@ -12,7 +13,7 @@ abstract class InterpolatingKeyFrame extends InterpolatingKeyFrameBase {
   bool get canInterpolate => true;
 
   KeyFrameInterpolation get interpolation =>
-      KeyFrameInterpolation.values[interpolationType];
+      enumAt(KeyFrameInterpolation.values, interpolationType);
   set interpolation(KeyFrameInterpolation value) {
     interpolationType = value.index;
   }

lib/src/rive_core/animation/keyframe_interpolation.dart

@@ -13,4 +13,17 @@ enum KeyFrameInterpolation {
   /// Cubicly interpolate from incoming to outgoing value based on the
   /// [CubicInterpolator]'s parameters.
   cubicValue,
+
+  /// Elastic easing.
+  elastic,
+}
+
+extension KeyFrameInterpolationExtension on KeyFrameInterpolation {
+  /// Should this type use the interpolation value field beneath the
+  /// curve preview
+  bool get usesValuesField => [
+        KeyFrameInterpolation.hold,
+        KeyFrameInterpolation.linear,
+        KeyFrameInterpolation.cubic,
+      ].contains(this);
 }

lib/src/rive_core/animation/keyframe_interpolator.dart

@@ -0,0 +1,26 @@
+import 'package:rive/src/core/core.dart';
+import 'package:rive/src/generated/animation/keyframe_interpolator_base.dart';
+import 'package:rive/src/rive_core/animation/interpolator.dart';
+import 'package:rive/src/rive_core/artboard.dart';
+
+export 'package:rive/src/generated/animation/keyframe_interpolator_base.dart';
+
+abstract class KeyFrameInterpolator extends KeyFrameInterpolatorBase
+    implements Interpolator {
+  @override
+  void onAdded() => updateInterpolator();
+
+  @protected
+  void updateInterpolator() {}
+
+  @override
+  bool import(ImportStack stack) {
+    var artboardHelper = stack.latest<ArtboardImporter>(ArtboardBase.typeKey);
+    if (artboardHelper == null) {
+      return false;
+    }
+    artboardHelper.addComponent(this);
+
+    return super.import(stack);
+  }
+}

lib/src/rive_core/animation/state_machine_fire_event.dart

@@ -3,6 +3,7 @@ library rive_core;
 import 'package:rive/src/core/core.dart';
 import 'package:rive/src/generated/animation/state_machine_fire_event_base.dart';
 import 'package:rive/src/rive_core/animation/state_machine_layer_component.dart';
+import 'package:rive/src/rive_core/enum_helper.dart';
 
 export 'package:rive/src/generated/animation/state_machine_fire_event_base.dart';
 
@@ -22,7 +23,7 @@ class StateMachineFireEvent extends StateMachineFireEventBase {
   void occursValueChanged(int from, int to) {}
 
   StateMachineFireOccurance get occurs =>
-      StateMachineFireOccurance.values[occursValue];
+      enumAt(StateMachineFireOccurance.values, occursValue);
 
   @override
   bool import(ImportStack importStack) {

lib/src/rive_core/animation/state_transition.dart

@@ -15,6 +15,7 @@ import 'package:rive/src/rive_core/animation/loop.dart';
 import 'package:rive/src/rive_core/animation/state_instance.dart';
 import 'package:rive/src/rive_core/animation/transition_condition.dart';
 import 'package:rive/src/rive_core/animation/transition_trigger_condition.dart';
+import 'package:rive/src/rive_core/enum_helper.dart';
 import 'package:rive/src/rive_core/state_transition_flags.dart';
 
 export 'package:rive/src/generated/animation/state_transition_base.dart';
@@ -221,7 +222,7 @@ class StateTransition extends StateTransitionBase {
   bool get canInterpolate => stateTo is! EntryState;
 
   KeyFrameInterpolation get interpolation =>
-      KeyFrameInterpolation.values[interpolationType];
+      enumAt(KeyFrameInterpolation.values, interpolationType);
   set interpolation(KeyFrameInterpolation value) {
     if (canInterpolate) {
       interpolationType = value.index;

lib/src/rive_core/artboard.dart

@@ -113,11 +113,6 @@ class Artboard extends ArtboardBase with ShapePaintContainer {
     return null;
   }
 
-  /// Find all components of a specific type.
-  Iterable<T> components<T>() {
-    return _components.whereType<T>();
-  }
-
   @override
   Artboard get artboard => this;
 

lib/src/rive_core/constraints/distance_constraint.dart

@@ -1,4 +1,5 @@
 import 'package:rive/src/generated/constraints/distance_constraint_base.dart';
+import 'package:rive/src/rive_core/enum_helper.dart';
 import 'package:rive/src/rive_core/transform_component.dart';
 import 'package:rive_common/math.dart';
 
@@ -57,6 +58,7 @@ class DistanceConstraint extends DistanceConstraintBase {
   @override
   void modeValueChanged(int from, int to) => markConstraintDirty();
 
