build method

@override Widget build()

Subclasses should override this function to actually call the appropriate build function (e.g., StatelessWidget.build or State.build) for their widget.

Implementation

@override
Widget build() {
  // Check whether we can cancel the rebuild (caused by HookState.mayNeedRebuild).
  final bool mustRebuild =
      (_rebuildRequired ?? true) || _shouldRebuildQueue.any((cb) => cb.value());

  _rebuildRequired = null;
  _shouldRebuildQueue.clear();

  if (!mustRebuild && _buildCache != null) {
    return _buildCache!;
  }

  assert(!(Hook._debugInitializing = false));

  _currentEntry = _hooks.firstOrNull;
  _current = this;
  try {
    _buildCache = super.build();
  } finally {
    _rebuildRequired = null;
    _debugDidReassemble = false;
    _unmountAllRemainingHooks();
    _current = null;
    if (_needDispose != null && _needDispose!.isNotEmpty) {
      for (
        _Entry<Hook<Object?, Object?>>? toDispose = _needDispose!.last;
        toDispose != null;
        toDispose = toDispose.previous
      ) {
        toDispose.value.dispose();
      }
      _needDispose = null;
    }
  }

  return _buildCache!;
}