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fix(core): properly get root nodes from embedded views with <ng-content> (#36051)

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This commit fixes 2 separate issues related to root nodes retrieval from
embedded views with `<ng-content>`:

1) we did not account for the case where there were no projectable nodes
for a given `<ng-content>`;

2) we did not account for the case where projectable nodes for a given
`<ng-content>` were represented as an array of native nodes (happens in
the case of dynamically created components with projectable nodes);

Fixes #35967

PR Close #36051
This commit is contained in:
Pawel Kozlowski
2020-03-13 12:07:47 +01:00
committed by Alex Rickabaugh
parent 4573a9997b
commit a576852ad9
3 changed files with 123 additions and 16 deletions
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22
packages/core/src/render3/component_ref.ts
View File

@ -26,7 +26,7 @@ import {getComponentDef} from './definition';
import {NodeInjector} from './di';
import {assignTViewNodeToLView, createLView, createTView, elementCreate, locateHostElement, renderView} from './instructions/shared';
import {ComponentDef} from './interfaces/definition';
import {TContainerNode, TElementContainerNode, TElementNode} from './interfaces/node';
import {TContainerNode, TElementContainerNode, TElementNode, TNode} from './interfaces/node';
import {domRendererFactory3, RendererFactory3, RNode} from './interfaces/renderer';
import {LView, LViewFlags, TVIEW, TViewType} from './interfaces/view';
import {MATH_ML_NAMESPACE, SVG_NAMESPACE} from './namespaces';
@ -201,15 +201,19 @@ export class ComponentFactory<T> extends viewEngine_ComponentFactory<T> {
}
}
tElementNode = getTNode(rootLView[TVIEW], 0) as TElementNode;
tElementNode = getTNode(rootTView, 0) as TElementNode;
if (projectableNodes) {
// projectable nodes can be passed as array of arrays or an array of iterables (ngUpgrade
// case). Here we do normalize passed data structure to be an array of arrays to avoid
// complex checks down the line.
tElementNode.projection = projectableNodes.map((nodesforSlot: RNode[]) => {
return Array.from(nodesforSlot);
});
if (projectableNodes !== undefined) {
const projection: (TNode|RNode[]|null)[] = tElementNode.projection = [];
for (let i = 0; i < this.ngContentSelectors.length; i++) {
const nodesforSlot = projectableNodes[i];
// Projectable nodes can be passed as array of arrays or an array of iterables (ngUpgrade
// case). Here we do normalize passed data structure to be an array of arrays to avoid
// complex checks down the line.
// We also normalize the length of the passed in projectable nodes (to match the number of
// <ng-container> slots defined by a component).
projection.push(nodesforSlot != null ? Array.from(nodesforSlot) : null);
}
}
// TODO: should LifecycleHooksFeature and other host features be generated by the compiler and

23
packages/core/src/render3/view_ref.ts
View File

@ -10,7 +10,7 @@ import {ApplicationRef} from '../application_ref';
import {ChangeDetectorRef as viewEngine_ChangeDetectorRef} from '../change_detection/change_detector_ref';
import {ViewContainerRef as viewEngine_ViewContainerRef} from '../linker/view_container_ref';
import {EmbeddedViewRef as viewEngine_EmbeddedViewRef, InternalViewRef as viewEngine_InternalViewRef} from '../linker/view_ref';
import {assertDefined} from '../util/assert';
import {checkNoChangesInRootView, checkNoChangesInternal, detectChangesInRootView, detectChangesInternal, markViewDirty, storeCleanupFn} from './instructions/shared';
import {CONTAINER_HEADER_OFFSET} from './interfaces/container';
import {TElementNode, TNode, TNodeType, TViewNode} from './interfaces/node';
@ -359,11 +359,22 @@ function collectNativeNodes(
} else if (tNodeType === TNodeType.Projection) {
const componentView = lView[DECLARATION_COMPONENT_VIEW];
const componentHost = componentView[T_HOST] as TElementNode;
const parentView = getLViewParent(componentView);
let firstProjectedNode: TNode|null =
(componentHost.projection as (TNode | null)[])[tNode.projection as number];
if (firstProjectedNode !== null && parentView !== null) {
collectNativeNodes(parentView[TVIEW], parentView, firstProjectedNode, result, true);
const slotIdx = tNode.projection as number;
ngDevMode &&
assertDefined(
componentHost.projection,
'Components with projection nodes (<ng-content>) must have projection slots defined.');
const nodesInSlot = componentHost.projection![slotIdx];
if (Array.isArray(nodesInSlot)) {
result.push(...nodesInSlot);
} else {
const parentView = getLViewParent(componentView)!;
ngDevMode &&
assertDefined(
parentView,
'Component views should always have a parent view (component\'s host view)');
collectNativeNodes(parentView[TVIEW], parentView, nodesInSlot, result, true);
}
}
tNode = isProjection ? tNode.projectionNext : tNode.next;