happy-dom/lib/clipboard/Clipboard.js

Happy DOM is a JavaScript implementation of a web browser without its graphical user interface. It includes many web standards from WHATWG DOM and HTML.

import Blob from '../file/Blob.js';
/**
 * Clipboard API.
 *
 * Reference:
 * https://developer.mozilla.org/en-US/docs/Web/API/Clipboard.
 */
export default class Clipboard {
    #window;
    #data = [];
    /**
     * Constructor.
     *
     * @param window Owner window.
     */
    constructor(window) {
        if (!window) {
            throw new TypeError('Illegal constructor');
        }
        this.#window = window;
    }
    /**
     * Returns data.
     *
     * @returns Data.
     */
    async read() {
        const permissionStatus = await this.#window.navigator.permissions.query({
            name: 'clipboard-read'
        });
        if (permissionStatus.state === 'denied') {
            throw new this.#window.DOMException(`Failed to execute 'read' on 'Clipboard': The request is not allowed`);
        }
        return this.#data;
    }
    /**
     * Returns text.
     *
     * @returns Text.
     */
    async readText() {
        const permissionStatus = await this.#window.navigator.permissions.query({
            name: 'clipboard-read'
        });
        if (permissionStatus.state === 'denied') {
            throw new this.#window.DOMException(`Failed to execute 'readText' on 'Clipboard': The request is not allowed`);
        }
        let text = '';
        for (const item of this.#data) {
            if (item.types.includes('text/plain')) {
                const data = await item.getType('text/plain');
                if (typeof data === 'string') {
                    text += data;
                }
                else {
                    // Instance of Blob
                    text += await data.text();
                }
            }
        }
        return text;
    }
    /**
     * Writes data.
     *
     * @param data Data.
     */
    async write(data) {
        const permissionStatus = await this.#window.navigator.permissions.query({
            name: 'clipboard-write'
        });
        if (permissionStatus.state === 'denied') {
            throw new this.#window.DOMException(`Failed to execute 'write' on 'Clipboard': The request is not allowed`);
        }
        this.#data = data;
    }
    /**
     * Writes text.
     *
     * @param text Text.
     */
    async writeText(text) {
        const permissionStatus = await this.#window.navigator.permissions.query({
            name: 'clipboard-write'
        });
        if (permissionStatus.state === 'denied') {
            throw new this.#window.DOMException(`Failed to execute 'writeText' on 'Clipboard': The request is not allowed`);
        }
        this.#data = [
            new this.#window.ClipboardItem({ 'text/plain': new Blob([text], { type: 'text/plain' }) })
        ];
    }
}
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