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@ionic/angular

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Angular specific wrappers for @ionic/core

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import { Directive, ElementRef, EventEmitter, HostListener, Output, ViewChild, } from '@angular/core'; import * as i0 from "@angular/core"; import * as i1 from "../../providers/nav-controller"; // eslint-disable-next-line @angular-eslint/directive-class-suffix export class IonTabs { navCtrl; tabsInner; /** * Emitted before the tab view is changed. */ ionTabsWillChange = new EventEmitter(); /** * Emitted after the tab view is changed. */ ionTabsDidChange = new EventEmitter(); tabBarSlot = 'bottom'; constructor(navCtrl) { this.navCtrl = navCtrl; } ngAfterContentInit() { this.detectSlotChanges(); } ngAfterContentChecked() { this.detectSlotChanges(); } /** * @internal */ onStackWillChange({ enteringView, tabSwitch }) { const stackId = enteringView.stackId; if (tabSwitch && stackId !== undefined) { this.ionTabsWillChange.emit({ tab: stackId }); } } /** * @internal */ onStackDidChange({ enteringView, tabSwitch }) { const stackId = enteringView.stackId; if (tabSwitch && stackId !== undefined) { if (this.tabBar) { this.tabBar.selectedTab = stackId; } this.ionTabsDidChange.emit({ tab: stackId }); } } /** * When a tab button is clicked, there are several scenarios: * 1. If the selected tab is currently active (the tab button has been clicked * again), then it should go to the root view for that tab. * * a. Get the saved root view from the router outlet. If the saved root view * matches the tabRootUrl, set the route view to this view including the * navigation extras. * b. If the saved root view from the router outlet does * not match, navigate to the tabRootUrl. No navigation extras are * included. * * 2. If the current tab tab is not currently selected, get the last route * view from the router outlet. * * a. If the last route view exists, navigate to that view including any * navigation extras * b. If the last route view doesn't exist, then navigate * to the default tabRootUrl */ select(tabOrEvent) { const isTabString = typeof tabOrEvent === 'string'; const tab = isTabString ? tabOrEvent : tabOrEvent.detail.tab; const alreadySelected = this.outlet.getActiveStackId() === tab; const tabRootUrl = `${this.outlet.tabsPrefix}/${tab}`; /** * If this is a nested tab, prevent the event * from bubbling otherwise the outer tabs * will respond to this event too, causing * the app to get directed to the wrong place. */ if (!isTabString) { tabOrEvent.stopPropagation(); } if (alreadySelected) { const activeStackId = this.outlet.getActiveStackId(); const activeView = this.outlet.getLastRouteView(activeStackId); // If on root tab, do not navigate to root tab again if (activeView?.url === tabRootUrl) { return; } const rootView = this.outlet.getRootView(tab); const navigationExtras = rootView && tabRootUrl === rootView.url && rootView.savedExtras; return this.navCtrl.navigateRoot(tabRootUrl, { ...navigationExtras, animated: true, animationDirection: 'back', }); } else { const lastRoute = this.outlet.getLastRouteView(tab); /** * If there is a lastRoute, goto that, otherwise goto the fallback url of the * selected tab */ const url = lastRoute?.url || tabRootUrl; const navigationExtras = lastRoute?.savedExtras; return this.navCtrl.navigateRoot(url, { ...navigationExtras, animated: true, animationDirection: 'back', }); } } getSelected() { return this.outlet.getActiveStackId(); } /** * Detects changes to the slot attribute of the tab bar. * * If the slot attribute has changed, then the tab bar * should be relocated to the new slot position. */ detectSlotChanges() { this.tabBars.forEach((tabBar) => { // el is a protected attribute from the generated component wrapper const currentSlot = tabBar.el.getAttribute('slot'); if (currentSlot !