@angular/core
Version:
Angular - the core framework
199 lines • 15.3 kB
JavaScript
/**
* @fileoverview added by tsickle
* @suppress {checkTypes,extraRequire,missingOverride,missingReturn,unusedPrivateMembers,uselessCode} checked by tsc
*/
/**
* @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 { ɵstringify as stringify } from '@angular/core';
/** @type {?} */
let _nextReferenceId = 0;
export class MetadataOverrider {
constructor() {
this._references = new Map();
}
/**
* Creates a new instance for the given metadata class
* based on an old instance and overrides.
* @template C, T
* @param {?} metadataClass
* @param {?} oldMetadata
* @param {?} override
* @return {?}
*/
overrideMetadata(metadataClass, oldMetadata, override) {
/** @type {?} */
const props = {};
if (oldMetadata) {
_valueProps(oldMetadata).forEach((/**
* @param {?} prop
* @return {?}
*/
(prop) => props[prop] = ((/** @type {?} */ (oldMetadata)))[prop]));
}
if (override.set) {
if (override.remove || override.add) {
throw new Error(`Cannot set and add/remove ${stringify(metadataClass)} at the same time!`);
}
setMetadata(props, override.set);
}
if (override.remove) {
removeMetadata(props, override.remove, this._references);
}
if (override.add) {
addMetadata(props, override.add);
}
return new metadataClass((/** @type {?} */ (props)));
}
}
if (false) {
/**
* @type {?}
* @private
*/
MetadataOverrider.prototype._references;
}
/**
* @param {?} metadata
* @param {?} remove
* @param {?} references
* @return {?}
*/
function removeMetadata(metadata, remove, references) {
/** @type {?} */
const removeObjects = new Set();
for (const prop in remove) {
/** @type {?} */
const removeValue = remove[prop];
if (removeValue instanceof Array) {
removeValue.forEach((/**
* @param {?} value
* @return {?}
*/
(value) => { removeObjects.add(_propHashKey(prop, value, references)); }));
}
else {
removeObjects.add(_propHashKey(prop, removeValue, references));
}
}
for (const prop in metadata) {
/** @type {?} */
const propValue = metadata[prop];
if (propValue instanceof Array) {
metadata[prop] = propValue.filter((/**
* @param {?} value
* @return {?}
*/
(value) => !removeObjects.has(_propHashKey(prop, value, references))));
}
else {
if (removeObjects.has(_propHashKey(prop, propValue, references))) {
metadata[prop] = undefined;
}
}
}
}
/**
* @param {?} metadata
* @param {?} add
* @return {?}
*/
function addMetadata(metadata, add) {
for (const prop in add) {
/** @type {?} */
const addValue = add[prop];
/** @type {?} */
const propValue = metadata[prop];
if (propValue != null && propValue instanceof Array) {
metadata[prop] = propValue.concat(addValue);
}
else {
metadata[prop] = addValue;
}
}
}
/**
* @param {?} metadata
* @param {?} set
* @return {?}
*/
function setMetadata(metadata, set) {
for (const prop in set) {
metadata[prop] = set[prop];
}
}
/**
* @param {?} propName
* @param {?} propValue
* @param {?} references
* @return {?}
*/
function _propHashKey(propName, propValue, references) {
/** @type {?} */
const replacer = (/**
* @param {?} key
* @param {?} value
* @return {?}
*/
(key, value) => {
if (typeof value === 'function') {
value = _serializeReference(value, references);
}
return value;
});
return `${propName}:${JSON.stringify(propValue, replacer)}`;
}
/**
* @param {?} ref
* @param {?} references
* @return {?}
*/
function _serializeReference(ref, references) {
/** @type {?} */
let id = references.get(ref);
if (!id) {
id = `${stringify(ref)}${_nextReferenceId++}`;
references.set(ref, id);
}
return id;
}
/**
* @param {?} obj
* @return {?}
*/
function _valueProps(obj) {
/** @type {?} */
const props = [];
// regular public props
Object.keys(obj).forEach((/**
* @param {?} prop
* @return {?}
*/
(prop) => {
if (!prop.startsWith('_')) {
props.push(prop);
}
}));
// getters
/** @type {?} */
let proto = obj;
while (proto = Object.getPrototypeOf(proto)) {
Object.keys(proto).forEach((/**
* @param {?} protoProp
