@angular/compiler
Version:
Angular - the compiler library
144 lines • 23.7 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
*/
(function (factory) {
if (typeof module === "object" && typeof module.exports === "object") {
var v = factory(require, exports);
if (v !== undefined) module.exports = v;
}
else if (typeof define === "function" && define.amd) {
define("@angular/compiler/src/injectable_compiler_2", ["require", "exports", "tslib", "@angular/compiler/src/output/output_ast", "@angular/compiler/src/render3/partial/util", "@angular/compiler/src/render3/r3_factory", "@angular/compiler/src/render3/r3_identifiers", "@angular/compiler/src/render3/util", "@angular/compiler/src/render3/view/util"], factory);
}
})(function (require, exports) {
"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.createInjectableType = exports.compileInjectable = exports.createR3ProviderExpression = void 0;
var tslib_1 = require("tslib");
var o = require("@angular/compiler/src/output/output_ast");
var util_1 = require("@angular/compiler/src/render3/partial/util");
var r3_factory_1 = require("@angular/compiler/src/render3/r3_factory");
var r3_identifiers_1 = require("@angular/compiler/src/render3/r3_identifiers");
var util_2 = require("@angular/compiler/src/render3/util");
var util_3 = require("@angular/compiler/src/render3/view/util");
function createR3ProviderExpression(expression, isForwardRef) {
return { expression: expression, isForwardRef: isForwardRef };
}
exports.createR3ProviderExpression = createR3ProviderExpression;
function compileInjectable(meta, resolveForwardRefs) {
var result = null;
var factoryMeta = {
name: meta.name,
type: meta.type,
internalType: meta.internalType,
typeArgumentCount: meta.typeArgumentCount,
deps: [],
target: r3_factory_1.FactoryTarget.Injectable,
};
if (meta.useClass !== undefined) {
// meta.useClass has two modes of operation. Either deps are specified, in which case `new` is
// used to instantiate the class with dependencies injected, or deps are not specified and
// the factory of the class is used to instantiate it.
//
// A special case exists for useClass: Type where Type is the injectable type itself and no
// deps are specified, in which case 'useClass' is effectively ignored.
var useClassOnSelf = meta.useClass.expression.isEquivalent(meta.internalType);
var deps = undefined;
if (meta.deps !== undefined) {
deps = meta.deps;
}
if (deps !== undefined) {
// factory: () => new meta.useClass(...deps)
result = r3_factory_1.compileFactoryFunction(tslib_1.__assign(tslib_1.__assign({}, factoryMeta), { delegate: meta.useClass.expression, delegateDeps: deps, delegateType: r3_factory_1.R3FactoryDelegateType.Class }));
}
else if (useClassOnSelf) {
result = r3_factory_1.compileFactoryFunction(factoryMeta);
}
else {
result = {
statements: [],
expression: delegateToFactory(meta.type.value, meta.useClass.expression, resolveForwardRefs)
};
}
}
else if (meta.useFactory !== undefined) {
if (meta.deps !== undefined) {
result = r3_factory_1.compileFactoryFunction(tslib_1.__assign(tslib_1.__assign({}, factoryMeta), { delegate: meta.useFactory, delegateDeps: meta.deps || [], delegateType: r3_factory_1.R3FactoryDelegateType.Function }));
}
else {
result = {
statements: [],
expression: o.fn([], [new o.ReturnStatement(meta.useFactory.callFn([]))])
};
}
}
else if (meta.useValue !== undefined) {
// Note: it's safe to use `meta.useValue` instead of the `USE_VALUE in meta` check used for
// client code because meta.useValue is an Expression which will be defined even if the actual
// value is undefined.
result = r3_factory_1.compileFactoryFunction(tslib_1.__assign(tslib_1.__assign({}, factoryMeta), { expression: meta.useValue.expression }));
}
else if (meta.useExisting !== undefined) {
// useExisting is an `inject` call on the existing token.
result = r3_factory_1.compileFactoryFunction(tslib_1.__assign(tslib_1.__assign({}, factoryMeta), { expression: o.importExpr(r3_identifiers_1.Identifiers.inject).callFn([meta.useExisting.expression]) }));
}
else {
result = {
statements: [],
expression: delegateToFactory(meta.type.value, meta.internalType, resolveForwardRefs)
};
}
var token = meta.internalType;
var injectableProps = new util_3.DefinitionMap();
injectableProps.set('token', token);
injectableProps.set('factory', result.expression);
// Only generate providedIn property if it has a non-null value
if (meta.providedIn.expression.value !== null) {
injectableProps.set('providedIn', meta.providedIn.isForwardRef ? util_1.generateForwardRef(meta.providedIn.expression) :
meta.providedIn.expression);
}
var expression = o.importExpr(r3_identifiers_1.Identifiers.ɵɵdefineInjectable)
.callFn([injectableProps.toLiteralMap()], undefined, true);
return {
expression: expression,
type: createInjectableType(meta),
statements: result.statements,
};
}
exports.compileInjectable = compileInjectable;
function createInjectableType(meta) {
return new o.ExpressionType(o.importExpr(r3_identifiers_1.Identifiers.InjectableDeclaration, [util_2.typeWithParameters(meta.type.type, meta.typeArgumentCount)]));
}
exports.createInjectableType = createInjectableType;
function delegateToFactory(type, internalType, unwrapForwardRefs) {
if (type.node === internalType.node) {
// The types are the same, so we can simply delegate directly to the type's factory.
