@angular/core
Version:
Angular - the core framework
49 lines • 7.33 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 { assertGreaterThan, assertNotEqual, assertNumber } from '../../util/assert';
import { NO_PARENT_INJECTOR } from '../interfaces/injector';
import { DECLARATION_VIEW, HEADER_OFFSET } from '../interfaces/view';
/// Parent Injector Utils ///////////////////////////////////////////////////////////////
export function hasParentInjector(parentLocation) {
return parentLocation !== NO_PARENT_INJECTOR;
}
export function getParentInjectorIndex(parentLocation) {
if (ngDevMode) {
assertNumber(parentLocation, 'Number expected');
assertNotEqual(parentLocation, -1, 'Not a valid state.');
const parentInjectorIndex = parentLocation & 32767 /* RelativeInjectorLocationFlags.InjectorIndexMask */;
assertGreaterThan(parentInjectorIndex, HEADER_OFFSET, 'Parent injector must be pointing past HEADER_OFFSET.');
}
return parentLocation & 32767 /* RelativeInjectorLocationFlags.InjectorIndexMask */;
}
export function getParentInjectorViewOffset(parentLocation) {
return parentLocation >> 16 /* RelativeInjectorLocationFlags.ViewOffsetShift */;
}
/**
* Unwraps a parent injector location number to find the view offset from the current injector,
* then walks up the declaration view tree until the view is found that contains the parent
* injector.
*
* @param location The location of the parent injector, which contains the view offset
* @param startView The LView instance from which to start walking up the view tree
* @returns The LView instance that contains the parent injector
*/
export function getParentInjectorView(location, startView) {
let viewOffset = getParentInjectorViewOffset(location);
let parentView = startView;
// For most cases, the parent injector can be found on the host node (e.g. for component
// or container), but we must keep the loop here to support the rarer case of deeply nested
// <ng-template> tags or inline views, where the parent injector might live many views
// above the child injector.
while (viewOffset > 0) {
parentView = parentView[DECLARATION_VIEW];
viewOffset--;
}
return parentView;
}
//# sourceMappingURL=data:application/json;base64,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