import * as i0 from '@angular/core';
import { PLATFORM_ID, Injectable, Inject, NgModule } from '@angular/core';
import { isPlatformBrowser } from '@angular/common';

// Whether the current platform supports the V8 Break Iterator. The V8 check
// is necessary to detect all Blink based browsers.
let hasV8BreakIterator;
// We need a try/catch around the reference to `Intl`, because accessing it in some cases can
// cause IE to throw. These cases are tied to particular versions of Windows and can happen if
// the consumer is providing a polyfilled `Map`. See:
// https://github.com/Microsoft/ChakraCore/issues/3189
// https://github.com/angular/components/issues/15687
try {
    hasV8BreakIterator = typeof Intl !== 'undefined' && Intl.v8BreakIterator;
}
catch {
    hasV8BreakIterator = false;
}
/**
 * Service to detect the current platform by comparing the userAgent strings and
 * checking browser-specific global properties.
 */
class Platform {
    constructor(_platformId) {
        this._platformId = _platformId;
        // We want to use the Angular platform check because if the Document is shimmed
        // without the navigator, the following checks will fail. This is preferred because
        // sometimes the Document may be shimmed without the user's knowledge or intention
        /** Whether the Angular application is being rendered in the browser. */
        this.isBrowser = this._platformId
            ? isPlatformBrowser(this._platformId)
            : typeof document === 'object' && !!document;
        /** Whether the current browser is Microsoft Edge. */
        this.EDGE = this.isBrowser && /(edge)/i.test(navigator.userAgent);
        /** Whether the current rendering engine is Microsoft Trident. */
        this.TRIDENT = this.isBrowser && /(msie|trident)/i.test(navigator.userAgent);
        // EdgeHTML and Trident mock Blink specific things and need to be excluded from this check.
        /** Whether the current rendering engine is Blink. */
        this.BLINK = this.isBrowser &&
            !!(window.chrome || hasV8BreakIterator) &&
            typeof CSS !== 'undefined' &&
            !this.EDGE &&
            !this.TRIDENT;
        // Webkit is part of the userAgent in EdgeHTML, Blink and Trident. Therefore we need to
        // ensure that Webkit runs standalone and is not used as another engine's base.
        /** Whether the current rendering engine is WebKit. */
        this.WEBKIT = this.isBrowser &&
            /AppleWebKit/i.test(navigator.userAgent) &&
            !this.BLINK &&
            !this.EDGE &&
            !this.TRIDENT;
        /** Whether the current platform is Apple iOS. */
        this.IOS = this.isBrowser && /iPad|iPhone|iPod/.test(navigator.userAgent) && !('MSStream' in window);
        // It's difficult to detect the plain Gecko engine, because most of the browsers identify
        // them self as Gecko-like browsers and modify the userAgent's according to that.
        // Since we only cover one explicit Firefox case, we can simply check for Firefox
        // instead of having an unstable check for Gecko.
        /** Whether the current browser is Firefox. */
        this.FIREFOX = this.isBrowser && /(firefox|minefield)/i.test(navigator.userAgent);
        /** Whether the current platform is Android. */
        // Trident on mobile adds the android platform to the userAgent to trick detections.
        this.ANDROID = this.isBrowser && /android/i.test(navigator.userAgent) && !this.TRIDENT;
        // Safari browsers will include the Safari keyword in their userAgent. Some browsers may fake
        // this and just place the Safari keyword in the userAgent. To be more safe about Safari every
        // Safari browser should also use Webkit as its layout engine.
        /** Whether the current browser is Safari. */
        this.SAFARI = this.isBrowser && /safari/i.test(navigator.userAgent) && this.WEBKIT;
    }
    static { this.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "16.1.1", ngImport: i0, type: Platform, deps: [{ token: PLATFORM_ID }], target: i0.ɵɵFactoryTarget.Injectable }); }
    static { this.ɵprov = i0.ɵɵngDeclareInjectable({ minVersion: "12.0.0", version: "16.1.1", ngImport: i0, type: Platform, providedIn: 'root' }); }
}
i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "16.1.1", ngImport: i0, type: Platform, decorators: [{
            type: Injectable,
            args: [{ providedIn: 'root' }]
        }], ctorParameters: function () { return [{ type: Object, decorators: [{
                    type: Inject,
                    args: [PLATFORM_ID]
                }] }]; } });

class PlatformModule {
    static { this.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "16.1.1", ngImport: i0, type: PlatformModule, deps: [], target: i0.ɵɵFactoryTarget.NgModule }); }
    static { this.ɵmod = i0.ɵɵngDeclareNgModule({ minVersion: "14.0.0", version: "16.1.1", ngImport: i0, type: PlatformModule }); }
    static { this.ɵinj = i0.ɵɵngDeclareInjector({ minVersion: "12.0.0", version: "16.1.1", ngImport: i0, type: PlatformModule }); }
}
i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "16.1.1", ngImport: i0, type: PlatformModule, decorators: [{
            type: NgModule,
            args: [{}]
        }] });

