source: trip-planner-front/node_modules/@angular/router/esm2015/src/router_scroller.js@ 6a3a178

/**
 * @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 { ViewportScroller } from '@angular/common';
import { Injectable } from '@angular/core';
import { NavigationEnd, NavigationStart, Scroll } from './events';
import { Router } from './router';
export class RouterScroller {
    constructor(router, 
    /** @docsNotRequired */ viewportScroller, options = {}) {
        this.router = router;
        this.viewportScroller = viewportScroller;
        this.options = options;
        this.lastId = 0;
        this.lastSource = 'imperative';
        this.restoredId = 0;
        this.store = {};
        // Default both options to 'disabled'
        options.scrollPositionRestoration = options.scrollPositionRestoration || 'disabled';
        options.anchorScrolling = options.anchorScrolling || 'disabled';
    }
    init() {
        // we want to disable the automatic scrolling because having two places
        // responsible for scrolling results race conditions, especially given
        // that browser don't implement this behavior consistently
        if (this.options.scrollPositionRestoration !== 'disabled') {
            this.viewportScroller.setHistoryScrollRestoration('manual');
        }
        this.routerEventsSubscription = this.createScrollEvents();
        this.scrollEventsSubscription = this.consumeScrollEvents();
    }
    createScrollEvents() {
        return this.router.events.subscribe(e => {
            if (e instanceof NavigationStart) {
                // store the scroll position of the current stable navigations.
                this.store[this.lastId] = this.viewportScroller.getScrollPosition();
                this.lastSource = e.navigationTrigger;
                this.restoredId = e.restoredState ? e.restoredState.navigationId : 0;
            }
            else if (e instanceof NavigationEnd) {
                this.lastId = e.id;
                this.scheduleScrollEvent(e, this.router.parseUrl(e.urlAfterRedirects).fragment);
            }
        });
    }
    consumeScrollEvents() {
        return this.router.events.subscribe(e => {
            if (!(e instanceof Scroll))
                return;
            // a popstate event. The pop state event will always ignore anchor scrolling.
            if (e.position) {
                if (this.options.scrollPositionRestoration === 'top') {
                    this.viewportScroller.scrollToPosition([0, 0]);
                }
                else if (this.options.scrollPositionRestoration === 'enabled') {
                    this.viewportScroller.scrollToPosition(e.position);
                }
                // imperative navigation "forward"
            }
            else {
                if (e.anchor && this.options.anchorScrolling === 'enabled') {
                    this.viewportScroller.scrollToAnchor(e.anchor);
                }
                else if (this.options.scrollPositionRestoration !== 'disabled') {
                    this.viewportScroller.scrollToPosition([0, 0]);
                }
            }
        });
    }
    scheduleScrollEvent(routerEvent, anchor) {
        this.router.triggerEvent(new Scroll(routerEvent, this.lastSource === 'popstate' ? this.store[this.restoredId] : null, anchor));
    }
    /** @nodoc */
    ngOnDestroy() {
        if (this.routerEventsSubscription) {
            this.routerEventsSubscription.unsubscribe();