// ```
// factory: type.ɵfac
// ```
return internalType.prop('ɵfac');
}
if (!unwrapForwardRefs) {
// The type is not wrapped in a `forwardRef()`, so we create a simple factory function that
// accepts a sub-type as an argument.
// ```
// factory: function(t) { return internalType.ɵfac(t); }
// ```
return createFactoryFunction(internalType);
}
// The internalType is actually wrapped in a `forwardRef()` so we need to resolve that before
// calling its factory.
// ```
// factory: function(t) { return core.resolveForwardRef(type).ɵfac(t); }
// ```
var unwrappedType = o.importExpr(r3_identifiers_1.Identifiers.resolveForwardRef).callFn([internalType]);
return createFactoryFunction(unwrappedType);
}
function createFactoryFunction(type) {
return o.fn([new o.FnParam('t', o.DYNAMIC_TYPE)], [new o.ReturnStatement(type.callMethod('ɵfac', [o.variable('t')]))]);
}
});
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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 * as o from './output/output_ast';\nimport {generateForwardRef} from './render3/partial/util';\nimport {compileFactoryFunction, FactoryTarget, R3DependencyMetadata, R3FactoryDelegateType, R3FactoryMetadata} from './render3/r3_factory';\nimport {Identifiers} from './render3/r3_identifiers';\nimport {R3CompiledExpression, R3Reference, typeWithParameters} from './render3/util';\nimport {DefinitionMap} from './render3/view/util';\n\nexport interface R3InjectableMetadata {\n  name: string;\n  type: R3Reference;\n  internalType: o.Expression;\n  typeArgumentCount: number;\n  providedIn: R3ProviderExpression;\n  useClass?: R3ProviderExpression;\n  useFactory?: o.Expression;\n  useExisting?: R3ProviderExpression;\n  useValue?: R3ProviderExpression;\n  deps?: R3DependencyMetadata[];\n}\n\n/**\n * An expression used when instantiating an injectable.\n *\n * This is the type of the `useClass`, `useExisting` and `useValue` properties of\n * `R3InjectableMetadata` since those can refer to types that may eagerly reference types that have\n * not yet been defined.\n */\nexport interface R3ProviderExpression<T extends o.Expression = o.Expression> {\n  /**\n   * The expression that is used to instantiate the Injectable.\n   */\n  expression: T;\n  /**\n   * If true, then the `expression` contains a reference to something that has not yet been\n   * defined.\n   *\n   * This means that the expression must not be eagerly evaluated. Instead it must be wrapped in a\n   * function closure that will be evaluated lazily to allow the definition of the expression to be\n   * evaluated first.\n   *\n   * In some cases the expression will naturally be placed inside such a function closure, such as\n   * in a fully compiled factory function. In those case nothing more needs to be done.\n   *\n   * But in other cases, such as partial-compilation the expression will be located in top level\n   * code so will need to be wrapped in a function that is passed to a `forwardRef()` call.\n   */\n  isForwardRef: boolean;\n}\n\nexport function createR3ProviderExpression<T extends o.Expression>(\n    expression: T, isForwardRef: boolean): R3ProviderExpression<T> {\n  return {expression, isForwardRef};\n}\n\nexport function compileInjectable(\n    meta: R3InjectableMetadata, resolveForwardRefs: boolean): R3CompiledExpression {\n  let result: {expression: o.Expression, statements: o.Statement[]}|null = null;\n\n  const factoryMeta: R3FactoryMetadata = {\n    name: meta.name,\n    type: meta.type,\n    internalType: meta.internalType,\n    typeArgumentCount: meta.typeArgumentCount,\n    deps: [],\n    target: FactoryTarget.Injectable,\n  };\n\n  if (meta.useClass !== undefined) {\n    // meta.useClass has two modes of operation. Either deps are specified, in which case `new` is\n    // used to instantiate the class with dependencies injected, or deps are not specified and\n    // the factory of the class is used to instantiate it.\n    //\n    // A special case exists for useClass: Type where Type is the injectable type itself and no\n    // deps are specified, in which case 'useClass' is effectively ignored.\n\n    const useClassOnSelf = meta.useClass.expression.isEquivalent(meta.internalType);\n    let deps: R3DependencyMetadata[]|undefined = undefined;\n    if (meta.deps !== undefined) {\n      deps = meta.deps;\n    }\n\n    if (deps !