@angular/core
Version:
Angular - the core framework
228 lines • 31.1 kB
JavaScript
/**
* @license
* Copyright Google Inc. 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 '../util/ng_dev_mode';
import { getClosureSafeProperty } from '../util/property';
import { stringify } from '../util/stringify';
import { resolveForwardRef } from './forward_ref';
import { InjectionToken } from './injection_token';
import { getInjectableDef } from './interface/defs';
import { InjectFlags } from './interface/injector';
import { Inject, Optional, Self, SkipSelf } from './metadata';
/**
* An InjectionToken that gets the current `Injector` for `createInjector()`-style injectors.
*
* Requesting this token instead of `Injector` allows `StaticInjector` to be tree-shaken from a
* project.
*
* @publicApi
*/
export var INJECTOR = new InjectionToken('INJECTOR', -1 // `-1` is used by Ivy DI system as special value to recognize it as `Injector`.
);
var _THROW_IF_NOT_FOUND = {};
export var THROW_IF_NOT_FOUND = _THROW_IF_NOT_FOUND;
export var NG_TEMP_TOKEN_PATH = 'ngTempTokenPath';
var NG_TOKEN_PATH = 'ngTokenPath';
var NEW_LINE = /\n/gm;
var NO_NEW_LINE = 'ɵ';
export var SOURCE = '__source';
var ɵ0 = getClosureSafeProperty;
export var USE_VALUE = getClosureSafeProperty({ provide: String, useValue: ɵ0 });
/**
* Current injector value used by `inject`.
* - `undefined`: it is an error to call `inject`
* - `null`: `inject` can be called but there is no injector (limp-mode).
* - Injector instance: Use the injector for resolution.
*/
var _currentInjector = undefined;
export function setCurrentInjector(injector) {
var former = _currentInjector;
_currentInjector = injector;
return former;
}
/**
* Current implementation of inject.
*
* By default, it is `injectInjectorOnly`, which makes it `Injector`-only aware. It can be changed
* to `directiveInject`, which brings in the `NodeInjector` system of ivy. It is designed this
* way for two reasons:
* 1. `Injector` should not depend on ivy logic.
* 2. To maintain tree shake-ability we don't want to bring in unnecessary code.
*/
var _injectImplementation;
/**
* Sets the current inject implementation.
*/
export function setInjectImplementation(impl) {
var previous = _injectImplementation;
_injectImplementation = impl;
return previous;
}
export function injectInjectorOnly(token, flags) {
if (flags === void 0) { flags = InjectFlags.Default; }
if (_currentInjector === undefined) {
throw new Error("inject() must be called from an injection context");
}
else if (_currentInjector === null) {
return injectRootLimpMode(token, undefined, flags);
}
else {
return _currentInjector.get(token, flags & InjectFlags.Optional ? null : undefined, flags);
}
}
export function ɵɵinject(token, flags) {
if (flags === void 0) { flags = InjectFlags.Default; }
return (_injectImplementation || injectInjectorOnly)(resolveForwardRef(token), flags);
}
/**
* Throws an error indicating that a factory function could not be generated by the compiler for a
* particular class.
*
* This instruction allows the actual error message to be optimized away when ngDevMode is turned
* off, saving bytes of generated code while still providing a good experience in dev mode.
*
* The name of the class is not mentioned here, but will be in the generated factory function name
* and thus in the stack trace.
*
* @codeGenApi
*/
export function ɵɵinvalidFactoryDep(index) {
var msg = ngDevMode ?
"This constructor is not compatible with Angular Dependency Injection because its dependency at index " + index + " of the parameter list is invalid.\nThis can happen if the dependency type is a primitive like a string or if an ancestor of this class is missing an Angular decorator.\n\nPlease check that 1) the type for the parameter at index " + index + " is correct and 2) the correct Angular decorators are defined for this class and its ancestors." :
'invalid';
throw new Error(msg);
}
/**
* Injects a token from the currently active injector.
