54 lines
1.7 KiB
JavaScript
54 lines
1.7 KiB
JavaScript
/* globals catcher, assertIsBlankDocument */
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"use strict";
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this.clipboard = (function() {
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let exports = {};
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exports.copy = function(text) {
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return new Promise((resolve, reject) => {
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let element = document.createElement("iframe");
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element.src = browser.extension.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.addEventListener("load", catcher.watchFunction(() => {
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try {
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let doc = element.contentDocument;
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assertIsBlankDocument(doc);
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let 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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let 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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let unhandledTag = doc.activeElement ? doc.activeElement.tagName : "No active element";
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let 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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}), {once: true});
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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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