onGetNodeForLocation method

void onGetNodeForLocation(int? id, Map<String, dynamic> params)

Implementation

void onGetNodeForLocation(int? id, Map<String, dynamic> params) {
  int x = params['x'];
  int y = params['y'];

  RenderBox rootRenderObject = document.renderer!;
  BoxHitTestResult result = BoxHitTestResult();
  rootRenderObject.hitTest(result, position: Offset(x.toDouble(), y.toDouble()));
  var hitPath = result.path;
  if (hitPath.isEmpty) {
    sendToFrontend(id, null);
    return;
  }
  // find real img element.
  if (hitPath.first.target is WebFRenderImage ||
        (hitPath.first.target is RenderSVGRoot &&
        (hitPath.first.target as RenderBoxModel).renderStyle.target.pointer == null)) {
    hitPath = hitPath.skip(1);
  }
  if (hitPath.isNotEmpty && hitPath.first.target is RenderBoxModel) {
    RenderBoxModel lastHitRenderBoxModel = result.path.first.target as RenderBoxModel;
    int? targetId = view.forDevtoolsNodeId(lastHitRenderBoxModel.renderStyle.target);
    sendToFrontend(
        id,
        JSONEncodableMap({
          'backendId': targetId,
          'frameId': DEFAULT_FRAME_ID,
          'nodeId': targetId,
        }));
  } else {
    sendToFrontend(id, null);
  }
}