@ng-bootstrap/ng-bootstrap
Version:
Angular powered Bootstrap
150 lines • 19.8 kB
JavaScript
import { Component, ElementRef, EventEmitter, inject, Input, NgZone, Output, ViewEncapsulation, } from '@angular/core';
import { fromEvent, Subject } from 'rxjs';
import { filter, take, takeUntil } from 'rxjs/operators';
import { getFocusableBoundaryElements } from '../util/focus-trap';
import { Key } from '../util/key';
import { OffcanvasDismissReasons } from './offcanvas-dismiss-reasons';
import { ngbRunTransition } from '../util/transition/ngbTransition';
import { reflow } from '../util/util';
import { DOCUMENT } from '@angular/common';
import * as i0 from "@angular/core";
export class NgbOffcanvasPanel {
constructor() {
this._document = inject(DOCUMENT);
this._elRef = inject((ElementRef));
this._zone = inject(NgZone);
this._closed$ = new Subject();
this._elWithFocus = null; // element that is focused prior to offcanvas opening
this.keyboard = true;
this.position = 'start';
this.dismissEvent = new EventEmitter();
this.shown = new Subject();
this.hidden = new Subject();
}
dismiss(reason) {
this.dismissEvent.emit(reason);
}
ngOnInit() {
this._elWithFocus = this._document.activeElement;
this._zone.onStable
.asObservable()
.pipe(take(1))
.subscribe(() => {
this._show();
});
}
ngOnDestroy() {
this._disableEventHandling();
}
hide() {
const context = { animation: this.animation, runningTransition: 'stop' };
const offcanvasTransition$ = ngbRunTransition(this._zone, this._elRef.nativeElement, (element) => {
element.classList.remove('showing');
element.classList.add('hiding');
return () => element.classList.remove('show', 'hiding');
}, context);
offcanvasTransition$.subscribe(() => {
this.hidden.next();
this.hidden.complete();
});
this._disableEventHandling();
this._restoreFocus();
return offcanvasTransition$;
}
_show() {
const context = { animation: this.animation, runningTransition: 'continue' };
const offcanvasTransition$ = ngbRunTransition(this._zone, this._elRef.nativeElement, (element, animation) => {
if (animation) {
reflow(element);
}
element.classList.add('show', 'showing');
return () => element.classList.remove('showing');
}, context);
offcanvasTransition$.subscribe(() => {
this.shown.next();
this.shown.complete();
});
this._enableEventHandling();
this._setFocus();
}
_enableEventHandling() {
const { nativeElement } = this._elRef;
this._zone.runOutsideAngular(() => {
fromEvent(nativeElement, 'keydown')
.pipe(takeUntil(this._closed$),
/* eslint-disable-next-line deprecation/deprecation */
filter((e) => e.which === Key.Escape))
.subscribe((event) => {
if (this.keyboard) {
requestAnimationFrame(() => {
if (!event.defaultPrevented) {
this._zone.run(() => this.dismiss(OffcanvasDismissReasons.ESC));
}
});
}
});
});
}
_disableEventHandling() {
this._closed$.next();
}
_setFocus() {
const { nativeElement } = this._elRef;
if (!nativeElement.contains(document.activeElement)) {
const autoFocusable = nativeElement.querySelector(`[ngbAutofocus]`);
const firstFocusable = getFocusableBoundaryElements(nativeElement)[0];
const elementToFocus = autoFocusable || firstFocusable || nativeElement;
elementToFocus.focus();
}
}
_restoreFocus() {
const body = this._document.body;
const elWithFocus = this._elWithFocus;
let elementToFocus;
if (elWithFocus && elWithFocus['focus'] && body.contains(elWithFocus)) {
elementToFocus = elWithFocus;
}
else {
elementToFocus = body;
}
this._zone.runOutsideAngular(() => {
setTimeout(() => elementToFocus.focus());
