@angular/material/fesm2022/tabs.mjs

Angular Material

import { FocusKeyManager, _IdGenerator, CdkMonitorFocus, FocusMonitor } from '@angular/cdk/a11y';
import { Directionality, BidiModule } from '@angular/cdk/bidi';
import { hasModifierKey, SPACE, ENTER } from '@angular/cdk/keycodes';
import { SharedResizeObserver } from '@angular/cdk/observers/private';
import { Platform } from '@angular/cdk/platform';
import { ViewportRuler, CdkScrollable } from '@angular/cdk/scrolling';
import * as i0 from '@angular/core';
import { InjectionToken, inject, TemplateRef, Directive, ViewContainerRef, booleanAttribute, Component, ChangeDetectionStrategy, ViewEncapsulation, Input, ContentChild, ViewChild, ElementRef, ChangeDetectorRef, NgZone, Injector, Renderer2, EventEmitter, afterNextRender, numberAttribute, Output, ContentChildren, QueryList, ViewChildren, signal, forwardRef, computed, HostAttributeToken, NgModule } from '@angular/core';
import { Subject, of, merge, EMPTY, Observable, timer, Subscription, BehaviorSubject } from 'rxjs';
import { debounceTime, takeUntil, startWith, switchMap, skip, filter } from 'rxjs/operators';
import { _animationsDisabled } from './_animation-chunk.mjs';
import { CdkPortal, TemplatePortal, CdkPortalOutlet } from '@angular/cdk/portal';
import { _CdkPrivateStyleLoader } from '@angular/cdk/private';
import { _StructuralStylesLoader } from './_structural-styles-chunk.mjs';
import { CdkObserveContent } from '@angular/cdk/observers';
import { MatRipple, MAT_RIPPLE_GLOBAL_OPTIONS } from './_ripple-chunk.mjs';
import '@angular/cdk/layout';
import '@angular/cdk/coercion';

const MAT_TAB_CONTENT = new InjectionToken('MatTabContent');
class MatTabContent {
  template = inject(TemplateRef);
  constructor() {}
  static ɵfac = i0.ɵɵngDeclareFactory({
    minVersion: "12.0.0",
    version: "21.0.0",
    ngImport: i0,
    type: MatTabContent,
    deps: [],
    target: i0.ɵɵFactoryTarget.Directive
  });
  static ɵdir = i0.ɵɵngDeclareDirective({
    minVersion: "14.0.0",
    version: "21.0.0",
    type: MatTabContent,
    isStandalone: true,
    selector: "[matTabContent]",
    providers: [{
      provide: MAT_TAB_CONTENT,
      useExisting: MatTabContent
    }],
    ngImport: i0
  });
}
i0.ɵɵngDeclareClassMetadata({
  minVersion: "12.0.0",
  version: "21.0.0",
  ngImport: i0,
  type: MatTabContent,
  decorators: [{
    type: Directive,
    args: [{
      selector: '[matTabContent]',
      providers: [{
        provide: MAT_TAB_CONTENT,
        useExisting: MatTabContent
      }]
    }]
  }],
  ctorParameters: () => []
});

const MAT_TAB_LABEL = new InjectionToken('MatTabLabel');
const MAT_TAB = new InjectionToken('MAT_TAB');
class MatTabLabel extends CdkPortal {
  _closestTab = inject(MAT_TAB, {
    optional: true
  });
  static ɵfac = i0.ɵɵngDeclareFactory({
    minVersion: "12.0.0",
    version: "21.0.0",
    ngImport: i0,
    type: MatTabLabel,
    deps: null,
    target: i0.ɵɵFactoryTarget.Directive
  });
  static ɵdir = i0.ɵɵngDeclareDirective({
    minVersion: "14.0.0",
    version: "21.0.0",
    type: MatTabLabel,
    isStandalone: true,
    selector: "[mat-tab-label], [matTabLabel]",
    providers: [{
      provide: MAT_TAB_LABEL,
      useExisting: MatTabLabel
    }],
    usesInheritance: true,
    ngImport: i0
  });
}
i0.ɵɵngDeclareClassMetadata({
  minVersion: "12.0.0",
  version: "21.0.0",
  ngImport: i0,
  type: MatTabLabel,
  decorators: [{
    type: Directive,
    args: [{
      selector: '[mat-tab-label], [matTabLabel]',
      providers: [{
        provide: MAT_TAB_LABEL,
        useExisting: MatTabLabel
      }]
    }]
  }]
});

const MAT_TAB_GROUP = new InjectionToken('MAT_TAB_GROUP');
class MatTab {
  _viewContainerRef = inject(ViewContainerRef);
  _closestTabGroup = inject(MAT_TAB_GROUP, {
    optional: true
  });
  disabled = false;
  get templateLabel() {
    return this._templateLabel;
  }
  set templateLabel(value) {
    this._setTemplateLabelInput(value);
  }
  _templateLabel;
  _explicitContent = undefined;
  _implicitContent;
  textLabel = '';
  ariaLabel;
  ariaLabelledby;
  labelClass;
  bodyClass;
  id = null;
  _contentPortal = null;
  get content() {
    return this._contentPortal;
  }
  _stateChanges = new Subject();
  position = null;
  origin = null;
  isActive = false;
  constructor() {
    inject(_CdkPrivateStyleLoader).load(_StructuralStylesLoader);
  }
  ngOnChanges(changes) {
    if (changes.hasOwnProperty('textLabel') || changes.hasOwnProperty('disabled')) {
      this._stateChanges.next();
    }
  }
  ngOnDestroy() {
    this._stateChanges.complete();
  }
  ngOnInit() {
    this._contentPortal = new TemplatePortal(this._explicitContent || this._implicitContent, this._viewContainerRef);
  }
  _setTemplateLabelInput(value) {
    if (value && value._closestTab === this) {
      this._templateLabel = value;
    }
  }
  static ɵfac = i0.ɵɵngDeclareFactory({
    minVersion: "12.0.0",
    version: "21.0.0",
    ngImport: i0,
    type: MatTab,
    deps: [],
    target: i0.ɵɵFactoryTarget.Component
  });
  static ɵcmp = i0.ɵɵngDeclareComponent({
    minVersion: "16.1.0",
    version: "21.0.0",
    type: MatTab,
    isStandalone: true,
    selector: "mat-tab",
    inputs: {
      disabled: ["disabled", "disabled", booleanAttribute],
      textLabel: ["label", "textLabel"],
      ariaLabel: ["aria-label", "ariaLabel"],
      ariaLabelledby: ["aria-labelledby", "ariaLabelledby"],
      labelClass: "labelClass",
      bodyClass: "bodyClass",
      id: "id"
    },
    host: {
      attributes: {
        "hidden": ""
      },
      properties: {
        "attr.id": "null"
      }
    },
    providers: [{
      provide: MAT_TAB,
      useExisting: MatTab
    }],
    queries: [{
      propertyName: "templateLabel",
      first: true,
      predicate: MatTabLabel,
      descendants: true
    }, {
      propertyName: "_explicitContent",
      first: true,
      predicate: MatTabContent,
      descendants: true,
      read: TemplateRef,
      static: true
    }],
    viewQueries: [{
      propertyName: "_implicitContent",
      first: true,
      predicate: TemplateRef,
      descendants: true,
      static: true
    }],
    exportAs: ["matTab"],
    usesOnChanges: true,
    ngImport: i0,
