Enable use_if_null_to_convert_nulls_to_bools lint (#98753)

analysis_options.yaml

@@ -235,7 +235,7 @@ linter:
     # - use_decorated_box # not yet tested
     - use_full_hex_values_for_flutter_colors
     - use_function_type_syntax_for_parameters
-    # - use_if_null_to_convert_nulls_to_bools # blocked on https://github.com/dart-lang/sdk/issues/47436
+    - use_if_null_to_convert_nulls_to_bools
     - use_is_even_rather_than_modulo
     - use_key_in_widget_constructors
     - use_late_for_private_fields_and_variables

dev/benchmarks/complex_layout/test/measure_scroll_smoothness.dart

@@ -136,7 +136,7 @@ Future<void> main() async {
     final List<double> scrollOffset = <double>[];
     final List<Duration> delays = <Duration>[];
     binding.addPersistentFrameCallback((Duration timeStamp) {
-      if (controller?.hasClients == true) {
+      if (controller?.hasClients ?? false) {
         // This if is necessary because by the end of the test the widget tree
         // is destroyed.
         frameTimestamp.add(timeStamp.inMicroseconds);

dev/devicelab/lib/framework/browser.dart

@@ -93,7 +93,7 @@ class Chrome {
         options.url!,
       if (io.Platform.environment['CHROME_NO_SANDBOX'] == 'true')
         '--no-sandbox',
-      if (options.headless == true)
+      if (options.headless ?? false)
         '--headless',
       if (withDebugging)
         '--remote-debugging-port=${options.debugPort}',

dev/integration_tests/android_views/lib/motion_events_page.dart

@@ -171,7 +171,7 @@ class MotionEventsBodyState extends State<MotionEventsBody> {
   }
 
   Future<void> saveRecordedEvents(ByteData data, BuildContext context) async {
-    if (await channel.invokeMethod<bool>('getStoragePermission') == true) {
+    if (await channel.invokeMethod<bool>('getStoragePermission') ?? false) {
       showMessage(
           context, 'External storage permissions are required to save events');
       return;

dev/integration_tests/flutter_gallery/lib/demo/material/leave_behind_demo.dart

@@ -230,9 +230,9 @@ class _LeaveBehindListItem extends StatelessWidget {
         confirmDismiss: !confirmDismiss ? null : (DismissDirection dismissDirection) async {
           switch(dismissDirection) {
             case DismissDirection.endToStart:
-              return await _showConfirmationDialog(context, 'archive') == true;
+              return await _showConfirmationDialog(context, 'archive') ?? false;
             case DismissDirection.startToEnd:
-              return await _showConfirmationDialog(context, 'delete') == true;
+              return await _showConfirmationDialog(context, 'delete') ?? false;
             case DismissDirection.horizontal:
             case DismissDirection.vertical:
             case DismissDirection.up:

dev/manual_tests/lib/density.dart

@@ -322,14 +322,14 @@ class _OptionsState extends State<Options> {
                   LabeledCheckbox(
                     label: 'Enabled',
                     onChanged: (bool? checked) {
-                      widget.model.enable = checked == true;
+                      widget.model.enable = checked ?? false;
                     },
                     value: widget.model.enable,
                   ),
                   LabeledCheckbox(
                     label: 'Slow',
                     onChanged: (bool? checked) {
-                      widget.model.slowAnimations = checked == true;
+                      widget.model.slowAnimations = checked ?? false;
                       Future<void>.delayed(const Duration(milliseconds: 150)).then((_) {
                         if (widget.model.slowAnimations) {
                           timeDilation = 20.0;
@@ -343,7 +343,7 @@ class _OptionsState extends State<Options> {
                   LabeledCheckbox(
                     label: 'RTL',
                     onChanged: (bool? checked) {
-                      widget.model.rtl = checked == true;
+                      widget.model.rtl = checked ?? false;
                     },
                     value: widget.model.rtl,
                   ),
@@ -566,7 +566,7 @@ class _MyHomePageState extends State<MyHomePage> {
               onChanged: _model.enable
                   ? (bool? value) {
                       setState(() {
-                        checkboxValues[index] = value == true;
+                        checkboxValues[index] = value ?? false;
                       });
                     }
                   : null,

dev/manual_tests/lib/text.dart

@@ -337,7 +337,7 @@ class _FuzzerState extends State<Fuzzer> with SingleTickerProviderStateMixin {
   }
 
   int depthOf(TextSpan node) {
-    if (node.children == null || node.children?.isEmpty == true)
+    if (node.children == null || (node.children?.isEmpty ?? false))
       return 0;
     int result = 0;
     for (final TextSpan child in node.children!.cast<TextSpan>())

packages/flutter/lib/src/cupertino/date_picker.dart

@@ -673,8 +673,8 @@ class _CupertinoDatePickerDateTimeState extends State<CupertinoDatePicker> {
   void _onSelectedItemChange(int index) {
     final DateTime selected = selectedDateTime;
 
-    final bool isDateInvalid = widget.minimumDate?.isAfter(selected) == true
+    final bool isDateInvalid = (widget.minimumDate?.isAfter(selected) ?? false)
-                            || widget.maximumDate?.isBefore(selected) == true;
+        || (widget.maximumDate?.isBefore(selected) ?? false);
 
     if (isDateInvalid)
       return;

packages/flutter/lib/src/cupertino/nav_bar.dart

@@ -1330,7 +1330,7 @@ class CupertinoNavigationBarBackButton extends StatelessWidget {
     final ModalRoute<dynamic>? currentRoute = ModalRoute.of(context);
     if (onPressed == null) {
       assert(
-        currentRoute?.canPop == true,
+        currentRoute?.canPop ?? false,
         'CupertinoNavigationBarBackButton should only be used in routes that can be popped',
       );
     }

packages/flutter/lib/src/cupertino/text_field.dart

@@ -1010,7 +1010,7 @@ class _CupertinoTextFieldState extends State<CupertinoTextField> with Restoratio
   }
 
   @override
-  bool get wantKeepAlive => _controller?.value.text.isNotEmpty == true;
+  bool get wantKeepAlive => _controller?.value.text.isNotEmpty ?? false;
 
   bool _shouldShowAttachment({
     required OverlayVisibilityMode attachment,

packages/flutter/lib/src/foundation/diagnostics.dart

@@ -1617,7 +1617,7 @@ abstract class DiagnosticsNode {
           'allowTruncate': allowTruncate,
         if (hasChildren)
           'hasChildren': hasChildren,
-        if (linePrefix?.isNotEmpty == true)
+        if (linePrefix?.isNotEmpty ?? false)
           'linePrefix': linePrefix,
         if (!allowWrap)
           'allowWrap': allowWrap,
@@ -2209,7 +2209,7 @@ class FlagProperty extends DiagnosticsProperty<bool> {
 
   @override
   String valueToString({ TextTreeConfiguration? parentConfiguration }) {
-    if (value == true) {
+    if (value ?? false) {
       if (ifTrue != null)
         return ifTrue!;
     } else if (value == false) {
@@ -2221,7 +2221,7 @@ class FlagProperty extends DiagnosticsProperty<bool> {
 
   @override
   bool get showName {
-    if (value == null || (value == true && ifTrue == null) || (value == false && ifFalse == null)) {
+    if (value == null || ((value ?? false) && ifTrue == null) || (!(value ?? true) && ifFalse == null)) {
       // We are missing a description for the flag value so we need to show the
       // flag name. The property will have DiagnosticLevel.hidden for this case
       // so users will not see this the property in this case unless they are
@@ -2233,7 +2233,7 @@ class FlagProperty extends DiagnosticsProperty<bool> {
 
   @override
   DiagnosticLevel get level {
-    if (value == true) {
+    if (value ?? false) {
       if (ifTrue == null)
         return DiagnosticLevel.hidden;
     }

packages/flutter/lib/src/gestures/recognizer.dart

@@ -191,7 +191,7 @@ abstract class GestureRecognizer extends GestureArenaMember with DiagnosticableT
           // The 19 in the line below is the width of the prefix used by
           // _debugLogDiagnostic in arena.dart.
           final String prefix = debugPrintGestureArenaDiagnostics ? '${' ' * 19}❙ ' : '';
-          debugPrint('$prefix$this calling $name callback.${ report?.isNotEmpty == true ? " $report" : "" }');
+          debugPrint('$prefix$this calling $name callback.${ (report?.isNotEmpty ?? false) ? " $report" : "" }');
         }
         return true;
       }());

packages/flutter/lib/src/material/checkbox.dart

@@ -468,7 +468,7 @@ class _CheckboxState extends State<Checkbox> with TickerProviderStateMixin, Togg
       ?? const Color(0xFFFFFFFF);
 
     return Semantics(
-      checked: widget.value == true,
+      checked: widget.value ?? false,
       child: buildToggleable(
         mouseCursor: effectiveMouseCursor,
         focusNode: widget.focusNode,
@@ -660,13 +660,13 @@ class _CheckboxPainter extends ToggleablePainter {
       _drawBox(canvas, outer, paint, side, true);
       if (tNormalized <= 0.5) {
         final double tShrink = 1.0 - tNormalized * 2.0;
-        if (previousValue == true)
+        if (previousValue ?? false)
           _drawCheck(canvas, origin, tShrink, strokePaint);
         else
           _drawDash(canvas, origin, tShrink, strokePaint);
       } else {
         final double tExpand = (tNormalized - 0.5) * 2.0;
-        if (value == true)
+        if (value ?? false)
           _drawCheck(canvas, origin, tExpand, strokePaint);
         else
           _drawDash(canvas, origin, tExpand, strokePaint);

packages/flutter/lib/src/material/input_decorator.dart

@@ -2095,7 +2095,7 @@ class _InputDecoratorState extends State<InputDecorator> with TickerProviderStat
         ? _getDefaultBorderColor(themeData)
         : themeData.errorColor;
     } else {
-      borderColor = (decoration!.filled == true && decoration!.border?.isOutline != true)
+      borderColor = ((decoration!.filled ?? false) && !(decoration!.border?.isOutline ?? false))
         ? Colors.transparent
         : themeData.disabledColor;
     }
@@ -2188,7 +2188,7 @@ class _InputDecoratorState extends State<InputDecorator> with TickerProviderStat
       );
 