*
* Must be used in the context of a factory function such as one defined for an
* `InjectionToken`. Throws an error if not called from such a context.
*
* Within such a factory function, using this function to request injection of a dependency
* is faster and more type-safe than providing an additional array of dependencies
* (as has been common with `useFactory` providers).
*
* @param token The injection token for the dependency to be injected.
* @param flags Optional flags that control how injection is executed.
* The flags correspond to injection strategies that can be specified with
* parameter decorators `@Host`, `@Self`, `@SkipSef`, and `@Optional`.
* @returns True if injection is successful, null otherwise.
*
* @usageNotes
*
* ### Example
*
* {@example core/di/ts/injector_spec.ts region='ShakableInjectionToken'}
*
* @publicApi
*/
export var inject = ɵɵinject;
/**
* Injects `root` tokens in limp mode.
*
* If no injector exists, we can still inject tree-shakable providers which have `providedIn` set to
* `"root"`. This is known as the limp mode injection. In such case the value is stored in the
* `InjectableDef`.
*/
export function injectRootLimpMode(token, notFoundValue, flags) {
var injectableDef = getInjectableDef(token);
if (injectableDef && injectableDef.providedIn == 'root') {
return injectableDef.value === undefined ? injectableDef.value = injectableDef.factory() :
injectableDef.value;
}
if (flags & InjectFlags.Optional)
return null;
if (notFoundValue !== undefined)
return notFoundValue;
throw new Error("Injector: NOT_FOUND [" + stringify(token) + "]");
}
export function injectArgs(types) {
var args = [];
for (var i = 0; i < types.length; i++) {
var arg = resolveForwardRef(types[i]);
if (Array.isArray(arg)) {
if (arg.length === 0) {
throw new Error('Arguments array must have arguments.');
}
var type = undefined;
var flags = InjectFlags.Default;
for (var j = 0; j < arg.length; j++) {
var meta = arg[j];
if (meta instanceof Optional || meta.ngMetadataName === 'Optional' || meta === Optional) {
flags |= InjectFlags.Optional;
}
else if (meta instanceof SkipSelf || meta.ngMetadataName === 'SkipSelf' || meta === SkipSelf) {
flags |= InjectFlags.SkipSelf;
}
else if (meta instanceof Self || meta.ngMetadataName === 'Self' || meta === Self) {
flags |= InjectFlags.Self;
}
else if (meta instanceof Inject || meta === Inject) {
type = meta.token;
}
else {
type = meta;
}
}
args.push(ɵɵinject(type, flags));
}
else {
args.push(ɵɵinject(arg));
}
}
return args;
}
var NullInjector = /** @class */ (function () {
function NullInjector() {
}
NullInjector.prototype.get = function (token, notFoundValue) {
if (notFoundValue === void 0) { notFoundValue = THROW_IF_NOT_FOUND; }
if (notFoundValue === THROW_IF_NOT_FOUND) {
// Intentionally left behind: With dev tools open the debugger will stop here. There is no
// reason why correctly written application should cause this exception.
// TODO(misko): uncomment the next line once `ngDevMode` works with closure.
