Function setCellHelper

packages/joint-react/src/hooks/use-update-element.ts:22–47

* Helper function. * Parameters - [graph, id, attribute, value] * @param graph - The graph to set the element in. * @param id - The ID of the element to set. * @param attribute - The attribute to set. * @param value - The value to set.

(
  graph: dia.Graph,
  id: dia.Cell.ID,
  attribute: Attribute,
  value: unknown
)

 * @param value - The value to set.
 */
function setCellHelper<Attributes, Attribute extends keyof Attributes>(
  graph: dia.Graph,
  id: dia.Cell.ID,
  attribute: Attribute,
  value: unknown
) {
  const stringAttribute = attribute as string;
  const element = graph.getCell(id);

  if (!element) {
    return;
  }
  if (isSetter(value)) {
    const previousValue: Attributes[Attribute] = element.get(stringAttribute);
    const nextValue = value(previousValue);
    if (nextValue === previousValue) {
      // skip if the reference is same, same as react state does
      return;
    }

    element.set(stringAttribute, nextValue);
    return;
  }

  element.set(stringAttribute, value);
}

/**
 * Set the element attribute in the graph.