forked from mirrors/gecko-dev
64 lines
2 KiB
JavaScript
64 lines
2 KiB
JavaScript
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this file,
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* You can obtain one at http://mozilla.org/MPL/2.0/. */
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/* globals catcher, assertIsBlankDocument, browser */
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"use strict";
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this.clipboard = (function () {
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const exports = {};
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exports.copy = function (text) {
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return new Promise(resolve => {
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const element = document.createElement("iframe");
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element.src = browser.runtime.getURL("blank.html");
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// We can't actually hide the iframe while copying, but we can make
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// it close to invisible:
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element.style.opacity = "0";
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element.style.width = "1px";
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element.style.height = "1px";
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element.style.display = "block";
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element.addEventListener(
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"load",
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catcher.watchFunction(() => {
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try {
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const doc = element.contentDocument;
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assertIsBlankDocument(doc);
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const el = doc.createElement("textarea");
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doc.body.appendChild(el);
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el.value = text;
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if (!text) {
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const exc = new Error("Clipboard copy given empty text");
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exc.noPopup = true;
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catcher.unhandled(exc);
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}
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el.select();
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if (doc.activeElement !== el) {
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const unhandledTag = doc.activeElement
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? doc.activeElement.tagName
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: "No active element";
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const exc = new Error("Clipboard el.select failed");
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exc.activeElement = unhandledTag;
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exc.noPopup = true;
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catcher.unhandled(exc);
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}
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const copied = doc.execCommand("copy");
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if (!copied) {
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catcher.unhandled(new Error("Clipboard copy failed"));
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}
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el.remove();
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resolve(copied);
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} finally {
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element.remove();
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}
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}),
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{ once: true }
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);
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document.body.appendChild(element);
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});
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};
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return exports;
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})();
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null;
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