// if (ngDevMode) debugger;
var error = new Error("NullInjectorError: No provider for " + stringify(token) + "!");
error.name = 'NullInjectorError';
throw error;
}
return notFoundValue;
};
return NullInjector;
}());
export { NullInjector };
export function catchInjectorError(e, token, injectorErrorName, source) {
var tokenPath = e[NG_TEMP_TOKEN_PATH];
if (token[SOURCE]) {
tokenPath.unshift(token[SOURCE]);
}
e.message = formatError('\n' + e.message, tokenPath, injectorErrorName, source);
e[NG_TOKEN_PATH] = tokenPath;
e[NG_TEMP_TOKEN_PATH] = null;
throw e;
}
export function formatError(text, obj, injectorErrorName, source) {
if (source === void 0) { source = null; }
text = text && text.charAt(0) === '\n' && text.charAt(1) == NO_NEW_LINE ? text.substr(2) : text;
var context = stringify(obj);
if (Array.isArray(obj)) {
context = obj.map(stringify).join(' -> ');
}
else if (typeof obj === 'object') {
var parts = [];
for (var key in obj) {
if (obj.hasOwnProperty(key)) {
var value = obj[key];
parts.push(key + ':' + (typeof value === 'string' ? JSON.stringify(value) : stringify(value)));
}
}
context = "{" + parts.join(', ') + "}";
}
return "" + injectorErrorName + (source ? '(' + source + ')' : '') + "[" + context + "]: " + text.replace(NEW_LINE, '\n ');
}
export { ɵ0 };
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* @license\n * Copyright Google Inc. All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport '../util/ng_dev_mode';\n\nimport {Type} from '../interface/type';\nimport {getClosureSafeProperty} from '../util/property';\nimport {stringify} from '../util/stringify';\n\nimport {resolveForwardRef} from './forward_ref';\nimport {InjectionToken} from './injection_token';\nimport {Injector} from './injector';\nimport {getInjectableDef, ɵɵInjectableDef} from './interface/defs';\nimport {InjectFlags} from './interface/injector';\nimport {ValueProvider} from './interface/provider';\nimport {Inject, Optional, Self, SkipSelf} from './metadata';\n\n\n\n/**\n * An InjectionToken that gets the current `Injector` for `createInjector()`-style injectors.\n *\n * Requesting this token instead of `Injector` allows `StaticInjector` to be tree-shaken from a\n * project.\n *\n * @publicApi\n */\nexport const INJECTOR = new InjectionToken<Injector>(\n    'INJECTOR',\n    -1 as any  // `-1` is used by Ivy DI system as special value to recognize it as `Injector`.\n);\n\nconst _THROW_IF_NOT_FOUND = {};\nexport const THROW_IF_NOT_FOUND = _THROW_IF_NOT_FOUND;\n\nexport const NG_TEMP_TOKEN_PATH = 'ngTempTokenPath';\nconst NG_TOKEN_PATH = 'ngTokenPath';\nconst NEW_LINE = /\\n/gm;\nconst NO_NEW_LINE = 'ɵ';\nexport const SOURCE = '__source';\n\nexport const USE_VALUE =\n    getClosureSafeProperty<ValueProvider>({provide: String, useValue: getClosureSafeProperty});\n\n/**\n * Current injector value used by `inject`.\n * - `undefined`: it is an error to call `inject`\n * - `null`: `inject` can be called but there is no injector (limp-mode).\n * - Injector instance: Use the injector for resolution.\n */\nlet _currentInjector: Injector|undefined|null = undefined;\n\nexport function setCurrentInjector(injector: Injector|null|undefined): Injector|undefined|null {\n  const former = _currentInjector;\n  _currentInjector = injector;\n  return former;\n}\n\n/**\n * Current implementation of inject.\n *\n * By default, it is `injectInjectorOnly`, which makes it `Injector`-only aware. It can be changed\n * to `directiveInject`, which brings in the `NodeInjector` system of ivy. It is designed this\n * way for two reasons:\n *  1. `Injector` should not depend on ivy logic.\n *  2. To maintain tree shake-ability we don't want to bring in unnecessary code.\n */\nlet _injectImplementation: (<T>(token: Type<T>|InjectionToken<T>, flags?: InjectFlags) => T | null)|\n    undefined;\n\n/**\n * Sets the current inject implementation.