        }
        if (this.scrollEventsSubscription) {
            this.scrollEventsSubscription.unsubscribe();
        }
    }
}
RouterScroller.decorators = [
    { type: Injectable }
];
RouterScroller.ctorParameters = () => [
    { type: Router },
    { type: ViewportScroller },
    { type: undefined }
];
//# sourceMappingURL=data:application/json;base64,{"version":3,"file":"router_scroller.js","sourceRoot":"","sources":["../../../../../../packages/router/src/router_scroller.ts"],"names":[],"mappings":"AAAA;;;;;;GAMG;AAEH,OAAO,EAAC,gBAAgB,EAAC,MAAM,iBAAiB,CAAC;AACjD,OAAO,EAAC,UAAU,EAAY,MAAM,eAAe,CAAC;AAGpD,OAAO,EAAC,aAAa,EAAE,eAAe,EAAE,MAAM,EAAC,MAAM,UAAU,CAAC;AAChE,OAAO,EAAC,MAAM,EAAC,MAAM,UAAU,CAAC;AAGhC,MAAM,OAAO,cAAc;IAWzB,YACY,MAAc;IACtB,uBAAuB,CAAiB,gBAAkC,EAAU,UAGhF,EAAE;QAJE,WAAM,GAAN,MAAM,CAAQ;QACkB,qBAAgB,GAAhB,gBAAgB,CAAkB;QAAU,YAAO,GAAP,OAAO,CAGrF;QAVF,WAAM,GAAG,CAAC,CAAC;QACX,eAAU,GAAmD,YAAY,CAAC;QAC1E,eAAU,GAAG,CAAC,CAAC;QACf,UAAK,GAAsC,EAAE,CAAC;QAQpD,qCAAqC;QACrC,OAAO,CAAC,yBAAyB,GAAG,OAAO,CAAC,yBAAyB,IAAI,UAAU,CAAC;QACpF,OAAO,CAAC,eAAe,GAAG,OAAO,CAAC,eAAe,IAAI,UAAU,CAAC;IAClE,CAAC;IAED,IAAI;QACF,uEAAuE;QACvE,sEAAsE;QACtE,0DAA0D;QAC1D,IAAI,IAAI,CAAC,OAAO,CAAC,yBAAyB,KAAK,UAAU,EAAE;YACzD,IAAI,CAAC,gBAAgB,CAAC,2BAA2B,CAAC,QAAQ,CAAC,CAAC;SAC7D;QACD,IAAI,CAAC,wBAAwB,GAAG,IAAI,CAAC,kBAAkB,EAAE,CAAC;QAC1D,IAAI,CAAC,wBAAwB,GAAG,IAAI,CAAC,mBAAmB,EAAE,CAAC;IAC7D,CAAC;IAEO,kBAAkB;QACxB,OAAO,IAAI,CAAC,MAAM,CAAC,MAAM,CAAC,SAAS,CAAC,CAAC,CAAC,EAAE;YACtC,IAAI,CAAC,YAAY,eAAe,EAAE;gBAChC,+DAA+D;gBAC/D,IAAI,CAAC,KAAK,CAAC,IAAI,CAAC,MAAM,CAAC,GAAG,IAAI,CAAC,gBAAgB,CAAC,iBAAiB,EAAE,CAAC;gBACpE,IAAI,CAAC,UAAU,GAAG,CAAC,CAAC,iBAAiB,CAAC;gBACtC,IAAI,CAAC,UAAU,GAAG,CAAC,CAAC,aAAa,CAAC,CAAC,CAAC,CAAC,CAAC,aAAa,CAAC,YAAY,CAAC,CAAC,CAAC,CAAC,CAAC;aACtE;iBAAM,IAAI,CAAC,YAAY,aAAa,EAAE;gBACrC,IAAI,CAAC,MAAM,GAAG,CAAC,CAAC,EAAE,CAAC;gBACnB,IAAI,CAAC,mBAAmB,CAAC,CAAC,EAAE,IAAI,CAAC,MAAM,CAAC,QAAQ,CAAC,CAAC,CAAC,iBAAiB,CAAC,CAAC,QAAQ,CAAC,CAAC;aACjF;QACH,CAAC,CAAC,CAAC;IACL,CAAC;IAEO,mBAAmB;QACzB,OAAO,IAAI,CAAC,MAAM,CAAC,MAAM,CAAC,SAAS,CAAC,CAAC,CAAC,EAAE;YACtC,IAAI,CAAC,CAAC,CAAC,YAAY,MAAM,CAAC;gBAAE,OAAO;YACnC,6EAA6E;YAC7E,IAAI,CAAC,CAAC,QAAQ,EAAE;gBACd,IAAI,IAAI,CAAC,OAAO,CAAC,yBAAyB,KAAK,KAAK,EAAE;oBACpD,IAAI,CAAC,gBAAgB,CAAC,gBAAgB,CAAC,CAAC,CAAC,EAAE,CAAC,CAAC,CAAC,CAAC;iBAChD;qBAAM,IAAI,IAAI,CAAC,OAAO,CAAC,yBAAyB,KAAK,SAAS,EAAE;oBAC/D,IAAI,CAAC,gBAAgB,CAAC,gBAAgB,CAAC,CAAC,CAAC,QAAQ,CAAC,CAAC;iBACpD;gBACD,kCAAkC;aACnC;iBAAM;gBACL,IAAI,CAAC,CAAC,MAAM,IAAI,IAAI,CAAC,OAAO,CAAC,eAAe,KAAK,SAAS,EAAE;oBAC1D,IAAI,CAAC,gBAAgB,CAAC,cAAc,CAAC,CAAC,CAAC,MAAM,CAAC,CAAC;iBAChD;qBAAM,IAAI,IAAI,CAAC,OAAO,CAAC,yBAAyB,KAAK,UAAU,EAAE;oBAChE,IAAI,CAAC,gBAAgB,CAAC,gBAAgB,CAAC,CAAC,CAAC,EAAE,CAAC,CAAC,CAAC,CAAC;iBAChD;aACF;QACH,CAAC,CAAC,CAAC;IACL,CAAC;IAEO,mBAAmB,CAAC,WAA0B,EAAE,MAAmB;QACzE,IAAI,CAAC,MAAM,CAAC,YAAY,CAAC,IAAI,MAAM,CAC/B,WAAW,EAAE,IAAI,CAAC,UAAU,KAAK,UAAU,CAAC,CAAC,CAAC,IAAI,CAAC,KAAK,CAAC,IAAI,CAAC,UAAU,CAAC,CAAC,CAAC,CAAC,IAAI,EAAE,MAAM,CAAC,CAAC,CAAC;IACjG,CAAC;IAED,aAAa;IACb,WAAW;QACT,IAAI,IAAI,CAAC,wBAAwB,EAAE;YACjC,IAAI,CAAC,wBAAwB,CAAC,WAAW,EAAE,CAAC;SAC7C;QACD,IAAI,IAAI,CAAC,wBAAwB,EAAE;YACjC,IAAI,CAAC,wBAAwB,CAAC,WAAW,EAAE,CAAC;SAC7C;IACH,CAAC;;;YAlFF,UAAU;;;YAFH,MAAM;YALN,gBAAgB","sourcesContent":["/**\n * @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 {ViewportScroller} from '@angular/common';\nimport {Injectable, OnDestroy} from '@angular/core';\nimport {Unsubscribable} from 'rxjs';\n\nimport {NavigationEnd, NavigationStart, Scroll} from './events';\nimport {Router} from './router';\n\n@Injectable()\nexport class RouterScroller implements OnDestroy {\n  // TODO(issue/24571): remove '!'