@angular/common
Version:
Angular - commonly needed directives and services
253 lines • 27.4 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 * as tslib_1 from "tslib";
import { EventEmitter, Injectable } from '@angular/core';
import { LocationStrategy } from './location_strategy';
import { PlatformLocation } from './platform_location';
/**
* @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
*
* <code-example path='common/location/ts/path_location_component.ts'
* region='LocationComponent'></code-example>
*
* @publicApi
*/
var Location = /** @class */ (function () {
function Location(platformStrategy, platformLocation) {
var _this = this;
/** @internal */
this._subject = new EventEmitter();
/** @internal */
this._urlChangeListeners = [];
this._platformStrategy = platformStrategy;
var browserBaseHref = this._platformStrategy.getBaseHref();
this._platformLocation = platformLocation;
this._baseHref = Location_1.stripTrailingSlash(_stripIndexHtml(browserBaseHref));
this._platformStrategy.onPopState(function (ev) {
_this._subject.emit({
'url': _this.path(true),
'pop': true,
'state': ev.state,
'type': ev.type,
});
});
}
Location_1 = Location;
/**
* 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.
Location.prototype.path = function (includeHash) {
if (includeHash === void 0) { includeHash = false; }
return this.normalize(this._platformStrategy.path(includeHash));
};
/**
* Reports the current state of the location history.
* @returns The current value of the `history.state` object.
*/
Location.prototype.getState = function () { return this._platformLocation.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.
*/
Location.prototype.isCurrentPathEqualTo = function (path, query) {
if (query === void 0) { query = ''; }
return this.path() == this.normalize(path + Location_1.normalizeQueryParams(query));
};
/**
* Normalizes a URL path by stripping any trailing slashes.
*
* @param url String representing a URL.
*
* @returns The normalized URL string.
*/
Location.prototype.normalize = function (url) {
return Location_1.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.
*/
Location.prototype.prepareExternalUrl = function (url) {
if (url && url[0] !== '/') {
url = '/' + url;
}
return this._platformStrategy.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.
*
*/
Location.prototype.go = function (path, query, state) {
if (query === void 0) { query = ''; }
if (state === void 0) { state = null; }
this._platformStrategy.pushState(state, '', path, query);
this._notifyUrlChangeListeners(this.prepareExternalUrl(path + Location_1.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.
*/
Location.prototype.replaceState = function (path, query, state) {
if (query === void 0) { query = ''; }
if (state === void 0) { state = null; }
this._platformStrategy.replaceState(state, '', path, query);
this._notifyUrlChangeListeners(this.prepareExternalUrl(path + Location_1.normalizeQueryParams(query)), state);
};
/**
* Navigates forward in the platform's history.
*/
Location.prototype.forward = function () { this._platformStrategy.forward(); };
/**
* Navigates back in the platform's history.
*/
Location.prototype.back = function () { this._platformStrategy.back(); };
/**
* 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.
*/
Location.prototype.onUrlChange = function (fn) {
var _this = this;
this._urlChangeListeners.push(fn);
this.subscribe(function (v) { _this._notifyUrlChangeListeners(v.url, v.state); });
};
/** @internal */
Location.prototype._notifyUrlChangeListeners = function (url, state) {
if (url === void 0) { url = ''; }
this._urlChangeListeners.forEach(function (fn) { return fn(url, state); });
};
/**
* Subscribes to the platform's `popState` events.
*
* @param value Event that is triggered when the state history changes.
* @param exception The exception to throw.
*
* @returns Subscribed events.