\n */\nexport function setInjectImplementation(\n    impl: (<T>(token: Type<T>|InjectionToken<T>, flags?: InjectFlags) => T | null)|\n    undefined): (<T>(token: Type<T>|InjectionToken<T>, flags?: InjectFlags) => T | null)|undefined {\n  const previous = _injectImplementation;\n  _injectImplementation = impl;\n  return previous;\n}\n\nexport function injectInjectorOnly<T>(token: Type<T>|InjectionToken<T>): T;\nexport function injectInjectorOnly<T>(token: Type<T>|InjectionToken<T>, flags?: InjectFlags): T|\n    null;\nexport function injectInjectorOnly<T>(\n    token: Type<T>|InjectionToken<T>, flags = InjectFlags.Default): T|null {\n  if (_currentInjector === undefined) {\n    throw new Error(`inject() must be called from an injection context`);\n  } else if (_currentInjector === null) {\n    return injectRootLimpMode(token, undefined, flags);\n  } else {\n    return _currentInjector.get(token, flags & InjectFlags.Optional ? null : undefined, flags);\n  }\n}\n\n/**\n * Generated instruction: Injects a token from the currently active injector.\n *\n * Must be used in the context of a factory function such as one defined for an\n * `InjectionToken`. Throws an error if not called from such a context.\n *\n * (Additional documentation moved to `inject`, as it is the public API, and an alias for this\n * instruction)\n *\n * @see inject\n * @codeGenApi\n */\nexport function ɵɵinject<T>(token: Type<T>|InjectionToken<T>): T;\nexport function ɵɵinject<T>(token: Type<T>|InjectionToken<T>, flags?: InjectFlags): T|null;\nexport function ɵɵinject<T>(token: Type<T>|InjectionToken<T>, flags = InjectFlags.Default): T|null {\n  return (_injectImplementation || injectInjectorOnly)(resolveForwardRef(token), flags);\n}\n\n/**\n * Throws an error indicating that a factory function could not be generated by the compiler for a\n * particular class.\n *\n * This instruction allows the actual error message to be optimized away when ngDevMode is turned\n * off, saving bytes of generated code while still providing a good experience in dev mode.\n *\n * The name of the class is not mentioned here, but will be in the generated factory function name\n * and thus in the stack trace.\n *\n * @codeGenApi\n */\nexport function ɵɵinvalidFactoryDep(index: number): never {\n  const msg = ngDevMode ?\n      `This constructor is not compatible with Angular Dependency Injection because its dependency at index ${\n          index} of the parameter list is invalid.\nThis can happen if the dependency type is a primitive like a string or if an ancestor of this class is missing an Angular decorator.\n\nPlease check that 1) the type for the parameter at index ${\n          index} is correct and 2) the correct Angular decorators are defined for this class and its ancestors.` :\n      'invalid';\n  throw new Error(msg);\n}\n\n/**\n * Injects a token from the currently active injector.\n *\n * Must be used in the context of a factory function such as one defined for an\n * `InjectionToken`. Throws an error if not called from such a context.\n *\n * Within such a factory function, using this function to request injection of a dependency\n * is faster and more type-safe than providing an additional array of dependencies\n * (as has been common with `useFactory` providers).\n *\n * @param token The injection token for the dependency to be injected.\n * @param flags Optional flags that control how injection is executed.\n * The flags correspond to injection strategies that can be specified with\n * parameter decorators `@Host`, `@Self`, `@SkipSef`, and `@Optional`.\n * @returns True if injection is successful, null otherwise.\n *\n * @usageNotes\n *\n * ### Example\n *\n * {@example core/di/ts/injector_spec.ts region='ShakableInjectionToken'}\n *\n * @publicApi\n */\nexport const inject = ɵɵinject;\n\n/**\n * Injects `root` tokens in limp mode.