/** * @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 { EventEmitter, Injectable, ɵɵinject } from '@angular/core'; import { LocationStrategy } from './location_strategy'; import { joinWithSlash, normalizeQueryParams, stripTrailingSlash } from './util'; import * as i0 from "@angular/core"; import * as i1 from "./location_strategy"; /** * @description * * A service that applications can use to interact with a browser's URL. * * Depending on the `LocationStrategy` used, `Location` persists * to the URL's path or the URL's hash segment. * * @usageNotes * * It's better to use the `Router.navigate()` service to trigger route changes. Use * `Location` only if you need to interact with or create normalized URLs outside of * routing. * * `Location` is responsible for normalizing the URL against the application's base href. * A normalized URL is absolute from the URL host, includes the application's base href, and has no * trailing slash: * - `/my/app/user/123` is normalized * - `my/app/user/123` **is not** normalized * - `/my/app/user/123/` **is not** normalized * * ### Example * * * * @publicApi */ export class Location { constructor(locationStrategy) { /** @internal */ this._subject = new EventEmitter(); /** @internal */ this._urlChangeListeners = []; /** @internal */ this._urlChangeSubscription = null; this._locationStrategy = locationStrategy; const browserBaseHref = this._locationStrategy.getBaseHref(); this._baseHref = stripTrailingSlash(_stripIndexHtml(browserBaseHref)); this._locationStrategy.onPopState((ev) => { this._subject.emit({ 'url': this.path(true), 'pop': true, 'state': ev.state, 'type': ev.type, }); }); } /** @nodoc */ ngOnDestroy() { this._urlChangeSubscription?.unsubscribe(); this._urlChangeListeners = []; } /** * Normalizes the URL path for this location. * * @param includeHash True to include an anchor fragment in the path. * * @returns The normalized URL path. */ // TODO: vsavkin. Remove the boolean flag and always include hash once the deprecated router is // removed. path(includeHash = false) { return this.normalize(this._locationStrategy.path(includeHash)); } /** * Reports the current state of the location history. * @returns The current value of the `history.state` object. */ getState() { return this._locationStrategy.getState(); } /** * Normalizes the given path and compares to the current normalized path. * * @param path The given URL path. * @param query Query parameters. * * @returns True if the given URL path is equal to the current normalized path, false * otherwise. */ isCurrentPathEqualTo(path, query = '') { return this.path() == this.normalize(path + normalizeQueryParams(query)); } /** * Normalizes a URL path by stripping any trailing slashes. * * @param url String representing a URL. * * @returns The normalized URL string. */ normalize(url) { return Location.stripTrailingSlash(_stripBaseHref(this._baseHref, _stripIndexHtml(url))); } /** * Normalizes an external URL path. * If the given URL doesn't begin with a leading slash (`'/'`), adds one * before normalizing. Adds a hash if `HashLocationStrategy` is * in use, or the `APP_BASE_HREF` if the `PathLocationStrategy` is in use. * * @param url String representing a URL. * * @returns A normalized platform-specific URL. */ prepareExternalUrl(url) { if (url && url[0] !== '/') { url = '/' + url; } return this._locationStrategy.prepareExternalUrl(url); } // TODO: rename this method to pushState /** * Changes the browser's URL to a normalized version of a given URL, and pushes a * new item onto the platform's history. * * @param path URL path to normalize. * @param query Query parameters. * @param state Location history state. * */ go(path, query = '', state = null) { this._locationStrategy.pushState(state, '', path, query); this._notifyUrlChangeListeners(this.prepareExternalUrl(path + normalizeQueryParams(query)), state); } /** * Changes the browser's URL to a normalized version of the given URL, and replaces * the top item on the platform's history stack. * * @param path URL path to normalize. * @param query Query parameters. * @param state Location history state. */ replaceState(path, query = '', state = null) { this._locationStrategy.replaceState(state, '', path, query); this._notifyUrlChangeListeners(this.prepareExternalUrl(path + normalizeQueryParams(query)), state); } /** * Navigates forward in the platform's history. */ forward() { this._locationStrategy.forward(); } /** * Navigates back in the platform's history. */ back() { this._locationStrategy.back(); } /** * Navigate to a specific page from session history, identified by its relative position to the * current page. * * @param relativePosition Position of the target page in the history relative to the current * page. * A negative value moves backwards, a positive value moves forwards, e.g. `location.historyGo(2)` * moves forward two pages and `location.historyGo(-2)` moves back two pages. When we try to go * beyond what's stored in the history session, we stay in the current page. Same behaviour occurs * when `relativePosition` equals 0. * @see https://developer.mozilla.org/en-US/docs/Web/API/History_API#Moving_to_a_specific_point_in_history */ historyGo(relativePosition = 0) { this._locationStrategy.historyGo?.