 
-    final bool decorationIsDense = decoration!.isDense == true; // isDense == null, same as false
+    final bool decorationIsDense = decoration!.isDense ?? false;
     final double iconSize = decorationIsDense ? 18.0 : 24.0;
 
     final Widget? icon = decoration!.icon == null ? null :
@@ -2284,7 +2284,7 @@ class _InputDecoratorState extends State<InputDecorator> with TickerProviderStat
     } else if (!border.isOutline) {
       // 4.0: the vertical gap between the inline elements and the floating label.
       floatingLabelHeight = (4.0 + 0.75 * labelStyle.fontSize!) * MediaQuery.textScaleFactorOf(context);
-      if (decoration!.filled == true) { // filled == null same as filled == false
+      if (decoration!.filled ?? false) {
         contentPadding = decorationContentPadding ?? (decorationIsDense
           ? const EdgeInsets.fromLTRB(12.0, 8.0, 12.0, 8.0)
           : const EdgeInsets.fromLTRB(12.0, 12.0, 12.0, 12.0));
@@ -3656,7 +3656,7 @@ class InputDecoration {
       if (counter != null) 'counter: $counter',
       if (counterText != null) 'counterText: $counterText',
       if (counterStyle != null) 'counterStyle: $counterStyle',
-      if (filled == true) 'filled: true', // filled == null same as filled == false
+      if (filled ?? false) 'filled: true',
       if (fillColor != null) 'fillColor: $fillColor',
       if (focusColor != null) 'focusColor: $focusColor',
       if (hoverColor != null) 'hoverColor: $hoverColor',

packages/flutter/lib/src/material/scaffold.dart

@@ -193,7 +193,7 @@ class ScaffoldMessengerState extends State<ScaffoldMessenger> with TickerProvide
     // and there is a SnackBar that would have timed out that has already
     // completed its timer, dismiss that SnackBar. If the timer hasn't finished
     // yet, let it timeout as normal.
-    if (_accessibleNavigation == true
+    if ((_accessibleNavigation ?? false)
         && !mediaQuery.accessibleNavigation
         && _snackBarTimer != null
         && !_snackBarTimer!.isActive) {
@@ -2628,7 +2628,7 @@ class ScaffoldState extends State<Scaffold> with TickerProviderStateMixin, Resto
     }
     if (widget.bottomSheet != oldWidget.bottomSheet) {
       assert(() {
-        if (widget.bottomSheet != null && _currentBottomSheet?._isLocalHistoryEntry == true) {
+        if (widget.bottomSheet != null && (_currentBottomSheet?._isLocalHistoryEntry ?? false)) {
           throw FlutterError.fromParts(<DiagnosticsNode>[
             ErrorSummary(
               'Scaffold.bottomSheet cannot be specified while a bottom sheet displayed '
@@ -2673,7 +2673,7 @@ class ScaffoldState extends State<Scaffold> with TickerProviderStateMixin, Resto
     // and there is a SnackBar that would have timed out that has already
     // completed its timer, dismiss that SnackBar. If the timer hasn't finished
     // yet, let it timeout as normal.
-    if (_accessibleNavigation == true
+    if ((_accessibleNavigation ?? false)
       && !mediaQuery.accessibleNavigation
       && _snackBarTimer != null
       && !_snackBarTimer!.isActive) {

packages/flutter/lib/src/material/slider_theme.dart

@@ -2458,7 +2458,7 @@ class RoundRangeSliderThumbShape extends RangeSliderThumbShape {
 
     // Add a stroke of 1dp around the circle if this thumb would overlap
     // the other thumb.
-    if (isOnTop == true) {
+    if (isOnTop ?? false) {
       final Paint strokePaint = Paint()
         ..color = sliderTheme.overlappingShapeStrokeColor!
         ..strokeWidth = 1.0

packages/flutter/lib/src/material/toggleable.dart

@@ -185,12 +185,12 @@ mixin ToggleableStateMixin<S extends StatefulWidget> on TickerProviderStateMixin
     if (tristate) {
       if (value == null)
         _positionController.value = 0.0;
-      if (value != false)
+      if (value ?? true)
         _positionController.forward();
       else
         _positionController.reverse();
     } else {
-      if (value == true)
+      if (value ?? false)
         _positionController.forward();
       else
         _positionController.reverse();
@@ -282,7 +282,7 @@ mixin ToggleableStateMixin<S extends StatefulWidget> on TickerProviderStateMixin
     if (!isInteractive) MaterialState.disabled,
     if (_hovering) MaterialState.hovered,
     if (_focused) MaterialState.focused,
-    if (value != false) MaterialState.selected,
+    if (value ?? true) MaterialState.selected,
   };
 
   /// Typically wraps a `painter` that draws the actual visuals of the

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

@@ -1331,7 +1331,7 @@ class RenderEditable extends RenderBox with RelayoutWhenSystemFontsChangeMixin,
     if (hasFocus && !readOnly)
       config.onSetText = _handleSetText;
 
-    if (selectionEnabled && selection?.isValid == true) {
+    if (selectionEnabled && (selection?.isValid ?? false)) {
       config.textSelection = selection;
       if (_textPainter.getOffsetBefore(selection!.extentOffset) != null) {
         config
@@ -1447,7 +1447,7 @@ class RenderEditable extends RenderBox with RelayoutWhenSystemFontsChangeMixin,
             assert(false, '${recognizer.runtimeType} is not supported.');
           }
         }
-        final SemanticsNode newChild = (_cachedChildNodes?.isNotEmpty == true)
+        final SemanticsNode newChild = (_cachedChildNodes?.isNotEmpty ?? false)
             ? _cachedChildNodes!.removeFirst()
             : SemanticsNode();
         newChild

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

@@ -2719,7 +2719,7 @@ abstract class RenderObject extends AbstractNode with DiagnosticableTreeMixin im
     // RenderObject are still up-to date. Therefore, we will later only rebuild
     // the semantics subtree starting at the identified semantics boundary.
 
-    final bool wasSemanticsBoundary = _semantics != null && _cachedSemanticsConfiguration?.isSemanticBoundary == true;
+    final bool wasSemanticsBoundary = _semantics != null && (_cachedSemanticsConfiguration?.isSemanticBoundary ?? false);
     _cachedSemanticsConfiguration = null;
     bool isEffectiveSemanticsBoundary = _semanticsConfiguration.isSemanticBoundary && wasSemanticsBoundary;
     RenderObject node = this;
@@ -3021,7 +3021,7 @@ abstract class RenderObject extends AbstractNode with DiagnosticableTreeMixin im
     super.debugFillProperties(properties);
     properties.add(FlagProperty('needsCompositing', value: _needsCompositing, ifTrue: 'needs compositing'));
     properties.add(DiagnosticsProperty<Object?>('creator', debugCreator, defaultValue: null, level: DiagnosticLevel.debug));
-    properties.add(DiagnosticsProperty<ParentData>('parentData', parentData, tooltip: _debugCanParentUseSize == true ? 'can use size' : null, missingIfNull: true));
+    properties.add(DiagnosticsProperty<ParentData>('parentData', parentData, tooltip: (_debugCanParentUseSize ?? false) ? 'can use size' : null, missingIfNull: true));
     properties.add(DiagnosticsProperty<Constraints>('constraints', _constraints, missingIfNull: true));
     // don't access it via the "layer" getter since that's only valid when we don't need paint
     properties.add(DiagnosticsProperty<ContainerLayer>('layer', _layerHandle.layer, defaultValue: null));
@@ -3804,7 +3804,7 @@ class _SwitchableSemanticsFragment extends _InterestingSemanticsFragment {
         ? _SemanticsGeometry(parentSemanticsClipRect: parentSemanticsClipRect, parentPaintClipRect: parentPaintClipRect, ancestors: _ancestorChain)
         : null;
 
