Function trySerializeI18nBlock

packages/core/src/hydration/i18n.ts:178–210

(
  lView: LView,
  index: number,
  context: HydrationContext,
)

 * @returns the i18n data, or null if there is no relevant data
 */
export function trySerializeI18nBlock(
  lView: LView,
  index: number,
  context: HydrationContext,
): SerializedI18nBlock | null {
  if (!context.isI18nHydrationEnabled) {
    return null;
  }

  const tView = lView[TVIEW];
  const tI18n = tView.data[index] as TI18n | undefined;
  if (!tI18n || !tI18n.ast) {
    return null;
  }

  const parentTNode = tView.data[tI18n.parentTNodeIndex] as TNode;
  if (parentTNode && isI18nInSkipHydrationBlock(parentTNode)) {
    return null;
  }

  const serializedI18nBlock: SerializedI18nBlock = {
    caseQueue: [],
    disconnectedNodes: new Set(),
    disjointNodes: new Set(),
  };
  serializeI18nBlock(lView, serializedI18nBlock, context, tI18n.ast);

  return serializedI18nBlock.caseQueue.length === 0 &&
    serializedI18nBlock.disconnectedNodes.size === 0 &&
    serializedI18nBlock.disjointNodes.size === 0
    ? null
    : serializedI18nBlock;
}

function serializeI18nBlock(
  lView: LView,