== this.tabBarSlot) { this.tabBarSlot = currentSlot; this.relocateTabBar(); } }); } /** * Relocates the tab bar to the new slot position. */ relocateTabBar() { /** * `el` is a protected attribute from the generated component wrapper. * To avoid having to manually create the wrapper for tab bar, we * cast the tab bar to any and access the protected attribute. */ const tabBar = this.tabBar.el; if (this.tabBarSlot === 'top') { /** * A tab bar with a slot of "top" should be inserted * at the top of the container. */ this.tabsInner.nativeElement.before(tabBar); } else { /** * A tab bar with a slot of "bottom" or without a slot * should be inserted at the end of the container. */ this.tabsInner.nativeElement.after(tabBar); } } /** @nocollapse */ static ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "16.2.12", ngImport: i0, type: IonTabs, deps: [{ token: i1.NavController }], target: i0.ɵɵFactoryTarget.Directive }); /** @nocollapse */ static ɵdir = i0.ɵɵngDeclareDirective({ minVersion: "14.0.0", version: "16.2.12", type: IonTabs, selector: "ion-tabs", outputs: { ionTabsWillChange: "ionTabsWillChange", ionTabsDidChange: "ionTabsDidChange" }, host: { listeners: { "ionTabButtonClick": "select($event)" } }, viewQueries: [{ propertyName: "tabsInner", first: true, predicate: ["tabsInner"], descendants: true, read: ElementRef, static: true }], ngImport: i0 }); } i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "16.2.12", ngImport: i0, type: IonTabs, decorators: [{ type: Directive, args: [{ selector: 'ion-tabs', }] }], ctorParameters: function () { return [{ type: i1.NavController }]; }, propDecorators: { tabsInner: [{ type: ViewChild, args: ['tabsInner', { read: ElementRef, static: true }] }], ionTabsWillChange: [{ type: Output }], ionTabsDidChange: [{ type: Output }], select: [{ type: HostListener, args: ['ionTabButtonClick', ['$event']] }] } }); //# 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{\n  AfterContentChecked,\n  AfterContentInit,\n  Directive,\n  ElementRef,\n  EventEmitter,\n  HostListener,\n  Output,\n  ViewChild,\n} from '@angular/core';\n\nimport { NavController } from '../../providers/nav-controller';\n\nimport { StackDidChangeEvent, StackWillChangeEvent } from './stack-utils';\n\n@Directive({\n  selector: 'ion-tabs',\n})\n// eslint-disable-next-line @angular-eslint/directive-class-suffix\nexport abstract class IonTabs implements AfterContentInit, AfterContentChecked {\n  /**\n   * Note: These must be redeclared on each child class since it needs\n   * access to generated components such as IonRouterOutlet and IonTabBar.\n   */\n  abstract outlet: any;\n  abstract tabBar: any;\n  abstract tabBars: any;\n\n  @ViewChild('tabsInner', { read: ElementRef, static: true }) tabsInner: ElementRef<HTMLDivElement>;\n\n  /**\n   * Emitted before the tab view is changed.\n   */\n  @Output() ionTabsWillChange = new EventEmitter<{ tab: string }>();\n  /**\n   * Emitted after the tab view is changed.\n   */\n  @Output() ionTabsDidChange = new EventEmitter<{ tab: string }>();\n\n  private tabBarSlot = 'bottom';\n\n  constructor(private navCtrl: NavController) {}\n\n  ngAfterContentInit(): void {\n    this.detectSlotChanges();\n  }\n\n  ngAfterContentChecked(): void {\n    this.detectSlotChanges();\n  }\n\n  /**\n   * @internal\n   */\n  onStackWillChange({ enteringView, tabSwitch }: StackWillChangeEvent): void {\n    const stackId = enteringView.stackId;\n    if (tabSwitch && stackId !== undefined) {\n      this.ionTabsWillChange.emit({ tab: stackId });\n    }\n  }\n\n  /**\n   * @internal\n   */\n  onStackDidChange({ enteringView, tabSwitch }: StackDidChangeEvent): void {\n    const stackId = enteringView.stackId;\n    if (tabSwitch && stackId !== undefined) {\n      if (this.tabBar) {\n        this.tabBar.selectedTab = stackId;\n      }\n      this.ionTabsDidChange.emit({ tab: stackId });\n    }\n  }\n\n  /**\n   * When a tab button is clicked, there are several scenarios:\n   * 1. If the selected tab is currently active (the tab button has been clicked\n   *    again), then it should go to the root view for that tab.