-    if (!_mergeIntoParent && (geometry?.dropFromTree == true))
+    if (!_mergeIntoParent && (geometry?.dropFromTree ?? false))
       return;  // Drop the node, it's not going to be visible.
 
     owner._semantics ??= SemanticsNode(showOnScreen: owner.showOnScreen);

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

@@ -1004,7 +1004,7 @@ class RenderParagraph extends RenderBox
             assert(false, '${recognizer.runtimeType} is not supported.');
           }
         }
-        final SemanticsNode newChild = (_cachedChildNodes?.isNotEmpty == true)
+        final SemanticsNode newChild = (_cachedChildNodes?.isNotEmpty ?? false)
             ? _cachedChildNodes!.removeFirst()
             : SemanticsNode();
         newChild

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

@@ -2701,7 +2701,7 @@ class RenderFittedBox extends RenderProxyBox {
 
   @override
   bool hitTestChildren(BoxHitTestResult result, { required Offset position }) {
-    if (size.isEmpty || child?.size.isEmpty == true)
+    if (size.isEmpty || (child?.size.isEmpty ?? false))
       return false;
     _updatePaintData();
     return result.addWithPaintTransform(
@@ -4751,11 +4751,11 @@ class RenderSemanticsAnnotations extends RenderProxyBox {
     config.isSemanticBoundary = container;
     config.explicitChildNodes = explicitChildNodes;
     assert(
-      (scopesRoute == true && explicitChildNodes == true) || scopesRoute != true,
+      ((scopesRoute ?? false) && explicitChildNodes) || !(scopesRoute ?? false),
       'explicitChildNodes must be set to true if scopes route is true',
     );
     assert(
-      !(toggled == true && checked == true),
+      !((toggled ?? false) && (checked ?? false)),
       'A semantics node cannot be toggled and checked at the same time',
     );
 

packages/flutter/lib/src/semantics/semantics.dart

@@ -601,7 +601,7 @@ class SemanticsData with Diagnosticable {
     properties.add(AttributedStringProperty('decreasedValue', attributedDecreasedValue));
     properties.add(AttributedStringProperty('hint', attributedHint));
     properties.add(EnumProperty<TextDirection>('textDirection', textDirection, defaultValue: null));
-    if (textSelection?.isValid == true)
+    if (textSelection?.isValid ?? false)
       properties.add(MessageProperty('textSelection', '[${textSelection!.start}, ${textSelection!.end}]'));
     properties.add(IntProperty('platformViewId', platformViewId, defaultValue: null));
     properties.add(IntProperty('maxValueLength', maxValueLength, defaultValue: null));
@@ -2456,7 +2456,7 @@ class SemanticsNode extends AbstractNode with DiagnosticableTreeMixin {
       }
     }
     Int32List? customSemanticsActionIds;
-    if (data.customSemanticsActionIds?.isNotEmpty == true) {
+    if (data.customSemanticsActionIds?.isNotEmpty ?? false) {
       customSemanticsActionIds = Int32List(data.customSemanticsActionIds!.length);
       for (int i = 0; i < data.customSemanticsActionIds!.length; i++) {
         customSemanticsActionIds[i] = data.customSemanticsActionIds![i];
@@ -2618,7 +2618,7 @@ class SemanticsNode extends AbstractNode with DiagnosticableTreeMixin {
     properties.add(AttributedStringProperty('hint', _attributedHint));
     properties.add(EnumProperty<TextDirection>('textDirection', _textDirection, defaultValue: null));
     properties.add(DiagnosticsProperty<SemanticsSortKey>('sortKey', sortKey, defaultValue: null));
-    if (_textSelection?.isValid == true)
+    if (_textSelection?.isValid ?? false)
       properties.add(MessageProperty('text selection', '[${_textSelection!.start}, ${_textSelection!.end}]'));
     properties.add(IntProperty('platformViewId', platformViewId, defaultValue: null));
     properties.add(IntProperty('maxValueLength', maxValueLength, defaultValue: null));

packages/flutter/lib/src/services/restoration.dart

@@ -895,7 +895,7 @@ class RestorationBucket {
       return;
     }
     _childrenToAdd[child.restorationId]?.remove(child);
-    if (_childrenToAdd[child.restorationId]?.isEmpty == true) {
+    if (_childrenToAdd[child.restorationId]?.isEmpty ?? false) {
       _childrenToAdd.remove(child.restorationId);
     }
   }

packages/flutter/lib/src/widgets/app.dart

@@ -1333,7 +1333,10 @@ class _WidgetsAppState extends State<WidgetsApp> with WidgetsBindingObserver {
   }
 
   bool get _usesRouter => widget.routerDelegate != null;
-  bool get _usesNavigator => widget.home != null || widget.routes?.isNotEmpty == true || widget.onGenerateRoute != null || widget.onUnknownRoute != null;
+  bool get _usesNavigator => widget.home != null
+      || (widget.routes?.isNotEmpty ?? false)
+      || widget.onGenerateRoute != null
+      || widget.onUnknownRoute != null;
 
   // ROUTER
 

packages/flutter/lib/src/widgets/dismissible.dart

@@ -322,7 +322,7 @@ class _DismissibleState extends State<Dismissible> with TickerProviderStateMixin
   bool _dismissThresholdReached = false;
 
   @override
-  bool get wantKeepAlive => _moveController?.isAnimating == true || _resizeController?.isAnimating == true;
+  bool get wantKeepAlive => (_moveController?.isAnimating ?? false) || (_resizeController?.isAnimating ?? false);
 
   @override
   void dispose() {

packages/flutter/lib/src/widgets/editable_text.dart

@@ -1846,7 +1846,7 @@ class EditableTextState extends State<EditableText> with AutomaticKeepAliveClien
         );
       }
     }
-    if (widget.selectionEnabled && pasteEnabled && widget.selectionControls?.canPaste(this) == true) {
+    if (widget.selectionEnabled && pasteEnabled && (widget.selectionControls?.canPaste(this) ?? false)) {
       _clipboardStatus?.update();
     }
   }
@@ -3006,19 +3006,29 @@ class EditableTextState extends State<EditableText> with AutomaticKeepAliveClien
   }
 
   VoidCallback? _semanticsOnCopy(TextSelectionControls? controls) {
-    return widget.selectionEnabled && copyEnabled && _hasFocus && controls?.canCopy(this) == true
+    return widget.selectionEnabled
+        && copyEnabled
+        && _hasFocus
+        && (controls?.canCopy(this) ?? false)
       ? () => controls!.handleCopy(this, _clipboardStatus)
       : null;
   }
 
   VoidCallback? _semanticsOnCut(TextSelectionControls? controls) {
-    return widget.selectionEnabled && cutEnabled && _hasFocus && controls?.canCut(this) == true
+    return widget.selectionEnabled
+        && cutEnabled
+        && _hasFocus
+        && (controls?.canCut(this) ?? false)
       ? () => controls!.handleCut(this, _clipboardStatus)
       : null;
   }
 
   VoidCallback? _semanticsOnPaste(TextSelectionControls? controls) {
-    return widget.selectionEnabled && pasteEnabled && _hasFocus && controls?.canPaste(this) == true && (_clipboardStatus == null || _clipboardStatus!.value == ClipboardStatus.pasteable)
+    return widget.selectionEnabled
+        && pasteEnabled
+        && _hasFocus
+        && (controls?.canPaste(this) ?? false)
+        && (_clipboardStatus == null || _clipboardStatus!.value == ClipboardStatus.pasteable)
       ? () => controls!.handlePaste(this)
       : null;
   }

packages/flutter/lib/src/widgets/heroes.dart

@@ -800,7 +800,7 @@ class HeroController extends NavigatorObserver {
   @override
   void didReplace({ Route<dynamic>? newRoute, Route<dynamic>? oldRoute }) {
     assert(navigator != null);
-    if (newRoute?.isCurrent == true) {
+    if (newRoute?.isCurrent ?? false) {
       // Only run hero animations if the top-most route got replaced.
       _maybeStartHeroTransition(oldRoute, newRoute, HeroFlightDirection.push, false);
     }

packages/flutter/lib/src/widgets/navigator.dart

@@ -215,7 +215,7 @@ abstract class Route<T> {
   @mustCallSuper
   TickerFuture didPush() {
     return TickerFuture.complete()..then<void>((void _) {
-      if (navigator?.widget.requestFocus == true) {
+      if (navigator?.widget.requestFocus ?? false) {
         navigator!.focusScopeNode.requestFocus();
       }
     });
@@ -231,7 +231,7 @@ abstract class Route<T> {
   @protected
   @mustCallSuper
   void didAdd() {
-    if (navigator?.widget.requestFocus == true) {
+    if (navigator?.widget.requestFocus ?? false) {
       // This TickerFuture serves two purposes. First, we want to make sure
       // that animations triggered by other operations will finish before focusing the
       // navigator. Second, navigator.focusScopeNode might acquire more focused
@@ -514,7 +514,7 @@ abstract class Route<T> {
     return _navigator!._history.cast<_RouteEntry?>().firstWhere(
       (_RouteEntry? e) => e != null && _RouteEntry.isRoutePredicate(this)(e),
       orElse: () => null,
-    )?.isPresent == true;
+    )?.isPresent ?? false;
   }
 }
 
