map method

void map(DOMNode domNode, T element, { DOMContext<T>? context, bool allowOverwrite = false, })

Maps in this instance the pair domNode and element.

Implementation

void map(DOMNode domNode, T element,
    {DOMContext<T>? context, bool allowOverwrite = false}) {
  if (element == null) return;

  var prevElement = _domNodeToElementMap[domNode];
  var prevDomNode = _elementToDOMNodeMap[element];

  if (prevElement != null || prevDomNode != null) {
    var samePrevElement = identical(prevElement, element);
    var samePrevDomNode = identical(prevDomNode, domNode);
    if (samePrevElement && samePrevDomNode) {
      return;
    } else {
      if (!allowOverwrite) {
        print(
            'WARNING> Mapping to different instances: $prevElement ; $prevDomNode');
      }
    }
  }

  _domNodeToElementMap[domNode] = element;
  _elementToDOMNodeMap[element] = domNode;

  domNode.treeMap = this;
  _elementsDOMTreeMap[element] = this;

  if (domNode is DOMElement) {
    domGenerator.resolveActionAttribute(this, domNode, element, context);
    domGenerator.registerEventListeners(this, domNode, element, context);
  }
}