this._elWithFocus = null;
});
}
static { this.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "17.0.0", ngImport: i0, type: NgbOffcanvasPanel, deps: [], target: i0.ɵɵFactoryTarget.Component }); }
static { this.ɵcmp = i0.ɵɵngDeclareComponent({ minVersion: "14.0.0", version: "17.0.0", type: NgbOffcanvasPanel, isStandalone: true, selector: "ngb-offcanvas-panel", inputs: { animation: "animation", ariaLabelledBy: "ariaLabelledBy", ariaDescribedBy: "ariaDescribedBy", keyboard: "keyboard", panelClass: "panelClass", position: "position" }, outputs: { dismissEvent: "dismiss" }, host: { attributes: { "role": "dialog", "tabindex": "-1" }, properties: { "class": "\"offcanvas offcanvas-\" + position + (panelClass ? \" \" + panelClass : \"\")", "attr.aria-modal": "true", "attr.aria-labelledby": "ariaLabelledBy", "attr.aria-describedby": "ariaDescribedBy" } }, ngImport: i0, template: '<ng-content />', isInline: true, encapsulation: i0.ViewEncapsulation.None }); }
}
i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "17.0.0", ngImport: i0, type: NgbOffcanvasPanel, decorators: [{
type: Component,
args: [{
selector: 'ngb-offcanvas-panel',
standalone: true,
template: '<ng-content />',
encapsulation: ViewEncapsulation.None,
host: {
'[class]': '"offcanvas offcanvas-" + position + (panelClass ? " " + panelClass : "")',
role: 'dialog',
tabindex: '-1',
'[attr.aria-modal]': 'true',
'[attr.aria-labelledby]': 'ariaLabelledBy',
'[attr.aria-describedby]': 'ariaDescribedBy',
},
}]
}], propDecorators: { animation: [{
type: Input
}], ariaLabelledBy: [{
type: Input
}], ariaDescribedBy: [{
type: Input
}], keyboard: [{
type: Input
}], panelClass: [{
type: Input
}], position: [{
type: Input
}], dismissEvent: [{
type: Output,
args: ['dismiss']
}] } });
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{\n\tComponent,\n\tElementRef,\n\tEventEmitter,\n\tinject,\n\tInput,\n\tNgZone,\n\tOnDestroy,\n\tOnInit,\n\tOutput,\n\tViewEncapsulation,\n} from '@angular/core';\n\nimport { fromEvent, Observable, Subject } from 'rxjs';\nimport { filter, take, takeUntil } from 'rxjs/operators';\n\nimport { getFocusableBoundaryElements } from '../util/focus-trap';\nimport { Key } from '../util/key';\nimport { OffcanvasDismissReasons } from './offcanvas-dismiss-reasons';\nimport { ngbRunTransition, NgbTransitionOptions } from '../util/transition/ngbTransition';\nimport { reflow } from '../util/util';\nimport { DOCUMENT } from '@angular/common';\n\n@Component({\n\tselector: 'ngb-offcanvas-panel',\n\tstandalone: true,\n\ttemplate: '<ng-content />',\n\tencapsulation: ViewEncapsulation.None,\n\thost: {\n\t\t'[class]': '\"offcanvas offcanvas-\" + position  + (panelClass ? \" \" + panelClass : \"\")',\n\t\trole: 'dialog',\n\t\ttabindex: '-1',\n\t\t'[attr.aria-modal]': 'true',\n\t\t'[attr.aria-labelledby]': 'ariaLabelledBy',\n\t\t'[attr.aria-describedby]': 'ariaDescribedBy',\n\t},\n})\nexport class NgbOffcanvasPanel implements OnInit, OnDestroy {\n\tprivate _document = inject(DOCUMENT);\n\tprivate _elRef = inject(ElementRef<HTMLElement>);\n\tprivate _zone = inject(NgZone);\n\n\tprivate _closed$ = new Subject<void>();\n\tprivate _elWithFocus: Element | null = null; // element that is focused prior to offcanvas opening\n\n\t@Input() animation: boolean;\n\t@Input() ariaLabelledBy?: string;\n\t@Input() ariaDescribedBy?: string;\n\t@Input() keyboard = true;\n\t@Input() panelClass: string;\n\t@Input() position: 'start' | 'end' | 'top' | 