/**
 * @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 { coerceBooleanProperty } from '@angular/cdk/coercion';
import { InjectionToken } from '@angular/core';
/** Class that is applied when a tab indicator is active. */
const ACTIVE_CLASS = 'mdc-tab-indicator--active';
/** Class that is applied when the tab indicator should not transition. */
const NO_TRANSITION_CLASS = 'mdc-tab-indicator--no-transition';
/**
 * Abstraction around the MDC tab indicator that acts as the tab header's ink bar.
 * @docs-private
 */
export class MatInkBar {
    constructor(_items) {
        this._items = _items;
    }
    /** Hides the ink bar. */
    hide() {
        this._items.forEach(item => item.deactivateInkBar());
    }
    /** Aligns the ink bar to a DOM node. */
    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 clientRect = currentItem?.elementRef.nativeElement.getBoundingClientRect?.();
            // The ink bar won't animate unless we give it the `ClientRect` of the previous item.
            correspondingItem.activateInkBar(clientRect);
            this._currentItem = correspondingItem;
        }
    }
}
/**
 * Mixin that can be used to apply the `MatInkBarItem` behavior to a class.
 * Base on MDC's `MDCSlidingTabIndicatorFoundation`:
 * https://github.com/material-components/material-components-web/blob/c0a11ef0d000a098fd0c372be8f12d6a99302855/packages/mdc-tab-indicator/sliding-foundation.ts
 * @docs-private
 */
export function mixinInkBarItem(base) {
    return class extends base {
        constructor(...args) {
            super(...args);
            this._fitToContent = false;
        }
        /** Whether the ink bar should fit to the entire tab or just its content. */
        get fitInkBarToContent() {
            return this._fitToContent;
        }
        set fitInkBarToContent(v) {
            const newValue = coerceBooleanProperty(v);
            if (this._fitToContent !== newValue) {
                this._fitToContent = newValue;
                if (this._inkBarElement) {
                    this._appendInkBarElement();
                }
            }
        }
        /** Aligns the ink bar to the current item. */
        activateInkBar(previousIndicatorClientRect) {
            const element = this.elementRef.nativeElement;
            // Early exit if no indicator is present to handle cases where an indicator
            // may be activated without a prior indicator state
            if (!previousIndicatorClientRect ||
                !element.getBoundingClientRect ||
                !this._inkBarContentElement) {
                element.classList.add(ACTIVE_CLASS);
                return;
            }
            // This animation uses the FLIP approach. You can read more about it at the link below:
            // https://aerotwist.com/blog/flip-your-animations/
            // Calculate the dimensions based on the dimensions of the previous indicator
            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})`);
            // Force repaint before updating classes and transform to ensure the transform properly takes effect
            element.getBoundingClientRect();
            element.classList.remove(NO_TRANSITION_CLASS);
            element.classList.add(ACTIVE_CLASS);
            this._inkBarContentElement.style.setProperty('transform', '');
        }
        /** Removes the ink bar from the current item. */
        deactivateInkBar() {
            this.elementRef.nativeElement.classList.remove(ACTIVE_CLASS);
        }
        /** Initializes the foundation. */
        ngOnInit() {
            this._createInkBarElement();
        }
        /** Destroys the foundation. */
        ngOnDestroy() {
            this._inkBarElement?.remove();
            this._inkBarElement = this._inkBarContentElement = null;
        }
        /** Creates and appends the ink bar element. */
        _createInkBarElement() {
            const documentNode = this.elementRef.nativeElement.ownerDocument || document;
            this._inkBarElement = documentNode.createElement('span');
            this._inkBarContentElement = documentNode.createElement('span');
            this._inkBarElement.className = 'mdc-tab-indicator';
            this._inkBarContentElement.className =
                'mdc-tab-indicator__content mdc-tab-indicator__content--underline';
            this._inkBarElement.appendChild(this._inkBarContentElement);
            this._appendInkBarElement();
        }
        /**
         * Appends the ink bar to the tab host element or content, depending on whether
         * the ink bar should fit to content.
         */
        _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);
        }
    };
}
/**
 * The default positioner function for the MatInkBar.
