/** * @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 { isType, Type } from '../interface/type'; import { newArray } from '../util/array_utils'; import { ANNOTATIONS, PARAMETERS, PROP_METADATA } from '../util/decorators'; import { global } from '../util/global'; /* * ######################### * Attention: These Regular expressions have to hold even if the code is minified! * ########################## */ /** * Regular expression that detects pass-through constructors for ES5 output. This Regex * intends to capture the common delegation pattern emitted by TypeScript and Babel. Also * it intends to capture the pattern where existing constructors have been downleveled from * ES2015 to ES5 using TypeScript w/ downlevel iteration. e.g. * * ``` * function MyClass() { * var _this = _super.apply(this, arguments) || this; * ``` * * downleveled to ES5 with `downlevelIteration` for TypeScript < 4.2: * ``` * function MyClass() { * var _this = _super.apply(this, __spread(arguments)) || this; * ``` * * or downleveled to ES5 with `downlevelIteration` for TypeScript >= 4.2: * ``` * function MyClass() { * var _this = _super.apply(this, __spreadArray([], __read(arguments), false)) || this; * ``` * * More details can be found in: https://github.com/angular/angular/issues/38453. */ export const ES5_DELEGATE_CTOR = /^function\s+\S+\(\)\s*{[\s\S]+\.apply\(this,\s*(arguments|(?:[^()]+\(\[\],)?[^()]+\(arguments\).*)\)/; /** Regular expression that detects ES2015 classes which extend from other classes. */ export const ES2015_INHERITED_CLASS = /^class\s+[A-Za-z\d$_]*\s*extends\s+[^{]+{/; /** * Regular expression that detects ES2015 classes which extend from other classes and * have an explicit constructor defined. */ export const ES2015_INHERITED_CLASS_WITH_CTOR = /^class\s+[A-Za-z\d$_]*\s*extends\s+[^{]+{[\s\S]*constructor\s*\(/; /** * Regular expression that detects ES2015 classes which extend from other classes * and inherit a constructor. */ export const ES2015_INHERITED_CLASS_WITH_DELEGATE_CTOR = /^class\s+[A-Za-z\d$_]*\s*extends\s+[^{]+{[\s\S]*constructor\s*\(\)\s*{[^}]*super\(\.\.\.arguments\)/; /** * Determine whether a stringified type is a class which delegates its constructor * to its parent. * * This is not trivial since compiled code can actually contain a constructor function * even if the original source code did not. For instance, when the child class contains * an initialized instance property. */ export function isDelegateCtor(typeStr) { return ES5_DELEGATE_CTOR.test(typeStr) || ES2015_INHERITED_CLASS_WITH_DELEGATE_CTOR.test(typeStr) || (ES2015_INHERITED_CLASS.test(typeStr) && !ES2015_INHERITED_CLASS_WITH_CTOR.test(typeStr)); } export class ReflectionCapabilities { constructor(reflect) { this._reflect = reflect || global['Reflect']; } factory(t) { return (...args) => new t(...args); } /** @internal */ _zipTypesAndAnnotations(paramTypes, paramAnnotations) { let result; if (typeof paramTypes === 'undefined') { result = newArray(paramAnnotations.length); } else { result = newArray(paramTypes.length); } for (let i = 0; i < result.length; i++) { // TS outputs Object for parameters without types, while Traceur omits // the annotations. For now we preserve the Traceur behavior to aid // migration, but this can be revisited. if (typeof paramTypes === 'undefined') { result[i] = []; } else if (paramTypes[i] && paramTypes[i] != Object) { result[i] = [paramTypes[i]]; } else { result[i] = []; } if (paramAnnotations && paramAnnotations[i] != null) { result[i] = result[i].concat(paramAnnotations[i]); } } return result; } _ownParameters(type, parentCtor) { const typeStr = type.toString(); // If we have no decorators, we only have function.length as metadata. // In that case, to detect whether a child class declared an own constructor or not, // we need to look inside of that constructor to check whether it is // just calling the parent. // This also helps to work around for https://github.com/Microsoft/TypeScript/issues/12439 // that sets 'design:paramtypes' to [] // if a class inherits from another class but has no ctor declared itself. if (isDelegateCtor(typeStr)) { return null; } // Prefer the direct API. if (type.parameters && type.parameters !