Update text field input width when there are prefix/suffix icons (#116690)

* Update input_decorator_test.dart

Update input_decorator.dart

Update input_decorator.dart

Update input_decorator.dart

Update input_decorator.dart

Update input_decorator.dart

Revert "Update input_decorator.dart"

This reverts commit 6a6d2fd0c145c15440405060190ef714b78441c9.

Update input_decorator.dart

Update input_decorator_test.dart

Update input_decorator.dart

lint

* Update input_decorator.dart

Author: hannah-hyj

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

@@ -978,12 +978,12 @@ class _RenderDecoration extends RenderBox with SlottedContainerRenderObjectMixin
       0.0,
       constraints.maxWidth - (
         _boxSize(icon).width
-        + contentPadding.left
+        + (prefixIcon != null ? 0 : (textDirection == TextDirection.ltr ? contentPadding.left : contentPadding.right))
         + _boxSize(prefixIcon).width
         + _boxSize(prefix).width
         + _boxSize(suffix).width
         + _boxSize(suffixIcon).width
-        + contentPadding.right),
+        + (suffixIcon != null ? 0 : (textDirection == TextDirection.ltr ? contentPadding.right : contentPadding.left))),
     );
     // Increase the available width for the label when it is scaled down.
     final double invertedLabelScale = lerpDouble(1.00, 1 / _kFinalLabelScale, decoration.floatingLabelProgress)!;

packages/flutter/test/material/input_decorator_test.dart

@@ -3182,6 +3182,65 @@ void main() {
     expect(FloatingLabelAlignment.center.toString(), 'FloatingLabelAlignment.center');
   });
 
+  group('inputText width', () {
+    testWidgets('outline textField', (WidgetTester tester) async {
+      await tester.pumpWidget(
+        buildInputDecorator(
+          useMaterial3: useMaterial3,
+          decoration: const InputDecoration(
+            border: OutlineInputBorder(),
+          ),
+        ),
+      );
+      expect(tester.getSize(find.byType(InputDecorator)), const Size(800.0, 56.0));
+      expect(tester.getTopLeft(find.text('text')).dx, 12.0);
+      expect(tester.getTopRight(find.text('text')).dx, 788.0);
+    });
+    testWidgets('outline textField with prefix and suffix icons', (WidgetTester tester) async {
+      await tester.pumpWidget(
+        buildInputDecorator(
+          useMaterial3: useMaterial3,
+          decoration: const InputDecoration(
+            border: OutlineInputBorder(),
+            prefixIcon: Icon(Icons.visibility),
+            suffixIcon: Icon(Icons.close),
+          ),
+        ),
+      );
+      expect(tester.getSize(find.byType(InputDecorator)), const Size(800.0, 56.0));
+      expect(tester.getTopLeft(find.text('text')).dx, 48.0);
+      expect(tester.getTopRight(find.text('text')).dx, 752.0);
+    });
+    testWidgets('filled textField', (WidgetTester tester) async {
+      await tester.pumpWidget(
+        buildInputDecorator(
+          useMaterial3: useMaterial3,
+          decoration: const InputDecoration(
+            filled: true,
+          ),
+        ),
+      );
+      expect(tester.getSize(find.byType(InputDecorator)), const Size(800.0, 48.0));
+      expect(tester.getTopLeft(find.text('text')).dx, 12.0);
+      expect(tester.getTopRight(find.text('text')).dx, 788.0);
+    });
+    testWidgets('filled textField with prefix and suffix icons', (WidgetTester tester) async {
+      await tester.pumpWidget(
+        buildInputDecorator(
+          useMaterial3: useMaterial3,
+          decoration: const InputDecoration(
+            filled: true,
+            prefixIcon: Icon(Icons.visibility),
+            suffixIcon: Icon(Icons.close),
+          ),
+        ),
+      );
+      expect(tester.getSize(find.byType(InputDecorator)), const Size(800.0, 48.0));
+      expect(tester.getTopLeft(find.text('text')).dx, 48.0);
+      expect(tester.getTopRight(find.text('text')).dx, 752.0);
+    });
+  });
+
   group('floatingLabelAlignment', () {
     Widget buildInputDecoratorWithFloatingLabel({required TextDirection textDirection,
           required bool hasIcon,