import * as i1 from '@angular/common';
import { DOCUMENT } from '@angular/common';
import * as i0 from '@angular/core';
import { Injectable, Inject, InjectionToken, EventEmitter, Directive, NgZone, Optional, Input, Output, NgModule } from '@angular/core';

/**
 * @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
 */
/**
 * A pending copy-to-clipboard operation.
 *
 * The implementation of copying text to the clipboard modifies the DOM and
 * forces a relayout. This relayout can take too long if the string is large,
 * causing the execCommand('copy') to happen too long after the user clicked.
 * This results in the browser refusing to copy. This object lets the
 * relayout happen in a separate tick from copying by providing a copy function
 * that can be called later.
 *
 * Destroy must be called when no longer in use, regardless of whether `copy` is
 * called.
 */
class PendingCopy {
    constructor(text, _document) {
        this._document = _document;
        const textarea = this._textarea = this._document.createElement('textarea');
        const styles = textarea.style;
        // Hide the element for display and accessibility. Set a fixed position so the page layout
        // isn't affected. We use `fixed` with `top: 0`, because focus is moved into the textarea
        // for a split second and if it's off-screen, some browsers will attempt to scroll it into view.
        styles.position = 'fixed';
        styles.top = styles.opacity = '0';
        styles.left = '-999em';
        textarea.setAttribute('aria-hidden', 'true');
        textarea.value = text;
        this._document.body.appendChild(textarea);
    }
    /** Finishes copying the text. */
    copy() {
        const textarea = this._textarea;
        let successful = false;
        try { // Older browsers could throw if copy is not supported.
            if (textarea) {
                const currentFocus = this._document.activeElement;
                textarea.select();
                textarea.setSelectionRange(0, textarea.value.length);
                successful = this._document.execCommand('copy');
                if (currentFocus) {
                    currentFocus.focus();
                }
            }
        }
        catch (_a) {
            // Discard error.
            // Initial setting of {@code successful} will represent failure here.
        }
        return successful;
    }
    /** Cleans up DOM changes used to perform the copy operation. */
    destroy() {
        const textarea = this._textarea;
        if (textarea) {
            if (textarea.parentNode) {
                textarea.parentNode.removeChild(textarea);
            }
            this._textarea = undefined;
        }
    }
}

/**
 * @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
 */
/**
 * A service for copying text to the clipboard.
 */
class Clipboard {
    constructor(document) {
        this._document = document;
    }
    /**
     * Copies the provided text into the user's clipboard.
     *
     * @param text The string to copy.
     * @returns Whether the operation was successful.
     */
    copy(text) {
        const pendingCopy = this.beginCopy(text);
        const successful = pendingCopy.copy();
        pendingCopy.destroy();
        return successful;
    }
    /**
     * Prepares a string to be copied later. This is useful for large strings
     * which take too long to successfully render and be copied in the same tick.
     *
     * The caller must call `destroy` on the returned `PendingCopy`.
     *
     * @param text The string to copy.
     * @returns the pending copy operation.
     */
    beginCopy(text) {
        return new PendingCopy(text, this._document);
    }
}
Clipboard.ɵprov = i0.ɵɵdefineInjectable({ factory: function Clipboard_Factory() { return new Clipboard(i0.ɵɵinject(i1.DOCUMENT)); }, token: Clipboard, providedIn: "root" });
Clipboard.decorators = [
    { type: Injectable, args: [{ providedIn: 'root' },] }
];
Clipboard.ctorParameters = () => [
    { type: undefined, decorators: [{ type: Inject, args: [DOCUMENT,] }] }
];

/**
 * @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
 */
/** Injection token that can be used to provide the default options to `CdkCopyToClipboard`. */
const CDK_COPY_TO_CLIPBOARD_CONFIG = new InjectionToken('CDK_COPY_TO_CLIPBOARD_CONFIG');
/**
 * @deprecated Use `CDK_COPY_TO_CLIPBOARD_CONFIG` instead.
 * @breaking-change 13.0.0
 */
const CKD_COPY_TO_CLIPBOARD_CONFIG = CDK_COPY_TO_CLIPBOARD_CONFIG;
/**
 * Provides behavior for a button that when clicked copies content into user's
 * clipboard.
 */
class CdkCopyToClipboard {
    constructor(_clipboard, _ngZone, config) {
        this._clipboard = _clipboard;
        this._ngZone = _ngZone;
        /** Content to be copied. */
        this.text = '';
        /**
         * How many times to attempt to copy the text. This may be necessary for longer text, because
         * the browser needs time to fill an intermediate textarea element and copy the content.
         */
        this.attempts = 1;
        /**
         * Emits when some text is copied to the clipboard. The
         * emitted value indicates whether copying was successful.
         */
        this.copied = new EventEmitter();
        /** Copies that are currently being attempted. */
        this._pending = new Set();
        if (config && config.attempts != null) {
            this.attempts = config.attempts;
        }
    }
    /** Copies the current text to the clipboard. */
    copy(attempts = this.attempts) {
        if (attempts > 1) {
            let remainingAttempts = attempts;
            const pending = this._clipboard.beginCopy(this.text);
            this._pending.add(pending);
            const attempt = () => {
                const successful = pending.copy();
                if (!successful && --remainingAttempts && !this._destroyed) {
                    // We use 1 for the timeout since it's more predictable when flushing in unit tests.
                    this._currentTimeout = this._ngZone.runOutsideAngular(() => setTimeout(attempt, 1));
                }
                else {
                    this._currentTimeout = null;
                    this._pending.delete(pending);
                    pending.destroy();
                    this.copied.emit(successful);
                }
            };
            attempt();
        }
        else {
            this.copied.emit(this._clipboard.copy(this.text));
        }
    }
    ngOnDestroy() {
        if (this._currentTimeout) {
            clearTimeout(this._currentTimeout);
        }
        this._pending.forEach(copy => copy.destroy());
        this._pending.clear();
        this._destroyed = true;
    }
}
CdkCopyToClipboard.decorators = [
    { type: Directive, args: [{
                selector: '[cdkCopyToClipboard]',
                host: {
                    '(click)': 'copy()',
                }
            },] }
];
CdkCopyToClipboard.ctorParameters = () => [
    { type: Clipboard },
    { type: NgZone },
    { type: undefined, decorators: [{ type: Optional }, { type: Inject, args: [CKD_COPY_TO_CLIPBOARD_CONFIG,] }] }
];
CdkCopyToClipboard.propDecorators = {
    text: [{ type: Input, args: ['cdkCopyToClipboard',] }],
    attempts: [{ type: Input, args: ['cdkCopyToClipboardAttempts',] }],
    copied: [{ type: Output, args: ['cdkCopyToClipboardCopied',] }]
};

/**
 * @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
 */
class ClipboardModule {
}
ClipboardModule.decorators = [
    { type: NgModule, args: [{
                declarations: [CdkCopyToClipboard],
                exports: [CdkCopyToClipboard],
            },] }
];

/**
 * @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
 */

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

export { CDK_COPY_TO_CLIPBOARD_CONFIG, CKD_COPY_TO_CLIPBOARD_CONFIG, CdkCopyToClipboard, Clipboard, ClipboardModule, PendingCopy };
//# sourceMappingURL=clipboard.js.map