== parentCtor.parameters) { return type.parameters; } // API of tsickle for lowering decorators to properties on the class. const tsickleCtorParams = type.ctorParameters; if (tsickleCtorParams && tsickleCtorParams !== parentCtor.ctorParameters) { // Newer tsickle uses a function closure // Retain the non-function case for compatibility with older tsickle const ctorParameters = typeof tsickleCtorParams === 'function' ? tsickleCtorParams() : tsickleCtorParams; const paramTypes = ctorParameters.map((ctorParam) => ctorParam && ctorParam.type); const paramAnnotations = ctorParameters.map((ctorParam) => ctorParam && convertTsickleDecoratorIntoMetadata(ctorParam.decorators)); return this._zipTypesAndAnnotations(paramTypes, paramAnnotations); } // API for metadata created by invoking the decorators. const paramAnnotations = type.hasOwnProperty(PARAMETERS) && type[PARAMETERS]; const paramTypes = this._reflect && this._reflect.getOwnMetadata && this._reflect.getOwnMetadata('design:paramtypes', type); if (paramTypes || paramAnnotations) { return this._zipTypesAndAnnotations(paramTypes, paramAnnotations); } // If a class has no decorators, at least create metadata // based on function.length. // Note: We know that this is a real constructor as we checked // the content of the constructor above. return newArray(type.length); } parameters(type) { // Note: only report metadata if we have at least one class decorator // to stay in sync with the static reflector. if (!isType(type)) { return []; } const parentCtor = getParentCtor(type); let parameters = this._ownParameters(type, parentCtor); if (!parameters && parentCtor !== Object) { parameters = this.parameters(parentCtor); } return parameters || []; } _ownAnnotations(typeOrFunc, parentCtor) { // Prefer the direct API. if (typeOrFunc.annotations && typeOrFunc.annotations !== parentCtor.annotations) { let annotations = typeOrFunc.annotations; if (typeof annotations === 'function' && annotations.annotations) { annotations = annotations.annotations; } return annotations; } // API of tsickle for lowering decorators to properties on the class. if (typeOrFunc.decorators && typeOrFunc.decorators !== parentCtor.decorators) { return convertTsickleDecoratorIntoMetadata(typeOrFunc.decorators); } // API for metadata created by invoking the decorators. if (typeOrFunc.hasOwnProperty(ANNOTATIONS)) { return typeOrFunc[ANNOTATIONS]; } return null; } annotations(typeOrFunc) { if (!isType(typeOrFunc)) { return []; } const parentCtor = getParentCtor(typeOrFunc); const ownAnnotations = this._ownAnnotations(typeOrFunc, parentCtor) || []; const parentAnnotations = parentCtor !== Object ? this.annotations(parentCtor) : []; return parentAnnotations.concat(ownAnnotations); } _ownPropMetadata(typeOrFunc, parentCtor) { // Prefer the direct API. if (typeOrFunc.propMetadata && typeOrFunc.propMetadata !== parentCtor.propMetadata) { let propMetadata = typeOrFunc.propMetadata; if (typeof propMetadata === 'function' && propMetadata.propMetadata) { propMetadata = propMetadata.propMetadata; } return propMetadata; } // API of tsickle for lowering decorators to properties on the class. if (typeOrFunc.propDecorators && typeOrFunc.propDecorators !== parentCtor.propDecorators) { const propDecorators = typeOrFunc.propDecorators; const propMetadata = {}; Object.keys(propDecorators).forEach(prop => { propMetadata[prop] = convertTsickleDecoratorIntoMetadata(propDecorators[prop]); }); return propMetadata; } // API for metadata created by invoking the decorators. if (typeOrFunc.hasOwnProperty(PROP_METADATA)) { return typeOrFunc[PROP_METADATA]; } return null; } propMetadata(typeOrFunc) { if (!isType(typeOrFunc)) { return {}; } const parentCtor = getParentCtor(typeOrFunc); const propMetadata = {}; if (parentCtor !