    template: "<!-- Create a template for the content of the <mat-tab> so that we can grab a reference to this\n    TemplateRef and use it in a Portal to render the tab content in the appropriate place in the\n    tab-group. -->\n<ng-template><ng-content></ng-content></ng-template>\n",
    changeDetection: i0.ChangeDetectionStrategy.Default,
    encapsulation: i0.ViewEncapsulation.None
  });
}
i0.ɵɵngDeclareClassMetadata({
  minVersion: "12.0.0",
  version: "21.0.0",
  ngImport: i0,
  type: MatTab,
  decorators: [{
    type: Component,
    args: [{
      selector: 'mat-tab',
      changeDetection: ChangeDetectionStrategy.Default,
      encapsulation: ViewEncapsulation.None,
      exportAs: 'matTab',
      providers: [{
        provide: MAT_TAB,
        useExisting: MatTab
      }],
      host: {
        'hidden': '',
        '[attr.id]': 'null'
      },
      template: "<!-- Create a template for the content of the <mat-tab> so that we can grab a reference to this\n    TemplateRef and use it in a Portal to render the tab content in the appropriate place in the\n    tab-group. -->\n<ng-template><ng-content></ng-content></ng-template>\n"
    }]
  }],
  ctorParameters: () => [],
  propDecorators: {
    disabled: [{
      type: Input,
      args: [{
        transform: booleanAttribute
      }]
    }],
    templateLabel: [{
      type: ContentChild,
      args: [MatTabLabel]
    }],
    _explicitContent: [{
      type: ContentChild,
      args: [MatTabContent, {
        read: TemplateRef,
        static: true
      }]
    }],
    _implicitContent: [{
      type: ViewChild,
      args: [TemplateRef, {
        static: true
      }]
    }],
    textLabel: [{
      type: Input,
      args: ['label']
    }],
    ariaLabel: [{
      type: Input,
      args: ['aria-label']
    }],
    ariaLabelledby: [{
      type: Input,
      args: ['aria-labelledby']
    }],
    labelClass: [{
      type: Input
    }],
    bodyClass: [{
      type: Input
    }],
    id: [{
      type: Input
    }]
  }
});

const ACTIVE_CLASS = 'mdc-tab-indicator--active';
const NO_TRANSITION_CLASS = 'mdc-tab-indicator--no-transition';
class MatInkBar {
  _items;
  _currentItem;
  constructor(_items) {
    this._items = _items;
  }
  hide() {
    this._items.forEach(item => item.deactivateInkBar());
    this._currentItem = undefined;
  }
  alignToElement(element) {
    const correspondingItem = this._items.find(item => item.elementRef.nativeElement === element);
    const currentItem = this._currentItem;
    if (correspondingItem === currentItem) {
      return;
    }
    currentItem?.deactivateInkBar();
    if (correspondingItem) {
      const domRect = currentItem?.elementRef.nativeElement.getBoundingClientRect?.();
      correspondingItem.activateInkBar(domRect);
      this._currentItem = correspondingItem;
    }
  }
}
class InkBarItem {
  _elementRef = inject(ElementRef);
  _inkBarElement;
  _inkBarContentElement;
  _fitToContent = false;
  get fitInkBarToContent() {
    return this._fitToContent;
  }
  set fitInkBarToContent(newValue) {
    if (this._fitToContent !== newValue) {
      this._fitToContent = newValue;
      if (this._inkBarElement) {
        this._appendInkBarElement();
      }
    }
  }
  activateInkBar(previousIndicatorClientRect) {
    const element = this._elementRef.nativeElement;
    if (!previousIndicatorClientRect || !element.getBoundingClientRect || !this._inkBarContentElement) {
      element.classList.add(ACTIVE_CLASS);
      return;
    }
    const currentClientRect = element.getBoundingClientRect();
    const widthDelta = previousIndicatorClientRect.width / currentClientRect.width;
    const xPosition = previousIndicatorClientRect.left - currentClientRect.left;
    element.classList.add(NO_TRANSITION_CLASS);
    this._inkBarContentElement.style.setProperty('transform', `translateX(${xPosition}px) scaleX(${widthDelta})`);
    element.getBoundingClientRect();
    element.classList.remove(NO_TRANSITION_CLASS);
    element.classList.add(ACTIVE_CLASS);
    this._inkBarContentElement.style.setProperty('transform', '');
  }
  deactivateInkBar() {
    this._elementRef.nativeElement.classList.remove(ACTIVE_CLASS);
  }
  ngOnInit() {
    this._createInkBarElement();
  }
  ngOnDestroy() {
    this._inkBarElement?.remove();
    this._inkBarElement = this._inkBarContentElement = null;
  }
  _createInkBarElement() {
    const documentNode = this._elementRef.nativeElement.ownerDocument || document;
    const inkBarElement = this._inkBarElement = documentNode.createElement('span');
    const inkBarContentElement = this._inkBarContentElement = documentNode.createElement('span');
    inkBarElement.className = 'mdc-tab-indicator';
    inkBarContentElement.className = 'mdc-tab-indicator__content mdc-tab-indicator__content--underline';
    inkBarElement.appendChild(this._inkBarContentElement);
    this._appendInkBarElement();
  }
  _appendInkBarElement() {
    if (!this._inkBarElement && (typeof ngDevMode === 'undefined' || ngDevMode)) {
      throw Error('Ink bar element has not been created and cannot be appended');
    }
    const parentElement = this._fitToContent ? this._elementRef.nativeElement.querySelector('.mdc-tab__content') : this._elementRef.nativeElement;
    if (!parentElement && (typeof ngDevMode === 'undefined' || ngDevMode)) {
      throw Error('Missing element to host the ink bar');
    }
    parentElement.appendChild(this._inkBarElement);
  }
  static ɵfac = i0.ɵɵngDeclareFactory({
    minVersion: "12.0.0",
    version: "21.0.0",
    ngImport: i0,
    type: InkBarItem,
    deps: [],
    target: i0.ɵɵFactoryTarget.Directive
  });
  static ɵdir = i0.ɵɵngDeclareDirective({
    minVersion: "16.1.0",
    version: "21.0.0",
    type: InkBarItem,
    isStandalone: true,
    inputs: {
      fitInkBarToContent: ["fitInkBarToContent", "fitInkBarToContent", booleanAttribute]
    },
    ngImport: i0
  });
}
i0.ɵɵngDeclareClassMetadata({
  minVersion: "12.0.0",
  version: "21.0.0",
  ngImport: i0,
  type: InkBarItem,
  decorators: [{
    type: Directive
  }],
  propDecorators: {
    fitInkBarToContent: [{
      type: Input,
      args: [{
        transform: booleanAttribute
      }]
    }]
  }
});
const _MAT_INK_BAR_POSITIONER = new InjectionToken('MatInkBarPositioner', {
  providedIn: 'root',
