Function dispatchHover

src/ink/hit-test.ts:102–130

(
  root: DOMElement,
  col: number,
  row: number,
  hovered: Set<DOMElement>,
)

 * non-rendered gap or off the root rect).
 */
export function dispatchHover(
  root: DOMElement,
  col: number,
  row: number,
  hovered: Set<DOMElement>,
): void {
  const next = new Set<DOMElement>()
  let node: DOMElement | undefined = hitTest(root, col, row) ?? undefined
  while (node) {
    const h = node._eventHandlers as EventHandlerProps | undefined
    if (h?.onMouseEnter || h?.onMouseLeave) next.add(node)
    node = node.parentNode
  }
  for (const old of hovered) {
    if (!next.has(old)) {
      hovered.delete(old)
      // Skip handlers on detached nodes (removed between mouse events)
      if (old.parentNode) {
        ;(old._eventHandlers as EventHandlerProps | undefined)?.onMouseLeave?.()
      }
    }
  }
  for (const n of next) {
    if (!hovered.has(n)) {
      hovered.add(n)
      ;(n._eventHandlers as EventHandlerProps | undefined)?.onMouseEnter?.()
    }
  }
}