== Object) { const parentPropMetadata = this.propMetadata(parentCtor); Object.keys(parentPropMetadata).forEach((propName) => { propMetadata[propName] = parentPropMetadata[propName]; }); } const ownPropMetadata = this._ownPropMetadata(typeOrFunc, parentCtor); if (ownPropMetadata) { Object.keys(ownPropMetadata).forEach((propName) => { const decorators = []; if (propMetadata.hasOwnProperty(propName)) { decorators.push(...propMetadata[propName]); } decorators.push(...ownPropMetadata[propName]); propMetadata[propName] = decorators; }); } return propMetadata; } ownPropMetadata(typeOrFunc) { if (!isType(typeOrFunc)) { return {}; } return this._ownPropMetadata(typeOrFunc, getParentCtor(typeOrFunc)) || {}; } hasLifecycleHook(type, lcProperty) { return type instanceof Type && lcProperty in type.prototype; } } function convertTsickleDecoratorIntoMetadata(decoratorInvocations) { if (!decoratorInvocations) { return []; } return decoratorInvocations.map(decoratorInvocation => { const decoratorType = decoratorInvocation.type; const annotationCls = decoratorType.annotationCls; const annotationArgs = decoratorInvocation.args ? decoratorInvocation.args : []; return new annotationCls(...annotationArgs); }); } function getParentCtor(ctor) { const parentProto = ctor.prototype ? 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* @license\n * Copyright Google LLC 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 {isType, Type} from '../interface/type';\nimport {newArray} from '../util/array_utils';\nimport {ANNOTATIONS, PARAMETERS, PROP_METADATA} from '../util/decorators';\nimport {global} from '../util/global';\n\nimport {PlatformReflectionCapabilities} from './platform_reflection_capabilities';\n\n\n\n/*\n * #########################\n * Attention: These Regular expressions have to hold even if the code is minified!\n * ##########################\n */\n\n/**\n * Regular expression that detects pass-through constructors for ES5 output. This Regex\n * intends to capture the common delegation pattern emitted by TypeScript and Babel. Also\n * it intends to capture the pattern where existing constructors have been downleveled from\n * ES2015 to ES5 using TypeScript w/ downlevel iteration. e.g.\n *\n * ```\n *   function MyClass() {\n *     var _this = _super.apply(this, arguments) || this;\n * ```\n *\n * downleveled to ES5 with `downlevelIteration` for TypeScript < 4.2:\n * ```\n *   function MyClass() {\n *     var _this = _super.apply(this, __spread(arguments)) || this;\n * ```\n *\n * or downleveled to ES5 with `downlevelIteration` for TypeScript >= 4.2:\n * ```\n *   function MyClass() {\n *     var _this = _super.apply(this, __spreadArray([], __read(arguments), false)) || this;\n * ```\n *\n * More details can be found in: https://github.com/angular/angular/issues/38453.\n */\nexport const ES5_DELEGATE_CTOR =\n    /^function\\s+\\S+\\(\\)\\s*{[\\s\\S]+\\.apply\\(this,\\s*(arguments|(?:[^()]+\\(\\[\\],)?[^()]+\\(arguments\\).*)\\)/;\n/** Regular expression that detects ES2015 classes which extend from other classes. */\nexport const ES2015_INHERITED_CLASS = /^class\\s+[A-Za-z\\d$_]*\\s*extends\\s+[^{]+{/;\n/**\n * Regular expression that detects ES2015 classes which extend from other classes and\n * have an explicit constructor defined.\n */\nexport const ES2015_INHERITED_CLASS_WITH_CTOR =\n    /^class\\s+[A-Za-z\\d$_]*\\s*extends\\s+[^{]+{[\\s\\S]*constructor\\s*\\(/;\n/**\n * Regular expression that detects ES2015 classes which extend from other classes\n * and inherit a constructor.\n */\nexport const ES2015_INHERITED_CLASS_WITH_DELEGATE_CTOR =\n    /^class\\s+[A-Za-z\\d$_]*\\s*extends\\s+[^{]+{[\\s\\S]*constructor\\s*\\(\\)\\s*{[^}]*super\\(\\.\\.\\.arguments\\)/;\n\n/**\n * Determine whether a stringified type is a class which delegates its constructor\n * to its parent.\n *\n * This is not trivial since compiled code can actually contain a constructor function\n * even if the original source code did not. For instance, when the child class contains\n * an initialized instance property.