== undefined) {\n      // factory: () => new meta.useClass(...deps)\n      result = compileFactoryFunction({\n        ...factoryMeta,\n        delegate: meta.useClass.expression,\n        delegateDeps: deps,\n        delegateType: R3FactoryDelegateType.Class,\n      });\n    } else if (useClassOnSelf) {\n      result = compileFactoryFunction(factoryMeta);\n    } else {\n      result = {\n        statements: [],\n        expression: delegateToFactory(\n            meta.type.value as o.WrappedNodeExpr<any>,\n            meta.useClass.expression as o.WrappedNodeExpr<any>, resolveForwardRefs)\n      };\n    }\n  } else if (meta.useFactory !== undefined) {\n    if (meta.deps !== undefined) {\n      result = compileFactoryFunction({\n        ...factoryMeta,\n        delegate: meta.useFactory,\n        delegateDeps: meta.deps || [],\n        delegateType: R3FactoryDelegateType.Function,\n      });\n    } else {\n      result = {\n        statements: [],\n        expression: o.fn([], [new o.ReturnStatement(meta.useFactory.callFn([]))])\n      };\n    }\n  } else if (meta.useValue !== undefined) {\n    // Note: it's safe to use `meta.useValue` instead of the `USE_VALUE in meta` check used for\n    // client code because meta.useValue is an Expression which will be defined even if the actual\n    // value is undefined.\n    result = compileFactoryFunction({\n      ...factoryMeta,\n      expression: meta.useValue.expression,\n    });\n  } else if (meta.useExisting !== undefined) {\n    // useExisting is an `inject` call on the existing token.\n    result = compileFactoryFunction({\n      ...factoryMeta,\n      expression: o.importExpr(Identifiers.inject).callFn([meta.useExisting.expression]),\n    });\n  } else {\n    result = {\n      statements: [],\n      expression: delegateToFactory(\n          meta.type.value as o.WrappedNodeExpr<any>, meta.internalType as o.WrappedNodeExpr<any>,\n          resolveForwardRefs)\n    };\n  }\n\n  const token = meta.internalType;\n\n  const injectableProps =\n      new DefinitionMap<{token: o.Expression, factory: o.Expression, providedIn: o.Expression}>();\n  injectableProps.set('token', token);\n  injectableProps.set('factory', result.expression);\n\n  // Only generate providedIn property if it has a non-null value\n  if ((meta.providedIn.expression as o.LiteralExpr).value !== null) {\n    injectableProps.set(\n        'providedIn',\n        meta.providedIn.isForwardRef ? generateForwardRef(meta.providedIn.expression) :\n                                       meta.providedIn.expression);\n  }\n\n  const expression = o.importExpr(Identifiers.ɵɵdefineInjectable)\n                         .callFn([injectableProps.toLiteralMap()], undefined, true);\n  return {\n    expression,\n    type: createInjectableType(meta),\n    statements: result.statements,\n  };\n}\n\nexport function createInjectableType(meta: R3InjectableMetadata) {\n  return new o.ExpressionType(o.importExpr(\n      Identifiers.InjectableDeclaration,\n      [typeWithParameters(meta.type.type, meta.typeArgumentCount)]));\n}\n\nfunction delegateToFactory(\n    type: o.WrappedNodeExpr<any>, internalType: o.WrappedNodeExpr<any>,\n    unwrapForwardRefs: boolean): o.Expression {\n  if (type.node === internalType.node) {\n    // The types are the same, so we can simply delegate directly to the type's factory.\n    // ```\n    // factory: type.ɵfac\n    // ```\n    return internalType.prop('ɵfac');\n  }\n\n  if (!unwrapForwardRefs) {\n    // The type is not wrapped in a `forwardRef()`, so we create a simple factory function that\n    // accepts a sub-type as an argument.\n    // ```\n    // factory: function(t) { return internalType.ɵfac(t); }\n    // ```\n    return createFactoryFunction(internalType);\n  }\n\n  // The internalType is actually wrapped in a `forwardRef()` so we need to resolve that before\n  // calling its factory.\n  // ```\n  // factory: function(t) { return core.resolveForwardRef(type).ɵfac(t); }\n  // ```\n  const unwrappedType = o.importExpr(Identifiers.resolveForwardRef).callFn([internalType]);\n  return createFactoryFunction(unwrappedType);\n}\n\nfunction createFactoryFunction(type: o.Expression): o.FunctionExpr {\n  return o.fn(\n      [new o.FnParam('t', o.DYNAMIC_TYPE)],\n      [new o.ReturnStatement(type.callMethod('ɵfac', [o.variable('t')]))]);\n}\n"]}