 * @docs-private
 */
export function _MAT_INK_BAR_POSITIONER_FACTORY() {
    const method = (element) => ({
        left: element ? (element.offsetLeft || 0) + 'px' : '0',
        width: element ? (element.offsetWidth || 0) + 'px' : '0',
    });
    return method;
}
/** Injection token for the MatInkBar's Positioner. */
export const _MAT_INK_BAR_POSITIONER = new InjectionToken('MatInkBarPositioner', {
    providedIn: 'root',
    factory: _MAT_INK_BAR_POSITIONER_FACTORY,
});
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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 {BooleanInput, coerceBooleanProperty} from '@angular/cdk/coercion';\nimport {ElementRef, InjectionToken, OnDestroy, OnInit, QueryList} from '@angular/core';\n\n/**\n * Item inside a tab header relative to which the ink bar can be aligned.\n * @docs-private\n */\nexport interface MatInkBarItem extends OnInit, OnDestroy {\n  elementRef: ElementRef<HTMLElement>;\n  activateInkBar(previousIndicatorClientRect?: ClientRect): void;\n  deactivateInkBar(): void;\n  fitInkBarToContent: boolean;\n}\n\n/** Class that is applied when a tab indicator is active. */\nconst ACTIVE_CLASS = 'mdc-tab-indicator--active';\n\n/** Class that is applied when the tab indicator should not transition. */\nconst NO_TRANSITION_CLASS = 'mdc-tab-indicator--no-transition';\n\n/**\n * Abstraction around the MDC tab indicator that acts as the tab header's ink bar.\n * @docs-private\n */\nexport class MatInkBar {\n  /** Item to which the ink bar is aligned currently. */\n  private _currentItem: MatInkBarItem | undefined;\n\n  constructor(private _items: QueryList<MatInkBarItem>) {}\n\n  /** Hides the ink bar. */\n  hide() {\n    this._items.forEach(item => item.deactivateInkBar());\n  }\n\n  /** Aligns the ink bar to a DOM node. */\n  alignToElement(element: HTMLElement) {\n    const correspondingItem = this._items.find(item => item.elementRef.nativeElement === element);\n    const currentItem = this._currentItem;\n\n    if (correspondingItem === currentItem) {\n      return;\n    }\n\n    currentItem?.deactivateInkBar();\n\n    if (correspondingItem) {\n      const clientRect = currentItem?.elementRef.nativeElement.getBoundingClientRect?.();\n\n      // The ink bar won't animate unless we give it the `ClientRect` of the previous item.\n      correspondingItem.activateInkBar(clientRect);\n      this._currentItem = correspondingItem;\n    }\n  }\n}\n\n/**\n * Mixin that can be used to apply the `MatInkBarItem` behavior to a class.\n * Base on MDC's `MDCSlidingTabIndicatorFoundation`:\n * https://github.com/material-components/material-components-web/blob/c0a11ef0d000a098fd0c372be8f12d6a99302855/packages/mdc-tab-indicator/sliding-foundation.ts\n * @docs-private\n */\nexport function mixinInkBarItem<\n  T extends new (...args: any[]) => {elementRef: ElementRef<HTMLElement>},\n>(base: T): T & (new (...args: any[]) => MatInkBarItem) {\n  return class extends base {\n    constructor(...args: any[]) {\n      super(...args);\n    }\n\n    private _inkBarElement: HTMLElement | null;\n    private _inkBarContentElement: HTMLElement | null;\n    private _fitToContent = false;\n\n    /** Whether the ink bar should fit to the entire tab or just its content. */\n    get fitInkBarToContent(): boolean {\n      return this._fitToContent;\n    }\n    set fitInkBarToContent(v: BooleanInput) {\n      const newValue = coerceBooleanProperty(v);\n\n      if (this._fitToContent !