[iOS TextInput] Disables system keyboard for TextInputType.none

shell/platform/darwin/ios/framework/Source/FlutterTextInputPlugin.mm

@@ -55,6 +55,14 @@
 
 #pragma mark - Static Functions
 
+// "TextInputType.none" is a made-up input type that's typically
+// used when there's an in-app virtual keyboard. If
+// "TextInputType.none" is specified, disable the system
+// keyboard.
+static BOOL shouldShowSystemKeyboard(NSDictionary* type) {
+  NSString* inputType = type[@"name"];
+  return ![inputType isEqualToString:@"TextInputType.none"];
+}
 static UIKeyboardType ToUIKeyboardType(NSDictionary* type) {
   NSString* inputType = type[@"name"];
   if ([inputType isEqualToString:@"TextInputType.address"])
@@ -516,7 +524,12 @@ @implementation FlutterTextInputView {
   int _textInputClient;
   const char* _selectionAffinity;
   FlutterTextRange* _selectedTextRange;
+  UIInputViewController* _inputViewController;
   CGRect _cachedFirstRect;
+  // Whether to show the system keyboard when this view
+  // becomes the first responder. Typically set to false
+  // when the app shows its own in-flutter keyboard.
+  bool _isSystemKeyboardEnabled;
   bool _isFloatingCursorActive;
   // The view has reached end of life, and is no longer
   // allowed to access its textInputDelegate.
@@ -579,6 +592,8 @@ - (void)configureWithDictionary:(NSDictionary*)configuration {
   NSDictionary* autofill = configuration[kAutofillProperties];
 
   self.secureTextEntry = [configuration[kSecureTextEntry] boolValue];
+
+  _isSystemKeyboardEnabled = shouldShowSystemKeyboard(inputType);
   self.keyboardType = ToUIKeyboardType(inputType);
   self.returnKeyType = ToUIReturnKeyType(configuration[kInputAction]);
   self.autocapitalizationType = ToUITextAutoCapitalizationType(configuration);
@@ -625,6 +640,17 @@ - (UITextContentType)textContentType {
   return _textContentType;
 }
 
+- (UIInputViewController*)inputViewController {
+  if (_isSystemKeyboardEnabled) {
+    return nil;
+  }
+
+  if (!_inputViewController) {
+    _inputViewController = [UIInputViewController new];
+  }
+  return _inputViewController;
+}
+
 - (id<FlutterTextInputDelegate>)textInputDelegate {
   return _decommissioned ? nil : _textInputDelegate;
 }
@@ -649,6 +675,7 @@ - (void)dealloc {
   [_selectedTextRange release];
   [_tokenizer release];
   [_autofillId release];
+  [_inputViewController release];
   [super dealloc];
 }
 

shell/platform/darwin/ios/framework/Source/FlutterTextInputPluginTest.m

@@ -194,6 +194,20 @@ - (void)testKeyboardType {
   XCTAssertEqual(inputView.keyboardType, UIKeyboardTypeURL);
 }
 
+- (void)testSettingKeyboardTypeNoneDisablesSystemKeyboard {
+  NSDictionary* config = self.mutableTemplateCopy;
+  [config setValue:@{@"name" : @"TextInputType.none"} forKey:@"inputType"];
+  [self setClientId:123 configuration:config];
+
+  // Verify the view's inputViewController is not nil;
+  XCTAssertNotNil(textInputPlugin.activeView.inputViewController);
+
+  [config setValue:@{@"name" : @"TextInputType.url"} forKey:@"inputType"];
+  [self setClientId:124 configuration:config];
+  XCTAssertNotNil(textInputPlugin.activeView);
+  XCTAssertNil(textInputPlugin.activeView.inputViewController);
+}
+
 - (void)testAutocorrectionPromptRectAppears {
   FlutterTextInputView* inputView = [[FlutterTextInputView alloc] initWithFrame:CGRectZero];
   inputView.textInputDelegate = engine;