handleNewLines static method

Implementation

static KeyEventResult handleNewLines(KeyEvent e, TextFieldState field) {
  if ((e.logicalKey == LogicalKeyboardKey.enter ||
          e.logicalKey == LogicalKeyboardKey.numpadEnter) &&
      e is KeyDownEvent) {
    final Set<PhysicalKeyboardKey> pressed =
        HardwareKeyboard.instance.physicalKeysPressed;

    final bool isShiftPressed = pressed.any(
      (key) =>
          key == PhysicalKeyboardKey.shiftLeft ||
          key == PhysicalKeyboardKey.shiftRight,
    );
    final bool isAltPressed = pressed.any(
      (key) =>
          key == PhysicalKeyboardKey.altLeft ||
          key == PhysicalKeyboardKey.altRight,
    );
    final bool isControlPressed = pressed.any(
      (key) =>
          key == PhysicalKeyboardKey.controlLeft ||
          key == PhysicalKeyboardKey.controlRight,
    );
    final bool isMetaPressed = pressed.any(
      (key) =>
          key == PhysicalKeyboardKey.metaLeft ||
          key == PhysicalKeyboardKey.metaRight,
    );

    bool handled = isShiftPressed;

    if (!PlatformUtils.isWeb) {
      if (PlatformUtils.isMacOS || PlatformUtils.isWindows) {
        handled = handled || isAltPressed || isControlPressed;
      }
    }

    if (!handled) {
      if (isAltPressed ||
          isControlPressed ||
          isMetaPressed ||
          isShiftPressed) {
        int cursor;

        if (field.controller.selection.isCollapsed) {
          cursor = field.controller.selection.base.offset;
          field.text =
              '${field.text.substring(0, cursor)}\n${field.text.substring(cursor, field.text.length)}';
        } else {
          cursor = field.controller.selection.start;
          field.text =
              '${field.text.substring(0, field.controller.selection.start)}\n${field.text.substring(field.controller.selection.end, field.text.length)}';
        }

        field.controller.selection = TextSelection.fromPosition(
          TextPosition(offset: cursor + 1),
        );
      } else {
        field.submit();
        return KeyEventResult.handled;
      }
    }
  }

  return KeyEventResult.ignored;
}