updateEditingValue method

@override void updateEditingValue(TextEditingValue value)

Requests that this client update its editing state to the given value.

The new value is treated as user input and thus may subject to input formatting.

Implementation

@override
void updateEditingValue(TextEditingValue value) {
  _editing = value;
  final composing = value.composing;
  if (composing.isValid && !composing.isCollapsed) {
    _composing = true;
    onPreeditChanged(composing.textInside(value.text));
    return;
  }
  _composing = false;
  onPreeditChanged(null);

  final baseline = kImeDeleteDetectionBaseline.text;
  if (value.text.length < baseline.length) {
    if (value.text.isNotEmpty && baseline.startsWith(value.text)) {
      onBackspace();
    } else if (value.text.isNotEmpty) {
      // Some IMEs commit without the sentinel prefix (e.g. lone CJK).
      onCommit(value.text);
    }
    _resetEditing(notify: false);
    return;
  }

  if (value.text.length > baseline.length) {
    final delta = value.text.substring(baseline.length);
    if (delta.isNotEmpty) onCommit(delta);
    _resetEditing(notify: false);
    return;
  }

  if (value.text.isNotEmpty && value.text != baseline) {
    onCommit(value.text);
    _resetEditing(notify: false);
  }
}