.\n  private routerEventsSubscription!: Unsubscribable;\n  // TODO(issue/24571): remove '!'.\n  private scrollEventsSubscription!: Unsubscribable;\n\n  private lastId = 0;\n  private lastSource: 'imperative'|'popstate'|'hashchange'|undefined = 'imperative';\n  private restoredId = 0;\n  private store: {[key: string]: [number, number]} = {};\n\n  constructor(\n      private router: Router,\n      /** @docsNotRequired */ public readonly viewportScroller: ViewportScroller, private options: {\n        scrollPositionRestoration?: 'disabled'|'enabled'|'top',\n        anchorScrolling?: 'disabled'|'enabled'\n      } = {}) {\n    // Default both options to 'disabled'\n    options.scrollPositionRestoration = options.scrollPositionRestoration || 'disabled';\n    options.anchorScrolling = options.anchorScrolling || 'disabled';\n  }\n\n  init(): void {\n    // we want to disable the automatic scrolling because having two places\n    // responsible for scrolling results race conditions, especially given\n    // that browser don't implement this behavior consistently\n    if (this.options.scrollPositionRestoration !== 'disabled') {\n      this.viewportScroller.setHistoryScrollRestoration('manual');\n    }\n    this.routerEventsSubscription = this.createScrollEvents();\n    this.scrollEventsSubscription = this.consumeScrollEvents();\n  }\n\n  private createScrollEvents() {\n    return this.router.events.subscribe(e => {\n      if (e instanceof NavigationStart) {\n        // store the scroll position of the current stable navigations.\n        this.store[this.lastId] = this.viewportScroller.getScrollPosition();\n        this.lastSource = e.navigationTrigger;\n        this.restoredId = e.restoredState ? e.restoredState.navigationId : 0;\n      } else if (e instanceof NavigationEnd) {\n        this.lastId = e.id;\n        this.scheduleScrollEvent(e, this.router.parseUrl(e.urlAfterRedirects).fragment);\n      }\n    });\n  }\n\n  private consumeScrollEvents() {\n    return this.router.events.subscribe(e => {\n      if (!(e instanceof Scroll)) return;\n      // a popstate event. The pop state event will always ignore anchor scrolling.\n      if (e.position) {\n        if (this.options.scrollPositionRestoration === 'top') {\n          this.viewportScroller.scrollToPosition([0, 0]);\n        } else if (this.options.scrollPositionRestoration === 'enabled') {\n          this.viewportScroller.scrollToPosition(e.position);\n        }\n        // imperative navigation \"forward\"\n      } else {\n        if (e.anchor && this.options.anchorScrolling === 'enabled') {\n          this.viewportScroller.scrollToAnchor(e.anchor);\n        } else if (this.options.scrollPositionRestoration !== 'disabled') {\n          this.viewportScroller.scrollToPosition([0, 0]);\n        }\n      }\n    });\n  }\n\n  private scheduleScrollEvent(routerEvent: NavigationEnd, anchor: string|null): void {\n    this.router.triggerEvent(new Scroll(\n        routerEvent, this.lastSource === 'popstate' ? this.store[this.restoredId] : null, anchor));\n  }\n\n  /** @nodoc */\n  ngOnDestroy() {\n    if (this.routerEventsSubscription) {\n      this.routerEventsSubscription.unsubscribe();\n    }\n    if (this.scrollEventsSubscription) {\n      this.scrollEventsSubscription.unsubscribe();\n    }\n  }\n}\n"]}