104 lines
3.0 KiB
TypeScript
104 lines
3.0 KiB
TypeScript
import {Injectable, Inject, Optional} from '@angular/core';
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import {isPresent} from '../../src/facade/lang';
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import {LocationStrategy, APP_BASE_HREF} from './location_strategy';
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import {Location} from './location';
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import {UrlChangeListener, PlatformLocation} from './platform_location';
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/**
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* `HashLocationStrategy` is a {@link LocationStrategy} used to configure the
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* {@link Location} service to represent its state in the
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* [hash fragment](https://en.wikipedia.org/wiki/Uniform_Resource_Locator#Syntax)
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* of the browser's URL.
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*
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* For instance, if you call `location.go('/foo')`, the browser's URL will become
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* `example.com#/foo`.
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*
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* ### Example
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*
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* ```
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* import {Component, provide} from '@angular/core';
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* import {
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* Location,
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* LocationStrategy,
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* HashLocationStrategy
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* } from '@angular/common';
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* import {
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* ROUTER_DIRECTIVES,
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* ROUTER_PROVIDERS,
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* RouteConfig
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* } from '@angular/router';
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*
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* @Component({directives: [ROUTER_DIRECTIVES]})
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* @RouteConfig([
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* {...},
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* ])
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* class AppCmp {
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* constructor(location: Location) {
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* location.go('/foo');
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* }
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* }
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*
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* bootstrap(AppCmp, [
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* ROUTER_PROVIDERS,
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* provide(LocationStrategy, {useClass: HashLocationStrategy})
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* ]);
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* ```
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*/
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@Injectable()
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export class HashLocationStrategy extends LocationStrategy {
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private _baseHref: string = '';
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constructor(private _platformLocation: PlatformLocation,
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@Optional() @Inject(APP_BASE_HREF) _baseHref?: string) {
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super();
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if (isPresent(_baseHref)) {
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this._baseHref = _baseHref;
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}
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}
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onPopState(fn: UrlChangeListener): void {
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this._platformLocation.onPopState(fn);
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this._platformLocation.onHashChange(fn);
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}
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getBaseHref(): string { return this._baseHref; }
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path(): string {
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// the hash value is always prefixed with a `#`
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// and if it is empty then it will stay empty
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var path = this._platformLocation.hash;
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if (!isPresent(path)) path = '#';
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// Dart will complain if a call to substring is
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// executed with a position value that extends the
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// length of string.
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return (path.length > 0 ? path.substring(1) : path);
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}
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prepareExternalUrl(internal: string): string {
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var url = Location.joinWithSlash(this._baseHref, internal);
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return url.length > 0 ? ('#' + url) : url;
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}
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pushState(state: any, title: string, path: string, queryParams: string) {
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var url = this.prepareExternalUrl(path + Location.normalizeQueryParams(queryParams));
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if (url.length == 0) {
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url = this._platformLocation.pathname;
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}
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this._platformLocation.pushState(state, title, url);
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}
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replaceState(state: any, title: string, path: string, queryParams: string) {
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var url = this.prepareExternalUrl(path + Location.normalizeQueryParams(queryParams));
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if (url.length == 0) {
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url = this._platformLocation.pathname;
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}
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this._platformLocation.replaceState(state, title, url);
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}
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forward(): void { this._platformLocation.forward(); }
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back(): void { this._platformLocation.back(); }
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}
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