mainAxisSize method

@preferInline MainAxisSize? mainAxisSize({ String key = FlutterPropertyKeys.mainAxisSize, MainAxisSize? defaultValue, Object? target, bool warmUp = false, })

Retrieves a MainAxisSize value from the JSON map for the given key.

Looks up the value associated with key in the JSON. If the value is already a MainAxisSize, it is returned as is. If the value is a String or int, it is converted using the lookup tables. Otherwise, it returns defaultValue.

• key: The key to look up in the JSON map. Defaults to 'mainAxisSize'.
• defaultValue: The value to return if the key is not found or cannot be resolved. Defaults to null.

Returns:

• A MainAxisSize if the value is valid or can be parsed.
• defaultValue if the value is not a valid MainAxisSize or cannot be parsed.
• null if both the value and defaultValue are null.

Implementation

@preferInline
MainAxisSize? mainAxisSize({
  String key = FlutterPropertyKeys.mainAxisSize,
  MainAxisSize? defaultValue,
  Object? target,
  bool warmUp = false,
}) {
  final value = _readProp(key, target, warmUp);

  if (value is MainAxisSize) return value;

  if (value == null) return defaultValue;

  switch (value) {
    case String():
      if (envAttributeWarmUpEnabled) {
        if (warmUp) {
          return _mainAxisSizeStringLookupTable[value];
        } else {
          return _json[key] = _mainAxisSizeStringLookupTable[value];
        }
      } else {
        return _json[key] = _mainAxisSizeStringLookupTable[value];
      }
    case int():
      if (envAttributeWarmUpEnabled) {
        if (warmUp) {
          return _mainAxisSizeIntLookupTable[value];
        } else {
          return _json[key] = _mainAxisSizeIntLookupTable[value];
        }
      } else {
        return _json[key] = _mainAxisSizeIntLookupTable[value];
      }
    default:
      return defaultValue;
  }
}