@@ -5359,7 +5359,7 @@ class _HistoryProperty extends RestorableProperty<Map<String?, List<Object>>?> {
       }
 
       assert(!entry.hasPage);
-      restorationEnabled = restorationEnabled && entry.restorationInformation?.isRestorable == true;
+      restorationEnabled = restorationEnabled && (entry.restorationInformation?.isRestorable ?? false);
       entry.restorationEnabled = restorationEnabled;
       if (restorationEnabled) {
         assert(entry.restorationId != null);

packages/flutter/lib/src/widgets/restoration.dart

@@ -747,7 +747,7 @@ mixin RestorationMixin<S extends StatefulWidget> on State<S> {
     assert(_debugDoingRestore || !_properties.keys.map((RestorableProperty<Object?> r) => r._restorationId).contains(restorationId),
            '"$restorationId" is already registered to another property.',
     );
-    final bool hasSerializedValue = bucket?.contains(restorationId) == true;
+    final bool hasSerializedValue = bucket?.contains(restorationId) ?? false;
     final Object? initialValue = hasSerializedValue
         ? property.fromPrimitives(bucket!.read<Object>(restorationId))
         : property.createDefaultValue();
@@ -850,7 +850,7 @@ mixin RestorationMixin<S extends StatefulWidget> on State<S> {
       return false;
     }
     final RestorationBucket? potentialNewParent = RestorationScope.of(context);
-    return potentialNewParent != _currentParent && potentialNewParent?.isReplacing == true;
+    return potentialNewParent != _currentParent && (potentialNewParent?.isReplacing ?? false);
   }
 
   List<RestorableProperty<Object?>>? _debugPropertiesWaitingForReregistration;

packages/flutter/lib/src/widgets/scroll_view.dart

@@ -100,7 +100,7 @@ abstract class ScrollView extends StatelessWidget {
        assert(shrinkWrap != null),
        assert(dragStartBehavior != null),
        assert(clipBehavior != null),
-       assert(!(controller != null && primary == true),
+       assert(!(controller != null && (primary ?? false)),
            'Primary ScrollViews obtain their ScrollController via inheritance from a PrimaryScrollController widget. '
            'You cannot both set primary to true and pass an explicit controller.',
        ),
@@ -109,7 +109,7 @@ abstract class ScrollView extends StatelessWidget {
        assert(anchor >= 0.0 && anchor <= 1.0),
        assert(semanticChildCount == null || semanticChildCount >= 0),
        primary = primary ?? controller == null && identical(scrollDirection, Axis.vertical),
-       physics = physics ?? (primary == true || (primary == null && controller == null && identical(scrollDirection, Axis.vertical)) ? const AlwaysScrollableScrollPhysics() : null),
+       physics = physics ?? ((primary ?? false) || (primary == null && controller == null && identical(scrollDirection, Axis.vertical)) ? const AlwaysScrollableScrollPhysics() : null),
        super(key: key);
 
   /// {@template flutter.widgets.scroll_view.scrollDirection}

packages/flutter/lib/src/widgets/scrollbar.dart

@@ -902,7 +902,7 @@ class RawScrollbar extends StatefulWidget {
          'isAlwaysShown is deprecated.'
        ),
        assert(
-         !((thumbVisibility == false || isAlwaysShown == false) && trackVisibility == true),
+         !((thumbVisibility == false || isAlwaysShown == false) && (trackVisibility ?? false)),
          'A scrollbar track cannot be drawn without a scrollbar thumb.'
        ),
        assert(minThumbLength != null),
@@ -1533,7 +1533,7 @@ class RawScrollbarState<T extends RawScrollbar> extends State<T> with TickerProv
     super.didUpdateWidget(oldWidget);
     if (widget.isAlwaysShown != oldWidget.isAlwaysShown
         || widget.thumbVisibility != oldWidget.thumbVisibility) {
-      if (widget.isAlwaysShown == true || widget.thumbVisibility == true) {
+      if ((widget.isAlwaysShown ?? false) || (widget.thumbVisibility ?? false)) {
         assert(_debugScheduleCheckHasValidScrollPosition());
         _fadeoutTimer?.cancel();
         _fadeoutAnimationController.animateTo(1.0);

packages/flutter/lib/src/widgets/single_child_scroll_view.dart

@@ -153,7 +153,7 @@ class SingleChildScrollView extends StatelessWidget {
   }) : assert(scrollDirection != null),
        assert(dragStartBehavior != null),
        assert(clipBehavior != null),
-       assert(!(controller != null && primary == true),
+       assert(!(controller != null && (primary ?? false)),
           'Primary ScrollViews obtain their ScrollController via inheritance from a PrimaryScrollController widget. '
           'You cannot both set primary to true and pass an explicit controller.',
        ),

packages/flutter/lib/src/widgets/sliver_layout_builder.dart

@@ -67,7 +67,7 @@ class _RenderSliverLayoutBuilder extends RenderSliver with RenderObjectWithChild
   @override
   void paint(PaintingContext context, Offset offset) {
     // This renderObject does not introduce additional offset to child's position.
-    if (child?.geometry?.visible == true)
+    if (child?.geometry?.visible ?? false)
       context.paintChild(child!, offset);
   }
 

packages/flutter/lib/src/widgets/text_selection.dart

@@ -1056,7 +1056,7 @@ class _SelectionToolbarOverlayState extends State<_SelectionToolbarOverlay> with
   }
 
   void _toolbarVisibilityChanged() {
-    if (widget.visibility?.value != false) {
+    if (widget.visibility?.value ?? true) {
       _controller.forward();
     } else {
       _controller.reverse();
@@ -1139,7 +1139,7 @@ class _SelectionHandleOverlayState extends State<_SelectionHandleOverlay> with S
   }
 
   void _handleVisibilityChanged() {
-    if (widget.visibility?.value != false) {
+    if (widget.visibility?.value ?? true) {
       _controller.forward();
     } else {
       _controller.reverse();

packages/flutter/lib/src/widgets/widget_inspector.dart

@@ -2473,7 +2473,7 @@ class InspectorSelection {
 
   Element? _currentElement;
   set currentElement(Element? element) {
-    if (element?.debugIsDefunct == true) {
+    if (element?.debugIsDefunct ?? false) {
       _currentElement = null;
       _current = null;
       return;

packages/flutter/test/cupertino/text_field_test.dart

@@ -84,7 +84,7 @@ class PathBoundsMatcher extends Matcher {
     final Map<Matcher, dynamic> failedMatcher = <Matcher, dynamic> {};
 
     for(int idx = 0; idx < matchers.length; idx++) {
-      if (!(matchers[idx]?.matches(values[idx], matchState) != false)) {
+      if (!(matchers[idx]?.matches(values[idx], matchState) ?? true)) {
         failedMatcher[matchers[idx]!] = values[idx];
       }
     }

packages/flutter/test/material/paginated_data_table_test.dart

@@ -34,7 +34,7 @@ class TestDataSource extends DataTableSource {
   final Set<int> _selectedRows = <int>{};
 
   void _handleSelected(int index, bool? selected) {
-    if (selected == true) {
+    if (selected ?? false) {
       _selectedRows.add(index);
     } else {
       _selectedRows.remove(index);

packages/flutter/test/widgets/semantics_tester.dart

@@ -367,7 +367,7 @@ class TestSemantics {
       buf.writeln("$indent  hint: '$hint',");
     if (textDirection != null)
       buf.writeln('$indent  textDirection: $textDirection,');
-    if (textSelection?.isValid == true)
+    if (textSelection?.isValid ?? false)
       buf.writeln('$indent  textSelection:\n[${textSelection!.start}, ${textSelection!.end}],');
     if (scrollIndex != null)
       buf.writeln('$indent scrollIndex: $scrollIndex,');

packages/flutter_driver/lib/src/driver/vmservice_driver.dart

@@ -321,7 +321,7 @@ class VMServiceFlutterDriver extends FlutterDriver {
         stackTrace,
       );
     }
-    if ((response['isError'] as bool?) == true)
+    if ((response['isError'] as bool?) ?? false)
       throw DriverError('Error in Flutter application: ${response['response']}');
     return response['response'] as Map<String, dynamic>;
   }

packages/flutter_driver/lib/src/driver/web_driver.dart

@@ -151,7 +151,7 @@ class WebFlutterDriver extends FlutterDriver {
     final Object? responseData = response['response'];
     if (isError is! bool?) {
       throw _createMalformedExtensionResponseError(data);
-    } else if (isError == true) {
+    } else if (isError ?? false) {
       throw DriverError('Error in Flutter application: $responseData');
     }
 

packages/flutter_tools/lib/src/android/android_workflow.dart

@@ -63,7 +63,7 @@ class AndroidWorkflow implements Workflow {
   @override
   bool get canLaunchDevices => appliesToHostPlatform && _androidSdk != null
     && _androidSdk?.adbPath != null
-    && _androidSdk?.validateSdkWellFormed().isEmpty == true;
+    && (_androidSdk?.validateSdkWellFormed().isEmpty ?? false);
 