  factory: () => {
    const method = element => ({
      left: element ? (element.offsetLeft || 0) + 'px' : '0',
      width: element ? (element.offsetWidth || 0) + 'px' : '0'
    });
    return method;
  }
});

class MatTabLabelWrapper extends InkBarItem {
  elementRef = inject(ElementRef);
  disabled = false;
  focus() {
    this.elementRef.nativeElement.focus();
  }
  getOffsetLeft() {
    return this.elementRef.nativeElement.offsetLeft;
  }
  getOffsetWidth() {
    return this.elementRef.nativeElement.offsetWidth;
  }
  static ɵfac = i0.ɵɵngDeclareFactory({
    minVersion: "12.0.0",
    version: "21.0.0",
    ngImport: i0,
    type: MatTabLabelWrapper,
    deps: null,
    target: i0.ɵɵFactoryTarget.Directive
  });
  static ɵdir = i0.ɵɵngDeclareDirective({
    minVersion: "16.1.0",
    version: "21.0.0",
    type: MatTabLabelWrapper,
    isStandalone: true,
    selector: "[matTabLabelWrapper]",
    inputs: {
      disabled: ["disabled", "disabled", booleanAttribute]
    },
    host: {
      properties: {
        "class.mat-mdc-tab-disabled": "disabled",
        "attr.aria-disabled": "!!disabled"
      }
    },
    usesInheritance: true,
    ngImport: i0
  });
}
i0.ɵɵngDeclareClassMetadata({
  minVersion: "12.0.0",
  version: "21.0.0",
  ngImport: i0,
  type: MatTabLabelWrapper,
  decorators: [{
    type: Directive,
    args: [{
      selector: '[matTabLabelWrapper]',
      host: {
        '[class.mat-mdc-tab-disabled]': 'disabled',
        '[attr.aria-disabled]': '!!disabled'
      }
    }]
  }],
  propDecorators: {
    disabled: [{
      type: Input,
      args: [{
        transform: booleanAttribute
      }]
    }]
  }
});

const passiveEventListenerOptions = {
  passive: true
};
const HEADER_SCROLL_DELAY = 650;
const HEADER_SCROLL_INTERVAL = 100;
class MatPaginatedTabHeader {
  _elementRef = inject(ElementRef);
  _changeDetectorRef = inject(ChangeDetectorRef);
  _viewportRuler = inject(ViewportRuler);
  _dir = inject(Directionality, {
    optional: true
  });
  _ngZone = inject(NgZone);
  _platform = inject(Platform);
  _sharedResizeObserver = inject(SharedResizeObserver);
  _injector = inject(Injector);
  _renderer = inject(Renderer2);
  _animationsDisabled = _animationsDisabled();
  _eventCleanups;
  _scrollDistance = 0;
  _selectedIndexChanged = false;
  _destroyed = new Subject();
  _showPaginationControls = false;
  _disableScrollAfter = true;
  _disableScrollBefore = true;
  _tabLabelCount;
  _scrollDistanceChanged;
  _keyManager;
  _currentTextContent;
  _stopScrolling = new Subject();
  disablePagination = false;
  get selectedIndex() {
    return this._selectedIndex;
  }
  set selectedIndex(v) {
    const value = isNaN(v) ? 0 : v;
    if (this._selectedIndex != value) {
      this._selectedIndexChanged = true;
      this._selectedIndex = value;
      if (this._keyManager) {
        this._keyManager.updateActiveItem(value);
      }
    }
  }
  _selectedIndex = 0;
  selectFocusedIndex = new EventEmitter();
  indexFocused = new EventEmitter();
  constructor() {
    this._eventCleanups = this._ngZone.runOutsideAngular(() => [this._renderer.listen(this._elementRef.nativeElement, 'mouseleave', () => this._stopInterval())]);
  }
  ngAfterViewInit() {
    this._eventCleanups.push(this._renderer.listen(this._previousPaginator.nativeElement, 'touchstart', () => this._handlePaginatorPress('before'), passiveEventListenerOptions), this._renderer.listen(this._nextPaginator.nativeElement, 'touchstart', () => this._handlePaginatorPress('after'), passiveEventListenerOptions));
  }
  ngAfterContentInit() {
    const dirChange = this._dir ? this._dir.change : of('ltr');
    const resize = this._sharedResizeObserver.observe(this._elementRef.nativeElement).pipe(debounceTime(32), takeUntil(this._destroyed));
    const viewportResize = this._viewportRuler.change(150).pipe(takeUntil(this._destroyed));
    const realign = () => {
      this.updatePagination();
      this._alignInkBarToSelectedTab();
    };
    this._keyManager = new FocusKeyManager(this._items).withHorizontalOrientation(this._getLayoutDirection()).withHomeAndEnd().withWrap().skipPredicate(() => false);
    this._keyManager.updateActiveItem(Math.max(this._selectedIndex, 0));
    afterNextRender(realign, {
      injector: this._injector
    });
    merge(dirChange, viewportResize, resize, this._items.changes, this._itemsResized()).pipe(takeUntil(this._destroyed)).subscribe(() => {
      this._ngZone.run(() => {
        Promise.resolve().then(() => {
          this._scrollDistance = Math.max(0, Math.min(this._getMaxScrollDistance(), this._scrollDistance));
          realign();
        });
      });
      this._keyManager?.withHorizontalOrientation(this._getLayoutDirection());
    });
    this._keyManager.change.subscribe(newFocusIndex => {
      this.indexFocused.emit(newFocusIndex);
      this._setTabFocus(newFocusIndex);
    });
  }
  _itemsResized() {
    if (typeof ResizeObserver !== 'function') {
      return EMPTY;
    }
    return this._items.changes.pipe(startWith(this._items), switchMap(tabItems => new Observable(observer => this._ngZone.runOutsideAngular(() => {
      const resizeObserver = new ResizeObserver(entries => observer.next(entries));
      tabItems.forEach(item => resizeObserver.observe(item.elementRef.nativeElement));
      return () => {
        resizeObserver.disconnect();
      };
    }))), skip(1), filter(entries => entries.some(e => e.contentRect.width > 0 && e.contentRect.height > 0)));
  }
  ngAfterContentChecked() {
    if (this._tabLabelCount != this._items.length) {
      this.updatePagination();
      this._tabLabelCount = this._items.length;
      this._changeDetectorRef.markForCheck();
    }
    if (this._selectedIndexChanged) {
      this._scrollToLabel(this._selectedIndex);
      this._checkScrollingControls();
      this._alignInkBarToSelectedTab();
      this._selectedIndexChanged = false;
      this._changeDetectorRef.markForCheck();
    }
    if (this._scrollDistanceChanged) {
      this._updateTabScrollPosition();
      this._scrollDistanceChanged = false;
      this._changeDetectorRef.markForCheck();
    }
  }
  ngOnDestroy() {
    this._eventCleanups.forEach(cleanup => cleanup());
    this._keyManager?.destroy();
    this._destroyed.next();