\n   *\n   *   a. Get the saved root view from the router outlet. If the saved root view\n   *      matches the tabRootUrl, set the route view to this view including the\n   *      navigation extras.\n   *   b. If the saved root view from the router outlet does\n   *      not match, navigate to the tabRootUrl. No navigation extras are\n   *      included.\n   *\n   * 2. If the current tab tab is not currently selected, get the last route\n   *    view from the router outlet.\n   *\n   *   a. If the last route view exists, navigate to that view including any\n   *      navigation extras\n   *   b. If the last route view doesn't exist, then navigate\n   *      to the default tabRootUrl\n   */\n  @HostListener('ionTabButtonClick', ['$event'])\n  select(tabOrEvent: string | CustomEvent): Promise<boolean> | undefined {\n    const isTabString = typeof tabOrEvent === 'string';\n    const tab = isTabString ? tabOrEvent : (tabOrEvent as CustomEvent).detail.tab;\n    const alreadySelected = this.outlet.getActiveStackId() === tab;\n    const tabRootUrl = `${this.outlet.tabsPrefix}/${tab}`;\n\n    /**\n     * If this is a nested tab, prevent the event\n     * from bubbling otherwise the outer tabs\n     * will respond to this event too, causing\n     * the app to get directed to the wrong place.\n     */\n    if (!isTabString) {\n      (tabOrEvent as CustomEvent).stopPropagation();\n    }\n\n    if (alreadySelected) {\n      const activeStackId = this.outlet.getActiveStackId();\n      const activeView = this.outlet.getLastRouteView(activeStackId);\n\n      // If on root tab, do not navigate to root tab again\n      if (activeView?.url === tabRootUrl) {\n        return;\n      }\n\n      const rootView = this.outlet.getRootView(tab);\n      const navigationExtras = rootView && tabRootUrl === rootView.url && rootView.savedExtras;\n      return this.navCtrl.navigateRoot(tabRootUrl, {\n        ...navigationExtras,\n        animated: true,\n        animationDirection: 'back',\n      });\n    } else {\n      const lastRoute = this.outlet.getLastRouteView(tab);\n      /**\n       * If there is a lastRoute, goto that, otherwise goto the fallback url of the\n       * selected tab\n       */\n      const url = lastRoute?.url || tabRootUrl;\n      const navigationExtras = lastRoute?.savedExtras;\n\n      return this.navCtrl.navigateRoot(url, {\n        ...navigationExtras,\n        animated: true,\n        animationDirection: 'back',\n      });\n    }\n  }\n\n  getSelected(): string | undefined {\n    return this.outlet.getActiveStackId();\n  }\n\n  /**\n   * Detects changes to the slot attribute of the tab bar.\n   *\n   * If the slot attribute has changed, then the tab bar\n   * should be relocated to the new slot position.\n   */\n  private detectSlotChanges(): void {\n    this.tabBars.forEach((tabBar: any) => {\n      // el is a protected attribute from the generated component wrapper\n      const currentSlot = tabBar.el.getAttribute('slot');\n\n      if (currentSlot !== this.tabBarSlot) {\n        this.tabBarSlot = currentSlot;\n        this.relocateTabBar();\n      }\n    });\n  }\n\n  /**\n   * Relocates the tab bar to the new slot position.\n   */\n  private relocateTabBar(): void {\n    /**\n     * `el` is a protected attribute from the generated component wrapper.\n     * To avoid having to manually create the wrapper for tab bar, we\n     * cast the tab bar to any and access the protected attribute.\n     */\n    const tabBar = (this.tabBar as any).el as HTMLElement;\n\n    if (this.tabBarSlot === 'top') {\n      /**\n       * A tab bar with a slot of \"top\" should be inserted\n       * at the top of the container.\n       */\n      this.tabsInner.nativeElement.before(tabBar);\n    } else {\n      /**\n       * A tab bar with a slot of \"bottom\" or without a slot\n       * should be inserted at the end of the container.\n       */\n      this.tabsInner.nativeElement.after(tabBar);\n    }\n  }\n}\n"]}