fix: Square payment SDK integration

cspell.json

@@ -149,7 +149,8 @@
     "componentregistry",
     "mapbuffer",
     "nativemodule",
-    "reactnative"
+    "reactnative",
+    "SQIP"
   ],
   "ignorePaths": [
     "node_modules",

ios/delegates/KCTextInputCompositeDelegate.swift

@@ -65,7 +65,7 @@ class KCTextInputCompositeDelegate: NSObject, UITextViewDelegate, UITextFieldDel
   // MARK: setters/getters
 
   public func setTextViewDelegate(delegate: UITextViewDelegate?) {
-    // remove KVO from any old textField
+    // remove KVO from any old textView
     if let oldTextField = observedTextFieldForSelection {
       removeSelectionRangeObserver(from: oldTextField)
     }
@@ -96,6 +96,21 @@ class KCTextInputCompositeDelegate: NSObject, UITextViewDelegate, UITextFieldDel
     }
   }
 
+  public func canSubstituteTextFieldDelegate(delegate: UITextFieldDelegate?) -> Bool {
+    let type = String(describing: delegate)
+    if type.range(of: "SQIPTextFieldInputModifier") != nil {
+      // SQIPTextFieldInputModifier is a private class used internally by Square.
+      // It forwards input events to the keyboard-controller delegate.
+      // To prevent an infinite loop, we avoid setting our delegate in this case.
+      // Since Square's SDK is used imperatively and doesn't allow adding custom components,
+      // keyboard-controller components cannot be used in this context,
+      // so it's safe to skip replacing the delegate.
+      return false
+    }
+
+    return true
+  }
+
   // Getter for the active delegate
   public var activeDelegate: AnyObject? {
     return textViewDelegate ?? textFieldDelegate

ios/observers/FocusedInputObserver.swift

@@ -228,7 +228,9 @@ public class FocusedInputObserver: NSObject {
 
   private func substituteDelegate(_ input: UIResponder?) {
     if let textField = input as? UITextField {
-      if !(textField.delegate is KCTextInputCompositeDelegate) {
+      if !(textField.delegate is KCTextInputCompositeDelegate),
+         delegate.canSubstituteTextFieldDelegate(delegate: textField.delegate)
+      {
         delegate.setTextFieldDelegate(delegate: textField.delegate, textField: textField)
         textField.delegate = delegate
       }