Remove textScaleFactor references from flutter/flutter (#142271)

These should the the last remaining `MediaQueryData.textScaleFactor` and `TextScaler.textScaleFactor` references.

dev/integration_tests/flutter_gallery/lib/demo/shrine/supplemental/product_card.dart

@@ -33,6 +33,10 @@ class ProductCard extends StatelessWidget {
       fit: BoxFit.cover,
     );
 
+    // The fontSize to use for computing the heuristic UI scaling factor.
+    const double defaultFontSize = 14.0;
+    final double containerScaingFactor = MediaQuery.textScalerOf(context).scale(defaultFontSize) / defaultFontSize;
+
     return ScopedModelDescendant<AppStateModel>(
       builder: (BuildContext context, Widget? child, AppStateModel model) {
         return GestureDetector(
@@ -52,8 +56,7 @@ class ProductCard extends StatelessWidget {
                 child: imageWidget,
               ),
               SizedBox(
-                // ignore: deprecated_member_use, https://github.com/flutter/flutter/issues/128825
-                height: kTextBoxHeight * MediaQuery.textScalerOf(context).textScaleFactor,
+                height: kTextBoxHeight * containerScaingFactor,
                 width: 121.0,
                 child: Column(
                   mainAxisAlignment: MainAxisAlignment.end,

dev/integration_tests/flutter_gallery/lib/gallery/home.dart

@@ -178,8 +178,9 @@ class _DemoItem extends StatelessWidget {
   Widget build(BuildContext context) {
     final ThemeData theme = Theme.of(context);
     final bool isDark = theme.brightness == Brightness.dark;
-    // ignore: deprecated_member_use, https://github.com/flutter/flutter/issues/128825
-    final double textScaleFactor = MediaQuery.textScalerOf(context).textScaleFactor;
+    // The fontSize to use for computing the heuristic UI scaling factor.
+    const double defaultFontSize = 14.0;
+    final double containerScaingFactor = MediaQuery.textScalerOf(context).scale(defaultFontSize) / defaultFontSize;
     return RawMaterialButton(
       splashColor: theme.primaryColor.withOpacity(0.12),
       highlightColor: Colors.transparent,
@@ -187,7 +188,7 @@ class _DemoItem extends StatelessWidget {
         _launchDemo(context);
       },
       child: Container(
-        constraints: BoxConstraints(minHeight: _kDemoItemHeight * textScaleFactor),
+        constraints: BoxConstraints(minHeight: _kDemoItemHeight * containerScaingFactor),
         child: Row(
           children: <Widget>[
             Container(

examples/api/lib/material/time_picker/show_time_picker.0.dart

@@ -126,11 +126,10 @@ class _TimePickerOptionsState extends State<TimePickerOptions> {
         children: <Widget>[
           Expanded(
             child: GridView(
-              gridDelegate: SliverGridDelegateWithMaxCrossAxisExtent(
+              gridDelegate: const SliverGridDelegateWithMaxCrossAxisExtent(
                 maxCrossAxisExtent: 350,
                 mainAxisSpacing: 4,
-                // ignore: deprecated_member_use, https://github.com/flutter/flutter/issues/128825
-                mainAxisExtent: 200 * MediaQuery.textScalerOf(context).textScaleFactor,
+                mainAxisExtent: 200,
                 crossAxisSpacing: 4,
               ),
               children: <Widget>[

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

@@ -671,6 +671,10 @@ class _RangeSliderState extends State<RangeSlider> with TickerProviderStateMixin
     // in slider.dart.
     Size screenSize() => MediaQuery.sizeOf(context);
 