-  DistanceConstraintMode get mode => DistanceConstraintMode.values[modeValue];
+  DistanceConstraintMode get mode =>
+      enumAt(DistanceConstraintMode.values, modeValue);
   set mode(DistanceConstraintMode value) => modeValue = value.index;
 }

lib/src/rive_core/constraints/targeted_constraint.dart

@@ -40,5 +40,4 @@ abstract class TargetedConstraint extends TargetedConstraintBase {
     super.onAddedDirty();
     target = context.resolve(targetId);
   }
-
 }

lib/src/rive_core/constraints/transform_space_constraint.dart

@@ -1,4 +1,5 @@
 import 'package:rive/src/generated/constraints/transform_space_constraint_base.dart';
+import 'package:rive/src/rive_core/enum_helper.dart';
 import 'package:rive/src/rive_core/transform_space.dart';
 import 'package:rive_common/math.dart';
 
@@ -8,7 +9,7 @@ abstract class TransformSpaceConstraint extends TransformSpaceConstraintBase {
   final TransformComponents componentsA = TransformComponents();
   final TransformComponents componentsB = TransformComponents();
 
-  TransformSpace get destSpace => TransformSpace.values[destSpaceValue];
+  TransformSpace get destSpace => enumAt(TransformSpace.values, destSpaceValue);
   set destSpace(TransformSpace value) => destSpaceValue = value.index;
 
   TransformSpace get sourceSpace => TransformSpace.values[sourceSpaceValue];

lib/src/rive_core/draw_target.dart

@@ -1,6 +1,7 @@
 import 'package:rive/src/core/core.dart';
 import 'package:rive/src/generated/draw_target_base.dart';
 import 'package:rive/src/rive_core/drawable.dart';
+import 'package:rive/src/rive_core/enum_helper.dart';
 
 export 'package:rive/src/generated/draw_target_base.dart';
 
@@ -23,7 +24,7 @@ class DrawTarget extends DrawTargetBase {
   }
 
   DrawTargetPlacement get placement =>
-      DrawTargetPlacement.values[placementValue];
+      enumAt(DrawTargetPlacement.values, placementValue);
   set placement(DrawTargetPlacement value) => placementValue = value.index;
 
   @override

lib/src/rive_core/enum_helper.dart

@@ -0,0 +1,3 @@
+/// Helper for getting a valid enum at an index (or default to the first one).
+T enumAt<T>(List<T> values, int index) =>
+    index < values.length ? values[index] : values.first;

lib/src/rive_core/nested_animation.dart

@@ -12,7 +12,6 @@ abstract class NestedAnimation<T extends Animation>
   @override
   void animationIdChanged(int from, int to) {}
 
-
   bool get isEnabled;
 
   /// Returns true when the NestedAnimation needs to keep advancing. Returning

lib/src/rive_core/nested_artboard.dart

@@ -64,7 +64,6 @@ class NestedArtboard extends NestedArtboardBase {
   @override
   void artboardIdChanged(int from, int to) {}
 
-
   @override
   void childAdded(Component child) {
     super.childAdded(child);

lib/src/rive_core/shapes/clipping_shape.dart

@@ -2,6 +2,7 @@ import 'dart:ui';
 
 import 'package:rive/src/generated/shapes/clipping_shape_base.dart';
 import 'package:rive/src/rive_core/component_dirt.dart';
+import 'package:rive/src/rive_core/enum_helper.dart';
 import 'package:rive/src/rive_core/node.dart';
 import 'package:rive/src/rive_core/shapes/shape.dart';
 
@@ -10,7 +11,7 @@ export 'package:rive/src/generated/shapes/clipping_shape_base.dart';
 class ClippingShape extends ClippingShapeBase {
   final Path clippingPath = Path();
   final List<Shape> _shapes = [];
-  PathFillType get fillType => PathFillType.values[fillRule];
+  PathFillType get fillType => enumAt(PathFillType.values, fillRule);
   set fillType(PathFillType type) => fillRule = type.index;
 
   Node _source = Node.unknown;

lib/src/rive_core/shapes/image.dart

@@ -91,7 +91,6 @@ class Image extends ImageBase
     }
   }
 
-
   @override
   int get assetIdPropertyKey => ImageBase.assetIdPropertyKey;
 

lib/src/rive_core/shapes/paint/stroke.dart

@@ -1,6 +1,7 @@
 import 'package:flutter/material.dart';
 import 'package:rive/src/generated/shapes/paint/stroke_base.dart';
 import 'package:rive/src/rive_core/component_dirt.dart';
+import 'package:rive/src/rive_core/enum_helper.dart';
 import 'package:rive/src/rive_core/shapes/paint/stroke_effect.dart';
 import 'package:rive/src/rive_core/shapes/shape.dart';
 import 'package:rive/src/rive_core/shapes/shape_paint_container.dart';
@@ -31,21 +32,21 @@ class Stroke extends StrokeBase {
     ..strokeJoin = strokeJoin
     ..strokeWidth = thickness;
 
