-
Notifications
You must be signed in to change notification settings - Fork 24.8k
/
router_state.ts
417 lines (370 loc) Β· 13.9 KB
/
router_state.ts
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
/**
* @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 {Type} from '@angular/core';
import {BehaviorSubject} from 'rxjs/BehaviorSubject';
import {Observable} from 'rxjs/Observable';
import {map} from 'rxjs/operator/map';
import {Data, ResolveData, Route} from './config';
import {PRIMARY_OUTLET, ParamMap, Params, convertToParamMap} from './shared';
import {UrlSegment, UrlSegmentGroup, UrlTree, equalSegments} from './url_tree';
import {shallowEqual, shallowEqualArrays} from './utils/collection';
import {Tree, TreeNode} from './utils/tree';
/**
* @whatItDoes Represents the state of the router.
*
* @howToUse
*
* ```
* @Component({templateUrl:'template.html'})
* class MyComponent {
* constructor(router: Router) {
* const state: RouterState = router.routerState;
* const root: ActivatedRoute = state.root;
* const child = root.firstChild;
* const id: Observable<string> = child.params.map(p => p.id);
* //...
* }
* }
* ```
*
* @description
* RouterState is a tree of activated routes. Every node in this tree knows about the "consumed" URL
* segments, the extracted parameters, and the resolved data.
*
* See {@link ActivatedRoute} for more information.
*
* @stable
*/
export class RouterState extends Tree<ActivatedRoute> {
/** @internal */
constructor(
root: TreeNode<ActivatedRoute>,
/** The current snapshot of the router state */
public snapshot: RouterStateSnapshot) {
super(root);
setRouterState(<RouterState>this, root);
}
toString(): string { return this.snapshot.toString(); }
}
export function createEmptyState(urlTree: UrlTree, rootComponent: Type<any>| null): RouterState {
const snapshot = createEmptyStateSnapshot(urlTree, rootComponent);
const emptyUrl = new BehaviorSubject([new UrlSegment('', {})]);
const emptyParams = new BehaviorSubject({});
const emptyData = new BehaviorSubject({});
const emptyQueryParams = new BehaviorSubject({});
const fragment = new BehaviorSubject('');
const activated = new ActivatedRoute(
emptyUrl, emptyParams, emptyQueryParams, fragment, emptyData, PRIMARY_OUTLET, rootComponent,
snapshot.root);
activated.snapshot = snapshot.root;
return new RouterState(new TreeNode<ActivatedRoute>(activated, []), snapshot);
}
export function createEmptyStateSnapshot(
urlTree: UrlTree, rootComponent: Type<any>| null): RouterStateSnapshot {
const emptyParams = {};
const emptyData = {};
const emptyQueryParams = {};
const fragment = '';
const activated = new ActivatedRouteSnapshot(
[], emptyParams, emptyQueryParams, fragment, emptyData, PRIMARY_OUTLET, rootComponent, null,
urlTree.root, -1, {});
return new RouterStateSnapshot('', new TreeNode<ActivatedRouteSnapshot>(activated, []));
}
/**
* @whatItDoes Contains the information about a route associated with a component loaded in an
* outlet.
* An `ActivatedRoute` can also be used to traverse the router state tree.
*
* @howToUse
*
* ```
* @Component({...})
* class MyComponent {
* constructor(route: ActivatedRoute) {
* const id: Observable<string> = route.params.map(p => p.id);
* const url: Observable<string> = route.url.map(segments => segments.join(''));
* // route.data includes both `data` and `resolve`
* const user = route.data.map(d => d.user);
* }
* }
* ```
*
* @stable
*/
export class ActivatedRoute {
/** The current snapshot of this route */
snapshot: ActivatedRouteSnapshot;
/** @internal */
_futureSnapshot: ActivatedRouteSnapshot;
/** @internal */
_routerState: RouterState;
/** @internal */
_paramMap: Observable<ParamMap>;
/** @internal */
_queryParamMap: Observable<ParamMap>;
/** @internal */
constructor(
/** An observable of the URL segments matched by this route */
