firefox-main/browser/components/messagepreview/messagepreview.js (file symbol)

Source code

Revision control

Copy as Markdown

Other Tools

/* 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/. */
/* global MPShowMessage, MPIsEnabled, MPToggleLights */
"use strict";
// decode a 16-bit string in which only one byte of each
// 16-bit unit is occupied, to UTF-8. This is necessary to
// comply with `btoa` API constraints.
function fromBinary(encoded) {
const binary = atob(decodeURIComponent(encoded));
const bytes = new Uint8Array(binary.length);
for (let i = 0; i < bytes.length; i++) {
bytes[i] = binary.charCodeAt(i);
}
return String.fromCharCode(...new Uint16Array(bytes.buffer));
}
function decodeMessageFromUrl() {
const url = new URL(document.location.href);
if (url.searchParams.has("json")) {
const encodedMessage = url.searchParams.get("json");
return fromBinary(encodedMessage);
}
return null;
}
// Light switch things
document.addEventListener("DOMContentLoaded", () => {
document
.querySelector("#light-switch")
.addEventListener("click", MPToggleLights);
});
const message = decodeMessageFromUrl();
if (message) {
// If message preview is enabled, show the message.
if (MPIsEnabled()) {
MPShowMessage(message);
}
}