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/**
* @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 { isForwardRef, resolveForwardRef } from '../di/forward_ref';
import { injectRootLimpMode, setInjectImplementation } from '../di/inject_switch';
import { convertToBitFlags } from '../di/injector_compatibility';
import { InjectFlags } from '../di/interface/injector';
import { assertDefined, assertEqual, assertIndexInRange } from '../util/assert';
import { noSideEffects } from '../util/closure';
import { assertDirectiveDef, assertNodeInjector, assertTNodeForLView } from './assert';
import { emitInstanceCreatedByInjectorEvent, runInInjectorProfilerContext, setInjectorProfilerContext, } from './debug/injector_profiler';
import { getFactoryDef } from './definition_factory';
import { throwCyclicDependencyError, throwProviderNotFoundError } from './errors_di';
import { NG_ELEMENT_ID, NG_FACTORY_DEF } from './fields';
import { registerPreOrderHooks } from './hooks';
import { isFactory, NO_PARENT_INJECTOR, } from './interfaces/injector';
import { isComponentDef, isComponentHost } from './interfaces/type_checks';
import { DECLARATION_COMPONENT_VIEW, DECLARATION_VIEW, EMBEDDED_VIEW_INJECTOR, FLAGS, INJECTOR, T_HOST, TVIEW, } from './interfaces/view';
import { assertTNodeType } from './node_assert';
import { enterDI, getCurrentTNode, getLView, leaveDI } from './state';
import { isNameOnlyAttributeMarker } from './util/attrs_utils';
import { getParentInjectorIndex, getParentInjectorView, hasParentInjector, } from './util/injector_utils';
import { stringifyForError } from './util/stringify_utils';
/**
* Defines if the call to `inject` should include `viewProviders` in its resolution.
*
* This is set to true when we try to instantiate a component. This value is reset in
* `getNodeInjectable` to a value which matches the declaration location of the token about to be
* instantiated. This is done so that if we are injecting a token which was declared outside of
* `viewProviders` we don't accidentally pull `viewProviders` in.
*
* Example:
*
* ```
* @Injectable()
* class MyService {
* constructor(public value: String) {}
* }
*
* @Component({
* providers: [
* MyService,
* {provide: String, value: 'providers' }
* ]
* viewProviders: [
* {provide: String, value: 'viewProviders'}
* ]
* })
* class MyComponent {
* constructor(myService: MyService, value: String) {
* // We expect that Component can see into `viewProviders`.
* expect(value).toEqual('viewProviders');
* // `MyService` was not declared in `viewProviders` hence it can't see it.
* expect(myService.value).toEqual('providers');
* }
* }
*
* ```
*/
let includeViewProviders = true;
export function setIncludeViewProviders(v) {
const oldValue = includeViewProviders;
includeViewProviders = v;
return oldValue;
}
/**
* The number of slots in each bloom filter (used by DI). The larger this number, the fewer
* directives that will share slots, and thus, the fewer false positives when checking for
* the existence of a directive.
*/
const BLOOM_SIZE = 256;
const BLOOM_MASK = BLOOM_SIZE - 1;
/**
* The number of bits that is represented by a single bloom bucket. JS bit operations are 32 bits,
* so each bucket represents 32 distinct tokens which accounts for log2(32) = 5 bits of a bloom hash
* number.
*/
const BLOOM_BUCKET_BITS = 5;
/** Counter used to generate unique IDs for directives. */
let nextNgElementId = 0;
/** Value used when something wasn't found by an injector. */
const NOT_FOUND = {};
/**
* Registers this directive as present in its node's injector by flipping the directive's
* corresponding bit in the injector's bloom filter.
*
* @param injectorIndex The index of the node injector where this token should be registered
* @param tView The TView for the injector's bloom filters
* @param type The directive token to register
*/
export function bloomAdd(injectorIndex, tView, type) {
ngDevMode && assertEqual(tView.firstCreatePass, true, 'expected firstCreatePass to be true');
let id;
if (typeof type === 'string') {
id = type.charCodeAt(0) || 0;
}
else if (type.hasOwnProperty(NG_ELEMENT_ID)) {
id = type[NG_ELEMENT_ID];
}
// Set a unique ID on the directive type, so if something tries to inject the directive,
// we can easily retrieve the ID and hash it into the bloom bit that should be checked.
if (id == null) {
id = type[NG_ELEMENT_ID] = nextNgElementId++;
}
// We only have BLOOM_SIZE (256) slots in our bloom filter (8 buckets * 32 bits each),
// so all unique IDs must be modulo-ed into a number from 0 - 255 to fit into the filter.
const bloomHash = id & BLOOM_MASK;
// Create a mask that targets the specific bit associated with the directive.
// JS bit operations are 32 bits, so this will be a number between 2^0 and 2^31, corresponding
// to bit positions 0 - 31 in a 32 bit integer.
const mask = 1 << bloomHash;
// Each bloom bucket in `tData` represents `BLOOM_BUCKET_BITS` number of bits of `bloomHash`.