== newValue) {\n        this._fitToContent = newValue;\n\n        if (this._inkBarElement) {\n          this._appendInkBarElement();\n        }\n      }\n    }\n\n    /** Aligns the ink bar to the current item. */\n    activateInkBar(previousIndicatorClientRect?: ClientRect) {\n      const element = this.elementRef.nativeElement;\n\n      // Early exit if no indicator is present to handle cases where an indicator\n      // may be activated without a prior indicator state\n      if (\n        !previousIndicatorClientRect ||\n        !element.getBoundingClientRect ||\n        !this._inkBarContentElement\n      ) {\n        element.classList.add(ACTIVE_CLASS);\n        return;\n      }\n\n      // This animation uses the FLIP approach. You can read more about it at the link below:\n      // https://aerotwist.com/blog/flip-your-animations/\n\n      // Calculate the dimensions based on the dimensions of the previous indicator\n      const currentClientRect = element.getBoundingClientRect();\n      const widthDelta = previousIndicatorClientRect.width / currentClientRect.width;\n      const xPosition = previousIndicatorClientRect.left - currentClientRect.left;\n      element.classList.add(NO_TRANSITION_CLASS);\n      this._inkBarContentElement.style.setProperty(\n        'transform',\n        `translateX(${xPosition}px) scaleX(${widthDelta})`,\n      );\n\n      // Force repaint before updating classes and transform to ensure the transform properly takes effect\n      element.getBoundingClientRect();\n\n      element.classList.remove(NO_TRANSITION_CLASS);\n      element.classList.add(ACTIVE_CLASS);\n      this._inkBarContentElement.style.setProperty('transform', '');\n    }\n\n    /** Removes the ink bar from the current item. */\n    deactivateInkBar() {\n      this.elementRef.nativeElement.classList.remove(ACTIVE_CLASS);\n    }\n\n    /** Initializes the foundation. */\n    ngOnInit() {\n      this._createInkBarElement();\n    }\n\n    /** Destroys the foundation. */\n    ngOnDestroy() {\n      this._inkBarElement?.remove();\n      this._inkBarElement = this._inkBarContentElement = null!;\n    }\n\n    /** Creates and appends the ink bar element. */\n    private _createInkBarElement() {\n      const documentNode = this.elementRef.nativeElement.ownerDocument || document;\n      this._inkBarElement = documentNode.createElement('span');\n      this._inkBarContentElement = documentNode.createElement('span');\n\n      this._inkBarElement.className = 'mdc-tab-indicator';\n      this._inkBarContentElement.className =\n        'mdc-tab-indicator__content mdc-tab-indicator__content--underline';\n\n      this._inkBarElement.appendChild(this._inkBarContentElement);\n      this._appendInkBarElement();\n    }\n\n    /**\n     * Appends the ink bar to the tab host element or content, depending on whether\n     * the ink bar should fit to content.\n     */\n    private _appendInkBarElement() {\n      if (!this._inkBarElement && (typeof ngDevMode === 'undefined' || ngDevMode)) {\n        throw Error('Ink bar element has not been created and cannot be appended');\n      }\n\n      const parentElement = this._fitToContent\n        ? this.elementRef.nativeElement.querySelector('.mdc-tab__content')\n        : this.elementRef.nativeElement;\n\n      if (!parentElement && (typeof ngDevMode === 'undefined' || ngDevMode)) {\n        throw Error('Missing element to host the ink bar');\n      }\n\n      parentElement!.appendChild(this._inkBarElement!);\n    }\n  };\n}\n\n/**\n * Interface for a MatInkBar positioner method, defining the positioning and width of the ink\n * bar in a set of tabs.\n */\nexport interface _MatInkBarPositioner {\n  (element: HTMLElement): {left: string; width: string};\n}\n\n/**\n * The default positioner function for the MatInkBar.\n * @docs-private\n */\nexport function _MAT_INK_BAR_POSITIONER_FACTORY(): _MatInkBarPositioner {\n  const method = (element: HTMLElement) => ({\n    left: element ? (element.offsetLeft || 0) + 'px' : '0',\n    width: element ? (element.offsetWidth || 0) + 'px' : '0',\n  });\n\n  return method;\n}\n\n/** Injection token for the MatInkBar's Positioner. */\nexport const _MAT_INK_BAR_POSITIONER = new InjectionToken<_MatInkBarPositioner>(\n  'MatInkBarPositioner',\n  {\n    providedIn: 'root',\n    factory: _MAT_INK_BAR_POSITIONER_FACTORY,\n  },\n);\n"]}