*/
Location.prototype.subscribe = function (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 = function (params) {
return params && params[0] !== '?' ? '?' + params : params;
};
/**
* 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 = function (start, end) {
if (start.length == 0) {
return end;
}
if (end.length == 0) {
return start;
}
var slashes = 0;
if (start.endsWith('/')) {
slashes++;
}
if (end.startsWith('/')) {
slashes++;
}
if (slashes == 2) {
return start + end.substring(1);
}
if (slashes == 1) {
return start + end;
}
return start + '/' + end;
};
/**
* 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 = function (url) {
var match = url.match(/#|\?|$/);
var pathEndIdx = match && match.index || url.length;
var droppedSlashIdx = pathEndIdx - (url[pathEndIdx - 1] === '/' ? 1 : 0);
return url.slice(0, droppedSlashIdx) + url.slice(pathEndIdx);
};
var Location_1;
Location = Location_1 = tslib_1.__decorate([
Injectable(),
tslib_1.__metadata("design:paramtypes", [LocationStrategy, PlatformLocation])
], Location);
return Location;
}());
export { Location };
function _stripBaseHref(baseHref, url) {
return baseHref && url.startsWith(baseHref) ? url.substring(baseHref.length) : url;
}
function _stripIndexHtml(url) {
return url.replace(/\/index.html$/, '');
}
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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} from '@angular/core';\nimport {SubscriptionLike} from 'rxjs';\n\nimport {LocationStrategy} from './location_strategy';\nimport {PlatformLocation} from './platform_location';\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()\nexport class Location {\n  /** @internal */\n  _subject: EventEmitter<any> = new EventEmitter();\n  /** @internal */\n  _baseHref: string;\n  /** @internal */\n  _platformStrategy: LocationStrategy;\n  /** @internal */\n  _platformLocation: PlatformLocation;\n  /** @internal */\n  _urlChangeListeners: ((url: string, state: unknown) => void)[] = [];\n\n  constructor(platformStrategy: LocationStrategy, platformLocation: PlatformLocation) {\n    this._platformStrategy = platformStrategy;\n    const browserBaseHref = this._platformStrategy.getBaseHref();\n    this._platformLocation = platformLocation;\n    this._baseHref = Location.stripTrailingSlash(_stripIndexHtml(browserBaseHref));\n    this._platformStrategy.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  /**\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._platformStrategy.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 { return this._platformLocation.getState(); }\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 + Location.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._platformStrategy.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._platformStrategy.pushState(state, '', path, query);\n    this._notifyUrlChangeListeners(\n        this.prepareExternalUrl(path + Location.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._platformStrategy.replaceState(state, '', path, query);\n    this._notifyUrlChangeListeners(\n        this.prepareExternalUrl(path + Location.normalizeQueryParams(query)), state);\n  }\n\n  /**\n   * Navigates forward in the platform's history.\n   */\n  forward(): void { this._platformStrategy.forward(); }\n\n  /**\n   * Navigates back in the platform's history.\n   */\n  back(): void { this._platformStrategy.back(); }\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   */\n  onUrlChange(fn: (url: string, state: unknown) => void) {\n    this._urlChangeListeners.push(fn);\n    this.subscribe(v => { this._notifyUrlChangeListeners(v.url, v.state); });\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   * @param value Event that is triggered when the state history changes.\n   * @param exception The exception to throw.\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 {\n    return params && params[0] !== '?' ? '?' + params : params;\n  }\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 {\n    if (start.length == 0) {\n      return end;\n    }\n    if (end.length == 0) {\n      return start;\n    }\n    let slashes = 0;\n    if (start.endsWith('/')) {\n      slashes++;\n    }\n    if (end.startsWith('/')) {\n      slashes++;\n    }\n    if (slashes == 2) {\n      return start + end.substring(1);\n    }\n    if (slashes == 1) {\n      return start + end;\n    }\n    return start + '/' + end;\n  }\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 {\n    const match = url.match(/#|\\?|$/);\n    const pathEndIdx = match && match.index || url.length;\n    const droppedSlashIdx = pathEndIdx - (url[pathEndIdx - 1] === '/' ? 1 : 0);\n    return url.slice(0, droppedSlashIdx) + url.slice(pathEndIdx);\n  }\n}\n\nfunction _stripBaseHref(baseHref: string, url: string): string {\n  return baseHref && url.startsWith(baseHref) ? url.substring(baseHref.length) : url;\n}\n\nfunction _stripIndexHtml(url: string): string {\n  return url.replace(/\\/index.html$/, '');\n}\n"]}