+    final double fontSize = sliderTheme.valueIndicatorTextStyle?.fontSize ?? kDefaultFontSize;
+    final double fontSizeToScale = fontSize == 0.0 ? kDefaultFontSize : fontSize;
+    final double effectiveTextScale = MediaQuery.textScalerOf(context).scale(fontSizeToScale) / fontSizeToScale;
+
     return FocusableActionDetector(
       enabled: _enabled,
       onShowHoverHighlight: _handleHoverChanged,
@@ -683,7 +687,7 @@ class _RangeSliderState extends State<RangeSlider> with TickerProviderStateMixin
           divisions: widget.divisions,
           labels: widget.labels,
           sliderTheme: sliderTheme,
-          textScaleFactor: MediaQuery.of(context).textScaleFactor,
+          textScaleFactor: effectiveTextScale,
           screenSize: screenSize(),
           onChanged: _enabled && (widget.max > widget.min) ? _handleChanged : null,
           onChangeStart: widget.onChangeStart != null ? _handleDragStart : null,

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

@@ -882,13 +882,16 @@ class _SliderState extends State<Slider> with TickerProviderStateMixin {
         shortcutMap = _traditionalNavShortcutMap;
     }
 
-    final double textScaleFactor = theme.useMaterial3
+    final double fontSize = sliderTheme.valueIndicatorTextStyle?.fontSize ?? kDefaultFontSize;
+    final double fontSizeToScale = fontSize == 0.0 ? kDefaultFontSize : fontSize;
+    final TextScaler textScaler = theme.useMaterial3
       // TODO(tahatesser): This is an eye-balled value.
       // This needs to be updated when accessibility
       // guidelines are available on the material specs page
       // https://m3.material.io/components/sliders/accessibility.
-      ? MediaQuery.textScalerOf(context).clamp(maxScaleFactor: 1.3).textScaleFactor
-      : MediaQuery.textScalerOf(context).textScaleFactor;
+      ? MediaQuery.textScalerOf(context).clamp(maxScaleFactor: 1.3)
+      : MediaQuery.textScalerOf(context);
+    final double effectiveTextScale = textScaler.scale(fontSizeToScale) / fontSizeToScale;
 
     return Semantics(
       container: true,
@@ -912,7 +915,7 @@ class _SliderState extends State<Slider> with TickerProviderStateMixin {
             divisions: widget.divisions,
             label: widget.label,
             sliderTheme: sliderTheme,
-            textScaleFactor: textScaleFactor,
+            textScaleFactor: effectiveTextScale,
             screenSize: screenSize(),
             onChanged: (widget.onChanged != null) && (widget.max > widget.min) ? _handleChanged : null,
             onChangeStart: _handleDragStart,

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

@@ -902,7 +902,7 @@ abstract class SliderComponentShape {
   /// The `textScaleFactor` argument can be used to determine whether the
   /// component should paint larger or smaller, depending on whether
   /// [textScaleFactor] is greater than 1 for larger, and between 0 and 1 for
-  /// smaller. It usually comes from [MediaQueryData.textScaleFactor].
+  /// smaller. It's usually computed from [MediaQueryData.textScaler].
   /// {@endtemplate}
   ///
   /// {@template flutter.material.SliderComponentShape.paint.sizeWithOverflow}

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

@@ -5405,11 +5405,7 @@ class _ScribblePlaceholder extends WidgetSpan {
     if (hasStyle) {
       builder.pushStyle(style!.getTextStyle(textScaler: textScaler));
     }
-    builder.addPlaceholder(
-      size.width * textScaler.textScaleFactor,
-      size.height * textScaler.textScaleFactor,
-      alignment,
-    );
+    builder.addPlaceholder(size.width, size.height, alignment);
     if (hasStyle) {
       builder.pop();
     }

packages/flutter/test/cupertino/nav_bar_test.dart

@@ -1197,8 +1197,9 @@ void main() {
     await tester.pumpWidget(
       CupertinoApp(
         home: Builder(builder: (BuildContext context) {
-          return MediaQuery(
-            data: MediaQuery.of(context).copyWith(textScaleFactor: 99),
+          return MediaQuery.withClampedTextScaling(
+            minScaleFactor: 99,
+            maxScaleFactor: 99,
             child: const CupertinoPageScaffold(
               child: CustomScrollView(
                 slivers: <Widget>[
@@ -1243,8 +1244,9 @@ void main() {
     tester.state<NavigatorState>(find.byType(Navigator)).push(CupertinoPageRoute<void>(
       title: 'title',
       builder: (BuildContext context) {
-        return MediaQuery(
-          data: MediaQuery.of(context).copyWith(textScaleFactor: 99),
+        return MediaQuery.withClampedTextScaling(
+          minScaleFactor: 99,
+          maxScaleFactor: 99,
           child: const CupertinoPageScaffold(
             child: CustomScrollView(
               slivers: <Widget>[