(relativePosition); } /** * Registers a URL change listener. Use to catch updates performed by the Angular * framework that are not detectible through "popstate" or "hashchange" events. * * @param fn The change handler function, which take a URL and a location history state. * @returns A function that, when executed, unregisters a URL change listener. */ onUrlChange(fn) { this._urlChangeListeners.push(fn); if (!this._urlChangeSubscription) { this._urlChangeSubscription = this.subscribe(v => { this._notifyUrlChangeListeners(v.url, v.state); }); } return () => { const fnIndex = this._urlChangeListeners.indexOf(fn); this._urlChangeListeners.splice(fnIndex, 1); if (this._urlChangeListeners.length === 0) { this._urlChangeSubscription?.unsubscribe(); this._urlChangeSubscription = null; } }; } /** @internal */ _notifyUrlChangeListeners(url = '', state) { this._urlChangeListeners.forEach(fn => fn(url, state)); } /** * Subscribes to the platform's `popState` events. * * Note: `Location.go()` does not trigger the `popState` event in the browser. Use * `Location.onUrlChange()` to subscribe to URL changes instead. * * @param value Event that is triggered when the state history changes. * @param exception The exception to throw. * * @see [onpopstate](https://developer.mozilla.org/en-US/docs/Web/API/WindowEventHandlers/onpopstate) * * @returns Subscribed events. */ subscribe(onNext, onThrow, onReturn) { return this._subject.subscribe({ next: onNext, error: onThrow, complete: onReturn }); } } /** * Normalizes URL parameters by prepending with `?` if needed. * * @param params String of URL parameters. * * @returns The normalized URL parameters string. */ Location.normalizeQueryParams = normalizeQueryParams; /** * Joins two parts of a URL with a slash if needed. * * @param start URL string * @param end URL string * * * @returns The joined URL string. */ Location.joinWithSlash = joinWithSlash; /** * Removes a trailing slash from a URL string if needed. * Looks for the first occurrence of either `#`, `?`, or the end of the * line as `/` characters and removes the trailing slash if one exists. * * @param url URL string. * * @returns The URL string, modified if needed. */ Location.stripTrailingSlash = stripTrailingSlash; Location.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "14.2.8", ngImport: i0, type: Location, deps: [{ token: i1.LocationStrategy }], target: i0.ɵɵFactoryTarget.Injectable }); Location.ɵprov = i0.ɵɵngDeclareInjectable({ minVersion: "12.0.0", version: "14.2.8", ngImport: i0, type: Location, providedIn: 'root', useFactory: createLocation }); i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "14.2.8", ngImport: i0, type: Location, decorators: [{ type: Injectable, args: [{ providedIn: 'root', // See #23917 useFactory: createLocation, }] }], ctorParameters: function () { return [{ type: i1.LocationStrategy }]; } }); export function createLocation() { return new Location(ɵɵinject(LocationStrategy)); } function _stripBaseHref(baseHref, url) { return baseHref && url.startsWith(baseHref) ? url.substring(baseHref.length) : url; } function _stripIndexHtml(url) { return url.replace(/\/index.html$/, ''); } //# 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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 {EventEmitter, Injectable, OnDestroy, ɵɵinject} from '@angular/core';\nimport {SubscriptionLike} from 'rxjs';\n\nimport {LocationStrategy} from './location_strategy';\nimport {joinWithSlash, normalizeQueryParams, stripTrailingSlash} from './util';\n\n/** @publicApi */\nexport interface PopStateEvent {\n  pop?: boolean;\n  state?: any;\n  type?: string;\n  url?: string;\n}\n\n/**\n * @description\n *\n * A service that applications can use to interact with a browser's URL.\n *\n * Depending on the `LocationStrategy` used, `Location` persists\n * to the URL's path or the URL's hash segment.