* @return {?}
*/
(protoProp) => {
/** @type {?} */
const desc = Object.getOwnPropertyDescriptor(proto, protoProp);
if (!protoProp.startsWith('_') && desc && 'get' in desc) {
props.push(protoProp);
}
}));
}
return props;
}
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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 {ɵstringify as stringify} from '@angular/core';\nimport {MetadataOverride} from './metadata_override';\n\ntype StringMap = {\n  [key: string]: any\n};\n\nlet _nextReferenceId = 0;\n\nexport class MetadataOverrider {\n  private _references = new Map<any, string>();\n  /**\n   * Creates a new instance for the given metadata class\n   * based on an old instance and overrides.\n   */\n  overrideMetadata<C extends T, T>(\n      metadataClass: {new (options: T): C;}, oldMetadata: C, override: MetadataOverride<T>): C {\n    const props: StringMap = {};\n    if (oldMetadata) {\n      _valueProps(oldMetadata).forEach((prop) => props[prop] = (<any>oldMetadata)[prop]);\n    }\n\n    if (override.set) {\n      if (override.remove || override.add) {\n        throw new Error(`Cannot set and add/remove ${stringify(metadataClass)} at the same time!`);\n      }\n      setMetadata(props, override.set);\n    }\n    if (override.remove) {\n      removeMetadata(props, override.remove, this._references);\n    }\n    if (override.add) {\n      addMetadata(props, override.add);\n    }\n    return new metadataClass(<any>props);\n  }\n}\n\nfunction removeMetadata(metadata: StringMap, remove: any, references: Map<any, string>) {\n  const removeObjects = new Set<string>();\n  for (const prop in remove) {\n    const removeValue = remove[prop];\n    if (removeValue instanceof Array) {\n      removeValue.forEach(\n          (value: any) => { removeObjects.add(_propHashKey(prop, value, references)); });\n    } else {\n      removeObjects.add(_propHashKey(prop, removeValue, references));\n    }\n  }\n\n  for (const prop in metadata) {\n    const propValue = metadata[prop];\n    if (propValue instanceof Array) {\n      metadata[prop] = propValue.filter(\n          (value: any) => !removeObjects.has(_propHashKey(prop, value, references)));\n    } else {\n      if (removeObjects.has(_propHashKey(prop, propValue, references))) {\n        metadata[prop] = undefined;\n      }\n    }\n  }\n}\n\nfunction addMetadata(metadata: StringMap, add: any) {\n  for (const prop in add) {\n    const addValue = add[prop];\n    const propValue = metadata[prop];\n    if (propValue != null && propValue instanceof Array) {\n      metadata[prop] = propValue.concat(addValue);\n    } else {\n      metadata[prop] = addValue;\n    }\n  }\n}\n\nfunction setMetadata(metadata: StringMap, set: any) {\n  for (const prop in set) {\n    metadata[prop] = set[prop];\n  }\n}\n\nfunction _propHashKey(propName: any, propValue: any, references: Map<any, string>): string {\n  const replacer = (key: any, value: any) => {\n    if (typeof value === 'function') {\n      value = _serializeReference(value, references);\n    }\n    return value;\n  };\n\n  return `${propName}:${JSON.stringify(propValue, replacer)}`;\n}\n\nfunction _serializeReference(ref: any, references: Map<any, string>): string {\n  let id = references.get(ref);\n  if (!id) {\n    id = `${stringify(ref)}${_nextReferenceId++}`;\n    references.set(ref, id);\n  }\n  return id;\n}\n\n\nfunction _valueProps(obj: any): string[] {\n  const props: string[] = [];\n  // regular public props\n  Object.keys(obj).forEach((prop) => {\n    if (!prop.startsWith('_')) {\n      props.push(prop);\n    }\n  });\n\n  // getters\n  let proto = obj;\n  while (proto = Object.getPrototypeOf(proto)) {\n    Object.keys(proto).forEach((protoProp) => {\n      const desc = Object.getOwnPropertyDescriptor(proto, protoProp);\n      if (!protoProp.startsWith('_') && desc && 'get' in desc) {\n        props.push(protoProp);\n      }\n    });\n  }\n  return props;\n}\n"]}