    this._destroyed.complete();
    this._stopScrolling.complete();
  }
  _handleKeydown(event) {
    if (hasModifierKey(event)) {
      return;
    }
    switch (event.keyCode) {
      case ENTER:
      case SPACE:
        if (this.focusIndex !== this.selectedIndex) {
          const item = this._items.get(this.focusIndex);
          if (item && !item.disabled) {
            this.selectFocusedIndex.emit(this.focusIndex);
            this._itemSelected(event);
          }
        }
        break;
      default:
        this._keyManager?.onKeydown(event);
    }
  }
  _onContentChanges() {
    const textContent = this._elementRef.nativeElement.textContent;
    if (textContent !== this._currentTextContent) {
      this._currentTextContent = textContent || '';
      this._ngZone.run(() => {
        this.updatePagination();
        this._alignInkBarToSelectedTab();
        this._changeDetectorRef.markForCheck();
      });
    }
  }
  updatePagination() {
    this._checkPaginationEnabled();
    this._checkScrollingControls();
    this._updateTabScrollPosition();
  }
  get focusIndex() {
    return this._keyManager ? this._keyManager.activeItemIndex : 0;
  }
  set focusIndex(value) {
    if (!this._isValidIndex(value) || this.focusIndex === value || !this._keyManager) {
      return;
    }
    this._keyManager.setActiveItem(value);
  }
  _isValidIndex(index) {
    return this._items ? !!this._items.toArray()[index] : true;
  }
  _setTabFocus(tabIndex) {
    if (this._showPaginationControls) {
      this._scrollToLabel(tabIndex);
    }
    if (this._items && this._items.length) {
      this._items.toArray()[tabIndex].focus();
      const containerEl = this._tabListContainer.nativeElement;
      const dir = this._getLayoutDirection();
      if (dir == 'ltr') {
        containerEl.scrollLeft = 0;
      } else {
        containerEl.scrollLeft = containerEl.scrollWidth - containerEl.offsetWidth;
      }
    }
  }
  _getLayoutDirection() {
    return this._dir && this._dir.value === 'rtl' ? 'rtl' : 'ltr';
  }
  _updateTabScrollPosition() {
    if (this.disablePagination) {
      return;
    }
    const scrollDistance = this.scrollDistance;
    const translateX = this._getLayoutDirection() === 'ltr' ? -scrollDistance : scrollDistance;
    this._tabList.nativeElement.style.transform = `translateX(${Math.round(translateX)}px)`;
    if (this._platform.TRIDENT || this._platform.EDGE) {
      this._tabListContainer.nativeElement.scrollLeft = 0;
    }
  }
  get scrollDistance() {
    return this._scrollDistance;
  }
  set scrollDistance(value) {
    this._scrollTo(value);
  }
  _scrollHeader(direction) {
    const viewLength = this._tabListContainer.nativeElement.offsetWidth;
    const scrollAmount = (direction == 'before' ? -1 : 1) * viewLength / 3;
    return this._scrollTo(this._scrollDistance + scrollAmount);
  }
  _handlePaginatorClick(direction) {
    this._stopInterval();
    this._scrollHeader(direction);
  }
  _scrollToLabel(labelIndex) {
    if (this.disablePagination) {
      return;
    }
    const selectedLabel = this._items ? this._items.toArray()[labelIndex] : null;
    if (!selectedLabel) {
      return;
    }
    const viewLength = this._tabListContainer.nativeElement.offsetWidth;
    const {
      offsetLeft,
      offsetWidth
    } = selectedLabel.elementRef.nativeElement;
    let labelBeforePos, labelAfterPos;
    if (this._getLayoutDirection() == 'ltr') {
      labelBeforePos = offsetLeft;
      labelAfterPos = labelBeforePos + offsetWidth;
    } else {
      labelAfterPos = this._tabListInner.nativeElement.offsetWidth - offsetLeft;
      labelBeforePos = labelAfterPos - offsetWidth;
    }
    const beforeVisiblePos = this.scrollDistance;
    const afterVisiblePos = this.scrollDistance + viewLength;
    if (labelBeforePos < beforeVisiblePos) {
      this.scrollDistance -= beforeVisiblePos - labelBeforePos;
    } else if (labelAfterPos > afterVisiblePos) {
      this.scrollDistance += Math.min(labelAfterPos - afterVisiblePos, labelBeforePos - beforeVisiblePos);
    }
  }
  _checkPaginationEnabled() {
    if (this.disablePagination) {
      this._showPaginationControls = false;
    } else {
      const scrollWidth = this._tabListInner.nativeElement.scrollWidth;
      const containerWidth = this._elementRef.nativeElement.offsetWidth;
      const isEnabled = scrollWidth - containerWidth >= 5;
      if (!isEnabled) {
        this.scrollDistance = 0;
      }
      if (isEnabled !== this._showPaginationControls) {
        this._showPaginationControls = isEnabled;
        this._changeDetectorRef.markForCheck();
      }
    }
  }
  _checkScrollingControls() {
    if (this.disablePagination) {
      this._disableScrollAfter = this._disableScrollBefore = true;
    } else {
      this._disableScrollBefore = this.scrollDistance == 0;
      this._disableScrollAfter = this.scrollDistance == this._getMaxScrollDistance();
      this._changeDetectorRef.markForCheck();
    }
  }
  _getMaxScrollDistance() {
    const lengthOfTabList = this._tabListInner.nativeElement.scrollWidth;
    const viewLength = this._tabListContainer.nativeElement.offsetWidth;
    return lengthOfTabList - viewLength || 0;
  }
  _alignInkBarToSelectedTab() {
    const selectedItem = this._items && this._items.length ? this._items.toArray()[this.selectedIndex] : null;
    const selectedLabelWrapper = selectedItem ? selectedItem.elementRef.nativeElement : null;
    if (selectedLabelWrapper) {
      this._inkBar.alignToElement(selectedLabelWrapper);
    } else {
      this._inkBar.hide();
    }
  }
  _stopInterval() {
    this._stopScrolling.next();
  }
  _handlePaginatorPress(direction, mouseEvent) {
    if (mouseEvent && mouseEvent.button != null && mouseEvent.button !== 0) {
      return;
    }
    this._stopInterval();
    timer(HEADER_SCROLL_DELAY, HEADER_SCROLL_INTERVAL).pipe(takeUntil(merge(this._stopScrolling, this._destroyed))).subscribe(() => {
      const {
        maxScrollDistance,
        distance
      } = this._scrollHeader(direction);
      if (distance === 0 || distance >= maxScrollDistance) {
        this._stopInterval();
      }
    });
  }
  _scrollTo(position) {
    if (this.disablePagination) {
      return {
        maxScrollDistance: 0,
        distance: 0
