Function findControlFlowBlocks

packages/core/src/render3/util/control_flow.ts:223–260

* Finds all the control flow blocks inside a specific node and view. * * @param node Node in which to search for blocks. * @param lView View within the node in which to search for blocks. * @param results (Optional) Array to which to add blocks once they're found. * @returns Found control flow

(
  node: Node,
  lView: LView,
  results: ControlFlowBlock[] = [],
)

 * @returns Found control flow blocks results array.
 */
function findControlFlowBlocks(
  node: Node,
  lView: LView,
  results: ControlFlowBlock[] = [],
): ControlFlowBlock[] {
  const tView = lView[TVIEW];

  for (let i = HEADER_OFFSET; i < tView.bindingStartIndex; i++) {
    const slot = lView[i];

    for (const finder of CONTROL_FLOW_BLOCK_FINDERS) {
      const block = finder({node, lView, tView, slotIdx: i});
      if (block) {
        results.push(block);
        break;
      }
    }

    if (isLContainer(slot)) {
      const lContainer = slot;

      // The host can be an `LView` if this is the container
      // for a component that injects `ViewContainerRef`.
      if (isLView(lContainer[HOST])) {
        findControlFlowBlocks(node, lContainer[HOST], results);
      }

      for (let j = CONTAINER_HEADER_OFFSET; j < lContainer.length; j++) {
        findControlFlowBlocks(node, lContainer[j], results);
      }
    } else if (isLView(slot)) {
      // This is a component, enter the `findControlFlowBlocks` recursively.
      findControlFlowBlocks(node, slot, results);
    }
  }

  return results;
}

/**
 * Turns the `DeferBlockState` into a string which is more readable than the enum form.