fix(ios): typing attributes clearing on keystrokes

.maestro/enrichedInput/flows/preserve_typing_attributes_on_selection_change.yaml

@@ -0,0 +1,34 @@
+appId: swmansion.enriched.example
+---
+# Verifies that typing attributes are properly preserved on selection changes
+- launchApp
+
+- tapOn:
+    id: 'toggle-screen-button'
+
+- tapOn:
+    id: "editor-input"
+
+- tapOn:
+    id: "toolbar-bold"
+
+- inputText: 'bold text'
+- pressKey: Enter
+- pressKey: Enter
+- pressKey: Enter
+- inputText: 'another line'
+
+- doubleTapOn:
+    id: 'editor-input'
+    point: '20%, 75%'
+
+- tapOn:
+    id: 'editor-input'
+    point: '50%, 15%'
+
+- inputText: 'new'
+
+- runFlow:
+    file: '../subflows/capture_or_assert_screenshot.yaml'
+    env:
+      SCREENSHOT_NAME: 'preserve_typing_attributes_on_selection_changes'

ios/EnrichedTextInputView.mm

@@ -2000,6 +2000,14 @@ - (bool)textView:(UITextView *)textView
     return NO;
   }
 
+  // To be sure, we re-run typingAttributes management right before the
+  // character actually lands. Sometimes, between a selection change and the
+  // next keystroke, typing attributes might get removed - this seems like a
+  // native TextKit issue.
+  if (textView.markedTextRange == nil && text.length > 0) {
+    [attributesManager repeatRecentTypingAttributesManagement];
+  }
+
   return YES;
 }
 

ios/inputAttributesManager/InputAttributesManager.h

@@ -13,6 +13,7 @@
 - (void)didRemoveTypingAttribute:(NSString *)key;
 - (void)clearRemovedTypingAttributes;
 - (void)manageTypingAttributesWithOnlySelection:(BOOL)onlySelectionChanged;
+- (void)repeatRecentTypingAttributesManagement;
 - (void)handleDirtyRangesStyling;
 - (NSSet<NSString *> *)customAttributesKeys;
 @end

ios/inputAttributesManager/InputAttributesManager.mm

@@ -11,13 +11,15 @@ @implementation InputAttributesManager {
   NSMutableArray<NSValue *> *_dirtyRanges;
   NSSet *_customAttributesKeys;
   NSMutableSet *_removedTypingAttributes;
+  BOOL _recentOnlySelectionStatus;
 }
 
 - (instancetype)initWithInput:(EnrichedTextInputView *)input {
   self = [super init];
   _input = input;
   _dirtyRanges = [[NSMutableArray alloc] init];
   _removedTypingAttributes = [[NSMutableSet alloc] init];
+  _recentOnlySelectionStatus = NO;
 
   // setup customAttributes
   NSMutableSet *_customAttrsSet = [[NSMutableSet alloc] init];
@@ -129,6 +131,7 @@ - (void)handleDirtyRangesStyling {
 }
 
 - (void)manageTypingAttributesWithOnlySelection:(BOOL)onlySelectionChanged {
+  _recentOnlySelectionStatus = onlySelectionChanged;
   EnrichedInputTextView *textView = _input->textView;
   NSRange selectedRange = textView.selectedRange;
 
@@ -219,4 +222,8 @@ - (void)manageTypingAttributesWithOnlySelection:(BOOL)onlySelectionChanged {
   textView.typingAttributes = newAttrs;
 }
 
+- (void)repeatRecentTypingAttributesManagement {
+  [self manageTypingAttributesWithOnlySelection:_recentOnlySelectionStatus];
+}
+
 @end