      };
    }
    const maxScrollDistance = this._getMaxScrollDistance();
    this._scrollDistance = Math.max(0, Math.min(maxScrollDistance, position));
    this._scrollDistanceChanged = true;
    this._checkScrollingControls();
    return {
      maxScrollDistance,
      distance: this._scrollDistance
    };
  }
  static ɵfac = i0.ɵɵngDeclareFactory({
    minVersion: "12.0.0",
    version: "21.0.0",
    ngImport: i0,
    type: MatPaginatedTabHeader,
    deps: [],
    target: i0.ɵɵFactoryTarget.Directive
  });
  static ɵdir = i0.ɵɵngDeclareDirective({
    minVersion: "16.1.0",
    version: "21.0.0",
    type: MatPaginatedTabHeader,
    isStandalone: true,
    inputs: {
      disablePagination: ["disablePagination", "disablePagination", booleanAttribute],
      selectedIndex: ["selectedIndex", "selectedIndex", numberAttribute]
    },
    outputs: {
      selectFocusedIndex: "selectFocusedIndex",
      indexFocused: "indexFocused"
    },
    ngImport: i0
  });
}
i0.ɵɵngDeclareClassMetadata({
  minVersion: "12.0.0",
  version: "21.0.0",
  ngImport: i0,
  type: MatPaginatedTabHeader,
  decorators: [{
    type: Directive
  }],
  ctorParameters: () => [],
  propDecorators: {
    disablePagination: [{
      type: Input,
      args: [{
        transform: booleanAttribute
      }]
    }],
    selectedIndex: [{
      type: Input,
      args: [{
        transform: numberAttribute
      }]
    }],
    selectFocusedIndex: [{
      type: Output
    }],
    indexFocused: [{
      type: Output
    }]
  }
});

class MatTabHeader extends MatPaginatedTabHeader {
  _items;
  _tabListContainer;
  _tabList;
  _tabListInner;
  _nextPaginator;
  _previousPaginator;
  _inkBar;
  ariaLabel;
  ariaLabelledby;
  disableRipple = false;
  ngAfterContentInit() {
    this._inkBar = new MatInkBar(this._items);
    super.ngAfterContentInit();
  }
  _itemSelected(event) {
    event.preventDefault();
  }
  static ɵfac = i0.ɵɵngDeclareFactory({
    minVersion: "12.0.0",
    version: "21.0.0",
    ngImport: i0,
    type: MatTabHeader,
    deps: null,
    target: i0.ɵɵFactoryTarget.Component
  });
  static ɵcmp = i0.ɵɵngDeclareComponent({
    minVersion: "16.1.0",
    version: "21.0.0",
    type: MatTabHeader,
    isStandalone: true,
    selector: "mat-tab-header",
    inputs: {
      ariaLabel: ["aria-label", "ariaLabel"],
      ariaLabelledby: ["aria-labelledby", "ariaLabelledby"],
      disableRipple: ["disableRipple", "disableRipple", booleanAttribute]
    },
    host: {
      properties: {
        "class.mat-mdc-tab-header-pagination-controls-enabled": "_showPaginationControls",
        "class.mat-mdc-tab-header-rtl": "_getLayoutDirection() == 'rtl'"
      },
      classAttribute: "mat-mdc-tab-header"
    },
    queries: [{
      propertyName: "_items",
      predicate: MatTabLabelWrapper
    }],
    viewQueries: [{
      propertyName: "_tabListContainer",
      first: true,
      predicate: ["tabListContainer"],
      descendants: true,
      static: true
    }, {
      propertyName: "_tabList",
      first: true,
      predicate: ["tabList"],
      descendants: true,
      static: true
    }, {
      propertyName: "_tabListInner",
      first: true,
      predicate: ["tabListInner"],
      descendants: true,
      static: true
    }, {
      propertyName: "_nextPaginator",
      first: true,
      predicate: ["nextPaginator"],
      descendants: true
    }, {
      propertyName: "_previousPaginator",
      first: true,
      predicate: ["previousPaginator"],
      descendants: true
    }],
    usesInheritance: true,
    ngImport: i0,
    template: "<!--\n Note that this intentionally uses a `div` instead of a `button`, because it's not part of\n the regular tabs flow and is only here to support mouse users. It should also not be focusable.\n-->\n<div class=\"mat-mdc-tab-header-pagination mat-mdc-tab-header-pagination-before\"\n     #previousPaginator\n     mat-ripple\n     [matRippleDisabled]=\"_disableScrollBefore || disableRipple\"\n     [class.mat-mdc-tab-header-pagination-disabled]=\"_disableScrollBefore\"\n     (click)=\"_handlePaginatorClick('before')\"\n     (mousedown)=\"_handlePaginatorPress('before', $event)\"\n     (touchend)=\"_stopInterval()\">\n  <div class=\"mat-mdc-tab-header-pagination-chevron\"></div>\n</div>\n\n<div\n  class=\"mat-mdc-tab-label-container\"\n  #tabListContainer\n  (keydown)=\"_handleKeydown($event)\"\n  [class._mat-animation-noopable]=\"_animationsDisabled\">\n  <div\n    #tabList\n    class=\"mat-mdc-tab-list\"\n    role=\"tablist\"\n    [attr.aria-label]=\"ariaLabel || null\"\n    [attr.aria-labelledby]=\"ariaLabelledby || null\"\n    (cdkObserveContent)=\"_onContentChanges()\">\n    <div class=\"mat-mdc-tab-labels\" #tabListInner>\n      <ng-content></ng-content>\n    </div>\n  </div>\n</div>\n\n<div class=\"mat-mdc-tab-header-pagination mat-mdc-tab-header-pagination-after\"\n     #nextPaginator\n     mat-ripple\n     [matRippleDisabled]=\"_disableScrollAfter || disableRipple\"\n     [class.mat-mdc-tab-header-pagination-disabled]=\"_disableScrollAfter\"\n     (mousedown)=\"_handlePaginatorPress('after', $event)\"\n     (click)=\"_handlePaginatorClick('after')\"\n     (touchend)=\"_stopInterval()\">\n  <div class=\"mat-mdc-tab-header-pagination-chevron\"></div>\n</div>\n",
    styles: [".mat-mdc-tab-header{display:flex;overflow:hidden;position:relative;flex-shrink:0}.mdc-tab-indicator .mdc-tab-indicator__content{transition-duration:var(--mat-tab-animation-duration, 250ms)}.mat-mdc-tab-header-pagination{-webkit-user-select:none;user-select:none;position:relative;display:none;justify-content:center;align-items:center;min-width:32px;cursor:pointer;z-index:2;-webkit-tap-highlight-color:rgba(0,0,0,0);touch-action:none;box-sizing:content-box;outline:0}.mat-mdc-tab-header-pagination::-moz-focus-inner{border:0}.mat-mdc-tab-header-pagination .mat-ripple-element{opacity:.12;background-color:var(--mat-tab-inactive-ripple-color, var(--mat-sys-on-surface))}.mat-mdc-tab-header-pagination-controls-enabled .mat-mdc-tab-header-pagination{display:flex}.mat-mdc-tab-header-pagination-before,.mat-mdc-tab-header-rtl .mat-mdc-tab-header-pagination-after{padding-left:4px}.mat-mdc-tab-header-pagination-before .mat-mdc-tab-header-pagination-chevron,.mat-mdc-tab-header-rtl .mat-mdc-tab-header-pagination-after .mat-mdc-tab-header-pagination-chevron{transform:rotate(-135deg)}.mat-mdc-tab-header-rtl .mat-mdc-tab-header-pagination-before,.mat-mdc-tab-header-pagination-after{padding-right:4px}.mat-mdc-tab-header-rtl .mat-mdc-tab-header-pagination-before .mat-mdc-tab-header-pagination-chevron,.mat-mdc-tab-header-pagination-after .mat-mdc-tab-header-pagination-chevron{transform:rotate(45deg)}.mat-mdc-tab-header-pagination-chevron{border-style:solid;border-width:2px 2px 0 0;height:8px;width:8px;border-color:var(--mat-tab-pagination-icon-color, var(--mat-sys-on-surface))}.mat-mdc-tab-header-pagination-disabled{box-shadow:none;cursor:default;pointer-events:none}.mat-mdc-tab-header-pagination-disabled .mat-mdc-tab-header-pagination-chevron{opacity:.4}.mat-mdc-tab-list{flex-grow:1;position:relative;transition:transform 500ms cubic-bezier(0.35, 0, 0.25, 1)}._mat-animation-noopable .mat-mdc-tab-list{transition:none}.mat-mdc-tab-label-container{display:flex;flex-grow:1;overflow:hidden;z-index:1;border-bottom-style:solid;border-bottom-width:var(--mat-tab-divider-height, 1px);border-bottom-color:var(--mat-tab-divider-color, var(--mat-sys-surface-variant))}.mat-mdc-tab-group-inverted-header .mat-mdc-tab-label-container{border-bottom:none;border-top-style:solid;border-top-width:var(--mat-tab-divider-height, 1px);border-top-color:var(--mat-tab-divider-color, var(--mat-sys-surface-variant))}.mat-mdc-tab-labels{display:flex;flex:1 0 auto}[mat-align-tabs=center]>.mat-mdc-tab-header .mat-mdc-tab-labels{justify-content:center}[mat-align-tabs=end]>.mat-mdc-tab-header .mat-mdc-tab-labels{justify-content:flex-end}.cdk-drop-list .mat-mdc-tab-labels,.mat-mdc-tab-labels.cdk-drop-list{min-height:var(--mat-tab-container-height, 48px)}.mat-mdc-tab::before{margin:5px}@media(forced-colors: active){.mat-mdc-tab[aria-disabled=true]{color:GrayText}}\n"],
    dependencies: [{
      kind: "directive",
      type: MatRipple,
      selector: "[mat-ripple], [matRipple]",
      inputs: ["matRippleColor", "matRippleUnbounded", "matRippleCentered", "matRippleRadius", "matRippleAnimation", "matRippleDisabled", "matRippleTrigger"],
      exportAs: ["matRipple"]
    }, {
      kind: "directive",
      type: CdkObserveContent,
      selector: "[cdkObserveContent]",
      inputs: ["cdkObserveContentDisabled", "debounce"],
      outputs: ["cdkObserveContent"],
      exportAs: ["cdkObserveContent"]
    }],
    changeDetection: i0.ChangeDetectionStrategy.Default,
    encapsulation: i0.ViewEncapsulation.None
  });
}
i0.ɵɵngDeclareClassMetadata({
  minVersion: "12.0.0",
  version: "21.0.0",
  ngImport: i0,
  type: MatTabHeader,
  decorators: [{
    type: Component,
    args: [{
      selector: 'mat-tab-header',
      encapsulation: ViewEncapsulation.None,
      changeDetection: ChangeDetectionStrategy.Default,
      host: {
        'class': 'mat-mdc-tab-header',
        '[class.mat-mdc-tab-header-pagination-controls-enabled]': '_showPaginationControls',
        '[class.mat-mdc-tab-header-rtl]': "_getLayoutDirection() == 'rtl'"
      },
      imports: [MatRipple, CdkObserveContent],
      template: "<!--\n Note that this intentionally uses a `div` instead of a `button`, because it's not part of\n the regular tabs flow and is only here to support mouse users. It should also not be focusable.\n-->\n<div class=\"mat-mdc-tab-header-pagination mat-mdc-tab-header-pagination-before\"\n     #previousPaginator\n     mat-ripple\n     [matRippleDisabled]=\"_disableScrollBefore || disableRipple\"\n     [class.mat-mdc-tab-header-pagination-disabled]=\"_disableScrollBefore\"\n     (click)=\"_handlePaginatorClick('before')\"\n     (mousedown)=\"_handlePaginatorPress('before', $event)\"\n     (touchend)=\"_stopInterval()\">\n  <div class=\"mat-mdc-tab-header-pagination-chevron\"></div>\n</div>\n\n<div\n  class=\"mat-mdc-tab-label-container\"\n  #tabListContainer\n  (keydown)=\"_handleKeydown($event)\"\n  [class._mat-animation-noopable]=\"_animationsDisabled\">\n  <div\n    #tabList\n    class=\"mat-mdc-tab-list\"\n    role=\"tablist\"\n    [attr.aria-label]=\"ariaLabel || null\"\n    [attr.aria-labelledby]=\"ariaLabelledby || null\"\n    (cdkObserveContent)=\"_onContentChanges()\">\n    <div class=\"mat-mdc-tab-labels\" #tabListInner>\n      <ng-content></ng-content>\n    </div>\n  </div>\n</div>\n\n<div class=\"mat-mdc-tab-header-pagination mat-mdc-tab-header-pagination-after\"\n     #nextPaginator\n     mat-ripple\n     [matRippleDisabled]=\"_disableScrollAfter || disableRipple\"\n     [class.mat-mdc-tab-header-pagination-disabled]=\"_disableScrollAfter\"\n     (mousedown)=\"_handlePaginatorPress('after', $event)\"\n     (click)=\"_handlePaginatorClick('after')\"\n     (touchend)=\"_stopInterval()\">\n  <div class=\"mat-mdc-tab-header-pagination-chevron\"></div>\n</div>\n",
      styles: [".mat-mdc-tab-header{display:flex;overflow:hidden;position:relative;flex-shrink:0}.mdc-tab-indicator .mdc-tab-indicator__content{transition-duration:var(--mat-tab-animation-duration, 250ms)}.mat-mdc-tab-header-pagination{-webkit-user-select:none;user-select:none;position:relative;display:none;justify-content:center;align-items:center;min-width:32px;cursor:pointer;z-index:2;-webkit-tap-highlight-color:rgba(0,0,0,0);touch-action:none;box-sizing:content-box;outline:0}.mat-mdc-tab-header-pagination::-moz-focus-inner{border:0}.mat-mdc-tab-header-pagination .mat-ripple-element{opacity:.12;background-color:var(--mat-tab-inactive-ripple-color, var(--mat-sys-on-surface))}.mat-mdc-tab-header-pagination-controls-enabled .mat-mdc-tab-header-pagination{display:flex}.mat-mdc-tab-header-pagination-before,.mat-mdc-tab-header-rtl .mat-mdc-tab-header-pagination-after{padding-left:4px}.mat-mdc-tab-header-pagination-before .mat-mdc-tab-header-pagination-chevron,.mat-mdc-tab-header-rtl .mat-mdc-tab-header-pagination-after .mat-mdc-tab-header-pagination-chevron{transform:rotate(-135deg)}.mat-mdc-tab-header-rtl .mat-mdc-tab-header-pagination-before,.mat-mdc-tab-header-pagination-after{padding-right:4px}.mat-mdc-tab-header-rtl .mat-mdc-tab-header-pagination-before .mat-mdc-tab-header-pagination-chevron,.mat-mdc-tab-header-pagination-after .mat-mdc-tab-header-pagination-chevron{transform:rotate(45deg)}.mat-mdc-tab-header-pagination-chevron{border-style:solid;border-width:2px 