Function collectNativeNodes

packages/core/src/render3/collect_native_nodes.ts:28–110

(
  tView: TView,
  lView: LView,
  tNode: TNode | null,
  result: any[],
  isProjection: boolean = false,
)

import {getLViewParent, unwrapRNode} from './util/view_utils';

export function collectNativeNodes(
  tView: TView,
  lView: LView,
  tNode: TNode | null,
  result: any[],
  isProjection: boolean = false,
): any[] {
  if (tView.type === TViewType.Foreign) {
    const headTNode = tView.firstChild!;
    const tailTNode = headTNode.next!;
    const head = unwrapRNode(lView[headTNode.index]);
    const tail = unwrapRNode(lView[tailTNode.index]);

    let current: RNode | null = head;
    while (current !== null) {
      result.push(current);
      if (current === tail) break;
      current = current.nextSibling;
    }
    return result;
  }

  while (tNode !== null) {
    // Let declarations don't have corresponding DOM nodes so we skip over them.
    if (tNode.type === TNodeType.LetDeclaration) {
      tNode = isProjection ? tNode.projectionNext : tNode.next;
      continue;
    }

    ngDevMode &&
      assertTNodeType(
        tNode,
        TNodeType.AnyRNode | TNodeType.AnyContainer | TNodeType.Projection | TNodeType.Icu,
      );

    const lNode = lView[tNode.index];
    if (lNode !== null) {
      if (isLContainer(lNode)) {
        const anchor = lNode[NATIVE];
        // If this is a dynamic container (ViewContainerRef on an element), the HOST element is a
        // distinct element node and must be pushed first (before the views are collected) to
        // preserve DOM order.
        if (anchor !== lNode[HOST]) {
          result.push(unwrapRNode(lNode));
        }

        // Collect the root nodes from the views in this container.
        if (!(lNode[FLAGS] & LContainerFlags.LogicalOnly)) {
          collectNativeNodesInLContainer(lNode, result);
        }

        // The container's anchor comment node is always physically positioned after any views
        // rendered inside the container, so we always push it here at the end.
        result.push(anchor);
      } else {
        result.push(unwrapRNode(lNode));
      }
    }