@angular/cdk
Version:
Angular Material Component Development Kit
146 lines • 17.7 kB
JavaScript
/**
* @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 { Output, Directive, EventEmitter, Input, Optional, ChangeDetectorRef, SkipSelf, } from '@angular/core';
import { UniqueSelectionDispatcher } from '@angular/cdk/collections';
import { CdkAccordion } from './accordion';
import { coerceBooleanProperty } from '@angular/cdk/coercion';
import { Subscription } from 'rxjs';
/** Used to generate unique ID for each accordion item. */
let nextId = 0;
const ɵ0 = undefined;
/**
* An basic directive expected to be extended and decorated as a component. Sets up all
* events and attributes needed to be managed by a CdkAccordion parent.
*/
export class CdkAccordionItem {
constructor(accordion, _changeDetectorRef, _expansionDispatcher) {
this.accordion = accordion;
this._changeDetectorRef = _changeDetectorRef;
this._expansionDispatcher = _expansionDispatcher;
/** Subscription to openAll/closeAll events. */
this._openCloseAllSubscription = Subscription.EMPTY;
/** Event emitted every time the AccordionItem is closed. */
this.closed = new EventEmitter();
/** Event emitted every time the AccordionItem is opened. */
this.opened = new EventEmitter();
/** Event emitted when the AccordionItem is destroyed. */
this.destroyed = new EventEmitter();
/**
* Emits whenever the expanded state of the accordion changes.
* Primarily used to facilitate two-way binding.
* @docs-private
*/
this.expandedChange = new EventEmitter();
/** The unique AccordionItem id. */
this.id = `cdk-accordion-child-${nextId++}`;
this._expanded = false;
this._disabled = false;
/** Unregister function for _expansionDispatcher. */
this._removeUniqueSelectionListener = () => { };
this._removeUniqueSelectionListener =
_expansionDispatcher.listen((id, accordionId) => {
if (this.accordion && !this.accordion.multi &&
this.accordion.id === accordionId && this.id !== id) {
this.expanded = false;
}
});
// When an accordion item is hosted in an accordion, subscribe to open/close events.
if (this.accordion) {
this._openCloseAllSubscription = this._subscribeToOpenCloseAllActions();
}
}
/** Whether the AccordionItem is expanded. */
get expanded() { return this._expanded; }
set expanded(expanded) {
expanded = coerceBooleanProperty(expanded);
// Only emit events and update the internal value if the value changes.
if (this._expanded !== expanded) {
this._expanded = expanded;
this.expandedChange.emit(expanded);
if (expanded) {
this.opened.emit();
/**
* In the unique selection dispatcher, the id parameter is the id of the CdkAccordionItem,
* the name value is the id of the accordion.
*/
const accordionId = this.accordion ? this.accordion.id : this.id;
this._expansionDispatcher.notify(this.id, accordionId);
}
else {
this.closed.emit();
}
// Ensures that the animation will run when the value is set outside of an `@Input`.
// This includes cases like the open, close and toggle methods.
this._changeDetectorRef.markForCheck();
}
}
/** Whether the AccordionItem is disabled. */
get disabled() { return this._disabled; }
set disabled(disabled) { this._disabled = coerceBooleanProperty(disabled); }
/** Emits an event for the accordion item being destroyed. */
ngOnDestroy() {
this.opened.complete();
this.closed.complete();
this.destroyed.emit();
this.destroyed.complete();
this._removeUniqueSelectionListener();
this._openCloseAllSubscription.unsubscribe();
}
/** Toggles the expanded state of the accordion item. */
toggle() {
if (!this.disabled) {
this.expanded = !this.expanded;
}
}
/** Sets the expanded state of the accordion item to false. */
close() {
if (!this.disabled) {
this.expanded = false;
}
}
/** Sets the expanded state of the accordion item to true. */
open() {
if (!this.disabled) {
this.expanded = true;
}
}
_subscribeToOpenCloseAllActions() {
return this.accordion._openCloseAllActions.subscribe(expanded => {
// Only change expanded state if item is enabled
if (!this.disabled) {
this.expanded = expanded;
}
});
}
}
CdkAccordionItem.decorators = [
{ type: Directive, args: [{
selector: 'cdk-accordion-item, [cdkAccordionItem]',
exportAs: 'cdkAccordionItem',
providers: [
// Provide CdkAccordion as undefined to prevent nested accordion items from registering
// to the same accordion.