2px 0 0;height:8px;width:8px;border-color:var(--mat-tab-pagination-icon-color, var(--mat-sys-on-surface))}.mat-mdc-tab-header-pagination-disabled{box-shadow:none;cursor:default;pointer-events:none}.mat-mdc-tab-header-pagination-disabled .mat-mdc-tab-header-pagination-chevron{opacity:.4}.mat-mdc-tab-list{flex-grow:1;position:relative;transition:transform 500ms cubic-bezier(0.35, 0, 0.25, 1)}._mat-animation-noopable .mat-mdc-tab-list{transition:none}.mat-mdc-tab-label-container{display:flex;flex-grow:1;overflow:hidden;z-index:1;border-bottom-style:solid;border-bottom-width:var(--mat-tab-divider-height, 1px);border-bottom-color:var(--mat-tab-divider-color, var(--mat-sys-surface-variant))}.mat-mdc-tab-group-inverted-header .mat-mdc-tab-label-container{border-bottom:none;border-top-style:solid;border-top-width:var(--mat-tab-divider-height, 1px);border-top-color:var(--mat-tab-divider-color, var(--mat-sys-surface-variant))}.mat-mdc-tab-labels{display:flex;flex:1 0 auto}[mat-align-tabs=center]>.mat-mdc-tab-header .mat-mdc-tab-labels{justify-content:center}[mat-align-tabs=end]>.mat-mdc-tab-header .mat-mdc-tab-labels{justify-content:flex-end}.cdk-drop-list .mat-mdc-tab-labels,.mat-mdc-tab-labels.cdk-drop-list{min-height:var(--mat-tab-container-height, 48px)}.mat-mdc-tab::before{margin:5px}@media(forced-colors: active){.mat-mdc-tab[aria-disabled=true]{color:GrayText}}\n"]
    }]
  }],
  propDecorators: {
    _items: [{
      type: ContentChildren,
      args: [MatTabLabelWrapper, {
        descendants: false
      }]
    }],
    _tabListContainer: [{
      type: ViewChild,
      args: ['tabListContainer', {
        static: true
      }]
    }],
    _tabList: [{
      type: ViewChild,
      args: ['tabList', {
        static: true
      }]
    }],
    _tabListInner: [{
      type: ViewChild,
      args: ['tabListInner', {
        static: true
      }]
    }],
    _nextPaginator: [{
      type: ViewChild,
      args: ['nextPaginator']
    }],
    _previousPaginator: [{
      type: ViewChild,
      args: ['previousPaginator']
    }],
    ariaLabel: [{
      type: Input,
      args: ['aria-label']
    }],
    ariaLabelledby: [{
      type: Input,
      args: ['aria-labelledby']
    }],
    disableRipple: [{
      type: Input,
      args: [{
        transform: booleanAttribute
      }]
    }]
  }
});

const MAT_TABS_CONFIG = new InjectionToken('MAT_TABS_CONFIG');

class MatTabBodyPortal extends CdkPortalOutlet {
  _host = inject(MatTabBody);
  _ngZone = inject(NgZone);
  _centeringSub = Subscription.EMPTY;
  _leavingSub = Subscription.EMPTY;
  constructor() {
    super();
  }
  ngOnInit() {
    super.ngOnInit();
    this._centeringSub = this._host._beforeCentering.pipe(startWith(this._host._isCenterPosition())).subscribe(isCentering => {
      if (this._host._content && isCentering && !this.hasAttached()) {
        this._ngZone.run(() => {
          Promise.resolve().then();
          this.attach(this._host._content);
        });
      }
    });
    this._leavingSub = this._host._afterLeavingCenter.subscribe(() => {
      if (!this._host.preserveContent) {
        this._ngZone.run(() => this.detach());
      }
    });
  }
  ngOnDestroy() {
    super.ngOnDestroy();
    this._centeringSub.unsubscribe();
    this._leavingSub.unsubscribe();
  }
  static ɵfac = i0.ɵɵngDeclareFactory({
    minVersion: "12.0.0",
    version: "21.0.0",
    ngImport: i0,
    type: MatTabBodyPortal,
    deps: [],
    target: i0.ɵɵFactoryTarget.Directive
  });
  static ɵdir = i0.ɵɵngDeclareDirective({
    minVersion: "14.0.0",
    version: "21.0.0",
    type: MatTabBodyPortal,
    isStandalone: true,
    selector: "[matTabBodyHost]",
    usesInheritance: true,
    ngImport: i0
  });
}
i0.ɵɵngDeclareClassMetadata({
  minVersion: "12.0.0",
  version: "21.0.0",
  ngImport: i0,
  type: MatTabBodyPortal,
  decorators: [{
    type: Directive,
    args: [{
      selector: '[matTabBodyHost]'
    }]
  }],
  ctorParameters: () => []
});
class MatTabBody {
  _elementRef = inject(ElementRef);
  _dir = inject(Directionality, {
    optional: true
  });
  _ngZone = inject(NgZone);
  _injector = inject(Injector);
  _renderer = inject(Renderer2);
  _diAnimationsDisabled = _animationsDisabled();
  _eventCleanups;
  _initialized;
  _fallbackTimer;
  _positionIndex;
  _dirChangeSubscription = Subscription.EMPTY;
  _position;
  _previousPosition;
  _onCentering = new EventEmitter();
  _beforeCentering = new EventEmitter();
  _afterLeavingCenter = new EventEmitter();
  _onCentered = new EventEmitter(true);
  _portalHost;
  _contentElement;
  _content;
  animationDuration = '500ms';
  preserveContent = false;
  set position(position) {
    this._positionIndex = position;
    this._computePositionAnimationState();
  }
  constructor() {
    if (this._dir) {
      const changeDetectorRef = inject(ChangeDetectorRef);
      this._dirChangeSubscription = this._dir.change.subscribe(dir => {
        this._computePositionAnimationState(dir);
        changeDetectorRef.markForCheck();
      });
    }
  }
  ngOnInit() {
    this._bindTransitionEvents();
    if (this._position === 'center') {
      this._setActiveClass(true);
      afterNextRender(() => this._onCentering.emit(this._elementRef.nativeElement.clientHeight), {
        injector: this._injector
      });
    }
    this._initialized = true;
  }
  ngOnDestroy() {
    clearTimeout(this._fallbackTimer);
    this._eventCleanups?.forEach(cleanup => cleanup());
    this._dirChangeSubscription.unsubscribe();
  }
  _bindTransitionEvents() {
    this._ngZone.runOutsideAngular(() => {
      const element = this._elementRef.nativeElement;
      const transitionDone = event => {
        if (event.target === this._contentElement?.nativeElement) {
          this._elementRef.nativeElement.classList.remove('mat-tab-body-animating');
          if (event.type === 'transitionend') {
            this._transitionDone();
          }
        }
      };
      this._eventCleanups = [this._renderer.listen(element, 'transitionstart', event => {
        if (event.target === this._contentElement?.nativeElement) {
          this._elementRef.nativeElement.classList.add('mat-tab-body-animating');
          this._transitionStarted();