\n *\n * If no injector exists, we can still inject tree-shakable providers which have `providedIn` set to\n * `\"root\"`. This is known as the limp mode injection. In such case the value is stored in the\n * `InjectableDef`.\n */\nexport function injectRootLimpMode<T>(\n    token: Type<T>|InjectionToken<T>, notFoundValue: T|undefined, flags: InjectFlags): T|null {\n  const injectableDef: ɵɵInjectableDef<T>|null = getInjectableDef(token);\n  if (injectableDef && injectableDef.providedIn == 'root') {\n    return injectableDef.value === undefined ? injectableDef.value = injectableDef.factory() :\n                                               injectableDef.value;\n  }\n  if (flags & InjectFlags.Optional) return null;\n  if (notFoundValue !== undefined) return notFoundValue;\n  throw new Error(`Injector: NOT_FOUND [${stringify(token)}]`);\n}\n\nexport function injectArgs(types: (Type<any>|InjectionToken<any>|any[])[]): any[] {\n  const args: any[] = [];\n  for (let i = 0; i < types.length; i++) {\n    const arg = resolveForwardRef(types[i]);\n    if (Array.isArray(arg)) {\n      if (arg.length === 0) {\n        throw new Error('Arguments array must have arguments.');\n      }\n      let type: Type<any>|undefined = undefined;\n      let flags: InjectFlags = InjectFlags.Default;\n\n      for (let j = 0; j < arg.length; j++) {\n        const meta = arg[j];\n        if (meta instanceof Optional || meta.ngMetadataName === 'Optional' || meta === Optional) {\n          flags |= InjectFlags.Optional;\n        } else if (\n            meta instanceof SkipSelf || meta.ngMetadataName === 'SkipSelf' || meta === SkipSelf) {\n          flags |= InjectFlags.SkipSelf;\n        } else if (meta instanceof Self || meta.ngMetadataName === 'Self' || meta === Self) {\n          flags |= InjectFlags.Self;\n        } else if (meta instanceof Inject || meta === Inject) {\n          type = meta.token;\n        } else {\n          type = meta;\n        }\n      }\n\n      args.push(ɵɵinject(type!, flags));\n    } else {\n      args.push(ɵɵinject(arg));\n    }\n  }\n  return args;\n}\n\n\nexport class NullInjector implements Injector {\n  get(token: any, notFoundValue: any = THROW_IF_NOT_FOUND): any {\n    if (notFoundValue === THROW_IF_NOT_FOUND) {\n      // Intentionally left behind: With dev tools open the debugger will stop here. There is no\n      // reason why correctly written application should cause this exception.\n      // TODO(misko): uncomment the next line once `ngDevMode` works with closure.\n      // if (ngDevMode) debugger;\n      const error = new Error(`NullInjectorError: No provider for ${stringify(token)}!`);\n      error.name = 'NullInjectorError';\n      throw error;\n    }\n    return notFoundValue;\n  }\n}\n\n\nexport function catchInjectorError(\n    e: any, token: any, injectorErrorName: string, source: string|null): never {\n  const tokenPath: any[] = e[NG_TEMP_TOKEN_PATH];\n  if (token[SOURCE]) {\n    tokenPath.unshift(token[SOURCE]);\n  }\n  e.message = formatError('\\n' + e.message, tokenPath, injectorErrorName, source);\n  e[NG_TOKEN_PATH] = tokenPath;\n  e[NG_TEMP_TOKEN_PATH] = null;\n  throw e;\n}\n\nexport function formatError(\n    text: string, obj: any, injectorErrorName: string, source: string|null = null): string {\n  text = text && text.charAt(0) === '\\n' && text.charAt(1) == NO_NEW_LINE ? text.substr(2) : text;\n  let context = stringify(obj);\n  if (Array.isArray(obj)) {\n    context = obj.map(stringify).join(' -> ');\n  } else if (typeof obj === 'object') {\n    let parts = <string[]>[];\n    for (let key in obj) {\n      if (obj.hasOwnProperty(key)) {\n        let value = obj[key];\n        parts.push(\n            key + ':' + (typeof value === 'string' ? JSON.stringify(value) : stringify(value)));\n      }\n    }\n    context = `{${parts.join(', ')}}`;\n  }\n  return `${injectorErrorName}${source ? '(' + source + ')' : ''}[${context}]: ${\n      text.replace(NEW_LINE, '\\n  ')}`;\n}\n"]}