78 lines
2.3 KiB
JavaScript
78 lines
2.3 KiB
JavaScript
/*
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* noVNC: HTML5 VNC client
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* Copyright (c) 2021 Juanjo Díaz
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* Licensed under MPL 2.0 or any later version (see LICENSE.txt)
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*/
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export default class Clipboard {
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constructor(target) {
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this._target = target;
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this._eventHandlers = {
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'copy': this._handleCopy.bind(this),
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'focus': this._handleFocus.bind(this)
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};
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// ===== EVENT HANDLERS =====
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this.onpaste = () => {};
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}
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// ===== PRIVATE METHODS =====
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async _handleCopy(e) {
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try {
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if (navigator.permissions && navigator.permissions.query) {
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const permission = await navigator.permissions.query({ name: "clipboard-write", allowWithoutGesture: false });
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if (permission.state === 'denied') return;
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}
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} catch (err) {
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// Some browsers might error due to lack of support, e.g. Firefox.
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}
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if (navigator.clipboard.writeText) {
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try {
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await navigator.clipboard.writeText(e.clipboardData.getData('text/plain'));
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} catch (e) {
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/* Do nothing */
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}
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}
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}
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async _handleFocus() {
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try {
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if (navigator.permissions && navigator.permissions.query) {
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const permission = await navigator.permissions.query({ name: "clipboard-read", allowWithoutGesture: false });
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if (permission.state === 'denied') return;
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}
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} catch (err) {
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// Some browsers might error due to lack of support, e.g. Firefox.
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}
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if (navigator.clipboard.readText) {
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try {
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const data = await navigator.clipboard.readText();
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this.onpaste(data);
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} catch (e) {
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/* Do nothing */
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return;
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}
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}
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}
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// ===== PUBLIC METHODS =====
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grab() {
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if (!Clipboard.isSupported) return;
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this._target.addEventListener('copy', this._eventHandlers.copy);
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this._target.addEventListener('focus', this._eventHandlers.focus);
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}
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ungrab() {
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if (!Clipboard.isSupported) return;
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this._target.removeEventListener('copy', this._eventHandlers.copy);
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this._target.removeEventListener('focus', this._eventHandlers.focus);
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}
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}
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Clipboard.isSupported = (navigator && navigator.clipboard) ? true : false; |