of static method

LocalizationManager of(BuildContext? context)

Provides access to the nearest LocalizationManager up the widget tree.

Throws FlutterError if no LocalizationProvider is found in the widget tree, ensuring that usage of the localization functionalities cannot proceed without a properly configured provider.

context The build context which will be used to look up the LocalizationProvider. Retrieves the LocalizationManager instance associated with the nearest LocalizationProvider up the widget tree.

This static method tries to obtain a LocalizationProvider from the widget tree starting from the provided context. If context is null, it defaults to the current context held by instanceKey. If the LocalizationProvider is not found, a FlutterError is thrown.

Parameters:

• context BuildContext?: Optional. The context from which to start looking for the LocalizationProvider. If null, the method uses a default context from instanceKey.

Returns:

• LocalizationManager: The LocalizationManager provided by the found LocalizationProvider.

Throws:

• FlutterError: If no LocalizationProvider is found either in the given context or the default context.

Implementation

static LocalizationManager of(BuildContext? context) {
  final LocalizationProvider? result;

  // Check for LocalizationProvider starting from the provided context or default context.
  if (context != null) {
    result =
        context.dependOnInheritedWidgetOfExactType<LocalizationProvider>();
  } else {
    result = instanceKey.currentContext
        ?.dependOnInheritedWidgetOfExactType<LocalizationProvider>();
  }

  // If no LocalizationProvider is found, throw an error.
  if (result == null) {
    throw FlutterError('LocalizationProvider not found in context');
  }

  // Return the LocalizationManager from the found LocalizationProvider.
  return result._localizationManager;
}