\n */\nexport function isDelegateCtor(typeStr: string): boolean {\n  return ES5_DELEGATE_CTOR.test(typeStr) ||\n      ES2015_INHERITED_CLASS_WITH_DELEGATE_CTOR.test(typeStr) ||\n      (ES2015_INHERITED_CLASS.test(typeStr) && !ES2015_INHERITED_CLASS_WITH_CTOR.test(typeStr));\n}\n\nexport class ReflectionCapabilities implements PlatformReflectionCapabilities {\n  private _reflect: any;\n\n  constructor(reflect?: any) {\n    this._reflect = reflect || global['Reflect'];\n  }\n\n  factory<T>(t: Type<T>): (args: any[]) => T {\n    return (...args: any[]) => new t(...args);\n  }\n\n  /** @internal */\n  _zipTypesAndAnnotations(paramTypes: any[], paramAnnotations: any[]): any[][] {\n    let result: any[][];\n\n    if (typeof paramTypes === 'undefined') {\n      result = newArray(paramAnnotations.length);\n    } else {\n      result = newArray(paramTypes.length);\n    }\n\n    for (let i = 0; i < result.length; i++) {\n      // TS outputs Object for parameters without types, while Traceur omits\n      // the annotations. For now we preserve the Traceur behavior to aid\n      // migration, but this can be revisited.\n      if (typeof paramTypes === 'undefined') {\n        result[i] = [];\n      } else if (paramTypes[i] && paramTypes[i] != Object) {\n        result[i] = [paramTypes[i]];\n      } else {\n        result[i] = [];\n      }\n      if (paramAnnotations && paramAnnotations[i] != null) {\n        result[i] = result[i].concat(paramAnnotations[i]);\n      }\n    }\n    return result;\n  }\n\n  private _ownParameters(type: Type<any>, parentCtor: any): any[][]|null {\n    const typeStr = type.toString();\n    // If we have no decorators, we only have function.length as metadata.\n    // In that case, to detect whether a child class declared an own constructor or not,\n    // we need to look inside of that constructor to check whether it is\n    // just calling the parent.\n    // This also helps to work around for https://github.com/Microsoft/TypeScript/issues/12439\n    // that sets 'design:paramtypes' to []\n    // if a class inherits from another class but has no ctor declared itself.\n    if (isDelegateCtor(typeStr)) {\n      return null;\n    }\n\n    // Prefer the direct API.\n    if ((<any>type).parameters && (<any>type).parameters !== parentCtor.parameters) {\n      return (<any>type).parameters;\n    }\n\n    // API of tsickle for lowering decorators to properties on the class.\n    const tsickleCtorParams = (<any>type).ctorParameters;\n    if (tsickleCtorParams && tsickleCtorParams !== parentCtor.ctorParameters) {\n      // Newer tsickle uses a function closure\n      // Retain the non-function case for compatibility with older tsickle\n      const ctorParameters =\n          typeof tsickleCtorParams === 'function' ? tsickleCtorParams() : tsickleCtorParams;\n      const paramTypes = ctorParameters.map((ctorParam: any) => ctorParam && ctorParam.type);\n      const paramAnnotations = ctorParameters.map(\n          (ctorParam: any) =>\n              ctorParam && convertTsickleDecoratorIntoMetadata(ctorParam.decorators));\n      return this._zipTypesAndAnnotations(paramTypes, paramAnnotations);\n    }\n\n    // API for metadata created by invoking the decorators.\n    const paramAnnotations = type.hasOwnProperty(PARAMETERS) && (type as any)[PARAMETERS];\n    const paramTypes = this._reflect && this._reflect.getOwnMetadata &&\n        this._reflect.getOwnMetadata('design:paramtypes', type);\n    if (paramTypes || paramAnnotations) {\n      return this._zipTypesAndAnnotations(paramTypes, paramAnnotations);\n    }\n\n    // If a class has no decorators, at least create metadata\n    // based on function.length.\n    // Note: We know that this is a real constructor as we checked\n    // the content of the constructor above.\n    return newArray<any[]>(type.length);\n  }\n\n  parameters(type: Type<any>): any[][] {\n    // Note: only report metadata if we have at least one class decorator\n    // to stay in sync with the static reflector.\n    if (!isType(type)) {\n      return [];\n    }\n    const parentCtor = getParentCtor(type);\n    let parameters = this._ownParameters(type, parentCtor);\n    if (!parameters && parentCtor !== Object) {\n      parameters = this.parameters(parentCtor);\n    }\n    return parameters || [];\n  }\n\n  private _ownAnnotations(typeOrFunc: Type<any>, parentCtor: any): any[]|null {\n    // Prefer the direct API.\n    if ((<any>typeOrFunc).annotations && (<any>typeOrFunc).annotations !== parentCtor.annotations) {\n      let annotations = (<any>typeOrFunc).annotations;\n      if (typeof annotations === 'function' && annotations.annotations) {\n        annotations = annotations.annotations;\n      }\n      return annotations;\n    }\n\n    // API of tsickle for lowering decorators to properties on the class.