   @override
   bool get canListEmulators => canListDevices && _androidSdk?.emulatorPath != null;

packages/flutter_tools/lib/src/android/application_package.dart

@@ -232,7 +232,7 @@ class _Element extends _Entry {
 
   _Attribute? firstAttribute(String name) {
     for (final _Attribute child in children.whereType<_Attribute>()) {
-      if (child.key?.startsWith(name) == true) {
+      if (child.key?.startsWith(name) ?? false) {
         return child;
       }
     }
@@ -241,7 +241,7 @@ class _Element extends _Entry {
 
   _Element? firstElement(String name) {
     for (final _Element child in children.whereType<_Element>()) {
-      if (child.name?.startsWith(name) == true) {
+      if (child.name?.startsWith(name) ?? false) {
         return child;
       }
     }
@@ -249,7 +249,7 @@ class _Element extends _Entry {
   }
 
   Iterable<_Element> allElements(String name) {
-    return children.whereType<_Element>().where((_Element e) => e.name?.startsWith(name) == true);
+    return children.whereType<_Element>().where((_Element e) => e.name?.startsWith(name) ?? false);
   }
 }
 
@@ -332,7 +332,7 @@ class ApkManifestData {
       final _Attribute? enabled = activity.firstAttribute('android:enabled');
       final Iterable<_Element> intentFilters = activity.allElements('intent-filter');
       final bool isEnabledByDefault = enabled == null;
-      final bool isExplicitlyEnabled = enabled != null && enabled.value?.contains('0xffffffff') == true;
+      final bool isExplicitlyEnabled = enabled != null && (enabled.value?.contains('0xffffffff') ?? false);
       if (!(isEnabledByDefault || isExplicitlyEnabled)) {
         continue;
       }

packages/flutter_tools/lib/src/base/dds.dart

@@ -39,7 +39,7 @@ class DartDevelopmentService {
   }) async {
     final Uri ddsUri = Uri(
       scheme: 'http',
-      host: (ipv6 == true ? io.InternetAddress.loopbackIPv6 : io.InternetAddress.loopbackIPv4).host,
+      host: ((ipv6 ?? false) ? io.InternetAddress.loopbackIPv6 : io.InternetAddress.loopbackIPv4).host,
       port: hostPort ?? 0,
     );
     logger.printTrace(
@@ -51,7 +51,7 @@ class DartDevelopmentService {
           observatoryUri,
           serviceUri: ddsUri,
           enableAuthCodes: disableServiceAuthCodes != true,
-          ipv6: ipv6 == true,
+          ipv6: ipv6 ?? false,
         );
       unawaited(_ddsInstance?.done.whenComplete(() {
         if (!_completer.isCompleted) {

packages/flutter_tools/lib/src/base/logger.dart

@@ -447,7 +447,7 @@ class StdoutLogger extends Logger {
       shouldWrap: wrap ?? _outputPreferences.wrapText,
       columnWidth: _outputPreferences.wrapColumn,
     );
-    if (emphasis == true) {
+    if (emphasis ?? false) {
       message = terminal.bolden(message);
     }
     message = terminal.color(message, color ?? TerminalColor.red);
@@ -475,7 +475,7 @@ class StdoutLogger extends Logger {
       shouldWrap: wrap ?? _outputPreferences.wrapText,
       columnWidth: _outputPreferences.wrapColumn,
     );
-    if (emphasis == true) {
+    if (emphasis ?? false) {
       message = terminal.bolden(message);
     }
     message = terminal.color(message, color ?? TerminalColor.cyan);
@@ -500,13 +500,13 @@ class StdoutLogger extends Logger {
       shouldWrap: wrap ?? _outputPreferences.wrapText,
       columnWidth: _outputPreferences.wrapColumn,
     );
-    if (emphasis == true) {
+    if (emphasis ?? false) {
       message = terminal.bolden(message);
     }
     if (color != null) {
       message = terminal.color(message, color);
     }
-    if (newline != false) {
+    if (newline ?? true) {
       message = '$message\n';
     }
     writeToStdOut(message);
@@ -812,7 +812,7 @@ class BufferLogger extends Logger {
     int? hangingIndent,
     bool? wrap,
   }) {
-    if (newline != false) {
+    if (newline ?? true) {
       _status.writeln(wrapText(message,
         indent: indent,
         hangingIndent: hangingIndent,

packages/flutter_tools/lib/src/base/process.dart

@@ -458,7 +458,7 @@ class _DefaultProcessUtils implements ProcessUtils {
         }
         if (mappedLine != null) {
           final String message = '$prefix$mappedLine';
-          if (stdoutErrorMatcher?.hasMatch(mappedLine) == true) {
+          if (stdoutErrorMatcher?.hasMatch(mappedLine) ?? false) {
             _logger.printError(message, wrap: false);
           } else if (trace) {
             _logger.printTrace(message);

packages/flutter_tools/lib/src/commands/build_ios.dart

@@ -121,7 +121,7 @@ class BuildIOSArchiveCommand extends _BuildIOSSubCommand {
   Future<void> validateCommand() async {
     final String? exportOptions = exportOptionsPlist;
     if (exportOptions != null) {
-      if (argResults?.wasParsed('export-method') == true) {
+      if (argResults?.wasParsed('export-method') ?? false) {
         throwToolExit(
           '"--export-options-plist" is not compatible with "--export-method". Either use "--export-options-plist" and '
           'a plist describing how the IPA should be exported by Xcode, or use "--export-method" to create a new plist.\n'

packages/flutter_tools/lib/src/commands/config.dart

@@ -116,7 +116,7 @@ class ConfigCommand extends FlutterCommand {
       return FlutterCommandResult.success();
     }
 
-    if (argResults?.wasParsed('analytics') == true) {
+    if (argResults?.wasParsed('analytics') ?? false) {
       final bool value = boolArg('analytics');
       // The tool sends the analytics event *before* toggling the flag
       // intentionally to be sure that opt-out events are sent correctly.
@@ -131,19 +131,19 @@ class ConfigCommand extends FlutterCommand {
       globals.printStatus('Analytics reporting ${value ? 'enabled' : 'disabled'}.');
     }
 
-    if (argResults?.wasParsed('android-sdk') == true) {
+    if (argResults?.wasParsed('android-sdk') ?? false) {
       _updateConfig('android-sdk', stringArg('android-sdk')!);
     }
 
-    if (argResults?.wasParsed('android-studio-dir') == true) {
+    if (argResults?.wasParsed('android-studio-dir') ?? false) {
       _updateConfig('android-studio-dir', stringArg('android-studio-dir')!);
     }
 
-    if (argResults?.wasParsed('clear-ios-signing-cert') == true) {
+    if (argResults?.wasParsed('clear-ios-signing-cert') ?? false) {
       _updateConfig('ios-signing-cert', '');
     }
 
-    if (argResults?.wasParsed('build-dir') == true) {
+    if (argResults?.wasParsed('build-dir') ?? false) {
       final String buildDir = stringArg('build-dir')!;
       if (globals.fs.path.isAbsolute(buildDir)) {
         throwToolExit('build-dir should be a relative path');
@@ -156,7 +156,7 @@ class ConfigCommand extends FlutterCommand {
       if (configSetting == null) {
         continue;
       }
-      if (argResults?.wasParsed(configSetting) == true) {
+      if (argResults?.wasParsed(configSetting) ?? false) {
         final bool keyValue = boolArg(configSetting);
         globals.config.setValue(configSetting, keyValue);
         globals.printStatus('Setting "$configSetting" value to "$keyValue".');

packages/flutter_tools/lib/src/commands/debug_adapter.dart

@@ -56,7 +56,7 @@ class DebugAdapterCommand extends FlutterCommand {
       globals.stdio.stdout.nonBlocking,
       fileSystem: globals.fs,
       platform: globals.platform,
-      ipv6: ipv6 == true,
+      ipv6: ipv6 ?? false,
       enableDds: enableDds,
       test: boolArg('test'),
     );

packages/flutter_tools/lib/src/commands/doctor.dart

@@ -34,7 +34,7 @@ class DoctorCommand extends FlutterCommand {
   @override
   Future<FlutterCommandResult> runCommand() async {
     globals.flutterVersion.fetchTagsAndUpdate();
-    if (argResults?.wasParsed('check-for-remote-artifacts') == true) {
+    if (argResults?.wasParsed('check-for-remote-artifacts') ?? false) {
       final String engineRevision = stringArg('check-for-remote-artifacts')!;
       if (engineRevision.startsWith(RegExp(r'[a-f0-9]{1,40}'))) {
         final bool success = await globals.doctor?.checkRemoteArtifacts(engineRevision) ?? false;

packages/flutter_tools/lib/src/commands/screenshot.dart

@@ -100,7 +100,7 @@ class ScreenshotCommand extends FlutterCommand {
   @override
   Future<FlutterCommandResult> runCommand() async {
     File? outputFile;
-    if (argResults?.wasParsed(_kOut) == true) {
+    if (argResults?.wasParsed(_kOut) ?? false) {
       outputFile = globals.fs.file(stringArg(_kOut));
     }
 

packages/flutter_tools/lib/src/commands/symbolize.dart

@@ -71,7 +71,7 @@ class SymbolizeCommand extends FlutterCommand {
     if (!_fileSystem.isFileSync(stringArg('debug-info')!)) {
       throwToolExit('${stringArg('debug-info')} does not exist.');
     }
-    if (argResults?.wasParsed('input') == true && !_fileSystem.isFileSync(stringArg('input')!)) {
+    if ((argResults?.wasParsed('input') ?? false) && !_fileSystem.isFileSync(stringArg('input')!)) {
       throwToolExit('${stringArg('input')} does not exist.');
     }
     return super.validateCommand();
@@ -83,7 +83,7 @@ class SymbolizeCommand extends FlutterCommand {
     IOSink output;
 