'bottom' = 'start';\n\n\t@Output('dismiss') dismissEvent = new EventEmitter();\n\n\tshown = new Subject<void>();\n\thidden = new Subject<void>();\n\n\tdismiss(reason): void {\n\t\tthis.dismissEvent.emit(reason);\n\t}\n\n\tngOnInit() {\n\t\tthis._elWithFocus = this._document.activeElement;\n\t\tthis._zone.onStable\n\t\t\t.asObservable()\n\t\t\t.pipe(take(1))\n\t\t\t.subscribe(() => {\n\t\t\t\tthis._show();\n\t\t\t});\n\t}\n\n\tngOnDestroy() {\n\t\tthis._disableEventHandling();\n\t}\n\n\thide(): Observable<any> {\n\t\tconst context: NgbTransitionOptions<any> = { animation: this.animation, runningTransition: 'stop' };\n\n\t\tconst offcanvasTransition$ = ngbRunTransition(\n\t\t\tthis._zone,\n\t\t\tthis._elRef.nativeElement,\n\t\t\t(element) => {\n\t\t\t\telement.classList.remove('showing');\n\t\t\t\telement.classList.add('hiding');\n\t\t\t\treturn () => element.classList.remove('show', 'hiding');\n\t\t\t},\n\t\t\tcontext,\n\t\t);\n\n\t\toffcanvasTransition$.subscribe(() => {\n\t\t\tthis.hidden.next();\n\t\t\tthis.hidden.complete();\n\t\t});\n\n\t\tthis._disableEventHandling();\n\t\tthis._restoreFocus();\n\n\t\treturn offcanvasTransition$;\n\t}\n\n\tprivate _show() {\n\t\tconst context: NgbTransitionOptions<any> = { animation: this.animation, runningTransition: 'continue' };\n\n\t\tconst offcanvasTransition$ = ngbRunTransition(\n\t\t\tthis._zone,\n\t\t\tthis._elRef.nativeElement,\n\t\t\t(element: HTMLElement, animation: boolean) => {\n\t\t\t\tif (animation) {\n\t\t\t\t\treflow(element);\n\t\t\t\t}\n\t\t\t\telement.classList.add('show', 'showing');\n\t\t\t\treturn () => element.classList.remove('showing');\n\t\t\t},\n\t\t\tcontext,\n\t\t);\n\n\t\toffcanvasTransition$.subscribe(() => {\n\t\t\tthis.shown.next();\n\t\t\tthis.shown.complete();\n\t\t});\n\n\t\tthis._enableEventHandling();\n\t\tthis._setFocus();\n\t}\n\n\tprivate _enableEventHandling() {\n\t\tconst { nativeElement } = this._elRef;\n\t\tthis._zone.runOutsideAngular(() => {\n\t\t\tfromEvent<KeyboardEvent>(nativeElement, 'keydown')\n\t\t\t\t.pipe(\n\t\t\t\t\ttakeUntil(this._closed$),\n\t\t\t\t\t/* eslint-disable-next-line deprecation/deprecation */\n\t\t\t\t\tfilter((e) => e.which === Key.Escape),\n\t\t\t\t)\n\t\t\t\t.subscribe((event) => {\n\t\t\t\t\tif (this.keyboard) {\n\t\t\t\t\t\trequestAnimationFrame(() => {\n\t\t\t\t\t\t\tif (!event.defaultPrevented) {\n\t\t\t\t\t\t\t\tthis._zone.run(() => this.dismiss(OffcanvasDismissReasons.ESC));\n\t\t\t\t\t\t\t}\n\t\t\t\t\t\t});\n\t\t\t\t\t}\n\t\t\t\t});\n\t\t});\n\t}\n\n\tprivate _disableEventHandling() {\n\t\tthis._closed$.next();\n\t}\n\n\tprivate _setFocus() {\n\t\tconst { nativeElement } = this._elRef;\n\t\tif (!nativeElement.contains(document.activeElement)) {\n\t\t\tconst autoFocusable = nativeElement.querySelector(`[ngbAutofocus]`) as HTMLElement;\n\t\t\tconst firstFocusable = getFocusableBoundaryElements(nativeElement)[0];\n\n\t\t\tconst elementToFocus = autoFocusable || firstFocusable || nativeElement;\n\t\t\telementToFocus.focus();\n\t\t}\n\t}\n\n\tprivate _restoreFocus() {\n\t\tconst body = this._document.body;\n\t\tconst elWithFocus = this._elWithFocus;\n\n\t\tlet elementToFocus;\n\t\tif (elWithFocus && elWithFocus['focus'] && body.contains(elWithFocus)) {\n\t\t\telementToFocus = elWithFocus;\n\t\t} else {\n\t\t\telementToFocus = body;\n\t\t}\n\t\tthis._zone.runOutsideAngular(() => {\n\t\t\tsetTimeout(() => elementToFocus.focus());\n\t\t\tthis._elWithFocus = null;\n\t\t});\n\t}\n}\n"]}