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@angular/cdk

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Angular Material Component Development Kit

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/** * @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 { Directive, EventEmitter, inject, InjectionToken, Injector, ViewContainerRef, } from '@angular/core'; import { MENU_STACK } from './menu-stack'; import { TemplatePortal } from '@angular/cdk/portal'; import { merge, Subject } from 'rxjs'; import * as i0 from "@angular/core"; /** Injection token used for an implementation of MenuStack. */ export const MENU_TRIGGER = new InjectionToken('cdk-menu-trigger'); /** * Abstract directive that implements shared logic common to all menu triggers. * This class can be extended to create custom menu trigger types. */ class CdkMenuTriggerBase { constructor() { /** The DI injector for this component. */ this.injector = inject(Injector); /** The view container ref for this component */ this.viewContainerRef = inject(ViewContainerRef); /** The menu stack in which this menu resides. */ this.menuStack = inject(MENU_STACK); /** Emits when the attached menu is requested to open */ this.opened = new EventEmitter(); /** Emits when the attached menu is requested to close */ this.closed = new EventEmitter(); /** A reference to the overlay which manages the triggered menu */ this.overlayRef = null; /** Emits when this trigger is destroyed. */ this.destroyed = new Subject(); /** Emits when the outside pointer events listener on the overlay should be stopped. */ this.stopOutsideClicksListener = merge(this.closed, this.destroyed); } ngOnDestroy() { this._destroyOverlay(); this.destroyed.next(); this.destroyed.complete(); } /** Whether the attached menu is open. */ isOpen() { return !!this.overlayRef?.hasAttached(); } /** Registers a child menu as having been opened by this trigger. */ registerChildMenu(child) { this.childMenu = child; } /** * Get the portal to be attached to the overlay which contains the menu. Allows for the menu * content to change dynamically and be reflected in the application. */ getMenuContentPortal() { const hasMenuContentChanged = this.menuTemplateRef !== this._menuPortal?.templateRef; if (this.menuTemplateRef && (!this._menuPortal || hasMenuContentChanged)) { this._menuPortal = new TemplatePortal(this.menuTemplateRef, this.viewContainerRef, this.menuData, this._getChildMenuInjector()); } return this._menuPortal; } /** * Whether the given element is inside the scope of this trigger's menu stack. * @param element The element to check. * @return Whether the element is inside the scope of this trigger's menu stack. */ isElementInsideMenuStack(element) { for (let el = element; el; el = el?.parentElement ?? null) { if (el.getAttribute('data-cdk-menu-stack-id') === this.menuStack.id) { return true; } } return false; } /** Destroy and unset the overlay reference it if exists */ _destroyOverlay() { if (this.overlayRef) { this.overlayRef.dispose(); this.overlayRef = null; } } /** Gets the injector to use when creating a child menu. */ _getChildMenuInjector() { this._childMenuInjector = this._childMenuInjector || Injector.create({ providers: [ { provide: MENU_TRIGGER, useValue: this }, { provide: MENU_STACK, useValue: this.menuStack }, ], parent: this.injector, }); return this._childMenuInjector; } static { this.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "16.0.0", ngImport: i0, type: CdkMenuTriggerBase, deps: [], target: i0.ɵɵFactoryTarget.Directive }); } static { this.ɵdir = i0.ɵɵngDeclareDirective({ minVersion: "14.0.0", version: "16.0.0", type: CdkMenuTriggerBase, host: { properties: { "attr.aria-controls": "childMenu?.id", "attr.data-cdk-menu-stack-id": "menuStack.id" } }, ngImport: i0 }); } } export { CdkMenuTriggerBase }; i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "16.0.0", ngImport: i0, type: CdkMenuTriggerBase, decorators: [{ type: Directive, args: [{ host: { '[attr.aria-controls]': 'childMenu?.id', '[attr.data-cdk-menu-stack-id]': 'menuStack.id', }, }] }] }); //# 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* @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 {\n  Directive,\n  EventEmitter,\n  inject,\n  InjectionToken,\n  Injector,\n  OnDestroy,\n  TemplateRef,\n  ViewContainerRef,\n} from '@angular/core';\nimport {Menu} from './menu-interface';\nimport {MENU_STACK, MenuStack} from './menu-stack';\nimport {ConnectedPosition, OverlayRef} from '@angular/cdk/overlay';\nimport {TemplatePortal} from '@angular/cdk/portal';\nimport {merge, Subject} from 'rxjs';\n\n/** Injection token used for an implementation of MenuStack. */\nexport const MENU_TRIGGER = new InjectionToken<CdkMenuTriggerBase>('cdk-menu-trigger');\n\n/**\n * Abstract directive that implements shared logic common to all menu triggers.