     // Configure output to either specified file or stdout.
-    if (argResults?.wasParsed('output') == true) {
+    if (argResults?.wasParsed('output') ?? false) {
       final File outputFile = _fileSystem.file(stringArg('output'));
       if (!outputFile.parent.existsSync()) {
         outputFile.parent.createSync(recursive: true);
@@ -99,7 +99,7 @@ class SymbolizeCommand extends FlutterCommand {
     }
 
     // Configure input from either specified file or stdin.
-    if (argResults?.wasParsed('input') == true) {
+    if (argResults?.wasParsed('input') ?? false) {
       input = _fileSystem.file(stringArg('input')).openRead();
     } else {
       input = _stdio.stdin;

packages/flutter_tools/lib/src/devfs.dart

@@ -95,7 +95,7 @@ class DevFSFileContent extends DevFSContent {
       if (fileStat.type == FileSystemEntityType.notFound) {
         _fileStat = null;
         _linkTarget = null;
-      } else if (devFSConfig?.cacheSymlinks == true) {
+      } else if (devFSConfig?.cacheSymlinks ?? false) {
         _linkTarget = linkTarget;
       }
     }

packages/flutter_tools/lib/src/doctor.dart

@@ -130,7 +130,7 @@ class _DefaultDoctorValidatorsProvider implements DoctorValidatorsProvider {
         NoIdeValidator(),
       if (proxyValidator.shouldShow)
         proxyValidator,
-      if (globals.deviceManager?.canListAnything == true)
+      if (globals.deviceManager?.canListAnything ?? false)
         DeviceValidator(
           deviceManager: globals.deviceManager,
           userMessages: globals.userMessages,
@@ -153,11 +153,11 @@ class _DefaultDoctorValidatorsProvider implements DoctorValidatorsProvider {
         _workflows!.add(globals.iosWorkflow!);
       }
 
-      if (androidWorkflow?.appliesToHostPlatform == true) {
+      if (androidWorkflow?.appliesToHostPlatform ?? false) {
         _workflows!.add(androidWorkflow!);
       }
 
-      if (fuchsiaWorkflow?.appliesToHostPlatform == true) {
+      if (fuchsiaWorkflow?.appliesToHostPlatform ?? false) {
         _workflows!.add(fuchsiaWorkflow!);
       }
 
@@ -169,7 +169,7 @@ class _DefaultDoctorValidatorsProvider implements DoctorValidatorsProvider {
         _workflows!.add(macOSWorkflow);
       }
 
-      if (windowsWorkflow?.appliesToHostPlatform == true) {
+      if (windowsWorkflow?.appliesToHostPlatform ?? false) {
         _workflows!.add(windowsWorkflow!);
       }
 

packages/flutter_tools/lib/src/flutter_manifest.dart

@@ -273,7 +273,7 @@ class FlutterManifest {
   Map<String, Object?>? get supportedPlatforms {
     if (isPlugin) {
       final YamlMap? plugin = _flutterDescriptor['plugin'] as YamlMap?;
-      if (plugin?.containsKey('platforms') == true) {
+      if (plugin?.containsKey('platforms') ?? false) {
         final YamlMap? platformsMap = plugin!['platforms'] as YamlMap?;
         return platformsMap?.value.cast<String, Object?>();
       }

packages/flutter_tools/lib/src/flutter_plugins.dart

@@ -393,8 +393,8 @@ Future<void> _writeAndroidPluginRegistrant(FlutterProject project, List<Plugin>
 
       final List<String> pluginsUsingV1 = <String>[];
       for (final Map<String, Object?> plugin in androidPlugins) {
-        final bool supportsEmbeddingV1 = (plugin['supportsEmbeddingV1'] as bool?) == true;
+        final bool supportsEmbeddingV1 = (plugin['supportsEmbeddingV1'] as bool?) ?? false;
-        final bool supportsEmbeddingV2 = (plugin['supportsEmbeddingV2'] as bool?) == true;
+        final bool supportsEmbeddingV2 = (plugin['supportsEmbeddingV2'] as bool?) ?? false;
         if (supportsEmbeddingV1 && !supportsEmbeddingV2) {
           templateContext['needsShim'] = true;
           if (plugin['name'] != null) {
@@ -431,8 +431,8 @@ Future<void> _writeAndroidPluginRegistrant(FlutterProject project, List<Plugin>
         'Take a look at the docs for migrating an app: https://github.com/flutter/flutter/wiki/Upgrading-pre-1.12-Android-projects'
       );
       for (final Map<String, Object?> plugin in androidPlugins) {
-        final bool supportsEmbeddingV1 = (plugin['supportsEmbeddingV1'] as bool?) == true;
+        final bool supportsEmbeddingV1 = (plugin['supportsEmbeddingV1'] as bool?) ?? false;
-        final bool supportsEmbeddingV2 = (plugin['supportsEmbeddingV2'] as bool?) == true;
+        final bool supportsEmbeddingV2 = (plugin['supportsEmbeddingV2'] as bool?) ?? false;
         if (!supportsEmbeddingV1 && supportsEmbeddingV2) {
           throwToolExit(
             'The plugin `${plugin['name']}` requires your app to be migrated to '

packages/flutter_tools/lib/src/fuchsia/fuchsia_device.dart

@@ -723,7 +723,7 @@ class FuchsiaDevice extends Device {
             continue;
           }
           final int? port = vmService.httpAddress?.port;
-          if (port != null && uiIsolate.name?.contains(isolateName) == true) {
+          if (port != null && (uiIsolate.name?.contains(isolateName) ?? false)) {
             return port;
           }
         }
@@ -821,7 +821,7 @@ class FuchsiaIsolateDiscoveryProtocol {
           continue;
         }
         final int? port = service?.httpAddress?.port;
-        if (port != null && uiIsolate.name?.contains(_isolateName) == true) {
+        if (port != null && (uiIsolate.name?.contains(_isolateName) ?? false)) {
           _foundUri.complete(_device.ipv6
               ? Uri.parse('http://[$_ipv6Loopback]:$port/')
               : Uri.parse('http://$_ipv4Loopback:$port/'));

packages/flutter_tools/lib/src/fuchsia/fuchsia_pm.dart

@@ -230,7 +230,7 @@ class FuchsiaPackageServer {
     if (_process == null) {
       return false;
     }
-    return (await globals.fuchsiaSdk?.fuchsiaPM.publish(_repo, package.path)) == true;
+    return (await globals.fuchsiaSdk?.fuchsiaPM.publish(_repo, package.path)) ?? false;
   }
 
   @override

packages/flutter_tools/lib/src/ios/ios_emulators.dart

@@ -14,7 +14,7 @@ class IOSEmulators extends EmulatorDiscovery {
   bool get supportsPlatform => globals.platform.isMacOS;
 
   @override
-  bool get canListAnything => globals.iosWorkflow?.canListEmulators == true;
+  bool get canListAnything => globals.iosWorkflow?.canListEmulators ?? false;
 