\n    if ((<any>typeOrFunc).decorators && (<any>typeOrFunc).decorators !== parentCtor.decorators) {\n      return convertTsickleDecoratorIntoMetadata((<any>typeOrFunc).decorators);\n    }\n\n    // API for metadata created by invoking the decorators.\n    if (typeOrFunc.hasOwnProperty(ANNOTATIONS)) {\n      return (typeOrFunc as any)[ANNOTATIONS];\n    }\n    return null;\n  }\n\n  annotations(typeOrFunc: Type<any>): any[] {\n    if (!isType(typeOrFunc)) {\n      return [];\n    }\n    const parentCtor = getParentCtor(typeOrFunc);\n    const ownAnnotations = this._ownAnnotations(typeOrFunc, parentCtor) || [];\n    const parentAnnotations = parentCtor !== Object ? this.annotations(parentCtor) : [];\n    return parentAnnotations.concat(ownAnnotations);\n  }\n\n  private _ownPropMetadata(typeOrFunc: any, parentCtor: any): {[key: string]: any[]}|null {\n    // Prefer the direct API.\n    if ((<any>typeOrFunc).propMetadata &&\n        (<any>typeOrFunc).propMetadata !== parentCtor.propMetadata) {\n      let propMetadata = (<any>typeOrFunc).propMetadata;\n      if (typeof propMetadata === 'function' && propMetadata.propMetadata) {\n        propMetadata = propMetadata.propMetadata;\n      }\n      return propMetadata;\n    }\n\n    // API of tsickle for lowering decorators to properties on the class.\n    if ((<any>typeOrFunc).propDecorators &&\n        (<any>typeOrFunc).propDecorators !== parentCtor.propDecorators) {\n      const propDecorators = (<any>typeOrFunc).propDecorators;\n      const propMetadata = <{[key: string]: any[]}>{};\n      Object.keys(propDecorators).forEach(prop => {\n        propMetadata[prop] = convertTsickleDecoratorIntoMetadata(propDecorators[prop]);\n      });\n      return propMetadata;\n    }\n\n    // API for metadata created by invoking the decorators.\n    if (typeOrFunc.hasOwnProperty(PROP_METADATA)) {\n      return (typeOrFunc as any)[PROP_METADATA];\n    }\n    return null;\n  }\n\n  propMetadata(typeOrFunc: any): {[key: string]: any[]} {\n    if (!isType(typeOrFunc)) {\n      return {};\n    }\n    const parentCtor = getParentCtor(typeOrFunc);\n    const propMetadata: {[key: string]: any[]} = {};\n    if (parentCtor !== Object) {\n      const parentPropMetadata = this.propMetadata(parentCtor);\n      Object.keys(parentPropMetadata).forEach((propName) => {\n        propMetadata[propName] = parentPropMetadata[propName];\n      });\n    }\n    const ownPropMetadata = this._ownPropMetadata(typeOrFunc, parentCtor);\n    if (ownPropMetadata) {\n      Object.keys(ownPropMetadata).forEach((propName) => {\n        const decorators: any[] = [];\n        if (propMetadata.hasOwnProperty(propName)) {\n          decorators.push(...propMetadata[propName]);\n        }\n        decorators.push(...ownPropMetadata[propName]);\n        propMetadata[propName] = decorators;\n      });\n    }\n    return propMetadata;\n  }\n\n  ownPropMetadata(typeOrFunc: any): {[key: string]: any[]} {\n    if (!isType(typeOrFunc)) {\n      return {};\n    }\n    return this._ownPropMetadata(typeOrFunc, getParentCtor(typeOrFunc)) || {};\n  }\n\n  hasLifecycleHook(type: any, lcProperty: string): boolean {\n    return type instanceof Type && lcProperty in type.prototype;\n  }\n}\n\nfunction convertTsickleDecoratorIntoMetadata(decoratorInvocations: any[]): any[] {\n  if (!decoratorInvocations) {\n    return [];\n  }\n  return decoratorInvocations.map(decoratorInvocation => {\n    const decoratorType = decoratorInvocation.type;\n    const annotationCls = decoratorType.annotationCls;\n    const annotationArgs = decoratorInvocation.args ? decoratorInvocation.args : [];\n    return new annotationCls(...annotationArgs);\n  });\n}\n\nfunction getParentCtor(ctor: Function): Type<any> {\n  const parentProto = ctor.prototype ? Object.getPrototypeOf(ctor.prototype) : null;\n  const parentCtor = parentProto ? parentProto.constructor : null;\n  // Note: We always use `Object` as the null value\n  // to simplify checking later on.\n  return parentCtor || Object;\n}\n"]}