public url: Observable<UrlSegment[]>,
/** An observable of the matrix parameters scoped to this route */
public params: Observable<Params>,
/** An observable of the query parameters shared by all the routes */
public queryParams: Observable<Params>,
/** An observable of the URL fragment shared by all the routes */
public fragment: Observable<string>,
/** An observable of the static and resolved data of this route. */
public data: Observable<Data>,
/** The outlet name of the route. It's a constant */
public outlet: string,
/** The component of the route. It's a constant */
// TODO(vsavkin): remove |string
public component: Type<any>|string|null, futureSnapshot: ActivatedRouteSnapshot) {
this._futureSnapshot = futureSnapshot;
}
/** The configuration used to match this route */
get routeConfig(): Route|null { return this._futureSnapshot.routeConfig; }
/** The root of the router state */
get root(): ActivatedRoute { return this._routerState.root; }
/** The parent of this route in the router state tree */
get parent(): ActivatedRoute|null { return this._routerState.parent(this); }
/** The first child of this route in the router state tree */
get firstChild(): ActivatedRoute|null { return this._routerState.firstChild(this); }
/** The children of this route in the router state tree */
get children(): ActivatedRoute[] { return this._routerState.children(this); }
/** The path from the root of the router state tree to this route */
get pathFromRoot(): ActivatedRoute[] { return this._routerState.pathFromRoot(this); }
get paramMap(): Observable<ParamMap> {
if (!this._paramMap) {
this._paramMap = map.call(this.params, (p: Params): ParamMap => convertToParamMap(p));
}
return this._paramMap;
}
get queryParamMap(): Observable<ParamMap> {
if (!this._queryParamMap) {
this._queryParamMap =
map.call(this.queryParams, (p: Params): ParamMap => convertToParamMap(p));
}
return this._queryParamMap;
}
toString(): string {
return this.snapshot ? this.snapshot.toString() : `Future(${this._futureSnapshot})`;
}
}
export type ParamsInheritanceStrategy = 'emptyOnly' | 'always';
/** @internal */
export type Inherited = {
params: Params,
data: Data,
resolve: Data,
};
/**
* Returns the inherited params, data, and resolve for a given route.
* By default, this only inherits values up to the nearest path-less or component-less route.
* @internal
*/
export function inheritedParamsDataResolve(
route: ActivatedRouteSnapshot,
paramsInheritanceStrategy: ParamsInheritanceStrategy = 'emptyOnly'): Inherited {
const pathFromRoot = route.pathFromRoot;
let inheritingStartingFrom = 0;
if (paramsInheritanceStrategy !== 'always') {
inheritingStartingFrom = pathFromRoot.length - 1;
while (inheritingStartingFrom >= 1) {
const current = pathFromRoot[inheritingStartingFrom];
const parent = pathFromRoot[inheritingStartingFrom - 1];
// current route is an empty path => inherits its parent's params and data
if (current.routeConfig && current.routeConfig.path === '') {
inheritingStartingFrom--;
// parent is componentless => current route should inherit its params and data
} else if (!parent.component) {
inheritingStartingFrom--;
} else {
break;
}
}
}
return flattenInherited(pathFromRoot.slice(inheritingStartingFrom));
}
/** @internal */
function flattenInherited(pathFromRoot: ActivatedRouteSnapshot[]): Inherited {
return pathFromRoot.reduce((res, curr) => {
const params = {...res.params, ...curr.params};
const data = {...res.data, ...curr.data};
const resolve = {...res.resolve, ...curr._resolvedData};
return {params, data, resolve};
}, <any>{params: {}, data: {}, resolve: {}});
}
/**
* @whatItDoes Contains the information about a route associated with a component loaded in an
* outlet
* at a particular moment in time. ActivatedRouteSnapshot can also be used to traverse the router
* state tree.