// Any bits in `bloomHash` beyond `BLOOM_BUCKET_BITS` indicate the bucket offset that the mask
// should be written to.
tView.data[injectorIndex + (bloomHash >> BLOOM_BUCKET_BITS)] |= mask;
}
/**
* Creates (or gets an existing) injector for a given element or container.
*
* @param tNode for which an injector should be retrieved / created.
* @param lView View where the node is stored
* @returns Node injector
*/
export function getOrCreateNodeInjectorForNode(tNode, lView) {
const existingInjectorIndex = getInjectorIndex(tNode, lView);
if (existingInjectorIndex !== -1) {
return existingInjectorIndex;
}
const tView = lView[TVIEW];
if (tView.firstCreatePass) {
tNode.injectorIndex = lView.length;
insertBloom(tView.data, tNode); // foundation for node bloom
insertBloom(lView, null); // foundation for cumulative bloom
insertBloom(tView.blueprint, null);
}
const parentLoc = getParentInjectorLocation(tNode, lView);
const injectorIndex = tNode.injectorIndex;
// If a parent injector can't be found, its location is set to -1.
// In that case, we don't need to set up a cumulative bloom
if (hasParentInjector(parentLoc)) {
const parentIndex = getParentInjectorIndex(parentLoc);
const parentLView = getParentInjectorView(parentLoc, lView);
const parentData = parentLView[TVIEW].data;
// Creates a cumulative bloom filter that merges the parent's bloom filter
// and its own cumulative bloom (which contains tokens for all ancestors)
for (let i = 0; i < 8 /* NodeInjectorOffset.BLOOM_SIZE */; i++) {
lView[injectorIndex + i] = parentLView[parentIndex + i] | parentData[parentIndex + i];
}
}
lView[injectorIndex + 8 /* NodeInjectorOffset.PARENT */] = parentLoc;
return injectorIndex;
}
function insertBloom(arr, footer) {
arr.push(0, 0, 0, 0, 0, 0, 0, 0, footer);
}
export function getInjectorIndex(tNode, lView) {
if (tNode.injectorIndex === -1 ||
// If the injector index is the same as its parent's injector index, then the index has been
// copied down from the parent node. No injector has been created yet on this node.
(tNode.parent && tNode.parent.injectorIndex === tNode.injectorIndex) ||
// After the first template pass, the injector index might exist but the parent values
// might not have been calculated yet for this instance
lView[tNode.injectorIndex + 8 /* NodeInjectorOffset.PARENT */] === null) {
return -1;
}
else {
ngDevMode && assertIndexInRange(lView, tNode.injectorIndex);
return tNode.injectorIndex;
}
}
/**
* Finds the index of the parent injector, with a view offset if applicable. Used to set the
* parent injector initially.
*
* @returns Returns a number that is the combination of the number of LViews that we have to go up
* to find the LView containing the parent inject AND the index of the injector within that LView.
*/
export function getParentInjectorLocation(tNode, lView) {
if (tNode.parent && tNode.parent.injectorIndex !== -1) {
// If we have a parent `TNode` and there is an injector associated with it we are done, because
// the parent injector is within the current `LView`.
return tNode.parent.injectorIndex; // ViewOffset is 0
}
// When parent injector location is computed it may be outside of the current view. (ie it could
// be pointing to a declared parent location). This variable stores number of declaration parents
// we need to walk up in order to find the parent injector location.
let declarationViewOffset = 0;
let parentTNode = null;
let lViewCursor = lView;
// The parent injector is not in the current `LView`. We will have to walk the declared parent
// `LView` hierarchy and look for it. If we walk of the top, that means that there is no parent
// `NodeInjector`.
while (lViewCursor !== null) {
parentTNode = getTNodeFromLView(lViewCursor);
if (parentTNode === null) {
// If we have no parent, than we are done.
return NO_PARENT_INJECTOR;
}
ngDevMode && parentTNode && assertTNodeForLView(parentTNode, lViewCursor[DECLARATION_VIEW]);
// Every iteration of the loop requires that we go to the declared parent.
declarationViewOffset++;
lViewCursor = lViewCursor[DECLARATION_VIEW];
if (parentTNode.injectorIndex !== -1) {
// We found a NodeInjector which points to something.
return (parentTNode.injectorIndex |
(declarationViewOffset <<
16 /* RelativeInjectorLocationFlags.ViewOffsetShift */));
}
}
return NO_PARENT_INJECTOR;
}
/**
* Makes a type or an injection token public to the DI system by adding it to an
* injector's bloom filter.
*
* @param di The node injector in which a directive will be added
* @param token The type or the injection token to be made public
*/
export function diPublicInInjector(injectorIndex, tView, token) {
bloomAdd(injectorIndex, tView, token);
}
/**
* Inject static attribute value into directive constructor.
*
* This method is used with `factory` functions which are generated as part of
* `defineDirective` or `defineComponent`. The method retrieves the static value
* of an attribute. (Dynamic attributes are not supported since they are not resolved
* at the time of injection and can change over time.)
*
* # Example
* Given:
* ```
* @Component(...)
* class MyComponent {
* constructor(@Attribute('title') title: string) { ... }
* }
* ```
* When instantiated with
* ```
*