{ provide: CdkAccordion, useValue: ɵ0 },
],
},] }
];
CdkAccordionItem.ctorParameters = () => [
{ type: CdkAccordion, decorators: [{ type: Optional }, { type: SkipSelf }] },
{ type: ChangeDetectorRef },
{ type: UniqueSelectionDispatcher }
];
CdkAccordionItem.propDecorators = {
closed: [{ type: Output }],
opened: [{ type: Output }],
destroyed: [{ type: Output }],
expandedChange: [{ type: Output }],
expanded: [{ type: Input }],
disabled: [{ type: Input }]
};
export { ɵ0 };
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Sets up all\n * events and attributes needed to be managed by a CdkAccordion parent.\n */\n@Directive({\n  selector: 'cdk-accordion-item, [cdkAccordionItem]',\n  exportAs: 'cdkAccordionItem',\n  providers: [\n    // Provide CdkAccordion as undefined to prevent nested accordion items from registering\n    // to the same accordion.\n    {provide: CdkAccordion, useValue: undefined},\n  ],\n})\nexport class CdkAccordionItem implements OnDestroy {\n  /** Subscription to openAll/closeAll events. */\n  private _openCloseAllSubscription = Subscription.EMPTY;\n  /** Event emitted every time the AccordionItem is closed. */\n  @Output() closed: EventEmitter<void> = new EventEmitter<void>();\n  /** Event emitted every time the AccordionItem is opened. */\n  @Output() opened: EventEmitter<void> = new EventEmitter<void>();\n  /** Event emitted when the AccordionItem is destroyed. */\n  @Output() destroyed: EventEmitter<void> = new EventEmitter<void>();\n\n  /**\n   * Emits whenever the expanded state of the accordion changes.\n   * Primarily used to facilitate two-way binding.\n   * @docs-private\n   */\n  @Output() expandedChange: EventEmitter<boolean> = new EventEmitter<boolean>();\n\n  /** The unique AccordionItem id. */\n  readonly id: string = `cdk-accordion-child-${nextId++}`;\n\n  /** Whether the AccordionItem is expanded. */\n  @Input()\n  get expanded(): any { return this._expanded; }\n  set expanded(expanded: any) {\n    expanded = coerceBooleanProperty(expanded);\n\n    // Only emit events and update the internal value if the value changes.\n    if (this._expanded !== expanded) {\n      this._expanded = expanded;\n      this.expandedChange.emit(expanded);\n\n      if (expanded) {\n        this.opened.emit();\n        /**\n         * In the unique selection dispatcher, the id parameter is the id of the CdkAccordionItem,\n         * the name value is the id of the accordion.\n         */\n        const accordionId = this.accordion ? this.accordion.id : this.id;\n        this._expansionDispatcher.notify(this.id, accordionId);\n      } else {\n        this.closed.emit();\n      }\n\n      // Ensures that the animation will run when the value is set outside of an `@Input`.\n      // This includes cases like the open, close and toggle methods.\n      this._changeDetectorRef.markForCheck();\n    }\n  }\n  private _expanded = false;\n\n  /** Whether the AccordionItem is disabled. */\n  @Input()\n  get disabled() { return this._disabled; }\n  set disabled(disabled: any) { this._disabled = coerceBooleanProperty(disabled); }\n  private _disabled: boolean = false;\n\n  /** Unregister function for _expansionDispatcher. */\n  private _removeUniqueSelectionListener: () => void = () => {};\n\n  constructor(@Optional() @SkipSelf() public accordion: CdkAccordion,\n              private _changeDetectorRef: ChangeDetectorRef,\n              protected _expansionDispatcher: UniqueSelectionDispatcher) {\n    this._removeUniqueSelectionListener =\n      _expansionDispatcher.listen((id: string, accordionId: string) => {\n        if (this.accordion && !this.accordion.multi &&\n            this.accordion.id === accordionId && this.id !== id) {\n          this.expanded = false;\n        }\n      });\n\n    // When an accordion item is hosted in an accordion, subscribe to open/close events.\n    if (this.accordion) {\n      this._openCloseAllSubscription = this._subscribeToOpenCloseAllActions();\n    }\n  }\n\n  /** Emits an event for the accordion item being destroyed. */\n  ngOnDestroy() {\n    this.opened.complete();\n    this.closed.complete();\n    this.destroyed.emit();\n    this.destroyed.complete();\n    this._removeUniqueSelectionListener();\n    this._openCloseAllSubscription.unsubscribe();\n  }\n\n  /** Toggles the expanded state of the accordion item. */\n  toggle(): void {\n    if (!this.disabled) {\n      this.expanded = !this.expanded;\n    }\n  }\n\n  /** Sets the expanded state of the accordion item to false. */\n  close(): void {\n    if (!this.disabled) {\n      this.expanded = false;\n    }\n  }\n\n  /** Sets the expanded state of the accordion item to true. */\n  open(): void {\n    if (!this.disabled) {\n      this.expanded = true;\n    }\n  }\n\n  private _subscribeToOpenCloseAllActions(): Subscription {\n    return this.accordion._openCloseAllActions.subscribe(expanded => {\n      // Only change expanded state if item is enabled\n      if (!this.disabled) {\n        this.expanded = expanded;\n      }\n    });\n  }\n\n  static ngAcceptInputType_expanded: BooleanInput;\n  static ngAcceptInputType_disabled: BooleanInput;\n}\n"]}