*
* @howToUse
*
* ```
* @Component({templateUrl:'./my-component.html'})
* class MyComponent {
* constructor(route: ActivatedRoute) {
* const id: string = route.snapshot.params.id;
* const url: string = route.snapshot.url.join('');
* const user = route.snapshot.data.user;
* }
* }
* ```
*
* @stable
*/
export class ActivatedRouteSnapshot {
/** The configuration used to match this route **/
public readonly routeConfig: Route|null;
/** @internal **/
_urlSegment: UrlSegmentGroup;
/** @internal */
_lastPathIndex: number;
/** @internal */
_resolve: ResolveData;
/** @internal */
_resolvedData: Data;
/** @internal */
_routerState: RouterStateSnapshot;
/** @internal */
_paramMap: ParamMap;
/** @internal */
_queryParamMap: ParamMap;
/** @internal */
constructor(
/** The URL segments matched by this route */
public url: UrlSegment[],
/** The matrix parameters scoped to this route */
public params: Params,
/** The query parameters shared by all the routes */
public queryParams: Params,
/** The URL fragment shared by all the routes */
public fragment: string,
/** The static and resolved data of this route */
public data: Data,
/** The outlet name of the route */
public outlet: string,
/** The component of the route */
public component: Type<any>|string|null, routeConfig: Route|null, urlSegment: UrlSegmentGroup,
lastPathIndex: number, resolve: ResolveData) {
this.routeConfig = routeConfig;
this._urlSegment = urlSegment;
this._lastPathIndex = lastPathIndex;
this._resolve = resolve;
}
/** The root of the router state */
get root(): ActivatedRouteSnapshot { return this._routerState.root; }
/** The parent of this route in the router state tree */
get parent(): ActivatedRouteSnapshot|null { return this._routerState.parent(this); }
/** The first child of this route in the router state tree */
get firstChild(): ActivatedRouteSnapshot|null { return this._routerState.firstChild(this); }
/** The children of this route in the router state tree */
get children(): ActivatedRouteSnapshot[] { return this._routerState.children(this); }
/** The path from the root of the router state tree to this route */
get pathFromRoot(): ActivatedRouteSnapshot[] { return this._routerState.pathFromRoot(this); }
get paramMap(): ParamMap {
if (!this._paramMap) {
this._paramMap = convertToParamMap(this.params);
}
return this._paramMap;
}
get queryParamMap(): ParamMap {
if (!this._queryParamMap) {
this._queryParamMap = convertToParamMap(this.queryParams);
}
return this._queryParamMap;
}
toString(): string {
const url = this.url.map(segment => segment.toString()).join('/');
const matched = this.routeConfig ? this.routeConfig.path : '';
return `Route(url:'${url}', path:'${matched}')`;
}
}
/**
* @whatItDoes Represents the state of the router at a moment in time.
*
* @howToUse
*
* ```
* @Component({templateUrl:'template.html'})
* class MyComponent {
* constructor(router: Router) {
* const state: RouterState = router.routerState;
* const snapshot: RouterStateSnapshot = state.snapshot;
* const root: ActivatedRouteSnapshot = snapshot.root;
* const child = root.firstChild;
* const id: Observable<string> = child.params.map(p => p.id);
* //...
* }
* }
* ```
*
* @description
* RouterStateSnapshot is a tree of activated route snapshots. Every node in this tree knows about
* the "consumed" URL segments, the extracted parameters, and the resolved data.
*
* @stable
*/
export class RouterStateSnapshot extends Tree<ActivatedRouteSnapshot> {
/** @internal */
constructor(
/** The url from which this snapshot was created */
public url: string, root: TreeNode<ActivatedRouteSnapshot>) {
super(root);
setRouterState(<RouterStateSnapshot>this, root);
}
toString(): string { return serializeNode(this._root); }
}
function setRouterState<U, T extends{_routerState: U}>(state: U, node: TreeNode<T>): void {
node.value._routerState = state;
node.children.forEach(c => setRouterState(state, c));
}
function serializeNode(node: TreeNode<ActivatedRouteSnapshot>): string {
const c = node.children.length > 0 ? ` { ${node.children.map(serializeNode).join(', ')} } ` : '';
return `${node.value}${c}`;
}
/**
* The expectation is that the activate route is created with the right set of parameters.
* So we push new values into the observables only when they are not the initial values.
* And we detect that by checking if the snapshot field is set.
*/
export function advanceActivatedRoute(route: ActivatedRoute): void {
if (route.snapshot) {
const currentSnapshot = route.snapshot;
const nextSnapshot = route._futureSnapshot;
route.snapshot = nextSnapshot;
if (!shallowEqual(currentSnapshot.queryParams, nextSnapshot.queryParams)) {
(<any>route.queryParams).next(nextSnapshot.queryParams);
}
if (currentSnapshot.fragment !== nextSnapshot.fragment) {
(<any>route.fragment).next(nextSnapshot.fragment);
}
if (!shallowEqual(currentSnapshot.params, nextSnapshot.params)) {
(<any>route.params).next(nextSnapshot.params);
}
if (!shallowEqualArrays(currentSnapshot.url, nextSnapshot.url)) {
(<any>route.url).next(nextSnapshot.url);
}
if (!shallowEqual(currentSnapshot.data, nextSnapshot.data)) {
(<any>route.data).next(nextSnapshot.data);
}
} else {
route.snapshot = route._futureSnapshot;
// this is for resolved data
(<any>route.data).next(route._futureSnapshot.data);
}
}
export function equalParamsAndUrlSegments(
a: ActivatedRouteSnapshot, b: ActivatedRouteSnapshot): boolean {
const equalUrlParams = shallowEqual(a.params, b.params) && equalSegments(a.url, b.url);
const parentsMismatch = !a.parent !== !b.parent;
return equalUrlParams && !parentsMismatch &&
(!a.parent || equalParamsAndUrlSegments(a.parent, b.parent !));
}