Remove unused context parameter (#124254)

Tidying up the spell check API.

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

@@ -45,7 +45,6 @@ class CupertinoSpellCheckSuggestionsToolbar extends StatelessWidget {
   /// Builds the button items for the toolbar based on the available
   /// spell check suggestions.
   static List<ContextMenuButtonItem>? buildButtonItems(
-    BuildContext context,
     EditableTextState editableTextState,
   ) {
     // Determine if composing region is misspelled.
@@ -58,8 +57,9 @@ class CupertinoSpellCheckSuggestionsToolbar extends StatelessWidget {
       return null;
     }
     if (spanAtCursorIndex.suggestions.isEmpty) {
-      assert(debugCheckHasCupertinoLocalizations(context));
-      final CupertinoLocalizations localizations = CupertinoLocalizations.of(context);
+      assert(debugCheckHasCupertinoLocalizations(editableTextState.context));
+      final CupertinoLocalizations localizations =
+          CupertinoLocalizations.of(editableTextState.context);
       return <ContextMenuButtonItem>[
         ContextMenuButtonItem(
           onPressed: () {},

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

@@ -802,7 +802,7 @@ class CupertinoTextField extends StatefulWidget {
     EditableTextState editableTextState,
   ) {
     final List<ContextMenuButtonItem>? buttonItems =
-      CupertinoSpellCheckSuggestionsToolbar.buildButtonItems(context, editableTextState);
+      CupertinoSpellCheckSuggestionsToolbar.buildButtonItems(editableTextState);
 
     if (buttonItems == null || buttonItems.isEmpty){
       return const SizedBox.shrink();

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

@@ -62,7 +62,6 @@ class SpellCheckSuggestionsToolbar extends StatelessWidget {
   /// Builds the button items for the toolbar based on the available
   /// spell check suggestions.
   static List<ContextMenuButtonItem>? buildButtonItems(
-    BuildContext context,
     EditableTextState editableTextState,
   ) {
     // Determine if composing region is misspelled.

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

@@ -816,7 +816,7 @@ class TextField extends StatefulWidget {
     final Offset anchor =
       SpellCheckSuggestionsToolbar.getToolbarAnchor(editableTextState.contextMenuAnchors);
     final List<ContextMenuButtonItem>? buttonItems =
-      SpellCheckSuggestionsToolbar.buildButtonItems(context, editableTextState);
+      SpellCheckSuggestionsToolbar.buildButtonItems(editableTextState);
 
     if (buttonItems == null){
       return const SizedBox.shrink();

packages/flutter/test/cupertino/spell_check_suggestions_toolbar_test.dart

@@ -0,0 +1,57 @@
+// Copyright 2014 The Flutter Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import 'package:flutter/cupertino.dart';
+import 'package:flutter/services.dart';
+
+import 'package:flutter_test/flutter_test.dart';
+
+void main() {
+  TestWidgetsFlutterBinding.ensureInitialized();
+
+  testWidgets('buildButtonItems builds a "No Replacements Found" button when no suggestions', (WidgetTester tester) async {
+    await tester.pumpWidget(
+      CupertinoApp(
+        home: _FakeEditableText(),
+      ),
+    );
+    final _FakeEditableTextState editableTextState =
+        tester.state(find.byType(_FakeEditableText));
+    final List<ContextMenuButtonItem>? buttonItems =
+        CupertinoSpellCheckSuggestionsToolbar.buildButtonItems(editableTextState);
+
+    expect(buttonItems, isNotNull);
+    expect(buttonItems!.length, 1);
+    expect(buttonItems.first.label, 'No Replacements Found');
+  });
+}
+
+class _FakeEditableText extends EditableText {
+  _FakeEditableText() : super(
+    controller: TextEditingController(),
+    focusNode: FocusNode(),
+    backgroundCursorColor: CupertinoColors.white,
+    cursorColor: CupertinoColors.white,
+    style: const TextStyle(),
+  );
+
+  @override
+  _FakeEditableTextState createState() => _FakeEditableTextState();
+}
+
+class _FakeEditableTextState extends EditableTextState {
+  @override
+  TextEditingValue get currentTextEditingValue => TextEditingValue.empty;
+
+  @override
+  SuggestionSpan? findSuggestionSpanAtCursorIndex(int cursorIndex) {
+    return const SuggestionSpan(
+      TextRange(
+        start: 0,
+        end: 0,
+      ),
+      <String>[],
+    );
+  }
+}

packages/flutter/test/material/spell_check_suggestions_toolbar_test.dart

@@ -4,6 +4,7 @@
 
 import 'package:flutter/cupertino.dart' show CupertinoTextSelectionToolbar;
 import 'package:flutter/material.dart';
+import 'package:flutter/services.dart';
 import 'package:flutter_test/flutter_test.dart';
 
 // Vertical position at which to anchor the toolbar for testing.
@@ -85,4 +86,29 @@ void main() {
     final double toolbarY = tester.getTopLeft(findSpellCheckSuggestionsToolbar()).dy;
     expect(toolbarY, equals(expectedToolbarY));
   });
+
+  test('buildButtonItems builds only a delete button when no suggestions', () {
+    final _FakeEditableTextState editableTextState = _FakeEditableTextState();
+    final List<ContextMenuButtonItem>? buttonItems =
+        SpellCheckSuggestionsToolbar.buildButtonItems(editableTextState);
+
+    expect(buttonItems, hasLength(1));
+    expect(buttonItems!.first.type, ContextMenuButtonType.delete);
+  });
+}
+
+class _FakeEditableTextState extends EditableTextState {
+  @override
+  TextEditingValue get currentTextEditingValue => TextEditingValue.empty;
+
+  @override
+  SuggestionSpan? findSuggestionSpanAtCursorIndex(int cursorIndex) {
+    return const SuggestionSpan(
+      TextRange(
+        start: 0,
+        end: 0,
+      ),
+      <String>[],
+    );
+  }
 }