        }
      }), this._renderer.listen(element, 'transitionend', transitionDone), this._renderer.listen(element, 'transitioncancel', transitionDone)];
    });
  }
  _transitionStarted() {
    clearTimeout(this._fallbackTimer);
    const isCentering = this._position === 'center';
    this._beforeCentering.emit(isCentering);
    if (isCentering) {
      this._onCentering.emit(this._elementRef.nativeElement.clientHeight);
    }
  }
  _transitionDone() {
    if (this._position === 'center') {
      this._onCentered.emit();
    } else if (this._previousPosition === 'center') {
      this._afterLeavingCenter.emit();
    }
  }
  _setActiveClass(isActive) {
    this._elementRef.nativeElement.classList.toggle('mat-mdc-tab-body-active', isActive);
  }
  _getLayoutDirection() {
    return this._dir && this._dir.value === 'rtl' ? 'rtl' : 'ltr';
  }
  _isCenterPosition() {
    return this._positionIndex === 0;
  }
  _computePositionAnimationState(dir = this._getLayoutDirection()) {
    this._previousPosition = this._position;
    if (this._positionIndex < 0) {
      this._position = dir == 'ltr' ? 'left' : 'right';
    } else if (this._positionIndex > 0) {
      this._position = dir == 'ltr' ? 'right' : 'left';
    } else {
      this._position = 'center';
    }
    if (this._animationsDisabled()) {
      this._simulateTransitionEvents();
    } else if (this._initialized && (this._position === 'center' || this._previousPosition === 'center')) {
      clearTimeout(this._fallbackTimer);
      this._fallbackTimer = this._ngZone.runOutsideAngular(() => setTimeout(() => this._simulateTransitionEvents(), 100));
    }
  }
  _simulateTransitionEvents() {
    this._transitionStarted();
    afterNextRender(() => this._transitionDone(), {
      injector: this._injector
    });
  }
  _animationsDisabled() {
    return this._diAnimationsDisabled || this.animationDuration === '0ms' || this.animationDuration === '0s';
  }
  static ɵfac = i0.ɵɵngDeclareFactory({
    minVersion: "12.0.0",
    version: "21.0.0",
    ngImport: i0,
    type: MatTabBody,
    deps: [],
    target: i0.ɵɵFactoryTarget.Component
  });
  static ɵcmp = i0.ɵɵngDeclareComponent({
    minVersion: "14.0.0",
    version: "21.0.0",
    type: MatTabBody,
    isStandalone: true,
    selector: "mat-tab-body",
    inputs: {
      _content: ["content", "_content"],
      animationDuration: "animationDuration",
      preserveContent: "preserveContent",
      position: "position"
    },
    outputs: {
      _onCentering: "_onCentering",
      _beforeCentering: "_beforeCentering",
      _onCentered: "_onCentered"
    },
    host: {
      properties: {
        "attr.inert": "_position === \"center\" ? null : \"\""
      },
      classAttribute: "mat-mdc-tab-body"
    },
    viewQueries: [{
      propertyName: "_portalHost",
      first: true,
      predicate: MatTabBodyPortal,
      descendants: true
    }, {
      propertyName: "_contentElement",
      first: true,
      predicate: ["content"],
      descendants: true
    }],
    ngImport: i0,
    template: "<div\n   class=\"mat-mdc-tab-body-content\"\n   #content\n   cdkScrollable\n   [class.mat-tab-body-content-left]=\"_position === 'left'\"\n   [class.mat-tab-body-content-right]=\"_position === 'right'\"\n   [class.mat-tab-body-content-can-animate]=\"_position === 'center' || _previousPosition === 'center'\">\n  <ng-template matTabBodyHost></ng-template>\n</div>\n",
    styles: [".mat-mdc-tab-body{top:0;left:0;right:0;bottom:0;position:absolute;display:block;overflow:hidden;outline:0;flex-basis:100%}.mat-mdc-tab-body.mat-mdc-tab-body-active{position:relative;overflow-x:hidden;overflow-y:auto;z-index:1;flex-grow:1}.mat-mdc-tab-group.mat-mdc-tab-group-dynamic-height .mat-mdc-tab-body.mat-mdc-tab-body-active{overflow-y:hidden}.mat-mdc-tab-body-content{height:100%;overflow:auto;transform:none;visibility:hidden}.mat-tab-body-animating>.mat-mdc-tab-body-content,.mat-mdc-tab-body-active>.mat-mdc-tab-body-content{visibility:visible}.mat-tab-body-animating>.mat-mdc-tab-body-content{min-height:1px}.mat-mdc-tab-group-dynamic-height .mat-mdc-tab-body-content{overflow:hidden}.mat-tab-body-content-can-animate{transition:transform var(--mat-tab-animation-duration) 1ms cubic-bezier(0.35, 0, 0.25, 1)}.mat-mdc-tab-body-wrapper._mat-animation-noopable .mat-tab-body-content-can-animate{transition:none}.mat-tab-body-content-left{transform:translate3d(-100%, 0, 0)}.mat-tab-body-content-right{transform:translate3d(100%, 0, 0)}\n"],
    dependencies: [{
      kind: "directive",
      type: MatTabBodyPortal,
      selector: "[matTabBodyHost]"
    }, {
      kind: "directive",
      type: CdkScrollable,
      selector: "[cdk-scrollable], [cdkScrollable]"
    }],
    changeDetection: i0.ChangeDetectionStrategy.Default,
    encapsulation: i0.ViewEncapsulation.None
  });
}
i0.ɵɵngDeclareClassMetadata({
  minVersion: "12.0.0",
  version: "21.0.0",
  ngImport: i0,
  type: MatTabBody,
  decorators: [{
    type: Component,
    args: [{
      selector: 'mat-tab-body',
      encapsulation: ViewEncapsulation.None,
      changeDetection: ChangeDetectionStrategy.Default,
      host: {
        'class': 'mat-mdc-tab-body',
        '[attr.inert]': '_position === "center" ? null : ""'
      },
      imports: [MatTabBodyPortal, CdkScrollable],
      template: "<div\n   class=\"mat-mdc-tab-body-content\"\n   #content\n   cdkScrollable\n   [class.mat-tab-body-content-left]=\"_position === 'left'\"\n   [class.mat-tab-body-content-right]=\"_position === 'right'\"\n   [class.mat-tab-body-content-can-animate]=\"_position === 'center' || _previousPosition === 'center'\">\n  <ng-template matTabBodyHost></ng-template>\n</div>\n",
      styles: [".mat-mdc-tab-body{top:0;left:0;right:0;bottom:0;position:absolute;display:block;overflow:hidden;outline:0;flex-basis:100%}.mat-mdc-tab-body.mat-mdc-tab-body-active{position:relative;overflow-x:hidden;overflow-y:auto;z-index:1;flex-grow:1}.mat-mdc-tab-group.mat-mdc-tab-group-dynamic-height .mat-mdc-tab-body.mat-mdc-tab-body-active{overflow-y:hidden}.mat-mdc-tab-body-content{height:100%;overflow:auto;transform:none;visibility:hidden}.mat-tab-body-animating>.mat-mdc-tab-body-content,.mat-mdc-tab-body-active>.mat-mdc-tab-body-content{visibility:visible}.m