-  StrokeCap get strokeCap => StrokeCap.values[cap];
+  StrokeCap get strokeCap => enumAt(StrokeCap.values, cap);
   set strokeCap(StrokeCap value) => cap = value.index;
 
-  StrokeJoin get strokeJoin => StrokeJoin.values[join];
+  StrokeJoin get strokeJoin => enumAt(StrokeJoin.values, join);
   set strokeJoin(StrokeJoin value) => join = value.index;
 
   @override
   void capChanged(int from, int to) {
-    paint.strokeCap = StrokeCap.values[to];
+    paint.strokeCap = enumAt(StrokeCap.values, to);
     parent?.addDirt(ComponentDirt.paint);
   }
 
   @override
   void joinChanged(int from, int to) {
-    paint.strokeJoin = StrokeJoin.values[to];
+    paint.strokeJoin = enumAt(StrokeJoin.values, to);
     parent?.addDirt(ComponentDirt.paint);
   }
 

lib/src/rive_core/text/text.dart

@@ -4,6 +4,7 @@ import 'dart:ui';
 
 import 'package:rive/src/generated/text/text_base.dart';
 import 'package:rive/src/rive_core/component_dirt.dart';
+import 'package:rive/src/rive_core/enum_helper.dart';
 import 'package:rive/src/rive_core/text/styled_text.dart';
 import 'package:rive/src/rive_core/text/text_modifier_group.dart';
 import 'package:rive/src/rive_core/text/text_style.dart' as rive;
@@ -170,7 +171,6 @@ class Text extends TextBase with TextStyleContainer {
     _syncRuns();
   }
 
-
   Mat2D get originTransform => Mat2D.multiply(
         Mat2D(),
         worldTransform,
@@ -575,7 +575,7 @@ class Text extends TextBase with TextStyleContainer {
     markShapeDirty();
   }
 
-  TextAlign get align => TextAlign.values[alignValue];
+  TextAlign get align => enumAt(TextAlign.values, alignValue);
   set align(TextAlign value) => alignValue = value.index;
 
   @override
@@ -588,7 +588,7 @@ class Text extends TextBase with TextStyleContainer {
   TextSizing get sizing => TextSizing.values[sizingValue];
   set sizing(TextSizing value) => sizingValue = value.index;
   TextOverflow get overflow {
-    return TextOverflow.values[overflowValue];
+    return enumAt(TextOverflow.values, overflowValue);
   }
 
   set overflow(TextOverflow value) => overflowValue = value.index;

lib/src/rive_core/text/text_modifier_range.dart

@@ -7,6 +7,7 @@ import 'package:rive/src/rive_core/animation/cubic_interpolator_component.dart';
 import 'package:rive/src/rive_core/animation/interpolator.dart';
 import 'package:rive/src/rive_core/component.dart';
 import 'package:rive/src/rive_core/component_dirt.dart';
+import 'package:rive/src/rive_core/enum_helper.dart';
 import 'package:rive/src/rive_core/text/text_modifier_group.dart';
 import 'package:rive/src/rive_core/text/text_value_run.dart';
 import 'package:rive_common/rive_text.dart';
@@ -236,7 +237,7 @@ class TextModifierRange extends TextModifierRangeBase {
     }
   }
 
-  TextRangeUnits get units => TextRangeUnits.values[unitsValue];
+  TextRangeUnits get units => enumAt(TextRangeUnits.values, unitsValue);
   set units(TextRangeUnits units) => unitsValue = units.index;
 
   @override
@@ -248,7 +249,7 @@ class TextModifierRange extends TextModifierRangeBase {
   @override
   void modeValueChanged(int from, int to) => modifierGroup?.rangeChanged();
 
-  TextRangeType get type => TextRangeType.values[typeValue];
+  TextRangeType get type => enumAt(TextRangeType.values, typeValue);
   set type(TextRangeType value) => typeValue = value.index;
 
   @override

lib/src/rive_core/text/text_style.dart

@@ -166,7 +166,6 @@ class TextStyle extends TextStyleBase
     _variationHelper?.addDirt(ComponentDirt.textShape);
   }
 
-
   @override
   void onDirty(int mask) {
     super.onDirty(mask);

pubspec.yaml

@@ -1,5 +1,5 @@
 name: rive
-version: 0.12.0
+version: 0.12.1
 homepage: https://rive.app
 description: Rive 2 Flutter Runtime. This package provides runtime functionality for playing back and interacting with animations built with the Rive editor available at https://rive.app.
 repository: https://github.com/rive-app/rive-flutter
@@ -18,7 +18,7 @@ dependencies:
     sdk: flutter
   flutter_web_plugins:
     sdk: flutter
-  http: ">=0.13.3 <2.0.0"
+  http: '>=0.13.3 <2.0.0'
   meta: ^1.3.0
   plugin_platform_interface: ^2.0.2
   rive_common: 0.2.7