/** Cached result Set of input types support by the current browser. */
let supportedInputTypes;
/** Types of `<input>` that *might* be supported. */
const candidateInputTypes = [
    // `color` must come first. Chrome 56 shows a warning if we change the type to `color` after
    // first changing it to something else:
    // The specified value "" does not conform to the required format.
    // The format is "#rrggbb" where rr, gg, bb are two-digit hexadecimal numbers.
    'color',
    'button',
    'checkbox',
    'date',
    'datetime-local',
    'email',
    'file',
    'hidden',
    'image',
    'month',
    'number',
    'password',
    'radio',
    'range',
    'reset',
    'search',
    'submit',
    'tel',
    'text',
    'time',
    'url',
    'week',
];
/** @returns The input types supported by this browser. */
function getSupportedInputTypes() {
    // Result is cached.
    if (supportedInputTypes) {
        return supportedInputTypes;
    }
    // We can't check if an input type is not supported until we're on the browser, so say that
    // everything is supported when not on the browser. We don't use `Platform` here since it's
    // just a helper function and can't inject it.
    if (typeof document !== 'object' || !document) {
        supportedInputTypes = new Set(candidateInputTypes);
        return supportedInputTypes;
    }
    let featureTestInput = document.createElement('input');
    supportedInputTypes = new Set(candidateInputTypes.filter(value => {
        featureTestInput.setAttribute('type', value);
        return featureTestInput.type === value;
    }));
    return supportedInputTypes;
}

/** Cached result of whether the user's browser supports passive event listeners. */
let supportsPassiveEvents;
/**
 * Checks whether the user's browser supports passive event listeners.
 * See: https://github.com/WICG/EventListenerOptions/blob/gh-pages/explainer.md
 */
function supportsPassiveEventListeners() {
    if (supportsPassiveEvents == null && typeof window !== 'undefined') {
        try {
            window.addEventListener('test', null, Object.defineProperty({}, 'passive', {
                get: () => (supportsPassiveEvents = true),
            }));
        }
        finally {
            supportsPassiveEvents = supportsPassiveEvents || false;
        }
    }
    return supportsPassiveEvents;
}
/**
 * Normalizes an `AddEventListener` object to something that can be passed
 * to `addEventListener` on any browser, no matter whether it supports the
 * `options` parameter.
 * @param options Object to be normalized.
 */
function normalizePassiveListenerOptions(options) {
    return supportsPassiveEventListeners() ? options : !!options.capture;
}

/** Cached result of the way the browser handles the horizontal scroll axis in RTL mode. */
let rtlScrollAxisType;
/** Cached result of the check that indicates whether the browser supports scroll behaviors. */
let scrollBehaviorSupported;
/** Check whether the browser supports scroll behaviors. */
function supportsScrollBehavior() {
    if (scrollBehaviorSupported == null) {
        // If we're not in the browser, it can't be supported. Also check for `Element`, because
        // some projects stub out the global `document` during SSR which can throw us off.
        if (typeof document !== 'object' || !document || typeof Element !== 'function' || !Element) {
            scrollBehaviorSupported = false;
            return scrollBehaviorSupported;
        }
        // If the element can have a `scrollBehavior` style, we can be sure that it's supported.
        if ('scrollBehavior' in document.documentElement.style) {
            scrollBehaviorSupported = true;
        }
        else {
            // At this point we have 3 possibilities: `scrollTo` isn't supported at all, it's
            // supported but it doesn't handle scroll behavior, or it has been polyfilled.
            const scrollToFunction = Element.prototype.scrollTo;
            if (scrollToFunction) {
                // We can detect if the function has been polyfilled by calling `toString` on it. Native
                // functions are obfuscated using `[native code]`, whereas if it was overwritten we'd get
                // the actual function source. Via https://davidwalsh.name/detect-native-function. Consider
                // polyfilled functions as supporting scroll behavior.
                scrollBehaviorSupported = !/\{\s*\[native code\]\s*\}/.test(scrollToFunction.toString());
            }
            else {
                scrollBehaviorSupported = false;
            }
        }
    }
    return scrollBehaviorSupported;
}
/**
 * Checks the type of RTL scroll axis used by this browser. As of time of writing, Chrome is NORMAL,
 * Firefox & Safari are NEGATED, and IE & Edge are INVERTED.
 */
function getRtlScrollAxisType() {
    // We can't check unless we're on the browser. Just assume 'normal' if we're not.
    if (typeof document !== 'object' || !document) {
        return 0 /* RtlScrollAxisType.NORMAL */;
    }
    if (rtlScrollAxisType == null) {
        // Create a 1px wide scrolling container and a 2px wide content element.
        const scrollContainer = document.createElement('div');
        const containerStyle = scrollContainer.style;
        scrollContainer.dir = 'rtl';
        containerStyle.width = '1px';
        containerStyle.overflow = 'auto';
        containerStyle.visibility = 'hidden';
        containerStyle.pointerEvents = 'none';
        containerStyle.position = 'absolute';
        const content = document.createElement('div');
        const contentStyle = content.style;
        contentStyle.width = '2px';
        contentStyle.height = '1px';
        scrollContainer.appendChild(content);
        document.body.appendChild(scrollContainer);
        rtlScrollAxisType = 0 /* RtlScrollAxisType.NORMAL */;
        // The viewport starts scrolled all the way to the right in RTL mode. If we are in a NORMAL
        // browser this would mean that the scrollLeft should be 1. If it's zero instead we know we're
        // dealing with one of the other two types of browsers.
        if (scrollContainer.scrollLeft === 0) {
            // In a NEGATED browser the scrollLeft is always somewhere in [-maxScrollAmount, 0]. For an
            // INVERTED browser it is always somewhere in [0, maxScrollAmount]. We can determine which by
            // setting to the scrollLeft to 1. This is past the max for a NEGATED browser, so it will
            // return 0 when we read it again.
            scrollContainer.scrollLeft = 1;
            rtlScrollAxisType =
                scrollContainer.scrollLeft === 0 ? 1 /* RtlScrollAxisType.NEGATED */ : 2 /* RtlScrollAxisType.INVERTED */;
        }
        scrollContainer.remove();
    }
    return rtlScrollAxisType;
}

