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uiSref.ts
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uiSref.ts
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/** @ng2api @module directives */
/** */
import { UIRouter, extend, Obj, TransitionOptions, TargetState, isNumber } from '@uirouter/core';
import {
Directive,
Inject,
Input,
Optional,
ElementRef,
Renderer2,
OnChanges,
SimpleChanges,
HostListener,
} from '@angular/core';
import { UIView, ParentUIViewInject } from './uiView';
import { ReplaySubject } from 'rxjs/ReplaySubject';
import { Subscription } from 'rxjs/Subscription';
/**
* @internalapi
* # blah blah blah
*/
@Directive({ selector: 'a[uiSref]' })
export class AnchorUISref {
constructor(public _el: ElementRef, public _renderer: Renderer2) {}
openInNewTab() {
return this._el.nativeElement.target === '_blank';
}
update(href: string) {
if (href && href !== '') {
this._renderer.setProperty(this._el.nativeElement, 'href', href);
} else {
this._renderer.removeAttribute(this._el.nativeElement, 'href');
}
}
}
/**
* A directive when clicked, initiates a [[Transition]] to a [[TargetState]].
*
* ### Purpose
*
* This directive is applied to anchor tags (`<a>`) or any other clickable element. It is a state reference (or sref --
* similar to an href). When clicked, the directive will transition to that state by calling [[StateService.go]],
* and optionally supply state parameter values and transition options.
*
* When this directive is on an anchor tag, it will also add an `href` attribute to the anchor.
*
* ### Selector
*
* - `[uiSref]`: The directive is created as an attribute on an element, e.g., `<a uiSref></a>`
*
* ### Inputs
*
* - `uiSref`: the target state's name, e.g., `uiSref="foostate"`. If a component template uses a relative `uiSref`,
* e.g., `uiSref=".child"`, the reference is relative to that component's state.
*
* - `uiParams`: any target state parameter values, as an object, e.g., `[uiParams]="{ fooId: bar.fooId }"`
*
* - `uiOptions`: [[TransitionOptions]], e.g., `[uiOptions]="{ inherit: false }"`
*
* @example
* ```html
*
* <!-- Targets bar state' -->
* <a uiSref="bar">Bar</a>
*
* <!-- Assume this component's state is "foo".
* Relatively targets "foo.child" -->
* <a uiSref=".child">Foo Child</a>
*
* <!-- Targets "bar" state and supplies parameter value -->
* <a uiSref="bar" [uiParams]="{ barId: foo.barId }">Bar {{foo.barId}}</a>
*
* <!-- Targets "bar" state and parameter, doesn't inherit existing parameters-->
* <a uiSref="bar" [uiParams]="{ barId: foo.barId }" [uiOptions]="{ inherit: false }">Bar {{foo.barId}}</a>
* ```
*/
@Directive({
selector: '[uiSref]',
exportAs: 'uiSref',
})
export class UISref implements OnChanges {
/**
* `@Input('uiSref')` The name of the state to link to
*
* ```html
* <a uiSref="hoome">Home</a>
* ```
*/
@Input('uiSref') state: string;
/**
* `@Input('uiParams')` The parameter values to use (as key/values)
*
* ```html
* <a uiSref="book" [uiParams]="{ bookId: book.id }">Book {{ book.name }}</a>
* ```
*/
@Input('uiParams') params: any;
/**
* `@Input('uiOptions')` The transition options
*
* ```html
* <a uiSref="books" [uiOptions]="{ reload: true }">Book {{ book.name }}</a>
* ```
*/
@Input('uiOptions') options: TransitionOptions;
/**
* An observable (ReplaySubject) of the state this UISref is targeting.
* When the UISref is clicked, it will transition to this [[TargetState]].
*/
public targetState$ = new ReplaySubject<TargetState>(1);
/** @internalapi */ private _emit = false;
/** @internalapi */ private _statesSub: Subscription;
/** @internalapi */ private _router: UIRouter;
/** @internalapi */ private _anchorUISref: AnchorUISref;
/** @internalapi */ private _parent: ParentUIViewInject;
constructor(
_router: UIRouter,
@Optional() _anchorUISref: AnchorUISref,
@Inject(UIView.PARENT_INJECT) parent: ParentUIViewInject,
) {
this._router = _router;
this._anchorUISref = _anchorUISref;
this._parent = parent;
this._statesSub = _router.globals.states$.subscribe(() => this.update());
}
/** @internalapi */
set uiSref(val: string) {
this.state = val;
this.update();
}
/** @internalapi */
set uiParams(val: Obj) {
this.params = val;
this.update();
}
/** @internalapi */
set uiOptions(val: TransitionOptions) {
this.options = val;
this.update();
}
ngOnInit() {
this._emit = true;
this.update();
}
ngOnChanges(changes: SimpleChanges): void {
this.update();
}
ngOnDestroy() {
this._emit = false;
this._statesSub.unsubscribe();
this.targetState$.unsubscribe();
}
private update() {
const $state = this._router.stateService;
if (this._emit) {
const newTarget = $state.target(this.state, this.params, this.getOptions());
this.targetState$.next(newTarget);
}
if (this._anchorUISref) {
const href = $state.href(this.state, this.params, this.getOptions());
this._anchorUISref.update(href);
}
}
getOptions() {
const defaultOpts: TransitionOptions = {
relative: this._parent && this._parent.context && this._parent.context.name,
inherit: true,
source: 'sref',
};
return extend(defaultOpts, this.options || {});
}
/** When triggered by a (click) event, this function transitions to the UISref's target state */
@HostListener('click', ['$event.button', '$event.ctrlKey', '$event.metaKey'])
go(button: number, ctrlKey: boolean, metaKey: boolean) {
if (
(this._anchorUISref &&
(this._anchorUISref.openInNewTab() || button || !isNumber(button) || ctrlKey || metaKey)) ||
!this.state
) {
return;
}
this._router.stateService.go(this.state, this.params, this.getOptions());
return false;
}
}