   @override
   Future<List<Emulator>> get emulators async => getEmulators();

packages/flutter_tools/lib/src/ios/mac.dart

@@ -561,9 +561,9 @@ return result.exitCode != 0 &&
 
 Future<void> diagnoseXcodeBuildFailure(XcodeBuildResult result, Usage flutterUsage, Logger logger) async {
   final XcodeBuildExecution? xcodeBuildExecution = result.xcodeBuildExecution;
-  if (xcodeBuildExecution != null &&
+  if (xcodeBuildExecution != null
-      xcodeBuildExecution.environmentType == EnvironmentType.physical &&
+      && xcodeBuildExecution.environmentType == EnvironmentType.physical
-      result.stdout?.toUpperCase().contains('BITCODE') == true) {
+      && (result.stdout?.toUpperCase().contains('BITCODE') ?? false)) {
     BuildEvent('xcode-bitcode-failure',
       type: 'ios',
       command: xcodeBuildExecution.buildCommands.toString(),
@@ -575,9 +575,9 @@ Future<void> diagnoseXcodeBuildFailure(XcodeBuildResult result, Usage flutterUsa
   // Building for iOS Simulator, but the linked and embedded framework 'App.framework' was built for iOS.
   // or
   // Building for iOS, but the linked and embedded framework 'App.framework' was built for iOS Simulator.
-  if (result.stdout?.contains('Building for iOS') == true
+  if ((result.stdout?.contains('Building for iOS') ?? false)
-      && result.stdout?.contains('but the linked and embedded framework') == true
+      && (result.stdout?.contains('but the linked and embedded framework') ?? false)
-      && result.stdout?.contains('was built for iOS') == true) {
+      && (result.stdout?.contains('was built for iOS') ?? false)) {
     logger.printError('');
     logger.printError('Your Xcode project requires migration. See https://flutter.dev/docs/development/ios-project-migration for details.');
     logger.printError('');
@@ -585,11 +585,11 @@ Future<void> diagnoseXcodeBuildFailure(XcodeBuildResult result, Usage flutterUsa
     logger.printError('  flutter clean');
     return;
   }
-  if (xcodeBuildExecution != null &&
+  if (xcodeBuildExecution != null
-      xcodeBuildExecution.environmentType == EnvironmentType.physical &&
+      && xcodeBuildExecution.environmentType == EnvironmentType.physical
-      result.stdout?.contains('BCEROR') == true &&
+      && (result.stdout?.contains('BCEROR') ?? false)
       // May need updating if Xcode changes its outputs.
-      result.stdout?.contains("Xcode couldn't find a provisioning profile matching") == true) {
+      && (result.stdout?.contains("Xcode couldn't find a provisioning profile matching") ?? false)) {
     logger.printError(noProvisioningProfileInstruction, emphasis: true);
     return;
   }
@@ -603,9 +603,9 @@ Future<void> diagnoseXcodeBuildFailure(XcodeBuildResult result, Usage flutterUsa
     logger.printError(noDevelopmentTeamInstruction, emphasis: true);
     return;
   }
-  if (xcodeBuildExecution != null &&
+  if (xcodeBuildExecution != null
-      xcodeBuildExecution.environmentType == EnvironmentType.physical &&
+      && xcodeBuildExecution.environmentType == EnvironmentType.physical
-      xcodeBuildExecution.buildSettings['PRODUCT_BUNDLE_IDENTIFIER']?.contains('com.example') == true) {
+      && (xcodeBuildExecution.buildSettings['PRODUCT_BUNDLE_IDENTIFIER']?.contains('com.example') ?? false)) {
     logger.printError('');
     logger.printError('It appears that your application still contains the default signing identifier.');
     logger.printError("Try replacing 'com.example' with your signing id in Xcode:");

packages/flutter_tools/lib/src/macos/cocoapod_utils.dart

@@ -45,7 +45,7 @@ Future<void> processPodsIfNeeded(
     xcodeProject: xcodeProject,
     buildMode: buildMode,
     dependenciesChanged: !fingerprinter.doesFingerprintMatch(),
-  ) == true;
+  ) ?? false;
   if (didPodInstall) {
     fingerprinter.writeFingerprint();
   }

packages/flutter_tools/lib/src/macos/xcdevice.dart

@@ -206,7 +206,7 @@ class XCDevice {
         unawaited(stdoutSubscription.cancel());
         unawaited(stderrSubscription.cancel());
       }).whenComplete(() async {
-        if (_deviceIdentifierByEvent?.hasListener == true) {
+        if (_deviceIdentifierByEvent?.hasListener ?? false) {
           // Tell listeners the process died.
           await _deviceIdentifierByEvent?.close();
         }

packages/flutter_tools/lib/src/migrations/cmake_custom_command_migration.dart

@@ -62,7 +62,7 @@ class CmakeCustomCommandMigration extends ProjectMigrator {
       //   Manually-specified variables were not used by the project:
       //    FLUTTER_TARGET_PLATFORM
       // ------------------------------
-      if (addCustomCommandOriginal?.contains('linux-x64') == true) {
+      if (addCustomCommandOriginal?.contains('linux-x64') ?? false) {
         newProjectContents = newProjectContents.replaceAll('linux-x64', r'${FLUTTER_TARGET_PLATFORM}');
       }
     }

packages/flutter_tools/lib/src/platform_plugins.dart

@@ -474,7 +474,7 @@ class LinuxPlugin extends PluginPlatform implements NativeOrDartPlugin {
     bool? ffiPlugin,
     this.defaultPackage,
   })  : ffiPlugin = ffiPlugin ?? false,
-        assert(pluginClass != null || dartPluginClass != null || ffiPlugin == true || defaultPackage != null);
+        assert(pluginClass != null || dartPluginClass != null || (ffiPlugin ?? false) || defaultPackage != null);
 
   factory LinuxPlugin.fromYaml(String name, YamlMap yaml) {
     assert(validate(yaml));

packages/flutter_tools/lib/src/preview_device.dart

@@ -164,7 +164,7 @@ class PreviewDevice extends Device {
 
   @override
   Future<bool> stopApp(covariant ApplicationPackage app, {String? userIdentifier}) async {
-    return _process?.kill() == true;
+    return _process?.kill() ?? false;
   }
 
   @override

packages/flutter_tools/lib/src/runner/flutter_command.dart

@@ -290,7 +290,7 @@ abstract class FlutterCommand extends Command<void> {
   }
 
   String get targetFile {
-    if (argResults?.wasParsed('target') == true) {
+    if (argResults?.wasParsed('target') ?? false) {
       return stringArg('target')!;
     }
     final List<String>? rest = argResults?.rest;
@@ -422,8 +422,8 @@ abstract class FlutterCommand extends Command<void> {
 
   late final bool enableDds = () {
     bool ddsEnabled = false;
-    if (argResults?.wasParsed('disable-dds') == true) {
+    if (argResults?.wasParsed('disable-dds') ?? false) {
-      if (argResults?.wasParsed('dds') == true) {
+      if (argResults?.wasParsed('dds') ?? false) {
         throwToolExit(
             'The "--[no-]dds" and "--[no-]disable-dds" arguments are mutually exclusive. Only specify "--[no-]dds".');
       }
@@ -444,8 +444,8 @@ abstract class FlutterCommand extends Command<void> {
     return ddsEnabled;
   }();
 
-  bool get _hostVmServicePortProvided => argResults?.wasParsed('observatory-port') == true ||
+  bool get _hostVmServicePortProvided => (argResults?.wasParsed('observatory-port') ?? false)
-                                         argResults?.wasParsed('host-vmservice-port') == true;
+      || (argResults?.wasParsed('host-vmservice-port') ?? false);
 
   int _tryParseHostVmservicePort() {
     final String? observatoryPort = stringArg('observatory-port');
@@ -464,7 +464,7 @@ abstract class FlutterCommand extends Command<void> {
     if (argResults?.wasParsed('dds-port') != true && _hostVmServicePortProvided) {
       // If an explicit DDS port is _not_ provided, use the host-vmservice-port for DDS.
       return _tryParseHostVmservicePort();
-    } else if (argResults?.wasParsed('dds-port') == true) {
+    } else if (argResults?.wasParsed('dds-port') ?? false) {
       // If an explicit DDS port is provided, use dds-port for DDS.
       return int.tryParse(stringArg('dds-port')!) ?? 0;
     }
@@ -473,7 +473,7 @@ abstract class FlutterCommand extends Command<void> {
   }
 
   Uri? get devToolsServerAddress {
-    if (argResults?.wasParsed(kDevToolsServerAddress) == true) {
+    if (argResults?.wasParsed(kDevToolsServerAddress) ?? false) {
       final Uri? uri = Uri.tryParse(stringArg(kDevToolsServerAddress)!);
       if (uri != null && uri.host.isNotEmpty && uri.port != 0) {
         return uri;
@@ -493,8 +493,8 @@ abstract class FlutterCommand extends Command<void> {
     if (!_usesPortOption || !_hostVmServicePortProvided) {
       return null;
     }
-    if (argResults?.wasParsed('observatory-port') == true &&
+    if ((argResults?.wasParsed('observatory-port') ?? false)
-        argResults?.wasParsed('host-vmservice-port') == true) {
+        && (argResults?.wasParsed('host-vmservice-port') ?? false)) {
       throwToolExit('Only one of "--observatory-port" and '
         '"--host-vmservice-port" may be specified.');
     }
@@ -612,8 +612,8 @@ abstract class FlutterCommand extends Command<void> {
   bool get reportNullSafety => false;
 
   late final Duration? deviceDiscoveryTimeout = () {
-    if (argResults?.options.contains(FlutterOptions.kDeviceTimeout) == true
+    if ((argResults?.options.contains(FlutterOptions.kDeviceTimeout) ?? false)
-        && argResults?.wasParsed(FlutterOptions.kDeviceTimeout) == true) {
+        && (argResults?.wasParsed(FlutterOptions.kDeviceTimeout) ?? false)) {
       final int? timeoutSeconds = int.tryParse(stringArg(FlutterOptions.kDeviceTimeout)!);
       if (timeoutSeconds == null) {
         throwToolExit( 'Could not parse "--${FlutterOptions.kDeviceTimeout}" argument. It must be an integer.');
@@ -1000,7 +1000,7 @@ abstract class FlutterCommand extends Command<void> {
       // Explicitly check for `true` and `false` so that `null` results in not
       // passing a flag. Examine the entrypoint file to determine if it
       // is opted in or out.
-      final bool wasNullSafetyFlagParsed = argResults?.wasParsed(FlutterOptions.kNullSafety) == true;
+      final bool wasNullSafetyFlagParsed = argResults?.wasParsed(FlutterOptions.kNullSafety) ?? false;
       if (!wasNullSafetyFlagParsed && (argParser.options.containsKey('target') || forcedTargetFile != null)) {
         final File entrypointFile = forcedTargetFile ?? globals.fs.file(targetFile);
         final LanguageVersion languageVersion = determineLanguageVersion(

packages/flutter_tools/lib/src/runner/flutter_command_runner.dart

@@ -205,12 +205,12 @@ class FlutterCommandRunner extends CommandRunner<void> {
       wrapColumn: wrapColumn,
     );
 
