insertText method

void insertText(String value)

Inserts a string at the current cursor position of the active text field. If text selection is active, replaces the selected range.

Implementation

void insertText(String value) {
  final field = _focusedField;
  if (field == null) return;
  final controller = controllers[field];
  if (controller == null) return;

  final currentText = controller.text;
  final selection = controller.selection;

  int start = selection.start;
  int end = selection.end;

  // Fallback if cursor position is not set/invalid
  if (start < 0 || end < 0) {
    start = currentText.length;
    end = currentText.length;
  }

  final newText = currentText.replaceRange(start, end, value);
  final newCursorPosition = start + value.length;

  controller.value = TextEditingValue(
    text: newText,
    selection: TextSelection.collapsed(offset: newCursorPosition),
  );
  notifyListeners();
}