fix: incorrect selection coordinates when input grows

📜 Description

Fixed incorrect selection coordinates when text gets moved to a new line and text input grows.

💡 Motivation and Context

The problem happens because our text is bigger and can not fit into current layout. If we read coordinates we get +Inf and of course it's not reasonable to send such events to JS.

To fix this problem we need to wait for layout update (next frame) and send event only after that. This is exactly what i did in this PR:

if textView.canSelectionFitIntoLayout {
  updateSelectionPosition(textInput: textView, sendEvent: onSelectionChange)
} else {
  // when multiline input grows we need to wait for layout to be updated
  // otherwise start/end positions will be incorrect (0/-1)
  DispatchQueue.main.asyncAfter(deadline: .now() + UIUtils.nextFrame) {
    updateSelectionPosition(textInput: textView, sendEvent: self.onSelectionChange)
  }
}

Closes https://github.com/kirillzyusko/react-native-keyboard-controller/issues/489

📢 Changelog

iOS

added canSelectionFitIntoLayout property extension to UITextInput;
use canSelectionFitIntoLayout to detect whether we can send event immediately or need to wait for one frmae for layout to be updated and send event only after that;

🤔 How Has This Been Tested?

Tested manually using code sample provided in the issue.

📸 Screenshots (if appropriate):

Before	After

📝 Checklist

[x] CI successfully passed
[x] I added new mocks and corresponding unit-tests if library API was changed

kirillzyusko / react-native-keyboard-controller

fix: incorrect selection coordinates when input grows #491