\n *\n * @usageNotes\n *\n * It's better to use the `Router.navigate()` service to trigger route changes. Use\n * `Location` only if you need to interact with or create normalized URLs outside of\n * routing.\n *\n * `Location` is responsible for normalizing the URL against the application's base href.\n * A normalized URL is absolute from the URL host, includes the application's base href, and has no\n * trailing slash:\n * - `/my/app/user/123` is normalized\n * - `my/app/user/123` **is not** normalized\n * - `/my/app/user/123/` **is not** normalized\n *\n * ### Example\n *\n * <code-example path='common/location/ts/path_location_component.ts'\n * region='LocationComponent'></code-example>\n *\n * @publicApi\n */\n@Injectable({\n  providedIn: 'root',\n  // See #23917\n  useFactory: createLocation,\n})\nexport class Location implements OnDestroy {\n  /** @internal */\n  _subject: EventEmitter<any> = new EventEmitter();\n  /** @internal */\n  _baseHref: string;\n  /** @internal */\n  _locationStrategy: LocationStrategy;\n  /** @internal */\n  _urlChangeListeners: ((url: string, state: unknown) => void)[] = [];\n  /** @internal */\n  _urlChangeSubscription: SubscriptionLike|null = null;\n\n  constructor(locationStrategy: LocationStrategy) {\n    this._locationStrategy = locationStrategy;\n    const browserBaseHref = this._locationStrategy.getBaseHref();\n    this._baseHref = stripTrailingSlash(_stripIndexHtml(browserBaseHref));\n    this._locationStrategy.onPopState((ev) => {\n      this._subject.emit({\n        'url': this.path(true),\n        'pop': true,\n        'state': ev.state,\n        'type': ev.type,\n      });\n    });\n  }\n\n  /** @nodoc */\n  ngOnDestroy(): void {\n    this._urlChangeSubscription?.unsubscribe();\n    this._urlChangeListeners = [];\n  }\n\n  /**\n   * Normalizes the URL path for this location.\n   *\n   * @param includeHash True to include an anchor fragment in the path.\n   *\n   * @returns The normalized URL path.\n   */\n  // TODO: vsavkin. Remove the boolean flag and always include hash once the deprecated router is\n  // removed.\n  path(includeHash: boolean = false): string {\n    return this.normalize(this._locationStrategy.path(includeHash));\n  }\n\n  /**\n   * Reports the current state of the location history.\n   * @returns The current value of the `history.state` object.\n   */\n  getState(): unknown {\n    return this._locationStrategy.getState();\n  }\n\n  /**\n   * Normalizes the given path and compares to the current normalized path.\n   *\n   * @param path The given URL path.\n   * @param query Query parameters.\n   *\n   * @returns True if the given URL path is equal to the current normalized path, false\n   * otherwise.\n   */\n  isCurrentPathEqualTo(path: string, query: string = ''): boolean {\n    return this.path() == this.normalize(path + normalizeQueryParams(query));\n  }\n\n  /**\n   * Normalizes a URL path by stripping any trailing slashes.\n   *\n   * @param url String representing a URL.\n   *\n   * @returns The normalized URL string.\n   */\n  normalize(url: string): string {\n    return Location.stripTrailingSlash(_stripBaseHref(this._baseHref, _stripIndexHtml(url)));\n  }\n\n  /**\n   * Normalizes an external URL path.\n   * If the given URL doesn't begin with a leading slash (`'/'`), adds one\n   * before normalizing. Adds a hash if `HashLocationStrategy` is\n   * in use, or the `APP_BASE_HREF` if the `PathLocationStrategy` is in use.\n   *\n   * @param url String representing a URL.\n   *\n   * @returns  A normalized platform-specific URL.\n   */\n  prepareExternalUrl(url: string): string {\n    if (url && url[0] !== '/') {\n      url = '/' + url;\n    }\n    return this._locationStrategy.prepareExternalUrl(url);\n  }\n\n  // TODO: rename this method to pushState\n  /**\n   * Changes the browser's URL to a normalized version of a given URL, and pushes a\n   * new item onto the platform's history.\n   *\n   * @param path  URL path to normalize.\n   * @param query Query parameters.\n   * @param state Location history state.\n   *\n   */\n  go(path: string, query: string = '', state: any = null): void {\n    this._locationStrategy.pushState(state, '', path, query);\n    this._notifyUrlChangeListeners(\n        this.prepareExternalUrl(path + normalizeQueryParams(query)), state);\n  }\n\n  /**\n   * Changes the browser's URL to a normalized version of the given URL, and replaces\n   * the top item on the platform's history stack.\n   *\n   * @param path  URL path to normalize.\n   * @param query Query parameters.\n   * @param state Location history state.