packages/flutter/test/cupertino/tab_scaffold_test.dart

@@ -1098,8 +1098,9 @@ void main() {
     await tester.pumpWidget(
       CupertinoApp(
         home: Builder(builder: (BuildContext context) {
-          return MediaQuery(
-            data: MediaQuery.of(context).copyWith(textScaleFactor: 99),
+          return MediaQuery.withClampedTextScaling(
+            minScaleFactor: 99,
+            maxScaleFactor: 99,
             child: CupertinoTabScaffold(
               tabBar: CupertinoTabBar(
                 items: List<BottomNavigationBarItem>.generate(

packages/flutter/test/material/dialog_test.dart

@@ -30,8 +30,9 @@ MaterialApp _buildAppWithDialog(
                   context: context,
                   traversalEdgeBehavior: traversalEdgeBehavior,
                   builder: (BuildContext context) {
-                    return MediaQuery(
-                      data: MediaQuery.of(context).copyWith(textScaleFactor: textScaleFactor),
+                    return MediaQuery.withClampedTextScaling(
+                      minScaleFactor: textScaleFactor,
+                      maxScaleFactor: textScaleFactor,
                       child: dialog,
                     );
                   },

packages/flutter/test/material/dropdown_form_field_test.dart

@@ -575,8 +575,9 @@ void main() {
       TestApp(
         textDirection: TextDirection.ltr,
         child: Builder(
-          builder: (BuildContext context) => MediaQuery(
-            data: MediaQuery.of(context).copyWith(textScaleFactor: 3.0),
+          builder: (BuildContext context) => MediaQuery.withClampedTextScaling(
+            minScaleFactor: 3.0,
+            maxScaleFactor: 3.0,
             child: Material(
               child: Center(
                 child: DropdownButtonFormField<String>(

packages/flutter/test/material/elevated_button_test.dart

@@ -1058,10 +1058,9 @@ void main() {
                 ),
                 home: Builder(
                   builder: (BuildContext context) {
-                    return MediaQuery(
-                      data: MediaQuery.of(context).copyWith(
-                        textScaleFactor: textScaleFactor,
-                      ),
+                    return MediaQuery.withClampedTextScaling(
+                      minScaleFactor: textScaleFactor,
+                      maxScaleFactor: textScaleFactor,
                       child: Directionality(
                         textDirection: textDirection,
                         child: Scaffold(
@@ -1225,10 +1224,9 @@ void main() {
         theme: ThemeData.from(colorScheme: const ColorScheme.light()),
         home: Builder(
           builder: (BuildContext context) {
-            return MediaQuery(
-              data: MediaQuery.of(context).copyWith(
-                textScaleFactor: 2,
-              ),
+            return MediaQuery.withClampedTextScaling(
+              minScaleFactor: 2,
+              maxScaleFactor: 2,
               child: Scaffold(
                 body: Center(
                   child: ElevatedButton(

packages/flutter/test/material/filled_button_test.dart

@@ -1203,10 +1203,9 @@ void main() {
                 ),
                 home: Builder(
                   builder: (BuildContext context) {
-                    return MediaQuery(
-                      data: MediaQuery.of(context).copyWith(
-                        textScaleFactor: textScaleFactor,
-                      ),
+                    return MediaQuery.withClampedTextScaling(
+                      minScaleFactor: textScaleFactor,
+                      maxScaleFactor: textScaleFactor,
                       child: Directionality(
                         textDirection: textDirection,
                         child: Scaffold(
@@ -1339,10 +1338,9 @@ void main() {
         theme: ThemeData.from(colorScheme: const ColorScheme.light()),
         home: Builder(
           builder: (BuildContext context) {
-            return MediaQuery(
-              data: MediaQuery.of(context).copyWith(
-                textScaleFactor: 2,
-              ),
+            return MediaQuery.withClampedTextScaling(
+              minScaleFactor: 2,
+              maxScaleFactor: 2,
               child: Scaffold(
                 body: Center(
                   child: FilledButton(

