ios text input plugin ignores selection calls when interactive selection is disabled

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

@@ -52,6 +52,7 @@
 static NSString* const kKeyboardAppearance = @"keyboardAppearance";
 static NSString* const kInputAction = @"inputAction";
 static NSString* const kEnableDeltaModel = @"enableDeltaModel";
+static NSString* const kEnableInteractiveSelection = @"enableInteractiveSelection";
 
 static NSString* const kSmartDashesType = @"smartDashesType";
 static NSString* const kSmartQuotesType = @"smartQuotesType";
@@ -732,6 +733,7 @@ @implementation FlutterTextInputView {
   // The view has reached end of life, and is no longer
   // allowed to access its textInputDelegate.
   BOOL _decommissioned;
+  bool _enableInteractiveSelection;
 }
 
 @synthesize tokenizer = _tokenizer;
@@ -765,6 +767,7 @@ - (instancetype)initWithOwner:(FlutterTextInputPlugin*)textInputPlugin {
     _returnKeyType = UIReturnKeyDone;
     _secureTextEntry = NO;
     _enableDeltaModel = NO;
+    _enableInteractiveSelection = YES;
     _accessibilityEnabled = NO;
     _decommissioned = NO;
     if (@available(iOS 11.0, *)) {
@@ -796,7 +799,7 @@ - (void)configureWithDictionary:(NSDictionary*)configuration {
   self.keyboardType = ToUIKeyboardType(inputType);
   self.returnKeyType = ToUIReturnKeyType(configuration[kInputAction]);
   self.autocapitalizationType = ToUITextAutoCapitalizationType(configuration);
-
+  _enableInteractiveSelection = [configuration[kEnableInteractiveSelection] boolValue];
   if (@available(iOS 11.0, *)) {
     NSString* smartDashesType = configuration[kSmartDashesType];
     // This index comes from the SmartDashesType enum in the framework.
@@ -1115,6 +1118,10 @@ - (void)setSelectedTextRangeLocal:(UITextRange*)selectedTextRange {
 }
 
 - (void)setSelectedTextRange:(UITextRange*)selectedTextRange {
+  if (!_enableInteractiveSelection) {
+    return;
+  }
+
   [self setSelectedTextRangeLocal:selectedTextRange];
 
   if (_enableDeltaModel) {
@@ -1740,7 +1747,6 @@ - (void)updateEditingState {
     composingBase = ((FlutterTextPosition*)self.markedTextRange.start).index;
     composingExtent = ((FlutterTextPosition*)self.markedTextRange.end).index;
   }
-
   NSDictionary* state = @{
     @"selectionBase" : @(selectionBase),
     @"selectionExtent" : @(selectionExtent),

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

@@ -25,7 +25,7 @@ - (void)setMarkedRect:(CGRect)markedRect;
 - (void)updateEditingState;
 - (BOOL)isVisibleToAutofill;
 - (id<FlutterTextInputDelegate>)textInputDelegate;
-
+- (void)configureWithDictionary:(NSDictionary*)configuration;
 @end
 
 @interface FlutterTextInputViewSpy : FlutterTextInputView
@@ -139,7 +139,8 @@ - (NSMutableDictionary*)mutableTemplateCopy {
       @"inputAction" : @"TextInputAction.unspecified",
       @"smartDashesType" : @"0",
       @"smartQuotesType" : @"0",
-      @"autocorrect" : @YES
+      @"autocorrect" : @YES,
+      @"enableInteractiveSelection" : @YES,
     };
   }
 
@@ -269,6 +270,34 @@ - (void)testAutocorrectionPromptRectAppears {
                                 withClient:0]);
 }
 
+- (void)testIngoresSelectionChangeIfSelectionIsDisabled {
+  FlutterTextInputView* inputView = [[FlutterTextInputView alloc] initWithOwner:textInputPlugin];
+  __block int updateCount = 0;
+  OCMStub([engine flutterTextInputView:inputView updateEditingClient:0 withState:[OCMArg isNotNil]])
+      .andDo(^(NSInvocation* invocation) {
+        updateCount++;
+      });
+
+  [inputView.text setString:@"Some initial text"];
+  XCTAssertEqual(updateCount, 0);
+
+  FlutterTextRange* textRange = [FlutterTextRange rangeWithNSRange:NSMakeRange(0, 1)];
+  [inputView setSelectedTextRange:textRange];
+  XCTAssertEqual(updateCount, 1);
+
+  // Disable the interactive selection.
+  NSDictionary* config = self.mutableTemplateCopy;
+  [config setValue:@(NO) forKey:@"enableInteractiveSelection"];
+  [config setValue:@(NO) forKey:@"obscureText"];
+  [config setValue:@(NO) forKey:@"enableDeltaModel"];
+  [inputView configureWithDictionary:config];
+
+  textRange = [FlutterTextRange rangeWithNSRange:NSMakeRange(2, 3)];
+  [inputView setSelectedTextRange:textRange];
+  // The update count does not change.
+  XCTAssertEqual(updateCount, 1);
+}
+
 - (void)testAutocorrectionPromptRectDoesNotAppearDuringScribble {
   if (@available(iOS 14.0, *)) {
     FlutterTextInputView* inputView = [[FlutterTextInputView alloc] initWithOwner:textInputPlugin];