\n * This class can be extended to create custom menu trigger types.\n */\n@Directive({\n  host: {\n    '[attr.aria-controls]': 'childMenu?.id',\n    '[attr.data-cdk-menu-stack-id]': 'menuStack.id',\n  },\n})\nexport abstract class CdkMenuTriggerBase implements OnDestroy {\n  /** The DI injector for this component. */\n  readonly injector = inject(Injector);\n\n  /** The view container ref for this component */\n  protected readonly viewContainerRef = inject(ViewContainerRef);\n\n  /** The menu stack in which this menu resides. */\n  protected readonly menuStack: MenuStack = inject(MENU_STACK);\n\n  /**\n   * A list of preferred menu positions to be used when constructing the\n   * `FlexibleConnectedPositionStrategy` for this trigger's menu.\n   */\n  menuPosition: ConnectedPosition[];\n\n  /** Emits when the attached menu is requested to open */\n  readonly opened: EventEmitter<void> = new EventEmitter();\n\n  /** Emits when the attached menu is requested to close */\n  readonly closed: EventEmitter<void> = new EventEmitter();\n\n  /** Template reference variable to the menu this trigger opens */\n  menuTemplateRef: TemplateRef<unknown> | null;\n\n  /** Context data to be passed along to the menu template */\n  menuData: unknown;\n\n  /** A reference to the overlay which manages the triggered menu */\n  protected overlayRef: OverlayRef | null = null;\n\n  /** Emits when this trigger is destroyed. */\n  protected readonly destroyed: Subject<void> = new Subject();\n\n  /** Emits when the outside pointer events listener on the overlay should be stopped. */\n  protected readonly stopOutsideClicksListener = merge(this.closed, this.destroyed);\n\n  /** The child menu opened by this trigger. */\n  protected childMenu?: Menu;\n\n  /** The content of the menu panel opened by this trigger. */\n  private _menuPortal: TemplatePortal;\n\n  /** The injector to use for the child menu opened by this trigger. */\n  private _childMenuInjector?: Injector;\n\n  ngOnDestroy() {\n    this._destroyOverlay();\n\n    this.destroyed.next();\n    this.destroyed.complete();\n  }\n\n  /** Whether the attached menu is open. */\n  isOpen() {\n    return !!this.overlayRef?.hasAttached();\n  }\n\n  /** Registers a child menu as having been opened by this trigger. */\n  registerChildMenu(child: Menu) {\n    this.childMenu = child;\n  }\n\n  /**\n   * Get the portal to be attached to the overlay which contains the menu. Allows for the menu\n   * content to change dynamically and be reflected in the application.\n   */\n  protected getMenuContentPortal() {\n    const hasMenuContentChanged = this.menuTemplateRef !== this._menuPortal?.templateRef;\n    if (this.menuTemplateRef && (!this._menuPortal || hasMenuContentChanged)) {\n      this._menuPortal = new TemplatePortal(\n        this.menuTemplateRef,\n        this.viewContainerRef,\n        this.menuData,\n        this._getChildMenuInjector(),\n      );\n    }\n\n    return this._menuPortal;\n  }\n\n  /**\n   * Whether the given element is inside the scope of this trigger's menu stack.\n   * @param element The element to check.\n   * @return Whether the element is inside the scope of this trigger's menu stack.\n   */\n  protected isElementInsideMenuStack(element: Element) {\n    for (let el: Element | null = element; el; el = el?.parentElement ?? null) {\n      if (el.getAttribute('data-cdk-menu-stack-id') === this.menuStack.id) {\n        return true;\n      }\n    }\n    return false;\n  }\n\n  /** Destroy and unset the overlay reference it if exists */\n  private _destroyOverlay() {\n    if (this.overlayRef) {\n      this.overlayRef.dispose();\n      this.overlayRef = null;\n    }\n  }\n\n  /** Gets the injector to use when creating a child menu. */\n  private _getChildMenuInjector() {\n    this._childMenuInjector =\n      this._childMenuInjector ||\n      Injector.create({\n        providers: [\n          {provide: MENU_TRIGGER, useValue: this},\n          {provide: MENU_STACK, useValue: this.menuStack},\n        ],\n        parent: this.injector,\n      });\n    return this._childMenuInjector;\n  }\n}\n"]}