handleDelete method

void handleDelete(bool forward)

Implementation

void handleDelete(bool forward) {
  final selection = widget.controller.selection;
  final plainText = textEditingValue.text;
  int cursorPosition = selection.start;
  String textBefore = selection.textBefore(plainText);
  String textAfter = selection.textAfter(plainText);
  // If not deleting a selection, delete the next/previous character.
  if (selection.isCollapsed) {
    if (!forward && textBefore.isNotEmpty) {
      final int characterBoundary =
          previousCharacter(textBefore.length, textBefore);
      textBefore = textBefore.substring(0, characterBoundary);
      cursorPosition = characterBoundary;
    }
    // we don't want to remove the last new line
    if (forward && textAfter.isNotEmpty && textAfter != '\n') {
      final int deleteCount = nextCharacter(0, textAfter);
      textAfter = textAfter.substring(deleteCount);
    }
  }
  var newSelection = TextSelection.collapsed(offset: cursorPosition);
  var newText = textBefore + textAfter;
  var size = plainText.length - newText.length;
  widget.controller.replaceText(
    cursorPosition,
    size,
    '',
    selection: newSelection,
  );
}