let shadowDomIsSupported;
/** Checks whether the user's browser support Shadow DOM. */
function _supportsShadowDom() {
    if (shadowDomIsSupported == null) {
        const head = typeof document !== 'undefined' ? document.head : null;
        shadowDomIsSupported = !!(head && (head.createShadowRoot || head.attachShadow));
    }
    return shadowDomIsSupported;
}
/** Gets the shadow root of an element, if supported and the element is inside the Shadow DOM. */
function _getShadowRoot(element) {
    if (_supportsShadowDom()) {
        const rootNode = element.getRootNode ? element.getRootNode() : null;
        // Note that this should be caught by `_supportsShadowDom`, but some
        // teams have been able to hit this code path on unsupported browsers.
        if (typeof ShadowRoot !== 'undefined' && ShadowRoot && rootNode instanceof ShadowRoot) {
            return rootNode;
        }
    }
    return null;
}
/**
 * Gets the currently-focused element on the page while
 * also piercing through Shadow DOM boundaries.
 */
function _getFocusedElementPierceShadowDom() {
    let activeElement = typeof document !== 'undefined' && document
        ? document.activeElement
        : null;
    while (activeElement && activeElement.shadowRoot) {
        const newActiveElement = activeElement.shadowRoot.activeElement;
        if (newActiveElement === activeElement) {
            break;
        }
        else {
            activeElement = newActiveElement;
        }
    }
    return activeElement;
}
/** Gets the target of an event while accounting for Shadow DOM. */
function _getEventTarget(event) {
    // If an event is bound outside the Shadow DOM, the `event.target` will
    // point to the shadow root so we have to use `composedPath` instead.
    return (event.composedPath ? event.composedPath()[0] : event.target);
}

/** Gets whether the code is currently running in a test environment. */
function _isTestEnvironment() {
    // We can't use `declare const` because it causes conflicts inside Google with the real typings
    // for these symbols and we can't read them off the global object, because they don't appear to
    // be attached there for some runners like Jest.
    // (see: https://github.com/angular/components/issues/23365#issuecomment-938146643)
    return (
    // @ts-ignore
    (typeof __karma__ !== 'undefined' && !!__karma__) ||
        // @ts-ignore
        (typeof jasmine !== 'undefined' && !!jasmine) ||
        // @ts-ignore
        (typeof jest !== 'undefined' && !!jest) ||
        // @ts-ignore
        (typeof Mocha !== 'undefined' && !!Mocha));
}

/**
 * Generated bundle index. Do not edit.
 */

export { Platform, PlatformModule, _getEventTarget, _getFocusedElementPierceShadowDom, _getShadowRoot, _isTestEnvironment, _supportsShadowDom, getRtlScrollAxisType, getSupportedInputTypes, normalizePassiveListenerOptions, supportsPassiveEventListeners, supportsScrollBehavior };
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