Initial support for input language restoration

Source/ASEditableTextNode.h

@@ -140,8 +140,9 @@ NS_ASSUME_NONNULL_BEGIN
 @property (nonatomic) BOOL enablesReturnKeyAutomatically;                  // default is NO (when YES, will automatically disable return key when text widget has zero-length contents, and will automatically enable when text widget has non-zero-length contents)
 @property (nonatomic, getter=isSecureTextEntry) BOOL secureTextEntry;      // default is NO
 
-- (void)dropAutocorrection;
+@property (nonatomic, strong) NSString * _Nullable initialPrimaryLanguage;
 
+- (void)dropAutocorrection;
 
 @end
 

Source/ASEditableTextNode.mm

@@ -83,6 +83,7 @@
 @interface ASPanningOverriddenUITextView : ASTextKitComponentsTextView
 {
   BOOL _shouldBlockPanGesture;
+  BOOL _initializedPrimaryInputLanguage;
 }
 
 @property (nonatomic, copy) bool (^shouldPaste)();
@@ -90,6 +91,8 @@
 @property (nonatomic, copy) bool (^shouldReturn)();
 @property (nonatomic, copy) void (^backspaceWhileEmpty)();
 
+@property (nonatomic, strong) NSString * _Nullable initialPrimaryLanguage;
+
 @end
 
 @implementation ASPanningOverriddenUITextView
@@ -190,6 +193,21 @@
   }
 }
 
+- (UITextInputMode *)textInputMode {
+  if (!_initializedPrimaryInputLanguage) {
+    _initializedPrimaryInputLanguage = true;
+      /*if (_initialPrimaryLanguage != nil) {
+      for (UITextInputMode *inputMode in [UITextInputMode activeInputModes]) {
+        NSString *primaryLanguage = inputMode.primaryLanguage;
+        if (primaryLanguage != nil && [primaryLanguage isEqualToString:_initialPrimaryLanguage]) {
+          return inputMode;
+        }
+      }*/
+    }
+  }
+  return [super textInputMode];
+}
+
 #endif
 
 - (BOOL)gestureRecognizerShouldBegin:(UIGestureRecognizer *)gestureRecognizer
@@ -316,6 +334,7 @@
 
   // Create and configure our text view.
   ASPanningOverriddenUITextView *textView = [[ASPanningOverriddenUITextView alloc] initWithFrame:CGRectZero textContainer:_textKitComponents.textContainer];
+  textView.initialPrimaryLanguage = _initialPrimaryLanguage;
   __weak ASEditableTextNode *weakSelf = self;
   textView.shouldPaste = ^bool{
     __strong ASEditableTextNode *strongSelf = weakSelf;