@angular/core
Version:
Angular - the core framework
63 lines • 9.66 kB
JavaScript
/**
* @license
* Copyright Google LLC All Rights Reserved.
*
* Use of this source code is governed by an MIT-style license that can be
* found in the LICENSE file at https://angular.io/license
*/
import { assertParentView } from './assert';
import { icuContainerIterate } from './i18n/i18n_tree_shaking';
import { CONTAINER_HEADER_OFFSET } from './interfaces/container';
import { isLContainer } from './interfaces/type_checks';
import { DECLARATION_COMPONENT_VIEW, TVIEW } from './interfaces/view';
import { assertTNodeType } from './node_assert';
import { getProjectionNodes } from './node_manipulation';
import { getLViewParent } from './util/view_traversal_utils';
import { unwrapRNode } from './util/view_utils';
export function collectNativeNodes(tView, lView, tNode, result, isProjection = false) {
while (tNode !== null) {
ngDevMode &&
assertTNodeType(tNode, 3 /* AnyRNode */ | 12 /* AnyContainer */ | 16 /* Projection */ | 32 /* Icu */);
const lNode = lView[tNode.index];
if (lNode !== null) {
result.push(unwrapRNode(lNode));
}
// A given lNode can represent either a native node or a LContainer (when it is a host of a
// ViewContainerRef). When we find a LContainer we need to descend into it to collect root nodes
// from the views in this container.
if (isLContainer(lNode)) {
for (let i = CONTAINER_HEADER_OFFSET; i < lNode.length; i++) {
const lViewInAContainer = lNode[i];
const lViewFirstChildTNode = lViewInAContainer[TVIEW].firstChild;
if (lViewFirstChildTNode !== null) {
collectNativeNodes(lViewInAContainer[TVIEW], lViewInAContainer, lViewFirstChildTNode, result);
}
}
}
const tNodeType = tNode.type;
if (tNodeType & 8 /* ElementContainer */) {
collectNativeNodes(tView, lView, tNode.child, result);
}
else if (tNodeType & 32 /* Icu */) {
const nextRNode = icuContainerIterate(tNode, lView);
let rNode;
while (rNode = nextRNode()) {
result.push(rNode);
}
}
else if (tNodeType & 16 /* Projection */) {
const nodesInSlot = getProjectionNodes(lView, tNode);
if (Array.isArray(nodesInSlot)) {
result.push(...nodesInSlot);
}
else {
const parentView = getLViewParent(lView[DECLARATION_COMPONENT_VIEW]);
ngDevMode && assertParentView(parentView);
collectNativeNodes(parentView[TVIEW], parentView, nodesInSlot, result, true);
}
}
tNode = isProjection ? tNode.projectionNext : tNode.next;
}
return result;
}
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