\n   */\n  replaceState(path: string, query: string = '', state: any = null): void {\n    this._locationStrategy.replaceState(state, '', path, query);\n    this._notifyUrlChangeListeners(\n        this.prepareExternalUrl(path + normalizeQueryParams(query)), state);\n  }\n\n  /**\n   * Navigates forward in the platform's history.\n   */\n  forward(): void {\n    this._locationStrategy.forward();\n  }\n\n  /**\n   * Navigates back in the platform's history.\n   */\n  back(): void {\n    this._locationStrategy.back();\n  }\n\n  /**\n   * Navigate to a specific page from session history, identified by its relative position to the\n   * current page.\n   *\n   * @param relativePosition  Position of the target page in the history relative to the current\n   *     page.\n   * A negative value moves backwards, a positive value moves forwards, e.g. `location.historyGo(2)`\n   * moves forward two pages and `location.historyGo(-2)` moves back two pages. When we try to go\n   * beyond what's stored in the history session, we stay in the current page. Same behaviour occurs\n   * when `relativePosition` equals 0.\n   * @see https://developer.mozilla.org/en-US/docs/Web/API/History_API#Moving_to_a_specific_point_in_history\n   */\n  historyGo(relativePosition: number = 0): void {\n    this._locationStrategy.historyGo?.(relativePosition);\n  }\n\n  /**\n   * Registers a URL change listener. Use to catch updates performed by the Angular\n   * framework that are not detectible through \"popstate\" or \"hashchange\" events.\n   *\n   * @param fn The change handler function, which take a URL and a location history state.\n   * @returns A function that, when executed, unregisters a URL change listener.\n   */\n  onUrlChange(fn: (url: string, state: unknown) => void): VoidFunction {\n    this._urlChangeListeners.push(fn);\n\n    if (!this._urlChangeSubscription) {\n      this._urlChangeSubscription = this.subscribe(v => {\n        this._notifyUrlChangeListeners(v.url, v.state);\n      });\n    }\n\n    return () => {\n      const fnIndex = this._urlChangeListeners.indexOf(fn);\n      this._urlChangeListeners.splice(fnIndex, 1);\n\n      if (this._urlChangeListeners.length === 0) {\n        this._urlChangeSubscription?.unsubscribe();\n        this._urlChangeSubscription = null;\n      }\n    };\n  }\n\n  /** @internal */\n  _notifyUrlChangeListeners(url: string = '', state: unknown) {\n    this._urlChangeListeners.forEach(fn => fn(url, state));\n  }\n\n  /**\n   * Subscribes to the platform's `popState` events.\n   *\n   * Note: `Location.go()` does not trigger the `popState` event in the browser. Use\n   * `Location.onUrlChange()` to subscribe to URL changes instead.\n   *\n   * @param value Event that is triggered when the state history changes.\n   * @param exception The exception to throw.\n   *\n   * @see [onpopstate](https://developer.mozilla.org/en-US/docs/Web/API/WindowEventHandlers/onpopstate)\n   *\n   * @returns Subscribed events.\n   */\n  subscribe(\n      onNext: (value: PopStateEvent) => void, onThrow?: ((exception: any) => void)|null,\n      onReturn?: (() => void)|null): SubscriptionLike {\n    return this._subject.subscribe({next: onNext, error: onThrow, complete: onReturn});\n  }\n\n  /**\n   * Normalizes URL parameters by prepending with `?` if needed.\n   *\n   * @param  params String of URL parameters.\n   *\n   * @returns The normalized URL parameters string.\n   */\n  public static normalizeQueryParams: (params: string) => string = normalizeQueryParams;\n\n  /**\n   * Joins two parts of a URL with a slash if needed.\n   *\n   * @param start  URL string\n   * @param end    URL string\n   *\n   *\n   * @returns The joined URL string.\n   */\n  public static joinWithSlash: (start: string, end: string) => string = joinWithSlash;\n\n  /**\n   * Removes a trailing slash from a URL string if needed.\n   * Looks for the first occurrence of either `#`, `?`, or the end of the\n   * line as `/` characters and removes the trailing slash if one exists.\n   *\n   * @param url URL string.\n   *\n   * @returns The URL string, modified if needed.\n   */\n  public static stripTrailingSlash: (url: string) => string = stripTrailingSlash;\n}\n\nexport function createLocation() {\n  return new Location(ɵɵinject(LocationStrategy as any));\n}\n\nfunction _stripBaseHref(baseHref: string, url: string): string {\n  return baseHref && url.startsWith(baseHref) ? url.substring(baseHref.length) : url;\n}\n\nfunction _stripIndexHtml(url: string): string {\n  return url.replace(/\\/index.html$/, '');\n}\n"]}