-    if ((topLevelResults['show-test-device'] as bool?) == true ||
+    if (((topLevelResults['show-test-device'] as bool?) ?? false)
-        topLevelResults['device-id'] == FlutterTesterDevices.kTesterDeviceId) {
+        || topLevelResults['device-id'] == FlutterTesterDevices.kTesterDeviceId) {
       FlutterTesterDevices.showFlutterTesterDevice = true;
     }
-    if ((topLevelResults['show-web-server-device'] as bool?) == true  ||
+    if (((topLevelResults['show-web-server-device'] as bool?) ?? false)
-        topLevelResults['device-id'] == WebServerDevice.kWebServerDeviceId) {
+        || topLevelResults['device-id'] == WebServerDevice.kWebServerDeviceId) {
       WebServerDevice.showWebServerDevice = true;
     }
 
@@ -231,13 +231,13 @@ class FlutterCommandRunner extends CommandRunner<void> {
         return MapEntry<Type, Generator>(type, () => value);
       }),
       body: () async {
-        globals.logger.quiet = (topLevelResults['quiet'] as bool?) == true;
+        globals.logger.quiet = (topLevelResults['quiet'] as bool?) ?? false;
 
         if (globals.platform.environment['FLUTTER_ALREADY_LOCKED'] != 'true') {
           await globals.cache.lock();
         }
 
-        if ((topLevelResults['suppress-analytics'] as bool?) == true) {
+        if ((topLevelResults['suppress-analytics'] as bool?) ?? false) {
           globals.flutterUsage.suppressAnalytics = true;
         }
 
@@ -258,7 +258,7 @@ class FlutterCommandRunner extends CommandRunner<void> {
         // See if the user specified a specific device.
         globals.deviceManager?.specifiedDeviceId = topLevelResults['device-id'] as String?;
 
-        if ((topLevelResults['version'] as bool?) == true) {
+        if ((topLevelResults['version'] as bool?) ?? false) {
           globals.flutterUsage.sendCommand('version');
           globals.flutterVersion.fetchTagsAndUpdate();
           String status;

packages/flutter_tools/lib/src/template.dart

@@ -166,7 +166,7 @@ class Template {
       throwToolExit('Failed to flutter create at ${destination.path}.');
     }
     int fileCount = 0;
-    final bool implementationTests = (context['implementationTests'] as bool?) == true;
+    final bool implementationTests = (context['implementationTests'] as bool?) ?? false;
 
     /// Returns the resolved destination path corresponding to the specified
     /// raw destination path, after performing language filtering and template
@@ -184,38 +184,38 @@ class Template {
         relativeDestinationPath = relativeDestinationPath.replaceAll('$platform-$language.tmpl', platform);
       }
 
-      final bool android = (context['android'] as bool?) == true;
+      final bool android = (context['android'] as bool?) ?? false;
       if (relativeDestinationPath.contains('android') && !android) {
         return null;
       }
 
-      final bool ios = (context['ios'] as bool?) == true;
+      final bool ios = (context['ios'] as bool?) ?? false;
       if (relativeDestinationPath.contains('ios') && !ios) {
         return null;
       }
 
       // Only build a web project if explicitly asked.
-      final bool web = (context['web'] as bool?) == true;
+      final bool web = (context['web'] as bool?) ?? false;
       if (relativeDestinationPath.contains('web') && !web) {
         return null;
       }
       // Only build a Linux project if explicitly asked.
-      final bool linux = (context['linux'] as bool?) == true;
+      final bool linux = (context['linux'] as bool?) ?? false;
       if (relativeDestinationPath.startsWith('linux.tmpl') && !linux) {
         return null;
       }
       // Only build a macOS project if explicitly asked.
-      final bool macOS = (context['macos'] as bool?) == true;
+      final bool macOS = (context['macos'] as bool?) ?? false;
       if (relativeDestinationPath.startsWith('macos.tmpl') && !macOS) {
         return null;
       }
       // Only build a Windows project if explicitly asked.
-      final bool windows = (context['windows'] as bool?) == true;
+      final bool windows = (context['windows'] as bool?) ?? false;
       if (relativeDestinationPath.startsWith('windows.tmpl') && !windows) {
         return null;
       }
       // Only build a Windows UWP project if explicitly asked.
-      final bool windowsUwp = (context['winuwp'] as bool?) == true;
+      final bool windowsUwp = (context['winuwp'] as bool?) ?? false;
       if (relativeDestinationPath.startsWith('winuwp.tmpl') && !windowsUwp) {
         return null;
       }

packages/flutter_tools/lib/src/vmservice.dart

@@ -866,7 +866,7 @@ class FlutterVmService {
       final List<vm_service.IsolateRef> refs = await _getIsolateRefs();
       for (final vm_service.IsolateRef ref in refs) {
         final vm_service.Isolate? isolate = await getIsolateOrNull(ref.id!);
-        if (isolate != null && isolate.extensionRPCs?.contains(extensionName) == true) {
+        if (isolate != null && (isolate.extensionRPCs?.contains(extensionName) ?? false)) {
           return ref;
         }
       }

packages/flutter_tools/lib/src/vscode/vscode.dart

@@ -293,7 +293,7 @@ class VsCode {
     final String jsonString = fileSystem.file(packageJsonPath).readAsStringSync();
     try {
       final Map<String, dynamic>? jsonObject = castStringKeyedMap(json.decode(jsonString));
-      if (jsonObject?.containsKey('version') == true) {
+      if (jsonObject?.containsKey('version') ?? false) {
         return jsonObject!['version'] as String;
       }
     } on FormatException {

packages/flutter_tools/lib/src/xcode_project.dart

@@ -230,7 +230,7 @@ class IosProject extends XcodeBasedProject {
     // https://flutter.dev/docs/deployment/ios#review-xcode-project-settings
     // The only source of truth for the name is Xcode's interpretation of the build settings.
     String? productName;
-    if (globals.xcodeProjectInterpreter?.isInstalled == true) {
+    if (globals.xcodeProjectInterpreter?.isInstalled ?? false) {
       final Map<String, String>? xcodeBuildSettings = await buildSettingsForBuildInfo(buildInfo);
       if (xcodeBuildSettings != null) {
         productName = xcodeBuildSettings['FULL_PRODUCT_NAME'];

packages/flutter_tools/test/integration.shard/test_driver.dart

@@ -158,7 +158,7 @@ abstract class FlutterTestDriver {
       _vmService!.streamListen('Debug'),
     ]);
 
-    if ((await _vmService!.getVM()).isolates?.isEmpty != false) {
+    if ((await _vmService!.getVM()).isolates?.isEmpty ?? true) {
       await isolateStarted.future;
     }
 
@@ -287,7 +287,7 @@ abstract class FlutterTestDriver {
     return _vmService!.onDebugEvent
       .where((Event event) {
         return event.isolate?.id == isolateId
-            && event.kind?.startsWith(kind) == true;
+            && (event.kind?.startsWith(kind) ?? false);
       }).first;
   }
 
@@ -302,7 +302,7 @@ abstract class FlutterTestDriver {
         // don't need to wait for the event.
         final VmService vmService = _vmService!;
         final Isolate isolate = await vmService.getIsolate(isolateId);
-        if (isolate.pauseEvent?.kind?.startsWith(kind) == true) {
+        if (isolate.pauseEvent?.kind?.startsWith(kind) ?? false) {
           _debugPrint('Isolate was already at "$kind" (${isolate.pauseEvent!.kind}).');
           event.ignore();
         } else {
@@ -324,7 +324,7 @@ abstract class FlutterTestDriver {
 
   Future<bool> isAtAsyncSuspension() async {
     final Isolate isolate = await getFlutterIsolate();
-    return isolate.pauseEvent?.atAsyncSuspension == true;
+    return isolate.pauseEvent?.atAsyncSuspension ?? false;
   }
 
   Future<Isolate?> stepOverOrOverAsyncSuspension({ bool waitForNextPause = true }) async {