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