packages/flutter/test/material/navigation_rail_test.dart

@@ -1856,8 +1856,9 @@ void main() {
             return Scaffold(
               body: Row(
                 children: <Widget>[
-                  MediaQuery(
-                    data: MediaQuery.of(context).copyWith(textScaleFactor: 3.0),
+                  MediaQuery.withClampedTextScaling(
+                    minScaleFactor: 3.0,
+                    maxScaleFactor: 3.0,
                     child: NavigationRail(
                       selectedIndex: 0,
                       destinations: const <NavigationRailDestination>[
@@ -5135,8 +5136,9 @@ void main() {
               return Scaffold(
                 body: Row(
                   children: <Widget>[
-                    MediaQuery(
-                      data: MediaQuery.of(context).copyWith(textScaleFactor: 3.0),
+                    MediaQuery.withClampedTextScaling(
+                      minScaleFactor: 3.0,
+                      maxScaleFactor: 3.0,
                       child: NavigationRail(
                         selectedIndex: 0,
                         destinations: const <NavigationRailDestination>[
@@ -5511,8 +5513,9 @@ Future<void> _pumpNavigationRail(
       ),
       home: Builder(
         builder: (BuildContext context) {
-          return MediaQuery(
-            data: MediaQuery.of(context).copyWith(textScaleFactor: textScaleFactor),
+          return MediaQuery.withClampedTextScaling(
+            minScaleFactor: textScaleFactor,
+            maxScaleFactor: textScaleFactor,
             child: Scaffold(
               body: Row(
                 children: <Widget>[

packages/flutter/test/material/outlined_button_test.dart

@@ -1310,10 +1310,9 @@ void main() {
                 ),
                 home: Builder(
                   builder: (BuildContext context) {
-                    return MediaQuery(
-                      data: MediaQuery.of(context).copyWith(
-                        textScaleFactor: textScaleFactor,
-                      ),
+                    return MediaQuery.withClampedTextScaling(
+                      minScaleFactor: textScaleFactor,
+                      maxScaleFactor: textScaleFactor,
                       child: Directionality(
                         textDirection: textDirection,
                         child: Scaffold(
@@ -1449,10 +1448,9 @@ void main() {
         theme: ThemeData(useMaterial3: false),
         home: Builder(
           builder: (BuildContext context) {
-            return MediaQuery(
-              data: MediaQuery.of(context).copyWith(
-                textScaleFactor: 2,
-              ),
+            return MediaQuery.withClampedTextScaling(
+              minScaleFactor: 2,
+              maxScaleFactor: 2,
               child: Scaffold(
                 body: Center(
                   child: OutlinedButton(

packages/flutter/test/material/text_button_test.dart

@@ -1084,10 +1084,9 @@ void main() {
                 ),
                 home: Builder(
                   builder: (BuildContext context) {
-                    return MediaQuery(
-                      data: MediaQuery.of(context).copyWith(
-                        textScaleFactor: textScaleFactor,
-                      ),
+                    return MediaQuery.withClampedTextScaling(
+                      minScaleFactor: textScaleFactor,
+                      maxScaleFactor: textScaleFactor,
                       child: Directionality(
                         textDirection: textDirection,
                         child: Scaffold(
@@ -1226,10 +1225,9 @@ void main() {
         theme: ThemeData.from(colorScheme: const ColorScheme.light()),
         home: Builder(
           builder: (BuildContext context) {
-            return MediaQuery(
-              data: MediaQuery.of(context).copyWith(
-                textScaleFactor: 2,
-              ),
+            return MediaQuery.withClampedTextScaling(
+              minScaleFactor: 2,
+              maxScaleFactor: 2,
               child: Scaffold(
                 body: Center(
                   child: TextButton(